US Bridges

SH 31 over North Pine Creek

Good

Bonneville County, Idaho · 10.5 N. Swan Valley · Structure no. 000000000013846

Built
2019
6 years old
Condition
Good
inspected July 2021
Type
Slab
Prestressed Concrete
Length
54 ft
1 main span
Daily traffic
2,700
2023 count
Owner
State
State Highway Agency

About this bridge

SH 31 over North Pine Creek is a prestressed concrete slab carrying SH 31 over North Pine Creek in Bonneville County, Idaho. It was built in 2019, so it is 6 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 2,700 vehicles a day, roughly 11% of them trucks, projected to reach 4,050 by 2042. The structure is 54 ft (16.5 m) long and 40 ft wide. If it were closed, the detour would be 60.3 mi (97 km).

Location

Open in Google Maps
CarriesSH 31
CrossesNorth Pine Creek
Location10.5 N. Swan Valley
RouteState Highway 31
CountyBonneville County
StateIdaho
Coordinates43.56042, -111.27575
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55.3 US tons
Inventory rating42.9 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHL 93
Structure length54 ft (16.5 m)
Longest span51 ft (15.5 m)
Deck width40 ft (12.2 m)
Roadway width38 ft (11.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,700 (2023)
Projected traffic4,050 by 2042
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed60.3 mi (97 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway 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 SH 31 over North Pine Creek built?

It was built in 2019, making it 6 years old in 2025.

What condition is SH 31 over North Pine 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 July 2021.

How much traffic does SH 31 over North Pine Creek carry?

About 2,700 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is SH 31 over North Pine Creek?

The structure is 54 ft (16.5 m) long with a longest span of 51 ft (15.5 m) and a deck 40 ft wide.

Who owns SH 31 over North Pine Creek?

It is owned by the State Highway Agency.