US Bridges

Littlerock Rd. over Creek

Fair

Thurston County, Washington · 3.9 N SR 12 · Structure no. 0004057A0000000

Built
1951
74 years old
Condition
Fair
inspected June 2024
Type
Slab
Concrete Continuous
Length
60 ft
3 main spans
Daily traffic
3,164
2020 count
Owner
County
County Highway Agency

About this bridge

Littlerock Rd. over Creek is a concrete continuous slab carrying Littlerock Rd. over 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 fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 3,164 vehicles a day, roughly 15% of them trucks, projected to reach 4,887 by 2042. The structure is 60 ft (18.3 m) long and 31 ft wide. If it were closed, the detour would be 18 mi (29 km).

Location

Open in Google Maps
CarriesLittlerock Rd.
CrossesCreek
Location3.9 N SR 12
RouteCounty Highway 12945
CountyThurston County
StateWashington
Coordinates46.85656, -123.03709
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating81 US tons
Inventory rating48 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length60 ft (18.3 m)
Longest span22 ft (6.7 m)
Deck width31 ft (9.4 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,164 (2020)
Projected traffic4,887 by 2042
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed18 mi (29 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$2.5 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Littlerock Rd. over Creek built?

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

What condition is Littlerock Rd. over Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in June 2024.

How much traffic does Littlerock Rd. over Creek carry?

About 3,164 vehicles per day (2020 count), of which roughly 15% are trucks.

How long is Littlerock Rd. over Creek?

The structure is 60 ft (18.3 m) long with a longest span of 22 ft (6.7 m) and a deck 31 ft wide.

Who owns Littlerock Rd. over Creek?

It is owned by the County Highway Agency.