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Every bridge in Humboldt County, California

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

399 inventoried bridges, busiest first

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

Humboldt County, California, has 399 bridges in the 2025 National Bridge Inventory: 169 rated good, 209 fair, and 21 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
U.S. Highway 101 over Orchard Ave	1963	25,700	Good
US Highway 101 NB over Palmer Blvd	1958	22,000	Fair
US Highway 101 SB over Palmer Blvd	1958	22,000	Fair
U.S. Highway 101 over US 101 On&off Ramp Ncrra	1962	21,700	Fair
U.S. Highway 101 over Finch Creek Road	1958	21,500	Good
U.S. Highway 101 over Finch Creek Road	1958	21,500	Good
U.S. Highway 101 over Salmon Creek	1957	21,500	Good
US Highway 101 over State Route 211	1957	20,400	Fair
US Highway 101 SB over Mad River	2011	18,500	Good
US Highway 101 NB over Jacoby Creek	1955	18,125	Good
US Highway 101 SB over Jacoby Creek	2022	18,125	Good
U.S. Highway 101 over Kenmar Road	1962	17,900	Good
US Highway 101 NB over Gannon Slough	1955	17,500	Good
US Highway 101 NB over West End Rd Creek Ncrra	1929	17,500	Poor
US Highway 101 SB over Gannon Slough	1996	17,500	Fair
US Highway 101 SB over West End Rd Creek Ncrra	1956	17,500	Good
US Highway 101 NB over Eureka Slough	1956	17,000	Good
US Highway 101 SB over Eureka Slough	1943	17,000	Fair
US Highway 101 NB over Airport Road	1964	16,500	Good
US Highway 101 NB over Mad River	2012	16,500	Fair
US Highway 101 NB over N Central Ave	1964	16,500	Good
US Highway 101 SB over Airport Road	1964	16,500	Good
US Highway 101 SB over N Central Ave	1964	16,500	Good
US Highway 101 NB over Elk River	1988	16,200	Fair
US Highway 101 NB over King Salmon Ave	1963	16,200	Fair
US Highway 101 SB over Elk River	1956	16,200	Fair
US Highway 101 SB over King Salmon Ave	1963	16,200	Fair
U.S. Highway 101 over Rohner Creek	1962	15,000	Good
U.S. Highway 101 over Strongs Creek	1962	13,000	Fair
US Highway 101 NB over Scenic Way	1976	13,000	Fair
US Highway 101 SB over Van Duzen River	2007	13,000	Good
U.S. Highway 101 over Boyd Draw	1959	12,900	Fair
U.S. Highway 101 over Jones Slough	1959	12,900	Fair
U.S. Highway 101 over Turner Draw	1956	12,900	Fair
US Highway 101 over S101-main On&off Ncrra	1962	12,800	Fair
State Route 299 over US Highway 101	1956	12,400	Good
SR 255 over U.S. Highway 101	1965	12,200	Fair
Fortuna Boulevard over Strongs Creek	1949	11,988	Fair
State Route 299 over Essex Lane	1965	11,200	Fair
State Route 299 over Glendale Dr	1965	11,200	Fair
State Route 299 over Lindsay CR Fieldbrook Rd	1965	11,200	Fair
Main Street over Rohner Creek	1922	11,181	Fair
Guintoli Lane over US Highway 101	1969	11,131	Fair
U.S. Highway 101 over State Route 283	1976	11,000	Fair
U.S. Highway 101 over Pacific Lumber Co Rd	1979	10,800	Good
U.S. Highway 101 over Little River	1964	10,500	Good
State Route 299 over Blue Lake Blvd	1970	9,700	Fair
