US Bridges

Mundy Gulch Road over Little Weiser River

Fair

Adams County, Idaho · 0.7 W. Indian Valley · Structure no. 000000000026470

Built
1981
44 years old
Condition
Fair
inspected August 2024
Type
Channel Beam
Prestressed Concrete
Length
61 ft
1 main span
Daily traffic
100
2023 count
Owner
County
County Highway Agency

About this bridge

Mundy Gulch Road over Little Weiser River is a prestressed concrete channel beam carrying Mundy Gulch Road over Little Weiser River in Adams County, Idaho. It was built in 1981, so it is 44 years old, younger than the Idaho average of 45.3 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 100 vehicles a day, roughly 11% of them trucks, projected to reach 150 by 2042. The structure is 61 ft (18.6 m) long and 20 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesMundy Gulch Road
CrossesLittle Weiser River
Location0.7 W. Indian Valley
RouteCounty Highway 0
CountyAdams County
StateIdaho
Coordinates44.55706, -116.45231
Functional classRural Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating73 US tons
Inventory rating28 US tons

Structure

Structure typeChannel Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length61 ft (18.6 m)
Longest span60 ft (18.3 m)
Deck width20 ft (6.1 m)
Roadway width18 ft (5.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2023)
Projected traffic150 by 2042
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Mundy Gulch Road over Little Weiser River built?

It was built in 1981, making it 44 years old in 2025.

What condition is Mundy Gulch Road over Little Weiser River 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 August 2024.

How much traffic does Mundy Gulch Road over Little Weiser River carry?

About 100 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is Mundy Gulch Road over Little Weiser River?

The structure is 61 ft (18.6 m) long with a longest span of 60 ft (18.3 m) and a deck 20 ft wide.

Who owns Mundy Gulch Road over Little Weiser River?

It is owned by the County Highway Agency.