{ "dataset": "Montana lake-type waterbodies reported to EPA ATTAINS", "scope": "Every lake-type assessment unit Montana reports, not only those with a page on plainlakes.com.", "state": { "code": "MT", "name": "Montana", "url": "https://plainlakes.com/state/montana/" }, "reporting_cycles": "1990–2024", "count": 73, "sources": [ { "source": "EPA ATTAINS", "vintage": "Reporting cycles 1987–2026" }, { "source": "USGS National Water Information System", "vintage": "Trailing 365 days, through 2026-08-16" } ], "license": "https://plainlakes.com/terms/", "attribution": "PlainLakes (plainlakes.com), compiled from EPA ATTAINS and USGS NWIS", "disclaimer": "Assessment verdicts are the decisions of the state agency or tribal nation that filed them, as published to EPA ATTAINS, and are reproduced without modification. PlainLakes is not affiliated with the federal government.", "waterbodies": [ { "assessment_unit_id": "MT40E004_010", "name": "Fort Peck Reservoir", "water_type": "Lake, Freshwater", "size": { "value": 233295.8, "units": "Acres" }, "overall_status": "Not Supporting", "epa_ir_category": "5", "cycle_last_assessed": "2012", "integrated_report": { "status": "Organization Final Action - Submittal", "cycle": "2024", "decided_in_open_cycle": false }, "trophic_status": "Mesotrophic", "designated_uses": { "fish_consumption": { "status": null, "ruled_on": null, "threatened": null }, "recreation": { "status": "Fully Supporting", "ruled_on": [ "Primary Contact Recreation" ], "threatened": null }, "aquatic_life": { "status": "Not Supporting", "ruled_on": [ "Aquatic Life" ], "threatened": null }, "drinking_water": { "status": "Not Supporting", "ruled_on": [ "Drinking Water" ], "threatened": null } }, "listed_causes": 2, "uses_assessed": 3, "uses_assessed_filed_by_epa": 0, "listed_causes_filed_by_epa": 0, "usgs_gauge_site_no": null, "url": "https://plainlakes.com/lake/fort-peck-reservoir-mt/" }, { "assessment_unit_id": "MT76O003_010", "name": "Flathead Lake", "water_type": "Lake, Freshwater", "size": { "value": 57305, "units": "Acres" }, "overall_status": "Not Supporting", "epa_ir_category": "5", "cycle_last_assessed": "2016", "integrated_report": { "status": "Organization Final Action - Submittal", "cycle": "2024", "decided_in_open_cycle": false }, "trophic_status": "Oligotrophic", "designated_uses": { "fish_consumption": { "status": null, "ruled_on": null, "threatened": null }, "recreation": { "status": "Fully Supporting", "ruled_on": [ "Primary Contact Recreation" ], "threatened": null }, "aquatic_life": { "status": "Not Supporting", "ruled_on": [ "Aquatic Life" ], "threatened": null }, "drinking_water": { "status": "Fully Supporting", "ruled_on": [ "Drinking Water" ], "threatened": null } }, "listed_causes": 4, "uses_assessed": 4, "uses_assessed_filed_by_epa": 0, "listed_causes_filed_by_epa": 0, "usgs_gauge_site_no": "12371550", "url": "https://plainlakes.com/lake/flathead-lake-mt/" }, { "assessment_unit_id": "MT41I003_010", "name": "Canyon Ferry Reservoir", "water_type": "Lake, Freshwater", "size": { "value": 32810, "units": "Acres" }, "overall_status": "Not Supporting", "epa_ir_category": "5", "cycle_last_assessed": "2024", "integrated_report": { "status": "Organization Final Action - Submittal", "cycle": "2024", "decided_in_open_cycle": false }, "trophic_status": "Mesotrophic", "designated_uses": { "fish_consumption": { "status": null, "ruled_on": null, "threatened": null }, "recreation": { "status": "Not Supporting", "ruled_on": [ "Primary Contact Recreation" ], "threatened": null }, "aquatic_life": { "status": "Not Supporting", "ruled_on": [ "Aquatic Life" ], "threatened": null }, "drinking_water": { "status": "Not Supporting", "ruled_on": [ "Drinking Water" ], "threatened": null } }, "listed_causes": 5, "uses_assessed": 4, "uses_assessed_filed_by_epa": 0, "listed_causes_filed_by_epa": 0, "usgs_gauge_site_no": null, "url": "https://plainlakes.com/lake/canyon-ferry-reservoir-mt/" }, { "assessment_unit_id": "MT76D003_010", "name": "Lake Koocanusa", "water_type": "Lake, Freshwater", "size": { "value": 28874.5, "units": "Acres" }, "overall_status": "Not Supporting", "epa_ir_category": "5", "cycle_last_assessed": "2024", "integrated_report": { "status": "Organization Final Action - Submittal", "cycle": "2024", "decided_in_open_cycle": false }, "trophic_status": "Oligotrophic", "designated_uses": { "fish_consumption": { "status": null, "ruled_on": null, "threatened": null }, "recreation": { "status": "Fully Supporting", "ruled_on": [ "Primary Contact Recreation" ], "threatened": null }, "aquatic_life": { "status": "Not Supporting", "ruled_on": [ "Aquatic Life" ], "threatened": null }, "drinking_water": { "status": "Fully Supporting", "ruled_on": [ "Drinking Water" ], "threatened": null } }, "listed_causes": 2, "uses_assessed": 4, "uses_assessed_filed_by_epa": 0, "listed_causes_filed_by_epa": 0, "usgs_gauge_site_no": null, "url": "https://plainlakes.com/lake/lake-koocanusa-mt/" }, { "assessment_unit_id": "MT76J002_010", "name": "Hungry Horse Reservoir", "water_type": "Lake, Freshwater", "size": { "value": 23595.6, "units": "Acres" }, "overall_status": "Fully Supporting", "epa_ir_category": "1", "cycle_last_assessed": "2006", "integrated_report": { "status": "Organization Final Action - Submittal", "cycle": "2024", "decided_in_open_cycle": false }, "trophic_status": "Oligotrophic", "designated_uses": { "fish_consumption": { "status": null, "ruled_on": null, "threatened": null }, "recreation": { "status": "Fully Supporting", "ruled_on": [ "Primary Contact Recreation" ], "threatened": null }, "aquatic_life": { "status": "Fully Supporting", "ruled_on": [ "Aquatic Life" ], "threatened": null }, "drinking_water": { "status": "Fully Supporting", "ruled_on": [ "Drinking Water" ], "threatened": null } }, "listed_causes": 0, "uses_assessed": 4, "uses_assessed_filed_by_epa": 0, "listed_causes_filed_by_epa": 0, "usgs_gauge_site_no": "12362000", "url": "https://plainlakes.com/lake/hungry-horse-reservoir-mt/" }, { "assessment_unit_id": "MT41P003_010", "name": "Lake Elwell (Tiber Reservoir)", "water_type": "Lake, Freshwater", "size": { "value": 15041.3, "units": "Acres" }, "overall_status": "Fully Supporting", "epa_ir_category": "1", "cycle_last_assessed": "2006", "integrated_report": { "status": "Organization Final Action - Submittal", "cycle": "2024", "decided_in_open_cycle": false }, "trophic_status": "Oligotrophic", "designated_uses": { "fish_consumption": { "status": null, "ruled_on": null, "threatened": null }, "recreation": { "status": "Fully Supporting", "ruled_on": [ "Primary Contact Recreation" ], "threatened": null }, "aquatic_life": { "status": "Fully Supporting", "ruled_on": [ "Aquatic Life" ], "threatened": null }, "drinking_water": { "status": "Fully Supporting", "ruled_on": [ "Drinking Water" ], "threatened": null } }, "listed_causes": 0, "uses_assessed": 4, "uses_assessed_filed_by_epa": 0, "listed_causes_filed_by_epa": 0, "usgs_gauge_site_no": null, "url": "https://plainlakes.com/lake/lake-elwell-tiber-reservoir-mt/" }, { "assessment_unit_id": "MT41F005_010", "name": "Hebgen Lake", "water_type": "Lake, Freshwater", "size": { "value": 12407, "units": "Acres" }, "overall_status": "Not Assessed", "epa_ir_category": "3", "cycle_last_assessed": "2000", "integrated_report": { "status": "Organization Final Action - Submittal", "cycle": "2024", "decided_in_open_cycle": false }, "trophic_status": "Mesotrophic", "designated_uses": { "fish_consumption": { "status": null, "ruled_on": null, "threatened": null }, "recreation": { "status": null, "ruled_on": null, "threatened": null }, "aquatic_life": { "status": null, "ruled_on": null, "threatened": null }, "drinking_water": { "status": null, "ruled_on": null, "threatened": null } }, "listed_causes": 0, "uses_assessed": 0, "uses_assessed_filed_by_epa": 0, "listed_causes_filed_by_epa": 0, "usgs_gauge_site_no": "06038000", "url": "https://plainlakes.com/lake/hebgen-lake-mt/" }, { "assessment_unit_id": "MT40R003_010", "name": "Medicine Lake", "water_type": "Lake, Freshwater", "size": { "value": 9726.1, "units": "Acres" }, "overall_status": "Not Supporting", "epa_ir_category": "5", "cycle_last_assessed": "2006", "integrated_report": { "status": "Organization Final Action - Submittal", "cycle": "2024", "decided_in_open_cycle": false }, "trophic_status": "Eutrophic", "designated_uses": { "fish_consumption": { "status": null, "ruled_on": null, "threatened": null }, "recreation": { "status": "Fully Supporting", "ruled_on": [ "Primary Contact Recreation" ], "threatened": null }, "aquatic_life": { "status": "Not Supporting", "ruled_on": [ "Aquatic Life" ], "threatened": null }, "drinking_water": { "status": null, "ruled_on": null, "threatened": null } }, "listed_causes": 3, "uses_assessed": 2, "uses_assessed_filed_by_epa": 0, "listed_causes_filed_by_epa": 0, "usgs_gauge_site_no": null, "url": "https://plainlakes.com/lake/medicine-lake-mt/" }, { "assessment_unit_id": "MT76N002_010", "name": "Noxon