US Bridges

Whistocken RD over Little Hangman Creek

Good

Benewah County, Idaho · 0.5 N. 0.8 E. Tilma · Structure no. 000000000030035

Built
1950
75 years old, rebuilt 1998
Condition
Good
inspected September 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
64 ft
1 main span
Daily traffic
30
2023 count
Owner
Local
Other Local Agency

About this bridge

Whistocken RD over Little Hangman Creek is a prestressed concrete stringer/multi-beam or girder carrying Whistocken RD over Little Hangman Creek in Benewah County, Idaho. It was built in 1950 and reconstructed in 1998, so it is 75 years old, older 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 30 vehicles a day, roughly 50% of them trucks, projected to reach 45 by 2042. The structure is 64 ft (19.5 m) long and 30 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesWhistocken RD
CrossesLittle Hangman Creek
Location0.5 N. 0.8 E. Tilma
RouteCounty Highway 0
StateIdaho
Coordinates47.24807, -117.02511
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
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating50 US tons
Inventory rating22 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length64 ft (19.5 m)
Longest span59 ft (18 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (2023)
Projected traffic45 by 2042
Trucks50%
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

OwnerOther Local Agency
Maintained byOther Local Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$617,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Whistocken RD over Little Hangman Creek built?

It was built in 1950, making it 75 years old in 2025. It was reconstructed in 1998.

What condition is Whistocken RD over Little Hangman 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 September 2024.

How much traffic does Whistocken RD over Little Hangman Creek carry?

About 30 vehicles per day (2023 count), of which roughly 50% are trucks.

How long is Whistocken RD over Little Hangman Creek?

The structure is 64 ft (19.5 m) long with a longest span of 59 ft (18 m) and a deck 30 ft wide.

Who owns Whistocken RD over Little Hangman Creek?

It is owned by the Other Local Agency.