{ "ok": true, "maintenance": { "ok": true, "service": "gauge-freshness", "generated_at": "2026-11-02T11:35:17.279Z", "maintenance": { "status": "ok", "last_started_at": "2026-11-02T11:30:40.338Z", "last_completed_at": "2026-11-02T11:30:59.319Z", "last_successful_run": "2026-11-02T11:30:59.319Z", "counts": { "processed": 27, "updated": 22, "skipped": 5, "failed": 0 }, "automatic_sources": 27 }, "issues": [], "scope": "Automatic refresh health; manual reports and known old observation dates remain separate in /status.json." }, "generated_at": "2026-11-02T11:35:17.279Z", "provider_probes_performed": false, "summary": { "datasets": 27, "need_attention": 4, "backfilling": 1, "periodic_reports": 4, "incomplete_references": 11 }, "entries": [ { "station": "ACKL", "name": "Ackley Lake", "source": "DNRC", "mode": "periodic_reports", "viewer_url": "/?station=ACKL", "reference": { "status": "references_incomplete", "full_pool_elevation_ft": null, "normal_capacity_af": 6722, "capacity_kind": "total_including_dead_storage", "elevation_status": "not_verified", "datum": "DNRC local project datum", "unresolved": [ "Obtain current normal operating elevation and datum after the 2009 spillway rehabilitation, plus the official elevation-storage curve." ], "next_source": "DNRC State Water Projects / Ackley Lake Water Users Association; existing brand-email reference request.", "sources": [ { "label": "DNRC updated project report", "url": "https://dnrc.mt.gov/_docs/water/State_Water_Projects/SWPB-Projects-Report-2024.pdf", "document_date": "2024-10", "page": 7, "value": "Full-pool capacity 6722 AF; no full-pool elevation stated." }, { "label": "DNRC spillway rehabilitation history", "url": "https://dnrc.mt.gov/Water-Resources/Dam-Safety/Dam-Funding-Resources/Case-Studies/Ackley-Lake", "value": "Principal and auxiliary spillways rehabilitated in 2009; no numeric normal-pool elevation." } ], "notes": "DNRC’s October 2024 project report confirms 6,722 AF at full pool. Current normal retention elevation, datum and elevation-storage curve are still unverified; offsets remain unavailable." }, "status": "old_report", "needs_attention": true, "messages": [ "Published lake reports are imported manually; daily telemetry backfill does not apply.", "Latest published reading in the archive is older than 45 days.", "Latest published report has a storage discrepancy; source values are preserved." ], "latest_reading": "2026/05/01", "reading_age_days": 185, "stored_readings": 27, "first_reading": "2024/02/02", "latest_report_date": "2026-04-30", "freshness": "stale", "freshness_threshold_days": 45, "fields": { "elevation_available": true, "storage_available": true, "storage_readings": 27 }, "quality_flags": [ "published_total_active_storage_discrepancy" ], "sync": { "status": "manual_reports", "last_attempt": null, "last_successful_update": null, "next_check_at": null, "consecutive_failures": 0, "in_progress": false }, "backfill": { "status": "not_applicable", "one_year": null, "two_years": null, "three_years": null, "five_years": null } }, { "station": "MDSR", "name": "Martinsdale Reservoir", "source": "DNRC", "mode": "periodic_reports", "viewer_url": "/?station=MDSR", "reference": { "status": "references_incomplete", "full_pool_elevation_ft": null, "normal_capacity_af": 23348, "capacity_kind": "published_DNRC_report_full_total_including_dead_storage", "elevation_status": "current_normal_pool_datum_not_verified", "datum": "DNRC local project datum; no unsupported geodetic conversion applied.", "unresolved": [ "Obtain current normal retention/spillway elevation and datum tied to dated lake readings.", "Obtain the current elevation-storage curve and confirm NRCS monthly storage basis versus DNRC report total/active values." ], "next_source": "Montana DNRC State Water Projects; Upper Musselshell Water Users Association", "sources": [ { "label": "DNRC project capacity and operator", "url": "https://dnrc.mt.gov/_docs/water/State_Water_Projects/Rehab/Project_Fact_Sheets/Martinsdale-Fact-Sheet-210913.pdf", "document_date": "2021-09" }, { "label": "DNRC dated lake reports and total-storage basis", "url": "https://dnrc.mt.gov/_docs/water/State_Water_Projects/Rehab/Monthly_Storage_Spreadsheets/20260430MonthlyContentsReport.pdf", "document_date": "2026-04-30" }, { "label": "NRCS monthly reservoir storage", "url": "https://wcc.sc.egov.usda.gov/awdbRestApi/services/v1/data?stationTriplets=06119000:MT:BOR&elements=RESC&duration=MONTHLY&beginDate=2024-10-01&endDate=2026-10-17", "retrieved_at": "2026-10-17", "value": "RESC, acre-feet, MONTHLY. Provider periods have no exact reading date or accompanying lake elevation. Storage basis is not reconciled with DNRC total storage; never combine differently dated values." }, { "label": "Documented reservoir boat launch", "url": "https://visitmt.com/listing/martinsdale-reservoir-fishing-access-site-3791" }, { "label": "USGS historical spillway and storage reference", "url": "https://pubs.usgs.gov/wsp/1729/report.pdf", "value": "Martinsdale total capacity 23180 AF at 4779.0 ft, historical mean-sea-level datum. Current DNRC capacity is 23348 AF; confirm current curve/datum before deriving offsets." }, { "label": "2026 Montana boating regulations", "url": "https://fwp.mt.gov/binaries/content/assets/fwp/fish/regulations/2026-boating-laws-final-for-print.pdf", "document_date": "2026", "value": "Reviewed named-waterbody restrictions; no Nilan or Martinsdale entry found. Statewide rules and posted zones still apply." }, { "label": "DNRC updated project report", "url": "https://dnrc.mt.gov/_docs/water/State_Water_Projects/SWPB-Projects-Report-2024.pdf", "document_date": "2024-10", "page": 25, "value": "Updated project fact sheet reviewed; capacities corroborate earlier documentation, with existing active/total or report conflicts retained. No new normal-pool elevation is stated." } ], "notes": "DNRC reports and the September 2021 fact sheet establish 23,348 AF at full pool. A historical USGS reference lists 4,779.0 ft / 23,180 AF; the current curve/datum and relationship to the newer capacity remain unverified. Offset and percent-full remain unavailable. Dated paired DNRC lake readings are preserved. Newer NRCS monthly storage is shown separately by reporting period and is never attached to an older lake elevation. Trailer boat access is documented; current ramp usability is not verified." }, "status": "old_report", "needs_attention": true, "messages": [ "Published lake reports are imported manually; daily telemetry backfill does not apply.", "Latest published reading in the archive is older than 45 days.", "Separate NRCS monthly storage is checked automatically once daily. A monthly refresh does not make the dated lake elevation current." ], "latest_reading": "2026/05/08", "reading_age_days": 178, "stored_readings": 25, "first_reading": "2024/01/31", "latest_report_date": "2026-04-30", "freshness": "stale", "freshness_threshold_days": 45, "fields": { "elevation_available": true, "storage_available": true, "storage_readings": 25 }, "quality_flags": [], "sync": { "status": "manual_reports", "last_attempt": null, "last_successful_update": null, "next_check_at": null, "consecutive_failures": 0, "in_progress": false }, "backfill": { "status": "not_applicable", "one_year": null, "two_years": null, "three_years": null, "five_years": null }, "monthly_storage": { "source": "NRCS AWDB", "station_triplet": "06119000:MT:BOR", "sampling": "monthly", "units": "acre-feet", "latest": { "period": "2026-09", "af": 3457, "quality_flag": "P", "source_url": "https://wcc.sc.egov.usda.gov/awdbRestApi/services/v1/data?stationTriplets=06119000%3AMT%3ABOR&elements=RESC&duration=MONTHLY&beginDate=2026-07-01&endDate=2026-10-28&periodRef=END&returnFlags=true&returnOriginalValues=true", "observation_date": null }, "series": [ { "period": "2021-11", "af": 7872, "quality_flag": "P", "source_url": "https://wcc.sc.egov.usda.gov/awdbRestApi/services/v1/data?stationTriplets=06119000%3AMT%3ABOR&elements=RESC&duration=MONTHLY&beginDate=2021-10-01&endDate=2026-10-17&periodRef=END&returnFlags=true&returnOriginalValues=true", "observation_date": null }, { "period": "2022-01", "af": 8928, "quality_flag": "P", "source_url": "https://wcc.sc.egov.usda.gov/awdbRestApi/services/v1/data?stationTriplets=06119000%3AMT%3ABOR&elements=RESC&duration=MONTHLY&beginDate=2021-10-01&endDate=2026-10-17&periodRef=END&returnFlags=true&returnOriginalValues=true", "observation_date": null }, { "period": "2022-02", "af": 9027, "quality_flag": "P", "source_url": 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"https://wcc.sc.egov.usda.gov/awdbRestApi/services/v1/data?stationTriplets=06119000%3AMT%3ABOR&elements=RESC&duration=MONTHLY&beginDate=2021-10-01&endDate=2026-10-17&periodRef=END&returnFlags=true&returnOriginalValues=true", "observation_date": null }, { "period": "2025-08", "af": 13595, "quality_flag": "P", "source_url": "https://wcc.sc.egov.usda.gov/awdbRestApi/services/v1/data?stationTriplets=06119000%3AMT%3ABOR&elements=RESC&duration=MONTHLY&beginDate=2021-10-01&endDate=2026-10-17&periodRef=END&returnFlags=true&returnOriginalValues=true", "observation_date": null }, { "period": "2025-09", "af": 11409, "quality_flag": "P", "source_url": "https://wcc.sc.egov.usda.gov/awdbRestApi/services/v1/data?stationTriplets=06119000%3AMT%3ABOR&elements=RESC&duration=MONTHLY&beginDate=2021-10-01&endDate=2026-10-17&periodRef=END&returnFlags=true&returnOriginalValues=true", "observation_date": null }, { "period": "2025-10", "af": 11082, "quality_flag": "P", "source_url": "https://wcc.sc.egov.usda.gov/awdbRestApi/services/v1/data?stationTriplets=06119000%3AMT%3ABOR&elements=RESC&duration=MONTHLY&beginDate=2021-10-01&endDate=2026-10-17&periodRef=END&returnFlags=true&returnOriginalValues=true", "observation_date": null }, { "period": "2025-11", "af": 10711, "quality_flag": "P", "source_url": "https://wcc.sc.egov.usda.gov/awdbRestApi/services/v1/data?stationTriplets=06119000%3AMT%3ABOR&elements=RESC&duration=MONTHLY&beginDate=2021-10-01&endDate=2026-10-17&periodRef=END&returnFlags=true&returnOriginalValues=true", "observation_date": null }, { "period": "2025-12", "af": 10606, "quality_flag": "P", "source_url": "https://wcc.sc.egov.usda.gov/awdbRestApi/services/v1/data?stationTriplets=06119000%3AMT%3ABOR&elements=RESC&duration=MONTHLY&beginDate=2021-10-01&endDate=2026-10-17&periodRef=END&returnFlags=true&returnOriginalValues=true", "observation_date": null }, { "period": "2026-01", "af": 10292, "quality_flag": "P", "source_url": "https://wcc.sc.egov.usda.gov/awdbRestApi/services/v1/data?stationTriplets=06119000%3AMT%3ABOR&elements=RESC&duration=MONTHLY&beginDate=2021-10-01&endDate=2026-10-17&periodRef=END&returnFlags=true&returnOriginalValues=true", "observation_date": null }, { "period": "2026-02", "af": 10242, "quality_flag": "P", "source_url": "https://wcc.sc.egov.usda.gov/awdbRestApi/services/v1/data?stationTriplets=06119000%3AMT%3ABOR&elements=RESC&duration=MONTHLY&beginDate=2021-10-01&endDate=2026-10-17&periodRef=END&returnFlags=true&returnOriginalValues=true", "observation_date": null }, { "period": "2026-03", "af": 12318, "quality_flag": "P", "source_url": "https://wcc.sc.egov.usda.gov/awdbRestApi/services/v1/data?stationTriplets=06119000%3AMT%3ABOR&elements=RESC&duration=MONTHLY&beginDate=2021-10-01&endDate=2026-10-17&periodRef=END&returnFlags=true&returnOriginalValues=true", "observation_date": null }, { "period": "2026-04", "af": 14764, "quality_flag": "P", "source_url": "https://wcc.sc.egov.usda.gov/awdbRestApi/services/v1/data?stationTriplets=06119000%3AMT%3ABOR&elements=RESC&duration=MONTHLY&beginDate=2021-10-01&endDate=2026-10-17&periodRef=END&returnFlags=true&returnOriginalValues=true", "observation_date": null }, { "period": "2026-05", "af": 13115, "quality_flag": "P", "source_url": "https://wcc.sc.egov.usda.gov/awdbRestApi/services/v1/data?stationTriplets=06119000%3AMT%3ABOR&elements=RESC&duration=MONTHLY&beginDate=2021-10-01&endDate=2026-10-17&periodRef=END&returnFlags=true&returnOriginalValues=true", "observation_date": null }, { "period": "2026-06", "af": 9927, "quality_flag": "P", "source_url": "https://wcc.sc.egov.usda.gov/awdbRestApi/services/v1/data?stationTriplets=06119000%3AMT%3ABOR&elements=RESC&duration=MONTHLY&beginDate=2021-10-01&endDate=2026-10-17&periodRef=END&returnFlags=true&returnOriginalValues=true", "observation_date": null }, { "period": "2026-07", "af": 7598, "quality_flag": "P", "source_url": "https://wcc.sc.egov.usda.gov/awdbRestApi/services/v1/data?stationTriplets=06119000%3AMT%3ABOR&elements=RESC&duration=MONTHLY&beginDate=2026-07-01&endDate=2026-10-28&periodRef=END&returnFlags=true&returnOriginalValues=true", "observation_date": null }, { "period": "2026-08", "af": 4997, "quality_flag": "P", "source_url": "https://wcc.sc.egov.usda.gov/awdbRestApi/services/v1/data?stationTriplets=06119000%3AMT%3ABOR&elements=RESC&duration=MONTHLY&beginDate=2026-07-01&endDate=2026-10-28&periodRef=END&returnFlags=true&returnOriginalValues=true", "observation_date": null }, { "period": "2026-09", "af": 3457, "quality_flag": "P", "source_url": "https://wcc.sc.egov.usda.gov/awdbRestApi/services/v1/data?stationTriplets=06119000%3AMT%3ABOR&elements=RESC&duration=MONTHLY&beginDate=2026-07-01&endDate=2026-10-28&periodRef=END&returnFlags=true&returnOriginalValues=true", "observation_date": null } ], "stored_periods": 57, "last_successful_update": "2026-11-02T00:00:58.470Z", "last_attempt": "2026-11-02T00:00:58.470Z", "next_check_at": "2026-11-03T00:00:00.000Z", "sync_error": null, "consecutive_failures": 0, "in_progress": false, "manual_refresh_cooldown_seconds": 900, "notes": "Provider monthly storage periods have no exact observation date