US Bridges

E Milo Road over Harrison Canal

Fair

Bonneville County, Idaho · 4.5 W. Ririe · Structure no. 000000000031000

Built
1949
76 years old, rebuilt 1961
Condition
Fair
inspected November 2023
Type
Slab
Prestressed Concrete
Length
32 ft
2 main spans
Daily traffic
520
2023 count
Owner
County
County Highway Agency

About this bridge

E Milo Road over Harrison Canal is a prestressed concrete slab carrying E Milo Road over Harrison Canal in Bonneville County, Idaho. It was built in 1949 and reconstructed in 1961, so it is 76 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 520 vehicles a day, roughly 13% of them trucks, projected to reach 780 by 2042. The structure is 32 ft (9.8 m) long and 30 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesE Milo Road
CrossesHarrison Canal
Location4.5 W. Ririe
RouteCounty Highway 0
CountyBonneville County
StateIdaho
Coordinates43.62656, -111.86419
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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 adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating41.7 US tons
Inventory rating29.8 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans2
Design loadHS 20
Structure length32 ft (9.8 m)
Longest span16 ft (4.9 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic520 (2023)
Projected traffic780 by 2042
Trucks13%
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

OwnerCounty Highway Agency
Maintained byCounty Highway 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 E Milo Road over Harrison Canal built?

It was built in 1949, making it 76 years old in 2025. It was reconstructed in 1961.

What condition is E Milo Road over Harrison 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 November 2023.

How much traffic does E Milo Road over Harrison Canal carry?

About 520 vehicles per day (2023 count), of which roughly 13% are trucks.

How long is E Milo Road over Harrison Canal?

The structure is 32 ft (9.8 m) long with a longest span of 16 ft (4.9 m) and a deck 30 ft wide.

Who owns E Milo Road over Harrison Canal?

It is owned by the County Highway Agency.