US Bridges

Milton Road over Rock Creek

Fair

Stanislaus County, California · 3.4 MI N/O SR 4 · Structure no. 38C0198

Built
1918
107 years old, rebuilt 1968
Condition
Fair
inspected September 2023
Type
Slab
Concrete Continuous
Length
25 ft
2 main spans
Daily traffic
716
2017 count
Owner
County
County Highway Agency

About this bridge

Milton Road over Rock Creek is a concrete continuous slab carrying Milton Road over Rock Creek in Stanislaus County, California. It was built in 1918 and reconstructed in 1968, so it is 107 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 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 716 vehicles a day, roughly 25% of them trucks, projected to reach 943 by 2045. The structure is 25 ft (7.6 m) long and 41 ft wide. If it were closed, the detour would be 34.2 mi (55 km).

Location

Open in Google Maps
CarriesMilton Road
CrossesRock Creek
Location3.4 MI N/O SR 4
RouteCounty Highway 0
CountyStanislaus County
StateCalifornia
Coordinates37.99163, -120.84716
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry8: Equal to present desirable criteria
Waterway adequacy3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating29.7 US tons
Inventory rating17.9 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length25 ft (7.6 m)
Longest span11 ft (3.4 m)
Deck width41 ft (12.4 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic716 (2017)
Projected traffic943 by 2045
Trucks25%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed34.2 mi (55 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 Milton Road over Rock Creek built?

It was built in 1918, making it 107 years old in 2025. It was reconstructed in 1968.

What condition is Milton Road over Rock Creek 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 September 2023.

How much traffic does Milton Road over Rock Creek carry?

About 716 vehicles per day (2017 count), of which roughly 25% are trucks.

How long is Milton Road over Rock Creek?

The structure is 25 ft (7.6 m) long with a longest span of 11 ft (3.4 m) and a deck 41 ft wide.

Who owns Milton Road over Rock Creek?

It is owned by the County Highway Agency.