US Bridges

470 South Road over Milner Gooding Canal

Fair

Lincoln County, Idaho · 3.1 S. Dietrich · Structure no. 000000000024990

Built
1985
40 years old
Condition
Fair
inspected March 2023
Type
Box Beam or Girders - Multiple
Concrete
Length
84 ft
3 main spans
Daily traffic
80
2023 count
Owner
Local
Other Local Agency

About this bridge

470 South Road over Milner Gooding Canal is a concrete box beam or girders - multiple carrying 470 South Road over Milner Gooding Canal in Lincoln County, Idaho. It was built in 1985, so it is 40 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 80 vehicles a day, roughly 10% of them trucks, projected to reach 120 by 2039. The structure is 84 ft (25.6 m) long and 30 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
Carries470 South Road
CrossesMilner Gooding Canal
Location3.1 S. Dietrich
RouteCounty Highway 0
CountyLincoln County
StateIdaho
Coordinates42.86508, -114.26508
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 protection8 Very GoodNo problems noted.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57 US tons
Inventory rating34 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length84 ft (25.6 m)
Longest span28 ft (8.5 m)
Deck width30 ft (9.1 m)
Roadway width27 ft (8.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic80 (2023)
Projected traffic120 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

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 470 South Road over Milner Gooding Canal built?

It was built in 1985, making it 40 years old in 2025.

What condition is 470 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 470 South Road over Milner Gooding Canal carry?

About 80 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is 470 South Road over Milner Gooding Canal?

The structure is 84 ft (25.6 m) long with a longest span of 28 ft (8.5 m) and a deck 30 ft wide.

Who owns 470 South Road over Milner Gooding Canal?

It is owned by the Other Local Agency.