US Bridges

Stc 4749;OLD HWY 7 over Cottonwood Creek

Fair

Idaho County, Idaho · 7.3N. 3.0W. Grangeville · Structure no. 000000000020245

Built
1947
78 years old
Condition
Fair
inspected September 2024
Type
Frame
Concrete
Length
38 ft
1 main span
Daily traffic
850
2023 count
Owner
Local
Other Local Agency

About this bridge

Stc 4749;OLD HWY 7 over Cottonwood Creek is a concrete frame carrying Stc 4749;OLD HWY 7 over Cottonwood Creek in Idaho County, Idaho. It was built in 1947, so it is 78 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 850 vehicles a day, roughly 20% of them trucks, projected to reach 1,275 by 2042. The structure is 38 ft (11.6 m) long and 43 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesStc 4749;OLD HWY 7
CrossesCottonwood Creek
Location7.3N. 3.0W. Grangeville
RouteCounty Highway 4749
CountyIdaho County
StateIdaho
Coordinates46.03244, -116.18233
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 protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99.9 US tons
Inventory rating60 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length38 ft (11.6 m)
Longest span34 ft (10.4 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic850 (2023)
Projected traffic1,275 by 2042
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 Stc 4749;OLD HWY 7 over Cottonwood Creek built?

It was built in 1947, making it 78 years old in 2025.

What condition is Stc 4749;OLD HWY 7 over Cottonwood 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 September 2024.

How much traffic does Stc 4749;OLD HWY 7 over Cottonwood Creek carry?

About 850 vehicles per day (2023 count), of which roughly 20% are trucks.

How long is Stc 4749;OLD HWY 7 over Cottonwood Creek?

The structure is 38 ft (11.6 m) long with a longest span of 34 ft (10.4 m) and a deck 43 ft wide.

Who owns Stc 4749;OLD HWY 7 over Cottonwood Creek?

It is owned by the Other Local Agency.