US Bridges

Stc 3810; Frontage over Snake R.;glenns Ferry Br

Fair

Elmore County, Idaho · 0.2N 1.0E Glenns Ferry · Structure no. 000000000019875

Built
1968
57 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
511 ft
5 main spans
Daily traffic
430
2023 count
Owner
Local
Other Local Agency

About this bridge

Stc 3810; Frontage over Snake R.;glenns Ferry Br is a prestressed concrete stringer/multi-beam or girder carrying Stc 3810; Frontage over Snake R.;glenns Ferry Br in Elmore County, Idaho. It was built in 1968, so it is 57 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 430 vehicles a day, projected to reach 645 by 2042. The structure is 511 ft (155.8 m) long and 32 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesStc 3810; Frontage
CrossesSnake R.;glenns Ferry Br
Location0.2N 1.0E Glenns Ferry
RouteCounty Highway 3810
CountyElmore County
StateIdaho
Coordinates42.95903, -115.28003
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating84 US tons
Inventory rating49.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length511 ft (155.8 m)
Longest span103 ft (31.4 m)
Deck width32 ft (9.7 m)
Roadway width29 ft (8.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic430 (2023)
Projected traffic645 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 Stc 3810; Frontage over Snake R.;glenns Ferry Br built?

It was built in 1968, making it 57 years old in 2025.

What condition is Stc 3810; Frontage over Snake R.;glenns Ferry 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 March 2023.

How much traffic does Stc 3810; Frontage over Snake R.;glenns Ferry Br carry?

About 430 vehicles per day (2023 count).

How long is Stc 3810; Frontage over Snake R.;glenns Ferry Br?

The structure is 511 ft (155.8 m) long with a longest span of 103 ft (31.4 m) and a deck 32 ft wide.

Who owns Stc 3810; Frontage over Snake R.;glenns Ferry Br?

It is owned by the Other Local Agency.