Reservoir", "water_type": "Lake, Freshwater", "size": { "value": 7848.4, "units": "Acres" }, "overall_status": "Fully Supporting", "epa_ir_category": "1", "cycle_last_assessed": "2004", "integrated_report": { "status": "Organization Final Action - Submittal", "cycle": "2024", "decided_in_open_cycle": false }, "trophic_status": "Unknown", "designated_uses": { "fish_consumption": { "status": null, "ruled_on": null, "threatened": null }, "recreation": { "status": "Fully Supporting", "ruled_on": [ "Primary Contact Recreation" ], "threatened": null }, "aquatic_life": { "status": "Fully Supporting", "ruled_on": [ "Aquatic Life" ], "threatened": null }, "drinking_water": { "status": "Fully Supporting", "ruled_on": [ "Drinking Water" ], "threatened": null } }, "listed_causes": 0, "uses_assessed": 4, "uses_assessed_filed_by_epa": 0, "listed_causes_filed_by_epa": 0, "usgs_gauge_site_no": null, "url": "https://plainlakes.com/lake/noxon-reservoir-mt/" }, { "assessment_unit_id": "MT41Q005_020", "name": "Benton Lake", "water_type": "Lake, Freshwater", "size": { "value": 5345.1, "units": "Acres" }, "overall_status": "Not Supporting", "epa_ir_category": "5", "cycle_last_assessed": "2000", "integrated_report": { "status": "Organization Final Action - Submittal", "cycle": "2024", "decided_in_open_cycle": false }, "trophic_status": "Eutrophic", "designated_uses": { "fish_consumption": { "status": null, "ruled_on": null, "threatened": null }, "recreation": { "status": "Not Supporting", "ruled_on": [ "Primary Contact Recreation" ], "threatened": null }, "aquatic_life": { "status": "Not Supporting", "ruled_on": [ "Aquatic Life" ], "threatened": null }, "drinking_water": { "status": "Not Supporting", "ruled_on": [ "Drinking Water" ], "threatened": null } }, "listed_causes": 5, "uses_assessed": 4, "uses_assessed_filed_by_epa": 0, "listed_causes_filed_by_epa": 0, "usgs_gauge_site_no": null, "url": "https://plainlakes.com/lake/benton-lake-mt/" }, { "assessment_unit_id": "MT41P003_020", "name": "Lake Frances (Francis)", "water_type": "Lake, Freshwater", "size": { "value": 5251.7, "units": "Acres" }, "overall_status": "Fully Supporting", "epa_ir_category": "1", "cycle_last_assessed": "2006", "integrated_report": { "status": "Organization Final Action - Submittal", "cycle": "2024", "decided_in_open_cycle": false }, "trophic_status": "Mesotrophic", "designated_uses": { "fish_consumption": { "status": null, "ruled_on": null, "threatened": null }, "recreation": { "status": "Fully Supporting", "ruled_on": [ "Primary Contact Recreation" ], "threatened": null }, "aquatic_life": { "status": "Fully Supporting", "ruled_on": [ "Aquatic Life" ], "threatened": null }, "drinking_water": { "status": "Fully Supporting", "ruled_on": [ "Drinking Water" ], "threatened": null } }, "listed_causes": 0, "uses_assessed": 4, "uses_assessed_filed_by_epa": 0, "listed_causes_filed_by_epa": 0, "usgs_gauge_site_no": null, "url": "https://plainlakes.com/lake/lake-frances-francis-mt/" }, { "assessment_unit_id": "MT40F005_010", "name": "Fresno Reservoir", "water_type": "Lake, Freshwater", "size": { "value": 5007, "units": "Acres" }, "overall_status": "Not Supporting", "epa_ir_category": "4C", "cycle_last_assessed": "2000", "integrated_report": { "status": "Organization Final Action - Submittal", "cycle": "2024", "decided_in_open_cycle": false }, "trophic_status": "Unknown", "designated_uses": { "fish_consumption": { "status": null, "ruled_on": null, "threatened": null }, "recreation": { "status": null, "ruled_on": null, "threatened": null }, "aquatic_life": { "status": "Not Supporting", "ruled_on": [ "Aquatic Life" ], "threatened": null }, "drinking_water": { "status": null, "ruled_on": null, "threatened": null } }, "listed_causes": 2, "uses_assessed": 2, "uses_assessed_filed_by_epa": 0, "listed_causes_filed_by_epa": 0, "usgs_gauge_site_no": null, "url": "https://plainlakes.com/lake/fresno-reservoir-mt/" }, { "assessment_unit_id": "MT41A002_010", "name": "Clark Canyon Reservoir", "water_type": "Lake, Freshwater", "size": { "value": 4922.1, "units": "Acres" }, "overall_status": "Not Supporting", "epa_ir_category": "4C", "cycle_last_assessed": "2024", "integrated_report": { "status": "Organization Final Action - Submittal", "cycle": "2024", "decided_in_open_cycle": false }, "trophic_status": "Mesotrophic", "designated_uses": { "fish_consumption": { "status": null, "ruled_on": null, "threatened": null }, "recreation": { "status": null, "ruled_on": null, "threatened": null }, "aquatic_life": { "status": "Not Supporting", "ruled_on": [ "Aquatic Life" ], "threatened": null }, "drinking_water": { "status": "Fully Supporting", "ruled_on": [ "Drinking Water" ], "threatened": null } }, "listed_causes": 1, "uses_assessed": 3, "uses_assessed_filed_by_epa": 0, "listed_causes_filed_by_epa": 0, "usgs_gauge_site_no": null, "url": "https://plainlakes.com/lake/clark-canyon-reservoir-mt/" }, { "assessment_unit_id": "MT41I007_020", "name": "Holter Lake", "water_type": "Lake, Freshwater", "size": { "value": 4358, "units": "Acres" }, "overall_status": "Not Supporting", "epa_ir_category": "5", "cycle_last_assessed": "2000", "integrated_report": { "status": "Organization Final Action - Submittal", "cycle": "2024", "decided_in_open_cycle": false }, "trophic_status": "Oligotrophic", "designated_uses": { "fish_consumption": { "status": null, "ruled_on": null, "threatened": null }, "recreation": { "status": null, "ruled_on": null, "threatened": null }, "aquatic_life": { "status": "Not Supporting", "ruled_on": [ "Aquatic Life" ], "threatened": null }, "drinking_water": { "status": null, "ruled_on": null, "threatened": null } }, "listed_causes": 1, "uses_assessed": 1, "uses_assessed_filed_by_epa": 0, "listed_causes_filed_by_epa": 0, "usgs_gauge_site_no": null, "url": "https://plainlakes.com/lake/holter-lake-mt/" }, { "assessment_unit_id": "MT40M003_020", "name": "Nelson Reservoir", "water_type": "Lake, Freshwater", "size": { "value": 4112.5, "units": "Acres" }, "overall_status": "Not Supporting", "epa_ir_category": "5", "cycle_last_assessed": "2000", "integrated_report": { "status": "Organization Final Action - Submittal", "cycle": "2024", "decided_in_open_cycle": false }, "trophic_status": "Unknown", "designated_uses": { "fish_consumption": { "status": null, "ruled_on": null, "threatened": null }, "recreation": { "status": "Not Supporting", "ruled_on": [ "Primary Contact Recreation" ], "threatened": null }, "aquatic_life": { "status": "Not Supporting", "ruled_on": [ "Aquatic Life" ], "threatened": null }, "drinking_water": { "status": null, "ruled_on": null, "threatened": null } }, "listed_causes": 2, "uses_assessed": 3, "uses_assessed_filed_by_epa": 0, "listed_causes_filed_by_epa": 0, "usgs_gauge_site_no": null, "url": "https://plainlakes.com/lake/nelson-reservoir-mt/" }, { "assessment_unit_id": "MT40M003_010", "name": "Lake Bowdoin", "water_type": "Lake, Freshwater", "size": { "value": 3932.2, "units": "Acres" }, "overall_status": "Not Supporting", "epa_ir_category": "5", "cycle_last_assessed": "2000", "integrated_report": { "status": "Organization Final Action - Submittal", "cycle": "2024", "decided_in_open_cycle": false }, "trophic_status": "Eutrophic", "designated_uses": { "fish_consumption": { "status": null, "ruled_on": null, "threatened": null }, "recreation": { "status": null, "ruled_on": null, "threatened": null }, "aquatic_life": { "status": "Not Supporting", "ruled_on": [ "Aquatic Life" ], "threatened": null }, "drinking_water": { "status": "Not Supporting", "ruled_on": [ "Drinking Water" ], "threatened": null } }, "listed_causes": 2, "uses_assessed": 3, "uses_assessed_filed_by_epa": 0, "listed_causes_filed_by_epa": 0, "usgs_gauge_site_no": null, "url": "https://plainlakes.com/lake/lake-bowdoin-mt/" }, { "assessment_unit_id": "MT41F005_030", "name": "Ennis Lake", "water_type": "Lake, Freshwater", "size": { "value": 3757.8, "units": "Acres" }, "overall_status": "Not Supporting", "epa_ir_category": "5", "cycle_last_assessed": "2016", "integrated_report": { "status": "Organization Final Action - Submittal", "cycle": "2024", "decided_in_open_cycle": false }, "trophic_status": "Unknown", "designated_uses": { "fish_consumption": { "status": null, "ruled_on": null, "threatened": null }, "recreation": { "status": null, "ruled_on": null, "threatened": null }, "aquatic_life": { "status": "Not Supporting", "ruled_on": [ "Aquatic Life" ], "threatened": null }, "drinking_water": { "status": "Not Supporting", "ruled_on": [ "Drinking Water" ], "threatened": null } }, "listed_causes": 4, "uses_assessed": 2, "uses_assessed_filed_by_epa": 0, "listed_causes_filed_by_epa": 0, "usgs_gauge_site_no": null, "url": "https://plainlakes.com/lake/ennis-lake-mt/" }, { "assessment_unit_id": "MT76P004_010", "name": "Whitefish Lake", "water_type": "Lake, Freshwater", "size": { "value": 3317.4, "units": "Acres" }, "overall_status": "Not