Home › California › Lassen County › All bridges

Every bridge in Lassen County, California

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

108 inventoried bridges, busiest first

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

Lassen County, California, has 108 bridges in the 2025 National Bridge Inventory: 28 rated good, 72 fair, and 8 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 36 over Jensen Slough	1964	15,300	Good
State Route 36 over Susan River	1964	15,300	Fair
State Route 36 over Gold Run Creek	1964	10,300	Good
U.S. Highway 395 over Galeppi Uc	1969	5,500	Fair
U.S. Highway 395 over Long Valley Creek	1956	5,500	Fair
U.S. Highway 395 over Long Valley Creek	1946	5,500	Fair
U.S. Highway 395 over Long Valley Creek	1946	5,500	Good
U.S. Highway 395 over Long Valley Creek Ovfl	1969	5,500	Fair
U.S. Highway 395 over UP RR & BNSF Ry	1969	5,500	Fair
U.S. Highway 395 over Willow Ranch Creek	1969	5,500	Fair
Alexander Ave over Susan River	1986	4,850	Fair
U.S. Highway 395 over Evans Canyon Rd	1976	4,600	Fair
U.S. Highway 395 over Evans Canyon Rd	1976	4,600	Fair
U.S. Highway 395 over Scott Uc	1976	4,600	Good
U.S. Highway 395 over Scott Uc	1976	4,600	Good
U.S. Highway 395 over State Route 70	1976	4,600	Fair
U.S. Highway 395 over State Route 70	1976	4,600	Good
Park Riverside Dr over Susan River	1973	4,500	Good
State Route 70 over Long Valley Creek	1952	4,200	Fair
State Route 70 over UP RR	1953	4,200	Fair
Richmond Road over Susan River	1995	3,300	Fair
U.S. Highway 395 over Standish Irrig. Canal	1936	2,975	Good
State Route 36 over Susan River	1966	2,900	Fair
State Route 36 over Goodrich Creek	2021	2,300	Good
State Route 36 over Robbers Creek	1924	2,300	Fair
Skyline Road over Susan River	2019	2,000	Good
CR 518 (spalding) over Pine Creek	1976	1,800	Good
State Route 299 over BNSF Ry	1977	1,800	Good
State Route 299 over Pit River	1925	1,800	Fair
State Route 299 over Pit River Overflow	1925	1,800	Fair
State Route 299 over Pit River Overflow	1925	1,800	Fair
State Route 299 over Pit River Overflow	1925	1,800	Fair
State Route 299 over Pit River Overflow	1925	1,800	Fair
State Route 299 over Pit River Overflow	1925	1,800	Fair
U.S. Highway 395 over Susan River	1954	1,775	Good
U.S. Highway 395 over Dill Slough	1992	1,700	Fair
U.S. Highway 395 over Susan River Overflow	1992	1,700	Fair
CR A21 / Mooney Rd over Robbers Creek	1975	1,500	Poor
Leavitt Ln (CR213) over Susan River Overflow	2009	1,500	Fair
State Route 299 over Raines Creek	1931	1,500	Good
C.R. 301 over Baxter Creek	1970	1,200	Fair
Conservation Ctr R over Brockman Slough	1969	1,200	Good
U.S. Highway 395 over South Termo Ditch	1971	1,200	Fair
State Route 299 over Bieber Creek	1928	1,050	Good
State Route 299 over Willow Creek	1929	1,050	Good
Bieber Lookout Rd over Ash Creek	1966	800	Fair
Herlong Access Rd over Long Valley Creek	1979	800	Good
C.R. 203 over Gold Run Creek	1967	600	Fair
C.R. 203 over Lassen Creek	1967	600	Fair
Center Rd over Willow Creek	1975	600	Fair
Johnstonville Rd over Lassen Creek	1924	600	Fair
