US Bridges

State Route 88 over Rocky Creek

Good

Amador County, California · 10-AMA-088-16.66 · Structure no. 26 0002

Built
1942
83 years old, rebuilt 1954
Condition
Good
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
30 ft
1 main span
Daily traffic
22,300
2009 count
Owner
State
State Highway Agency

About this bridge

State Route 88 over Rocky Creek is a steel stringer/multi-beam or girder carrying State Route 88 over Rocky Creek in Amador County, California. It was built in 1942 and reconstructed in 1954, so it is 83 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 22,300 vehicles a day, roughly 7% of them trucks, projected to reach 24,770 by 2041. The structure is 30 ft (9.1 m) long and 35 ft wide. If it were closed, the detour would be 9.3 mi (15 km).

Location

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CarriesState Route 88
CrossesRocky Creek
Location10-AMA-088-16.66
RouteState Highway 88
CountyAmador County
StateCalifornia
Coordinates38.36249, -120.73787
Functional classRural Principal Arterial - Other

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 protection7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating37.1 US tons
Inventory rating22.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length30 ft (9.1 m)
Longest span29 ft (8.7 m)
Deck width35 ft (10.6 m)
Roadway width32 ft (9.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic22,300 (2009)
Projected traffic24,770 by 2041
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.3 mi (15 km)
TollOn a free road
National Highway SystemYes

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—
NavigationNo navigation control on waterway

Frequently asked questions

When was State Route 88 over Rocky Creek built?

It was built in 1942, making it 83 years old in 2025. It was reconstructed in 1954.

What condition is State Route 88 over Rocky Creek 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 April 2023.

How much traffic does State Route 88 over Rocky Creek carry?

About 22,300 vehicles per day (2009 count), of which roughly 7% are trucks.

How long is State Route 88 over Rocky Creek?

The structure is 30 ft (9.1 m) long with a longest span of 29 ft (8.7 m) and a deck 35 ft wide.

Who owns State Route 88 over Rocky Creek?

It is owned by the State Highway Agency.