or accompanying lake elevation. Storage basis is not reconciled with the dated operator reports; values are kept separate and percent-full is disabled." } }, { "station": "NILR", "name": "Nilan Reservoir", "source": "DNRC", "mode": "periodic_reports", "viewer_url": "/?station=NILR", "reference": { "status": "references_incomplete", "full_pool_elevation_ft": null, "normal_capacity_af": 10992, "capacity_kind": "published_DNRC_report_full_total_including_dead_storage", "elevation_status": "current_normal_pool_datum_not_verified", "datum": "DNRC local project datum; no unsupported geodetic conversion applied.", "unresolved": [ "Obtain current normal retention/spillway elevation and datum tied to dated lake readings.", "Obtain the current elevation-storage curve and confirm NRCS monthly storage basis versus DNRC report total/active values." ], "next_source": "Montana DNRC State Water Projects; Nilan Water Users Association", "sources": [ { "label": "DNRC project capacity and operator", "url": "https://dnrc.mt.gov/_docs/water/State_Water_Projects/Rehab/Project_Fact_Sheets/Nilan-Fact-Sheet-210913.pdf", "document_date": "2021-09" }, { "label": "DNRC dated lake reports and total-storage basis", "url": "https://dnrc.mt.gov/_docs/water/State_Water_Projects/Rehab/Monthly_Storage_Spreadsheets/20260430MonthlyContentsReport.pdf", "document_date": "2026-04-30" }, { "label": "NRCS monthly reservoir storage", "url": "https://wcc.sc.egov.usda.gov/awdbRestApi/services/v1/data?stationTriplets=06083000:MT:BOR&elements=RESC&duration=MONTHLY&beginDate=2024-10-01&endDate=2026-10-17", "retrieved_at": "2026-10-17", "value": "RESC, acre-feet, MONTHLY. Provider periods have no exact reading date or accompanying lake elevation. Storage basis is not reconciled with DNRC total storage; never combine differently dated values." }, { "label": "Documented reservoir boat launch", "url": "https://myfwp.mt.gov/fwpPub/landsMgmt/siteDetail.action?lmsId=39753690" }, { "label": "USGS historical spillway and usable-storage reference", "url": "https://pubs.usgs.gov/wsp/2116/report.pdf", "value": "Nilan usable 10090 AF between 4402-ft outlet and 4442.5-ft spillway; historical mean-sea-level datum. Does not verify present datum or curve." }, { "label": "2026 Montana boating regulations", "url": "https://fwp.mt.gov/binaries/content/assets/fwp/fish/regulations/2026-boating-laws-final-for-print.pdf", "document_date": "2026", "value": "Reviewed named-waterbody restrictions; no Nilan or Martinsdale entry found. Statewide rules and posted zones still apply." }, { "label": "DNRC updated project report", "url": "https://dnrc.mt.gov/_docs/water/State_Water_Projects/SWPB-Projects-Report-2024.pdf", "document_date": "2024-10", "page": 33, "value": "Updated project fact sheet reviewed; capacities corroborate earlier documentation, with existing active/total or report conflicts retained. No new normal-pool elevation is stated." } ], "notes": "DNRC monthly reports list 10,992 AF full total capacity including 900 AF dead storage; the 2021 project fact sheet lists 10,092 AF normal storage, matching the active component. Published report totals and comments are preserved, including discrepancies and estimates. The historical USGS spillway is 4,442.5 ft, but a current normal-pool/datum reference has not been verified. Offset and percent-full remain unavailable. NRCS monthly storage is shown separately by period; it is not paired with older report elevations. DNRC marks live Nilan lake telemetry unavailable." }, "status": "old_report", "needs_attention": true, "messages": [ "Published lake reports are imported manually; daily telemetry backfill does not apply.", "Latest published reading in the archive is older than 45 days.", "Separate NRCS monthly storage is checked automatically once daily. A monthly refresh does not make the dated lake elevation current." ], "latest_reading": "2025/10/30", "reading_age_days": 368, "stored_readings": 21, "first_reading": "2024/01/31", "latest_report_date": "2025-10-31", "freshness": "stale", "freshness_threshold_days": 45, "fields": { "elevation_available": true, "storage_available": true, "storage_readings": 21 }, "quality_flags": [], "sync": { "status": "manual_reports", "last_attempt": null, "last_successful_update": null, "next_check_at": null, "consecutive_failures": 0, "in_progress": false }, "backfill": { "status": "not_applicable", "one_year": null, "two_years": null, "three_years": null, "five_years": null }, "monthly_storage": { "source": "NRCS AWDB", "station_triplet": "06083000:MT:BOR", "sampling": "monthly", "units": "acre-feet", "latest": { "period": "2026-09", "af": 2627, "quality_flag": "P", "source_url": 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"https://wcc.sc.egov.usda.gov/awdbRestApi/services/v1/data?stationTriplets=06083000%3AMT%3ABOR&elements=RESC&duration=MONTHLY&beginDate=2021-10-01&endDate=2026-10-17&periodRef=END&returnFlags=true&returnOriginalValues=true", "observation_date": null }, { "period": "2024-10", "af": 4327, "quality_flag": "P", "source_url": "https://wcc.sc.egov.usda.gov/awdbRestApi/services/v1/data?stationTriplets=06083000%3AMT%3ABOR&elements=RESC&duration=MONTHLY&beginDate=2021-10-01&endDate=2026-10-17&periodRef=END&returnFlags=true&returnOriginalValues=true", "observation_date": null }, { "period": "2024-11", "af": 4395, "quality_flag": "P", "source_url": "https://wcc.sc.egov.usda.gov/awdbRestApi/services/v1/data?stationTriplets=06083000%3AMT%3ABOR&elements=RESC&duration=MONTHLY&beginDate=2021-10-01&endDate=2026-10-17&periodRef=END&returnFlags=true&returnOriginalValues=true", "observation_date": null }, { "period": "2024-12", "af": 4509, "quality_flag": "P", "source_url": "https://wcc.sc.egov.usda.gov/awdbRestApi/services/v1/data?stationTriplets=06083000%3AMT%3ABOR&elements=RESC&duration=MONTHLY&beginDate=2021-10-01&endDate=2026-10-17&periodRef=END&returnFlags=true&returnOriginalValues=true", "observation_date": null }, { "period": "2025-01", "af": 4680, "quality_flag": "P", "source_url": "https://wcc.sc.egov.usda.gov/awdbRestApi/services/v1/data?stationTriplets=06083000%3AMT%3ABOR&elements=RESC&duration=MONTHLY&beginDate=2021-10-01&endDate=2026-10-17&periodRef=END&returnFlags=true&returnOriginalValues=true", "observation_date": null }, { "period": "2025-02", "af": 4872, "quality_flag": "P", "source_url": "https://wcc.sc.egov.usda.gov/awdbRestApi/services/v1/data?stationTriplets=06083000%3AMT%3ABOR&elements=RESC&duration=MONTHLY&beginDate=2021-10-01&endDate=2026-10-17&periodRef=END&returnFlags=true&returnOriginalValues=true", "observation_date": null }, { "period": "2025-03", "af": 5176, "quality_flag": "P", "source_url": "https://wcc.sc.egov.usda.gov/awdbRestApi/services/v1/data?stationTriplets=06083000%3AMT%3ABOR&elements=RESC&duration=MONTHLY&beginDate=2021-10-01&endDate=2026-10-17&periodRef=END&returnFlags=true&returnOriginalValues=true", "observation_date": null }, { "period": "2025-04", "af": 5452, "quality_flag": "P", "source_url": "https://wcc.sc.egov.usda.gov/awdbRestApi/services/v1/data?stationTriplets=06083000%3AMT%3ABOR&elements=RESC&duration=MONTHLY&beginDate=2021-10-01&endDate=2026-10-17&periodRef=END&returnFlags=true&returnOriginalValues=true", "observation_date": null }, { "period": "2025-05", "af": 5335, "quality_flag": "P", "source_url": "https://wcc.sc.egov.usda.gov/awdbRestApi/services/v1/data?stationTriplets=06083000%3AMT%3ABOR&elements=RESC&duration=MONTHLY&beginDate=2021-10-01&endDate=2026-10-17&periodRef=END&returnFlags=true&returnOriginalValues=true", "observation_date": null }, { "period": "2025-06", "af": 3158, "quality_flag": "P", "source_url": "https://wcc.sc.egov.usda.gov/awdbRestApi/services/v1/data?stationTriplets=06083000%3AMT%3ABOR&elements=RESC&duration=MONTHLY&beginDate=2021-10-01&endDate=2026-10-17&periodRef=END&returnFlags=true&returnOriginalValues=true", "observation_date": null }, { "period": "2025-07", "af": 2731, "quality_flag": "P", "source_url": "https://wcc.sc.egov.usda.gov/awdbRestApi/services/v1/data?stationTriplets=06083000%3AMT%3ABOR&elements=RESC&duration=MONTHLY&beginDate=2021-10-01&endDate=2026-10-17&periodRef=END&returnFlags=true&returnOriginalValues=true", "observation_date": null }, { "period": "2025-09", "af": 790, "quality_flag": "P", "source_url": "https://wcc.sc.egov.usda.gov/awdbRestApi/services/v1/data?stationTriplets=06083000%3AMT%3ABOR&elements=RESC&duration=MONTHLY&beginDate=2021-10-01&endDate=2026-10-17&periodRef=END&returnFlags=true&returnOriginalValues=true", "observation_date": null }, { "period": "2025-10", "af": 2552, "quality_flag": "P", "source_url": "https://wcc.sc.egov.usda.gov/awdbRestApi/services/v1/data?stationTriplets=06083000%3AMT%3ABOR&elements=RESC&duration=MONTHLY&beginDate=2021-10-01&endDate=2026-10-17&periodRef=END&returnFlags=true&returnOriginalValues=true", "observation_date": null }, { "period": "2026-03", "af": 4392, "quality_flag": "P", "source_url": "https://wcc.sc.egov.usda.gov/awdbRestApi/services/v1/data?stationTriplets=06083000%3AMT%3ABOR&elements=RESC&duration=MONTHLY&beginDate=2021-10-01&endDate=2026-10-17&periodRef=END&returnFlags=true&returnOriginalValues=true", "observation_date": null }, { "period": "2026-05", "af": 4643, "quality_flag": "P", "source_url": "https://wcc.sc.egov.usda.gov/awdbRestApi/services/v1/data?stationTriplets=06083000%3AMT%3ABOR&elements=RESC&duration=MONTHLY&beginDate=2021-10-01&endDate=2026-10-17&periodRef=END&returnFlags=true&returnOriginalValues=true", "observation_date": null }, { "period": "2026-06", "af": 4962, "quality_flag": "P", "source_url": "https://wcc.sc.egov.usda.gov/awdbRestApi/services/v1/data?stationTriplets=06083000%3AMT%3ABOR&elements=RESC&duration=MONTHLY&beginDate=2021-10-01&endDate=2026-10-17&periodRef=END&returnFlags=true&returnOriginalValues=true", "observation_date": null }, { "period": "2026-07", "af": 3728, "quality_flag": "P", "source_url": "https://wcc.sc.egov.usda.gov/awdbRestApi/services/v1/data?stationTriplets=06083000%3AMT%3ABOR&elements=RESC&duration=MONTHLY&beginDate=2026-07-01&endDate=2026-10-28&periodRef=END&returnFlags=true&returnOriginalValues=true", "observation_date": null }, { "period": "2026-08", "af": 3122, "quality_flag": "P", "source_url": "https://wcc.sc.egov.usda.gov/awdbRestApi/services/v1/data?stationTriplets=06083000%3AMT%3ABOR&elements=RESC&duration=MONTHLY&beginDate=2026-07-01&endDate=2026-10-28&periodRef=END&returnFlags=true&returnOriginalValues=true", "observation_date": null }, { "period": "2026-09", "af": 2627, "quality_flag": "P", "source_url": "https://wcc.sc.egov.usda.gov/awdbRestApi/services/v1/data?stationTriplets=06083000%3AMT%3ABOR&elements=RESC&duration=MONTHLY&beginDate=2026-07-01&endDate=2026-10-28&periodRef=END&returnFlags=true&returnOriginalValues=true", "observation_date": null } ], "stored_periods": 52, "last_successful_update": "2026-11-02T00:01:00.984Z", "last_attempt": "2026-11-02T00:01:00.984Z", "next_check_at": "2026-11-03T00:00:00.000Z", "sync_error": null, "consecutive_failures": 0, "in_progress": false, "manual_refresh_cooldown_seconds": 900, "notes": "Provider monthly storage periods have no exact observation date or accompanying lake elevation. Storage basis is not reconciled with the dated operator reports; values are kept separate and percent-full is disabled." } }, { "station": "SWTR", "name": "Swift Reservoir", "source": "USBR", "mode": "daily_telemetry", "viewer_url": "/?station=SWTR", "reference": { "status": "references_incomplete", "full_pool_elevation_ft": null, "normal_capacity_af": 30000, "capacity_kind": "NID_normal_storage_including_dead_and_inactive", "elevation_status": "historical_design_normal_pool_current_datum_unconfirmed", "datum": "Not stated in the 1965 design report or USBR RISE elevation item; compatibility remains unverified.", "unresolved": [ "Confirm the present normal retention elevation and vertical datum against the 1965 normal-water-surface label of 4883.5 ft.", "Obtain actual current lake elevation readings and the operator’s elevation–storage curve; confirm the active/total storage basis and datum used by USBR." ], "next_source": "Pondera County Canal & Reservoir Company, office@ponderacanalcompany.com / (406) 279-3315; current as-built drawings, staff gauge readings, elevation-storage table and public feed availability.", "sources": [ { "label": "USBR normal-pool design drawing", "url": "https://www.usbr.gov/tsc/techreferences/hydraulics_lab/pubs/HYD/HYD-548.pdf", "document_date": "1965-11-24", "page": 18, "figure": 3, "value": "Figure 3 / drawing 1054-D-5: Normal W.S. El. 4883.5. Page 7 distinguishes channel crest 4883.5, emergency crest 4886, maximum water surface 4892. Design study, not current as-built or datum confirmation." }, { "label": "USBR lake elevation archive", "url": "https://data.usbr.gov/catalog/2458/item/789", "value": "Actual GPHYDROMET SWTR FB, feet; observations 2005-08-09 through 2019-08-02, verticalDatum null, provisional disclaimer. Latest 4875.92 ft; catalogue modification date is not a new reading." }, { "label": "USBR storage archive", "url": "https://data.usbr.gov/catalog/2458/item/788", "value": "Actual GPHYDROMET SWTR AF; record ends 2019-08-02. Latest storage 26681.367 AF, paired with that date’s elevation, not the 2026 operator report." }, { "label": "USACE normal capacity", "url": "https://nid.sec.usace.army.mil/api/dams/MT00581/inventory", "document_date": "2026-10-06", "value": "Swift (Pondera), Birch Creek, 1967 dam; normalStorage 30000 AF, maxStorage 34000 AF; Montana submission 2025-04-23." }, { "label": "DNRC water-right capacity", "url": "https://ftpgeoinfo.msl.mt.gov/Documents/Water/WaterRights/Abstracts/WRD2090AR__245325__2.pdf", "document_date": "2017-03-13", "page": 