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Every bridge in Trinity County, California

Name: Every bridge in Trinity County, California
Creator: Bridge Report Card
License: https://creativecommons.org/publicdomain/zero/1.0/

194 inventoried bridges, busiest first

United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled August 20, 2026

Trinity County, California, has 194 bridges in the 2025 National Bridge Inventory: 112 rated good, 75 fair, and 7 poor (as of August 20, 2026).
This index lists every one of them, busiest first; each links to its own condition record.

Bridge	Built	Vehicles/day	Condition
State Route 299 over East Weaver Creek	1962	7,125	Fair
State Route 299 over Little Browns Creek	1999	5,375	Good
State Route 299 over Weaver Creek	1953	5,375	Fair
State Route 299 over Trinity River	1980	4,450	Fair
State Route 299 over Indian Creek	1974	4,050	Fair
State Route 299 over Gray Creek	1966	3,800	Fair
State Route 299 over Trinity River	1990	3,800	Fair
State Route 299 over Trinity River	1991	3,800	Good
State Route 299 over Manzanita Creek	1923	3,650	Good
State Route 299 over Grass Valley Creek	1962	3,500	Fair
State Route 299 over Grass Valley Creek	1963	3,500	Fair
State Route 299 over Canyon Creek	1966	3,325	Fair
State Route 299 over North Fork Trinity River	1984	3,325	Good
State Route 299 over Big French Creek	1952	3,100	Good
State Route 299 over Pony Bar Creek	1966	3,080	Good
State Route 299 over Hillside	2017	2,650	Good
State Route 299 over Hillside	2017	2,650	Good
State Route 299 over Trinity River	1985	2,650	Good
Forest Avenue over Sydney Gulch	1949	1,946	Fair
State Route 3 over Big Creek	1938	1,750	Fair
State Route 3 over Carr Creek	1968	1,750	Good
State Route 3 over Browns Creek	1973	1,450	Good
State Route 3 over Little Creek	1955	1,450	Good
State Route 3 over Reading Creek	1968	1,450	Good
State Route 3 over Hayfork Creek	2006	1,405	Good
State Route 36 over Mad River	1958	1,300	Good
SR 3 over East Fork Stuart Fork CR	2008	865	Good
State Route 3 over Hillside	1986	865	Good
State Route 3 over Mule Creek	1960	865	Good
State Route 3 over Rush Creek	2000	865	Good
State Route 3 over Stuart Fork	1960	865	Good
Dutch Creek Road over Trinity River	1981	782	Fair
Salyer Loop Road over Trinity River	1996	751	Good
Turnpike Road over Trinity River	1902	751	Good
Tule Creek Road over Salt Creek	1947	670	Good
Tule Creek Road over Tule Creek	1947	670	Fair
State Route 3 over Coffee Creek	1962	645	Fair
State Route 3 over Swift Creek	2022	645	Good
Van Duzen Road over Cedar Creek	1977	578	Fair
Van Duzen Road over Holly Creek	1977	578	Good
West Van Duzen Rd over Shanty Creek	2014	578	Good
West Van Duzen Rd over Van Duzen River	2013	578	Good
State Route 36 over Lower Rattlesnake Creek	1969	560	Good
State Route 36 over Rattlesnake Creek	1975	560	Fair
State Route 36 over Rattlesnake Creek	1975	560	Good
State Route 36 over South Fork Trinity River	1979	560	Good
State Route 36 over Upper Rattlesnake Creek	1970	560	Fair
Dutch Creek Road over Soldier Creek	2006	500	Good
State Route 3 over Dobbins Gulch	1959	495	Good
State Route 3 over Salt Creek	1948	495	Fair
Rush Creek Road over Rush Creek	1958	489	Good
Trinity Dam Blvd over Trinity River	1963	450	Fair
Rattlesnake Road over Salt Creek	1966	440	Fair
Browns Ranch Road over East Weaver Creek	1955	439	Good
East Side Road over East Fork Trinity River	1960	420	Fair
East Side Road over Trinity River	1961	420	Good
Wildwood Road over Hayfork Creek	2016	400	Fair
