US Bridges

Summit Creek Road over Carr Creek

Poor

Trinity County, California · 0.1 MI S of S.R. 3 · Structure no. 05C0105

Built
1987
38 years old
Condition
Poor
inspected May 2024
Type
Slab
Prestressed Concrete
Length
60 ft
1 main span
Daily traffic
300
2013 count
Owner
County
County Highway Agency

About this bridge

Summit Creek Road over Carr Creek is a prestressed concrete slab carrying Summit Creek Road over Carr Creek in Trinity County, California. It was built in 1987, so it is 38 years old, younger than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 300 vehicles a day, roughly 25% of them trucks, projected to reach 373 by 2042. The structure is 60 ft (18.3 m) long and 32 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesSummit Creek Road
CrossesCarr Creek
Location0.1 MI S of S.R. 3
RouteCounty Highway 0
CountyTrinity County
StateCalifornia
Coordinates40.57605, -123.08874
Functional classRural Major Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to 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

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length60 ft (18.3 m)
Longest span55 ft (16.7 m)
Deck width32 ft (9.8 m)
Roadway width31 ft (9.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic300 (2013)
Projected traffic373 by 2042
Trucks25%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$299,000 (2018 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Summit Creek Road over Carr Creek built?

It was built in 1987, making it 38 years old in 2025.

What condition is Summit Creek Road over Carr Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in May 2024.

How much traffic does Summit Creek Road over Carr Creek carry?

About 300 vehicles per day (2013 count), of which roughly 25% are trucks.

How long is Summit Creek Road over Carr Creek?

The structure is 60 ft (18.3 m) long with a longest span of 55 ft (16.7 m) and a deck 32 ft wide.

Who owns Summit Creek Road over Carr Creek?

It is owned by the County Highway Agency.