Supporting", "epa_ir_category": "5", "cycle_last_assessed": "2016", "integrated_report": { "status": "Organization Final Action - Submittal", "cycle": "2024", "decided_in_open_cycle": false }, "trophic_status": "Oligotrophic", "designated_uses": { "fish_consumption": { "status": null, "ruled_on": null, "threatened": null }, "recreation": { "status": "Fully Supporting", "ruled_on": [ "Primary Contact Recreation" ], "threatened": null }, "aquatic_life": { "status": "Fully Supporting", "ruled_on": [ "Aquatic Life" ], "threatened": [ "Aquatic Life" ] }, "drinking_water": { "status": null, "ruled_on": null, "threatened": null } }, "listed_causes": 2, "uses_assessed": 3, "uses_assessed_filed_by_epa": 0, "listed_causes_filed_by_epa": 0, "usgs_gauge_site_no": null, "url": "https://plainlakes.com/lake/whitefish-lake-mt/" }, { "assessment_unit_id": "MT76K002_010", "name": "Swan Lake", "water_type": "Lake, Freshwater", "size": { "value": 3273.6, "units": "Acres" }, "overall_status": "Not Supporting", "epa_ir_category": "4A", "cycle_last_assessed": "2000", "integrated_report": { "status": "Organization Final Action - Submittal", "cycle": "2024", "decided_in_open_cycle": false }, "trophic_status": "Oligotrophic", "designated_uses": { "fish_consumption": { "status": null, "ruled_on": null, "threatened": null }, "recreation": { "status": "Fully Supporting", "ruled_on": [ "Primary Contact Recreation" ], "threatened": null }, "aquatic_life": { "status": "Fully Supporting", "ruled_on": [ "Aquatic Life" ], "threatened": [ "Aquatic Life" ] }, "drinking_water": { "status": "Fully Supporting", "ruled_on": [ "Drinking Water" ], "threatened": null } }, "listed_causes": 4, "uses_assessed": 4, "uses_assessed_filed_by_epa": 0, "listed_causes_filed_by_epa": 0, "usgs_gauge_site_no": null, "url": "https://plainlakes.com/lake/swan-lake-mt/" }, { "assessment_unit_id": "MT41I007_040", "name": "Hauser Lake", "water_type": "Lake, Freshwater", "size": { "value": 3190, "units": "Acres" }, "overall_status": "Not Supporting", "epa_ir_category": "5", "cycle_last_assessed": "2000", "integrated_report": { "status": "Organization Final Action - Submittal", "cycle": "2024", "decided_in_open_cycle": false }, "trophic_status": "Mesotrophic", "designated_uses": { "fish_consumption": { "status": null, "ruled_on": null, "threatened": null }, "recreation": { "status": "Fully Supporting", "ruled_on": [ "Primary Contact Recreation" ], "threatened": null }, "aquatic_life": { "status": "Not Supporting", "ruled_on": [ "Aquatic Life" ], "threatened": null }, "drinking_water": { "status": "Not Supporting", "ruled_on": [ "Drinking Water" ], "threatened": null } }, "listed_causes": 8, "uses_assessed": 3, "uses_assessed_filed_by_epa": 0, "listed_causes_filed_by_epa": 0, "usgs_gauge_site_no": null, "url": "https://plainlakes.com/lake/hauser-lake-mt/" }, { "assessment_unit_id": "MT41K004_030", "name": "Freezeout Lake", "water_type": "Lake, Freshwater", "size": { "value": 3013.2, "units": "Acres" }, "overall_status": "Not Supporting", "epa_ir_category": "5", "cycle_last_assessed": "2000", "integrated_report": { "status": "Organization Final Action - Submittal", "cycle": "2024", "decided_in_open_cycle": false }, "trophic_status": "Eutrophic", "designated_uses": { "fish_consumption": { "status": null, "ruled_on": null, "threatened": null }, "recreation": { "status": "Not Supporting", "ruled_on": [ "Primary Contact Recreation" ], "threatened": null }, "aquatic_life": { "status": "Not Supporting", "ruled_on": [ "Aquatic Life" ], "threatened": null }, "drinking_water": { "status": "Not Supporting", "ruled_on": [ "Drinking Water" ], "threatened": null } }, "listed_causes": 5, "uses_assessed": 4, "uses_assessed_filed_by_epa": 0, "listed_causes_filed_by_epa": 0, "usgs_gauge_site_no": null, "url": "https://plainlakes.com/lake/freezeout-lake-mt/" }, { "assessment_unit_id": "MT41A005_030", "name": "Upper Red Rock Lake", "water_type": "Lake, Freshwater", "size": { "value": 2947, "units": "Acres" }, "overall_status": "Not Supporting", "epa_ir_category": "5", "cycle_last_assessed": "2000", "integrated_report": { "status": "Organization Final Action - Submittal", "cycle": "2024", "decided_in_open_cycle": false }, "trophic_status": "Unknown", "designated_uses": { "fish_consumption": { "status": null, "ruled_on": null, "threatened": null }, "recreation": { "status": null, "ruled_on": null, "threatened": null }, "aquatic_life": { "status": "Not Supporting", "ruled_on": [ "Aquatic Life" ], "threatened": null }, "drinking_water": { "status": null, "ruled_on": null, "threatened": null } }, "listed_causes": 2, "uses_assessed": 1, "uses_assessed_filed_by_epa": 0, "listed_causes_filed_by_epa": 0, "usgs_gauge_site_no": null, "url": "https://plainlakes.com/lake/upper-red-rock-lake-mt/" }, { "assessment_unit_id": "MT76O004_010", "name": "Ashley Lake", "water_type": "Lake, Freshwater", "size": { "value": 2852.3, "units": "Acres" }, "overall_status": "Not Assessed", "epa_ir_category": "3", "cycle_last_assessed": "2014", "integrated_report": { "status": "Organization Final Action - Submittal", "cycle": "2024", "decided_in_open_cycle": false }, "trophic_status": "Unknown", "designated_uses": { "fish_consumption": { "status": null, "ruled_on": null, "threatened": null }, "recreation": { "status": null, "ruled_on": null, "threatened": null }, "aquatic_life": { "status": null, "ruled_on": null, "threatened": null }, "drinking_water": { "status": null, "ruled_on": null, "threatened": null } }, "listed_causes": 0, "uses_assessed": 0, "uses_assessed_filed_by_epa": 0, "listed_causes_filed_by_epa": 0, "usgs_gauge_site_no": null, "url": "https://plainlakes.com/lake/ashley-lake-mt/" }, { "assessment_unit_id": "MT76E005_010", "name": "Georgetown Lake", "water_type": "Lake, Freshwater", "size": { "value": 2833.5, "units": "Acres" }, "overall_status": "Fully Supporting", "epa_ir_category": "1", "cycle_last_assessed": "2000", "integrated_report": { "status": "Organization Final Action - Submittal", "cycle": "2024", "decided_in_open_cycle": false }, "trophic_status": "Eutrophic", "designated_uses": { "fish_consumption": { "status": null, "ruled_on": null, "threatened": null }, "recreation": { "status": "Fully Supporting", "ruled_on": [ "Primary Contact Recreation" ], "threatened": null }, "aquatic_life": { "status": "Fully Supporting", "ruled_on": [ "Aquatic Life" ], "threatened": null }, "drinking_water": { "status": "Fully Supporting", "ruled_on": [ "Drinking Water" ], "threatened": null } }, "listed_causes": 0, "uses_assessed": 4, "uses_assessed_filed_by_epa": 0, "listed_causes_filed_by_epa": 0, "usgs_gauge_site_no": null, "url": "https://plainlakes.com/lake/georgetown-lake-mt/" }, { "assessment_unit_id": "MT41O003_010", "name": "Bynum Reservoir", "water_type": "Lake, Freshwater", "size": { "value": 2819.2, "units": "Acres" }, "overall_status": "Fully Supporting", "epa_ir_category": "2", "cycle_last_assessed": "2002", "integrated_report": { "status": "Organization Final Action - Submittal", "cycle": "2024", "decided_in_open_cycle": false }, "trophic_status": "Unknown", "designated_uses": { "fish_consumption": { "status": null, "ruled_on": null, "threatened": null }, "recreation": { "status": "Fully Supporting", "ruled_on": [ "Primary Contact Recreation" ], "threatened": null }, "aquatic_life": { "status": "Fully Supporting", "ruled_on": [ "Aquatic Life" ], "threatened": null }, "drinking_water": { "status": null, "ruled_on": null, "threatened": null } }, "listed_causes": 0, "uses_assessed": 3, "uses_assessed_filed_by_epa": 0, "listed_causes_filed_by_epa": 0, "usgs_gauge_site_no": null, "url": "https://plainlakes.com/lake/bynum-reservoir-mt/" }, { "assessment_unit_id": "MT76N002_030", "name": "Cabinet Gorge Reservoir", "water_type": "Lake, Freshwater", "size": { "value": 2756.3, "units": "Acres" }, "overall_status": "Not Assessed", "epa_ir_category": "3", "cycle_last_assessed": "2014", "integrated_report": { "status": "Organization Final Action - Submittal", "cycle": "2024", "decided_in_open_cycle": false }, "trophic_status": "Unknown", "designated_uses": { "fish_consumption": { "status": null, "ruled_on": null, "threatened": null }, "recreation": { "status": null, "ruled_on": null, "threatened": null }, "aquatic_life": { "status": null, "ruled_on": null, "threatened": null }, "drinking_water": { "status": null, "ruled_on": null, "threatened": null } }, "listed_causes": 0, "uses_assessed": 0, "uses_assessed_filed_by_epa": 0, "listed_causes_filed_by_epa": 0, "usgs_gauge_site_no": null, "url": "https://plainlakes.com/lake/cabinet-gorge-reservoir-mt/" }, { "assessment_unit_id": "MT43P001_011", "name": "Bighorn Lake (Yellowtail Reservoir)", "water_type": "Lake, Freshwater", "size": { "value": 2618.8, "units": "Acres" }, "overall_status": "Not Assessed", "epa_ir_category": "3", "cycle_last_assessed": "2014", "integrated_report": { "status": "Organization Final Action - Submittal", "cycle": "2024", "decided_in_open_cycle": false }, "trophic_status": "Eutrophic", "designated_uses": { "fish_consumption": { "status": null, "ruled_on": null, "threatened": null }, "recreation": { "status": null, "ruled_on": null, "threatened": null }, "aquatic_life": { "status": null, "ruled_on": null, "threatened": null }, "drinking_water": { "status": null, "ruled_on": null, "threatened": null } }, "listed_causes": 0, "uses_assessed": 0, "uses_assessed_filed_by_epa": 0, "listed_causes_filed_by_epa": 0, "usgs_gauge_site_no": null, "url": "https://plainlakes.com/lake/bighorn-lake-yellowtail-reservoir-mt/" }, { "assessment_unit_id": "MT43F003_010", "name": "Big Lake", "water_type": "Lake, Freshwater", "size": { "value": 2583, "units": "Acres" }, "overall_status": "Not Supporting", "epa_ir_category": "5", "cycle_last_assessed": "2000", "integrated_report": { "status": "Organization Final Action - Submittal", "cycle": "2024", "decided_in_open_cycle": false }, "trophic_status": "Unknown", "designated_uses": { "fish_consumption": { "status": null, "ruled_on": null, "threatened": null }, "recreation": { "status": null, "ruled_on": null, "threatened": null }, "aquatic_life": { "status": "Not Supporting", "ruled_on": [ "Aquatic Life" ], "threatened": null }, "drinking_water": { "status": "Not Supporting", "ruled_on": [ "Drinking Water" ], "threatened": null } }, "listed_causes": 1, "uses_assessed": 3, "uses_assessed_filed_by_epa": 0, "listed_causes_filed_by_epa": 0, "usgs_gauge_site_no": null, "url": "https://plainlakes.com/lake/big-lake-mt/" }, { "assessment_unit_id": "MT41A005_020", "name": "Lower Red Rock Lake", "water_type": "Lake, Freshwater", "size": { "value": 2217.5, "units": "Acres" }, "overall_status": "Not Supporting", "epa_ir_category": "5", "cycle_last_assessed": "2000", "integrated_report": { "status": "Organization Final Action - Submittal", "cycle": "2024", "decided_in_open_cycle": false }, "trophic_status": "Unknown", "designated_uses": { "fish_consumption": { "status": null, "ruled_on": null, "threatened": null }, "recreation": { "status": null, "ruled_on": null, "threatened": null }, "aquatic_life": { "status": "Not Supporting", "ruled_on": [ "Aquatic Life" ], "threatened": null }, "drinking_water": { "status": null, "ruled_on": null, "threatened": null } }, "listed_causes": 2, "uses_assessed": 1, "uses_assessed_filed_by_epa": 0, "listed_causes_filed_by_epa": 0, "usgs_gauge_site_no": null, "url": "https://plainlakes.com/lake/lower-red-rock-lake-mt/" }, { "assessment_unit_id": "MT42B003_010", "name": "Tongue River Reservoir", "water_type": "Lake, Freshwater", "size": { "value": 2158.5, "units": "Acres" }, "overall_status": "Not Supporting", "epa_ir_category": "5", "cycle_last_assessed": "2024", "integrated_report": { "status": "Organization Final Action - Submittal", "cycle": "2024", "decided_in_open_cycle": false }, "trophic_status": "Eutrophic", "designated_uses": { "fish_consumption": { "status": null, "ruled_on": null, "threatened": null }, "recreation": { "status": null, "ruled_on": null, "threatened": null }, "aquatic_life": { "status": "Not Supporting", "ruled_on": [ "Aquatic Life" ], "threatened": null }, "drinking_water": { "status": null, "ruled_on": null, "threatened": null } }, "listed_causes": 3, "uses_assessed": 1, "uses_assessed_filed_by_epa": 0, "listed_causes_filed_by_epa": 0, "usgs_gauge_site_no": null, "url": "https://plainlakes.com/lake/tongue-river-reservoir-mt/" }, { "assessment_unit_id": "MT41I007_010", "name": "Lake Helena", "water_type": "Lake, Freshwater", "size": { "value": 2078.9, "units": "Acres" }, "overall_status": "Not Supporting", "epa_ir_category": "4A", "cycle_last_assessed": "2000", "integrated_report": { "status": "Organization Final Action - Submittal", "cycle": "2024", "decided_in_open_cycle": false }, "trophic_status": "Unknown", "designated_uses": { "fish_consumption": { "status": null, "ruled_on": null, "threatened": null }, "recreation": { "status": null, "ruled_on": null, "threatened": null }, "aquatic_life": { "status": "Not Supporting", "ruled_on": [ "Aquatic Life" ], "threatened": null }, "drinking_water": { "status": "Not Supporting", "ruled_on": [ "Drinking Water" ], "threatened": null } }, "listed_causes": 4, "uses_assessed": 3, "uses_assessed_filed_by_epa": 0, "listed_causes_filed_by_epa": 0, "usgs_gauge_site_no": null, "url": "https://plainlakes.com/lake/lake-helena-mt/" }, { "assessment_unit_id": "MT40A005_010", "name": "Deadmans Basin Reservoir", "water_type": "Lake, Freshwater", "size": { "value": 1849.1, "units": "Acres" }, "overall_status": "Fully Supporting", "epa_ir_category": "2", "cycle_last_assessed": "2018", "integrated_report": { "status": "Organization Final Action - Submittal", "cycle": "2024", "decided_in_open_cycle": false }, "trophic_status": "Mesotrophic", "designated_uses": { "fish_consumption": { "status": null, "ruled_on": null, "threatened": null }, "recreation": { "status": "Fully Supporting", "ruled_on": [ "Primary Contact Recreation" ], "threatened": null }, "aquatic_life": { "status": null, "ruled_on": null, "threatened": null }, "drinking_water": { "status": "Fully Supporting", "ruled_on": [ "Drinking Water" ], "threatened": null } }, "listed_causes": 0, "uses_assessed": 2, "uses_assessed_filed_by_epa": 0, "listed_causes_filed_by_epa": 0, "usgs_gauge_site_no": null, "url": "https://plainlakes.com/lake/deadmans-basin-reservoir-mt/" }, { "assessment_unit_id": "MT76O004_020", "name": "Lake Mary Ronan", "water_type": "Lake, Freshwater", "size": { "value": 1517.2, "units": "Acres" }, "overall_status": "Not Supporting", "epa_ir_category": "5", "cycle_last_assessed": "2000", "integrated_report": { "status": "Organization Final Action - Submittal", "cycle": "2024", "decided_in_open_cycle": false }, "trophic_status": "Mesotrophic", "designated_uses": { "fish_consumption": { "status": null, "ruled_on": null, "threatened": null }, "recreation": { "status": "Fully Supporting", "ruled_on": [ "Primary Contact Recreation" ], "threatened": null }, "aquatic_life": { "status": "Fully Supporting", "ruled_on": [ "Aquatic Life" ], "threatened": [ "Aquatic Life" ] }, "drinking_water": { "status": null, "ruled_on": null, "threatened": null } }, "listed_causes": 1, "uses_assessed": 3, "uses_assessed_filed_by_epa": 0, "listed_causes_filed_by_epa": 0, "usgs_gauge_site_no": null, "url": "https://plainlakes.com/lake/lake-mary-ronan-mt/" }, { "assessment_unit_id": "MT40B004_020", "name": "Wild Horse Lake", "water_type": "Lake, Freshwater", "size": { "value": 1422.3, "units": "Acres" }, "overall_status": "Fully Supporting", "epa_ir_category": "1", "cycle_last_assessed": "1990", "integrated_report": { "status": "Organization Final Action - Submittal", "cycle": "2024", "decided_in_open_cycle": false }, "trophic_status": "Mesotrophic", "designated_uses": { "fish_consumption": { "status": null, "ruled_on": null, "threatened": null }, "recreation": { "status": "Fully Supporting", "ruled_on": [ "Primary Contact Recreation" ], "threatened": null }, "aquatic_life": { "status": "Fully Supporting", "ruled_on": [ "Aquatic Life" ], "threatened": null }, "drinking_water": { "status": null, "ruled_on": null, "threatened": null } }, "listed_causes": 0, "uses_assessed": 2, "uses_assessed_filed_by_epa": 0, "listed_causes_filed_by_epa": 0, "usgs_gauge_site_no": null, "url": "https://plainlakes.com/lake/wild-horse-lake-mt/" }, { "assessment_unit_id": "MT40B004_010", "name": "War Horse Lake", "water_type": "Lake, Freshwater", "size": { "value": 1337.8, "units": "Acres" }, "overall_status": "Fully Supporting", "epa_ir_category": "2", "cycle_last_assessed": "1990", "integrated_report": { "status": "Organization Final Action - Submittal", "cycle": "2024", "decided_in_open_cycle": false }, "trophic_status": "Mesotrophic", "designated_uses": { "fish_consumption": { "status": null, "ruled_on": null, "threatened": null }, "recreation": { "status": "Fully Supporting", "ruled_on": [ "Primary Contact Recreation" ], "threatened": null }, "aquatic_life": { "status": "Fully Supporting", "ruled_on": [ "Aquatic Life" ], "threatened": null }, "drinking_water": { "status": "Fully Supporting", "ruled_on": [ "Drinking Water" ], "threatened": null } }, "listed_causes": 0, "uses_assessed": 3, "uses_assessed_filed_by_epa": 0, "listed_causes_filed_by_epa": 0, "usgs_gauge_site_no": null, "url": "https://plainlakes.com/lake/war-horse-lake-mt/" }, { "assessment_unit_id": "MT41K004_020", "name": "Willow Creek Reservoir", "water_type": "Lake, Freshwater", "size": { "value": 1323.2, "units": "Acres" }, "overall_status": "Fully Supporting", "epa_ir_category": "2", "cycle_last_assessed": "2006", "integrated_report": { "status": "Organization Final Action - Submittal", "cycle": "2024", "decided_in_open_cycle": false }, "trophic_status": "Mesotrophic", "designated_uses": { "fish_consumption": { "status": null, "ruled_on": null, "threatened": null }, "recreation": { "status": "Fully Supporting", "ruled_on": [ "Primary