US Bridges

E 300 N over Drybed Canal;e.Grover Br

Fair

Jefferson County, Idaho · 5.6 E. Rigby · Structure no. 000000000032275

Built
1977
48 years old
Condition
Fair
inspected March 2024
Type
Tee Beam
Prestressed Concrete
Length
97 ft
2 main spans
Daily traffic
400
2023 count
Owner
County
County Highway Agency

About this bridge

E 300 N over Drybed Canal;e.Grover Br is a prestressed concrete tee beam carrying E 300 N over Drybed Canal;e.Grover Br in Jefferson County, Idaho. It was built in 1977, so it is 48 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 400 vehicles a day, roughly 14% of them trucks, projected to reach 600 by 2042. The structure is 97 ft (29.5 m) long and 30 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesE 300 N
CrossesDrybed Canal;e.Grover Br
Location5.6 E. Rigby
RouteCounty Highway 0
CountyJefferson County
StateIdaho
Coordinates43.67022, -111.80139
Functional classRural Minor 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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating38 US tons
Inventory rating23 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadH 20
Structure length97 ft (29.5 m)
Longest span47 ft (14.3 m)
Deck width30 ft (9.2 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic400 (2023)
Projected traffic600 by 2042
Trucks14%
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.1 million (2018 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was E 300 N over Drybed Canal;e.Grover Br built?

It was built in 1977, making it 48 years old in 2025.

What condition is E 300 N over Drybed Canal;e.Grover 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 2024.

How much traffic does E 300 N over Drybed Canal;e.Grover Br carry?

About 400 vehicles per day (2023 count), of which roughly 14% are trucks.

How long is E 300 N over Drybed Canal;e.Grover Br?

The structure is 97 ft (29.5 m) long with a longest span of 47 ft (14.3 m) and a deck 30 ft wide.

Who owns E 300 N over Drybed Canal;e.Grover Br?

It is owned by the County Highway Agency.