US Bridges

Parmenter Lane over Carmen Creek

Good

Lemhi County, Idaho · 1.5 N 2.8 E Carmen · Structure no. 000000000032773

Built
2011
14 years old
Condition
Good
inspected July 2022
Type
Stringer/Multi-beam or Girder
Steel
Length
50 ft
1 main span
Daily traffic
80
2023 count
Owner
County
County Highway Agency

About this bridge

Parmenter Lane over Carmen Creek is a steel stringer/multi-beam or girder carrying Parmenter Lane over Carmen Creek in Lemhi County, Idaho. It was built in 2011, so it is 14 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 80 vehicles a day, roughly 5% of them trucks, projected to reach 120 by 2039. The structure is 50 ft (15.2 m) long and 25 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesParmenter Lane
CrossesCarmen Creek
Location1.5 N 2.8 E Carmen
RouteCounty Highway 0
StateIdaho
Coordinates45.26561, -113.83461
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 protection8 Very GoodNo problems noted.
Last inspectionJuly 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating69 US tons
Inventory rating41 US tons

Structure

MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHS 20
Structure length50 ft (15.2 m)
Longest span49 ft (14.9 m)
Deck width25 ft (7.5 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic80 (2023)
Projected traffic120 by 2039
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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 Parmenter Lane over Carmen Creek built?

It was built in 2011, making it 14 years old in 2025.

What condition is Parmenter Lane over Carmen 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 2022.

How much traffic does Parmenter Lane over Carmen Creek carry?

About 80 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Parmenter Lane over Carmen Creek?

The structure is 50 ft (15.2 m) long with a longest span of 49 ft (14.9 m) and a deck 25 ft wide.

Who owns Parmenter Lane over Carmen Creek?

It is owned by the County Highway Agency.