Contact Recreation" ], "threatened": null }, "aquatic_life": { "status": "Fully Supporting", "ruled_on": [ "Aquatic Life" ], "threatened": null }, "drinking_water": { "status": null, "ruled_on": null, "threatened": null } }, "listed_causes": 0, "uses_assessed": 3, "uses_assessed_filed_by_epa": 0, "listed_causes_filed_by_epa": 0, "usgs_gauge_site_no": null, "url": "https://plainlakes.com/lake/willow-creek-reservoir-mt/" }, { "assessment_unit_id": "MT41K004_010", "name": "Gibson Reservoir", "water_type": "Lake, Freshwater", "size": { "value": 1290.4, "units": "Acres" }, "overall_status": "Fully Supporting", "epa_ir_category": "2", "cycle_last_assessed": "2006", "integrated_report": { "status": "Organization Final Action - Submittal", "cycle": "2024", "decided_in_open_cycle": false }, "trophic_status": "Oligotrophic", "designated_uses": { "fish_consumption": { "status": null, "ruled_on": null, "threatened": null }, "recreation": { "status": "Fully Supporting", "ruled_on": [ "Primary Contact Recreation" ], "threatened": null }, "aquatic_life": { "status": "Fully Supporting", "ruled_on": [ "Aquatic Life" ], "threatened": null }, "drinking_water": { "status": null, "ruled_on": null, "threatened": null } }, "listed_causes": 0, "uses_assessed": 3, "uses_assessed_filed_by_epa": 0, "listed_causes_filed_by_epa": 0, "usgs_gauge_site_no": null, "url": "https://plainlakes.com/lake/gibson-reservoir-mt/" }, { "assessment_unit_id": "MT40R003_020", "name": "Homestead Lake", "water_type": "Lake, Freshwater", "size": { "value": 1183.6, "units": "Acres" }, "overall_status": "Fully Supporting", "epa_ir_category": "1", "cycle_last_assessed": "2006", "integrated_report": { "status": "Organization Final Action - Submittal", "cycle": "2024", "decided_in_open_cycle": false }, "trophic_status": "Eutrophic", "designated_uses": { "fish_consumption": { "status": null, "ruled_on": null, "threatened": null }, "recreation": { "status": "Fully Supporting", "ruled_on": [ "Primary Contact Recreation" ], "threatened": null }, "aquatic_life": { "status": "Fully Supporting", "ruled_on": [ "Aquatic Life" ], "threatened": null }, "drinking_water": { "status": null, "ruled_on": null, "threatened": null } }, "listed_causes": 0, "uses_assessed": 2, "uses_assessed_filed_by_epa": 0, "listed_causes_filed_by_epa": 0, "usgs_gauge_site_no": null, "url": "https://plainlakes.com/lake/homestead-lake-mt/" }, { "assessment_unit_id": "MT76F007_010", "name": "Seeley Lake", "water_type": "Lake, Freshwater", "size": { "value": 1033.4, "units": "Acres" }, "overall_status": "Fully Supporting", "epa_ir_category": "1", "cycle_last_assessed": "2000", "integrated_report": { "status": "Organization Final Action - Submittal", "cycle": "2024", "decided_in_open_cycle": false }, "trophic_status": "Mesotrophic", "designated_uses": { "fish_consumption": { "status": null, "ruled_on": null, "threatened": null }, "recreation": { "status": "Fully Supporting", "ruled_on": [ "Primary Contact Recreation" ], "threatened": null }, "aquatic_life": { "status": "Fully Supporting", "ruled_on": [ "Aquatic Life" ], "threatened": null }, "drinking_water": { "status": "Fully Supporting", "ruled_on": [ "Drinking Water" ], "threatened": null } }, "listed_causes": 0, "uses_assessed": 4, "uses_assessed_filed_by_epa": 0, "listed_causes_filed_by_epa": 0, "usgs_gauge_site_no": null, "url": "https://plainlakes.com/lake/seeley-lake-mt/" }, { "assessment_unit_id": "MT40A005_030", "name": "Martinsdale Reservoir", "water_type": "Lake, Freshwater", "size": { "value": 951.6, "units": "Acres" }, "overall_status": "Fully Supporting", "epa_ir_category": "2", "cycle_last_assessed": "2018", "integrated_report": { "status": "Organization Final Action - Submittal", "cycle": "2024", "decided_in_open_cycle": false }, "trophic_status": "Mesotrophic", "designated_uses": { "fish_consumption": { "status": null, "ruled_on": null, "threatened": null }, "recreation": { "status": "Fully Supporting", "ruled_on": [ "Primary Contact Recreation" ], "threatened": null }, "aquatic_life": { "status": null, "ruled_on": null, "threatened": null }, "drinking_water": { "status": null, "ruled_on": null, "threatened": null } }, "listed_causes": 0, "uses_assessed": 1, "uses_assessed_filed_by_epa": 0, "listed_causes_filed_by_epa": 0, "usgs_gauge_site_no": null, "url": "https://plainlakes.com/lake/martinsdale-reservoir-mt/" }, { "assessment_unit_id": "MT41C004_010", "name": "Ruby River Reservoir", "water_type": "Lake, Freshwater", "size": { "value": 949.1, "units": "Acres" }, "overall_status": "Fully Supporting", "epa_ir_category": "2", "cycle_last_assessed": "2006", "integrated_report": { "status": "Organization Final Action - Submittal", "cycle": "2024", "decided_in_open_cycle": false }, "trophic_status": "Mesotrophic", "designated_uses": { "fish_consumption": { "status": null, "ruled_on": null, "threatened": null }, "recreation": { "status": "Fully Supporting", "ruled_on": [ "Primary Contact Recreation" ], "threatened": null }, "aquatic_life": { "status": "Fully Supporting", "ruled_on": [ "Aquatic Life" ], "threatened": null }, "drinking_water": { "status": null, "ruled_on": null, "threatened": null } }, "listed_causes": 0, "uses_assessed": 3, "uses_assessed_filed_by_epa": 0, "listed_causes_filed_by_epa": 0, "usgs_gauge_site_no": null, "url": "https://plainlakes.com/lake/ruby-river-reservoir-mt/" }, { "assessment_unit_id": "MT41G003_140", "name": "Whitetail Reservoir", "water_type": "Lake, Freshwater", "size": { "value": 834.7, "units": "Acres" }, "overall_status": "Not Assessed", "epa_ir_category": "3", "cycle_last_assessed": "2014", "integrated_report": { "status": "Organization Final Action - Submittal", "cycle": "2024", "decided_in_open_cycle": false }, "trophic_status": "Unknown", "designated_uses": { "fish_consumption": { "status": null, "ruled_on": null, "threatened": null }, "recreation": { "status": null, "ruled_on": null, "threatened": null }, "aquatic_life": { "status": null, "ruled_on": null, "threatened": null }, "drinking_water": { "status": null, "ruled_on": null, "threatened": null } }, "listed_causes": 0, "uses_assessed": 0, "uses_assessed_filed_by_epa": 0, "listed_causes_filed_by_epa": 0, "usgs_gauge_site_no": null, "url": "https://plainlakes.com/lake/whitetail-reservoir-mt/" }, { "assessment_unit_id": "MT76K004_010", "name": "Lindbergh Lake", "water_type": "Lake, Freshwater", "size": { "value": 816.4, "units": "Acres" }, "overall_status": "Not Assessed", "epa_ir_category": "3", "cycle_last_assessed": "2014", "integrated_report": { "status": "Organization Final Action - Submittal", "cycle": "2024", "decided_in_open_cycle": false }, "trophic_status": "Unknown", "designated_uses": { "fish_consumption": { "status": null, "ruled_on": null, "threatened": null }, "recreation": { "status": null, "ruled_on": null, "threatened": null }, "aquatic_life": { "status": null, "ruled_on": null, "threatened": null }, "drinking_water": { "status": null, "ruled_on": null, "threatened": null } }, "listed_causes": 0, "uses_assessed": 0, "uses_assessed_filed_by_epa": 0, "listed_causes_filed_by_epa": 0, "usgs_gauge_site_no": null, "url": "https://plainlakes.com/lake/lindbergh-lake-mt/" }, { "assessment_unit_id": "MT43D003_010", "name": "Cooney Reservoir", "water_type": "Lake, Freshwater", "size": { "value": 768.9, "units": "Acres" }, "overall_status": "Fully Supporting", "epa_ir_category": "1", "cycle_last_assessed": "2006", "integrated_report": { "status": "Organization Final Action - Submittal", "cycle": "2024", "decided_in_open_cycle": false }, "trophic_status": "Unknown", "designated_uses": { "fish_consumption": { "status": null, "ruled_on": null, "threatened": null }, "recreation": { "status": "Fully Supporting", "ruled_on": [ "Primary Contact Recreation" ], "threatened": null }, "aquatic_life": { "status": "Fully Supporting", "ruled_on": [ "Aquatic Life" ], "threatened": null }, "drinking_water": { "status": "Fully Supporting", "ruled_on": [ "Drinking Water" ], "threatened": null } }, "listed_causes": 0, "uses_assessed": 4, "uses_assessed_filed_by_epa": 0, "listed_causes_filed_by_epa": 0, "usgs_gauge_site_no": null, "url": "https://plainlakes.com/lake/cooney-reservoir-mt/" }, { "assessment_unit_id": "MT43Q003_010", "name": "Spidel Waterfowl Production Area", "water_type": "Lake, Freshwater", "size": { "value": 659.8, "units": "Acres" }, "overall_status": "Not Supporting", "epa_ir_category": "5", "cycle_last_assessed": "2000", "integrated_report": { "status": "Organization Final Action - Submittal", "cycle": "2024", "decided_in_open_cycle": false }, "trophic_status": "Unknown", "designated_uses": { "fish_consumption": { "status": null, "ruled_on": null, "threatened": null }, "recreation": { "status": null, "ruled_on": null, "threatened": null }, "aquatic_life": { "status": "Not Supporting", "ruled_on": [ "Aquatic Life" ], "threatened": null }, "drinking_water": { "status": "Not Supporting", "ruled_on": [ "Drinking