US Bridges

SR-128 over Grandstaff Canyon Wash

Fair

Grand County, Utah · 5.1 Miles North of Moab · Structure no. 0D 580

Built
1956
69 years old
Condition
Fair
inspected September 2023
Type
Culvert
Concrete
Length
32 ft
1 main span
Daily traffic
1,120
2022 count
Owner
State
State Highway Agency

About this bridge

SR-128 over Grandstaff Canyon Wash is a concrete culvert carrying SR-128 over Grandstaff Canyon Wash in Grand County, Utah. It was built in 1956, so it is 69 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 1,120 vehicles a day, roughly 25% of them trucks, projected to reach 1,344 by 2042. The structure is 32 ft (9.8 m) long. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesSR-128
CrossesGrandstaff Canyon Wash
Location5.1 Miles North of Moab
RouteState Highway 128
CountyGrand County
StateUtah
Coordinates38.60992, -109.53439
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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 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 rating107.1 US tons
Inventory rating106.5 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length32 ft (9.8 m)
Longest span30 ft (9.1 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,120 (2022)
Projected traffic1,344 by 2042
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 statusEligible 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 Grandstaff Canyon Wash built?

It was built in 1956, making it 69 years old in 2025.

What condition is SR-128 over Grandstaff Canyon Wash 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 Grandstaff Canyon Wash carry?

About 1,120 vehicles per day (2022 count), of which roughly 25% are trucks.

How long is SR-128 over Grandstaff Canyon Wash?

The structure is 32 ft (9.8 m) long with a longest span of 30 ft (9.1 m).

Who owns SR-128 over Grandstaff Canyon Wash?

It is owned by the State Highway Agency.