US Bridges

Little Gse DM/7010 over Alkali Flat Creek

Good

Whitman County, Washington · 14.23 MI SW Big Alkali · Structure no. 084001000000000

Built
1972
53 years old
Condition
Good
inspected November 2024
Type
Tee Beam
Prestressed Concrete
Length
190 ft
3 main spans
Daily traffic
20
2020 count
Owner
County
County Highway Agency

About this bridge

Little Gse DM/7010 over Alkali Flat Creek is a prestressed concrete tee beam carrying Little Gse DM/7010 over Alkali Flat Creek in Whitman County, Washington. It was built in 1972, so it is 53 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 20 vehicles a day, roughly 25% of them trucks, projected to reach 20 by 2039. The structure is 190 ft (57.9 m) long and 26 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesLittle Gse DM/7010
CrossesAlkali Flat Creek
Location14.23 MI SW Big Alkali
RouteCounty Highway 70100
Coordinates46.57833, -118.08852
Functional classRural Minor Collector

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 inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
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 alignment6: Equal to present minimum criteria
Operating rating29.3 US tons
Inventory rating22.5 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length190 ft (57.9 m)
Longest span100 ft (30.5 m)
Deck width26 ft (7.9 m)
Roadway width26 ft (7.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (2020)
Projected traffic20 by 2039
Trucks25%
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

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$7.2 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Little Gse DM/7010 over Alkali Flat Creek built?

It was built in 1972, making it 53 years old in 2025.

What condition is Little Gse DM/7010 over Alkali Flat 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 Little Gse DM/7010 over Alkali Flat Creek carry?

About 20 vehicles per day (2020 count), of which roughly 25% are trucks.

How long is Little Gse DM/7010 over Alkali Flat Creek?

The structure is 190 ft (57.9 m) long with a longest span of 100 ft (30.5 m) and a deck 26 ft wide.

Who owns Little Gse DM/7010 over Alkali Flat Creek?

It is owned by the County Highway Agency.