State Route 299 over Maint Rd	1965	9,700	Fair
State Route 299 over Mill Creek	1965	9,700	Good
State Route 299 over Ramp Road	1965	9,700	Fair
Fairway Dr over Martin Slough	1964	9,240	Fair
U.S. Highway 101 over Westhaven Drive	1960	8,800	Fair
Myrtle Ave over Ryan Slough	1955	8,530	Good
US Highway 101 SB over Eel Riv Edwards Dr Ncrra	1976	8,200	Fair
US Highway 101 over Stafford Road	1971	7,500	Fair
State Route 255 over Eureka Channel	1971	7,300	Fair
State Route 255 over Marina Road	1979	7,300	Fair
State Route 255 over Middle Channel	1971	7,300	Fair
State Route 255 over Samoa Channel	1971	7,300	Fair
Myrtle Ave over Freshwater Creek	1983	7,009	Good
Myrtle Ave over Freshwater CR Overflow	1984	6,908	Good
U.S. Highway 101 over Barkdull Road	1966	6,890	Good
US Highway 101 over St Rte 254 (jordan Rd)	1966	6,890	Fair
School Road over US Highway 101	1964	6,800	Good
US Highway 101 NB over Van Duzen River	1996	6,800	Fair
U.S. Highway 101 over Hooker Creek Road	1965	6,700	Good
Redwood Dr over US Highway 101	1966	6,400	Fair
Sunset Ave over US Highway 101	1976	6,378	Good
U.S. Highway 101 over Newton Road	1961	6,190	Good
U.S. Highway 101 over Sfk Eel River Mattole Rd	1958	6,190	Good
U.S. Highway 101 over Sorenson Road	1967	6,190	Good
U.S. Highway 101 over Greenlaw Creek	1966	6,100	Fair
U.S. Highway 101 over Bear Creek	1967	6,000	Fair
U.S. Highway 101 over S101-st Rte 254	1958	6,000	Good
US Highway 101 NB over Jordan Creek	1966	6,000	Good
U.S. Highway 101 over Dimmick Road	1964	5,900	Good
U.S. Highway 101 over Eel River & Ncrra	1965	5,900	Good
US Highway 101 over SR 254 South Fork Eel Rv	1964	5,900	Good
Redwood Dr over Bear Gulch	2004	5,870	Fair
State Route 211 over Salt River	1951	5,700	Good
State Route 211 over Salt River Overflow	1964	5,700	Good
U.S. Highway 101 over Benbow Dr (old US 101)	1975	5,700	Fair
U.S. Highway 101 over E Branch S Frk Eel Riv	1968	5,700	Good
U.S. Highway 101 over Oakcrest Court	1969	5,700	Good
U.S. Highway 101 over South Fork Eel River	1969	5,700	Good
U.S. Highway 101 over South Fork Eel River	1969	5,700	Good
Guintoli Lane over State Route 299	1969	5,644	Good
14TH St over US Highway 101	1976	5,597	Fair
US Highway 101 NB over Eel Riv Edwards Dr Ncrra	1976	5,500	Good
Redwood Hwy over May Creek	1989	5,450	Fair
U.S. Highway 101 over Hillside	1963	5,450	Good
U.S. Highway 101 over Williford Road	1961	5,450	Good
US Highway 101 over SR 254 Ave of the Giants	1963	5,450	Good
U.S. Highway 101 over St Rte 254-s101 on Ramp	1958	5,400	Fair
State Route 211 over Eel River	1911	5,300	Fair
State Route 211 over Old River	1964	5,300	Good
State Route 211 over Old River	1964	5,300	Fair
G Street over US Highway 101	1976	5,209	Fair
U.S. Highway 101 over Bear Butte Road	1962	5,100	Good
U.S. Highway 101 over Gibney Drive	1964	5,100	Fair
U.S. Highway 101 over Maple Hill Rd Salmon Crk	1962	5,100	Fair
Herrick Ave over US Highway 101	1984	5,000	Good
U.S. Highway 101 over Dean Crk Rd & Dean Creek	1967	5,000	Poor
