US Bridges

STC7232;BLUE Lakes over Rock Creek

Poor

Twin Falls County, Idaho · On Blue Lakes;twin Falls · Structure no. 000000000021380

Built
1959
66 years old
Condition
Poor
inspected October 2024
Type
Culvert
Steel
Length
39 ft
3 main spans
Daily traffic
11,500
2023 count
Owner
Local
Other Local Agency

About this bridge

STC7232;BLUE Lakes over Rock Creek is a steel culvert carrying STC7232;BLUE Lakes over Rock Creek in Twin Falls County, Idaho. It was built in 1959, so it is 66 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 11,500 vehicles a day, roughly 6% of them trucks, projected to reach 17,250 by 2042. The structure is 39 ft (11.9 m) long and 195 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesSTC7232;BLUE Lakes
CrossesRock Creek
LocationOn Blue Lakes;twin Falls
RouteCounty Highway 7232
CountyTwin Falls County
StateIdaho
Coordinates42.54294, -114.45997
Functional classUrban Collector

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 geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating99.9 US tons
Inventory rating99.9 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans3
Design loadHS 20
Structure length39 ft (11.9 m)
Longest span10 ft (3 m)
Deck width195 ft (59.4 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,500 (2023)
Projected traffic17,250 by 2042
Trucks6%
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$425,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was STC7232;BLUE Lakes over Rock Creek built?

It was built in 1959, making it 66 years old in 2025.

What condition is STC7232;BLUE Lakes 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 STC7232;BLUE Lakes over Rock Creek carry?

About 11,500 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is STC7232;BLUE Lakes over Rock Creek?

The structure is 39 ft (11.9 m) long with a longest span of 10 ft (3 m) and a deck 195 ft wide.

Who owns STC7232;BLUE Lakes over Rock Creek?

It is owned by the Other Local Agency.