Water" ], "threatened": null } }, "listed_causes": 3, "uses_assessed": 3, "uses_assessed_filed_by_epa": 0, "listed_causes_filed_by_epa": 0, "usgs_gauge_site_no": null, "url": "https://plainlakes.com/lake/spidel-waterfowl-production-area-mt/" }, { "assessment_unit_id": "MT76F007_030", "name": "Salmon Lake", "water_type": "Lake, Freshwater", "size": { "value": 632.1, "units": "Acres" }, "overall_status": "Fully Supporting", "epa_ir_category": "2", "cycle_last_assessed": "2006", "integrated_report": { "status": "Organization Final Action - Submittal", "cycle": "2024", "decided_in_open_cycle": false }, "trophic_status": "Mesotrophic", "designated_uses": { "fish_consumption": { "status": null, "ruled_on": null, "threatened": null }, "recreation": { "status": "Fully Supporting", "ruled_on": [ "Primary Contact Recreation" ], "threatened": null }, "aquatic_life": { "status": "Fully Supporting", "ruled_on": [ "Aquatic Life" ], "threatened": null }, "drinking_water": { "status": null, "ruled_on": null, "threatened": null } }, "listed_causes": 0, "uses_assessed": 3, "uses_assessed_filed_by_epa": 0, "listed_causes_filed_by_epa": 0, "usgs_gauge_site_no": null, "url": "https://plainlakes.com/lake/salmon-lake-mt/" }, { "assessment_unit_id": "MT41F005_020", "name": "Quake Lake", "water_type": "Lake, Freshwater", "size": { "value": 614.3, "units": "Acres" }, "overall_status": "Not Assessed", "epa_ir_category": "3", "cycle_last_assessed": "2014", "integrated_report": { "status": "Organization Final Action - Submittal", "cycle": "2024", "decided_in_open_cycle": false }, "trophic_status": "Mesotrophic", "designated_uses": { "fish_consumption": { "status": null, "ruled_on": null, "threatened": null }, "recreation": { "status": null, "ruled_on": null, "threatened": null }, "aquatic_life": { "status": null, "ruled_on": null, "threatened": null }, "drinking_water": { "status": null, "ruled_on": null, "threatened": null } }, "listed_causes": 0, "uses_assessed": 0, "uses_assessed_filed_by_epa": 0, "listed_causes_filed_by_epa": 0, "usgs_gauge_site_no": null, "url": "https://plainlakes.com/lake/quake-lake-mt/" }, { "assessment_unit_id": "MT76H003_011", "name": "Painted Rocks Lake", "water_type": "Lake, Freshwater", "size": { "value": 564.9, "units": "Acres" }, "overall_status": "Not Assessed", "epa_ir_category": "3", "cycle_last_assessed": "2014", "integrated_report": { "status": "Organization Final Action - Submittal", "cycle": "2024", "decided_in_open_cycle": false }, "trophic_status": "Unknown", "designated_uses": { "fish_consumption": { "status": null, "ruled_on": null, "threatened": null }, "recreation": { "status": null, "ruled_on": null, "threatened": null }, "aquatic_life": { "status": null, "ruled_on": null, "threatened": null }, "drinking_water": { "status": null, "ruled_on": null, "threatened": null } }, "listed_causes": 0, "uses_assessed": 0, "uses_assessed_filed_by_epa": 0, "listed_causes_filed_by_epa": 0, "usgs_gauge_site_no": null, "url": "https://plainlakes.com/lake/painted-rocks-lake-mt/" }, { "assessment_unit_id": "MT41O004_020", "name": "Priest Butte Lake", "water_type": "Lake, Freshwater", "size": { "value": 446.5, "units": "Acres" }, "overall_status": "Not Supporting", "epa_ir_category": "4A", "cycle_last_assessed": "2004", "integrated_report": { "status": "Organization Final Action - Submittal", "cycle": "2024", "decided_in_open_cycle": false }, "trophic_status": "Unknown", "designated_uses": { "fish_consumption": { "status": null, "ruled_on": null, "threatened": null }, "recreation": { "status": null, "ruled_on": null, "threatened": null }, "aquatic_life": { "status": "Not Supporting", "ruled_on": [ "Aquatic Life" ], "threatened": null }, "drinking_water": { "status": "Not Supporting", "ruled_on": [ "Drinking Water" ], "threatened": null } }, "listed_causes": 4, "uses_assessed": 3, "uses_assessed_filed_by_epa": 0, "listed_causes_filed_by_epa": 0, "usgs_gauge_site_no": null, "url": "https://plainlakes.com/lake/priest-butte-lake-mt/" }, { "assessment_unit_id": "MT41O003_020", "name": "Eureka Reservoir", "water_type": "Lake, Freshwater", "size": { "value": 420.1, "units": "Acres" }, "overall_status": "Fully Supporting", "epa_ir_category": "2", "cycle_last_assessed": "2004", "integrated_report": { "status": "Organization Final Action - Submittal", "cycle": "2024", "decided_in_open_cycle": false }, "trophic_status": "Unknown", "designated_uses": { "fish_consumption": { "status": null, "ruled_on": null, "threatened": null }, "recreation": { "status": "Fully Supporting", "ruled_on": [ "Primary Contact Recreation" ], "threatened": null }, "aquatic_life": { "status": "Fully Supporting", "ruled_on": [ "Aquatic Life" ], "threatened": null }, "drinking_water": { "status": null, "ruled_on": null, "threatened": null } }, "listed_causes": 0, "uses_assessed": 3, "uses_assessed_filed_by_epa": 0, "listed_causes_filed_by_epa": 0, "usgs_gauge_site_no": null, "url": "https://plainlakes.com/lake/eureka-reservoir-mt/" }, { "assessment_unit_id": "MT76K004_020", "name": "Holland Lake", "water_type": "Lake, Freshwater", "size": { "value": 413.9, "units": "Acres" }, "overall_status": "Not Assessed", "epa_ir_category": "3", "cycle_last_assessed": "2014", "integrated_report": { "status": "Organization Final Action - Submittal", "cycle": "2024", "decided_in_open_cycle": false }, "trophic_status": "Unknown", "designated_uses": { "fish_consumption": { "status": null, "ruled_on": null, "threatened": null }, "recreation": { "status": null, "ruled_on": null, "threatened": null }, "aquatic_life": { "status": null, "ruled_on": null, "threatened": null }, "drinking_water": { "status": null, "ruled_on": null, "threatened": null } }, "listed_causes": 0, "uses_assessed": 0, "uses_assessed_filed_by_epa": 0, "listed_causes_filed_by_epa": 0, "usgs_gauge_site_no": null, "url": "https://plainlakes.com/lake/holland-lake-mt/" }, { "assessment_unit_id": "MT41J002_013", "name": "Lake Sutherlin", "water_type": "Lake, Freshwater", "size": { "value": 377.1, "units": "Acres" }, "overall_status": "Not Assessed", "epa_ir_category": "3", "cycle_last_assessed": "2014", "integrated_report": { "status": "Organization Final Action - Submittal", "cycle": "2024", "decided_in_open_cycle": false }, "trophic_status": "Unknown", "designated_uses": { "fish_consumption": { "status": null, "ruled_on": null, "threatened": null }, "recreation": { "status": null, "ruled_on": null, "threatened": null }, "aquatic_life": { "status": null, "ruled_on": null, "threatened": null }, "drinking_water": { "status": null, "ruled_on": null, "threatened": null } }, "listed_causes": 0, "uses_assessed": 0, "uses_assessed_filed_by_epa": 0, "listed_causes_filed_by_epa": 0, "usgs_gauge_site_no": null, "url": "https://plainlakes.com/lake/lake-sutherlin-mt/" }, { "assessment_unit_id": "MT76F007_020", "name": "Nevada Lake", "water_type": "Lake, Freshwater", "size": { "value": 350.9, "units": "Acres" }, "overall_status": "Not Supporting", "epa_ir_category": "4A", "cycle_last_assessed": "2006", "integrated_report": { "status": "Organization Final Action - Submittal", "cycle": "2024", "decided_in_open_cycle": false }, "trophic_status": "Eutrophic", "designated_uses": { "fish_consumption": { "status": null, "ruled_on": null, "threatened": null }, "recreation": { "status": "Not Supporting", "ruled_on": [ "Primary Contact Recreation" ], "threatened": null }, "aquatic_life": { "status": "Not Supporting", "ruled_on": [ "Aquatic Life" ], "threatened": null }, "drinking_water": { "status": "Fully Supporting", "ruled_on": [ "Drinking Water" ], "threatened": null } }, "listed_causes": 5, "uses_assessed": 4, "uses_assessed_filed_by_epa": 0, "listed_causes_filed_by_epa": 0, "usgs_gauge_site_no": null, "url": "https://plainlakes.com/lake/nevada-lake-mt/" }, { "assessment_unit_id": "MT40A005_020", "name": "Lebo Lake", "water_type": "Lake, Freshwater", "size": { "value": 310.9, "units": "Acres" }, "overall_status": "Fully Supporting", "epa_ir_category": "1", "cycle_last_assessed": "2006", "integrated_report": { "status": "Organization Final Action - Submittal", "cycle": "2024", "decided_in_open_cycle": false }, "trophic_status": "Eutrophic", "designated_uses": { "fish_consumption": { "status": null, "ruled_on": null, "threatened": null }, "recreation": { "status": "Fully Supporting", "ruled_on": [ "Primary Contact Recreation" ], "threatened": null }, "aquatic_life": { "status": "Fully Supporting", "ruled_on": [ "Aquatic Life" ], "threatened": null }, "drinking_water": { "status": "Fully Supporting", "ruled_on": [ "Drinking Water" ], "threatened": null } }, "listed_causes": 0, "uses_assessed": 4, "uses_assessed_filed_by_epa": 0, "listed_causes_filed_by_epa": 0, "usgs_gauge_site_no": null, "url": "https://plainlakes.com/lake/lebo-lake-mt/" }, { "assessment_unit_id": "MT76F007_040", "name": "Lake Alva", "water_type": "Lake, Freshwater", "size": { "value": 298, "units": "Acres" }, "overall_status": "Fully