Mariposa County, CA

109 public highway bridges

Mariposa County Bridge Snapshot

Mariposa County, California contains 109 public highway bridges in the FHWA National Bridge Inventory. Roughly 21.1% are rated “Good,” 67.9% “Fair,” 11% “Poor,” and 11% 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.

109
Total Bridges
21.1%
Good
11%
Poor
11%
Structurally Deficient

Condition Distribution

Good
21.1% (23)
Fair
67.9% (74)
Poor
11% (12)
SD
11% (12)

All Bridges (109)

NO DATA ENTERED

Fair

Over: NO DATA ENTERED

NO DATA ENTERED, Mariposa, CA

Built 1969 ADT: 50

DOGTOWN ROAD

Fair

Over: MAXWELL CREEK

1.6 MI E GREELY HILL R, Mariposa, CA

Built 1958 Load: 10.7 t ADT: 120

18058: MERCED RIVE

Fair

Over: Merced River

8 mi N of Mariposa CA, Mariposa, CA

Built 1927 Load: 13.6 t ADT: 100

BULL CREEK ROAD

Fair

Over: BULL CREEK

4.5 MI SE OLD YOSEMITE RD, Mariposa, CA

Built 1950 Load: 14.9 t ADT: 100

STATE ROUTE 49

Fair

Over: DELONG CREEK

10-MPA-049-6.18, Mariposa, CA

Built 1948 Load: 16.2 t ADT: 3,725

OLD HIGHWAY ROAD

Fair

Over: AGUA FRIA CREEK

4.7 MI SW OF SR 49, Mariposa, CA

Built 1919 Load: 16.2 t ADT: 180

WHITE ROCK ROAD

Fair

Over: MARIPOSA CREEK

1.6 MI S/O OLD HWY, Mariposa, CA

Built 1968 Load: 16.2 t ADT: 20

TRIANGLE ROAD

Fair

Over: SUMMIT CREEK

STATE ROUTE 140, Mariposa, CA

Built 1935 Load: 16.2 t ADT: 960

TRAIL

Fair

Over: TENAYA CREEK

Approximately 0.4 miles n, Mariposa, CA

Built 1928 Load: 16.3 t ADT: 1

HORNITOS ROAD

Fair

Over: BEAR CREEK

3.6 MI N OF SR 140, Mariposa, CA

Built 1948 Load: 16.8 t ADT: 350

SCHOOL HOUSE ROAD

Fair

Over: OWENS CREEK

0.9 MI SE OF SR 140, Mariposa, CA

Built 1936 Load: 16.8 t ADT: 380

OLD HIGHWAY

Fair

Over: OWENS CREEK

0.3 MI EAST OF SR 140, Mariposa, CA

Built 1920 Load: 16.8 t ADT: 100

INCLINE ROAD

Fair

Over: MOSS CANYON

0.25 MI WEST OF SR 140, Mariposa, CA

Built 1965 Load: 17.2 t ADT: 150

VALLEY LOOP ROAD

Fair

Over: YOSEMITE CREEK

In Yosemite Valley, on tw, Mariposa, CA

Built 1922 Load: 17.2 t ADT: 3,416

BUCK MEADOWS ROAD

Fair

Over: MOORE CREEK

1.2 MI N/O GREELEY HILL R, Mariposa, CA

Built 1937 Load: 18.5 t ADT: 610

DOGTOWN ROAD

Fair

Over: MAXWELL CREEK

0.2 MI E/O GREELEY HILL R, Mariposa, CA

Built 1944 Load: 18.8 t ADT: 120

HAPPY ISLES LOOP

Fair

Over: MERCED RIVER

Approximately 500' downst, Mariposa, CA

Built 1929 Load: 19.0 t ADT: 50

EL PORTAL ROAD

Fair

Over: EAST FORK CASCADE CREEK

5.1 miles east from El Po, Mariposa, CA

Built 1985 Load: 19.0 t ADT: 2,080

STATE ROUTE 49

Fair

Over: MAXWELL CREEK

10-MPA-049-44.62, Mariposa, CA

Built 1963 Load: 20.4 t ADT: 615

BIG OAK FLAT ROAD

Fair

Over: TAMARACK CREEK

7.0 miles east from El Po, Mariposa, CA

Built 1939 Load: 20.9 t ADT: 2,530

STATE ROUTE 49

Fair

Over: MARIPOSA CREEK

10-MPA-049-19.61, Mariposa, CA

Built 1942 Load: 21.4 t ADT: 6,600

STATE ROUTE 49

Fair

Over: MERCED RIVER

10-MPA-049-R34.35, Mariposa, CA

Built 1966 Load: 21.4 t ADT: 615

BIG OAK FLAT ROAD

Fair

Over: CASCADE CREEK

7.0 miles east from El Po, Mariposa, CA

Built 1939 Load: 21.8 t ADT: 2,530

STATE ROUTE 140

Fair

Over: MILES CREEK

