Del Norte County, CA

96 public highway bridges

Del Norte County Bridge Snapshot

Del Norte County, California contains 96 public highway bridges in the FHWA National Bridge Inventory. Roughly 47.9% are rated “Good,” 36.5% “Fair,” 11.5% “Poor,” and 11.5% are classified as structurally deficient — the federal designation for spans whose deck, superstructure, or substructure has been rated 4 or below on the 0–9 NBI scale. Structurally deficient does not mean unsafe to cross; it means the bridge is on the priority list for repair or replacement.

Inspections in CA are conducted by certified engineers from the state Department of Transportation on a 24-month cycle, and results are reported back to the FHWA each spring. The list below shows every NBI-tracked bridge in the county, sorted by inventory load rating. Use the “Sort by” controls to surface the lowest-rated spans first, and click any row for full inspection history, traffic counts, and condition trends.

Source: FHWA National Bridge Inventory. See methodology for full definitions.

96

Total Bridges

47.9%

Good

11.5%

Poor

11.5%

Structurally Deficient

Condition Distribution

Good

47.9% (46)

Fair

36.5% (35)

Poor

11.5% (11)

SD

11.5% (11)

All Bridges (96)

Sort:

U.S. HIGHWAY 101

Over: SR 169 & HOPPOW CREEK

01-DN-101-R4.64, Del Norte, CA

Built 1965 ADT: 1,900

S199-S101 CONNECTR

Over: U.S. 101 (@ PM R30.81)

