US Bridges

I-70 over Flat Canyon Drainage Ch.

Fair

Sevier County, Utah · 4.4 Mi.No.Elsinore Intchg · Structure no. 0E2303

Built
1986
39 years old
Condition
Fair
inspected May 2023
Type
Culvert
Concrete Continuous
Length
60 ft
2 main spans
Daily traffic
6,705
2017 count
Owner
State
State Highway Agency

About this bridge

I-70 over Flat Canyon Drainage Ch. is a concrete continuous culvert carrying I-70 over Flat Canyon Drainage Ch. in Sevier County, Utah. It was built in 1986, so it is 39 years old, younger 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 6,705 vehicles a day, roughly 26% of them trucks, projected to reach 8,046 by 2037. The structure is 60 ft (18.3 m) long. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesI-70
CrossesFlat Canyon Drainage Ch.
Location4.4 Mi.No.Elsinore Intchg
RouteInterstate 70
CountySevier County
StateUtah
Coordinates38.71944, -112.13278
Functional classRural Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20 + Mod
Structure length60 ft (18.3 m)
Longest span27 ft (8.3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,705 (2017)
Projected traffic8,046 by 2037
Trucks26%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 I-70 over Flat Canyon Drainage Ch. built?

It was built in 1986, making it 39 years old in 2025.

What condition is I-70 over Flat Canyon Drainage Ch. 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 May 2023.

How much traffic does I-70 over Flat Canyon Drainage Ch. carry?

About 6,705 vehicles per day (2017 count), of which roughly 26% are trucks.

How long is I-70 over Flat Canyon Drainage Ch.?

The structure is 60 ft (18.3 m) long with a longest span of 27 ft (8.3 m).

Who owns I-70 over Flat Canyon Drainage Ch.?

It is owned by the State Highway Agency.