1, "value": "41M 162023-00, Swift Reservoir: 30000 AF capacity; 205 ft dam height, 172 ft depth, 488 acres. No full-pool elevation." }, { "label": "Operator reservoir report", "url": "https://ponderacanalcompany.com/operations-and-weather", "document_date": "2026-08-25", "value": "Swift 26468 AF. No Swift elevation is provided; 3805 ft on the same page explicitly belongs to Frances." } ], "notes": "USBR’s 1965 design drawing labels normal water surface 4,883.5 ft; 4,886 ft is the emergency spillway crest, not normal pool. Current as-built elevation and datum compatibility remain unconfirmed, so offsets are unavailable. Normal storage is 30,000 AF. The published USBR lake elevation/storage record ends August 2, 2019; no current lake elevation was found." }, "status": "stale", "needs_attention": true, "messages": [ "Published USBR lake archive ends 2019-08-02; recent successful queries do not establish current lake readings.", "Latest reading is older than the two-day telemetry freshness threshold." ], "latest_reading": "2019/08/02", "reading_age_days": 2649, "stored_readings": 365, "first_reading": "2018/08/03", "freshness": "stale", "freshness_threshold_days": 2, "fields": { "elevation_available": true, "storage_available": true, "storage_readings": 365 }, "sync": { "status": "ok", "interval_seconds": 604800, "last_attempt": "2026-10-29T01:32:26.063Z", "last_successful_update": "2026-10-29T01:32:26.063Z", "next_check_at": "2026-11-05T00:00:00.000Z", "consecutive_failures": 0, "in_progress": false }, "backfill": { "status": "in_progress", "one_year": { "checked_days": 20, "target_days": 365, "complete": false }, "two_years": { "checked_days": 20, "target_days": 730, "complete": false }, "three_years": { "checked_days": 20, "target_days": 1095, "complete": false }, "five_years": { "checked_days": 20, "target_days": 1825, "complete": false } } }, { "station": "BHR", "name": "Bighorn Lake (Yellowtail)", "source": "USBR", "mode": "daily_telemetry", "viewer_url": "/?station=BHR", "reference": { "status": "references_verified", "full_pool_elevation_ft": 3640, "normal_capacity_af": 1011052, "capacity_kind": "cumulative_total_storage_at_top_of_joint_use", "elevation_status": "verified_published_top_of_joint_use_pool", "datum": "USBR native project elevation in feet; allocation and GP Hydromet station basis. No geodetic conversion applied; exact national-datum realization is not established by the allocation chart.", "unresolved": [], "next_source": null, "sources": [ { "label": "USBR reservoir allocation chart", "url": "https://www.usbr.gov/gp/aop/resaloc/bighorn_lake.pdf", "document_date": "2020-08-27", "page": 1, "value": "Top of joint use 3640 ft; cumulative storage 1011052 AF. Active conservation elevation 3614 ft is recorded separately." }, { "label": "USBR exact lake station and published fill definition", "url": "https://www.usbr.gov/gp-bin/arcweb_bhr.pl", "retrieved_at": "2026-10-17", "value": "Daily lake FB and AF, not downstream stage; provider footnote defines percent against total volume. Rounded percent is not used to infer a normal-pool elevation." }, { "label": "USBR explicit full-pool operating definition", "url": "https://www.usbr.gov/newsroom/news-release/4570?region=2", "document_date": "2023-06-29", "value": "Defines 3640 ft top of joint use as full pool and distinguishes exclusive flood space above it." } ], "notes": "Full pool uses USBR’s published top of joint use: 3,640.00 ft / 1,011,052 AF cumulative total storage. Top of active conservation is separately 3,614.00 ft / 778,317 AF; the joint-use pool is part of the full operating reference. No observed maximum or rounded percent-full correlation is used. Percent-full is not calculated by Gauge." }, "status": "ready", "needs_attention": false, "messages": [], "latest_reading": "2026/10/31", "reading_age_days": 2, "stored_readings": 1838, "first_reading": "2021/10/20", "freshness": "current", "freshness_threshold_days": 2, "fields": { "elevation_available": true, "storage_available": true, "storage_readings": 1772 }, "sync": { "status": "ok", "interval_seconds": 1800, "last_attempt": "2026-11-02T11:30:41.106Z", "last_successful_update": "2026-11-02T11:30:41.106Z", "next_check_at": "2026-11-02T12:00:00.000Z", "consecutive_failures": 0, "in_progress": false }, "backfill": { "status": "complete", "one_year": { "checked_days": 365, "target_days": 365, "complete": true }, "two_years": { "checked_days": 730, "target_days": 730, "complete": true }, "three_years": { "checked_days": 1095, "target_days": 1095, "complete": true }, "five_years": { "checked_days": 1825, "target_days": 1825, "complete": true } } }, { "station": "CFR", "name": "Canyon Ferry Lake", "source": "USBR", "mode": "daily_telemetry", "viewer_url": "/?station=CFR", "reference": { "status": "references_verified", "full_pool_elevation_ft": 3797, "normal_capacity_af": 1886950, "capacity_kind": "cumulative_total_storage_at_top_of_joint_use", "elevation_status": "verified_published_top_of_joint_use_pool", "datum": "RPVD; document has contradictory higher/lower wording for its 0.08-ft NGVD29 difference. Preserve native project datum; no datum conversion is supported here.", "unresolved": [], "next_source": null, "sources": [ { "label": "USBR reservoir allocation chart", "url": "https://www.usbr.gov/gp/aop/resaloc/canyon_ferry.pdf", "document_date": "2020-08-27", "page": 1, "value": "Top of joint use 3797 ft; cumulative storage 1886950 AF. Active conservation elevation 3770 ft is recorded separately." }, { "label": "USBR exact lake station and published fill definition", "url": "https://www.usbr.gov/gp-bin/arcweb_cfr.pl", "retrieved_at": "2026-10-17", "value": "Daily lake FB and AF, not downstream stage; provider footnote defines percent against total volume. Rounded percent is not used to infer a normal-pool elevation." }, { "label": "USBR published area-capacity table", "url": "https://www.usbr.gov/tsc/techreferences/reservoir/CanyonFerryReservoir2016AreaCapacityTables-Rev1_final508.pdf", "document_date": "2021-03", "page": 126, "value": "At 3784.52 ft the published table gives 1480636.38 AF; GP daily feed gives 1480637 AF." } ], "notes": "Full pool uses USBR’s published top of joint use: 3,797.00 ft / 1,886,950 AF cumulative total storage. Top of active conservation is separately 3,770.00 ft / 1,087,216 AF; the joint-use pool is part of the full operating reference. No observed maximum or rounded percent-full correlation is used. Percent-full is not calculated by Gauge. Current GP AF agrees with the published capacity table at the same elevation; the daily percent/full-to-fill denominator may retain an older capacity and is not used." }, "status": "ready", "needs_attention": false, "messages": [], "latest_reading": "2026/10/31", "reading_age_days": 2, "stored_readings": 1838, "first_reading": "2021/10/20", "freshness": "current", "freshness_threshold_days": 2, "fields": { "elevation_available": true, "storage_available": true, "storage_readings": 1478 }, "sync": { "status": "ok", "interval_seconds": 1800, "last_attempt": "2026-11-02T11:30:41.247Z", "last_successful_update": "2026-11-02T11:30:41.247Z", "next_check_at": "2026-11-02T12:00:00.000Z", "consecutive_failures": 0, "in_progress": false }, "backfill": { "status": "complete", "one_year": { "checked_days": 365, "target_days": 365, "complete": true }, "two_years": { "checked_days": 730, "target_days": 730, "complete": true }, "three_years": { "checked_days": 1095, "target_days": 1095, "complete": true }, "five_years": { "checked_days": 1825, "target_days": 1825, "complete": true } } }, { "station": "CCR", "name": "Clark Canyon Reservoir", "source": "USBR", "mode": "daily_telemetry", "viewer_url": "/?station=CCR", "reference": { "status": "references_verified", "full_pool_elevation_ft": 5546.1, "normal_capacity_af": 174300, "capacity_kind": "cumulative_total_storage_at_top_of_joint_use", "elevation_status": "verified_published_top_of_joint_use_pool", "datum": "Local Reclamation Project Vertical Datum (RPVD); reference and observations use the native project elevation. No conversion applied.", "unresolved": [], "next_source": null, "sources": [ { "label": "USBR reservoir allocation chart", "url": "https://www.usbr.gov/gp/aop/resaloc/clark_canyon.pdf", "document_date": "2019-10-31", "page": 1, "value": "Top of joint use 5546.1 ft; cumulative storage 174300 AF. Active conservation elevation 5535.7 ft is recorded separately." }, { "label": "USBR exact lake station and published fill definition", "url": "https://www.usbr.gov/gp-bin/arcweb_ccr.pl", "retrieved_at": "2026-10-17", "value": "Daily lake FB and AF, not downstream stage; provider footnote defines percent against total volume. Rounded percent is not used to infer a normal-pool elevation." }, { "label": "USBR published area-capacity table", "url": "https://www.usbr.gov/tsc/techreferences/reservoir/ClarkCanyonReservoir2016AreaCapacityTables_Final508Compliant.pdf", "document_date": "2020-01", "page": 84, "value": "At 5516.66 ft the published table gives 57779.86 AF; GP daily feed gives 57780 AF." } ], "notes": "Full pool uses USBR’s published top of joint use: 5,546.10 ft / 174,300 AF cumulative total storage. Top of active conservation is separately 5,535.70 ft / 125,016 AF; the joint-use pool is part of the full operating reference. No observed maximum or rounded percent-full correlation is used. Percent-full is not calculated by Gauge. Current GP AF agrees with the published capacity table at the same elevation; the daily percent/full-to-fill denominator may retain an older capacity and is not used." }, "status": "ready", "needs_attention": false, "messages": [], "latest_reading": "2026/10/31", "reading_age_days": 2, "stored_readings": 1838, "first_reading": "2021/10/20", "freshness": "current", "freshness_threshold_days": 2, "fields": { "elevation_available": true, "storage_available": true, "storage_readings": 1838 }, "sync": { "status": "ok", "interval_seconds": 1800, "last_attempt": "2026-11-02T11:30:41.115Z", "last_successful_update": "2026-11-02T11:30:41.115Z", "next_check_at": "2026-11-02T12:00:00.000Z", "consecutive_failures": 0, "in_progress": false }, "backfill": { "status": "complete", "one_year": { "checked_days": 365, "target_days": 365, "complete": true }, "two_years": { "checked_days": 730, "target_days": 730, "complete": true }, "three_years": { "checked_days": 1095, "target_days": 1095, "complete": true }, "five_years": { "checked_days": 1825, "target_days": 1825, "complete": true } } }, { "station": "COOR", "name": "Cooney Reservoir", "source": "DNRC", "mode": "daily_telemetry", "viewer_url": "/?station=COOR", "reference": { "status": "references_incomplete", "full_pool_elevation_ft": null, "normal_capacity_af": 28230, "capacity_kind": "DNRC_2026_full_pool_total_including_dead_storage", "elevation_status": "current_normal_full_pool_not_verified", "datum": "StAGE Lake_Elev_NGVD (realization unspecified); monthly operator report uses local project datum.", "unresolved": [ "Obtain explicit current normal retention/guard-dike elevation and vertical datum; generic site elevation 4251 ft and near-full observations do not establish the baseline.", "Confirm active versus total basis and storage curve; API aligns with active storage, whereas published full capacity includes 90 AF dead storage.", "Confirm whether FWP’s 2026 ordinary high-water mark of 4251 ft equals the operator’s normal full-pool/guard-dike crest and the StAGE datum." ], "next_source": "DNRC State Water Projects / Rock Creek Water Users Association: current O&M storage table, normal retention elevation and datum.", "sources": [ { "label": "DNRC lake measurements", "url": "https://gis.dnrc.mt.gov/apps/stage/gage-report/location/566a2906dee14771902d9d453e6ad763", "value": "Actual Lake_Elev_NGVD lake elevation (ft) and Total Storage (Acre-ft); provisional. Exact sensor IDs recorded in reference metadata." }, { "label": "DNRC project fact sheet", "url": "https://dnrc.mt.gov/_docs/water/State_Water_Projects/Rehab/Project_Fact_Sheets/Cooney-Fact-Sheet-210913.pdf", "document_date": "2021-09", "page": 1, "value": "28230 AF at guard-dike crest; spillway/guard-dike configuration changed in 1982. No numerical full-pool elevation supplied." }, { "label": "DNRC operations report", "url": "https://dnrc.mt.gov/_docs/water/State_Water_Projects/Rehab/Monthly_Storage_Spreadsheets/20260430MonthlyContentsReport.pdf", "document_date": "2026-04-30", "page": 1, "value": "Full capacity and paired reading date/elevation/storage; elevations in local project datum; total contents include dead storage." }, { "label": "DNRC water-right abstract", "url": "https://wrqsproxy.dnrc.mt.gov/Report?