US Bridges

Cb Cnty RD 97 over Little Medicine Bow Rvr

FairPosted for load

Carbon County, Wyoming · T28N R077W S30 · Structure no. DNB

Built
1950
75 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
32 ft
1 main span
Daily traffic
24
2024 count
Owner
County
County Highway Agency

About this bridge

Cb Cnty RD 97 over Little Medicine Bow Rvr is a steel stringer/multi-beam or girder carrying Cb Cnty RD 97 over Little Medicine Bow Rvr in Carbon County, Wyoming. It was built in 1950, so it is 75 years old, older than the Wyoming average of 48.4 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. Its operating status is: posted for load restriction.

It carries about 24 vehicles a day, roughly 8% of them trucks, projected to reach 34 by 2043. The structure is 32 ft (9.8 m) long and 18 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesCb Cnty RD 97
CrossesLittle Medicine Bow Rvr
LocationT28N R077W S30
RouteCounty Highway 97
CountyCarbon County
StateWyoming
Coordinates42.36943, -106.10522
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating10.8 US tons
Inventory rating6.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadUnknown
Structure length32 ft (9.8 m)
Longest span32 ft (9.7 m)
Deck width18 ft (5.5 m)
Roadway width18 ft (5.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic24 (2024)
Projected traffic34 by 2043
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$43,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Cb Cnty RD 97 over Little Medicine Bow Rvr built?

It was built in 1950, making it 75 years old in 2025.

What condition is Cb Cnty RD 97 over Little Medicine Bow Rvr 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 May 2024.

How much traffic does Cb Cnty RD 97 over Little Medicine Bow Rvr carry?

About 24 vehicles per day (2024 count), of which roughly 8% are trucks.

How long is Cb Cnty RD 97 over Little Medicine Bow Rvr?

The structure is 32 ft (9.8 m) long with a longest span of 32 ft (9.7 m) and a deck 18 ft wide.

Who owns Cb Cnty RD 97 over Little Medicine Bow Rvr?

It is owned by the County Highway Agency.