01-DN-199-T0.51L, Del Norte, CA

Built 1971 ADT: 29,500

RAILROAD AVE

Over: U.S. HIGHWAY 101

01-DN-101-R28.32, Del Norte, CA

Built 1971 ADT: 29,500

WASHINGTON BLVD

Over: U.S. HIGHWAY 101

01-DN-101-R27.87, Del Norte, CA

Built 1971 ADT: 29,500

HAMILTON ROAD

Over: EAST FORK MILL CREEK

2.8 MILES EAST OF US 101, Del Norte, CA

Built 1950 ADT: 10

NO DATA ENTERED

Over: NO DATA ENTERED

S8 T15N R3E, Del Norte, CA

Built 1974 ADT: 50

NO DATA ENTERED

Over: NO DATA ENTERED

S27 T17N R3E, Del Norte, CA

Built 1981 ADT: 50

NO DATA ENTERED

Over: NO DATA ENTERED

S11 T18N R3E, Del Norte, CA

Built 1970 ADT: 50

NO DATA ENTERED

Over: COON CREEK

NO DATA ENTERED, Del Norte, CA

Built 1985 ADT: 50

NO DATA ENTERED

Over: NOTICE CREEK

NO DATA ENTERED, Del Norte, CA

Built 1958 ADT: 50

NO DATA ENTERED

Over: BLUFF CREEK

S22 T12N R4E, Del Norte, CA

Built 1976 ADT: 50

NO DATA ENTERED

Over: AIKENS

S25 T10N R4E, Del Norte, CA

Built 1957 ADT: 50

U.S. HIGHWAY 101

Over: SMITH RIV, SOUTH BANK RD

01-DN-101-36.06, Del Norte, CA

Built 1940 Load: 14.3 t ADT: 6,500

REQUA ROAD

Over: HUNTER CREEK

0.1 MI WEST OF RT101, Del Norte, CA

Built 1949 Load: 14.9 t ADT: 1,110

MILL CREEK CMPGRND

Over: MILL CREEK

DEL NORTE STATE PARK, Del Norte, CA

Built 1989 Load: 15.9 t ADT: 200

OCEAN VIEW DRIVE

Over: GILBERT CREEK

0.8 MI S OF RT 101, Del Norte, CA

Built 1947 Load: 17.2 t ADT: 670

OLD GASQUET TOLL

Over: WEST FORK PATRICKS CREEK

3.5 MI FROM RTE 199, Del Norte, CA

Built 1960 Load: 17.5 t ADT: 30

BREEN MEMORIAL RD

Over: MILL CREEK

JEDEDIAH SMITH STATE PARK, Del Norte, CA

Built 1949 Load: 22.7 t ADT: 100

U.S. HIGHWAY 101

Over: MINOT CREEK

01-DN-101-8.14, Del Norte, CA

Built 1957 Load: 24.3 t ADT: 4,600

REQUA ROAD

Over: SALT CREEK

0.4 MI WEST OF RTE 101, Del Norte, CA

Built 1958 Load: 24.3 t ADT: 1,110

GASQUET FLAT ROAD

Over: MIDDLE FORK SMITH RIVER

0.1 MILE N/O RTE 199, Del Norte, CA

Built 1960 Load: 25.3 t ADT: 400

U.S. HIGHWAY 101

Over: KLAMATH BCH RD,WAUKELL C

01-DN-101-R3.77, Del Norte, CA

Built 1965 Load: 28.8 t ADT: 3,600

U.S. HIGHWAY 199

Over: MIDDLE FORK SMITH RIVER

01-DN-199-R19.22, Del Norte, CA

Built 1965 Load: 29.2 t ADT: 3,100

W169-N101 CONNECTR

Over: HOPPOW CREEK

01-DN-169-R0.03, Del Norte, CA

Built 1965 Load: 30.1 t ADT: 430

COUNTY ROAD 316

Over: SHELLY CREEK

9.3 MI N OF US HWY 199, Del Norte, CA

Built 1975 Load: 31.1 t ADT: 50

U.S. HIGHWAY 101

Over: NEWTON B DRURY SCNC PKWY

01-DN-101-M0.15, Del Norte, CA

Built 1990 Load: 32.4 t ADT: 3,100

US HIGHWAY 199 NB

Over: HILLSIDE ABOVE RIVER

01-DN-199-7.41, Del Norte, CA

Built 1994 Load: 32.4 t ADT: 4,300

US HIGHWAY 101 SB

Over: HILLSIDE

01-DN-101-21.40, Del Norte, CA

Built 2005 Load: 32.4 t ADT: 5,000

US HIGHWAY 199 NB

Over: HILLSIDE ABOVE RIVER

01-DN-199-8.20, Del Norte, CA

Built 2017 Load: 32.4 t ADT: 4,300

SOUTH FORK ROAD

Over: SOUTH FORK SMITH RIVER

6.1 MILE SE OF RTE 199, Del Norte, CA

Built 1981 Load: 32.4 t ADT: 334

OREGON MOUNTAIN RD

Over: ELK CREEK

0.1 MILE NE/O RTE 199, Del Norte, CA

Built 1925 Load: 33.4 t ADT: 40

U.S. HIGHWAY 101

Over: HIGH PRAIRIE CREEK

01-DN-101-9.39, Del Norte, CA

Built 1957 Load: 34.0 t ADT: 4,600

WALKER ROAD

Over: CLARKS CREEK

0.2 MI NORTH OF RTE 199, Del Norte, CA

Built 2002 Load: 34.7 t ADT: 25

KLAMATH MILL ROAD

Over: HOPPOW CREEK

500' E OF RT 101/169 SEP, Del Norte, CA

Built 1965 Load: 36.3 t ADT: 1,395

SOUTH FORK ROAD

Over: MIDDLE FORK SMITH RIVER

0.05 MI SE JCT SR199, Del Norte, CA

Built 1956 Load: 36.3 t ADT: 350

S101-CHAPMAN ST RP

Over: HOPPOW CREEK

01-DN-101-R4.76, Del Norte, CA

Built 1965 Load: 36.9 t ADT: 320

US HIGHWAY 199 NB

Over: HILLSIDE ABOVE RIVER

01-DN-199-R17.46, Del Norte, CA

Built 1976 Load: 36.9 t ADT: 3,100

LAKE EARL DRIVE

Over: JORDAN CREEK

3.7 MI N OF RTE 101, Del Norte, CA

Built 1954 Load: 37.9 t ADT: 4,150

U.S. HIGHWAY 101

Over: KLAMATH RIVER

01-DN-101-R4.04, Del Norte, CA

Built 1965 Load: 43.4 t ADT: 3,600

U.S. HIGHWAY 101

Over: PANTHER CREEK

01-DN-101-8.34, Del Norte, CA

Built 2021 ADT: 4,900

NO DATA ENTERED

Over: NO DATA ENTERED

S28 T18N R4E, Del Norte, CA

Built 1972 ADT: 50

NO DATA ENTERED

Over: NO DATA ENTERED

S27 T18N R4E, Del Norte, CA

Built 1973 ADT: 50

NO DATA ENTERED

Over: MIDDLE FORK SMITH RIVER

S11 T17N R3E, Del Norte, CA

Built 1954 ADT: 50

NO DATA ENTERED

Over: NO DATA ENTERED

S22 T18N R4E, Del Norte, CA

Built 1967 ADT: 50

NO DATA ENTERED

Over: NO DATA ENTERED

S23 T15N R2E, Del Norte, CA

Built 1963 Load: 12.6 t ADT: 50

DOUGLAS PARK ROAD

Over: SHEEP PEN CREEK

0.74 MI S/O SOUTH FORK RD, Del Norte, CA

Built 1975 Load: 21.1 t ADT: 140

U.S. HIGHWAY 199

Over: MIDDLE FORK SMITH RIVER

01-DN-199-24.08, Del Norte, CA

Built 1925 Load: 23.7 t ADT: 3,750

HAMILTON ROAD

Over: POWDERHOUSE CREEK

4 MILES EAST OF US 101, Del Norte, CA

Built 2019 Load: 26.9 t ADT: 10

U.S. HIGHWAY 199

Over: HARDSCRABBLE CREEK

01-DN-199-11.01, Del Norte, CA

Built 2008 Load: 27.5 t ADT: 3,750

U.S. HIGHWAY 101

Over: GILBERT CREEK

01-DN-101-45.30, Del Norte, CA

Built 1953 Load: 29.5 t ADT: 7,300

Read our methodology — how this data is sourced, computed, and verified.

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Data sourced from official U.S. government datasets. See our methodology for details. Retrieved and formatted by PlainBridges Editorial

Reviewed byPlainbridges Editorial, Plain Bridges Editorial Team · June 6, 2026