US Bridges

30 South Road over Milner Gooding Canal

PoorPosted for load

Lincoln County, Idaho · 0.3 S. 1.8 E. Shoshone · Structure no. 000000000024965

Built
1977
48 years old
Condition
Poor
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
79 ft
4 main spans
Daily traffic
20
2023 count
Owner
Local
Other Local Agency

About this bridge

30 South Road over Milner Gooding Canal is a steel stringer/multi-beam or girder carrying 30 South Road over Milner Gooding Canal in Lincoln 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 poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 20 vehicles a day, roughly 10% of them trucks, projected to reach 30 by 2039. The structure is 79 ft (24.1 m) long and 16 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Carries30 South Road
CrossesMilner Gooding Canal
Location0.3 S. 1.8 E. Shoshone
RouteCounty Highway 0
StateIdaho
Coordinates42.93033, -114.37431
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

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.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry8: Equal to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating48 US tons
Inventory rating29 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length79 ft (24.1 m)
Longest span20 ft (6.1 m)
Deck width16 ft (5 m)
Roadway width16 ft (4.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (2023)
Projected traffic30 by 2039
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-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$706,000 (2017 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 30 South Road over Milner Gooding Canal built?

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

What condition is 30 South Road over Milner Gooding Canal in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in March 2024.

How much traffic does 30 South Road over Milner Gooding Canal carry?

About 20 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is 30 South Road over Milner Gooding Canal?

The structure is 79 ft (24.1 m) long with a longest span of 20 ft (6.1 m) and a deck 16 ft wide.

Who owns 30 South Road over Milner Gooding Canal?

It is owned by the Other Local Agency.