US Bridges

Benston Drive E over SR 512

Good

Pierce County, Washington · 2.8 E JCT SR 161 · Structure no. 0009075E0000000

Built
1972
53 years old
Condition
Good
inspected June 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
258 ft
4 main spans
Daily traffic
2,250
2020 count
Owner
State
State Highway Agency

About this bridge

Benston Drive E over SR 512 is a prestressed concrete continuous stringer/multi-beam or girder carrying Benston Drive E over SR 512 in Pierce County, Washington. It was built in 1972, so it is 53 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 2,250 vehicles a day, roughly 8% of them trucks, projected to reach 3,615 by 2040. The structure is 258 ft (78.6 m) long and 37 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesBenston Drive E
CrossesSR 512
Location2.8 E JCT SR 161
RouteCounty Highway 0
Coordinates47.19658, -122.28172
Functional classUrban 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.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating30.3 US tons
Inventory rating23.6 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length258 ft (78.6 m)
Longest span85 ft (25.9 m)
Deck width37 ft (11.4 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,250 (2020)
Projected traffic3,615 by 2040
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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$3.9 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Benston Drive E over SR 512 built?

It was built in 1972, making it 53 years old in 2025.

What condition is Benston Drive E over SR 512 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 Benston Drive E over SR 512 carry?

About 2,250 vehicles per day (2020 count), of which roughly 8% are trucks.

How long is Benston Drive E over SR 512?

The structure is 258 ft (78.6 m) long with a longest span of 85 ft (25.9 m) and a deck 37 ft wide.

Who owns Benston Drive E over SR 512?

It is owned by the State Highway Agency.