US Bridges

Co.Rd. Neilson Ave over Big Cottonwood Creek

Fair

Salt Lake County, Utah · Silverfork Subd.N.Solitud · Structure no. 035136C

Built
1950
75 years old, rebuilt 1993
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
21 ft
1 main span
Daily traffic
63
2010 count
Owner
County
County Highway Agency

About this bridge

Co.Rd. Neilson Ave over Big Cottonwood Creek is a steel stringer/multi-beam or girder carrying Co.Rd. Neilson Ave over Big Cottonwood Creek in Salt Lake County, Utah. It was built in 1950 and reconstructed in 1993, so it is 75 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 63 vehicles a day, projected to reach 77 by 2030. The structure is 21 ft (6.4 m) long and 15 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesCo.Rd. Neilson Ave
CrossesBig Cottonwood Creek
LocationSilverfork Subd.N.Solitud
RouteCounty Highway 0
CountySalt Lake County
StateUtah
Coordinates40.63025, -111.60883
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
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 alignment6: Equal to present minimum criteria
Operating rating46.4 US tons
Inventory rating32.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length21 ft (6.4 m)
Longest span21 ft (6.3 m)
Deck width15 ft (4.5 m)
Roadway width13 ft (4 m)
Vertical clearance over deck99 ft (30.2 m)

Traffic and service

Average daily traffic63 (2010)
Projected traffic77 by 2030
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Co.Rd. Neilson Ave over Big Cottonwood Creek built?

It was built in 1950, making it 75 years old in 2025. It was reconstructed in 1993.

What condition is Co.Rd. Neilson Ave over Big Cottonwood Creek 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 June 2024.

How much traffic does Co.Rd. Neilson Ave over Big Cottonwood Creek carry?

About 63 vehicles per day (2010 count).

How long is Co.Rd. Neilson Ave over Big Cottonwood Creek?

The structure is 21 ft (6.4 m) long with a longest span of 21 ft (6.3 m) and a deck 15 ft wide.

Who owns Co.Rd. Neilson Ave over Big Cottonwood Creek?

It is owned by the County Highway Agency.