{"schema_version":"1.0","record_id":"co-dwr-wdid:4003449","record_type":"colorado_dwr_structure","wdid":"4003449","canonical_url":"https://getditchbook.com/wdid/4003449/","identity":{"official_name":"WILLOW RESERVOIR","display_name":"Willow Reservoir","aliases":[],"structure_type":"RESERVOIR"},"administration":{"division":4,"water_district":40,"current_in_use_code":"A","current_in_use_label":"Active structure with contemporary diversion records"},"location":{"county":"Delta","water_source":"East Leroux Creek","stream_mile":null,"legal_location":"Q10 NE · Q40 NE · Q160 SW · Section 9 · Township 12.0 S · Range 92.0 W · Sixth Principal Meridian","point":{"type":"Point","coordinates":[-107.674106,39.021847]},"point_accuracy":"GPS"},"state_record":{"modified_at":"2023-11-13","associated_case_references":["CA3503","CA5091"],"dwr_associated_contacts":["LEROUX CREEK WATER USERS (ALVEY, TOM)"],"period_of_record_start":"1975-09-01","period_of_record_end":"2024-10-31","source_url":"https://dwr.state.co.us/Tools/Structures/4003449"},"water_rights":{"row_count":28,"rows":[{"record_number":1589967,"appropriation_date":"1883-08-11","adjudication_date":"1889-06-17","prior_adjudication_date":"0001-01-01","amounts":{"absolute":0,"conditional":0,"apex_absolute":0.64,"apex_conditional":0,"unit_code":"C"},"priority_number":"3","administration_number":12276,"order_number":0,"decreed_use_code":"1","associated_case_references":["CA5091"],"source_modified_at":"2019-02-22","source_url":"https://dwr.state.co.us/Tools/WaterRights/NetAmounts/1589967"},{"record_number":1589968,"appropriation_date":"1883-08-20","adjudication_date":"1889-06-17","prior_adjudication_date":"0001-01-01","amounts":{"absolute":0,"conditional":0,"apex_absolute":17.7,"apex_conditional":0,"unit_code":"C"},"priority_number":"4","administration_number":12285,"order_number":0,"decreed_use_code":"1","associated_case_references":["CA5091"],"source_modified_at":"2019-02-22","source_url":"https://dwr.state.co.us/Tools/WaterRights/NetAmounts/1589968"},{"record_number":1589969,"appropriation_date":"1884-02-18","adjudication_date":"1889-06-17","prior_adjudication_date":"0001-01-01","amounts":{"absolute":0,"conditional":0,"apex_absolute":8,"apex_conditional":0,"unit_code":"C"},"priority_number":"6","administration_number":12467,"order_number":0,"decreed_use_code":"1","associated_case_references":["CA5091"],"source_modified_at":"2019-02-22","source_url":"https://dwr.state.co.us/Tools/WaterRights/NetAmounts/1589969"},{"record_number":1589970,"appropriation_date":"1885-12-01","adjudication_date":"1889-06-17","prior_adjudication_date":"0001-01-01","amounts":{"absolute":0,"conditional":0,"apex_absolute":1.31,"apex_conditional":0,"unit_code":"C"},"priority_number":"7","administration_number":13119,"order_number":0,"decreed_use_code":"1","associated_case_references":["CA5091"],"source_modified_at":"2019-02-22","source_url":"https://dwr.state.co.us/Tools/WaterRights/NetAmounts/1589970"},{"record_number":1589971,"appropriation_date":"1887-03-29","adjudication_date":"1889-06-17","prior_adjudication_date":"0001-01-01","amounts":{"absolute":0,"conditional":0,"apex_absolute":1.44,"apex_conditional":0,"unit_code":"C"},"priority_number":"8","administration_number":13602,"order_number":0,"decreed_use_code":"1","associated_case_references":["CA5091"],"source_modified_at":"2019-02-22","source_url":"https://dwr.state.co.us/Tools/WaterRights/NetAmounts/1589971"},{"record_number":1589972,"appropriation_date":"1887-04-02","adjudication_date":"1889-06-17","prior_adjudication_date":"0001-01-01","amounts":{"absolute":0,"conditional":0,"apex_absolute":0.3,"apex_conditional":0,"unit_code":"C"},"priority_number":