Hyampom Road over Hayfork Creek	1948	330	Good
Hyampom Road over Hayfork Creek	1978	330	Good
Hyampom Road over Little Creek	1955	330	Poor
Lewiston Road over Grass Valley Creek	1965	330	Fair
Mill Street over Middle Weaver Creek	1986	330	Good
Wildwood Road over Carr Creek	1950	330	Fair
Wildwood Road over Hayfork Creek	1945	330	Fair
Denny Road over Trinity River	1989	302	Good
Corral Bottom Road over Trinity River	1960	300	Good
State Route 36 over Ditch Gulch	2022	300	Good
State Route 36 over Hayfork Creek	1965	300	Good
Summit Creek Road over Carr Creek	1987	300	Poor
Oak Ave over Hayfork Creek	2004	260	Fair
Evans Bar Road over Soldier Creek	2006	250	Good
State Route 3 over Coffee Creek Overflow	1968	230	Poor
State Route 3 over Scorpion Creek	1968	230	Fair
State Route 3 over Trinity River	1968	230	Fair
State Route 3 over Trinity River	1968	230	Fair
Browns Mountain Rd over Little Browns Creek	1997	202	Fair
Browns Mountain Rd over Trinity River	1983	200	Fair
East Fork Road over North Fork Trinity River	1967	200	Good
Lance Gulch Road over East Weaver Creek	2016	200	Good
State Route 3 over Graves Creek	1971	200	Good
State Route 3 over Minnehaha Creek	2012	200	Good
State Route 3 over Ramshorn Creek	1969	200	Good
State Route 3 over Sunflower Creek	1971	200	Good
State Route 3 over Trinity River	1969	200	Fair
State Route 3 over Trinity River	1969	200	Fair
State Route 3 over Trinity River	1971	200	Good
State Route 3 over Trinity River	1971	200	Fair
West Van Duzen Rd over Van Duzen River	2014	200	Fair
State Route 3 over Scott Mountain Creek	1982	190	Fair
State Route 3 over Scott Mountain Creek	1982	190	Good
Canyon Creek Road over Canyon Creek	1967	170	Good
Guy Covington Dr over E Fork of Stuarts Fork	1970	170	Fair
Ruth-zenia Road over Mad River	1991	167	Good
South Fork Road over Big Creek	1940	160	Fair
South Fork Road over Kerlin Creek	1960	160	Fair
South Fork Road over Pelletreau Creek	1967	160	Fair
South Fork Road over South Fork Trinity River	1970	160	Fair
Little Brown Ck Rd over Little Browns Creek	1974	155	Fair
Ruth-zenia Road over Little Van Duzen River	1971	140	Good
Zenia Bluff Rd over Mud Creek	2003	140	Good
Lorenz Street over Middle Weaver Creek	1950	125	Fair
State Route 3 over Tangle Blue Creek	1971	120	Fair
Price Ck Cmpbel Rd over Price Creek	1965	118	Fair
Oregon Street over West Weaver Creek	2000	103	Good
Big Creek Road over Packers Creek	2009	100	Good
Campbell Ridge Rd. over Campbell Ridge Slide	2006	100	Good
East Fork Road over Halls Gulch	2013	100	Good
Hoaglin Road over Kettenpom Creek	2006	100	Good
Steiner Flat Road over Dutton Creek	1950	100	Poor
Upper Mad River Rd over South Fork Mad River	2014	100	Good
Upper Mad River Rd over Van Horn Gulch	2014	100	Good
Ruth-zenia Road over Van Duzen River	1960	88	Fair
Ruth-zenia Road over Van Duzen River	2003	88	Good
Big Creek Road over Big Creek	1960	80	Fair
Coffee Creek Road over Coffee Creek	1977	76	Good
Coffee Creek Road over East Fork Coffee Creek	1987	76	Good
Coffee Creek Road over North Fork Coffee Creek	1977	76	Good
Coffee Creek Road over South Fork Coffee Creek	1979	76	Fair
Coffee Creek Road over Union Creek	1979	76	Fair
Canyon Creek Road over Clear Gulch	1955	75	Fair
Swift Creek Road over North Fork Swift Creek	1972	75	Fair
Ramshorn Road over Ramshorn Creek	1992	70	Good
Canyon Creek Road over Canyon Creek	1955	65	Fair
Eagle Crk Loop Rd over Minnehaha Creek	1974	60	Fair
Jordan Road over Little Creek	2017	60	Good
13 Dips Road over Salt Creek	1951	50	Fair
