US Bridges

FR Cnty RD 20 over M F Popo Agie Overflow

Fair

Fremont County, Wyoming · 0.5 Mi. S. of Lander · Structure no. DJL

Built
1978
47 years old
Condition
Fair
inspected March 2023
Type
Tee Beam
Prestressed Concrete
Length
36 ft
1 main span
Daily traffic
427
2024 count
Owner
County
County Highway Agency

About this bridge

FR Cnty RD 20 over M F Popo Agie Overflow is a prestressed concrete tee beam carrying FR Cnty RD 20 over M F Popo Agie Overflow in Fremont County, Wyoming. It was built in 1978, so it is 47 years old, younger 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.

It carries about 427 vehicles a day, roughly 2% of them trucks, projected to reach 598 by 2043. The structure is 36 ft (11 m) long and 32 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesFR Cnty RD 20
CrossesM F Popo Agie Overflow
Location0.5 Mi. S. of Lander
RouteCounty Highway 20
StateWyoming
Coordinates42.80994, -108.74405
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no 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 alignment6: Equal to present minimum criteria
Operating rating60.1 US tons
Inventory rating36 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length36 ft (11 m)
Longest span34 ft (10.4 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic427 (2024)
Projected traffic598 by 2043
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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$33,000
NavigationNo navigation control on waterway

Frequently asked questions

When was FR Cnty RD 20 over M F Popo Agie Overflow built?

It was built in 1978, making it 47 years old in 2025.

What condition is FR Cnty RD 20 over M F Popo Agie Overflow 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 March 2023.

How much traffic does FR Cnty RD 20 over M F Popo Agie Overflow carry?

About 427 vehicles per day (2024 count), of which roughly 2% are trucks.

How long is FR Cnty RD 20 over M F Popo Agie Overflow?

The structure is 36 ft (11 m) long with a longest span of 34 ft (10.4 m) and a deck 32 ft wide.

Who owns FR Cnty RD 20 over M F Popo Agie Overflow?

It is owned by the County Highway Agency.