"9","administration_number":13606,"order_number":0,"decreed_use_code":"1","associated_case_references":["CA5091"],"source_modified_at":"2019-02-22","source_url":"https://dwr.state.co.us/Tools/WaterRights/NetAmounts/1589972"},{"record_number":1589973,"appropriation_date":"1887-04-29","adjudication_date":"1889-06-17","prior_adjudication_date":"0001-01-01","amounts":{"absolute":0,"conditional":0,"apex_absolute":0.54,"apex_conditional":0,"unit_code":"C"},"priority_number":"10","administration_number":13633,"order_number":0,"decreed_use_code":"1","associated_case_references":["CA5091"],"source_modified_at":"2019-02-22","source_url":"https://dwr.state.co.us/Tools/WaterRights/NetAmounts/1589973"},{"record_number":1589974,"appropriation_date":"1887-06-21","adjudication_date":"1889-06-17","prior_adjudication_date":"0001-01-01","amounts":{"absolute":0,"conditional":0,"apex_absolute":2.388,"apex_conditional":0,"unit_code":"C"},"priority_number":"11","administration_number":13686,"order_number":0,"decreed_use_code":"1","associated_case_references":["CA5091"],"source_modified_at":"2019-02-22","source_url":"https://dwr.state.co.us/Tools/WaterRights/NetAmounts/1589974"},{"record_number":1589975,"appropriation_date":"1887-04-02","adjudication_date":"1901-04-12","prior_adjudication_date":"1889-06-17","amounts":{"absolute":0,"conditional":0,"apex_absolute":0.53,"apex_conditional":0,"unit_code":"C"},"priority_number":"19","administration_number":14413.13606,"order_number":0,"decreed_use_code":"1","associated_case_references":["CA5091"],"source_modified_at":"2019-02-22","source_url":"https://dwr.state.co.us/Tools/WaterRights/NetAmounts/1589975"},{"record_number":1589976,"appropriation_date":"1901-05-31","adjudication_date":"1904-02-20","prior_adjudication_date":"1903-02-27","amounts":{"absolute":0,"conditional":0,"apex_absolute":6.375,"apex_conditional":0,"unit_code":"C"},"priority_number":"41","administration_number":19415.18778,"order_number":0,"decreed_use_code":"1","associated_case_references":["CA5091"],"source_modified_at":"2019-02-22","source_url":"https://dwr.state.co.us/Tools/WaterRights/NetAmounts/1589976"},{"record_number":1589977,"appropriation_date":"1889-06-17","adjudication_date":"1908-03-20","prior_adjudication_date":"1907-09-28","amounts":{"absolute":0,"conditional":0,"apex_absolute":48.79,"apex_conditional":0,"unit_code":"C"},"priority_number":"13","administration_number":21089.14413,"order_number":0,"decreed_use_code":"1","associated_case_references":["CA5091"],"source_modified_at":"2019-02-22","source_url":"https://dwr.state.co.us/Tools/WaterRights/NetAmounts/1589977"},{"record_number":1589978,"appropriation_date":"1893-04-01","adjudication_date":"1908-03-20","prior_adjudication_date":"1907-09-28","amounts":{"absolute":0,"conditional":0,"apex_absolute":0.71,"apex_conditional":0,"unit_code":"C"},"priority_number":"15","administration_number":21089.15797,"order_number":0,"decreed_use_code":"1","associated_case_references":["CA5091"],"source_modified_at":"2019-02-22","source_url":"https://dwr.state.co.us/Tools/WaterRights/NetAmounts/1589978"},{"record_number":1589979,"appropriation_date":"1895-04-01","adjudication_date":"1908-03-20","prior_adjudication_date":"1907-09-28","amounts":{"absolute":0,"conditional":0,"apex_absolute":0.79,"apex_conditional":0,"unit_code":"C"},"priority_number":"17","administration_number":21089.16527,"order_number":0,"decreed_use_code":"1","associated_case_references":["CA5091"],"source_modified_at":"2019-02-22","source_url":"https://dwr.state.co.us/Tools/WaterRights/NetAmounts/1589979"},{"record_number":1589980,"appropriation_date":"1896-04-01","adjudication_date":"1908-03-20","prior_adjudication