US Bridges

Sma 7288;HILL RD over Farmers Union Canal

Fair

Ada County, Idaho · In Boise · Structure no. 000000000033415

Built
1963
62 years old, rebuilt 1981
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
28 ft
1 main span
Daily traffic
4,000
2023 count
Owner
County
County Highway Agency

About this bridge

Sma 7288;HILL RD over Farmers Union Canal is a steel stringer/multi-beam or girder carrying Sma 7288;HILL RD over Farmers Union Canal in Ada County, Idaho. It was built in 1963 and reconstructed in 1981, so it is 62 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 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 4,000 vehicles a day, roughly 2% of them trucks, projected to reach 6,000 by 2042. The structure is 28 ft (8.5 m) long and 68 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesSma 7288;HILL RD
CrossesFarmers Union Canal
LocationIn Boise
RouteCity Street 7288
CountyAda County
StateIdaho
Coordinates43.67789, -116.26853
Functional classRural Minor Arterial

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 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating37 US tons
Inventory rating22 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length28 ft (8.5 m)
Longest span25 ft (7.6 m)
Deck width68 ft (20.6 m)
Roadway width35 ft (10.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,000 (2023)
Projected traffic6,000 by 2042
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.1 mi (5 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$704,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Sma 7288;HILL RD over Farmers Union Canal built?

It was built in 1963, making it 62 years old in 2025. It was reconstructed in 1981.

What condition is Sma 7288;HILL RD over Farmers Union 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 Sma 7288;HILL RD over Farmers Union Canal carry?

About 4,000 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is Sma 7288;HILL RD over Farmers Union Canal?

The structure is 28 ft (8.5 m) long with a longest span of 25 ft (7.6 m) and a deck 68 ft wide.

Who owns Sma 7288;HILL RD over Farmers Union Canal?

It is owned by the County Highway Agency.