US Bridges

Forest Road 1875 over Rainy Day Creek

Good

Idaho County, Idaho · No Data Entered · Structure no. 011708000000018

Built
1972
53 years old
Condition
Good
inspected September 2020
Type
Slab
Prestressed Concrete
Length
41 ft
1 main span
Daily traffic
40
Owner
Federal
U.S. Forest Service

About this bridge

Forest Road 1875 over Rainy Day Creek is a prestressed concrete slab carrying Forest Road 1875 over Rainy Day Creek in Idaho County, Idaho. It was built in 1972, so it is 53 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 40 vehicles a day, projected to reach 60 by 2045. The structure is 41 ft (12.5 m) long and 28 ft wide. If it were closed, the detour would be 98.2 mi (158 km).

CarriesForest Road 1875
CrossesRainy Day Creek
LocationNo Data Entered
RouteFederal Lands Road 1875
StateIdaho
Coordinates45.80341, -115.69383
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2020
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating34 US tons
Inventory rating26.1 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length41 ft (12.5 m)
Longest span40 ft (12.2 m)
Deck width28 ft (8.4 m)
Roadway width25 ft (7.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic40 (—)
Projected traffic60 by 2045
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.2 mi (158 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerU.S. Forest Service
Maintained byU.S. Forest Service
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Forest Road 1875 over Rainy Day Creek built?

It was built in 1972, making it 53 years old in 2025.

What condition is Forest Road 1875 over Rainy Day 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 2020.

How much traffic does Forest Road 1875 over Rainy Day Creek carry?

About 40 vehicles per day (latest count).

How long is Forest Road 1875 over Rainy Day Creek?

The structure is 41 ft (12.5 m) long with a longest span of 40 ft (12.2 m) and a deck 28 ft wide.

Who owns Forest Road 1875 over Rainy Day Creek?

It is owned by the U.S. Forest Service.