Barker CR. over Barker Creek	2010	50	Good
Bear Wallow over N.fork Rattlesnake Creek	1940	50	Fair
Boulder Lake over Boulder Creek	1987	50	Good
Boulder Lake over Coffee Creek	1965	50	Good
Butter Creek over Butter Creek	1975	50	Good
Cedar Creek over Bear Creek	1989	50	Good
Cedar Creek over Cedar Creek	1977	50	Good
County Line over Browns Creek	1934	50	Good
Double Plate over Post Creek	1966	50	Good
E Fork New River over New River	1966	50	Good
Eagle Crk Loop Rd over Eagle Creek	1975	50	Fair
Eagle Crk Loop Rd over Trinity River	2001	50	Good
East Fk Hayfork Rd over East Fork Hayfork Creek	1965	50	Fair
East Fk Hayfork Rd over Hayfork Creek	1971	50	Fair
East Fork Hyfk Rd over East Fork Hayfork Creek	2004	50	Fair
East Fork Road over Potato Creek	1950	50	Fair
Fawn Lodge Road over Grass Valley Creek	1959	50	Fair
Highland Lakes over East Fork Trinity River	1959	50	Good
Indian Valley over Butter Creek	1965	50	Good
Limedyke Lookout over Indian Valley Creek	1987	50	Good
Mad River Road over Dunbar Creek	2004	50	Good
Main Tule CR. Road over Tule Creek	2005	50	Good
May over Rattlesnake Creek	1959	50	Poor
Moores over Glen Creek	1950	50	Fair
Mule Creek over East Fork Stuart Fork	1967	50	Good
No Data Entered over Browns Creek	2007	50	Good
No Data Entered over Lick Creek	1978	50	Good
No Data Entered over No Data Entered	1974	50	Good
No Data Entered over No Data Entered	1974	50	Good
Papoose over Papoose Creek	1975	50	Good
Parks Creek over Little Trinity River	1974	50	Good
Philpot Campground over North Fork Philpot Creek	1966	50	Good
Plummer Peak over Philpot Creek	2002	50	Good
Rattlesnake Ridge over Rattlesnake Creek	1965	50	Good
Roundy Road over Little Browns Creek	2007	50	Good
Rusch Creek Road over Rusch Creek	2010	50	Fair
Scorpion Creek over North Fk. Scorpion Creek	1977	50	Good
Scorpion Creek over Scorpion Creek	1977	50	Good
Smith Creek over Baker Creek	1981	50	Fair
Soldier CR. Road over Limestone Creek	2005	50	Good
St. John Loop Road over Butter Creek	1955	50	Good
Swift Creek over Cement Creek	1972	50	Good
Whalen over Crow Creek	1977	50	Good
Wildwood-mad River over Dark Canyon Creek	1999	50	Good
Wildwood-mad River over Dubakella Creek	1972	50	Poor
Wildwood-mad River over E Fk So Fk Trinity River	1980	50	Fair
Wildwood-mad River over South Fork Trinity River	1963	50	Good
Powerhouse Road over Canyon Creek	1935	49	Fair
Deerlick Spring Rd over Browns Creek	2005	47	Good
Coffee Creek Road over Adams Creek	2017	45	Good
Coffee Creek Road over Coffee Creek	2017	42	Good
Indian Creek Road over Indian Creek	1976	35	Fair
Mad River Road over Olsen Creek	2002	31	Good
Upper Mad River Rd over Littlefield Creek	1955	31	Fair
Upper Mad River Rd over Mad River	1988	31	Good
No Data Entered over Soldier Creek	2009	30	Good
Ruth Dam Road over Ruth Dam	1972	30	Fair
Blanchard Flat Rd over Redding Creek	1969	25	Fair
B-bar-k Road over Browns Creek	1949	20	Fair
Canyon Creek Road over Little E Fork Canyon Crk	2002	20	Good
Indian Creek Road over Indian Creek	1955	20	Fair
No Data Entered over Goods Creek	2006	20	Good
Price Creek Rd over Price Creek	1950	20	Poor
E. Fork Hayfork Rd over N Fk E Fk Hayfork Creek	2017	17	Good
East Fork Road over E Fk of N Fk Trinity Riv	1938	15	Fair
Long Ridge Road over Salt Creek	1950	15	Fair
Ramshorn Road over Mumbo Creek	2017	15	Good
East Hettenshaw Rd over Van Duzen River	1950	10	Fair

Source: FHWA National Bridge Inventory, 2025.

Trinity County bridge conditions · California bridges by county.

Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.