US Bridges

S1720;N Plsnt Vly over Aberdeen Springfield Cnl

Good

Power County, Idaho · 4.1 N. 2 W American Falls · Structure no. 000000000019116

Built
2014
11 years old
Condition
Good
inspected March 2021
Type
Box Beam or Girders - Multiple
Concrete
Length
50 ft
1 main span
Daily traffic
1,100
2023 count
Owner
County
County Highway Agency

About this bridge

S1720;N Plsnt Vly over Aberdeen Springfield Cnl is a concrete box beam or girders - multiple carrying S1720;N Plsnt Vly over Aberdeen Springfield Cnl in Power County, Idaho. It was built in 2014, so it is 11 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 1,100 vehicles a day, roughly 7% of them trucks, projected to reach 1,650 by 2042. The structure is 50 ft (15.2 m) long and 36 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesS1720;N Plsnt Vly
CrossesAberdeen Springfield Cnl
Location4.1 N. 2 W American Falls
RouteCounty Highway 1720
StateIdaho
Coordinates42.84889, -112.90167
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 inspectionMarch 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 adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating61.8 US tons
Inventory rating47.5 US tons

Structure

MaterialConcrete
DeckOther
Main spans1
Design loadHL 93
Structure length50 ft (15.2 m)
Longest span49 ft (14.9 m)
Deck width36 ft (11 m)
Roadway width33 ft (10.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,100 (2023)
Projected traffic1,650 by 2042
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was S1720;N Plsnt Vly over Aberdeen Springfield Cnl built?

It was built in 2014, making it 11 years old in 2025.

What condition is S1720;N Plsnt Vly over Aberdeen Springfield Cnl 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 March 2021.

How much traffic does S1720;N Plsnt Vly over Aberdeen Springfield Cnl carry?

About 1,100 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is S1720;N Plsnt Vly over Aberdeen Springfield Cnl?

The structure is 50 ft (15.2 m) long with a longest span of 49 ft (14.9 m) and a deck 36 ft wide.

Who owns S1720;N Plsnt Vly over Aberdeen Springfield Cnl?

It is owned by the County Highway Agency.