US Bridges

Mineral Springs RD over Wind River

Good

Skamania County, Washington · MP 0.18 Mineral Springs R · Structure no. 084311000000000

Built
1977
48 years old
Condition
Good
inspected July 2023
Type
Tee Beam
Prestressed Concrete
Length
102 ft
1 main span
Daily traffic
59
2023 count
Owner
County
County Highway Agency

About this bridge

Mineral Springs RD over Wind River is a prestressed concrete tee beam carrying Mineral Springs RD over Wind River in Skamania County, Washington. It was built in 1977, so it is 48 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 59 vehicles a day, roughly 10% of them trucks, projected to reach 64 by 2043. The structure is 102 ft (31.1 m) long and 30 ft wide. If it were closed, the detour would be 16.2 mi (26 km).

CarriesMineral Springs RD
CrossesWind River
LocationMP 0.18 Mineral Springs R
RouteCounty Highway 21350
Coordinates45.87472, -121.97833
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating21.4 US tons
Inventory rating16.4 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length102 ft (31.1 m)
Longest span100 ft (30.5 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic59 (2023)
Projected traffic64 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.2 mi (26 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$4 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Mineral Springs RD over Wind River built?

It was built in 1977, making it 48 years old in 2025.

What condition is Mineral Springs RD over Wind River 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 July 2023.

How much traffic does Mineral Springs RD over Wind River carry?

About 59 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Mineral Springs RD over Wind River?

The structure is 102 ft (31.1 m) long with a longest span of 100 ft (30.5 m) and a deck 30 ft wide.

Who owns Mineral Springs RD over Wind River?

It is owned by the County Highway Agency.