US Bridges

370 South Road over Milner Gooding Canal

FairPosted for load

Lincoln County, Idaho · 2.0 S. 0.3 E. Dietrich · Structure no. 000000000025045

Built
1944
81 years old, rebuilt 1977
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
95 ft
4 main spans
Daily traffic
100
2023 count
Owner
Local
Other Local Agency

About this bridge

370 South Road over Milner Gooding Canal is a steel stringer/multi-beam or girder carrying 370 South Road over Milner Gooding Canal in Lincoln County, Idaho. It was built in 1944 and reconstructed in 1977, so it is 81 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 100 vehicles a day, roughly 5% of them trucks, projected to reach 150 by 2039. The structure is 95 ft (29 m) long and 27 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Carries370 South Road
CrossesMilner Gooding Canal
Location2.0 S. 0.3 E. Dietrich
RouteCounty Highway 0
StateIdaho
Coordinates42.8795, -114.26308
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating26 US tons
Inventory rating16 US tons

Structure

MaterialSteel
DeckClosed grating
Main spans4
Design loadHS 20
Structure length95 ft (29 m)
Longest span25 ft (7.6 m)
Deck width27 ft (8.2 m)
Roadway width25 ft (7.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2023)
Projected traffic150 by 2039
Trucks5%
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$859,000 (2019 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 370 South Road over Milner Gooding Canal built?

It was built in 1944, making it 81 years old in 2025. It was reconstructed in 1977.

What condition is 370 South Road over Milner Gooding 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 370 South Road over Milner Gooding Canal carry?

About 100 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is 370 South Road over Milner Gooding Canal?

The structure is 95 ft (29 m) long with a longest span of 25 ft (7.6 m) and a deck 27 ft wide.

Who owns 370 South Road over Milner Gooding Canal?

It is owned by the Other Local Agency.