/WRQS/WRD2090AR&P_WRGT_ID_SEQ=208262&P_VERS_ID_SEQ=3&rs:Command=Render&rs:Format=PDF", "retrieved_at": "2026-10-17", "value": "43D 119247-00 version 3: 28230 AF including 4200 AF added in 1982; no numerical full-pool elevation." }, { "label": "DNRC updated project report", "url": "https://dnrc.mt.gov/_docs/water/State_Water_Projects/SWPB-Projects-Report-2024.pdf", "document_date": "2024-10", "page": 11, "value": "Updated project fact sheet reviewed; capacities corroborate earlier documentation, with existing active/total or report conflicts retained. No new normal-pool elevation is stated." }, { "label": "FWP 2026 shoreline drawings — high-water mark only", "url": "https://fwp.mt.gov/binaries/content/assets/fwp/aboutfwp/design-and-construction/2026/cooney-sp-fema-repairs/drawings.pdf", "document_date": "2026-01", "page": 4, "value": "Ordinary High Water Mark 4251.0 ft. Does not identify current normal operating pool, guard-dike crest, or vertical datum. Not used for offsets." } ], "notes": "DNRC lists 28,230 AF full total capacity, including 90 AF dead storage. API storage matches the report’s active-storage comment, so raw API storage is preserved and percent-full is disabled. StAGE location elevation 4,251 ft is only a candidate; no explicit current full-pool elevation and datum reference was verified, so offset is unavailable. FWP’s January 2026 shoreline drawings label 4,251 ft as ordinary high water; they do not establish normal operating pool or datum." }, "status": "ready", "needs_attention": false, "messages": [], "latest_reading": "2026/11/01", "reading_age_days": 1, "stored_readings": 977, "first_reading": "2024/01/01", "freshness": "current", "freshness_threshold_days": 2, "fields": { "elevation_available": true, "storage_available": true, "storage_readings": 977 }, "sync": { "status": "ok", "interval_seconds": 1800, "last_attempt": "2026-11-02T11:30:42.422Z", "last_successful_update": "2026-11-02T11:30:42.422Z", "next_check_at": "2026-11-02T12:00:00.000Z", "consecutive_failures": 0, "in_progress": false }, "backfill": { "status": "complete", "one_year": { "checked_days": 365, "target_days": 365, "complete": true }, "two_years": { "checked_days": 730, "target_days": 730, "complete": true }, "three_years": { "checked_days": 1095, "target_days": 1095, "complete": true }, "five_years": { "checked_days": 1825, "target_days": 1825, "complete": true } } }, { "station": "DMBR", "name": "Deadman's Basin Reservoir", "source": "DNRC", "mode": "daily_telemetry", "viewer_url": "/?station=DMBR", "reference": { "status": "references_incomplete", "full_pool_elevation_ft": 3921, "normal_capacity_af": 72218, "capacity_kind": "published_normal_pool_storage", "elevation_status": "verified_published_normal_full_pool", "datum": "Mean sea level in DNRC water-right record; StAGE parameter Lake_Elev_NGVD (realization unspecified)", "unresolved": [ "Confirm API storage basis and the compatible normal capacity with DNRC; the API label Total Storage conflicts with the dated report comparison." ], "next_source": "DNRC State Water Projects / Water Measurement Program: confirm storage curve and active versus total storage basis.", "sources": [ { "label": "Full-pool elevation", "url": "https://ftpgeoinfo.msl.mt.gov/Documents/Water/WaterRights/Abstracts/WRD2090AR__208644__2.pdf", "document_date": "2017-04-04", "page": 2, "value": "Normal full-pool elevation 3921 ft above mean sea level. The listed 76820 AF is not used as normal storage." }, { "label": "DNRC normal capacity", "url": "https://dnrc.mt.gov/_docs/water/State_Water_Projects/Rehab/Project_Fact_Sheets/Deadmans-Fact-Sheet-210913.pdf", "document_date": "2021-09", "page": 1, "value": "72218 AF at normal full pool" }, { "label": "USACE inventory", "url": "https://nid.sec.usace.army.mil/api/dams/MT00011/inventory", "document_date": "2026-10-06", "value": "normalStorage 72218; maxStorage 100000" }, { "label": "DNRC operations report", "url": "https://dnrc.mt.gov/_docs/water/State_Water_Projects/Rehab/Monthly_Storage_Spreadsheets/20260430MonthlyContentsReport.pdf", "document_date": "2026-04-30", "page": 1, "value": "Full total capacity 75968 AF; dead storage 3750 AF; reading 3919.0 ft / 71870 AF total / 68119.27 AF active" }, { "label": "DNRC updated project report", "url": "https://dnrc.mt.gov/_docs/water/State_Water_Projects/SWPB-Projects-Report-2024.pdf", "document_date": "2024-10", "page": 15, "value": "Updated project fact sheet reviewed; capacities corroborate earlier documentation, with existing active/total or report conflicts retained. No new normal-pool elevation is stated." } ], "notes": "Normal full pool is 3,921 ft. Published normal storage is 72,218 AF; monthly operations reports list 75,968 AF including 3,750 AF dead storage. API storage matches the active-storage comment in the April report; its storage basis still needs operator confirmation before percent-full is calculated." }, "status": "ready", "needs_attention": false, "messages": [], "latest_reading": "2026/10/31", "reading_age_days": 2, "stored_readings": 908, "first_reading": "2024/03/24", "freshness": "current", "freshness_threshold_days": 2, "fields": { "elevation_available": true, "storage_available": true, "storage_readings": 908 }, "sync": { "status": "ok", "interval_seconds": 1800, "last_attempt": "2026-11-02T11:30:42.456Z", "last_successful_update": "2026-11-02T11:30:42.456Z", "next_check_at": "2026-11-02T12:00:00.000Z", "consecutive_failures": 0, "in_progress": false }, "backfill": { "status": "complete", "one_year": { "checked_days": 365, "target_days": 365, "complete": true }, "two_years": { "checked_days": 730, "target_days": 730, "complete": true }, "three_years": { "checked_days": 1095, "target_days": 1095, "complete": true }, "five_years": { "checked_days": 1825, "target_days": 1825, "complete": true } } }, { "station": "FTPK", "name": "Fort Peck Lake", "source": "USACE", "mode": "daily_telemetry", "viewer_url": "/?station=FTPK", "reference": { "status": "references_verified", "full_pool_elevation_ft": 2234, "normal_capacity_af": 14788340, "capacity_kind": "cumulative_total_storage_at_top_of_multipurpose_pool", "elevation_status": "verified_published_top_of_multipurpose_pool", "datum": "USACE local project datum; CWMS native NGVD-29, feet. No NAVD88 conversion applied. The bulletin and exact-time CWMS observation agree.", "unresolved": [], "next_source": null, "sources": [ { "label": "USACE dated normal and flood-pool bulletin", "url": "https://www.nwd-mr.usace.army.mil/rcc/reports/pdfs/MRBWM_Reservoir.pdf", "document_date": "2026-10-16", "value": "MP 2234 ft / 14788340 AF cumulative; FC 2250 ft / 18462840 AF. All Corps project elevations are local project datums." }, { "label": "USACE reservoir observations", "url": "https://water.sec.usace.army.mil/overview/nwdm/locations/ftpk", "retrieved_at": "2026-10-17", "value": "NWDM FTPK forebay elevation and total storage, Best-MRBWM observations; exclude tailwater, forecasts and flood-storage series. Native vertical datum reports NGVD-29." }, { "label": "Documented reservoir boat ramps and elevation limits", "url": "https://www.nwd-mr.usace.army.mil/rcc/reports/ftpkramps.html", "document_date": "2021-10-07", "value": "Lists Fort Peck Marina and reservoir trailer ramps. Facility existence and design ramp elevations do not guarantee current usability." }, { "label": "USACE quality-code definitions", "url": "https://www.hec.usace.army.mil/confluence/dssdocs/dsscprogrammer/time-series-data", "value": "Quality bit 1 screened, bit 2 okay; code 0 unscreened, code 3 screened okay. Gauge conservatively accepts only these combinations." } ], "notes": "Full pool uses the top of multipurpose pool, 2,234 ft / 14,788,340 AF cumulative total storage. The 2,250-ft / 18,462,840-AF flood pool is separate. Daily lake elevation is sampled at midnight US/Central and storage is joined only at the identical timestamp; a pending or missing daily storage value stays unavailable. USACE operational observations are subject to revision. Reservoir trailer ramps are documented; current ramp usability is not verified." }, "status": "ready", "needs_attention": false, "messages": [], "latest_reading": "2026/11/02", "reading_age_days": 0, "stored_readings": 1836, "first_reading": "2021/10/20", "freshness": "current", "freshness_threshold_days": 2, "fields": { "elevation_available": true, "storage_available": false, "storage_readings": 1834 }, "sync": { "status": "ok", "interval_seconds": 1800, "last_attempt": "2026-11-02T11:30:44.332Z", "last_successful_update": "2026-11-02T11:30:44.332Z", "next_check_at": "2026-11-02T12:00:00.000Z", "consecutive_failures": 0, "in_progress": false }, "backfill": { "status": "complete", "one_year": { "checked_days": 365, "target_days": 365, "complete": true }, "two_years": { "checked_days": 730, "target_days": 730, "complete": true }, "three_years": { "checked_days": 1095, "target_days": 1095, "complete": true }, "five_years": { "checked_days": 1825, "target_days": 1825, "complete": true } } }, { "station": "FRR", "name": "Fresno Reservoir", "source": "USBR", "mode": "daily_telemetry", "viewer_url": "/?station=FRR", "reference": { "status": "references_incomplete", "full_pool_elevation_ft": 2575, "normal_capacity_af": 91746, "capacity_kind": "cumulative_total_storage_at_top_of_joint_use", "elevation_status": "verified_published_top_of_joint_use_pool", "datum": "USBR native project elevation in feet; current AF curve compatibility is unresolved. No conversion applied.", "unresolved": [ "Confirm the current GP AF elevation-storage curve and why it differs from the published 2010 table and allocation capacity; do not recompute or replace raw AF." ], "next_source": "USBR Montana Area Office reservoir operations / Technical Service Center: current operational area-capacity curve and effective date.", "sources": [ { "label": "USBR reservoir allocation chart", "url": "https://www.usbr.gov/gp/aop/resaloc/fresno.pdf", "document_date": "2016-06-28", "page": 1, "value": "Top of joint use 2575 ft; cumulative storage 91746 AF. Active conservation elevation 2567 ft is recorded separately." }, { "label": "USBR exact lake station and published fill definition", "url": "https://www.usbr.gov/gp-bin/arcweb_frr.pl", "retrieved_at": "2026-10-17", "value": "Daily lake FB and AF, not downstream stage; provider footnote defines percent against total volume. Rounded percent is not used to infer a normal-pool elevation." }, { "label": "USBR published area-capacity table", "url": "https://www.usbr.gov/tsc/techreferences/reservoir/Fresno%20Reservoir%202010%20Area%20and%20Capatity%20Tables.pdf", "document_date": "2010-06", "page": 23, "value": "At 2566.91 ft the published table gives 57591 AF; GP daily feed gives 55982 AF." } ], "notes": "Full pool uses USBR’s published top of joint use: 2,575.00 ft / 91,746 AF cumulative total storage. Top of active conservation is separately 2,567.00 ft / 57,905 AF; the joint-use pool is part of the full operating reference. No observed maximum or rounded percent-full correlation is used. Capacity compatibility remains unresolved: the 2010 table gives 57,591 AF at 2,566.91 ft, while the current GP feed gives 55,982 AF. The daily rounded percent still implies the older 92,880-AF denominator. Offset is supported; percent-full remains unavailable." }, "status": "ready", "needs_attention": false, "messages": [], "latest_reading": "2026/10/31", "reading_age_days": 2, "stored_readings": 1838, "first_reading": "2021/10/20", "freshness": "current", "freshness_threshold_days": 2, "fields": { "elevation_available": true, "storage_available": true, "storage_readings": 1838 }, "sync": { "status": "ok", "interval_seconds": 1800, "last_attempt": "2026-11-02T11:30:44.191Z", "last_successful_update": "2026-11-02T11:30:44.191Z", "next_check_at": "2026-11-02T12:00:00.000Z", "consecutive_failures": 0, "in_progress": false }, "backfill": { "status": "complete", "one_year": { "checked_days": 365, "target_days": 365, "complete": true }, "two_years": { "checked_days": 730, "target_days": 730, "complete": true }, "three_years": { "checked_days": 1095, "target_days": 1095, "complete": true }, "five_years": { "checked_days": 1825, "target_days": 1825, "complete": true } } }, { "station": "GIBR", "name": "Gibson Reservoir", "source": "USBR", "mode": "daily_telemetry", "viewer_url": "/?station=GIBR", "reference": { "status": "references_verified", "full_pool_elevation_ft": 4724, "normal_capacity_af": 98688, "capacity_kind": "cumulative_total_storage_at_top_of_active_conservation", "elevation_status": "verified_published_top_of_active_conservation_pool", "datum": "USBR native project elevation in feet; allocation and GP Hydromet station basis. No geodetic conversion applied; exact national-datum realization is not established by the allocation chart.", "unresolved": [], "next_source": null, "sources": [ { "label": "USBR reservoir allocation chart", "url": "https://www.usbr.gov/gp/aop/resaloc/gibson.pdf", "document_date": "2013-09-13", "page": 1, "value": "Top of active conservation 4724 ft; cumulative storage 98688 AF. Active conservation elevation 4724 ft is recorded separately." }, { "label": "USBR exact lake station and published fill definition", "url": "https://www.usbr.gov/gp-bin/arcweb_gibr.pl", "retrieved_at": "2026-10-17", "value": "Daily lake FB and AF, not downstream stage; provider footnote defines percent against total volume. Rounded percent is not used to infer a normal-pool elevation." } ], "notes": "Full pool uses USBR’s published top of active conservation: 4,724.00 ft / 98,688 AF cumulative total storage. No observed maximum or rounded percent-full correlation is used. Stored paired readings near the independently published full elevation agree with the allocation capacity within source rounding. Percent-full is not calculated by Gauge." }, "status": "ready", "needs_attention": false, "messages": [], "latest_reading": "2026/10/31", "reading_age_days": 2, "stored_readings": 1838, "first_reading": "2021/10/20", "freshness": "current", "freshness_threshold_days": 2, "fields": { "elevation_available": true, "storage_available": true, "storage_readings": 1838 }, "sync": { "status": "ok", "interval_seconds": 1800, "last_attempt": "2026-11-02T11:30:45.325Z", "last_successful_update": "2026-11-02T11:30:45.325Z", "next_check_at": "2026-11-02T12:00:00.000Z", "consecutive_failures": 0, "in_progress": false }, "backfill": { "status": "complete", "one_year": { "checked_days": 365, "target_days": 365, "complete": true }, "two_years": { "checked_days": 730, "target_days": 730, "complete": true }, "three_years": { "checked_days": 1095, "target_days": 1095, "complete": true }, "five_years": { "checked_days": 1825, "target_days": 