US Bridges

CR Cnty RD 129 over I-90

Poor

Crook County, Wyoming · Sundance - S Dakota Line · Structure no. DHR

Built
1977
48 years old
Condition
Poor
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
261 ft
2 main spans
Daily traffic
133
2024 count
Owner
State
State Highway Agency

About this bridge

CR Cnty RD 129 over I-90 is a steel continuous stringer/multi-beam or girder carrying CR Cnty RD 129 over I-90 in Crook County, Wyoming. It was built in 1977, so it is 48 years old, younger 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 133 vehicles a day, roughly 49% of them trucks, projected to reach 186 by 2043. The structure is 261 ft (79.6 m) long and 35 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesCR Cnty RD 129
CrossesI-90
LocationSundance - S Dakota Line
RouteCounty Highway 129
CountyCrook County
StateWyoming
Coordinates44.54329, -104.08106
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
Deck7 GoodSome minor problems.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53.6 US tons
Inventory rating32 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length261 ft (79.6 m)
Longest span128 ft (39 m)
Deck width35 ft (10.6 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic133 (2024)
Projected traffic186 by 2043
Trucks49%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was CR Cnty RD 129 over I-90 built?

It was built in 1977, making it 48 years old in 2025.

What condition is CR Cnty RD 129 over I-90 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 CR Cnty RD 129 over I-90 carry?

About 133 vehicles per day (2024 count), of which roughly 49% are trucks.

How long is CR Cnty RD 129 over I-90?

The structure is 261 ft (79.6 m) long with a longest span of 128 ft (39 m) and a deck 35 ft wide.

Who owns CR Cnty RD 129 over I-90?

It is owned by the State Highway Agency.