US Bridges

Mountain House RD over California Aqueduct

Fair

San Joaquin County, California · 0.1 MI S. Schulte RD · Structure no. 29C0083L

Built
1993
32 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
228 ft
3 main spans
Daily traffic
4,403
2009 count
Owner
County
County Highway Agency

About this bridge

Mountain House RD over California Aqueduct is a prestressed concrete continuous stringer/multi-beam or girder carrying Mountain House RD over California Aqueduct in San Joaquin County, California. It was built in 1993, so it is 32 years old, younger 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 5 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 4,403 vehicles a day, roughly 50% of them trucks, projected to reach 12,784 by 2046. The structure is 228 ft (69.5 m) long and 33 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesMountain House RD
CrossesCalifornia Aqueduct
Location0.1 MI S. Schulte RD
RouteCounty Highway 0
CountySan Joaquin County
StateCalifornia
Coordinates37.72074, -121.5337
Functional classRural Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length228 ft (69.5 m)
Longest span160 ft (48.8 m)
Deck width33 ft (10.2 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,403 (2009)
Projected traffic12,784 by 2046
Trucks50%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 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 Mountain House RD over California Aqueduct built?

It was built in 1993, making it 32 years old in 2025.

What condition is Mountain House RD over California Aqueduct 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 June 2024.

How much traffic does Mountain House RD over California Aqueduct carry?

About 4,403 vehicles per day (2009 count), of which roughly 50% are trucks.

How long is Mountain House RD over California Aqueduct?

The structure is 228 ft (69.5 m) long with a longest span of 160 ft (48.8 m) and a deck 33 ft wide.

Who owns Mountain House RD over California Aqueduct?

It is owned by the County Highway Agency.