US Bridges

County Road 17.5 over Trib. Big Salt Wash

Fair

Mesa County, Colorado · .3 MI S of RD L.50 · Structure no. MESA-17.5-L.6

Built
1988
37 years old
Condition
Fair
inspected January 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
22 ft
1 main span
Daily traffic
1,045
2022 count
Owner
County
County Highway Agency

About this bridge

County Road 17.5 over Trib. Big Salt Wash is a steel stringer/multi-beam or girder carrying County Road 17.5 over Trib. Big Salt Wash in Mesa County, Colorado. It was built in 1988, so it is 37 years old, younger than the Colorado average of 42.2 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 1,045 vehicles a day, roughly 2% of them trucks, projected to reach 1,222 by 2042. The structure is 22 ft (6.8 m) long and 32 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesCounty Road 17.5
CrossesTrib. Big Salt Wash
Location.3 MI S of RD L.50
RouteCounty Highway 0
CountyMesa County
StateColorado
Coordinates39.18744, -108.72914
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36.7 US tons
Inventory rating22 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHS 20
Structure length22 ft (6.8 m)
Longest span20 ft (6.2 m)
Deck width32 ft (9.8 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,045 (2022)
Projected traffic1,222 by 2042
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was County Road 17.5 over Trib. Big Salt Wash built?

It was built in 1988, making it 37 years old in 2025.

What condition is County Road 17.5 over Trib. Big Salt 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 January 2024.

How much traffic does County Road 17.5 over Trib. Big Salt Wash carry?

About 1,045 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is County Road 17.5 over Trib. Big Salt Wash?

The structure is 22 ft (6.8 m) long with a longest span of 20 ft (6.2 m) and a deck 32 ft wide.

Who owns County Road 17.5 over Trib. Big Salt Wash?

It is owned by the County Highway Agency.