US Bridges

STC8315;LINCOLN RD over Fifteen Mile Creek

Good

Canyon County, Idaho · 0.5 N 5.0 E Caldwell · Structure no. 000000000027378

Built
2005
20 years old
Condition
Good
inspected April 2023
Type
Tee Beam
Prestressed Concrete
Length
41 ft
1 main span
Daily traffic
220
2023 count
Owner
Local
Other Local Agency

About this bridge

STC8315;LINCOLN RD over Fifteen Mile Creek is a prestressed concrete tee beam carrying STC8315;LINCOLN RD over Fifteen Mile Creek in Canyon County, Idaho. It was built in 2005, so it is 20 years old, younger than the Idaho average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 220 vehicles a day, projected to reach 330 by 2042. The structure is 41 ft (12.5 m) long and 42 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesSTC8315;LINCOLN RD
CrossesFifteen Mile Creek
Location0.5 N 5.0 E Caldwell
RouteCounty Highway 8315
StateIdaho
Coordinates43.674, -116.58553
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 25 or greater
Structure length41 ft (12.5 m)
Longest span39 ft (11.9 m)
Deck width42 ft (12.8 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic220 (2023)
Projected traffic330 by 2042
Trucks0%
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was STC8315;LINCOLN RD over Fifteen Mile Creek built?

It was built in 2005, making it 20 years old in 2025.

What condition is STC8315;LINCOLN RD over Fifteen Mile Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in April 2023.

How much traffic does STC8315;LINCOLN RD over Fifteen Mile Creek carry?

About 220 vehicles per day (2023 count).

How long is STC8315;LINCOLN RD over Fifteen Mile Creek?

The structure is 41 ft (12.5 m) long with a longest span of 39 ft (11.9 m) and a deck 42 ft wide.

Who owns STC8315;LINCOLN RD over Fifteen Mile Creek?

It is owned by the Other Local Agency.