US Bridges

8 Av S over Muck Creek

FairPosted for load

Pierce County, Washington · 2.8 S JCT SR 507 · Structure no. 082768000000000

Built
1947
78 years old
Condition
Fair
inspected August 2024
Type
Slab
Concrete
Length
32 ft
1 main span
Daily traffic
4,450
2024 count
Owner
County
County Highway Agency

About this bridge

8 Av S over Muck Creek is a concrete slab carrying 8 Av S over Muck Creek in Pierce County, Washington. It was built in 1947, so it is 78 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. Its operating status is: posted for load restriction.

It carries about 4,450 vehicles a day, roughly 5% of them trucks, projected to reach 7,350 by 2040. The structure is 32 ft (9.8 m) long and 30 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Carries8 Av S
CrossesMuck Creek
Location2.8 S JCT SR 507
RouteCounty Highway 94110
Coordinates47.04278, -122.44333
Functional classRural Minor Arterial

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.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating31 US tons
Inventory rating18 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length32 ft (9.8 m)
Longest span30 ft (9.1 m)
Deck width30 ft (9.1 m)
Roadway width29 ft (8.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,450 (2024)
Projected traffic7,350 by 2040
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.3 million (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 8 Av S over Muck Creek built?

It was built in 1947, making it 78 years old in 2025.

What condition is 8 Av S over Muck 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 August 2024.

How much traffic does 8 Av S over Muck Creek carry?

About 4,450 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is 8 Av S over Muck Creek?

The structure is 32 ft (9.8 m) long with a longest span of 30 ft (9.1 m) and a deck 30 ft wide.

Who owns 8 Av S over Muck Creek?

It is owned by the County Highway Agency.