US Bridges

Maple Street over Wilson Creek

Good

Grant County, Washington · .1 MI E of Fourth · Structure no. 081483000000000

Built
1979
46 years old
Condition
Good
inspected October 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
77 ft
1 main span
Daily traffic
30
2024 count
Owner
City
City or Municipal Highway Agency

About this bridge

Maple Street over Wilson Creek is a prestressed concrete stringer/multi-beam or girder carrying Maple Street over Wilson Creek in Grant County, Washington. It was built in 1979, so it is 46 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 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 30 vehicles a day, roughly 10% of them trucks, projected to reach 45 by 2041. The structure is 77 ft (23.5 m) long and 38 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesMaple Street
CrossesWilson Creek
Location.1 MI E of Fourth
RouteCity Street 52300
Coordinates47.42038, -119.12008
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 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating39.7 US tons
Inventory rating25.4 US tons

Structure

MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length77 ft (23.5 m)
Longest span76 ft (23.2 m)
Deck width38 ft (11.6 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (2024)
Projected traffic45 by 2041
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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 proposedDeck rehabilitation with only incidental widening
Estimated improvement cost$1.4 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Maple Street over Wilson Creek built?

It was built in 1979, making it 46 years old in 2025.

What condition is Maple Street over Wilson 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 2024.

How much traffic does Maple Street over Wilson Creek carry?

About 30 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Maple Street over Wilson Creek?

The structure is 77 ft (23.5 m) long with a longest span of 76 ft (23.2 m) and a deck 38 ft wide.

Who owns Maple Street over Wilson Creek?

It is owned by the City or Municipal Highway Agency.