10-MPA-140-0.79, Mariposa, CA

Built 1916 Load: 22.0 t ADT: 4,650

GLACIER POINT ROAD

Fair

Over: BRIDALVEIL CREEK

8.8 miles east from El Po, Mariposa, CA

Built 1933 Load: 22.7 t ADT: 1,517

BIG OAK FLAT ROAD

Fair

Over: WILDCAT CREEK

7.0 miles east from El Po, Mariposa, CA

Built 1939 Load: 23.6 t ADT: 2,530

OLD HWY

Fair

Over: MARIPOSA CREEK

10-MPA-049-17.25, Mariposa, CA

Built 1920 Load: 24.3 t ADT: 840

HORNITOS ROAD

Fair

Over: TURNER CREEK

0.1 MI E INDIAN GULCH RD, Mariposa, CA

Built 1956 Load: 24.3 t ADT: 150

HORNITOS ROAD

Fair

Over: ELDORADO CREEK

0.4 MI SE BEAR VALLEY RD, Mariposa, CA

Built 1956 Load: 24.3 t ADT: 130

HORNITOS ROAD

Fair

Over: BURNS CREEK

0.05 MI W BEAR VALLEY RD, Mariposa, CA

Built 1956 Load: 24.3 t ADT: 560

GREELEY HILL ROAD

Fair

Over: BEAN CREEK

.3 MI NE/O HOLTZEL RD, Mariposa, CA

Built 1956 Load: 24.3 t ADT: 1,120

GREELEY HILL ROAD

Fair

Over: SMITH CREEK

1.7 MI NE/O HOLTZEL RD, Mariposa, CA

Built 1956 Load: 24.3 t ADT: 610

BEAR VALLEY ROAD

Fair

Over: NO NAME CREEK

4.4 MI NE HORNITOS RD, Mariposa, CA

Built 1961 Load: 24.3 t ADT: 190

BEAR VALLEY ROAD

Fair

Over: BURNS CREEK

5.3 MI NE HORNITOS RD, Mariposa, CA

Built 1961 Load: 24.3 t ADT: 190

BUCKEYE ROAD

Fair

Over: BUCKEYE CREEK

0.6 MI SE OLD HIGHWAY RD, Mariposa, CA

Built 1960 Load: 24.3 t ADT: 200

STATE ROUTE 140

Fair

Over: MILES CREEK

10-MPA-140-3.81, Mariposa, CA

Built 1928 Load: 24.6 t ADT: 4,650

FORESTA ROAD

Fair

Over: CRANE CREEK

3.6 MI W NEW BIG OAT FL R, Mariposa, CA

Built 1959 Load: 24.9 t ADT: 10

WHITE ROCK ROAD

Fair

Over: DEADMAN CREEK

0.05 MI E WESTFALL RD, Mariposa, CA

Built 1960 Load: 25.3 t ADT: 20

VALLEY LOOP ROAD

Fair

Over: MERCED RIVER

14.2 miles east from El P, Mariposa, CA

Built 1933 Load: 26.3 t ADT: 3,416

EL CAPITAN CROSSOV

Fair

Over: MERCED RIVER

10.3 miles east from El P, Mariposa, CA

Built 1933 Load: 27.2 t ADT: 3,416

OLD YOSEMITE ROAD

Fair

Over: NORTH FORK MERCED RIVER

1.3 MI EAST JORDAN CRK RD, Mariposa, CA

Built 1950 Load: 27.5 t ADT: 190

STATE ROUTE 140

Fair

Over: MILES CREEK

10-MPA-140-3.46, Mariposa, CA

Built 1916 Load: 28.5 t ADT: 4,650

STATE ROUTE 41

Fair

Over: BIG CREEK

06-MPA-041-3.48, Mariposa, CA

Built 1931 Load: 28.5 t ADT: 2,300

BEN HUR ROAD

Fair

Over: CHAPMAN CREEK

3.5 MI N PRESTON ROAD, Mariposa, CA

Built 1967 Load: 28.5 t ADT: 90

SLAUGHTERHOUSE RD

Fair

Over: STOCKTON CREEK

0.2 MI EAST OF SR 140, Mariposa, CA

Built 1974 Load: 28.5 t ADT: 8

STATE ROUTE 140

Fair

Over: MERCED RIVER

10-MPA-140-42.50, Mariposa, CA

Built 2008 Load: 28.8 t ADT: 1,400

STATE ROUTE 140

Fair

Over: MILES CREEK

10-MPA-140-2.89, Mariposa, CA

Built 1928 Load: 30.5 t ADT: 4,650

SENTINEL BRIDGE RO

Fair

Over: MERCED RIVER

13.2 miles east from El P, Mariposa, CA

Built 1994 Load: 30.8 t ADT: 3,416

CURRY STABLES ROAD

Fair

Over: MERCED RIVER

14.2 miles E from El Port, Mariposa, CA

Built 1928 Load: 30.8 t ADT: 100

TIOGA ROAD

Fair

Over: YOSEMITE CREEK

7.0 miles east of El Port, Mariposa, CA

Built 1960 Load: 30.8 t ADT: 2,041

Related

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