US Bridges

Fifth Street over S.Fk.Coeur Dalene River

PoorClosed to traffic

Shoshone County, Idaho · In Mullan;fifth Street · Structure no. 000000000030735

Built
1972
53 years old
Condition
Poor
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
35 ft
1 main span
Daily traffic
50
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Fifth Street over S.Fk.Coeur Dalene River is a steel stringer/multi-beam or girder carrying Fifth Street over S.Fk.Coeur Dalene River in Shoshone 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 poor condition with a lowest component rating of 3 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: closed to all traffic.

It carries about 50 vehicles a day, roughly 5% of them trucks, projected to reach 75 by 2039. The structure is 35 ft (10.7 m) long and 30 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesFifth Street
CrossesS.Fk.Coeur Dalene River
LocationIn Mullan;fifth Street
RouteCity Street 0
StateIdaho
Coordinates47.47031, -115.79683
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
Deck3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 12 months
Operating statusClosed to all traffic
ScourUnknown foundation; not evaluated for scour
Structural evaluation0: Immediate repair necessary to put back in service
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating17 US tons
Inventory rating10 US tons

Structure

MaterialSteel
DeckWood or timber
Main spans1
Design loadH 15
Structure length35 ft (10.7 m)
Longest span34 ft (10.4 m)
Deck width30 ft (9.1 m)
Roadway width29 ft (8.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2023)
Projected traffic75 by 2039
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$582,000 (2019 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Fifth Street over S.Fk.Coeur Dalene River built?

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

What condition is Fifth Street over S.Fk.Coeur Dalene River 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 October 2024.

How much traffic does Fifth Street over S.Fk.Coeur Dalene River carry?

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

How long is Fifth Street over S.Fk.Coeur Dalene River?

The structure is 35 ft (10.7 m) long with a longest span of 34 ft (10.4 m) and a deck 30 ft wide.

Who owns Fifth Street over S.Fk.Coeur Dalene River?

It is owned by the City or Municipal Highway Agency.