US Bridges

Southcenter Blvd over Green River

Fair

King County, Washington · 0.12 MI E Intrurban Ave S · Structure no. 0014269D0000000

Built
1994
31 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
245 ft
3 main spans
Daily traffic
10,616
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

Southcenter Blvd over Green River is a prestressed concrete continuous stringer/multi-beam or girder carrying Southcenter Blvd over Green River in King County, Washington. It was built in 1994, so it is 31 years old, younger 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 10,616 vehicles a day, roughly 4% of them trucks, projected to reach 29,000 by 2040. The structure is 245 ft (74.7 m) long and 72 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesSouthcenter Blvd
CrossesGreen River
Location0.12 MI E Intrurban Ave S
RouteCity Street 1147
Coordinates47.46364, -122.24878
Functional classUrban 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum criteria
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 rating79.3 US tons
Inventory rating47.5 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length245 ft (74.7 m)
Longest span115 ft (35.1 m)
Deck width72 ft (21.9 m)
Roadway width62 ft (18.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,616 (2020)
Projected traffic29,000 by 2040
Trucks4%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$7.4 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Southcenter Blvd over Green River built?

It was built in 1994, making it 31 years old in 2025.

What condition is Southcenter Blvd over Green River 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 Southcenter Blvd over Green River carry?

About 10,616 vehicles per day (2020 count), of which roughly 4% are trucks.

How long is Southcenter Blvd over Green River?

The structure is 245 ft (74.7 m) long with a longest span of 115 ft (35.1 m) and a deck 72 ft wide.

Who owns Southcenter Blvd over Green River?

It is owned by the City or Municipal Highway Agency.