US Bridges

STC3840; Sweet-Ola over Squaw Creek

Fair

Gem County, Idaho · 4.5 S. 0.7 W. Ola · Structure no. 000000000019955

Built
1928
97 years old, rebuilt 1992
Condition
Fair
inspected July 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
62 ft
1 main span
Daily traffic
470
2023 count
Owner
County
County Highway Agency

About this bridge

STC3840; Sweet-Ola over Squaw Creek is a prestressed concrete box beam or girders - multiple carrying STC3840; Sweet-Ola over Squaw Creek in Gem County, Idaho. It was built in 1928 and reconstructed in 1992, so it is 97 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.

It carries about 470 vehicles a day, roughly 15% of them trucks, projected to reach 705 by 2042. The structure is 62 ft (18.9 m) long and 28 ft wide. If it were closed, the detour would be 26.7 mi (43 km).

Location

Open in Google Maps
CarriesSTC3840; Sweet-Ola
CrossesSquaw Creek
Location4.5 S. 0.7 W. Ola
RouteCounty Highway 3840
CountyGem County
StateIdaho
Coordinates44.11411, -116.3055
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52 US tons
Inventory rating31 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length62 ft (18.9 m)
Longest span60 ft (18.3 m)
Deck width28 ft (8.6 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic470 (2023)
Projected traffic705 by 2042
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed26.7 mi (43 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 STC3840; Sweet-Ola over Squaw Creek built?

It was built in 1928, making it 97 years old in 2025. It was reconstructed in 1992.

What condition is STC3840; Sweet-Ola over Squaw 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 July 2024.

How much traffic does STC3840; Sweet-Ola over Squaw Creek carry?

About 470 vehicles per day (2023 count), of which roughly 15% are trucks.

How long is STC3840; Sweet-Ola over Squaw Creek?

The structure is 62 ft (18.9 m) long with a longest span of 60 ft (18.3 m) and a deck 28 ft wide.

Who owns STC3840; Sweet-Ola over Squaw Creek?

It is owned by the County Highway Agency.