U.S. Highway 101 over South Fork Eel River	1962	5,000	Fair
Rohnerville Road over Strongs Creek	1915	4,924	Fair
U.S. Highway 101 over Trinidad Road	1960	4,900	Fair
Elk River Road over Martin Slough	1992	4,801	Good
State Route 299 over Mad River	1965	4,775	Poor
State Route 299 over Mad River	1948	4,775	Good
U.S. Highway 101 over Benbow Dr & S Fk Eel Riv	1980	4,500	Fair
U.S. Highway 101 over Richardson Grove Park Rd	1958	4,500	Good
State Route 299 over Hillside	1966	4,400	Good
State Route 299 over South Fork Trinity River	1988	4,400	Good
US Highway 101 NB over Eel River	1941	4,400	Fair
US Highway 101 NB over Van Duzen River Overflow	1952	4,400	Good
US Highway 101 SB over Eel River	1974	4,400	Good
US Highway 101 SB over Scenic Way	1976	4,400	Fair
US Highway 101 SB over Van Duzen River Overflow	1952	4,400	Good
Redwood Way over Strongs Creek	1988	4,353	Good
State Route 255 over Mad River Slough	1981	4,300	Good
U.S. Highway 101 over Mcdonald Creek	1972	4,300	Good
U.S. Highway 101 over Big Lagoon	1958	4,200	Fair
U.S. Highway 101 over Little Lost Man Creek	2020	4,200	Good
U.S. Highway 101 over Patricks Point Dr	1970	4,200	Fair
U.S. Highway 101 over Seawood Dr	1970	4,200	Fair
State Route 255 over Mcdaniel Slough	1963	4,160	Fair
State Route 36 over US Highway 101	2010	4,000	Good
U.S. Highway 101 over Redwood Creek	1988	3,750	Good
U.S. Highway 101 over Redwood Creek Overflow	1950	3,750	Good
U.S. Highway 101 over Lost Man Creek	1986	3,700	Good
U.S. Highway 101 over Prairie Creek	1989	3,700	Fair
US Highway 101 SB over Jordan Creek	1971	3,600	Fair
State Route 299 over North Fork Mad River	1969	3,500	Good
Seventh St over US Highway 101	1966	3,435	Fair
State Route 299 over East Fork Willow Creek	1956	3,200	Fair
State Route 299 over Redwood Creek	1965	3,200	Fair
State Route 299 over Willow Creek	1955	3,200	Fair
State Route 299 over Willow Creek	1956	3,200	Good
12TH St over Rohner Creek	1935	3,160	Fair
Humboldt Hill Road over US Highway 101	1963	3,100	Poor
U.S. Highway 101 over Boyes Creek	1989	3,100	Good
U.S. Highway 101 over Newton B Drury Scenic Pk	1990	3,100	Fair
Old Arcata Rd over Jacoby Creek	1988	3,030	Good
Murray Road over US Highway 101	1964	3,000	Good
11TH St over US Highway 101	1976	2,956	Fair
Country Club Rd over Trinity River	1957	2,947	Fair
State Route 96 over Hillside	1985	2,900	Good
State Route 96 over Hillside	1985	2,900	Fair
State Route 96 over Willow Creek	1965	2,900	Good
State Route 96 over Supply Creek	1991	2,850	Good
State Route 36 over Yager Creek	1968	2,800	Fair
Hiller Road over US Highway 101	1964	2,500	Good
SR 200 (central) over US Highway 101	1964	2,500	Good
Twelfth St over U.S. Highway 101	1962	2,500	Fair
Briceland-thorne over South Fork Eel River	1966	2,468	Fair
Riverwalk Drive over Strongs Creek	1962	2,322	Good
State Route 283 over Eel River & Nwp RR	1941	2,150	Fair
Saint Louis Rd over US Highway 101 & Ncrra	1976	2,099	Fair
East Frontage Road over Pedestrian Walkway	1976	2,000	Good
