US Bridges

STC3816;OLD HWY 30 over Bennett Creek

Fair

Elmore County, Idaho · 0.1 N. 1.4 W. Hammett · Structure no. 000000000019910

Built
1956
69 years old
Condition
Fair
inspected March 2023
Type
Frame
Concrete
Length
21 ft
1 main span
Daily traffic
740
2023 count
Owner
Local
Other Local Agency

About this bridge

STC3816;OLD HWY 30 over Bennett Creek is a concrete frame carrying STC3816;OLD HWY 30 over Bennett Creek in Elmore County, Idaho. It was built in 1956, so it is 69 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 740 vehicles a day, roughly 6% of them trucks, projected to reach 1,110 by 2042. The structure is 21 ft (6.4 m) long and 50 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesSTC3816;OLD HWY 30
CrossesBennett Creek
Location0.1 N. 1.4 W. Hammett
RouteCounty Highway 3816
CountyElmore County
StateIdaho
Coordinates42.94664, -115.49303
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating49.1 US tons
Inventory rating29 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length21 ft (6.4 m)
Longest span21 ft (6.4 m)
Deck width50 ft (15.2 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic740 (2023)
Projected traffic1,110 by 2042
Trucks6%
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

OwnerOther Local Agency
Maintained byOther Local 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 STC3816;OLD HWY 30 over Bennett Creek built?

It was built in 1956, making it 69 years old in 2025.

What condition is STC3816;OLD HWY 30 over Bennett 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 March 2023.

How much traffic does STC3816;OLD HWY 30 over Bennett Creek carry?

About 740 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is STC3816;OLD HWY 30 over Bennett Creek?

The structure is 21 ft (6.4 m) long with a longest span of 21 ft (6.4 m) and a deck 50 ft wide.

Who owns STC3816;OLD HWY 30 over Bennett Creek?

It is owned by the Other Local Agency.