1825, "complete": true } } }, { "station": "HEBR", "name": "Hebgen Lake", "source": "USBR", "mode": "daily_telemetry", "viewer_url": "/?station=HEBR", "reference": { "status": "references_verified", "full_pool_elevation_ft": 6534.87, "normal_capacity_af": 386181, "capacity_kind": "USBR_operating_total_below_full_pool_from_explicit_storage_and_storage_to_fill", "elevation_status": "verified_operator_normal_full_pool", "datum": "Operator mean-sea-level/project elevation in feet. USBR daily lake elevation plus reported feet-to-fill agrees within its 0.1-ft precision; no NAVD88 conversion applied.", "unresolved": [], "next_source": null, "sources": [ { "label": "NorthWestern normal full pool in FERC filing", "url": "https://www.northwesternenergy.com/docs/default-source/default-document-library/clean-energy/environmental-projects/missouri-madison-hydro-project/madison-drought-impact-study.pdf", "document_date": "2022-09-16", "page": 1, "value": "Explicit normal full pool 6534.87 ft; licensed summer minimum 6530.26 ft is a different reference." }, { "label": "USBR daily lake and explicit storage-to-fill", "url": "https://www.usbr.gov/gp-bin/arcweb_hebr.pl", "retrieved_at": "2026-10-17", "value": "Daily Oct 15: lake 6530.0 ft, 4.9 ft to fill; 325686 AF, 60495 AF to fill. Capacity 386181 is explicit storage-plus-remaining-volume arithmetic, not inferred from rounded percent or observed maximum." } ], "notes": "NorthWestern’s FERC filing explicitly identifies normal full pool as 6,534.87 ft. USBR’s October 15 daily lake page reports 325,686 AF plus 60,495 AF to fill, giving an operating reference of 386,181 AF; its older allocation summary rounds capacity to 386,000 AF. This is the feed’s operating storage basis, not a new bathymetric survey. Offset uses the operator’s normal level; percent-full is not calculated by Gauge." }, "status": "ready", "needs_attention": false, "messages": [], "latest_reading": "2026/10/31", "reading_age_days": 2, "stored_readings": 1838, "first_reading": "2021/10/20", "freshness": "current", "freshness_threshold_days": 2, "fields": { "elevation_available": true, "storage_available": true, "storage_readings": 1838 }, "sync": { "status": "ok", "interval_seconds": 1800, "last_attempt": "2026-11-02T11:30:46.028Z", "last_successful_update": "2026-11-02T11:30:46.028Z", "next_check_at": "2026-11-02T12:00:00.000Z", "consecutive_failures": 0, "in_progress": false }, "backfill": { "status": "complete", "one_year": { "checked_days": 365, "target_days": 365, "complete": true }, "two_years": { "checked_days": 730, "target_days": 730, "complete": true }, "three_years": { "checked_days": 1095, "target_days": 1095, "complete": true }, "five_years": { "checked_days": 1825, "target_days": 1825, "complete": true } } }, { "station": "HVR", "name": "Helena Valley Reservoir", "source": "USBR", "mode": "daily_telemetry", "viewer_url": "/?station=HVR", "reference": { "status": "references_verified", "full_pool_elevation_ft": 3820.07, "normal_capacity_af": 10451, "capacity_kind": "cumulative_total_storage_at_top_of_active_conservation", "elevation_status": "verified_published_top_of_active_conservation_pool", "datum": "USBR native project elevation in feet; allocation and GP Hydromet station basis. No geodetic conversion applied; exact national-datum realization is not established by the allocation chart.", "unresolved": [], "next_source": null, "sources": [ { "label": "USBR reservoir allocation chart", "url": "https://www.usbr.gov/gp/aop/resaloc/helena_valley.pdf", "document_date": "2012-10-16", "page": 1, "value": "Top of active conservation 3820.07 ft; cumulative storage 10451 AF. Active conservation elevation 3820.07 ft is recorded separately." }, { "label": "USBR exact lake station and published fill definition", "url": "https://www.usbr.gov/gp-bin/arcweb_hvr.pl", "retrieved_at": "2026-10-17", "value": "Daily lake FB and AF, not downstream stage; provider footnote defines percent against total volume. Rounded percent is not used to infer a normal-pool elevation." } ], "notes": "Full pool uses USBR’s published top of active conservation: 3,820.07 ft / 10,451 AF cumulative total storage. No observed maximum or rounded percent-full correlation is used. Current provider storage plus explicitly published storage-to-fill equals 10,451 AF; the maximum/surcharge level 3,820.55 ft is separate. Percent-full is not calculated by Gauge." }, "status": "ready", "needs_attention": false, "messages": [], "latest_reading": "2026/10/31", "reading_age_days": 2, "stored_readings": 1838, "first_reading": "2021/10/20", "freshness": "current", "freshness_threshold_days": 2, "fields": { "elevation_available": true, "storage_available": true, "storage_readings": 1838 }, "sync": { "status": "ok", "interval_seconds": 1800, "last_attempt": "2026-11-02T11:30:47.493Z", "last_successful_update": "2026-11-02T11:30:47.493Z", "next_check_at": "2026-11-02T12:00:00.000Z", "consecutive_failures": 0, "in_progress": false }, "backfill": { "status": "complete", "one_year": { "checked_days": 365, "target_days": 365, "complete": true }, "two_years": { "checked_days": 730, "target_days": 730, "complete": true }, "three_years": { "checked_days": 1095, "target_days": 1095, "complete": true }, "five_years": { "checked_days": 1825, "target_days": 1825, "complete": true } } }, { "station": "HGH", "name": "Hungry Horse Reservoir", "source": "USBR", "mode": "daily_telemetry", "viewer_url": "/?station=HGH", "reference": { "status": "references_verified", "full_pool_elevation_ft": 3560, "normal_capacity_af": 3467179, "capacity_kind": "total_reservoir_at_top_of_active_conservation_pool", "elevation_status": "verified_published_top_of_active_conservation_pool", "datum": "USBR project / CPN lake-elevation datum, feet. RISE verticalDatum is null; no NAVD88 conversion applied. Published project conservation-pool level is used with that project’s CPN FB series.", "unresolved": [], "next_source": null, "sources": [ { "label": "USBR normal-pool and capacity reference", "url": "https://www.usbr.gov/projects/index.php?id=255", "retrieved_at": "2026-10-17", "value": "Top of active conservation pool 3560 ft; total storage 3467179 AF at 3560. The separate Normal Water Surface Elevation 3336 ft field conflicts with the explicit conservation-pool reference and is not used." }, { "label": "USBR regional lake archive", "url": "https://www.usbr.gov/pn-bin/inventory.pl?site=hgh&ui=true&interval=daily", "value": "CPN HGH FB lake elevation (ft) and AF storage (acre-feet); provisional; provider daily date retained. Great Plains is not the source." }, { "label": "USBR RISE elevation catalogue", "url": "https://data.usbr.gov/catalog/8277/item/130875", "value": "Actual daily instantaneous lake elevation, source CPNHydromet; verticalDatum null." }, { "label": "USACE inventory capacity", "url": "https://nid.sec.usace.army.mil/api/dams/MT00565/inventory", "document_date": "2025-10-22", "value": "Normal storage 3468000 AF (rounded), maximum 3588000 AF; use explicit USBR 3467179 AF at 3560 ft for exact reference." }, { "label": "Documented trailer boat launch", "url": "https://www.recreation.gov/camping/campgrounds/234788", "value": "Doris Point Boat Launch; facility existence does not establish availability at the current lake level." } ], "notes": "Normal conservation pool is 3,560 ft; USBR publishes 3,467,179 AF total storage at that elevation. NID rounds normal storage to 3,468,000 AF. CPN’s June 24, 2026 observation is 3,559.81 ft / 3,462,664 AF, consistent with the published reference. Doris Point has a documented trailer boat ramp; current ramp usability is not verified. These are lake readings, not South Fork river stage." }, "status": "ready", "needs_attention": false, "messages": [], "latest_reading": "2026/11/01", "reading_age_days": 1, "stored_readings": 1839, "first_reading": "2021/10/20", "freshness": "current", "freshness_threshold_days": 2, "fields": { "elevation_available": true, "storage_available": true, "storage_readings": 1839 }, "sync": { "status": "ok", "interval_seconds": 1800, "last_attempt": "2026-11-02T11:30:46.376Z", "last_successful_update": "2026-11-02T11:30:46.376Z", "next_check_at": "2026-11-02T12:00:00.000Z", "consecutive_failures": 0, "in_progress": false }, "backfill": { "status": "complete", "one_year": { "checked_days": 365, "target_days": 365, "complete": true }, "two_years": { "checked_days": 730, "target_days": 730, "complete": true }, "three_years": { "checked_days": 1095, "target_days": 1095, "complete": true }, "five_years": { "checked_days": 1825, "target_days": 1825, "complete": true } } }, { "station": "HYAL", "name": "Hyalite Reservoir (Middle Creek)", "source": "DNRC", "mode": "daily_telemetry", "viewer_url": "/?station=HYAL", "reference": { "status": "references_verified", "full_pool_elevation_ft": 6721, "normal_capacity_af": 10184, "capacity_kind": "total_storage_at_normal_principal_spillway_pool", "elevation_status": "verified_published_principal_spillway_normal_pool", "datum": "DNRC local project / MSL reference; StAGE parameter Lake_Elev_NGVD. Realization not specified; no NAVD88 conversion applied.", "unresolved": [], "next_source": null, "sources": [ { "label": "DNRC normal full-pool capacity", "url": "https://dnrc.mt.gov/_docs/water/middlecreek_factsheet.pdf", "document_date": "2014-10", "value": "10184 acre-feet at normal full pool, after the 1991-1992 raising." }, { "label": "Gallatin Conservation District principal spillway elevation and capacity", "url": "https://gallatincd.org/wp-content/uploads/sites/51/2021/01/December-WSO-Report.pdf", "document_date": "2020-12", "value": "Page 6: principal spillway 6721 ft MSL / 10184 AF; emergency 6723 / 10707 and crest 6730 / 12790 are not normal full pool." }, { "label": "DNRC dated lake-elevation and total-storage cross-check", "url": "https://dnrc.mt.gov/_docs/water/State_Water_Projects/Rehab/Monthly_Storage_Spreadsheets/20260430MonthlyContentsReport.pdf", "document_date": "2026-04-30", "value": "Middle Creek lake 6709.3 ft / 7558 AF total at April 30, matching actual same-day StAGE observations within rounding; capacities include dead storage." }, { "label": "DNRC actual lake telemetry", "url": "https://gis.dnrc.mt.gov/apps/stage/gage-report/location/3fc0c228ac7a4071b3919f3c04594c28", "retrieved_at": "2026-10-17", "value": "Lake res elevation, feet, and Total Storage, acre-feet; provisional. Location 41H 01900; not inflow or below-dam creek gauges." }, { "label": "USFS documented boat launch", "url": "https://www.fs.usda.gov/Internet/FSE_DOCUMENTS/fseprd1027269.pdf", "document_date": "2022-05", "value": "Hyalite Picnic Area and Boat Launch; facility listing does not establish current ramp usability." }, { "label": "Montana boating access and no-wake rule", "url": "https://data.visitmt.com/data/site/6190", "retrieved_at": "2026-10-17", "value": "Boat ramps and low-speed motoring for trolling; reservoir-wide no-wake." }, { "label": "DNRC updated project report", "url": "https://dnrc.mt.gov/_docs/water/State_Water_Projects/SWPB-Projects-Report-2024.pdf", "document_date": "2024-10", "page": 27, "value": "Updated project fact sheet reviewed; capacities corroborate earlier documentation, with existing active/total or report conflicts retained. No new normal-pool elevation is stated." } ], "notes": "Normal full pool is the principal spillway at 6,721 ft / 10,184 AF total storage. The emergency spillway at 6,723 ft and dam crest at 6,730 ft are separate. April 30, 2026 lake telemetry agrees with the dated operator report in elevation and total storage. Boat ramps are documented; the entire reservoir is no-wake. Current ramp usability is not verified." }, "status": "ready", "needs_attention": false, "messages": [], "latest_reading": "2026/10/31", "reading_age_days": 2, "stored_readings": 1791, "first_reading": "2021/10/20", "freshness": "current", "freshness_threshold_days": 2, "fields": { "elevation_available": true, "storage_available": true, "storage_readings": 1134 }, "sync": { "status": "ok", "interval_seconds": 1800, "last_attempt": "2026-11-02T11:30:47.687Z", "last_successful_update": "2026-11-02T11:30:47.687Z", "next_check_at": "2026-11-02T12:00:00.000Z", "consecutive_failures": 0, "in_progress": false }, "backfill": { "status": "complete", "one_year": { "checked_days": 365, "target_days": 365, "complete": true }, "two_years": { "checked_days": 730, "target_days": 730, "complete": true }, "three_years": { "checked_days": 1095, "target_days": 1095, "complete": true }, "five_years": { "checked_days": 1825, "target_days": 1825, "complete": true } } }, { "station": "CMO", "name": "Lake Como", "source": "USBR", "mode": "daily_telemetry", "viewer_url": "/?station=CMO", "reference": { "status": "references_verified", "full_pool_elevation_ft": 4246, "normal_capacity_af": 38495, "capacity_kind": "active_conservation_storage_excluding_natural_lake_dead_storage", "elevation_status": "verified_published_top_of_active_conservation_pool", "datum": "USBR project / CPN lake-elevation datum, feet. RISE verticalDatum is null; no NAVD88 conversion applied. Published project conservation-pool level is used with that project’s CPN FB series.", "unresolved": [], "next_source": null, "sources": [ { "label": "USBR normal-pool and capacity reference", "url": "https://www.usbr.gov/projects/index.php?id=30", "retrieved_at": "2026-10-17", "value": "Normal water surface and top of active conservation pool 4246 ft; 1992–1994 modification raised spillway and active capacity to about 38500 AF. Tabular 38495 AF is labeled total, while narrative identifies active capacity; distinguish from natural-lake dead volume." }, { "label": "USBR regional lake