Trinity County, CA
194 public highway bridges
Trinity County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Trinity County, California contains 194 public highway bridges. Roughly 56.2% are rated “Good,” 39.7% “Fair,” and 4.1% “Poor.” Poor means the lowest applicable deck, superstructure, substructure, or culvert rating is 4 or below on the 0–9 NBI scale. It is a condition category, not a live safety or closure decision.
Responsible agencies inspect covered bridges on risk-based intervals under current NBIS rules and submit inventory data to FHWA annually. The list below shows every NBI-tracked bridge in the county. Use the “Sort by” controls to change the ordering, and click any row for its reported inspection date, traffic count, and condition fields.
Source: FHWA National Bridge Inventory. See methodology for full definitions.
Condition Distribution
All Bridges (194)
BEAR WALLOW
FairOver: N.FORK RATTLESNAKE CREEK
NO DATA ENTERED, Trinity, CA
MOORES
FairOver: GLEN CREEK
OLD FOREST GLEN STATION, Trinity, CA
RUSCH CREEK ROAD
FairOver: RUSCH CREEK
NO DATA ENTERED, Trinity, CA
SMITH CREEK
FairOver: BAKER CREEK
NO DATA ENTERED, Trinity, CA
FAWN LODGE ROAD
FairOver: GRASS VALLEY CREEK
0.1 MI NORTH OF SR 299, Trinity, CA
BLANCHARD FLAT RD
FairOver: REDDING CREEK
3.9 MI S/O SR 3, Trinity, CA
BROWNS MOUNTAIN RD
FairOver: LITTLE BROWNS CREEK
0.1 MI E LITLE BRWN CK RD, Trinity, CA
POWERHOUSE ROAD
FairOver: CANYON CREEK
0.7 MI NORTH OF SR 299, Trinity, CA
SOUTH FORK ROAD
FairOver: PELLETREAU CREEK
2.3 MI N HYAMPOM RD, Trinity, CA
PRICE CK CMPBEL RD
FairOver: PRICE CREEK
PATTERSON RANCH ROAD, Trinity, CA
GUY COVINGTON DR
FairOver: E FORK OF STUARTS FORK
0.7 MI SE OF STATE RTE 3, Trinity, CA
COFFEE CREEK ROAD
FairOver: UNION CREEK
12.1 MI W/O S.R. 3, Trinity, CA
EAST FORK ROAD
FairOver: E FK OF N FK TRINITY RIV
4.4 MI NORTH OF SR 299, Trinity, CA
STATE ROUTE 3
FairOver: STUART FORK
02-TRI-003-43.93, Trinity, CA
13 DIPS ROAD
FairOver: SALT CREEK
1.2 MI EAST OF S.R. 3, Trinity, CA
B-BAR-K ROAD
FairOver: BROWNS CREEK
2.9 MI NW OF SR 3, Trinity, CA
BIG CREEK ROAD
FairOver: BIG CREEK
4.5 MI NORTH OF S.R. 3, Trinity, CA
COFFEE CREEK ROAD
FairOver: SOUTH FORK COFFEE CREEK
14.5 MI W OF STATE RTE 3, Trinity, CA
FOREST AVENUE
FairOver: SYDNEY GULCH
0.2 MI SOUTH OF SR 299, Trinity, CA
SOUTH FORK ROAD
FairOver: BIG CREEK
4.8 MI N HYAMPOM RD, Trinity, CA
DENNY ROAD
FairOver: TRINITY RIVER
0.2 MI E JCT SR 299, Trinity, CA
LORENZ STREET
FairOver: MIDDLE WEAVER CREEK
100 FT S OF SR 299, Trinity, CA
RUTH-ZENIA ROAD
FairOver: VAN DUZEN RIVER
HETTENSHAW ROAD, Trinity, CA
STATE ROUTE 3
FairOver: MULE CREEK
02-TRI-003-48.53, Trinity, CA
VAN DUZEN ROAD
FairOver: CEDAR CREEK
12.5 MI SOUTH SR 36, Trinity, CA
WILDWOOD-MAD RIVER
FairOver: E FK SO FK TRINITY RIVER
NO DATA ENTERED, Trinity, CA
STATE ROUTE 299
FairOver: GRAY CREEK
02-TRI-299-6.33, Trinity, CA
STATE ROUTE 3
FairOver: SCORPION CREEK
02-TRI-003-68.95, Trinity, CA
STATE ROUTE 3
FairOver: TRINITY RIVER
02-TRI-003-69.63, Trinity, CA
CANYON CREEK ROAD
FairOver: CLEAR GULCH
1.4 MI NE SR 299 JCT CITY, Trinity, CA
STATE ROUTE 299
FairOver: WEAVER CREEK
02-TRI-299-56.50, Trinity, CA
STATE ROUTE 36
FairOver: RATTLESNAKE CREEK
02-TRI-036-19.06, Trinity, CA
EAST FK HAYFORK RD
FairOver: EAST FORK HAYFORK CREEK
1.8 MI E WILDWOOD ROAD, Trinity, CA
STATE ROUTE 3
FairOver: SALT CREEK
02-TRI-003-L3.84, Trinity, CA
SOUTH FORK ROAD
FairOver: SOUTH FORK TRINITY RIVER
0.5 MI W HYAMPOM RD, Trinity, CA
EAGLE CRK LOOP RD
FairOver: MINNEHAHA CREEK
3 MI N OF COFFEE CRK RD, Trinity, CA
SWIFT CREEK ROAD
FairOver: NORTH FORK SWIFT CREEK
1.0 MI W OF STATE RTE 3, Trinity, CA
STATE ROUTE 299
FairOver: CANYON CREEK
02-TRI-299-43.36, Trinity, CA
LEWISTON ROAD
FairOver: GRASS VALLEY CREEK
1.4 MI NORTH OF SR 299, Trinity, CA
EAST SIDE ROAD
FairOver: EAST FORK TRINITY RIVER
7.8 MI SOUTHEAST OF SR 3, Trinity, CA
STATE ROUTE 299
FairOver: GRASS VALLEY CREEK
02-TRI-299-65.80, Trinity, CA
STATE ROUTE 3
FairOver: BIG CREEK
02-TRI-003-9.24, Trinity, CA
STATE ROUTE 3
FairOver: TRINITY RIVER
02-TRI-003-70.92, Trinity, CA
STATE ROUTE 3
FairOver: TRINITY RIVER
02-TRI-003-75.82, Trinity, CA
STATE ROUTE 3
FairOver: SCOTT MOUNTAIN CREEK
02-TRI-003-T80.67, Trinity, CA
STATE ROUTE 299
FairOver: TRINITY RIVER
02-TRI-299-R3.16, Trinity, CA
SALYER LOOP ROAD
FairOver: TRINITY RIVER
0.1 MI N OF SR 299, Trinity, CA
OAK AVE
FairOver: HAYFORK CREEK
0.39 MI S SR3, Trinity, CA
WILDWOOD ROAD
FairOver: HAYFORK CREEK
2.7 MI N OF SR 36, Trinity, CA
EAGLE CRK LOOP RD
FairOver: EAGLE CREEK
NEAR RAMSHORN ROAD, Trinity, CA
Read our methodology - how this data is sourced, computed, and verified.
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Every figure on PlainBridge is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.