Supporting", "epa_ir_category": "2", "cycle_last_assessed": "1990", "integrated_report": { "status": "Organization Final Action - Submittal", "cycle": "2024", "decided_in_open_cycle": false }, "trophic_status": "Unknown", "designated_uses": { "fish_consumption": { "status": null, "ruled_on": null, "threatened": null }, "recreation": { "status": null, "ruled_on": null, "threatened": null }, "aquatic_life": { "status": null, "ruled_on": null, "threatened": null }, "drinking_water": { "status": "Fully Supporting", "ruled_on": [ "Drinking Water" ], "threatened": null } }, "listed_causes": 0, "uses_assessed": 2, "uses_assessed_filed_by_epa": 0, "listed_causes_filed_by_epa": 0, "usgs_gauge_site_no": null, "url": "https://plainlakes.com/lake/lake-alva-mt/" }, { "assessment_unit_id": "MT41S005_020", "name": "Ackley Lake", "water_type": "Lake, Freshwater", "size": { "value": 229.1, "units": "Acres" }, "overall_status": "Not Assessed", "epa_ir_category": "3", "cycle_last_assessed": "2014", "integrated_report": { "status": "Organization Final Action - Submittal", "cycle": "2024", "decided_in_open_cycle": false }, "trophic_status": "Unknown", "designated_uses": { "fish_consumption": { "status": null, "ruled_on": null, "threatened": null }, "recreation": { "status": null, "ruled_on": null, "threatened": null }, "aquatic_life": { "status": null, "ruled_on": null, "threatened": null }, "drinking_water": { "status": null, "ruled_on": null, "threatened": null } }, "listed_causes": 0, "uses_assessed": 0, "uses_assessed_filed_by_epa": 0, "listed_causes_filed_by_epa": 0, "usgs_gauge_site_no": null, "url": "https://plainlakes.com/lake/ackley-lake-mt/" }, { "assessment_unit_id": "MT40A005_040", "name": "Bair Reservoir", "water_type": "Lake, Freshwater", "size": { "value": 221.2, "units": "Acres" }, "overall_status": "Fully Supporting", "epa_ir_category": "2", "cycle_last_assessed": "2018", "integrated_report": { "status": "Organization Final Action - Submittal", "cycle": "2024", "decided_in_open_cycle": false }, "trophic_status": null, "designated_uses": { "fish_consumption": { "status": null, "ruled_on": null, "threatened": null }, "recreation": { "status": "Fully Supporting", "ruled_on": [ "Primary Contact Recreation" ], "threatened": null }, "aquatic_life": { "status": null, "ruled_on": null, "threatened": null }, "drinking_water": { "status": null, "ruled_on": null, "threatened": null } }, "listed_causes": 0, "uses_assessed": 1, "uses_assessed_filed_by_epa": 0, "listed_causes_filed_by_epa": 0, "usgs_gauge_site_no": null, "url": "https://plainlakes.com/lake/bair-reservoir-mt/" }, { "assessment_unit_id": "MT41H006_010", "name": "Hyalite Reservoir", "water_type": "Lake, Freshwater", "size": { "value": 221, "units": "Acres" }, "overall_status": "Fully Supporting", "epa_ir_category": "2", "cycle_last_assessed": "1990", "integrated_report": { "status": "Organization Final Action - Submittal", "cycle": "2024", "decided_in_open_cycle": false }, "trophic_status": "Oligotrophic", "designated_uses": { "fish_consumption": { "status": null, "ruled_on": null, "threatened": null }, "recreation": { "status": "Fully Supporting", "ruled_on": [ "Primary Contact Recreation" ], "threatened": null }, "aquatic_life": { "status": "Fully Supporting", "ruled_on": [ "Aquatic Life" ], "threatened": null }, "drinking_water": { "status": "Fully Supporting", "ruled_on": [ "Drinking Water" ], "threatened": null } }, "listed_causes": 0, "uses_assessed": 3, "uses_assessed_filed_by_epa": 0, "listed_causes_filed_by_epa": 0, "usgs_gauge_site_no": null, "url": "https://plainlakes.com/lake/hyalite-reservoir-mt/" }, { "assessment_unit_id": "MT43F003_030", "name": "Halfbreed Lake", "water_type": "Lake, Freshwater", "size": { "value": 211, "units": "Acres" }, "overall_status": "Not Supporting", "epa_ir_category": "5", "cycle_last_assessed": "2000", "integrated_report": { "status": "Organization Final Action - Submittal", "cycle": "2024", "decided_in_open_cycle": false }, "trophic_status": "Unknown", "designated_uses": { "fish_consumption": { "status": null, "ruled_on": null, "threatened": null }, "recreation": { "status": null, "ruled_on": null, "threatened": null }, "aquatic_life": { "status": "Not Supporting", "ruled_on": [ "Aquatic Life" ], "threatened": null }, "drinking_water": { "status": "Not Supporting", "ruled_on": [ "Drinking Water" ], "threatened": null } }, "listed_causes": 1, "uses_assessed": 3, "uses_assessed_filed_by_epa": 0, "listed_causes_filed_by_epa": 0, "usgs_gauge_site_no": null, "url": "https://plainlakes.com/lake/halfbreed-lake-mt/" }, { "assessment_unit_id": "MT76N002_020", "name": "Thompson Falls Reservoir", "water_type": "Lake, Freshwater", "size": { "value": 203, "units": "Acres" }, "overall_status": "Not Assessed", "epa_ir_category": "3", "cycle_last_assessed": "2014", "integrated_report": { "status": "Organization Final Action - Submittal", "cycle": "2024", "decided_in_open_cycle": false }, "trophic_status": "Unknown", "designated_uses": { "fish_consumption": { "status": null, "ruled_on": null, "threatened": null }, "recreation": { "status": null, "ruled_on": null, "threatened": null }, "aquatic_life": { "status": null, "ruled_on": null, "threatened": null }, "drinking_water": { "status": null, "ruled_on": null, "threatened": null } }, "listed_causes": 0, "uses_assessed": 0, "uses_assessed_filed_by_epa": 0, "listed_causes_filed_by_epa": 0, "usgs_gauge_site_no": null, "url": "https://plainlakes.com/lake/thompson-falls-reservoir-mt/" }, { "assessment_unit_id": "MT41D005_080", "name": "Lake Agnes", "water_type": "Lake, Freshwater", "size": { "value": 108.1, "units": "Acres" }, "overall_status": "Fully Supporting", "epa_ir_category": "2", "cycle_last_assessed": "1990", "integrated_report": { "status": "Organization Final Action - Submittal", "cycle": "2024", "decided_in_open_cycle": false }, "trophic_status": "Unknown", "designated_uses": { "fish_consumption": { "status": null, "ruled_on": null, "threatened": null }, "recreation": { "status": "Fully Supporting", "ruled_on": [ "Primary Contact Recreation" ], "threatened": null }, "aquatic_life": { "status": "Fully Supporting", "ruled_on": [ "Aquatic Life" ], "threatened": null }, "drinking_water": { "status": "Fully Supporting", "ruled_on": [ "Drinking Water" ], "threatened": null } }, "listed_causes": 0, "uses_assessed": 3, "uses_assessed_filed_by_epa": 0, "listed_causes_filed_by_epa": 0, "usgs_gauge_site_no": null, "url": "https://plainlakes.com/lake/lake-agnes-mt/" }, { "assessment_unit_id": "MT43D003_120", "name": "Black Canyon Lake", "water_type": "Lake, Freshwater", "size": { "value": 79.4, "units": "Acres" }, "overall_status": "Fully Supporting", "epa_ir_category": "1", "cycle_last_assessed": "2006", "integrated_report": { "status": "Organization Final Action - Submittal", "cycle": "2024", "decided_in_open_cycle": false }, "trophic_status": "Unknown", "designated_uses": { "fish_consumption": { "status": null, "ruled_on": null, "threatened": null }, "recreation": { "status": "Fully Supporting", "ruled_on": [ "Primary Contact Recreation" ], "threatened": null }, "aquatic_life": { "status": "Fully Supporting", "ruled_on": [ "Aquatic Life" ], "threatened": null }, "drinking_water": { "status": "Fully Supporting", "ruled_on": [ "Drinking Water" ], "threatened": null } }, "listed_causes": 0, "uses_assessed": 4, "uses_assessed_filed_by_epa": 0, "listed_causes_filed_by_epa": 0, "usgs_gauge_site_no": null, "url": "https://plainlakes.com/lake/black-canyon-lake-mt/" }, { "assessment_unit_id": "MT39G002_010", "name": "Lamesteer National Wildlife Refuge", "water_type": "Lake, Freshwater", "size": { "value": 73.6, "units": "Acres" }, "overall_status": "Not Supporting", "epa_ir_category": "4C", "cycle_last_assessed": "2000", "integrated_report": { "status": "Organization Final Action - Submittal", "cycle": "2024", "decided_in_open_cycle": false }, "trophic_status": "Unknown", "designated_uses": { "fish_consumption": { "status": null, "ruled_on": null, "threatened": null }, "recreation": { "status": null, "ruled_on": null, "threatened": null }, "aquatic_life": { "status": "Not Supporting", "ruled_on": [ "Aquatic Life" ], "threatened": null }, "drinking_water": { "status": null, "ruled_on": null, "threatened": null } }, "listed_causes": 1, "uses_assessed": 1, "uses_assessed_filed_by_epa": 0, "listed_causes_filed_by_epa": 0, "usgs_gauge_site_no": null, "url": "https://plainlakes.com/lake/lamesteer-national-wildlife-refuge-mt/" }, { "assessment_unit_id": "MT76O003_030", "name": "Middle Foy Lake", "water_type": "Lake, Freshwater", "size": { "value": 40, "units": "Acres" }, "overall_status": "Not Assessed", "epa_ir_category": "3", "cycle_last_assessed": "2014", "integrated_report": { "status": "Organization Final Action - Submittal", "cycle": "2024", "decided_in_open_cycle": false }, "trophic_status": "Unknown", "designated_uses": { "fish_consumption": { "status": null, "ruled_on": null, "threatened": null }, "recreation": { "status": null, "ruled_on": null, "threatened": null }, "aquatic_life": { "status": null, "ruled_on": null, "threatened": null }, "drinking_water": { "status": null, "ruled_on": null, "threatened": null } }, "listed_causes": 0, "uses_assessed": 0, "uses_assessed_filed_by_epa": 0, "listed_causes_filed_by_epa": 0, "usgs_gauge_site_no": null, "url": "https://plainlakes.com/lake/middle-foy-lake-mt/" }, { "assessment_unit_id": "MT40O002_032", "name": "Halfpint Reservoir", "water_type": "Lake, Freshwater", "size": { "value": 30.4, "units": "Acres" }, "overall_status": "Not Assessed", "epa_ir_category": "3", "cycle_last_assessed": "2014", "integrated_report": { "status": "Organization Final Action - Submittal", "cycle": "2024", "decided_in_open_cycle": false }, "trophic_status": "Unknown", "designated_uses": { "fish_consumption": { "status": null, "ruled_on": null, "threatened": null }, "recreation": { "status": null, "ruled_on": null, "threatened": null }, "aquatic_life": { "status": null, "ruled_on": null, "threatened": null }, "drinking_water": { "status": null, "ruled_on": null, "threatened": null } }, "listed_causes": 0, "uses_assessed": 0, "uses_assessed_filed_by_epa": 0, "listed_causes_filed_by_epa": 0, "usgs_gauge_site_no": null, "url": "https://plainlakes.com/lake/halfpint-reservoir-mt/" }, { "assessment_unit_id": "MT43D003_110", "name": "Big Moose Lake", "water_type": "Lake, Freshwater", "size": { "value": 30, "units": "Acres" }, "overall_status": "Fully Supporting", "epa_ir_category": "1", "cycle_last_assessed": "2006", "integrated_report": { "status": "Organization Final Action - Submittal", "cycle": "2024", "decided_in_open_cycle": false }, "trophic_status": "Unknown", "designated_uses": { "fish_consumption": { "status": null, "ruled_on": null, "threatened": null }, "recreation": { "status": "Fully Supporting", "ruled_on": [ "Primary Contact Recreation" ], "threatened": null }, "aquatic_life": { "status": "Fully Supporting", "ruled_on": [ "Aquatic Life" ], "threatened": null }, "drinking_water": { "status": "Fully Supporting", "ruled_on": [ "Drinking Water" ], "threatened": null } }, "listed_causes": 0, "uses_assessed": 4, "uses_assessed_filed_by_epa": 0, "listed_causes_filed_by_epa": 0, "usgs_gauge_site_no": null, "url": "https://plainlakes.com/lake/big-moose-lake-mt/" }, { "assessment_unit_id": "MT41P005_010", "name": "Oilmont Wetland", "water_type": "Lake, Freshwater", "size": { "value": 21, "units": "Acres" }, "overall_status": "Not Supporting", "epa_ir_category": "5", "cycle_last_assessed": "2000", "integrated_report": { "status": "Organization Final Action - Submittal", "cycle": "2024", "decided_in_open_cycle": false }, "trophic_status": "Unknown", "designated_uses": { "fish_consumption": { "status": null, "ruled_on": null, "threatened": null }, "recreation": { "status": null, "ruled_on": null, "threatened": null }, "aquatic_life": { "status": "Not Supporting", "ruled_on": [ "Aquatic Life" ], "threatened": null }, "drinking_water": { "status": "Not Supporting", "ruled_on": [ "Drinking Water" ], "threatened": null } }, "listed_causes": 3, "uses_assessed": 2, "uses_assessed_filed_by_epa": 0, "listed_causes_filed_by_epa": 0, "usgs_gauge_site_no": null, "url": "https://plainlakes.com/lake/oilmont-wetland-mt/" }, { "assessment_unit_id": "MT43B006_020", "name": "Granite Lake", "water_type": "Lake, Freshwater", "size": { "value": 14.8, "units": "Acres" }, "overall_status": "Not Assessed", "epa_ir_category": "3", "cycle_last_assessed": "2014", "integrated_report": { "status": "Organization Final Action - Submittal", "cycle": "2024", "decided_in_open_cycle": false }, "trophic_status": "Unknown", "designated_uses": { "fish_consumption": { "status": null, "ruled_on": null, "threatened": null }, "recreation": { "status": null, "ruled_on": null, "threatened": null }, "aquatic_life": { "status": null, "ruled_on": null, "threatened": null }, "drinking_water": { "status": null, "ruled_on": null, "threatened": null } }, "listed_causes": 0, "uses_assessed": 0, "uses_assessed_filed_by_epa": 0, "listed_causes_filed_by_epa": 0, "usgs_gauge_site_no": null, "url": "https://plainlakes.com/lake/granite-lake-mt/" }, { "assessment_unit_id": "MT43D003_130", "name": "Elpestrine Lake", "water_type": "Lake, Freshwater", "size": { "value": 8.4, "units": "Acres" }, "overall_status": "Fully Supporting", "epa_ir_category": "2", "cycle_last_assessed": "1990", "integrated_report": { "status": "Organization Final Action - Submittal", "cycle": "2024", "decided_in_open_cycle": false }, "trophic_status": "Oligotrophic", "designated_uses": { "fish_consumption": { "status": null, "ruled_on": null, "threatened": null }, "recreation": { "status": "Fully Supporting", "ruled_on": [ "Primary Contact Recreation" ], "threatened": null }, "aquatic_life": { "status": "Fully Supporting", "ruled_on": [ "Aquatic Life" ], "threatened": null }, "drinking_water": { "status": "Fully Supporting", "ruled_on": [ "Drinking Water" ], "threatened": null } }, "listed_causes": 0, "uses_assessed": 3, "uses_assessed_filed_by_epa": 0, "listed_causes_filed_by_epa": 0, "usgs_gauge_site_no": null, "url": "https://plainlakes.com/lake/elpestrine-lake-mt/" }, { "assessment_unit_id": "MT43D003_100", "name": "Basin Creek Lake", "water_type": "Lake, Freshwater", "size": { "value": 6.2, "units": "Acres" }, "overall_status": "Fully Supporting", "epa_ir_category": "1", "cycle_last_assessed": "2006", "integrated_report": { "status": "Organization Final Action - Submittal", "cycle": "2024", "decided_in_open_cycle": false }, "trophic_status": "Unknown", "designated_uses": { "fish_consumption": { "status": null, "ruled_on": null, "threatened": null }, "recreation": { "status": "Fully Supporting", "ruled_on": [ "Primary Contact Recreation" ], "threatened": null }, "aquatic_life": { "status": "Fully Supporting", "ruled_on": [ "Aquatic Life" ], "threatened": null }, "drinking_water": { "status": "Fully Supporting", "ruled_on": [ "Drinking Water" ], "threatened": null } }, "listed_causes": 0, "uses_assessed": 4, "uses_assessed_filed_by_epa": 0, "listed_causes_filed_by_epa": 0, "usgs_gauge_site_no": null, "url": "https://plainlakes.com/lake/basin-creek-lake-mt/" }, { "assessment_unit_id": "MT43D003_140", "name": "Lower Basin Creek Lake", "water_type": "Lake, Freshwater", "size": { "value": 3.2, "units": "Acres" }, "overall_status": "Fully Supporting", "epa_ir_category": "1", "cycle_last_assessed": "2006", "integrated_report": { "status": "Organization Final Action - Submittal", "cycle": "2024", "decided_in_open_cycle": false }, "trophic_status": null, "designated_uses": { "fish_consumption": { "status": null, "ruled_on": null, "threatened": null }, "recreation": { "status": "Fully Supporting", "ruled_on": [ "Primary Contact Recreation" ], "threatened": null }, "aquatic_life": { "status": "Fully Supporting", "ruled_on": [ "Aquatic Life" ], "threatened": null }, "drinking_water": { "status": "Fully Supporting", "ruled_on": [ "Drinking Water" ], "threatened": null } }, "listed_causes": 0, "uses_assessed": 4, "uses_assessed_filed_by_epa": 0, "listed_causes_filed_by_epa": 0, "usgs_gauge_site_no": null, "url": "https://plainlakes.com/lake/lower-basin-creek-lake-mt/" }, { "assessment_unit_id": "SBR-01", "name": "Snake Butte Reservoir", "water_type": "Reservoir", "size": { "value": 1, "units": "Acres" }, "overall_status": null, "epa_ir_category": null, "cycle_last_assessed": null, "integrated_report": { "status": null, "cycle": null, "decided_in_open_cycle": false }, "trophic_status": null, "designated_uses": { "fish_consumption": { "status": null, "ruled_on": null, "threatened": null }, "recreation": { "status": null, "ruled_on": null, "threatened": null }, "aquatic_life": { "status": null, "ruled_on": null, "threatened": null }, "drinking_water": { "status": null, "ruled_on": null, "threatened": null } }, "listed_causes": 0, "uses_assessed": 0, "uses_assessed_filed_by_epa": 0, "listed_causes_filed_by_epa": 0, "usgs_gauge_site_no": null, "url": "https://plainlakes.com/lake/snake-butte-reservoir-mt/" }, { "assessment_unit_id": "STR-01", "name": "Strike Reservoir", "water_type": "Reservoir", "size": { "value": 1, "units": "Acres" }, "overall_status": null, "epa_ir_category": null, "cycle_last_assessed": null, "integrated_report": { "status": null, "cycle": null, "decided_in_open_cycle": false }, "trophic_status": null, "designated_uses": { "fish_consumption": { "status": null, "ruled_on": null, "threatened": null }, "recreation": { "status": null, "ruled_on": null, "threatened": null }, "aquatic_life": { "status": null, "ruled_on": null, "threatened": null }, "drinking_water": { "status": null, "ruled_on": null, "threatened": null } }, "listed_causes": 0, "uses_assessed": 0, "uses_assessed_filed_by_epa": 0, "listed_causes_filed_by_epa": 0, "usgs_gauge_site_no": null, "url": "https://plainlakes.com/lake/strike-reservoir-mt/" } ] }