US Bridges

28 Mile Road over Woodward Reservoir

Good

Stanislaus County, California · 1.4 MI N Dorsey RD · Structure no. 38C0020

Built
1989
36 years old
Condition
Good
inspected September 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
122 ft
1 main span
Daily traffic
76
2019 count
Owner
County
County Highway Agency

About this bridge

28 Mile Road over Woodward Reservoir is a prestressed concrete box beam or girders - multiple carrying 28 Mile Road over Woodward Reservoir in Stanislaus County, California. It was built in 1989, so it is 36 years old, younger than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 76 vehicles a day, roughly 26% of them trucks, projected to reach 124 by 2043. The structure is 122 ft (37.2 m) long and 29 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Carries28 Mile Road
CrossesWoodward Reservoir
Location1.4 MI N Dorsey RD
RouteCounty Highway 0
Coordinates37.84805, -120.83125
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length122 ft (37.2 m)
Longest span120 ft (36.6 m)
Deck width29 ft (8.9 m)
Roadway width29 ft (8.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic76 (2019)
Projected traffic124 by 2043
Trucks26%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 28 Mile Road over Woodward Reservoir built?

It was built in 1989, making it 36 years old in 2025.

What condition is 28 Mile Road over Woodward Reservoir in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2023.

How much traffic does 28 Mile Road over Woodward Reservoir carry?

About 76 vehicles per day (2019 count), of which roughly 26% are trucks.

How long is 28 Mile Road over Woodward Reservoir?

The structure is 122 ft (37.2 m) long with a longest span of 120 ft (36.6 m) and a deck 29 ft wide.

Who owns 28 Mile Road over Woodward Reservoir?

It is owned by the County Highway Agency.