archive", "url": "https://www.usbr.gov/pn-bin/inventory.pl?site=cmo&ui=true&interval=daily", "value": "CPN CMO FB lake elevation (ft) and AF storage (acre-feet); provisional; provider daily date retained. Great Plains is not the source." }, { "label": "USBR RISE elevation catalogue", "url": "https://data.usbr.gov/catalog/8202/item/129825", "value": "Actual daily instantaneous lake elevation, source CPNHydromet; verticalDatum null." }, { "label": "USACE inventory capacity", "url": "https://nid.sec.usace.army.mil/api/dams/MT00564/inventory", "document_date": "2024-11-21", "value": "Normal storage 38495 AF, maximum 40700 AF. Maximum inventory capacity is not the normal-pool denominator." }, { "label": "USBR historical bathymetry and storage basis", "url": "https://data.usbr.gov/rise/content-rise-public/rise/catalog-item/binary/LakeComoReservoirDam_BathymetricSurveyReport_1991_508.pdf", "document_date": "1992-08", "value": "1991 survey distinguishes 6832 AF natural-lake dead capacity from active storage. Its 4236-ft old spillway/normal reference predates 1992–1994 raising; not used for current normal pool." }, { "label": "Documented trailer boat launch", "url": "https://www.fs.usda.gov/visit/destinations?page=566", "value": "South Lake Como Boating Site; facility existence does not establish availability at the current lake level." }, { "label": "Montana lake boating description", "url": "https://data.visitmt.com/data/site/21587", "retrieved_at": "2026-10-17", "value": "State tourism listing explicitly describes launching watercraft to fish, motor, or paddle Lake Como." } ], "notes": "Normal conservation pool is 4,246 ft, established by the 1992–1994 dam modification. Published conservation capacity is 38,495 AF. CPN AF tracks usable conservation storage; it excludes the underlying natural-lake volume described in the older survey. July 9, 2026 CPN reading 4,246.07 ft / 38,560 AF corroborates that basis. South Lake Como has a documented trailer boat launch; current ramp usability is not verified." }, "status": "ready", "needs_attention": false, "messages": [], "latest_reading": "2026/11/01", "reading_age_days": 1, "stored_readings": 1838, "first_reading": "2021/10/20", "freshness": "current", "freshness_threshold_days": 2, "fields": { "elevation_available": true, "storage_available": true, "storage_readings": 1838 }, "sync": { "status": "ok", "interval_seconds": 1800, "last_attempt": "2026-11-02T11:30:42.362Z", "last_successful_update": "2026-11-02T11:30:42.362Z", "next_check_at": "2026-11-02T12:00:00.000Z", "consecutive_failures": 0, "in_progress": false }, "backfill": { "status": "complete", "one_year": { "checked_days": 365, "target_days": 365, "complete": true }, "two_years": { "checked_days": 730, "target_days": 730, "complete": true }, "three_years": { "checked_days": 1095, "target_days": 1095, "complete": true }, "five_years": { "checked_days": 1825, "target_days": 1825, "complete": true } } }, { "station": "LER", "name": "Lake Elwell (Tiber Reservoir)", "source": "USBR", "mode": "daily_telemetry", "viewer_url": "/?station=LER", "reference": { "status": "references_verified", "full_pool_elevation_ft": 2993, "normal_capacity_af": 918394, "capacity_kind": "cumulative_total_storage_at_top_of_joint_use", "elevation_status": "verified_published_top_of_joint_use_pool", "datum": "Local Reclamation Project Vertical Datum (RPVD), equivalent to NGVD29 and 3.02 ft below NAVD88 per 2021 survey; no conversion applied.", "unresolved": [], "next_source": null, "sources": [ { "label": "USBR reservoir allocation chart", "url": "https://www.usbr.gov/gp/aop/resaloc/tiber_dam.pdf", "document_date": "2022-10-28", "page": 1, "value": "Top of joint use 2993 ft; cumulative storage 918394 AF. Active conservation elevation 2976 ft is recorded separately." }, { "label": "USBR exact lake station and published fill definition", "url": "https://www.usbr.gov/gp-bin/arcweb_ler.pl", "retrieved_at": "2026-10-17", "value": "Daily lake FB and AF, not downstream stage; provider footnote defines percent against total volume. Rounded percent is not used to infer a normal-pool elevation." }, { "label": "USBR published area-capacity table", "url": "https://www.usbr.gov/tsc/techreferences/reservoir/TiberReservoir%28LakeElwell%292021AreaCapacityTables_508.pdf", "document_date": "2022-05", "page": 133, "value": "At 2987.38 ft the published table gives 822173.18 AF; GP daily feed gives 822171 AF." } ], "notes": "Full pool uses USBR’s published top of joint use: 2,993.00 ft / 918,394 AF cumulative total storage. Top of active conservation is separately 2,976.00 ft / 655,956 AF; the joint-use pool is part of the full operating reference. No observed maximum or rounded percent-full correlation is used. Percent-full is not calculated by Gauge. Current GP AF agrees with the published capacity table at the same elevation; the daily percent/full-to-fill denominator may retain an older capacity and is not used." }, "status": "ready", "needs_attention": false, "messages": [], "latest_reading": "2026/10/31", "reading_age_days": 2, "stored_readings": 1838, "first_reading": "2021/10/20", "freshness": "current", "freshness_threshold_days": 2, "fields": { "elevation_available": true, "storage_available": true, "storage_readings": 1787 }, "sync": { "status": "ok", "interval_seconds": 1800, "last_attempt": "2026-11-02T11:30:48.143Z", "last_successful_update": "2026-11-02T11:30:48.143Z", "next_check_at": "2026-11-02T12:00:00.000Z", "consecutive_failures": 0, "in_progress": false }, "backfill": { "status": "complete", "one_year": { "checked_days": 365, "target_days": 365, "complete": true }, "two_years": { "checked_days": 730, "target_days": 730, "complete": true }, "three_years": { "checked_days": 1095, "target_days": 1095, "complete": true }, "five_years": { "checked_days": 1825, "target_days": 1825, "complete": true } } }, { "station": "LFRM", "name": "Lake Frances", "source": "PCCRC", "mode": "periodic_reports", "viewer_url": "/?station=LFRM", "reference": { "status": "references_incomplete", "full_pool_elevation_ft": null, "normal_capacity_af": 110500, "capacity_kind": "NID_normal_storage_active_total_basis_not_reconciled_with_operator", "elevation_status": "historical_FWP_full_pool_current_datum_and_operating_applicability_unverified", "datum": "Operator datum not specified; historical FWP full pool is stated as MSL, with no verified conversion.", "unresolved": [ "Confirm current normal retention elevation/datum and whether the FWP 3815-ft reference remains applicable.", "Obtain current operator elevation-storage curve and reconcile 112000 AF older/NRCS capacity with NID 110500 AF normal; confirm active/total/dead storage basis across operator, NRCS and historic GP feeds.", "Find ongoing dated actual lake FB/AF export from operator; current GP October 2026 probe has no usable values.", "NRCS catalogue longitude differs from the USGS lake gauge coordinates; preserve station identity by exact triplet/name/HUC and do not use generic coordinates or elevations as reference proof." ], "next_source": "Pondera County Canal & Reservoir Company, office@ponderacanalcompany.com, (406) 279-3315; current staff-gauge logs and curve.", "sources": [ { "label": "PCCRC dated lake elevation and storage", "url": "https://ponderacanalcompany.com/operations-and-weather", "retrieved_at": "2026-10-17", "value": "October 8 2026: Frances 3807 ft / 61734 AF. Datum and approval not specified; Swift is a separate lake." }, { "label": "NRCS monthly lake storage", "url": "https://wcc.sc.egov.usda.gov/awdbRestApi/services/v1/data?stationTriplets=06095500%3AMT%3ABOR&elements=RESC&duration=MONTHLY&beginDate=2021-10-01&endDate=2026-10-17&periodRef=END&returnFlags=true&returnOriginalValues=true", "value": "Exact triplet 06095500:MT:BOR, RESC MONTHLY ac_ft. Month is not an exact observation day; provisional flags retained." }, { "label": "FWP historical full-pool description", "url": "https://myfwp.mt.gov/getRepositoryFile?objectID=50646", "value": "Full-pool elevation 3815 ft MSL; maximum volume 112000 AF. Current applicability and datum compatibility unverified." }, { "label": "USACE National Inventory of Dams — Frances East", "url": "https://nid.sec.usace.army.mil/api/dams/MT01125/inventory", "document_date": "2026-10-06", "value": "Normal storage 110500 AF; maximum 133619 AF. East and North structures impound the same lake; do not sum." }, { "label": "USACE National Inventory of Dams — Frances North", "url": "https://nid.sec.usace.army.mil/api/dams/MT01484/inventory", "document_date": "2026-10-06", "value": "Same 110500 AF normal storage for the same impoundment." }, { "label": "USBR historical daily lake archive", "url": "https://data.usbr.gov/catalog/4/item/30", "value": "LFRM lake elevation record ends 2022-02-23T06:00:00Z. Recent queries return missing sentinels; catalogue update is not a new reading." }, { "label": "Town of Valier boat ramps", "url": "https://www.townofvalier.com/parks-and-recreation", "value": "Two PCCRC boat ramps; current low-water usability not verified." }, { "label": "Montana lake boating access", "url": "https://visitmt.com/listing/lake-frances", "value": "Motor boating and launching documented; no current ramp-condition claim." } ], "notes": "Actual paired lake readings are published by PCCRC and checked daily; NRCS monthly storage is retained separately. FWP describes historical full pool as 3815 ft MSL / 112000 AF, while current NID normal storage is 110500 AF. Current normal elevation, vertical datum and storage curves are not reconciled. Offset and percent-full remain unavailable. USBR historic daily observations end in February 2022; no daily current feed is claimed." }, "status": "periodic_report", "needs_attention": false, "messages": [ "Operator page is checked automatically once daily. Successful checks do not change the dated reading or imply daily telemetry.", "Separate NRCS monthly storage is checked automatically once daily. A monthly refresh does not make the dated lake elevation current." ], "latest_reading": "2026/10/30", "reading_age_days": 3, "stored_readings": 3, "first_reading": "2026/10/08", "latest_report_date": "2026-10-30", "freshness": "current", "freshness_threshold_days": 45, "fields": { "elevation_available": true, "storage_available": true, "storage_readings": 3 }, "quality_flags": [], "sync": { "status": "ok", "source_url": "https://ponderacanalcompany.com/operations-and-weather", "interval_seconds": 86400, "last_attempt": "2026-11-02T04:15:43.826Z", "last_successful_update": "2026-11-02T04:15:43.826Z", "next_check_at": "2026-11-03T00:00:00.000Z", "consecutive_failures": 0, "in_progress": false, "error": null }, "backfill": { "status": "not_applicable", "one_year": null, "two_years": null, "three_years": null, "five_years": null }, "monthly_storage": { "source": "NRCS AWDB", "station_triplet": "06095500:MT:BOR", "sampling": "monthly", "units": "acre-feet", "latest": { "period": "2026-09", "af": 61030, "quality_flag": "P", "source_url": "https://wcc.sc.egov.usda.gov/awdbRestApi/services/v1/data?stationTriplets=06095500%3AMT%3ABOR&elements=RESC&duration=MONTHLY&beginDate=2026-07-01&endDate=2026-10-28&periodRef=END&returnFlags=true&returnOriginalValues=true", "observation_date": null }, "series": [ { "period": "2021-11", "af": 57057, "quality_flag": "P", "source_url": "https://wcc.sc.egov.usda.gov/awdbRestApi/services/v1/data?stationTriplets=06095500%3AMT%3ABOR&elements=RESC&duration=MONTHLY&beginDate=2021-10-01&endDate=2026-10-17&periodRef=END&returnFlags=true&returnOriginalValues=true", "observation_date": null }, { "period": "2021-12", "af": 56709, "quality_flag": "P", "source_url": "https://wcc.sc.egov.usda.gov/awdbRestApi/services/v1/data?stationTriplets=06095500%3AMT%3ABOR&elements=RESC&duration=MONTHLY&beginDate=2021-10-01&endDate=2026-10-17&periodRef=END&returnFlags=true&returnOriginalValues=true", "observation_date": null }, { "period": "2022-01", "af": 56490, "quality_flag": "P", "source_url": "https://wcc.sc.egov.usda.gov/awdbRestApi/services/v1/data?stationTriplets=06095500%3AMT%3ABOR&elements=RESC&duration=MONTHLY&beginDate=2021-10-01&endDate=2026-10-17&periodRef=END&returnFlags=true&returnOriginalValues=true", "observation_date": null }, { "period": "2022-02", "af": 57002, "quality_flag": "P", "source_url": "https://wcc.sc.egov.usda.gov/awdbRestApi/services/v1/data?stationTriplets=06095500%3AMT%3ABOR&elements=RESC&duration=MONTHLY&beginDate=2021-10-01&endDate=2026-10-17&periodRef=END&returnFlags=true&returnOriginalValues=true", "observation_date": null }, { "period": "2022-03", "af": 57144, "quality_flag": "P", "source_url": "https://wcc.sc.egov.usda.gov/awdbRestApi/services/v1/data?stationTriplets=06095500%3AMT%3ABOR&elements=RESC&duration=MONTHLY&beginDate=2021-10-01&endDate=2026-10-17&periodRef=END&returnFlags=true&returnOriginalValues=true", "observation_date": null }, { "period": "2022-04", "af": 57800, "quality_flag": "P", "source_url": "https://wcc.sc.egov.usda.gov/awdbRestApi/services/v1/data?stationTriplets=06095500%3AMT%3ABOR&elements=RESC&duration=MONTHLY&beginDate=2021-10-01&endDate=2026-10-17&periodRef=END&returnFlags=true&returnOriginalValues=true", "observation_date": null }, { "period": "2022-05", "af": 48265, "quality_flag": "P", "source_url": "https://wcc.sc.egov.usda.gov/awdbRestApi/services/v1/data?stationTriplets=06095500%3AMT%3ABOR&elements=RESC&duration=MONTHLY&beginDate=2021-10-01&endDate=2026-10-17&periodRef=END&returnFlags=true&returnOriginalValues=true", "observation_date": null }, { "period": "2022-06", "af": 45221, "quality_flag": "P", "source_url": "https://wcc.sc.egov.usda.gov/awdbRestApi/services/v1/data?stationTriplets=06095500%3AMT%3ABOR&elements=RESC&duration=MONTHLY&beginDate=2021-10-01&endDate=2026-10-17&periodRef=END&returnFlags=true&returnOriginalValues=true", "observation_date": null }, { "period": "2022-07", "af": 35639, "quality_flag": "P", "source_url": "https://wcc.sc.egov.usda.gov/awdbRestApi/services/v1/data?stationTriplets=06095500%3AMT%3ABOR&elements=RESC&duration=MONTHLY&beginDate=2021-10-01&endDate=2026-10-17&periodRef=END&returnFlags=true&returnOriginalValues=true", "observation_date": null }, { "period": "2022-08", "af": 33146, "quality_flag": "P", "source_url": "https://wcc.sc.egov.usda.gov/awdbRestApi/services/v1/data?stationTriplets=06095500%3AMT%3ABOR&elements=RESC&duration=MONTHLY&beginDate=2021-10-01&endDate=2026-10-17&periodRef=END&returnFlags=true&returnOriginalValues=true", "observation_date": null }, { "period": "2022-09", "af": 34800, "quality_flag": "P", "source_url": "https://wcc.sc.egov.usda.gov/awdbRestApi/services/v1/data?stationTriplets=06095500%3AMT%3ABOR&elements=RESC&duration=MONTHLY&beginDate=2021-10-01&endDate=2026-10-17&periodRef=END&returnFlags=true&returnOriginalValues=true", "observation_date": null }, { "period": "2022-10", "af": 35363, "quality_flag": "P", "source_url": 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"https://wcc.sc.egov.usda.gov/awdbRestApi/services/v1/data?stationTriplets=06095500%3AMT%3ABOR&elements=RESC&duration=MONTHLY&beginDate=2021-10-01&endDate=2026-10-17&periodRef=END&returnFlags=true&returnOriginalValues=true", "observation_date": null }, { "period": "2026-05", "af": 51951, "quality_flag": "P", "source_url": "https://wcc.sc.egov.usda.gov/awdbRestApi/services/v1/data?stationTriplets=06095500%3AMT%3ABOR&elements=RESC&duration=MONTHLY&beginDate=2021-10-01&endDate=2026-10-17&periodRef=END&returnFlags=true&returnOriginalValues=true", "observation_date": null }, { "period": "2026-06", "af": 64196, "quality_flag": "P", "source_url": "https://wcc.sc.egov.usda.gov/awdbRestApi/services/v1/data?stationTriplets=06095500%3AMT%3ABOR&elements=RESC&duration=MONTHLY&beginDate=2021-10-01&endDate=2026-10-17&periodRef=END&returnFlags=true&returnOriginalValues=true", "observation_date": null }, { "period": "2026-07", "af": 56453, "quality_flag": "P", "source_url": "https://wcc.sc.egov.usda.gov/awdbRestApi/services/v1/data?stationTriplets=06095500%3AMT%3ABOR&elements=RESC&duration=MONTHLY&beginDate=2026-07-01&endDate=2026-10-28&periodRef=END&returnFlags=true&returnOriginalValues=true", "observation_date": null }, { "period": "2026-08", "af": 55770, "quality_flag": "P", "source_url": "https://wcc.sc.egov.usda.gov/awdbRestApi/services/v1/data?stationTriplets=06095500%3AMT%3ABOR&elements=RESC&duration=MONTHLY&beginDate=2026-07-01&endDate=2026-10-28&periodRef=END&returnFlags=true&returnOriginalValues=true", "observation_date": null }, { "period": "2026-09", "af": 61030, "quality_flag": "P", "source_url": "https://wcc.sc.egov.usda.gov/awdbRestApi/services/v1/data?stationTriplets=06095500%3AMT%3ABOR&elements=RESC&duration=MONTHLY&beginDate=2026-07-01&endDate=2026-10-28&periodRef=END&returnFlags=true&returnOriginalValues=true", "observation_date": null } ], "stored_periods": 60, "last_successful_update": "2026-11-02T00:00:56.140Z", "last_attempt": "2026-11-02T00:00:56.140Z", "next_check_at": "2026-11-03T00:00:00.000Z", "sync_error": null, "consecutive_failures": 0, "in_progress": false, "manual_refresh_cooldown_seconds": 900, "notes": "Provider monthly storage periods have no exact observation date or accompanying lake elevation. Storage basis is not reconciled with the dated operator reports; values are kept separate and percent-full is disabled." } }, { "station": "SHER", "name": "Lake Sherburne", "source": "USBR", "mode": "daily_telemetry", "viewer_url": "/?station=SHER", "reference": { "status": "references_verified", "full_pool_elevation_ft": 4788, "normal_capacity_af": 66147, "capacity_kind": "cumulative_total_storage_at_top_of_active_conservation", "elevation_status": "verified_published_top_of_active_conservation_pool", "datum": "USBR native project elevation in feet; allocation and GP Hydromet station basis. No geodetic conversion applied; exact national-datum realization is not established by the allocation chart.", "unresolved": [], "next_source": null, "sources": [ { "label": "USBR reservoir allocation chart", "url": "https://www.usbr.gov/gp/aop/resaloc/sherburne.pdf", "document_date": "2015-08-28", "page": 1, "value": "Top of active conservation 4788 ft; cumulative storage 66147 AF. Active conservation elevation 4788 ft is recorded separately." }, { "label": "USBR exact lake station and published fill definition", "url": "https://www.usbr.gov/gp-bin/arcweb_sher.pl", "retrieved_at": "2026-10-17", "value": "Daily lake FB and AF, not downstream stage; provider footnote defines percent against total volume. Rounded percent is not used to infer a normal-pool elevation." } ], "notes": "Full pool uses USBR’s published top of active conservation: 4,788.00 ft / 66,147 AF cumulative total storage. No observed maximum or rounded percent-full correlation is used. Stored paired readings near the independently published full elevation agree with the allocation capacity within source rounding. Percent-full is not calculated by Gauge." }, "status": "ready", "needs_attention": false, "messages": [], "latest_reading": "2026/10/31", "reading_age_days": 2, "stored_readings": 1838, "first_reading": "2021/10/20", "freshness": "current", "freshness_threshold_days": 2, "fields": { "elevation_available": true, "storage_available": true, "storage_readings": 1838 }, "sync": { "status": "ok", "interval_seconds": 1800, "last_attempt": "2026-11-02T11:30:51.335Z", "last_successful_update": "2026-11-02T11:30:51.335Z", "next_check_at": "2026-11-02T12:00:00.000Z", "consecutive_failures": 0, "in_progress": false }, "backfill": { "status": "complete", "one_year": { "checked_days": 365, "target_days": 365, "complete": true }, "two_years": { "checked_days": 730, "target_days": 730, "complete": true }, "three_years": { "checked_days": 1095, "target_days": 1095, "complete": true }, "five_years": { "checked_days": 1825, "target_days": 1825, "complete": true } } }, { "station": "LIMR", "name": "Lima Reservoir", "source": "USBR", "mode": "daily_telemetry", "viewer_url": "/?station=LIMR", "reference": { "status": "references_incomplete", "full_pool_elevation_ft": null, "normal_capacity_af": 85025, "capacity_kind": "historical_2013_USBR_allocation_full_storage_current_basis_unconfirmed", "elevation_status": "published_2013_reference_current_operating_compatibility_unconfirmed", "datum": "Historical USBR project/MSL elevation; current operational limit and datum relationship need operator confirmation. No conversion applied.", "unresolved": [ "Obtain current authorized/operating full-pool elevation and datum; reconcile 6582.87, 6582.7 and lower reported spill levels.", "Confirm current elevation-storage curve and normal operating capacity, reconciling 85025 versus 84050 AF." ], "next_source": "Red Rock Water Users Association / Montana DNRC Dam Safety / USBR Montana Area Office operational metadata.", "sources": [ { "label": "USBR historical allocation summary", "url": "https://www.usbr.gov/gp/aop/resaloc/mtao_summary_reservoir_allocation_tables.pdf", "document_date": "2013-02-06", "value": "LIMR 6582.87 ft / 85025 AF." }, { "label": "USGS historical capacity", "url": "https://pubs.usgs.gov/wsp/1729/report.pdf", "value": "84050 AF at 6582.7 ft; historical reference, not current confirmation." }, { "label": "USBR operating narrative with conflicting fill/spill level", "url": "https://www.usbr.gov/gp/aop/um/18um.pdf", "document_date": "2018", "page": 37, "value": "Describes filling/spilling with peak 6581.30 ft / 76440 AF; not used as a normal-pool estimate." }, { "label": "USBR current lake observations", "url": "https://www.usbr.gov/gp-bin/arcweb_limr.pl", "retrieved_at": "2026-10-17", "value": "Actual lake FB/AF; no explicit elevation-to-fill; rounded percent is not used to infer the reference." } ], "notes": "The 2013 USBR allocation summary lists 6,582.87 ft / 85,025 AF. Other published references list 6,582.7 ft / 84,050 AF, while the 2016–2018 operating narratives describe filling/spilling at lower elevations. The current daily page does not publish elevation-to-fill. Current normal pool, datum and storage basis are unresolved; the former inferred 6,582.53-ft baseline has been removed. Raw lake observations remain available." }, "status": "ready", "needs_attention": false, "messages": [], "latest_reading": "2026/10/31", "reading_age_days": 2, "stored_readings": 1698, "first_reading": "2021/10/20", "freshness": "current", "freshness_threshold_days": 2, "fields": { "elevation_available": true, "storage_available": true, "storage_readings": 1698 }, "sync": { "status": "ok", "interval_seconds": 1800, "last_attempt": "2026-11-02T11:30:49.024Z", "last_successful_update": "2026-11-02T11:30:49.024Z", "next_check_at": "2026-11-02T12:00:00.000Z", "consecutive_failures": 0, "in_progress": false }, "backfill": { "status": "complete", "one_year": { "checked_days": 365, "target_days": 365, "complete": true }, "two_years": { "checked_days": 730, "target_days": 730, "complete": true }, "three_years": { "checked_days": 1095, "target_days": 1095, "complete": true }, "five_years": { "checked_days": 1825, "target_days": 1825, "complete": true } } }, { "station": "NELR", "name": "Nelson Reservoir", "source": "USBR", "mode": "daily_telemetry", "viewer_url": "/?station=NELR", "reference": { "status": "references_verified", "full_pool_elevation_ft": 2221.6, "normal_capacity_af": 78950, "capacity_kind": "cumulative_total_storage_at_top_of_active_conservation", "elevation_status": "verified_published_top_of_active_conservation_pool", "datum": "USBR native project elevation in feet; allocation and GP Hydromet station basis. No geodetic conversion applied; exact national-datum realization is not established by the allocation chart.", "unresolved": [], "next_source": null, "sources": [ { "label": "USBR reservoir allocation chart", "url": "https://www.usbr.gov/gp/aop/resaloc/nelson.pdf", "document_date": "2013-02-06", "page": 1, "value": "Top of active conservation 2221.6 ft; cumulative storage 78950 AF. Active conservation elevation 2221.6 ft is recorded separately." }, { "label": "USBR exact lake station and published fill definition", "url": "https://www.usbr.gov/gp-bin/arcweb_nelr.pl", "retrieved_at": "2026-10-17", "value": "Daily lake FB and AF, not downstream stage; provider footnote defines percent against total volume. Rounded percent is not used to infer a normal-pool elevation." } ], "notes": "Full pool uses USBR’s published top of active conservation: 2,221.60 ft / 78,950 AF cumulative total storage. No observed maximum or rounded percent-full correlation is used. Percent-full is not calculated by Gauge." }, "status": "ready", "needs_attention": false, "messages": [], "latest_reading": "2026/10/31", "reading_age_days": 2, "stored_readings": 1838, "first_reading": "2021/10/20", "freshness": "current", "freshness_threshold_days": 2, "fields": { "elevation_available": true, "storage_available": true, "storage_readings": 1838 }, "sync": { "status": "ok", "interval_seconds": 1800, "last_attempt": "2026-11-02T11:30:49.209Z", "last_successful_update": "2026-11-02T11:30:49.209Z", "next_check_at": "2026-11-02T12:00:00.000Z", "consecutive_failures": 0, "in_progress": false }, "backfill": { "status": "complete", "one_year": { "checked_days": 365, "target_days": 365, "complete": true }, "two_years": { "checked_days": 730, "target_days": 730, "complete": true }, "three_years": { "checked_days": 1095, "target_days": 1095, "complete": true }, "five_years": { "checked_days": 1825, "target_days": 1825, "complete": true } } }, { "station": "PETR", "name": "Petrolia Reservoir", "source": "DNRC", "mode": "daily_telemetry", "viewer_url": "/?station=PETR", "reference": { "status": "references_incomplete", "full_pool_elevation_ft": null, "normal_capacity_af": 9192, "capacity_kind": "NID_normal_storage_including_dead_and_inactive", "elevation_status": "current_normal_full_pool_not_verified", "datum": "StAGE parameter Lake_Elev_NGVD (realization unspecified)", "unresolved": [ "Obtain the current normal retention/spillway elevation and datum from Petrolia Irrigation District or DNRC Dam Safety.", "Confirm which storage curve and active/total basis DNRC StAGE uses; reconcile the older 8380 AF water-right record." ], "next_source": "Petrolia Irrigation District / DNRC Dam Safety Program: current as-built normal retention elevation and elevation-storage curve.", "sources": [ { "label": "USACE normal capacity", "url": "https://nid.sec.usace.army.mil/api/dams/MT00008/inventory", "document_date": "2026-10-06", "value": "normalStorage 9192 AF; maxStorage 14170 AF; Montana submission 2025-04-23" }, { "label": "Older water-right capacity", "url": "https://ftp.geoinfo.msl.mt.gov/Documents/Water/WaterRights/Abstracts/WRD2090AR__304697__2.pdf", "document_date": "2017-01-24", "page": 1, "value": "8380 AF listed; superseded for inventory context by newer NID record, not assumed compatible with current feed" } ], "notes": "USACE lists 9,192 AF normal storage and 14,170 AF maximum storage. Current normal full-pool elevation and compatibility with the API storage curve remain unverified; offset and percent-full are unavailable." }, "status": "ready", "needs_attention": false, "messages": [], "latest_reading": "2026/11/02", "reading_age_days": 0, "stored_readings": 375, "first_reading": "2025/10/21", "freshness": "current", "freshness_threshold_days": 2, "fields": { "elevation_available": true, "storage_available": true, "storage_readings": 375 }, "sync": { "status": "ok", "interval_seconds": 