US Bridges

Sma 7711; Rose RD over Snake R.;porterville Br.

Fair

Bingham County, Idaho · 3.0 N. Blackfoot · Structure no. 000000000019220

Built
1970
55 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
658 ft
6 main spans
Daily traffic
3,900
2023 count
Owner
County
County Highway Agency

About this bridge

Sma 7711; Rose RD over Snake R.;porterville Br. is a prestressed concrete stringer/multi-beam or girder carrying Sma 7711; Rose RD over Snake R.;porterville Br. in Bingham County, Idaho. It was built in 1970, so it is 55 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 3,900 vehicles a day, roughly 6% of them trucks, projected to reach 5,850 by 2042. The structure is 658 ft (200.6 m) long and 37 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesSma 7711; Rose RD
CrossesSnake R.;porterville Br.
Location3.0 N. Blackfoot
RouteCounty Highway 7711
CountyBingham County
StateIdaho
Coordinates43.22847, -112.32814
Functional classUrban Minor Arterial

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
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 rating47 US tons
Inventory rating14 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans6
Design loadH 20
Structure length658 ft (200.6 m)
Longest span108 ft (32.9 m)
Deck width37 ft (11.3 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,900 (2023)
Projected traffic5,850 by 2042
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$7.2 million (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Sma 7711; Rose RD over Snake R.;porterville Br. built?

It was built in 1970, making it 55 years old in 2025.

What condition is Sma 7711; Rose RD over Snake R.;porterville Br. 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 October 2024.

How much traffic does Sma 7711; Rose RD over Snake R.;porterville Br. carry?

About 3,900 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is Sma 7711; Rose RD over Snake R.;porterville Br.?

The structure is 658 ft (200.6 m) long with a longest span of 108 ft (32.9 m) and a deck 37 ft wide.

Who owns Sma 7711; Rose RD over Snake R.;porterville Br.?

It is owned by the County Highway Agency.