US Bridges

Jo Cnty RD 11A over Rock Creek

GoodPosted for load

Johnson County, Wyoming · 6 MI NW of Buffalo · Structure no. MTI

Built
2013
12 years old
Condition
Good
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
70 ft
1 main span
Daily traffic
71
2024 count
Owner
County
County Highway Agency

About this bridge

Jo Cnty RD 11A over Rock Creek is a steel stringer/multi-beam or girder carrying Jo Cnty RD 11A over Rock Creek in Johnson County, Wyoming. It was built in 2013, so it is 12 years old, younger than the Wyoming average of 48.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. Its operating status is: posted for load restriction.

It carries about 71 vehicles a day, roughly 1% of them trucks, projected to reach 99 by 2043. The structure is 70 ft (21.3 m) long and 22 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

CarriesJo Cnty RD 11A
CrossesRock Creek
Location6 MI NW of Buffalo
RouteCounty Highway 11a
StateWyoming
Coordinates44.42398, -106.78008
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating34.6 US tons
Inventory rating26.8 US tons

Structure

MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHL 93
Structure length70 ft (21.3 m)
Longest span70 ft (21.3 m)
Deck width22 ft (6.7 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic71 (2024)
Projected traffic99 by 2043
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Jo Cnty RD 11A over Rock Creek built?

It was built in 2013, making it 12 years old in 2025.

What condition is Jo Cnty RD 11A over Rock Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in March 2023.

How much traffic does Jo Cnty RD 11A over Rock Creek carry?

About 71 vehicles per day (2024 count), of which roughly 1% are trucks.

How long is Jo Cnty RD 11A over Rock Creek?

The structure is 70 ft (21.3 m) long with a longest span of 70 ft (21.3 m) and a deck 22 ft wide.

Who owns Jo Cnty RD 11A over Rock Creek?

It is owned by the County Highway Agency.