East Frontage Road over Pedestrian Walkway	1976	2,000	Fair
State Route 169 over Cappell Creek	2012	2,000	Good
State Route 169 over Mawah Creek	2012	2,000	Good
State Route 169 over Rube Ranch Creek	2012	2,000	Good
Redwood Dr over Dean Creek	1933	1,978	Fair
Briceland Rd over Redwood Creek	1935	1,836	Fair
Briceland-thorne over Redwood Creek	1938	1,836	Fair
Briceland-thorne over Redwood Creek	1959	1,836	Fair
SR 200 (N Bank Rd) over State Route 299	1965	1,800	Good
King Salmon Dr over King Salmon Slough	1988	1,782	Fair
State Route 36 over Grizzly Creek	1996	1,650	Good
State Route 36 over Hely Creek	1927	1,650	Good
State Route 36 over Van Duzen River	1965	1,650	Good
State Route 36 over Van Duzen River	1984	1,650	Fair
State Route 36 over Van Duzen River	1985	1,650	Good
Glendale Dr over Lindsay Creek	1995	1,520	Good
State Route 96 over Hillside	1966	1,505	Fair
State Route 96 over Hillside	1964	1,505	Good
State Route 96 over Hillside	1964	1,505	Fair
State Route 96 over Hostler Creek	1992	1,505	Good
State Route 96 over Mill Creek	1993	1,505	Good
State Route 96 over Trinity River	1957	1,505	Good
Irr Bia Rte 541A over Supply Creek	1966	1,500	Fair
Briceland-thorne over China Creek	1959	1,328	Fair
Shelter Cove Rd over Mattole River	1981	1,302	Good
Davis St over US Highway 101	1976	1,234	Good
State Route 36 over Butte Creek	1960	1,200	Fair
State Route 36 over Little Larabee Creek	1960	1,200	Good
State Route 36 over South Fork Van Duzen Riv	1962	1,200	Fair
State Route 36 over Van Duzen River	1965	1,200	Fair
State Route 36 over Van Duzen River	1997	1,200	Good
Fieldbrook Rd over Squaw Creek	1951	1,173	Good
Alderpoint Road over US Highway 101	1966	1,120	Fair
State Park Road over South Fork Eel River	1969	1,100	Poor
Sprowel Creek Road over South Fork Eel River	1982	1,085	Good
State Route 96 over Camp Creek	1949	1,085	Fair
Bridge St over Scotia Mill Pond	1974	1,055	Fair
Hatchery Road over Mad River	1983	1,016	Fair
Maple Hills Rd over South Fork Eel River	1957	1,005	Fair
Mattole Rd over Cuneo Creek	1966	1,000	Good
Sprowl Creek Road over US Highway 101	1967	1,000	Fair
State Route 36 over Van Duzen River	1981	1,000	Good
State Route 96 over Klamath River (orleans)	1966	990	Good
Hookton Road over US Highway 101	1962	950	Fair
Painter St over US Highway 101	1976	890	Fair
Waddington Rd over Salt River	2016	890	Fair
Davison Rd over Prairie Creek	1988	875	Fair
Grizzly Bluff Road over Williams Creek	2019	800	Good
Loleta Dr over US Highway 101	1962	800	Good
State Route 96 over Klamath River	1949	710	Fair
6TH Street over US Highway 101	1960	700	Fair
Mattole Road over Davis Creek	1998	700	Good
State Route 254 over Ohman Creek	1939	690	Good
Eel River Drive over Salmon Creek	1929	644	Good
Benbow Dr over Fish Creek	1967	627	Good
Lake Benbow Dr over E Br South Fork Eel Riv	1932	627	Good
Maple Creek Road over North Fork Mad River	1928	624	Poor
Crannell Road over US Highway 101	1964	600	Good
Mattole Rd over Harper Creek	1977	600	Fair
