US Bridges

STC2714;3700 North over Rock Creek

Poor

Twin Falls County, Idaho · 1.0 S. 0.4 E. Twin Falls · Structure no. 000000000019365

Built
1973
52 years old
Condition
Poor
inspected October 2024
Type
Culvert
Steel
Length
21 ft
1 main span
Daily traffic
6,000
2023 count
Owner
Local
Other Local Agency

About this bridge

STC2714;3700 North over Rock Creek is a steel culvert carrying STC2714;3700 North over Rock Creek in Twin Falls County, Idaho. It was built in 1973, so it is 52 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 4 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.

It carries about 6,000 vehicles a day, roughly 7% of them trucks, projected to reach 9,000 by 2042. The structure is 21 ft (6.4 m) long and 176 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesSTC2714;3700 North
CrossesRock Creek
Location1.0 S. 0.4 E. Twin Falls
RouteCounty Highway 2714
CountyTwin Falls County
StateIdaho
Coordinates42.53403, -114.45214
Functional classUrban Minor Arterial

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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionOctober 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be 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 width176 ft (53.6 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,000 (2023)
Projected traffic9,000 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$832,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was STC2714;3700 North over Rock Creek built?

It was built in 1973, making it 52 years old in 2025.

What condition is STC2714;3700 North over Rock Creek 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 STC2714;3700 North over Rock Creek carry?

About 6,000 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is STC2714;3700 North 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 176 ft wide.

Who owns STC2714;3700 North over Rock Creek?

It is owned by the Other Local Agency.