_date":"1907-09-28","amounts":{"absolute":0,"conditional":0,"apex_absolute":1.04,"apex_conditional":0,"unit_code":"C"},"priority_number":"18","administration_number":21089.16893,"order_number":0,"decreed_use_code":"1","associated_case_references":["CA5091"],"source_modified_at":"2019-02-22","source_url":"https://dwr.state.co.us/Tools/WaterRights/NetAmounts/1589980"},{"record_number":1589981,"appropriation_date":"1897-04-01","adjudication_date":"1908-03-20","prior_adjudication_date":"1907-09-28","amounts":{"absolute":0,"conditional":0,"apex_absolute":0.48,"apex_conditional":0,"unit_code":"C"},"priority_number":"20","administration_number":21089.17258,"order_number":0,"decreed_use_code":"1","associated_case_references":["CA5091"],"source_modified_at":"2019-02-22","source_url":"https://dwr.state.co.us/Tools/WaterRights/NetAmounts/1589981"},{"record_number":1589982,"appropriation_date":"1898-04-01","adjudication_date":"1908-03-20","prior_adjudication_date":"1907-09-28","amounts":{"absolute":0,"conditional":0,"apex_absolute":1.92,"apex_conditional":0,"unit_code":"C"},"priority_number":"21","administration_number":21089.17623,"order_number":0,"decreed_use_code":"1","associated_case_references":["CA5091"],"source_modified_at":"2019-02-22","source_url":"https://dwr.state.co.us/Tools/WaterRights/NetAmounts/1589982"},{"record_number":1589983,"appropriation_date":"1900-04-01","adjudication_date":"1908-03-20","prior_adjudication_date":"1907-09-28","amounts":{"absolute":0,"conditional":0,"apex_absolute":9.8,"apex_conditional":0,"unit_code":"C"},"priority_number":"22","administration_number":21089.18353,"order_number":0,"decreed_use_code":"1","associated_case_references":["CA5091"],"source_modified_at":"2019-02-22","source_url":"https://dwr.state.co.us/Tools/WaterRights/NetAmounts/1589983"},{"record_number":1589984,"appropriation_date":"1901-04-01","adjudication_date":"1908-03-20","prior_adjudication_date":"1907-09-28","amounts":{"absolute":0,"conditional":0,"apex_absolute":0.54,"apex_conditional":0,"unit_code":"C"},"priority_number":"23","administration_number":21089.18718,"order_number":0,"decreed_use_code":"1","associated_case_references":["CA5091"],"source_modified_at":"2019-02-22","source_url":"https://dwr.state.co.us/Tools/WaterRights/NetAmounts/1589984"},{"record_number":1589985,"appropriation_date":"1901-12-14","adjudication_date":"1908-03-20","prior_adjudication_date":"1907-09-28","amounts":{"absolute":0,"conditional":0,"apex_absolute":19.72,"apex_conditional":0,"unit_code":"C"},"priority_number":"25","administration_number":21089.18975,"order_number":0,"decreed_use_code":"1","associated_case_references":["CA5091"],"source_modified_at":"2019-02-22","source_url":"https://dwr.state.co.us/Tools/WaterRights/NetAmounts/1589985"},{"record_number":1589986,"appropriation_date":"1902-01-14","adjudication_date":"1908-03-20","prior_adjudication_date":"1907-09-28","amounts":{"absolute":0,"conditional":0,"apex_absolute":2.72,"apex_conditional":0,"unit_code":"C"},"priority_number":"24","administration_number":21089.19006,"order_number":0,"decreed_use_code":"1","associated_case_references":["CA5091"],"source_modified_at":"2019-02-22","source_url":"https://dwr.state.co.us/Tools/WaterRights/NetAmounts/1589986"},{"record_number":1589987,"appropriation_date":"1902-04-01","adjudication_date":"1908-03-20","prior_adjudication_date":"1907-09-28","amounts":{"absolute":0,"conditional":0,"apex_absolute":0.37,"apex_conditional":0,"unit_code":"C"},"priority_number":"25","administration_number":21089.19083,"order_number":0,"decreed_use_code":"1","associated_case_references":["CA5091"],"source_modified_at":"2019-02-22","source_url":"https://dwr.state