1800, "last_attempt": "2026-11-02T11:30:49.606Z", "last_successful_update": "2026-11-02T11:30:49.606Z", "next_check_at": "2026-11-02T12:00:00.000Z", "consecutive_failures": 0, "in_progress": false }, "backfill": { "status": "complete", "one_year": { "checked_days": 365, "target_days": 365, "complete": true }, "two_years": { "checked_days": 730, "target_days": 730, "complete": true }, "three_years": { "checked_days": 1095, "target_days": 1095, "complete": true }, "five_years": { "checked_days": 1825, "target_days": 1825, "complete": true } } }, { "station": "PSHR", "name": "Pishkun Reservoir", "source": "USBR", "mode": "daily_telemetry", "viewer_url": "/?station=PSHR", "reference": { "status": "references_verified", "full_pool_elevation_ft": 4370, "normal_capacity_af": 46694, "capacity_kind": "cumulative_total_storage_at_top_of_active_conservation", "elevation_status": "verified_published_top_of_active_conservation_pool", "datum": "USBR native project elevation in feet; allocation and GP Hydromet station basis. No geodetic conversion applied; exact national-datum realization is not established by the allocation chart.", "unresolved": [], "next_source": null, "sources": [ { "label": "USBR reservoir allocation chart", "url": "https://www.usbr.gov/gp/aop/resaloc/pishkun.pdf", "document_date": "2012-10-16", "page": 1, "value": "Top of active conservation 4370 ft; cumulative storage 46694 AF. Active conservation elevation 4370 ft is recorded separately." }, { "label": "USBR exact lake station and published fill definition", "url": "https://www.usbr.gov/gp-bin/arcweb_pshr.pl", "retrieved_at": "2026-10-17", "value": "Daily lake FB and AF, not downstream stage; provider footnote defines percent against total volume. Rounded percent is not used to infer a normal-pool elevation." } ], "notes": "Full pool uses USBR’s published top of active conservation: 4,370.00 ft / 46,694 AF cumulative total storage. No observed maximum or rounded percent-full correlation is used. Stored paired readings near the independently published full elevation agree with the allocation capacity within source rounding. Percent-full is not calculated by Gauge." }, "status": "ready", "needs_attention": false, "messages": [], "latest_reading": "2026/10/31", "reading_age_days": 2, "stored_readings": 2178, "first_reading": "2020/11/14", "freshness": "current", "freshness_threshold_days": 2, "fields": { "elevation_available": true, "storage_available": true, "storage_readings": 2178 }, "sync": { "status": "ok", "interval_seconds": 1800, "last_attempt": "2026-11-02T11:30:50.217Z", "last_successful_update": "2026-11-02T11:30:50.217Z", "next_check_at": "2026-11-02T12:00:00.000Z", "consecutive_failures": 0, "in_progress": false }, "backfill": { "status": "complete", "one_year": { "checked_days": 365, "target_days": 365, "complete": true }, "two_years": { "checked_days": 730, "target_days": 730, "complete": true }, "three_years": { "checked_days": 1095, "target_days": 1095, "complete": true }, "five_years": { "checked_days": 1825, "target_days": 1825, "complete": true } } }, { "station": "RUBR", "name": "Ruby Reservoir", "source": "DNRC", "mode": "daily_telemetry", "viewer_url": "/?station=RUBR", "reference": { "status": "references_incomplete", "full_pool_elevation_ft": null, "normal_capacity_af": 37612, "capacity_kind": "DNRC_2026_full_pool_total_including_dead_storage", "elevation_status": "current_normal_full_pool_not_verified", "datum": "StAGE Lake_Elev_NGVD (realization unspecified); monthly operator report uses local project datum.", "unresolved": [ "Verify current normal full-pool/spillway elevation, vertical datum, and whether 5393 ft in generic StAGE site metadata is the intended normal reference.", "Reconcile 37612 AF in monthly operations reports with 37642 AF in the 2021 fact sheet and confirm the current storage curve.", "Request DNRC review of the abrupt May 1–2, 2026 provisional archive change (5333.354 to 5392.999 ft)." ], "next_source": "DNRC State Water Projects / Ruby Water Users Association: current as-built normal retention elevation, O&M elevation-storage table and provisional observation review.", "sources": [ { "label": "DNRC lake measurements", "url": "https://gis.dnrc.mt.gov/apps/stage/gage-report/location/f26fd2ce9c964607890fb2990b8cf4fd", "value": "Actual Lake_Elev_NGVD lake elevation (ft) and Total Storage (Acre-ft); provisional. Exact sensor IDs recorded in reference metadata." }, { "label": "DNRC project fact sheet", "url": "https://dnrc.mt.gov/_docs/water/State_Water_Projects/Rehab/Project_Fact_Sheets/Ruby-Fact-Sheet-210913.pdf", "document_date": "2021-09", "page": 1, "value": "37642 AF at full pool, versus 37612 AF full capacity in the 2026 monthly report." }, { "label": "DNRC operations report", "url": "https://dnrc.mt.gov/_docs/water/State_Water_Projects/Rehab/Monthly_Storage_Spreadsheets/20260430MonthlyContentsReport.pdf", "document_date": "2026-04-30", "page": 1, "value": "Full capacity and paired reading date/elevation/storage; elevations in local project datum; total contents include dead storage." }, { "label": "DNRC water-right abstract", "url": "https://wrqsproxy.dnrc.mt.gov/Report?/WRQS/WRD2090AR&P_WRGT_ID_SEQ=208383&P_VERS_ID_SEQ=1&rs:Command=Render&rs:Format=PDF", "retrieved_at": "2026-10-17", "value": "41C 119390-00 storage right; no verified full-pool elevation recovered." }, { "label": "DNRC updated project report", "url": "https://dnrc.mt.gov/_docs/water/State_Water_Projects/SWPB-Projects-Report-2024.pdf", "document_date": "2024-10", "page": 37, "value": "Updated project fact sheet reviewed; capacities corroborate earlier documentation, with existing active/total or report conflicts retained. No new normal-pool elevation is stated." } ], "notes": "Latest DNRC monthly report lists 37,612 AF full capacity; the 2021 fact sheet instead lists 37,642 AF. Their 30 AF discrepancy needs reconciliation. Generic StAGE location elevation 5,393 ft is not an explicit full-pool reference, so offset and percent-full are unavailable. The provisional archive also contains an abrupt elevation change around May 1–2, 2026; source values are preserved for review. The October 2024 DNRC project report repeats 37,642 AF, so the conflict with the monthly report’s 37,612 AF is still unresolved." }, "status": "ready", "needs_attention": false, "messages": [], "latest_reading": "2026/11/01", "reading_age_days": 1, "stored_readings": 661, "first_reading": "2024/12/10", "freshness": "current", "freshness_threshold_days": 2, "fields": { "elevation_available": true, "storage_available": true, "storage_readings": 660 }, "sync": { "status": "ok", "interval_seconds": 1800, "last_attempt": "2026-11-02T11:30:50.346Z", "last_successful_update": "2026-11-02T11:30:50.346Z", "next_check_at": "2026-11-02T12:00:00.000Z", "consecutive_failures": 0, "in_progress": false }, "backfill": { "status": "complete", "one_year": { "checked_days": 365, "target_days": 365, "complete": true }, "two_years": { "checked_days": 730, "target_days": 730, "complete": true }, "three_years": { "checked_days": 1095, "target_days": 1095, "complete": true }, "five_years": { "checked_days": 1825, "target_days": 1825, "complete": true } } }, { "station": "TRR", "name": "Tongue River Reservoir", "source": "DNRC", "mode": "daily_telemetry", "viewer_url": "/?station=TRR", "reference": { "status": "references_verified", "full_pool_elevation_ft": 3428.4, "normal_capacity_af": 79071, "capacity_kind": "normal_full_pool_total_including_dead_storage", "elevation_status": "verified_published_normal_pool_with_operator_crosscheck", "datum": "3428.4 ft MSL in EPA/DNRC engineering report; StAGE Lake_Elev_NGVD (realization unspecified). Dated operator elevation/storage pair agrees with the lake feed.", "unresolved": [], "next_source": null, "sources": [ { "label": "DNRC lake measurements", "url": "https://gis.dnrc.mt.gov/apps/stage/gage-report/location/3f087fe86bde421f857dfedff4e40e93", "value": "Actual Lake_Elev_NGVD lake elevation (ft) and Total Storage (Acre-ft); provisional. Exact sensor IDs recorded in reference metadata." }, { "label": "DNRC project fact sheet", "url": "https://dnrc.mt.gov/_docs/water/State_Water_Projects/Rehab/Project_Fact_Sheets/Tongue-River-Fact-Sheet-210913.pdf", "document_date": "2021-09", "page": 1, "value": "79071 AF at normal full pool after the 1999 rehabilitation." }, { "label": "DNRC operations report", "url": "https://dnrc.mt.gov/_docs/water/State_Water_Projects/Rehab/Monthly_Storage_Spreadsheets/20260430MonthlyContentsReport.pdf", "document_date": "2026-04-30", "page": 1, "value": "Full capacity and paired reading date/elevation/storage; elevations in local project datum; total contents include dead storage." }, { "label": "EPA/DNRC elevation and capacity reference", "url": "https://nepis.epa.gov/Exe/ZyPURL.cgi?Dockey=P1017C0S.txt", "document_date": "2007-06-25", "page": 16, "value": "Primary labyrinth spillway 3428.4 ft MSL corresponds to 79071 AF; emergency spillway 3431.5 ft corresponds to 91107 AF. Based on DNRC operator and bathymetric data." }, { "label": "DNRC water-right abstract", "url": "https://wrqsproxy.dnrc.mt.gov/Report?/WRQS/WRD2090AR&P_WRGT_ID_SEQ=208290&P_VERS_ID_SEQ=3&rs:Command=Render&rs:Format=PDF", "retrieved_at": "2026-10-17", "value": "42B 119280-00 version 3: current capacity 79071 AF after 1999; 72500 AF is original capacity and the right’s annual storage limit, not current normal full capacity." }, { "label": "DNRC updated project report", "url": "https://dnrc.mt.gov/_docs/water/State_Water_Projects/SWPB-Projects-Report-2024.pdf", "document_date": "2024-10", "page": 39, "value": "Updated project fact sheet reviewed; capacities corroborate earlier documentation, with existing active/total or report conflicts retained. No new normal-pool elevation is stated." } ], "notes": "Normal pool is 3,428.4 ft and 79,071 AF total, including 711 AF dead storage. The 2007 EPA/DNRC engineering report ties this primary spillway elevation to that capacity; 2021 DNRC normal-pool capacity and 2026 operating report corroborate it. April 30, 2026 lake telemetry agrees with the operator report in elevation and total storage. Emergency spillway elevation 3,431.5 ft is not normal pool." }, "status": "ready", "needs_attention": false, "messages": [], "latest_reading": "2026/11/01", "reading_age_days": 1, "stored_readings": 1578, "first_reading": "2021/10/20", "freshness": "current", "freshness_threshold_days": 2, "fields": { "elevation_available": true, "storage_available": true, "storage_readings": 1578 }, "sync": { "status": "ok", "interval_seconds": 1800, "last_attempt": "2026-11-02T11:30:52.794Z", "last_successful_update": "2026-11-02T11:30:52.794Z", "next_check_at": "2026-11-02T12:00:00.000Z", "consecutive_failures": 0, "in_progress": false }, "backfill": { "status": "complete", "one_year": { "checked_days": 365, "target_days": 365, "complete": true }, "two_years": { "checked_days": 730, "target_days": 730, "complete": true }, "three_years": { "checked_days": 1095, "target_days": 1095, "complete": true }, "five_years": { "checked_days": 1825, "target_days": 1825, "complete": true } } }, { "station": "WCR", "name": "Willow Creek Reservoir (MT)", "source": "USBR", "mode": "daily_telemetry", "viewer_url": "/?station=WCR", "reference": { "status": "references_verified", "full_pool_elevation_ft": 4142, "normal_capacity_af": 31852, "capacity_kind": "cumulative_total_storage_at_top_of_active_conservation", "elevation_status": "verified_published_top_of_active_conservation_pool", "datum": "USBR native project elevation in feet; allocation and GP Hydromet station basis. No geodetic conversion applied; exact national-datum realization is not established by the allocation chart.", "unresolved": [], "next_source": null, "sources": [ { "label": "USBR reservoir allocation chart", "url": "https://www.usbr.gov/gp/aop/resaloc/willow_creek.pdf", "document_date": "2021-12-08", "page": 1, "value": "Top of active conservation 4142 ft; cumulative storage 31852 AF. Active conservation elevation 4142 ft is recorded separately." }, { "label": "USBR exact lake station and published fill definition", "url": "https://www.usbr.gov/gp-bin/arcweb_wcr.pl", "retrieved_at": "2026-10-17", "value": "Daily lake FB and AF, not downstream stage; provider footnote defines percent against total volume. Rounded percent is not used to infer a normal-pool elevation." } ], "notes": "Full pool uses USBR’s published top of active conservation: 4,142.00 ft / 31,852 AF cumulative total storage. No observed maximum or rounded percent-full correlation is used. The 2021 chart updates the old 31,848 AF capacity to 31,852 AF; 4,144-ft spillway and 4,147-ft surcharge are separate from normal pool. Percent-full is not calculated by Gauge." }, "status": "ready", "needs_attention": false, "messages": [], "latest_reading": "2026/10/31", "reading_age_days": 2, "stored_readings": 1838, "first_reading": "2021/10/20", "freshness": "current", "freshness_threshold_days": 2, "fields": { "elevation_available": true, "storage_available": true, "storage_readings": 1838 }, "sync": { "status": "ok", "interval_seconds": 1800, "last_attempt": "2026-11-02T11:30:58.455Z", "last_successful_update": "2026-11-02T11:30:58.455Z", "next_check_at": "2026-11-02T12:00:00.000Z", "consecutive_failures": 0, "in_progress": false }, "backfill": { "status": "complete", "one_year": { "checked_days": 365, "target_days": 365, "complete": true }, "two_years": { "checked_days": 730, "target_days": 730, "complete": true }, "three_years": { "checked_days": 1095, "target_days": 1095, "complete": true }, "five_years": { "checked_days": 1825, "target_days": 1825, "complete": true } } } ] }