{"name": "Angostura Unit. The page heading labels the entry \u201cAngostura Division,\u201d while the narrative identifies the described project as the Angostura Unit.", "slug": "angostura-unit-the-page-heading-labels-the-entry-angostura-division-while-the-narrative-identifies-the-described-project-as-t-377d5ffe62b73e9d", "as_of": "2026-10-03T18:55:14.561214+00:00", "depth": "basic", "facts": {"name": {"value": "Angostura Unit. The page heading labels the entry \u201cAngostura Division,\u201d while the narrative identifies the described project as the Angostura Unit.", "rights": "facts_only", "source": {"url": "https://www.usbr.gov/projects/index.php?id=491", "name": "US Bureau of Reclamation screened government project narrative", "origin": "live", "checksum": "6d06d3c9c73f50f36786424340da9684135a99deb1f70e5cdf866ce3f47920e1", "observed_at": "2026-10-03T18:18:26.365029+00:00", "revision_id": "fe4f097e-a39d-4451-a844-b7fc99a87678", "published_at": null}, "locator": "/html/body/div/div[4]/div/div[2]/div[3]/div[1]/h1", "claim_id": "2130b244-1a63-4a92-a01e-daab6b3fa7f7", "modality": "reported", "confidence": 0.9, "valid_from": null, "attribution": "US Bureau of Reclamation government project account", "evidence_id": "41edfa85-2cd5-4b28-a2d4-1fc4aa76ba69", "valid_until": null, "assertion_id": "9255d063-6a50-4719-97f1-3c6d1db05109", "temporal_expression": "", "extraction_confidence": 0.9}, "scope": {"value": "The described project comprises Angostura Dam and Reservoir and associated irrigation facilities. The dam is a composite concrete-gravity and earth-embankment structure with a 2,030-foot crest (970 feet concrete and 1,060 feet earth), a structural height of 193 feet, and a hydraulic height of 136 feet above the riverbed. Its spillway has five 50-by-30-foot radial gates and a stated discharge capacity of 247,000 cubic feet per second. The river outlet is a 4.5-foot-diameter steel conduit with a 4-foot-square slide gate and stated capacity of 590 cubic feet per second. The irrigation outlet has a 6-foot-diameter steel conduit, valve house, stilling basin and canal headworks; releases to the canal are controlled by two 3.5-foot-square slide gates. The Angostura Canal has a 29.7-mile alignment and 290-cubic-foot-per-second design capacity, and crosses the Cheyenne River through a 9,800-foot inverted siphon. The described unit lands extend about 24 miles downstream from the dam and are served by 39 miles of laterals and 34 miles of open and closed drains. Dam construction began August 23, 1946, and was completed December 7, 1949.", "rights": "facts_only", "source": {"url": "https://www.usbr.gov/projects/index.php?id=491", "name": "US Bureau of Reclamation screened government project narrative", "origin": "live", "checksum": "6d06d3c9c73f50f36786424340da9684135a99deb1f70e5cdf866ce3f47920e1", "observed_at": "2026-10-03T18:18:26.365029+00:00", "revision_id": "fe4f097e-a39d-4451-a844-b7fc99a87678", "published_at": null}, "locator": "/html/body/div/div[4]/div/div[2]/div[3]/div[6]/p[2]", "claim_id": "d7cf2804-dbc4-4ac8-be70-a51ad9507bd5", "modality": "reported", "confidence": 0.9, "valid_from": null, "attribution": "US Bureau of Reclamation government project account", "evidence_id": "348cabb1-1b63-4888-8714-3c3693926003", "valid_until": null, "assertion_id": "7de26742-b052-4b38-889d-9ac724aaf85d", "temporal_expression": "", "extraction_confidence": 0.9}, "delivery": {"value": "The source reports a full irrigation-water supply for 12,218 acres of irrigable land. The first irrigation-water delivery was made in 1953. Listed principal crops are alfalfa and corn, with wheat, barley, oats, pasture and forage also grown.", "rights": "facts_only", "source": {"url": "https://www.usbr.gov/projects/index.php?id=491", "name": "US Bureau of Reclamation screened government project