US Bridges

Na Cnty RD 316 over Casper Canal

Good

Natrona County, Wyoming · 20 Miles SW of Casper · Structure no. LEA

Built
2003
22 years old
Condition
Good
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
63 ft
1 main span
Daily traffic
6
2024 count
Owner
County
County Highway Agency

About this bridge

Na Cnty RD 316 over Casper Canal is a steel stringer/multi-beam or girder carrying Na Cnty RD 316 over Casper Canal in Natrona County, Wyoming. It was built in 2003, so it is 22 years old, younger than the Wyoming average of 48.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 6 vehicles a day, projected to reach 8 by 2043. The structure is 63 ft (19.2 m) long and 15 ft wide. If it were closed, the detour would be 29.8 mi (48 km).

Location

Open in Google Maps
CarriesNa Cnty RD 316
CrossesCasper Canal
Location20 Miles SW of Casper
RouteCounty Highway 316
CountyNatrona County
StateWyoming
Coordinates42.70039, -106.64158
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating57 US tons
Inventory rating34 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadUnknown
Structure length63 ft (19.2 m)
Longest span62 ft (18.9 m)
Deck width15 ft (4.7 m)
Roadway width15 ft (4.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6 (2024)
Projected traffic8 by 2043
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed29.8 mi (48 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$45,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Na Cnty RD 316 over Casper Canal built?

It was built in 2003, making it 22 years old in 2025.

What condition is Na Cnty RD 316 over Casper Canal in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in August 2023.

How much traffic does Na Cnty RD 316 over Casper Canal carry?

About 6 vehicles per day (2024 count).

How long is Na Cnty RD 316 over Casper Canal?

The structure is 63 ft (19.2 m) long with a longest span of 62 ft (18.9 m) and a deck 15 ft wide.

Who owns Na Cnty RD 316 over Casper Canal?

It is owned by the County Highway Agency.