US Bridges

County Road 1100 over Maguire Gulch

Fair

Asotin County, Washington · Maguire Gulch · Structure no. 083240000000000

Built
1948
77 years old
Condition
Fair
inspected April 2024
Type
Tee Beam
Concrete
Length
28 ft
1 main span
Daily traffic
412
2020 count
Owner
County
County Highway Agency

About this bridge

County Road 1100 over Maguire Gulch is a concrete tee beam carrying County Road 1100 over Maguire Gulch in Asotin County, Washington. It was built in 1948, so it is 77 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 6 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 412 vehicles a day, roughly 22% of them trucks, projected to reach 700 by 2040. The structure is 28 ft (8.5 m) long and 29 ft wide. If it were closed, the detour would be 39.8 mi (64 km).

Location

Open in Google Maps
CarriesCounty Road 1100
CrossesMaguire Gulch
LocationMaguire Gulch
RouteCounty Highway 110
CountyAsotin County
StateWashington
Coordinates46.32839, -117.10575
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating48.9 US tons
Inventory rating29.3 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length28 ft (8.5 m)
Longest span27 ft (8.2 m)
Deck width29 ft (8.8 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic412 (2020)
Projected traffic700 by 2040
Trucks22%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed39.8 mi (64 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 County Road 1100 over Maguire Gulch built?

It was built in 1948, making it 77 years old in 2025.

What condition is County Road 1100 over Maguire Gulch 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 April 2024.

How much traffic does County Road 1100 over Maguire Gulch carry?

About 412 vehicles per day (2020 count), of which roughly 22% are trucks.

How long is County Road 1100 over Maguire Gulch?

The structure is 28 ft (8.5 m) long with a longest span of 27 ft (8.2 m) and a deck 29 ft wide.

Who owns County Road 1100 over Maguire Gulch?

It is owned by the County Highway Agency.