US Bridges

GARFLD-FRMGTN/1300 over Silver Creek

Fair

Whitman County, Washington · 5.39 MI S Farmington · Structure no. 084113000000000

Built
1974
51 years old
Condition
Fair
inspected November 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
30 ft
1 main span
Daily traffic
201
2022 count
Owner
County
County Highway Agency

About this bridge

GARFLD-FRMGTN/1300 over Silver Creek is a prestressed concrete stringer/multi-beam or girder carrying GARFLD-FRMGTN/1300 over Silver Creek in Whitman County, Washington. It was built in 1974, so it is 51 years old, older than the Washington average of 49.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 201 vehicles a day, roughly 11% of them trucks, projected to reach 222 by 2044. The structure is 30 ft (9.1 m) long and 28 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

Location

Open in Google Maps
CarriesGARFLD-FRMGTN/1300
CrossesSilver Creek
Location5.39 MI S Farmington
RouteCounty Highway 13000
CountyWhitman County
StateWashington
Coordinates47.03035, -117.05877
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating20.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length30 ft (9.1 m)
Longest span29 ft (8.7 m)
Deck width28 ft (8.5 m)
Roadway width28 ft (8.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic201 (2022)
Projected traffic222 by 2044
Trucks11%
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.4 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

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

It was built in 1974, making it 51 years old in 2025.

What condition is GARFLD-FRMGTN/1300 over Silver Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in November 2023.

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

About 201 vehicles per day (2022 count), of which roughly 11% are trucks.

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

The structure is 30 ft (9.1 m) long with a longest span of 29 ft (8.7 m) and a deck 28 ft wide.

Who owns GARFLD-FRMGTN/1300 over Silver Creek?

It is owned by the County Highway Agency.