{
  "claim_id": "HWF:CONNECTED-WETLANDS-C001",
  "title": "Whole wetland complexes linked to the Homestake mainstem",
  "prepared": "2026-10-06",
  "analysis_crs": "EPSG:32613",
  "acre_m2": 4046.8564224,
  "mainstem_length_m": 13147.17109700913,
  "longitudinal_start": {
    "basis": "Earliest of the four existing modeled dam axes along downstream-oriented Homestake mainstem (alternative B crossing); entire crossing complex is retained and separately accounted.",
    "wgs84": [
      -106.40797779523642,
      39.428131661159036
    ],
    "utm": [
      378816.4960921913,
      4365234.330145651
    ]
  },
  "longitudinal_end": {
    "basis": "USGS Homestake-to-Eagle confluence",
    "wgs84": [
      -106.37869821010314,
      39.50727356250593
    ]
  },
  "lateral_distance_threshold": null,
  "counts": {
    "mapped_mainstem_contact": {
      "complexes": 24,
      "source_features": 121,
      "wetland_fen_source_features": 49
    },
    "terrain_supported_valley_floor": {
      "complexes": 12,
      "source_features": 15,
      "wetland_fen_source_features": 13
    },
    "valley_connection_unresolved": {
      "complexes": 8,
      "source_features": 15,
      "wetland_fen_source_features": 14
    },
    "tributary_slope_context": {
      "complexes": 3,
      "source_features": 16,
      "wetland_fen_source_features": 5
    },
    "upstream_reservoir_context": {
      "complexes": 1,
      "source_features": 2,
      "wetland_fen_source_features": 1
    },
    "unresolved": {
      "complexes": 96,
      "source_features": 229,
      "wetland_fen_source_features": 157
    }
  },
  "acreage": {
    "mapped_mainstem_contact": {
      "wetland_fen_union_acres": 328.13149282611664,
      "separate_pond_acres": 13.26868230901492
    },
    "terrain_supported_valley_floor": {
      "wetland_fen_union_acres": 33.92662615414851,
      "separate_pond_acres": 2.4405834047451833
    },
    "valley_connection_unresolved": {
      "wetland_fen_union_acres": 15.626938859715233,
      "separate_pond_acres": 2.446991552668367
    },
    "tributary_slope_context": {
      "wetland_fen_union_acres": 33.94237913212992,
      "separate_pond_acres": 1.958772238451061
    },
    "upstream_reservoir_context": {
      "wetland_fen_union_acres": 1.2481825801757642,
      "separate_pond_acres": 0.05204068209829785
    },
    "unresolved": {
      "wetland_fen_union_acres": 337.59872267934486,
      "separate_pond_acres": 11.56694904504696
    },
    "all_river_linked_whole_complexes": {
      "wetland_fen_union_acres": 362.0581189802652,
      "separate_pond_acres": 15.7092657137601,
      "complexes": 36
    },
    "crossing_whitney_start_complexes": {
      "wetland_fen_union_acres": 49.22622646225133,
      "complexes": 1,
      "component_ids": [
        "CW-fens-5491"
      ]
    },
    "river_linked_excluding_start_crossing_complexes": {
      "wetland_fen_union_acres": 312.8318925180138,
      "complexes": 35
    }
  },
  "alternative_accounting": {
    "A": {
      "river_linked_whole_complexes_overlap_acres": 65.93655525117364,
      "river_linked_whole_complexes_outside_reservoir_acres": 296.12156372909163,
      "river_linked_excluding_start_crossing_complexes_outside_reservoir_acres": 296.12156372909163
    },
    "B": {
      "river_linked_whole_complexes_overlap_acres": 37.39054097038005,
      "river_linked_whole_complexes_outside_reservoir_acres": 324.667578009884,
      "river_linked_excluding_start_crossing_complexes_outside_reservoir_acres": 312.83189251801394
    },
    "C": {
      "river_linked_whole_complexes_overlap_acres": 46.04962973618638,
      "river_linked_whole_complexes_outside_reservoir_acres": 316.00848924407893,
      "river_linked_excluding_start_crossing_complexes_outside_reservoir_acres": 311.6692590154389
    },
    "D": {
      "river_linked_whole_complexes_overlap_acres": 74.74683212168678,
      "river_linked_whole_complexes_outside_reservoir_acres": 287.3112868585785,
      "river_linked_excluding_start_crossing_complexes_outside_reservoir_acres": 287.3112868585784
    }
  },
  "lower_reach_matched_longitudinal_endpoints": {
    "meaning": "Northing accounting gates through Blodgett Campground and the Eagle River confluence define the lower reach. Whole source geometries remain in the map and GeoJSON.",
    "river_linked_wetland_fen_union_acres": 137.03293033240678,
    "valley_candidates_unresolved_acres": 1.705865730067702
  },
  "provenance": {
    "wetlands": {
      "source_url": "https://cnhp.colostate.edu/arcgis/rest/services/Wetland_Inv/Wetlands/MapServer/0",
      "original_retrieved_utc": "2026-09-18T23:34:09.117816+00:00",
      "extension_retrieved_utc": "2026-10-05T04:53:28.751316+00:00",
      "complete_queries": true,
      "source_sha256": [
        "67159cf5ec9d792b7fabc8ed97fdd7a706aa23d3ceb18c211c7b631deab3fccc",
        "9e2005ab2a007869f5d749a38dc6c8f25a2860a3c51f481e88bc8c5c2cc5bafc"
      ]
    },
    "fens": {
      "source_url": "https://cnhp.colostate.edu/arcgis/rest/services/Wetland_Inv/Fen_Mapping/MapServer/0",
      "original_retrieved_utc": "2026-09-18T23:34:09.099342+00:00",
      "extension_retrieved_utc": "2026-10-05T04:53:21.890703+00:00",
      "complete_queries": true,
