US Bridges

Jacksonville Road over Don Pedro Reservoir

Fair

Tuolumne County, California · 0.6 MI N/O SR 120 · Structure no. 32C0057

Built
1970
55 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
1,441 ft
7 main spans
Daily traffic
1,491
2015 count
Owner
County
County Highway Agency

About this bridge

Jacksonville Road over Don Pedro Reservoir is a steel continuous stringer/multi-beam or girder carrying Jacksonville Road over Don Pedro Reservoir in Tuolumne County, California. It was built in 1970, so it is 55 years old, older than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 1,491 vehicles a day, roughly 1% of them trucks, projected to reach 2,208 by 2041. The structure is 1,441 ft (439.3 m) long and 34 ft wide. If it were closed, the detour would be 24.2 mi (39 km).

Location

Open in Google Maps
CarriesJacksonville Road
CrossesDon Pedro Reservoir
Location0.6 MI N/O SR 120
RouteCounty Highway 0
CountyTuolumne County
StateCalifornia
Coordinates37.83563, -120.3441
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44.3 US tons
Inventory rating19.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans7 (+2 approach)
Design loadHS 20
Structure length1,441 ft (439.3 m)
Longest span203 ft (61.9 m)
Deck width34 ft (10.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,491 (2015)
Projected traffic2,208 by 2041
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed24.2 mi (39 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Jacksonville Road over Don Pedro Reservoir built?

It was built in 1970, making it 55 years old in 2025.

What condition is Jacksonville Road over Don Pedro Reservoir in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in July 2023.

How much traffic does Jacksonville Road over Don Pedro Reservoir carry?

About 1,491 vehicles per day (2015 count), of which roughly 1% are trucks.

How long is Jacksonville Road over Don Pedro Reservoir?

The structure is 1,441 ft (439.3 m) long with a longest span of 203 ft (61.9 m) and a deck 34 ft wide.

Who owns Jacksonville Road over Don Pedro Reservoir?

It is owned by the County Highway Agency.