US Bridges

Jo Cnty RD 85 over Rock Creek

Poor

Johnson County, Wyoming · 11 Mi. N.W. of Buffalo · Structure no. EDI

Built
1976
49 years old
Condition
Poor
inspected March 2024
Type
Culvert
Steel
Length
49 ft
3 main spans
Daily traffic
56
2024 count
Owner
County
County Highway Agency

About this bridge

Jo Cnty RD 85 over Rock Creek is a steel culvert carrying Jo Cnty RD 85 over Rock Creek in Johnson County, Wyoming. It was built in 1976, so it is 49 years old, older than the Wyoming average of 48.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 56 vehicles a day, projected to reach 78 by 2043. The structure is 49 ft (14.8 m) long. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesJo Cnty RD 85
CrossesRock Creek
Location11 Mi. N.W. of Buffalo
RouteCounty Highway 85
CountyJohnson County
StateWyoming
Coordinates44.43588, -106.83024
Functional classRural Minor Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating44.6 US tons
Inventory rating34.2 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans3
Design loadUnknown
Structure length49 ft (14.8 m)
Longest span11 ft (3.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic56 (2024)
Projected traffic78 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$45,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Jo Cnty RD 85 over Rock Creek built?

It was built in 1976, making it 49 years old in 2025.

What condition is Jo Cnty RD 85 over Rock Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in March 2024.

How much traffic does Jo Cnty RD 85 over Rock Creek carry?

About 56 vehicles per day (2024 count).

How long is Jo Cnty RD 85 over Rock Creek?

The structure is 49 ft (14.8 m) long with a longest span of 11 ft (3.4 m).

Who owns Jo Cnty RD 85 over Rock Creek?

It is owned by the County Highway Agency.