US Bridges

New House Lane over Chamokane Creek

Good

Stevens County, Washington · 01.14 W JCT SR 231 · Structure no. 080921000000000

Built
1975
50 years old
Condition
Good
inspected October 2023
Type
Tee Beam
Prestressed Concrete
Length
50 ft
1 main span
Daily traffic
57
2024 count
Owner
County
County Highway Agency

About this bridge

New House Lane over Chamokane Creek is a prestressed concrete tee beam carrying New House Lane over Chamokane Creek in Stevens County, Washington. It was built in 1975, so it is 50 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 57 vehicles a day, roughly 5% of them trucks, projected to reach 75 by 2037. The structure is 50 ft (15.2 m) long and 27 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

CarriesNew House Lane
CrossesChamokane Creek
Location01.14 W JCT SR 231
RouteCounty Highway 13000
Coordinates47.94085, -117.77758
Functional classRural Local

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.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating33.2 US tons
Inventory rating20.4 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length50 ft (15.2 m)
Longest span49 ft (15 m)
Deck width27 ft (8.3 m)
Roadway width26 ft (7.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic57 (2024)
Projected traffic75 by 2037
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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$2.2 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was New House Lane over Chamokane Creek built?

It was built in 1975, making it 50 years old in 2025.

What condition is New House Lane over Chamokane Creek 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 October 2023.

How much traffic does New House Lane over Chamokane Creek carry?

About 57 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is New House Lane over Chamokane Creek?

The structure is 50 ft (15.2 m) long with a longest span of 49 ft (15 m) and a deck 27 ft wide.

Who owns New House Lane over Chamokane Creek?

It is owned by the County Highway Agency.