US Bridges

STC6805;A-2 Clk CO over Dry Creek

Fair

Clark County, Idaho · 4 N. 7 E. Kilgore · Structure no. 000000000021090

Built
1969
56 years old
Condition
Fair
inspected July 2024
Type
Tee Beam
Prestressed Concrete
Length
28 ft
1 main span
Daily traffic
160
2023 count
Owner
County
County Highway Agency

About this bridge

STC6805;A-2 Clk CO over Dry Creek is a prestressed concrete tee beam carrying STC6805;A-2 Clk CO over Dry Creek in Clark County, Idaho. It was built in 1969, so it is 56 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 160 vehicles a day, roughly 7% of them trucks, projected to reach 240 by 2042. The structure is 28 ft (8.5 m) long and 30 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

CarriesSTC6805;A-2 Clk CO
CrossesDry Creek
Location4 N. 7 E. Kilgore
RouteCounty Highway 6805
StateIdaho
Coordinates44.45789, -111.75433
Functional classRural Major Collector

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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52 US tons
Inventory rating31 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length28 ft (8.5 m)
Longest span27 ft (8.2 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic160 (2023)
Projected traffic240 by 2042
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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$365,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was STC6805;A-2 Clk CO over Dry Creek built?

It was built in 1969, making it 56 years old in 2025.

What condition is STC6805;A-2 Clk CO over Dry 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 July 2024.

How much traffic does STC6805;A-2 Clk CO over Dry Creek carry?

About 160 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is STC6805;A-2 Clk CO over Dry Creek?

The structure is 28 ft (8.5 m) long with a longest span of 27 ft (8.2 m) and a deck 30 ft wide.

Who owns STC6805;A-2 Clk CO over Dry Creek?

It is owned by the County Highway Agency.