US Bridges

Treasure Lane over Marsh Creek

Fair

Bannock County, Idaho · 0.3 N. 3.1 W. Downey · Structure no. 000000000022000

Built
1970
55 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
136 ft
3 main spans
Daily traffic
260
2023 count
Owner
Local
Other Local Agency

About this bridge

Treasure Lane over Marsh Creek is a prestressed concrete stringer/multi-beam or girder carrying Treasure Lane over Marsh Creek in Bannock County, Idaho. It was built in 1970, so it is 55 years old, older than the Idaho average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 260 vehicles a day, roughly 18% of them trucks, projected to reach 390 by 2042. The structure is 136 ft (41.5 m) long and 32 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesTreasure Lane
CrossesMarsh Creek
Location0.3 N. 3.1 W. Downey
RouteCounty Highway 0
CountyBannock County
StateIdaho
Coordinates42.43069, -112.18797
Functional classRural Minor Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57 US tons
Inventory rating34 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length136 ft (41.5 m)
Longest span44 ft (13.4 m)
Deck width32 ft (9.7 m)
Roadway width29 ft (8.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic260 (2023)
Projected traffic390 by 2042
Trucks18%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerOther Local Agency
Maintained byOther Local 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 Treasure Lane over Marsh Creek built?

It was built in 1970, making it 55 years old in 2025.

What condition is Treasure Lane over Marsh Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in April 2023.

How much traffic does Treasure Lane over Marsh Creek carry?

About 260 vehicles per day (2023 count), of which roughly 18% are trucks.

How long is Treasure Lane over Marsh Creek?

The structure is 136 ft (41.5 m) long with a longest span of 44 ft (13.4 m) and a deck 32 ft wide.

Who owns Treasure Lane over Marsh Creek?

It is owned by the Other Local Agency.