US Bridges

STC2748;EASTLAND over Rock Creek

Fair

Twin Falls County, Idaho · 1.2 S. 1.0 E. Twin Falls · Structure no. 000000000019425

Built
1979
46 years old
Condition
Fair
inspected September 2023
Type
Culvert
Steel
Length
21 ft
1 main span
Daily traffic
3,000
2023 count
Owner
Local
Other Local Agency

About this bridge

STC2748;EASTLAND over Rock Creek is a steel culvert carrying STC2748;EASTLAND over Rock Creek in Twin Falls County, Idaho. It was built in 1979, so it is 46 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 3,000 vehicles a day, roughly 7% of them trucks, projected to reach 4,500 by 2042. The structure is 21 ft (6.4 m) long and 131 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesSTC2748;EASTLAND
CrossesRock Creek
Location1.2 S. 1.0 E. Twin Falls
RouteCounty Highway 2748
CountyTwin Falls County
StateIdaho
Coordinates42.53203, -114.44075
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
Channel and channel protection7 GoodSome minor problems.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating110.1 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans1
Design loadHS 20
Structure length21 ft (6.4 m)
Longest span21 ft (6.4 m)
Deck width131 ft (40 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,000 (2023)
Projected traffic4,500 by 2042
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$447,000 (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was STC2748;EASTLAND over Rock Creek built?

It was built in 1979, making it 46 years old in 2025.

What condition is STC2748;EASTLAND over Rock 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 September 2023.

How much traffic does STC2748;EASTLAND over Rock Creek carry?

About 3,000 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is STC2748;EASTLAND over Rock Creek?

The structure is 21 ft (6.4 m) long with a longest span of 21 ft (6.4 m) and a deck 131 ft wide.

Who owns STC2748;EASTLAND over Rock Creek?

It is owned by the Other Local Agency.