Trinity River HU, Middle HA

Waterbody ID (WBID): CAR1063102119990604163706
County / counties: Trinity
Regional Water Board: Regional Board 1 - North Coast Region
Waterbody type: River & Stream
Condition category: Category 4a — TMDL completed
Integrated Report cycle: 2026

303(d) listings (2)

Each row is one official listing decision from Appendix A of the Final 2026 California Integrated Report. Source terminology is preserved as published.

Pollutant / stressor	Decision ID	Final listing decision	Decision status	TMDL requirement status	TMDL project	TMDL priority
SedimentSediment	169528	List on 303(d) list (being addressed by USEPA approved TMDL)	Original	5B — Addressed by USEPA-approved TMDL	Trinity River Sediment	—
Sedimentation/SiltationSediment	68802	List on 303(d) list (being addressed by USEPA approved TMDL)	Original	5B — Addressed by USEPA-approved TMDL	Trinity River Sediment	—

Source & provenance

Agency: California State Water Resources Control Board
Report: Final 2026 California Integrated Report
Dataset: Appendix A — 2026 303(d) List of Impaired Waters
Imported: Sep 16, 2026, 10:56 PM UTC
Waterbody ID: CAR1063102119990604163706
CALWNUM: 1106.150702, 1106.310101, 1106.310103, 1106.310105, 1106.310302, 1106.310502, 1106.310604, 1106.320002, 1106.320004, 1106.401003
WBD code: 180102110505, 180102110601, 180102110602, 180102110701, 180102110702, 180102110703, 180102110704, 180102110705, 180102110706, 180102110707, (Total Count: 11)
Geometry: Official Water Board GIS (CA_WATERBOARDS_GIS_FINAL_2026)

View official Water Board fact sheet ↗Download Appendix A source file ↗

Location

Official 2026 Water Board geometry. Demonstration facility markers are shown for context only.

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Watershed: —
Assessed size: 1222.06 Miles

Derived facility associations

Industrial stormwater facilities geographically associated with this waterbody. These are derived spatial associations, not Water Board findings.

Derived

Trinity River Lumber Co

Weaverville · Notice of Intent · 0.16 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

United Parcel Service Oakland Hub

Weaverville · No Exposure Certification · 0.12 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Weaverville Landfill

Weaverville · Notice of Intent · 0.21 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Facility records are official Industrial General Permit registrations, but the association between a facility and this waterbody is derived geographically (proximity or shared HUC12 subwatershed) and is not a Water Board receiving-water determination. Where a permit carries a Water Board-stated TMDL requirement naming this water, it is listed separately above.