      "source_sha256": [
        "9e27e2a5ee3aa163351a38865808faed1bdeed78e1929bc563ead03df70e726c",
        "b16fafc7c6af2b5203e8ecf1f5d1668da796334524dda1f2eb4b7777b5d58ee5"
      ]
    },
    "flowlines": {
      "source_url": "https://3dhp.nationalmap.gov/arcgis/rest/services/usgs_3dhp_all/FeatureServer/50",
      "original_retrieved_utc": "2026-09-18T23:34:13.068147+00:00",
      "extension_retrieved_utc": "2026-10-05T04:53:33.701460+00:00",
      "complete_queries": true,
      "source_sha256": [
        "5fd359eca2af6fe411ed1e6dcdd5ab8043725dfaac6e6b10326329d8b4bc0229",
        "22c56766ae360ec2e6edc83833b87198001cd536a38d0151e87ea15d3a6ba4e9"
      ]
    }
  },
  "merge_checks": {
    "wetlands": {
      "old": 2979,
      "extension": 179,
      "shared_identical": 107,
      "unique": 3051
    },
    "fens": {
      "old": 600,
      "extension": 4,
      "shared_identical": 1,
      "unique": 603
    },
    "flowlines": {
      "old": 1813,
      "extension": 152,
      "shared_identical": 73,
      "unique": 1892
    }
  },
  "source_coverage": {
    "original_utm_envelope": [
      368000,
      4350500,
      384500,
      4371500
    ],
    "lower_extension_wgs84_envelope": [
      -106.41,
      39.465,
      -106.345,
      39.515
    ],
    "inventory_completeness": "Frozen queries matched source IDs/counts. Full returned source polygons preserved. The inventory is a mapped baseline; unrecorded small channels/wetlands are outside its coverage.",
    "terrain": "USGS nominal 10 m terrain reaches northing 4371500; lower portion to the Eagle confluence has archived hillshade but no frozen quantitative DEM.",
    "source_age": "CNHP inventory attributes including source, imagery year and beaver modifier are preserved per feature. A mapped beaver modifier is historical habitat attribution, not a current dam count.",
    "legacy_fens": "Potential Fen is the legacy inventory classification; individual mapped features remain unconfirmed."
  },
  "interpretation": "Areas describe whole mapped wetland habitat complexes with documented mainstem or terrain linkage. Effects follow surface-water, groundwater and ecological connections; these inventory acres do not assign a uniform drying or loss magnitude. Remaining mapped valley and tributary complexes are visible with their connection status.",
  "methods": [
    "Named USGS Homestake flowlines merged and oriented downstream, starting at the earliest existing modeled dam-axis crossing and ending at the documented Eagle River confluence.",
    "Full CNHP wetland, pond and legacy potential-fen features form exact-adjacency components. Full river-network polygons provide context only, preventing one river polygon from carrying an exposure classification into uphill tributaries.",
    "Terrain-reviewed source-feature boundaries stop two uphill propagation routes. Other valley-floor components are included using individual documented terrain/geometry reviews; no distance, elevation or slope threshold acts as an impact boundary.",
    "Wetland/fen polygons are dissolved before area calculation. Pond, river-channel and lake source features are omitted from the wetland/fen input union and retained separately. Overlap between a potential-fen polygon and pond inventory is reconciled explicitly in water_category_accounting.",
    "Whole features crossing the upstream study endpoint are preserved and reported separately. Each reservoir overlap and outside remainder is calculated independently; scenario totals are never summed."
  ],
  "validation": {
    "merged_duplicate_ids_have_identical_geometry": true,
    "unique_exported_inventory_keys": true,
    "all_source_and_export_geometries_valid": true,
    "no_geometry_clipped_to_lateral_buffer": true,
    "reservoir_overlap_plus_remainder_matches": true,
    "separate_water_accounting": true
  },
  "water_category_accounting": {
    "wetland_fen_union_definition": "Union of source wetland and potential-fen classes, matching the existing reservoir-overlap source-class convention. Mapped pond source classes are omitted from that input union, but a potential-fen inventory polygon can overlap a separately mapped pond.",
    "river_linked_wetland_fen_overlap_with_mapped_pond_acres": 0.2570381618599869,
    "river_linked_combined_wetland_fen_pond_union_acres": 377.51034653216516,
    "river_linked_wetland_fen_area_after_removing_mapped_pond_overlap_acres": 361.80108081840444,
    "rule": "Do not add separate pond acres to wetland/fen acres; use the combined geometry union when a combined habitat area is needed.",
    "vegetated_wetland_source_union_acres": 354.0994401202308,
    "potential_fen_source_union_acres": 19.39776367045338,
    "wetland_fen_inventory_overlap_acres": 11.43908481041997,
    "potential_fen_overlap_mapped_pond_acres": 0.2570381618174648,
    "vegetated_wetland_overlap_mapped_pond_acres": 4.5764772668509335e-11,
    "separate_mapped_pond_union_acres": 15.7092657137601
  },
  "display_inventory_counts": {
    "mapped_water": 310,
    "mapped_wetland": 197,
    "potential_fen": 26
  },
  "export_inventory_counts": {
    "mapped_water": 316,
    "mapped_wetland": 210,
    "potential_fen": 29
  }
}