US Bridges

STC8215;WEISER Rvr over Manns Creek

Fair

Washington County, Idaho · 0.3 S. 5.1 E. Weiser · Structure no. 000000000020005

Built
1954
71 years old
Condition
Fair
inspected November 2023
Type
Tee Beam
Concrete
Length
27 ft
1 main span
Daily traffic
330
2023 count
Owner
County
County Highway Agency

About this bridge

STC8215;WEISER Rvr over Manns Creek is a concrete tee beam carrying STC8215;WEISER Rvr over Manns Creek in Washington County, Idaho. It was built in 1954, so it is 71 years old, older 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 330 vehicles a day, roughly 27% of them trucks, projected to reach 495 by 2042. The structure is 27 ft (8.2 m) long and 25 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesSTC8215;WEISER Rvr
CrossesManns Creek
Location0.3 S. 5.1 E. Weiser
RouteCounty Highway 8215
CountyWashington County
StateIdaho
Coordinates44.24194, -116.86742
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating37 US tons
Inventory rating22 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length27 ft (8.2 m)
Longest span26 ft (7.9 m)
Deck width25 ft (7.5 m)
Roadway width22 ft (6.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic330 (2023)
Projected traffic495 by 2042
Trucks27%
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$396,000 (2019 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was STC8215;WEISER Rvr over Manns Creek built?

It was built in 1954, making it 71 years old in 2025.

What condition is STC8215;WEISER Rvr over Manns 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 STC8215;WEISER Rvr over Manns Creek carry?

About 330 vehicles per day (2023 count), of which roughly 27% are trucks.

How long is STC8215;WEISER Rvr over Manns Creek?

The structure is 27 ft (8.2 m) long with a longest span of 26 ft (7.9 m) and a deck 25 ft wide.

Who owns STC8215;WEISER Rvr over Manns Creek?

It is owned by the County Highway Agency.