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)
LONG RIDGE ROAD
FairOver: SALT CREEK
2 MI E JCT HOAGLIN RD, Trinity, CA
WILDWOOD ROAD
FairOver: HAYFORK CREEK
3.7 MI SOUTH OF S.R. 3, Trinity, CA
STATE ROUTE 3
FairOver: TRINITY RIVER
02-TRI-003-74.12, Trinity, CA
WILDWOOD ROAD
FairOver: CARR CREEK
0.1 MI E OF S.R. 3, Trinity, CA
RATTLESNAKE ROAD
FairOver: SALT CREEK
150' WEST OF S.R. 3, Trinity, CA
STATE ROUTE 3
FairOver: TANGLE BLUE CREEK
02-TRI-003-79.39, Trinity, CA
WEST VAN DUZEN RD
FairOver: VAN DUZEN RIVER
4.5 MI N OF ZENIA-RUTH RD, Trinity, CA
STATE ROUTE 36
FairOver: UPPER RATTLESNAKE CREEK
02-TRI-036-20.42, Trinity, CA
STATE ROUTE 299
FairOver: EAST WEAVER CREEK
02-TRI-299-52.13, Trinity, CA
RUTH DAM ROAD
FairOver: RUTH DAM
100' W MAD RIVER ROAD, Trinity, CA
CANYON CREEK ROAD
FairOver: CANYON CREEK
12.4 M N JUNCTION CITY, Trinity, CA
EAST HETTENSHAW RD
FairOver: VAN DUZEN RIVER
100' SOUTH RUTH-ZENIA RD, Trinity, CA
LITTLE BROWN CK RD
FairOver: LITTLE BROWNS CREEK
2.0 MI N/E S.R. 299, Trinity, CA
STATE ROUTE 299
FairOver: TRINITY RIVER
02-TRI-299-R58.00, Trinity, CA
EAST FORK ROAD
FairOver: POTATO CREEK
2.2 MI E WILDWOOD ROAD, Trinity, CA
STATE ROUTE 299
FairOver: GRASS VALLEY CREEK
02-TRI-299-65.45, Trinity, CA
TULE CREEK ROAD
FairOver: TULE CREEK
3.3 MI SW OF S.R. 3, Trinity, CA
TRINITY DAM BLVD
FairOver: TRINITY RIVER
.2 MI S/O RUSH CREEK RD, Trinity, CA
BROWNS MOUNTAIN RD
FairOver: TRINITY RIVER
0.3 MI W LEWISTON RD, Trinity, CA
STATE ROUTE 299
FairOver: INDIAN CREEK
02-TRI-299-59.68, Trinity, CA
UPPER MAD RIVER RD
FairOver: LITTLEFIELD CREEK
19.7 MI SOUTH OF S.R. 36, Trinity, CA
INDIAN CREEK ROAD
FairOver: INDIAN CREEK
3.3 MI W READING CRK RD, Trinity, CA
EAST FORK HYFK RD
FairOver: EAST FORK HAYFORK CREEK
3.7 MI E OF WILDWOOD ROAD, Trinity, CA
DUTCH CREEK ROAD
FairOver: TRINITY RIVER
0.3 MI S OF SR 299, Trinity, CA
SOUTH FORK ROAD
FairOver: KERLIN CREEK
3.8 MI N HYAMPOM RD, Trinity, CA
STATE ROUTE 3
FairOver: GRAVES CREEK
02-TRI-003-77.17, Trinity, CA
INDIAN CREEK ROAD
FairOver: INDIAN CREEK
6.9 MI E REDDING CREEK RD, Trinity, CA
NO DATA ENTERED
GoodOver: NO DATA ENTERED
S28 T27N R12W, Trinity, CA
WILDWOOD-MAD RIVER
GoodOver: DARK CANYON CREEK
NO DATA ENTERED, Trinity, CA
NO DATA ENTERED
GoodOver: BROWN'S CREEK
NO DATA ENTERED, Trinity, CA
LIMEDYKE LOOKOUT
GoodOver: INDIAN VALLEY CREEK
NO DATA ENTERED, Trinity, CA
BUTTER CREEK
GoodOver: BUTTER CREEK
NO DATA ENTERED, Trinity, CA
DOUBLE PLATE
GoodOver: POST CREEK
NO DATA ENTERED, Trinity, CA
PLUMMER PEAK
GoodOver: PHILPOT CREEK
NEAR PHILPOT CAMPGROUND, Trinity, CA
PHILPOT CAMPGROUND
GoodOver: NORTH FORK PHILPOT CREEK
PHILPOT CAMPGROUND, Trinity, CA
COUNTY LINE
GoodOver: BROWNS CREEK
NO DATA ENTERED, Trinity, CA
SOLDIER CR. ROAD
GoodOver: LIMESTONE CREEK
LIMESTONE CREEK, Trinity, CA
MAIN TULE CR. ROAD
GoodOver: TULE CREEK
NO DATA ENTERED, Trinity, CA
NO DATA ENTERED
GoodOver: SOLDIER CREEK
NO DATA ENTERED, Trinity, CA
PAPOOSE
GoodOver: PAPOOSE CREEK
NO DATA ENTERED, Trinity, CA
MULE CREEK
GoodOver: EAST FORK STUART FORK
NO DATA ENTERED, Trinity, CA
SWIFT CREEK
GoodOver: CEMENT CREEK
NO DATA ENTERED, Trinity, CA
SCORPION CREEK
GoodOver: NORTH FK. SCORPION CREEK
NO DATA ENTERED, Trinity, CA
SCORPION CREEK
GoodOver: SCORPION CREEK
NO DATA ENTERED, Trinity, CA
BOULDER LAKE
GoodOver: COFFEE CREEK
NO DATA ENTERED, Trinity, CA
E FORK NEW RIVER
GoodOver: NEW RIVER
NO DATA ENTERED, Trinity, CA
BOULDER LAKE
GoodOver: BOULDER CREEK
NO DATA ENTERED, Trinity, CA
WHALEN
GoodOver: CROW CREEK
NO DATA ENTERED, Trinity, CA
CEDAR CREEK
GoodOver: CEDAR CREEK
NO DATA ENTERED, Trinity, CA
HIGHLAND LAKES
GoodOver: EAST FORK TRINITY RIVER
NO DATA ENTERED, Trinity, CA
Read our methodology - how this data is sourced, computed, and verified.
Related
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.