US Bridges

Little Rock RD over Beaver Creek

Good

Thurston County, Washington · 6.9 JCT SR 12 · Structure no. 0004057B0000000

Built
1951
74 years old
Condition
Good
inspected June 2024
Type
Slab
Concrete Continuous
Length
137 ft
6 main spans
Daily traffic
3,577
2020 count
Owner
County
County Highway Agency

About this bridge

Little Rock RD over Beaver Creek is a concrete continuous slab carrying Little Rock RD over Beaver Creek in Thurston County, Washington. It was built in 1951, so it is 74 years old, older than the Washington average of 49.8 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 3,577 vehicles a day, roughly 15% of them trucks, projected to reach 5,530 by 2042. The structure is 137 ft (41.8 m) long and 31 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

CarriesLittle Rock RD
CrossesBeaver Creek
Location6.9 JCT SR 12
RouteCounty Highway 12945
Coordinates46.89755, -123.01981
Functional classRural Major 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.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
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 rating89.9 US tons
Inventory rating54 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length137 ft (41.8 m)
Longest span24 ft (7.3 m)
Deck width31 ft (9.4 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,577 (2020)
Projected traffic5,530 by 2042
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$5.3 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Little Rock RD over Beaver Creek built?

It was built in 1951, making it 74 years old in 2025.

What condition is Little Rock RD over Beaver 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 June 2024.

How much traffic does Little Rock RD over Beaver Creek carry?

About 3,577 vehicles per day (2020 count), of which roughly 15% are trucks.

How long is Little Rock RD over Beaver Creek?

The structure is 137 ft (41.8 m) long with a longest span of 24 ft (7.3 m) and a deck 31 ft wide.

Who owns Little Rock RD over Beaver Creek?

It is owned by the County Highway Agency.