.co.us/Tools/WaterRights/NetAmounts/1589987"},{"record_number":1589988,"appropriation_date":"1904-04-01","adjudication_date":"1908-03-20","prior_adjudication_date":"1907-09-28","amounts":{"absolute":0,"conditional":0,"apex_absolute":0.48,"apex_conditional":0,"unit_code":"C"},"priority_number":"27","administration_number":21089.19814,"order_number":0,"decreed_use_code":"1","associated_case_references":["CA5091"],"source_modified_at":"2019-02-22","source_url":"https://dwr.state.co.us/Tools/WaterRights/NetAmounts/1589988"},{"record_number":1589989,"appropriation_date":"1908-03-21","adjudication_date":"1930-02-10","prior_adjudication_date":"1920-08-28","amounts":{"absolute":0,"conditional":0,"apex_absolute":54.77,"apex_conditional":0,"unit_code":"C"},"priority_number":"53, G53","administration_number":25807.21264,"order_number":0,"decreed_use_code":"1","associated_case_references":["CA5091"],"source_modified_at":"2019-02-22","source_url":"https://dwr.state.co.us/Tools/WaterRights/NetAmounts/1589989"},{"record_number":1589990,"appropriation_date":"1882-07-22","adjudication_date":"1954-03-20","prior_adjudication_date":"1937-05-28","amounts":{"absolute":0,"conditional":0,"apex_absolute":1.5,"apex_conditional":0,"unit_code":"C"},"priority_number":"J6","administration_number":31924.11891,"order_number":0,"decreed_use_code":"89","associated_case_references":["CA5091"],"source_modified_at":"2019-02-22","source_url":"https://dwr.state.co.us/Tools/WaterRights/NetAmounts/1589990"},{"record_number":1589991,"appropriation_date":"1883-03-01","adjudication_date":"1954-03-20","prior_adjudication_date":"1937-05-28","amounts":{"absolute":0,"conditional":0,"apex_absolute":1.5,"apex_conditional":0,"unit_code":"C"},"priority_number":"J8","administration_number":31924.12113,"order_number":0,"decreed_use_code":"89","associated_case_references":["CA5091"],"source_modified_at":"2019-02-22","source_url":"https://dwr.state.co.us/Tools/WaterRights/NetAmounts/1589991"},{"record_number":1589992,"appropriation_date":"1884-12-03","adjudication_date":"1954-03-20","prior_adjudication_date":"1937-05-28","amounts":{"absolute":0,"conditional":0,"apex_absolute":0.88,"apex_conditional":0,"unit_code":"C"},"priority_number":"J19","administration_number":31924.12756,"order_number":0,"decreed_use_code":"89","associated_case_references":["CA5091"],"source_modified_at":"2019-02-22","source_url":"https://dwr.state.co.us/Tools/WaterRights/NetAmounts/1589992"},{"record_number":1589993,"appropriation_date":"1939-08-17","adjudication_date":"1954-03-20","prior_adjudication_date":"1937-05-28","amounts":{"absolute":69,"conditional":0,"apex_absolute":0,"apex_conditional":0,"unit_code":"A"},"priority_number":"J243","administration_number":32735,"order_number":0,"decreed_use_code":"1","associated_case_references":["CA3503"],"source_modified_at":"2019-02-22","source_url":"https://dwr.state.co.us/Tools/WaterRights/NetAmounts/1589993"},{"record_number":1589994,"appropriation_date":"1948-07-12","adjudication_date":"1954-03-20","prior_adjudication_date":"1937-05-28","amounts":{"absolute":51,"conditional":0,"apex_absolute":0,"apex_conditional":0,"unit_code":"A"},"priority_number":"J318","administration_number":35987,"order_number":0,"decreed_use_code":"1","associated_case_references":["CA3503"],"source_modified_at":"2019-02-22","source_url":"https://dwr.state.co.us/Tools/WaterRights/NetAmounts/1589994"}],"live_search_url":"https://dwr.state.co.us/Tools/WaterRights/NetAmounts"},"company_association":{"status":"verified","verified_companies":[{"entity_id":"19871114137","name":"Leroux Creek Water Users' Association","canonical_url":"https://getditchbook.com/companies/leroux-creek-water-users-association/","verified_at":"2026-08-17","source_refs":["ditchbook-match:4003449"]}],"dwr_associated_contacts":["LEROUX CREEK WATER USERS (ALVEY, TOM)"],"dwr_contacts_are_verified_owners":false,"last_verified_at":"2026-08-17","next_check":"Confirm the current operator or secretary from company, court, and county records."