US Bridges

Sma 7166;1st ST over Sand Creek

Fair

Bonneville County, Idaho · Ammon · Structure no. 000000000021345

Built
1957
68 years old
Condition
Fair
inspected March 2024
Type
Tee Beam
Prestressed Concrete
Length
70 ft
3 main spans
Daily traffic
14,500
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Sma 7166;1st ST over Sand Creek is a prestressed concrete tee beam carrying Sma 7166;1st ST over Sand Creek in Bonneville County, Idaho. It was built in 1957, so it is 68 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 14,500 vehicles a day, roughly 1% of them trucks, projected to reach 21,750 by 2042. The structure is 70 ft (21.3 m) long and 31 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesSma 7166;1st ST
CrossesSand Creek
LocationAmmon
RouteCity Street 7166
CountyBonneville County
StateIdaho
Coordinates43.49644, -111.98289
Functional classUrban 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.
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 inspectionMarch 2024
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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating38 US tons
Inventory rating23 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length70 ft (21.3 m)
Longest span30 ft (9.1 m)
Deck width31 ft (9.3 m)
Roadway width29 ft (8.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,500 (2023)
Projected traffic21,750 by 2042
Trucks1%
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

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.1 million (2018 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Sma 7166;1st ST over Sand Creek built?

It was built in 1957, making it 68 years old in 2025.

What condition is Sma 7166;1st ST over Sand Creek 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 2024.

How much traffic does Sma 7166;1st ST over Sand Creek carry?

About 14,500 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is Sma 7166;1st ST over Sand Creek?

The structure is 70 ft (21.3 m) long with a longest span of 30 ft (9.1 m) and a deck 31 ft wide.

Who owns Sma 7166;1st ST over Sand Creek?

It is owned by the City or Municipal Highway Agency.