narrative", "origin": "live", "checksum": "6d06d3c9c73f50f36786424340da9684135a99deb1f70e5cdf866ce3f47920e1", "observed_at": "2026-10-03T18:18:26.365029+00:00", "revision_id": "fe4f097e-a39d-4451-a844-b7fc99a87678", "published_at": null}, "locator": "/html/body/div/div[4]/div/div[2]/div[3]/div[6]/p[2]", "claim_id": "c40d874d-fe78-455e-9992-fc063846f141", "modality": "reported", "confidence": 0.9, "valid_from": null, "attribution": "US Bureau of Reclamation government project account", "evidence_id": "348cabb1-1b63-4888-8714-3c3693926003", "valid_until": null, "assertion_id": "91cfef58-eeb3-4de5-bf3e-dc33bed02844", "temporal_expression": "", "extraction_confidence": 0.9}, "location": {"value": "On the Cheyenne River in southwestern South Dakota, at the southeast edge of the Black Hills, about 9 miles southeast of Hot Springs; the unit lies within Custer and Fall River Counties.", "rights": "facts_only", "source": {"url": "https://www.usbr.gov/projects/index.php?id=491", "name": "US Bureau of Reclamation screened government project narrative", "origin": "live", "checksum": "6d06d3c9c73f50f36786424340da9684135a99deb1f70e5cdf866ce3f47920e1", "observed_at": "2026-10-03T18:18:26.365029+00:00", "revision_id": "fe4f097e-a39d-4451-a844-b7fc99a87678", "published_at": null}, "locator": "/html/body/div/div[4]/div/div[2]/div[3]/div[4]/p[2]", "claim_id": "3e63bf1d-6446-4e5b-8654-00d825415cc3", "modality": "reported", "confidence": 0.9, "valid_from": null, "attribution": "US Bureau of Reclamation government project account", "evidence_id": "791f4c6c-2701-4a19-bcc4-cec991182ea3", "valid_until": null, "assertion_id": "2225a25c-dd3d-4218-b371-0d22ca42c46b", "temporal_expression": "", "extraction_confidence": 0.9}}, "origin": "snapshot", "revision": 1, "timeline": [], "is_sample": false, "project_id": "2ab486f0-a895-4a81-b840-b5e3289c2843", "publication": {"local_only": false, "reviewed_at": "2026-10-16T16:26:50.659588+00:00", "indexability": "noindex", "buying_window": "unknown", "policy_version": "accepted-destination-v1", "template_version": "dossier-v1"}, "public_summary": "Angostura Unit, listed under the heading \u201cAngostura Division,\u201d is a Reclamation project on the Cheyenne River in southwestern South Dakota. Its described works include Angostura Dam and Reservoir and associated irrigation facilities. The source reports dam completion on December 7, 1949, first irrigation-water delivery in 1953, and irrigation supply for 12,218 acres.", "schema_version": "1.0", "public_unknowns": ["The supplied project entry gives no publication date and does not establish present physical condition, current operating status, or whether work is underway.", "Procurement, investment, financing stage, construction contractor, planned upgrade, and next milestone are not identified in the supplied project entry."], "evidence_observed_at": "2026-10-03T18:18:26.365029+00:00", "knowledge_reviewed_at": "2026-10-16T16:26:50.659588+00:00", "decisive_evidence_observed_at": "2026-10-03T18:18:26.365029+00:00", "export_metadata": {"publisher": "CapexCue", "project_title": "Angostura Unit", "original_project_title": "Angostura Unit. The page heading labels the entry \u201cAngostura Division,\u201d while the narrative identifies the described project as the Angostura Unit.", "canonical_url": "https://capexcue.com/projects/angostura-unit-the-page-heading-labels-the-entry-angostura-division-while-the-narrative-identifies-the-described-project-as-t-377d5ffe62b73e9d/", "release": {"id": "0cf79009-91c0-4692-94cc-da040d57633a", "number": 1, "published_at": "2026-10-16T16:26:51.001044+00:00"}, "release_reference": "release 1 (0cf79009-91c0-4692-94cc-da040d57633a)", "current_dossier_url": "https://capexcue.com/projects/angostura-unit-the-page-heading-labels-the-entry-angostura-division-while-the-narrative-identifies-the-described-project-as-t-377d5ffe62b73e9d/", "citation": "CapexCue \u2014 Angostura Unit \u2014 dossier released 2026-10-16T16:26:51.001044+00:00, release 1 (0cf79009-91c0-4692-94cc-da040d57633a) \u2014 https://capexcue.com/projects/angostura-unit-the-page-heading-labels-the-entry-angostura-division-while-the-narrative-identifies-the-described-project-as-t-377d5ffe62b73e9d/.", "edition_note": "This file records the release identified above; visit the current dossier for later updates.", "presentation": {"version": "dossier-presentation-v7", "project_milestones": [], "project_category": {"basis": "codex_retained_dossier_curation", "value": "water_environment", "support": {"end": 1142, "start": 0, "sources": [{"url": "https://www.usbr.gov/projects/index.php?id=491", "name": "US Bureau of Reclamation screened government project narrative", "origin": "live", "checksum": "6d06d3c9c73f50f36786424340da9684135a99deb1f70e5cdf866ce3f47920e1", "observed_at": "2026-10-03T18:18:26.365029+00:00", "revision_id": "fe4f097e-a39d-4451-a844-b7fc99a87678", "published_at": null}], "modality": "reported", "predicate": "scope", "raw_value": "The described project comprises Angostura Dam and Reservoir and associated irrigation facilities. The dam is a composite concrete-gravity and earth-embankment structure with a 2,030-foot crest (970 feet concrete and 1,060 feet earth), a structural height of 193 feet, and a hydraulic height of 136 feet above the riverbed. Its spillway has five 50-by-30-foot radial gates and a stated discharge capacity of 247,000 cubic feet per second. The river outlet is a 4.5-foot-diameter steel conduit with a 4-foot-square slide gate and stated capacity of 590 cubic feet per second. The irrigation outlet has a 6-foot-diameter steel conduit, valve house, stilling basin and canal headworks; releases to the canal are controlled by two 3.5-foot-square slide gates. The Angostura Canal has a 29.7-mile alignment and 290-cubic-foot-per-second design capacity, and crosses the Cheyenne River through a 9,800-foot inverted siphon. The described unit lands extend about 24 miles downstream from the dam and are served by 39 miles of laterals and 34 miles of open and closed drains. Dam construction began August 23, 1946, and was completed December 7, 1949.", "statement": "The described project comprises Angostura Dam and Reservoir and associated irrigation facilities. The dam is a composite concrete-gravity and earth-embankment structure with a 2,030-foot crest (970 feet concrete and 1,060 feet earth), a structural height of 193 feet, and a hydraulic height of 136 feet above the riverbed. Its spillway has five 50-by-30-foot radial gates and a stated discharge capacity of 247,000 cubic feet per second. The river outlet is a 4.5-foot-diameter steel conduit with a 4-foot-square slide gate and stated capacity of 590 cubic feet per second. The irrigation outlet has a 6-foot-diameter steel conduit, valve house, stilling basin and canal headworks; releases to the canal are controlled by two 3.5-foot-square slide gates. The Angostura Canal has a 29.7-mile alignment and 290-cubic-foot-per-second design capacity, and crosses the Cheyenne River through a 9,800-foot inverted siphon. The described unit lands extend about 24 miles downstream from the dam and are served by 39 miles of laterals and 34 miles of open and closed drains. Dam construction began August 23, 1946, and was completed December 7, 1949.", "qualifications": {"attribution": "US Bureau of Reclamation government project account"}}, "label": "Water and environment", "icon": "water"}, "project_metadata": {"version": "released-metadata-v7", "category": {"basis": "codex_retained_dossier_curation", "value": "water_environment", "support": {"end": 1142, "start": 0, "sources": [{"url": "https://www.usbr.gov/projects/index.php?id=491", "name": "US Bureau of Reclamation screened government project