US Bridges

SR-128 Int.X-Road. over I-70 (SR-70)

Fair

Grand County, Utah · West Cisco Interchange · Structure no. 0F 269

Built
1968
57 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
286 ft
4 main spans
Daily traffic
364
2017 count
Owner
State
State Highway Agency

About this bridge

SR-128 Int.X-Road. over I-70 (SR-70) is a prestressed concrete stringer/multi-beam or girder carrying SR-128 Int.X-Road. over I-70 (SR-70) in Grand County, Utah. It was built in 1968, so it is 57 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 364 vehicles a day, roughly 25% of them trucks, projected to reach 437 by 2037. The structure is 286 ft (87.3 m) long and 32 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

Location

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CarriesSR-128 Int.X-Road.
CrossesI-70 (SR-70)
LocationWest Cisco Interchange
RouteState Highway 128
CountyGrand County
StateUtah
Coordinates38.93805, -109.40737
Functional classRural Major Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating51.8 US tons
Inventory rating20 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length286 ft (87.3 m)
Longest span105 ft (32 m)
Deck width32 ft (9.7 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic364 (2017)
Projected traffic437 by 2037
Trucks25%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed19.9 mi (32 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 SR-128 Int.X-Road. over I-70 (SR-70) built?

It was built in 1968, making it 57 years old in 2025.

What condition is SR-128 Int.X-Road. over I-70 (SR-70) 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 2023.

How much traffic does SR-128 Int.X-Road. over I-70 (SR-70) carry?

About 364 vehicles per day (2017 count), of which roughly 25% are trucks.

How long is SR-128 Int.X-Road. over I-70 (SR-70)?

The structure is 286 ft (87.3 m) long with a longest span of 105 ft (32 m) and a deck 32 ft wide.

Who owns SR-128 Int.X-Road. over I-70 (SR-70)?

It is owned by the State Highway Agency.