US Bridges

Gladhart over Little Weiser River

Good

Washington County, Idaho · 1.1 S. 4.0 E. Cambridge · Structure no. 000000000028765

Built
1990
35 years old
Condition
Good
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
68 ft
1 main span
Daily traffic
50
2023 count
Owner
County
County Highway Agency

About this bridge

Gladhart over Little Weiser River is a steel stringer/multi-beam or girder carrying Gladhart over Little Weiser River in Washington County, Idaho. It was built in 1990, so it is 35 years old, younger than the Idaho average of 45.3 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 50 vehicles a day, roughly 5% of them trucks, projected to reach 75 by 2039. The structure is 68 ft (20.7 m) long and 18 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesGladhart
CrossesLittle Weiser River
Location1.1 S. 4.0 E. Cambridge
RouteCounty Highway 0
StateIdaho
Coordinates44.55594, -116.59497
Functional classRural Local

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 protection7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66 US tons
Inventory rating39 US tons

Structure

MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHS 20
Structure length68 ft (20.7 m)
Longest span67 ft (20.4 m)
Deck width18 ft (5.5 m)
Roadway width18 ft (5.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2023)
Projected traffic75 by 2039
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 Gladhart over Little Weiser River built?

It was built in 1990, making it 35 years old in 2025.

What condition is Gladhart over Little Weiser River 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 July 2024.

How much traffic does Gladhart over Little Weiser River carry?

About 50 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Gladhart over Little Weiser River?

The structure is 68 ft (20.7 m) long with a longest span of 67 ft (20.4 m) and a deck 18 ft wide.

Who owns Gladhart over Little Weiser River?

It is owned by the County Highway Agency.