US Bridges

STC6807;BIG Sprgs over Big Springs;island Pk.Br

FairPosted for load

Fremont County, Idaho · 4.8 E. Macks Inn · Structure no. 000000000032130

Built
1958
67 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
110 ft
4 main spans
Daily traffic
210
2023 count
Owner
County
County Highway Agency

About this bridge

STC6807;BIG Sprgs over Big Springs;island Pk.Br is a wood or timber stringer/multi-beam or girder carrying STC6807;BIG Sprgs over Big Springs;island Pk.Br in Fremont County, Idaho. It was built in 1958, so it is 67 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 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 210 vehicles a day, roughly 5% of them trucks, projected to reach 315 by 2042. The structure is 110 ft (33.5 m) long and 41 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesSTC6807;BIG Sprgs
CrossesBig Springs;island Pk.Br
Location4.8 E. Macks Inn
RouteCounty Highway 6807
CountyFremont County
StateIdaho
Coordinates44.49969, -111.25561
Functional classRural Major 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating30 US tons
Inventory rating20 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans4
Design loadH 20
Structure length110 ft (33.5 m)
Longest span27 ft (8.2 m)
Deck width41 ft (12.6 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic210 (2023)
Projected traffic315 by 2042
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed5 mi (8 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$1.5 million (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was STC6807;BIG Sprgs over Big Springs;island Pk.Br built?

It was built in 1958, making it 67 years old in 2025.

What condition is STC6807;BIG Sprgs over Big Springs;island Pk.Br 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 October 2024.

How much traffic does STC6807;BIG Sprgs over Big Springs;island Pk.Br carry?

About 210 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is STC6807;BIG Sprgs over Big Springs;island Pk.Br?

The structure is 110 ft (33.5 m) long with a longest span of 27 ft (8.2 m) and a deck 41 ft wide.

Who owns STC6807;BIG Sprgs over Big Springs;island Pk.Br?

It is owned by the County Highway Agency.