US Bridges

Hammett RD over UP RR

Good

Stanislaus County, California · 10-STA-099-R24.30 · Structure no. 38 0158Y

Built
1970
55 years old
Condition
Good
inspected March 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
139 ft
3 main spans
Daily traffic
2,000
2011 count
Owner
State
State Highway Agency

About this bridge

Hammett RD over UP RR is a prestressed concrete continuous box beam or girders - multiple carrying Hammett RD over UP RR in Stanislaus 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 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 2,000 vehicles a day, roughly 2% of them trucks, projected to reach 3,778 by 2045. The structure is 139 ft (42.4 m) long and 47 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

CarriesHammett RD
CrossesUP RR
Location10-STA-099-R24.30
RouteState Highway 99
Coordinates37.72487, -121.10434
Functional classUrban Collector

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.
Last inspectionMarch 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110 US tons
Inventory rating71.4 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length139 ft (42.4 m)
Longest span55 ft (16.8 m)
Deck width47 ft (14.3 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,000 (2011)
Projected traffic3,778 by 2045
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesRailroad
Detour if closed2.5 mi (4 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Hammett RD over UP RR built?

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

What condition is Hammett RD over UP RR 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 March 2023.

How much traffic does Hammett RD over UP RR carry?

About 2,000 vehicles per day (2011 count), of which roughly 2% are trucks.

How long is Hammett RD over UP RR?

The structure is 139 ft (42.4 m) long with a longest span of 55 ft (16.8 m) and a deck 47 ft wide.

Who owns Hammett RD over UP RR?

It is owned by the State Highway Agency.