US Bridges

Independence RD over Stream

Good

Thurston County, Washington · 0.55 N of Grays County Li · Structure no. 088275000000000

Built
2010
15 years old
Condition
Good
inspected March 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
106 ft
1 main span
Daily traffic
888
2020 count
Owner
County
County Highway Agency

About this bridge

Independence RD over Stream is a prestressed concrete stringer/multi-beam or girder carrying Independence RD over Stream in Thurston County, Washington. It was built in 2010, so it is 15 years old, younger 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 888 vehicles a day, roughly 15% of them trucks, projected to reach 1,373 by 2042. The structure is 106 ft (32.3 m) long and 32 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

Location

Open in Google Maps
CarriesIndependence RD
CrossesStream
Location0.55 N of Grays County Li
RouteCounty Highway 12310
CountyThurston County
StateWashington
Coordinates46.79654, -123.15435
Functional classRural Minor Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70 US tons
Inventory rating46 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length106 ft (32.3 m)
Longest span102 ft (31.1 m)
Deck width32 ft (9.7 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic888 (2020)
Projected traffic1,373 by 2042
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.9 mi (32 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 proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$1.6 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Independence RD over Stream built?

It was built in 2010, making it 15 years old in 2025.

What condition is Independence RD over Stream 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 March 2023.

How much traffic does Independence RD over Stream carry?

About 888 vehicles per day (2020 count), of which roughly 15% are trucks.

How long is Independence RD over Stream?

The structure is 106 ft (32.3 m) long with a longest span of 102 ft (31.1 m) and a deck 32 ft wide.

Who owns Independence RD over Stream?

It is owned by the County Highway Agency.