US Bridges

6166C over Bald Mountain Creek

Fair

Pittsburg County, Oklahoma · 4.2 MI E of Ulan · Structure no. 200920000000000

Built
1982
43 years old
Condition
Fair
inspected August 2023
Type
Culvert
Concrete
Length
32 ft
3 main spans
Daily traffic
100
2022 count
Owner
County
County Highway Agency

About this bridge

6166C over Bald Mountain Creek is a concrete culvert carrying 6166C over Bald Mountain Creek in Pittsburg County, Oklahoma. It was built in 1982, so it is 43 years old, younger than the Oklahoma average of 47.8 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 100 vehicles a day, roughly 15% of them trucks, projected to reach 160 by 2042. The structure is 32 ft (9.8 m) long and 27 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
Carries6166C
CrossesBald Mountain Creek
Location4.2 MI E of Ulan
RouteCounty Highway 6166C
CountyPittsburg County
StateOklahoma
Coordinates35.11606, -95.81188
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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating21.1 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20
Structure length32 ft (9.8 m)
Longest span10 ft (3 m)
Deck width27 ft (8.2 m)
Roadway width25 ft (7.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2022)
Projected traffic160 by 2042
Trucks15%
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 statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$225,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 6166C over Bald Mountain Creek built?

It was built in 1982, making it 43 years old in 2025.

What condition is 6166C over Bald Mountain 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 August 2023.

How much traffic does 6166C over Bald Mountain Creek carry?

About 100 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is 6166C over Bald Mountain Creek?

The structure is 32 ft (9.8 m) long with a longest span of 10 ft (3 m) and a deck 27 ft wide.

Who owns 6166C over Bald Mountain Creek?

It is owned by the County Highway Agency.