US Bridges

Anderson Creek RD over Anderson Creek

Poor

Boise County, Idaho · 0.2 E. 0.1 S. Crouch · Structure no. 000000000026693

Built
1983
42 years old, rebuilt 1994
Condition
Poor
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
30 ft
1 main span
Daily traffic
100
2023 count
Owner
County
County Highway Agency

About this bridge

Anderson Creek RD over Anderson Creek is a steel stringer/multi-beam or girder carrying Anderson Creek RD over Anderson Creek in Boise County, Idaho. It was built in 1983 and reconstructed in 1994, so it is 42 years old, younger than the Idaho average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 100 vehicles a day, roughly 5% of them trucks, projected to reach 150 by 2039. The structure is 30 ft (9.1 m) long and 16 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesAnderson Creek RD
CrossesAnderson Creek
Location0.2 E. 0.1 S. Crouch
RouteCounty Highway 0
StateIdaho
Coordinates44.11386, -115.96647
Functional classRural Minor Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating98 US tons
Inventory rating58 US tons

Structure

MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHS 20
Structure length30 ft (9.1 m)
Longest span29 ft (8.8 m)
Deck width16 ft (4.9 m)
Roadway width15 ft (4.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2023)
Projected traffic150 by 2039
Trucks5%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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$378,000 (2019 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Anderson Creek RD over Anderson Creek built?

It was built in 1983, making it 42 years old in 2025. It was reconstructed in 1994.

What condition is Anderson Creek RD over Anderson Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in September 2024.

How much traffic does Anderson Creek RD over Anderson Creek carry?

About 100 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Anderson Creek RD over Anderson Creek?

The structure is 30 ft (9.1 m) long with a longest span of 29 ft (8.8 m) and a deck 16 ft wide.

Who owns Anderson Creek RD over Anderson Creek?

It is owned by the County Highway Agency.