US Bridges

Stc 3830;DALLAS RD over Drainage Lateral

Fair

Payette County, Idaho · 1.8S 4.2E New Plymouth · Structure no. 000000000028480

Built
1951
74 years old, rebuilt 1965
Condition
Fair
inspected June 2021
Type
Tee Beam
Prestressed Concrete
Length
31 ft
1 main span
Daily traffic
480
2023 count
Owner
County
County Highway Agency

About this bridge

Stc 3830;DALLAS RD over Drainage Lateral is a prestressed concrete tee beam carrying Stc 3830;DALLAS RD over Drainage Lateral in Payette County, Idaho. It was built in 1951 and reconstructed in 1965, so it is 74 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 480 vehicles a day, roughly 4% of them trucks, projected to reach 720 by 2042. The structure is 31 ft (9.4 m) long and 24 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesStc 3830;DALLAS RD
CrossesDrainage Lateral
Location1.8S 4.2E New Plymouth
RouteCounty Highway 3830
CountyPayette County
StateIdaho
Coordinates43.94903, -116.73783
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 inspectionJune 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating35.7 US tons
Inventory rating25.8 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 15
Structure length31 ft (9.4 m)
Longest span30 ft (9.1 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic480 (2023)
Projected traffic720 by 2042
Trucks4%
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

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$446,000 (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Stc 3830;DALLAS RD over Drainage Lateral built?

It was built in 1951, making it 74 years old in 2025. It was reconstructed in 1965.

What condition is Stc 3830;DALLAS RD over Drainage Lateral 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 June 2021.

How much traffic does Stc 3830;DALLAS RD over Drainage Lateral carry?

About 480 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Stc 3830;DALLAS RD over Drainage Lateral?

The structure is 31 ft (9.4 m) long with a longest span of 30 ft (9.1 m) and a deck 24 ft wide.

Who owns Stc 3830;DALLAS RD over Drainage Lateral?

It is owned by the County Highway Agency.