State Route 254 over Bridge Creek	1938	565	Fair
State Route 254 over Elk Creek	1940	565	Good
State Route 254 over Hillside	1989	565	Good
State Route 254 over Hillside	1995	565	Good
State Route 254 over U.S. Highway 101	1961	565	Good
State Route 96 over Aikens Creek	1960	560	Good
State Route 96 over Bluff Creek	1960	560	Good
Dinsmore Drive over Rohner Creek	1962	556	Good
State Route 96 over Bluff Creek	1967	540	Good
State Route 96 over Slate Creek	1960	540	Fair
Berta Rd over Elk River	1936	518	Fair
Mattole Rd over Mattole River	1920	514	Fair
Arlington Avenue over Francis Creek	2001	500	Fair
Chambers Road over Mill Creek	2015	500	Fair
Mattole Rd over Bull Creek	1966	500	Fair
Port Kenyon Road over Francis Creek	2015	500	Good
Hookton Road over Salmon Creek	1922	486	Poor
Bald Hills Road over Prairie Creek	1957	479	Poor
Carson Woods Road over Rohner Creek	1996	472	Good
West End Road over Warren Creek	1927	472	Fair
State Route 254 over South Fork Eel River	1931	460	Good
Centerville Road over Fleener Creek	1952	444	Fair
Pine Creek Rd over Soctish Creek	1950	437	Fair
Cannibal Road over Mosley Slough	1959	434	Fair
Red Cap Road over Big Rock Gulch	2019	425	Good
Briceland Thorn Rd over Vanarken Creek	1961	420	Fair
Briceland-thorne over Mckee Creek	1952	420	Fair
Mattole Rd over Mattole River	1958	412	Poor
State Route 96 over Pearch Creek	1974	400	Good
Thomas Road over Salmon Creek	1962	395	Fair
Dillon Road over Salt River	1994	371	Good
Port Kenyon Road over Salt River Overflow	1962	351	Good
River Bar Road over Barber Creek Wash	1970	351	Fair
Fort Seward Rd over Eel River	1958	350	Fair
Maple Hills Road over Salmon Creek	1982	349	Good
Blue Slide Rd over Howe Creek	1978	346	Good
State Route 169 over Martins Ferry School Crk	2012	345	Good
State Route 254 over Bear Creek	1939	330	Good
State Route 254 over Greenlaw Creek	1959	330	Fair
Jackson Ranch Rd over Liscomb Slough	1960	327	Good
State Route 169 over Coon Creek	1988	320	Good
State Route 169 over Miners Creek	1995	320	Fair
State Route 169 over Rock Chute Creek	1991	320	Good
State Route 169 over Rube Creek	1970	320	Good
Benbow Drive over E Br South Fork Eel Riv	1970	316	Good
Mattole Rd over Bull Creek	1956	310	Fair
N101-dean Crk Rd over Dean Creek	1967	310	Good
Mattole Road over Singley Creek	1959	308	Fair
Carson Woods Road over Rohner Creek	1959	303	Good
Blue Slide Road over Price Creek	1959	302	Fair
Salmon Creek Road over Salmon Creek	1959	300	Fair
State Park Road over Upper Durphy Creek	1965	300	Fair
Alderpoint Rd over South Dobbyn Creek	1937	281	Poor
Briceland Road over Redwood Creek (redway)	1938	260	Fair
State Route 169 over Pecwan Creek	1961	260	Good
Coffee Creek Road over Perry Slough	1931	254	Fair
Alderpoint Road over Cooper Creek	1952	250	Fair
Briceland Road over Redwood Creek	1949	250	Fair
Fulmor Road over Salt River	1950	246	Fair
Alderpoint Rd over Eel River & Nwp RR	1972	240	Fair
Mattole Road over Indian Creek	2010	240	Good
Mattole Road over Bear River	1974	231	Fair
