US Bridges

Na Cnty RD 209 over M Casper Creek

FairPosted for load

Natrona County, Wyoming · 0.30 Miles S. of Natrona · Structure no. DUM

Built
1970
55 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
35 ft
1 main span
Daily traffic
23
2024 count
Owner
County
County Highway Agency

About this bridge

Na Cnty RD 209 over M Casper Creek is a steel stringer/multi-beam or girder carrying Na Cnty RD 209 over M Casper Creek in Natrona County, Wyoming. It was built in 1970, so it is 55 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 5 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 23 vehicles a day, roughly 9% of them trucks, projected to reach 32 by 2043. The structure is 35 ft (10.7 m) long and 14 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesNa Cnty RD 209
CrossesM Casper Creek
Location0.30 Miles S. of Natrona
RouteCounty Highway 209
CountyNatrona County
StateWyoming
Coordinates43.02463, -106.80902
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionAugust 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating37.1 US tons
Inventory rating22.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckWood or timber
Main spans1
Design loadUnknown
Structure length35 ft (10.7 m)
Longest span34 ft (10.4 m)
Deck width14 ft (4.3 m)
Roadway width13 ft (4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic23 (2024)
Projected traffic32 by 2043
Trucks9%
Lanes on structure1
Traffic directionOne-lane bridge for two-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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$244,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Na Cnty RD 209 over M Casper Creek built?

It was built in 1970, making it 55 years old in 2025.

What condition is Na Cnty RD 209 over M Casper Creek 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 August 2024.

How much traffic does Na Cnty RD 209 over M Casper Creek carry?

About 23 vehicles per day (2024 count), of which roughly 9% are trucks.

How long is Na Cnty RD 209 over M Casper Creek?

The structure is 35 ft (10.7 m) long with a longest span of 34 ft (10.4 m) and a deck 14 ft wide.

Who owns Na Cnty RD 209 over M Casper Creek?

It is owned by the County Highway Agency.