US Bridges

N.Fk. Boise R. Rd. over Mores Creek

Good

Boise County, Idaho · 2 MI East of Idaho City · Structure no. 040203000001053

Built
1955
70 years old
Condition
Good
inspected September 2023
Type
Stringer/Multi-beam or Girder
Concrete
Length
36 ft
1 main span
Daily traffic
79
1994 count
Owner
Federal
U.S. Forest Service

About this bridge

N.Fk. Boise R. Rd. over Mores Creek is a concrete stringer/multi-beam or girder carrying N.Fk. Boise R. Rd. over Mores Creek in Boise County, Idaho. It was built in 1955, so it is 70 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 79 vehicles a day, projected to reach 118 by 2045. The structure is 36 ft (11 m) long and 26 ft wide. If it were closed, the detour would be 17.4 mi (28 km).

Location

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CarriesN.Fk. Boise R. Rd.
CrossesMores Creek
Location2 MI East of Idaho City
RouteFederal Lands Road 327
CountyBoise County
StateIdaho
Coordinates43.83072, -115.79189
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 protection8 Very GoodNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating22.8 US tons
Inventory rating17.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length36 ft (11 m)
Longest span35 ft (10.7 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic79 (1994)
Projected traffic118 by 2045
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed17.4 mi (28 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 N.Fk. Boise R. Rd. over Mores Creek built?

It was built in 1955, making it 70 years old in 2025.

What condition is N.Fk. Boise R. Rd. over Mores 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 2023.

How much traffic does N.Fk. Boise R. Rd. over Mores Creek carry?

About 79 vehicles per day (1994 count).

How long is N.Fk. Boise R. Rd. over Mores Creek?

The structure is 36 ft (11 m) long with a longest span of 35 ft (10.7 m) and a deck 26 ft wide.

Who owns N.Fk. Boise R. Rd. over Mores Creek?

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