Salmon Creek Road over Salmon Creek	1959	226	Poor
Mattole Road over North Fork Mattole River	1961	219	Fair
Mattole Road over Mattole River	1935	205	Fair
Alderpoint Road over North Dobbyn Creek	1966	201	Fair
Etsbrg Hnydew Rd over Mattole River	1928	200	Fair
Irr Bia Rte 15 over Hostler Creek	1962	200	Good
Mattole Road over Little Dry Creek	2018	200	Fair
Mattole Rd over Dry Creek	1985	196	Fair
Mattole Road over Mattole River	1973	196	Fair
Salmon Creek Road over US Highway 101	1962	190	Good
Wilder Ridge Rd over Honeydew Creek	1990	189	Good
Mattole Rd over Domingo Creek	1926	183	Fair
Mattole Road over Mcnutt Creek	1996	180	Fair
Tompkins Hill Road over Salmon Creek	1929	179	Good
Alderpoint Road over Burr Creek	1960	173	Fair
Howard Heights Rd over Freshwater Creek	1949	172	Fair
Mattole Road over Woods Creek	1976	171	Fair
Sprowel Creek Road over Sprowel Creek	1959	163	Fair
Brookwood Drive over Jacoby Creek	1967	162	Fair
Bear Canyon Road over South Fork Eel River	2000	158	Fair
Elk River Road over North Fork Elk River	1923	156	Fair
Pesula Road over US Highway 101	1961	155	Fair
Cappell Rd over Mareep Creek	1965	150	Fair
Burrel Road over Upper N Fk Mattole Riv	1961	142	Fair
Ishi Pishi Road over Wilson Creek	1975	132	Fair
Williams Creek Rd over Williams Creek	2016	130	Fair
Wilder Ridge Road over Beartrap Creek	1960	128	Fair
Alderpoint Rd over Larabee Creek	1966	124	Fair
Alderpoint Rd over Martin Creek	1972	124	Fair
Ishi Pishi Rd over Ranger Flat Draw	1950	122	Fair
Geneva Road over Little Lost Man Creek	2021	120	Good
Geneva Road over Lost Man Creek	1973	120	Good
Price Creek Road over Price Creek	1940	118	Fair
S Quarry Road over Jacoby Creek	1971	115	Fair
Alderpoint Rd over Conley Creek	1990	114	Fair
Bair Road over Redwood Creek	1950	113	Fair
Forest Road over South Fork Eel River	1965	110	Fair
Alderpoint Rd over Larabee Creek	1960	107	Fair
Alderpoint Rd over Mcmahon Creek	1958	106	Good
Maple Creek Road over Boulder Creek	1923	106	Fair
Butler Valley Rd over Mad River	1937	105	Fair
Butler Valley Rd over Maple Creek	1929	105	Good
Freshwater Pool Rd over Freshwater Creek	1972	100	Fair
Holmes Flat Rd over Eel River	1999	100	Fair
Holmes Flat Road over Larabee Low Level-eel Ri	1960	100	Poor
Island Mountain Rd over Chamise Creek	1973	100	Fair
Mccann Road over Eel River	1965	100	Fair
Old Mattole Rd over Mcnutt Creek	1926	100	Fair
Red Cap Road over Boise Creek	1995	91	Good
Zenia Bluff Rd over South Dobbyn Creek	1949	85	Poor
Price Creek Road over Price Creek	1981	82	Fair
Chezem Rd over Redwood Creek	1916	78	Fair
Kings Peak Road over North Fork Bear Creek	1993	75	Good
Upper Bear Riv Rd over Bear River	1968	75	Fair
Ishi Pishi Rd over Klamath River	1967	71	Fair
Bair Road over Supply Creek	1950	69	Fair
Smith Point over South Fork Eel River	1934	69	Fair
Howe Creek Road over Atwell Creek	1960	68	Fair
Howe Creek Road over Howe Creek	1980	68	Good
Price Creek Road over Price Creek	1996	67	Good
