US Bridges

Sma 8683;BLACK Cat over Five Mile Creek

Fair

Ada County, Idaho · 2.1 N. 3.1 W. Meridian · Structure no. 000000000025990

Built
1930
95 years old, rebuilt 1967
Condition
Fair
inspected November 2023
Type
Tee Beam
Prestressed Concrete
Length
29 ft
1 main span
Daily traffic
6,100
2023 count
Owner
County
County Highway Agency

About this bridge

Sma 8683;BLACK Cat over Five Mile Creek is a prestressed concrete tee beam carrying Sma 8683;BLACK Cat over Five Mile Creek in Ada County, Idaho. It was built in 1930 and reconstructed in 1967, so it is 95 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 6,100 vehicles a day, roughly 3% of them trucks, projected to reach 9,150 by 2042. The structure is 29 ft (8.8 m) long and 28 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesSma 8683;BLACK Cat
CrossesFive Mile Creek
Location2.1 N. 3.1 W. Meridian
RouteCounty Highway 8683
StateIdaho
Coordinates43.64247, -116.45358
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
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 rating49.6 US tons
Inventory rating36.7 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length29 ft (8.8 m)
Longest span28 ft (8.5 m)
Deck width28 ft (8.5 m)
Roadway width26 ft (8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,100 (2023)
Projected traffic9,150 by 2042
Trucks3%
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$475,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Sma 8683;BLACK Cat over Five Mile Creek built?

It was built in 1930, making it 95 years old in 2025. It was reconstructed in 1967.

What condition is Sma 8683;BLACK Cat over Five Mile 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 November 2023.

How much traffic does Sma 8683;BLACK Cat over Five Mile Creek carry?

About 6,100 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Sma 8683;BLACK Cat over Five Mile Creek?

The structure is 29 ft (8.8 m) long with a longest span of 28 ft (8.5 m) and a deck 28 ft wide.

Who owns Sma 8683;BLACK Cat over Five Mile Creek?

It is owned by the County Highway Agency.