US Bridges

GARFLD-FRMGTN/1300 over Silver Creek

Good

Whitman County, Washington · 9.67 MI SW Farmington · Structure no. 087706000000000

Built
2008
17 years old
Condition
Good
inspected November 2024
Type
Tee Beam
Prestressed Concrete
Length
110 ft
1 main span
Daily traffic
238
2020 count
Owner
County
County Highway Agency

About this bridge

GARFLD-FRMGTN/1300 over Silver Creek is a prestressed concrete tee beam carrying GARFLD-FRMGTN/1300 over Silver Creek in Whitman County, Washington. It was built in 2008, so it is 17 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 238 vehicles a day, roughly 25% of them trucks, projected to reach 243 by 2039. The structure is 110 ft (33.5 m) long and 34 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

CarriesGARFLD-FRMGTN/1300
CrossesSilver Creek
Location9.67 MI SW Farmington
RouteCounty Highway 13000
Coordinates47.01037, -117.12027
Functional classRural Major 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 inspectionNovember 2024
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 rating60.7 US tons
Inventory rating46.7 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 25 or greater
Structure length110 ft (33.5 m)
Longest span107 ft (32.6 m)
Deck width34 ft (10.4 m)
Roadway width32 ft (9.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic238 (2020)
Projected traffic243 by 2039
Trucks25%
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 statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$4.3 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was GARFLD-FRMGTN/1300 over Silver Creek built?

It was built in 2008, making it 17 years old in 2025.

What condition is GARFLD-FRMGTN/1300 over Silver 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 November 2024.

How much traffic does GARFLD-FRMGTN/1300 over Silver Creek carry?

About 238 vehicles per day (2020 count), of which roughly 25% are trucks.

How long is GARFLD-FRMGTN/1300 over Silver Creek?

The structure is 110 ft (33.5 m) long with a longest span of 107 ft (32.6 m) and a deck 34 ft wide.

Who owns GARFLD-FRMGTN/1300 over Silver Creek?

It is owned by the County Highway Agency.