Golden Gate Dr over Van Duzen River	1985	58	Good
Shiveley Road over Shiveley Creek	1960	58	Fair
Stover Rd over Molasses Creek	1962	56	Good
Stover Road over Mill Creek	1961	56	Good
Maple Creek Rd over Canyon Creek	1951	55	Fair
Whitlow Rd over Sonoma Creek	1986	53	Good
Whitlow Road over Sonoma Creek #1	1966	53	Fair
Whitlow Road over Sonoma Creek #2	1966	53	Fair
33007: Butte Creek over Butte Creek	1980	50	Poor
Albert Etter Ra Rd over Bear Creek	1985	50	Fair
Davison Road over Prairie Creek	1970	50	Fair
Jack Shaw Road over Billings Creek	1987	50	Fair
Lindley Road over Mattole River	1925	50	Poor
No Data Entered over 051054000001005	1973	50	Good
No Data Entered over Grouse Creek	1997	50	Good
No Data Entered over N Fork Red Cap Creek	1967	50	Good
No Data Entered over No Data Entered	1980	50	Poor
No Data Entered over No Data Entered	1974	50	Good
No Data Entered over No Data Entered	1981	50	Poor
No Data Entered over No Data Entered	1966	50	Good
No Data Entered over No Data Entered	1988	50	Good
No Data Entered over No Data Entered	1957	50	Good
No Data Entered over No Data Entered	1978	50	Good
No Data Entered over No Data Entered	1983	50	Good
No Data Entered over Red Cap Creek	1977	50	Fair
Steelhead Rd over Powers Creek	2007	50	Fair
Lanphere Road over Mad River Slough	1988	45	Good
Bald Hills Road over Klamath River	1959	43	Fair
Irr Bia Rte 18 over Pine Creek	1977	40	Fair
Price Creek Road over Price Creek	1953	39	Fair
Price Creek Road over Sweet Creek	1959	39	Good
Fort Seward Road over Dobbyn Creek	1960	38	Fair
Maple Creek Rd over Maple Creek	1955	38	Poor
Zanes Rd over Elk River	1936	38	Fair
Morgan Slough Road over Morgan Slough	1984	31	Good
North Fork Road over Mattole Creek	1996	30	Fair
Sandy Prairie Road over Van Duzen River Overflow	2009	30	Good
Williams Creek Rd over Williams Creek	1950	30	Fair
Kneeland Road over Lawrence Creek	1949	28	Fair
U. Bear River Road over Arroyo Creek	1960	27	Fair
Upper Bear Riv Rd over Bear River	1960	27	Fair
Cockrobin Isld Rd over Eel River	1961	25	Fair
Devoy Rd over Freshwater Slough	1986	24	Good
Conklin Creek Road over East Mill Creek	2003	20	Fair
Elinor Road over Greenlow Creek	1988	20	Fair
Howe Creek Road over Howe Creek	2006	19	Fair
Holmes Flat Rd over Larabee Creek	1966	17	Good
Maple Creek Road over Heath Creek	1961	17	Fair
Bear River Road over Bonanza Gulch	1986	15	Good
Nissen Lane over Nissen Slough	1952	13	Fair
Access Road to Cdf over Browns Creek	2012	12	Fair
Albee Ck Camp over Albee Creek	1986	10	Poor
Irr Bia Rte 11 over Pine Creek	1977	10	Fair
Irr Bia Rte 3 over Tully Creek	1972	10	Fair
Kneeland Rd over North Fork Yager Creek	1964	10	Poor
Prescott Drive over Johnson Gulch	1973	9	Fair
Shower Pass Rd over Olsen Creek	1966	7	Fair
Lighthouse Road over Mill Creek	2003	3	Good
Grasshopper Lkt Rd over Squaw Creek	1983	1	Poor

Source: FHWA National Bridge Inventory, 2025.

Humboldt County bridge conditions · California bridges by county.

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