US Bridges

Na Cnty RD 110 over South Fork Powder River

PoorPosted for load

Natrona County, Wyoming · 44 Miles N.W. of Casper · Structure no. DDK

Built
1977
48 years old
Condition
Poor
inspected August 2024
Type
Tee Beam
Prestressed Concrete
Length
212 ft
6 main spans
Daily traffic
53
2024 count
Owner
County
County Highway Agency

About this bridge

Na Cnty RD 110 over South Fork Powder River is a prestressed concrete tee beam carrying Na Cnty RD 110 over South Fork Powder River in Natrona 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. Its operating status is: posted for load restriction.

It carries about 53 vehicles a day, roughly 11% of them trucks, projected to reach 74 by 2043. The structure is 212 ft (64.6 m) long and 26 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

CarriesNa Cnty RD 110
CrossesSouth Fork Powder River
Location44 Miles N.W. of Casper
RouteCounty Highway 110
StateWyoming
Coordinates43.3268, -106.68064
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
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating49.1 US tons
Inventory rating32 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans6
Design loadHS 20
Structure length212 ft (64.6 m)
Longest span34 ft (10.4 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic53 (2024)
Projected traffic74 by 2043
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 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$82,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Na Cnty RD 110 over South Fork Powder River built?

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

What condition is Na Cnty RD 110 over South Fork Powder River 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 August 2024.

How much traffic does Na Cnty RD 110 over South Fork Powder River carry?

About 53 vehicles per day (2024 count), of which roughly 11% are trucks.

How long is Na Cnty RD 110 over South Fork Powder River?

The structure is 212 ft (64.6 m) long with a longest span of 34 ft (10.4 m) and a deck 26 ft wide.

Who owns Na Cnty RD 110 over South Fork Powder River?

It is owned by the County Highway Agency.