US Bridges

SR-128 over IDA'S Gulch

Fair

Grand County, Utah · 18.7 Miles North of Moab · Structure no. 0A 421

Built
1970
55 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
26 ft
1 main span
Daily traffic
364
2017 count
Owner
State
State Highway Agency

About this bridge

SR-128 over IDA'S Gulch is a steel stringer/multi-beam or girder carrying SR-128 over IDA'S Gulch in Grand 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 5 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 26 ft (7.9 m) long and 28 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

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CarriesSR-128
CrossesIDA'S Gulch
Location18.7 Miles North of Moab
RouteState Highway 128
CountyGrand County
StateUtah
Coordinates38.69266, -109.40986
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating62.2 US tons
Inventory rating46.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHS 20 + Mod
Structure length26 ft (7.9 m)
Longest span25 ft (7.7 m)
Deck width28 ft (8.4 m)
Roadway width26 ft (7.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic364 (2017)
Projected traffic437 by 2037
Trucks25%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
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 SR-128 over IDA'S Gulch built?

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

What condition is SR-128 over IDA'S Gulch 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 over IDA'S Gulch carry?

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

How long is SR-128 over IDA'S Gulch?

The structure is 26 ft (7.9 m) long with a longest span of 25 ft (7.7 m) and a deck 28 ft wide.

Who owns SR-128 over IDA'S Gulch?

It is owned by the State Highway Agency.