US Bridges

Baseline RD;1200 N over Great Western Canal

Fair

Bingham County, Idaho · 1.0 S 3.2 W Shelley · Structure no. 000000000022636

Built
2001
24 years old
Condition
Fair
inspected March 2023
Type
Slab
Concrete
Length
22 ft
1 main span
Daily traffic
190
2023 count
Owner
County
County Highway Agency

About this bridge

Baseline RD;1200 N over Great Western Canal is a concrete slab carrying Baseline RD;1200 N over Great Western Canal in Bingham County, Idaho. It was built in 2001, so it is 24 years old, younger 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 190 vehicles a day, roughly 10% of them trucks, projected to reach 285 by 2039. The structure is 22 ft (6.7 m) long and 39 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesBaseline RD;1200 N
CrossesGreat Western Canal
Location1.0 S 3.2 W Shelley
RouteCounty Highway 0
CountyBingham County
StateIdaho
Coordinates43.36706, -112.18683
Functional classRural Local

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 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating72 US tons
Inventory rating43 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length22 ft (6.7 m)
Longest span22 ft (6.7 m)
Deck width39 ft (11.9 m)
Roadway width37 ft (11.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic190 (2023)
Projected traffic285 by 2039
Trucks10%
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

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 Baseline RD;1200 N over Great Western Canal built?

It was built in 2001, making it 24 years old in 2025.

What condition is Baseline RD;1200 N over Great Western Canal 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 Baseline RD;1200 N over Great Western Canal carry?

About 190 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Baseline RD;1200 N over Great Western Canal?

The structure is 22 ft (6.7 m) long with a longest span of 22 ft (6.7 m) and a deck 39 ft wide.

Who owns Baseline RD;1200 N over Great Western Canal?

It is owned by the County Highway Agency.