US Bridges

Viola Lane over Lemhi River(bagley Br)

PoorPosted for load

Lemhi County, Idaho · 0.1 S. 0.2 W. Tendoy · Structure no. 000000000032690

Built
1991
34 years old
Condition
Poor
inspected July 2024
Type
Box Beam or Girders - Multiple
Steel
Length
74 ft
1 main span
Daily traffic
50
2023 count
Owner
County
County Highway Agency

About this bridge

Viola Lane over Lemhi River(bagley Br) is a steel box beam or girders - multiple carrying Viola Lane over Lemhi River(bagley Br) in Lemhi County, Idaho. It was built in 1991, so it is 34 years old, younger than the Idaho average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 50 vehicles a day, roughly 5% of them trucks, projected to reach 75 by 2039. The structure is 74 ft (22.6 m) long and 18 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesViola Lane
CrossesLemhi River(bagley Br)
Location0.1 S. 0.2 W. Tendoy
RouteCounty Highway 0
StateIdaho
Coordinates44.95839, -113.64708
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating23 US tons
Inventory rating13 US tons

Structure

MaterialSteel
DeckSteel plate
Main spans1
Design loadH 10
Structure length74 ft (22.6 m)
Longest span72 ft (21.9 m)
Deck width18 ft (5.4 m)
Roadway width17 ft (5.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2023)
Projected traffic75 by 2039
Trucks5%
Lanes on structure1
Traffic directionOne-lane bridge for two-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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$735,000 (2018 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Viola Lane over Lemhi River(bagley Br) built?

It was built in 1991, making it 34 years old in 2025.

What condition is Viola Lane over Lemhi River(bagley Br) in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in July 2024.

How much traffic does Viola Lane over Lemhi River(bagley Br) carry?

About 50 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Viola Lane over Lemhi River(bagley Br)?

The structure is 74 ft (22.6 m) long with a longest span of 72 ft (21.9 m) and a deck 18 ft wide.

Who owns Viola Lane over Lemhi River(bagley Br)?

It is owned by the County Highway Agency.