US Bridges

4th of July CR RD over Fourth of July Creek

Good

Lemhi County, Idaho · 2.0 S 4.0 E North Fork · Structure no. 000000000034680

Built
2013
12 years old
Condition
Good
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
51 ft
1 main span
Daily traffic
70
2023 count
Owner
County
County Highway Agency

About this bridge

4th of July CR RD over Fourth of July Creek is a steel stringer/multi-beam or girder carrying 4th of July CR RD over Fourth of July Creek in Lemhi County, Idaho. It was built in 2013, so it is 12 years old, younger 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 70 vehicles a day, roughly 10% of them trucks, projected to reach 105 by 2039. The structure is 51 ft (15.5 m) long and 33 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
Carries4th of July CR RD
CrossesFourth of July Creek
Location2.0 S 4.0 E North Fork
RouteCounty Highway 0
CountyLemhi County
StateIdaho
Coordinates45.37725, -113.90747
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating67 US tons
Inventory rating40 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHS 20
Structure length51 ft (15.5 m)
Longest span46 ft (14 m)
Deck width33 ft (10.1 m)
Roadway width33 ft (10 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic70 (2023)
Projected traffic105 by 2039
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 4th of July CR RD over Fourth of July Creek built?

It was built in 2013, making it 12 years old in 2025.

What condition is 4th of July CR RD over Fourth of July 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 July 2023.

How much traffic does 4th of July CR RD over Fourth of July Creek carry?

About 70 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is 4th of July CR RD over Fourth of July Creek?

The structure is 51 ft (15.5 m) long with a longest span of 46 ft (14 m) and a deck 33 ft wide.

Who owns 4th of July CR RD over Fourth of July Creek?

It is owned by the County Highway Agency.