Johnstonville Rd over Susan River	1921	600	Fair
State Route 139 over Meadow Channel	1966	550	Good
State Route 139 over Willow Creek	1966	550	Good
Garnier Rd over Long Valley Creek	1956	500	Fair
Lassen St over Susan River	1965	400	Fair
Surprise Valley Rd over Bare Creek	1965	400	Fair
Chappius Lane over Susan River	1986	300	Fair
C.R. 353 over Brownell Creek	1923	200	Fair
C.R. 353 over Mcclay Creek	1923	200	Fair
CR 417(PUNKIN Ctr) over Muddy Slough No 2	1955	200	Fair
CR417 (punkin Ctr) over Muddy Slough No 1	1955	200	Poor
Johnstonville Rd over Sand Slough	1922	200	Fair
Rd 305 over Susan River Overflow #8	1971	200	Fair
on County Road 320 over Skedaddle Creek	1988	200	Fair
CR302 (lambert Ln) over Hartson Slough	2011	166	Good
CR 305 (mapes Rd) over Whitehead Slough	1978	162	Poor
CR527 (ash Valley) over No Name Creek	1990	160	Fair
County Rd 311 over Deep Cut (baxter) Creek	1988	150	Good
Cr312-blickenstaff over Deep Cut (baxter) Creek	2002	130	Fair
Mapes Lane Rd 305 over Susan River Overflow # 3	2016	130	Fair
Mapes Lane Rd 305 over Susan River Overflow # 5	2016	130	Fair
Rd 424 (bassett) over Willow Creek	1960	120	Poor
CR 111 (pittville) over Beaver Creek	1975	100	Poor
CR 305 (mapes Rd) over Hartson Slough	1978	100	Fair
CR213 (leavitt Ln) over Susan River	1970	100	Fair
CR213 (leavitt Ln) over Susan River Overflow	1973	100	Fair
CR246 (belfast Rd) over Willow Creek	1975	100	Poor
CR306 (capezolli) over Whitehead Slough	1950	100	Fair
County Road 311 over Deep Cut (baxter) Creek	1978	100	Fair
Eagle Lake Rd over Pine Creek	1965	100	Fair
Fish and Game Road over Susan River	1938	100	Fair
Mapes Lane Rd 305 over Susan River Overflow #4	2000	100	Fair
Mccoy Rd over Susan River	1989	100	Good
Rd 302 (lambert) over Hartson Slough Overflow	2011	100	Good
Rd 303 (galeppi) over Hartson Slough	1978	100	Fair
Rd 304 (alexander) over South Fork Dill Slough	1930	100	Fair
Rd 304 over Hartson Slough	1978	100	Fair
Rd 304 over South Fork Dill Slough	1978	100	Fair
Rd 304 over Whitehead Slough	1930	100	Poor
Rd 305 (mapes Rd) over Susan River Overflow #6	1978	100	Fair
Rd 305 over Susan River Overflow #14	1977	100	Fair
Rd 306 (capezolli) over Hartson Slough	1979	100	Fair
Rd 311 over Deep Cut (baxter) Creek	1978	100	Poor
Rd 315 over Susan River	1987	100	Fair
Rd 318 over Susan River	1975	100	Fair
Scott Road over Long Valley Creek	1975	100	Fair
Travis Lane over Brockman Slough	1981	100	Fair
Hackstaff Road over Long Valley Creek	2021	80	Fair
Hackstaff Road over Long Valley Creek	2021	80	Good
Armstrong Road over Willow Creek	1995	50	Good
C.R. 353 over Parker Creek	1923	50	Fair
CR316 (mcclelland) over North Fork Dill Slough	1978	50	Fair
Scott Rd over Scott Creek	1954	50	Fair
No Data Entered over Pine Creek	1961	20	Good
Road 30n03 over Susan River	1972	20	Fair
Road 30n06 over Susan River	1976	20	Fair
Bert Road over Long Valley Crk Ovrflow	1968	10	Good

Source: FHWA National Bridge Inventory, 2025.

Lassen County bridge conditions · California bridges by county.

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