US Bridges

Knolls Int.X-Rd. over I-80 (SR-80) Ebl

Fair

Tooele County, Utah · Knolls Interchange · Structure no. 0F 219A

Built
1970
55 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
167 ft
3 main spans
Daily traffic
80
2012 count
Owner
State
State Highway Agency

About this bridge

Knolls Int.X-Rd. over I-80 (SR-80) Ebl is a prestressed concrete stringer/multi-beam or girder carrying Knolls Int.X-Rd. over I-80 (SR-80) Ebl in Tooele County, Utah. It was built in 1970, so it is 55 years old, older than the Utah average of 40.1 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 80 vehicles a day, roughly 58% of them trucks, projected to reach 100 by 2032. The structure is 167 ft (50.9 m) long and 32 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

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CarriesKnolls Int.X-Rd.
CrossesI-80 (SR-80) Ebl
LocationKnolls Interchange
RouteCounty Highway 0
CountyTooele County
StateUtah
Coordinates40.72647, -113.25872
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50 US tons
Inventory rating28.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length167 ft (50.9 m)
Longest span87 ft (26.5 m)
Deck width32 ft (9.7 m)
Roadway width30 ft (9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic80 (2012)
Projected traffic100 by 2032
Trucks58%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Knolls Int.X-Rd. over I-80 (SR-80) Ebl built?

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

What condition is Knolls Int.X-Rd. over I-80 (SR-80) Ebl 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 September 2024.

How much traffic does Knolls Int.X-Rd. over I-80 (SR-80) Ebl carry?

About 80 vehicles per day (2012 count), of which roughly 58% are trucks.

How long is Knolls Int.X-Rd. over I-80 (SR-80) Ebl?

The structure is 167 ft (50.9 m) long with a longest span of 87 ft (26.5 m) and a deck 32 ft wide.

Who owns Knolls Int.X-Rd. over I-80 (SR-80) Ebl?

It is owned by the State Highway Agency.