US Bridges

US 20/26/87 Ebl over Elkhorn Creek

Good

Natrona County, Wyoming · East Yellowstone - Casper · Structure no. CON

Built
1957
68 years old
Condition
Good
inspected June 2024
Type
Slab
Concrete Continuous
Length
81 ft
4 main spans
Daily traffic
3,053
2024 count
Owner
State
State Highway Agency

About this bridge

US 20/26/87 Ebl over Elkhorn Creek is a concrete continuous slab carrying US 20/26/87 Ebl over Elkhorn Creek in Natrona County, Wyoming. It was built in 1957, so it is 68 years old, older 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 3,053 vehicles a day, roughly 19% of them trucks, projected to reach 4,274 by 2043. The structure is 81 ft (24.7 m) long and 33 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesUS 20/26/87 Ebl
CrossesElkhorn Creek
LocationEast Yellowstone - Casper
RouteU.S. Route 20
StateWyoming
Coordinates42.85519, -106.2399
Functional classUrban Other Principal Arterial

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 protection7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40.7 US tons
Inventory rating24.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length81 ft (24.7 m)
Longest span22 ft (6.6 m)
Deck width33 ft (10.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,053 (2024)
Projected traffic4,274 by 2043
Trucks19%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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—
NavigationNo navigation control on waterway

Frequently asked questions

When was US 20/26/87 Ebl over Elkhorn Creek built?

It was built in 1957, making it 68 years old in 2025.

What condition is US 20/26/87 Ebl over Elkhorn Creek 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 June 2024.

How much traffic does US 20/26/87 Ebl over Elkhorn Creek carry?

About 3,053 vehicles per day (2024 count), of which roughly 19% are trucks.

How long is US 20/26/87 Ebl over Elkhorn Creek?

The structure is 81 ft (24.7 m) long with a longest span of 22 ft (6.6 m) and a deck 33 ft wide.

Who owns US 20/26/87 Ebl over Elkhorn Creek?

It is owned by the State Highway Agency.