},"geometry":{"status":"reviewed_reservoir_outline","point_source":"colorado_dwr_structure","point_accuracy":"GPS","reviewed_geometry_url":"https://getditchbook.com/wdid/geometry/4003449.json","last_reviewed_at":"2026-08-07","proves_parcel_crossing":false},"related_records":[{"wdid":"4003430","name":"Fairmount Reservoir","canonical_url":"https://getditchbook.com/wdid/4003430/","relation":"same_named_water_source","distance_km":0.9},{"wdid":"4003424","name":"Dog Fish Lake Res","canonical_url":"https://getditchbook.com/wdid/4003424/","relation":"same_named_water_source","distance_km":1.6},{"wdid":"4003432","name":"Goodenough Res No 2","canonical_url":"https://getditchbook.com/wdid/4003432/","relation":"same_named_water_source","distance_km":1.8},{"wdid":"4003438","name":"Lucky Find Reservoir","canonical_url":"https://getditchbook.com/wdid/4003438/","relation":"same_named_water_source","distance_km":3.5},{"wdid":"4003436","name":"Holy Terror Res","canonical_url":"https://getditchbook.com/wdid/4003436/","relation":"nearby","distance_km":1.7},{"wdid":"4003443","name":"Pine Cone Reservoir","canonical_url":"https://getditchbook.com/wdid/4003443/","relation":"nearby","distance_km":2.4}],"freshness":{"policy_version":"source-capture-v1","evaluated_at":"2026-08-13","state_at_evaluation":"recent","age_days_at_evaluation":2,"dwr":{"retrieved_at":"2026-08-11","structure_modified_at":"2023-11-13","next_refresh_due_at":"2026-09-25"},"company_association":{"status":"verified","last_verified_at":"2026-08-17"},"geometry":{"status":"reviewed_reservoir_outline","last_reviewed_at":"2026-08-07"},"notice":"Freshness describes source capture and review dates, not legal conclusiveness."},"sources":[{"source_id":"co-dwr-structure:4003449","evidence_lane":"dwr_state_record","publisher":"Colorado Division of Water Resources","dataset":"Structures","url":"https://dwr.state.co.us/Tools/Structures/4003449","retrieved_at":"2026-08-11","source_modified_at":"2023-11-13"},{"source_id":"co-dwr-net-amounts","evidence_lane":"dwr_state_record","publisher":"Colorado Division of Water Resources","dataset":"Water Rights Net Amounts","url":"https://dwr.state.co.us/Tools/WaterRights/NetAmounts","retrieved_at":"2026-08-11","source_modified_at":null},{"source_id":"ditchbook-match:4003449","evidence_lane":"ditchbook_verified","publisher":"DitchBook","dataset":"Published company-to-WDID crosswalk","url":"https://getditchbook.com/methods/matching/","retrieved_at":"2026-08-17","source_modified_at":"2026-08-17"},{"source_id":"ditchbook-geometry:4003449","evidence_lane":"reviewed_geometry","publisher":"DitchBook","dataset":"Reviewed water-structure geometry","url":"https://getditchbook.com/wdid/geometry/4003449.json","retrieved_at":"2026-08-07","source_modified_at":"2026-08-07"}],"provenance":[{"path":"/identity","evidence_lane":"dwr_state_record","source_refs":["co-dwr-structure:4003449"],"assertion":"published_by_source"},{"path":"/location","evidence_lane":"dwr_state_record","source_refs":["co-dwr-structure:4003449"],"assertion":"published_by_source"},{"path":"/company_association/status","evidence_lane":"ditchbook_verified","source_refs":["ditchbook-match:4003449"],"assertion":"verified"},{"path":"/geometry/status","evidence_lane":"reviewed_geometry","source_refs":["ditchbook-geometry:4003449"],"assertion":"reviewed_reservoir_outline"}]}