narrative", "origin": "live", "checksum": "6d06d3c9c73f50f36786424340da9684135a99deb1f70e5cdf866ce3f47920e1", "observed_at": "2026-10-03T18:18:26.365029+00:00", "revision_id": "fe4f097e-a39d-4451-a844-b7fc99a87678", "published_at": null}], "modality": "reported", "predicate": "scope", "raw_value": "The described project comprises Angostura Dam and Reservoir and associated irrigation facilities. The dam is a composite concrete-gravity and earth-embankment structure with a 2,030-foot crest (970 feet concrete and 1,060 feet earth), a structural height of 193 feet, and a hydraulic height of 136 feet above the riverbed. Its spillway has five 50-by-30-foot radial gates and a stated discharge capacity of 247,000 cubic feet per second. The river outlet is a 4.5-foot-diameter steel conduit with a 4-foot-square slide gate and stated capacity of 590 cubic feet per second. The irrigation outlet has a 6-foot-diameter steel conduit, valve house, stilling basin and canal headworks; releases to the canal are controlled by two 3.5-foot-square slide gates. The Angostura Canal has a 29.7-mile alignment and 290-cubic-foot-per-second design capacity, and crosses the Cheyenne River through a 9,800-foot inverted siphon. The described unit lands extend about 24 miles downstream from the dam and are served by 39 miles of laterals and 34 miles of open and closed drains. Dam construction began August 23, 1946, and was completed December 7, 1949.", "statement": "The described project comprises Angostura Dam and Reservoir and associated irrigation facilities. The dam is a composite concrete-gravity and earth-embankment structure with a 2,030-foot crest (970 feet concrete and 1,060 feet earth), a structural height of 193 feet, and a hydraulic height of 136 feet above the riverbed. Its spillway has five 50-by-30-foot radial gates and a stated discharge capacity of 247,000 cubic feet per second. The river outlet is a 4.5-foot-diameter steel conduit with a 4-foot-square slide gate and stated capacity of 590 cubic feet per second. The irrigation outlet has a 6-foot-diameter steel conduit, valve house, stilling basin and canal headworks; releases to the canal are controlled by two 3.5-foot-square slide gates. The Angostura Canal has a 29.7-mile alignment and 290-cubic-foot-per-second design capacity, and crosses the Cheyenne River through a 9,800-foot inverted siphon. The described unit lands extend about 24 miles downstream from the dam and are served by 39 miles of laterals and 34 miles of open and closed drains. Dam construction began August 23, 1946, and was completed December 7, 1949.", "qualifications": {"attribution": "US Bureau of Reclamation government project account"}}}, "input_hash": "5761f4482b6c8f8e7abec2416201dedfa2a0879f8593bc511ea70e3e7b1b96a8", "release_id": "0cf79009-91c0-4692-94cc-da040d57633a", "type_codes": [], "field_states": {"type": {"state": "unknown_after_assessment", "reason": "South Dakota dam, reservoir and irrigation works; no registered dam/irrigation type."}, "region": {"state": "accepted", "reason": "derived_from_accepted_countries"}, "country": {"state": "accepted", "reason": "South Dakota dam, reservoir and irrigation works; no registered dam/irrigation type."}, "category": {"state": "accepted", "reason": "South Dakota dam, reservoir and irrigation works; no registered dam/irrigation type."}}, "region_codes": ["north_america"], "release_hash": "c2979742cef407a74f67fc541602fed0bd4b19403974705087d1d1c2dc450756", "assessment_id": "9eeaaac4-4931-4b44-94e2-c333102c5b71", "country_codes": ["US"], "assessment_hash": "da41438d3e83b1b20437a37762d2fd58ae09ae657f6fb49d3709d65208a6a083", "country_label": "United States", "region_label": "North America", "type_labels": []}, "date_note": "Project event times are distinct from source publication, observation and dossier release dates. An elapsed plan does not establish completion."}}}