US Bridges

Trout Road over Seven Suckers Ditch

Fair

Ada County, Idaho · Idfg Eagle Hatchery · Structure no. 000000000034093

Built
1950
75 years old, rebuilt 2020
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
23 ft
1 main span
Daily traffic
50
2023 count
Owner
State
Other State Agency

About this bridge

Trout Road over Seven Suckers Ditch is a wood or timber stringer/multi-beam or girder carrying Trout Road over Seven Suckers Ditch in Ada County, Idaho. It was built in 1950 and reconstructed in 2020, so it is 75 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.

It carries about 50 vehicles a day, projected to reach 75 by 2039. The structure is 23 ft (7 m) long and 17 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesTrout Road
CrossesSeven Suckers Ditch
LocationIdfg Eagle Hatchery
CountyAda County
StateIdaho
Coordinates43.6771, -116.40338
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
Deck8 Very GoodNo problems noted.
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 inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating47 US tons
Inventory rating34 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadUnknown
Structure length23 ft (7 m)
Longest span21 ft (6.4 m)
Deck width17 ft (5.2 m)
Roadway width14 ft (4.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2023)
Projected traffic75 by 2039
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerOther State Agency
Maintained byOther State Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$255,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Trout Road over Seven Suckers Ditch built?

It was built in 1950, making it 75 years old in 2025. It was reconstructed in 2020.

What condition is Trout Road over Seven Suckers Ditch 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 October 2024.

How much traffic does Trout Road over Seven Suckers Ditch carry?

About 50 vehicles per day (2023 count).

How long is Trout Road over Seven Suckers Ditch?

The structure is 23 ft (7 m) long with a longest span of 21 ft (6.4 m) and a deck 17 ft wide.

Who owns Trout Road over Seven Suckers Ditch?

It is owned by the Other State Agency.