US Bridges

County Road M.80 over Mack Wash

Fair

Mesa County, Colorado · .4 MI W of CR 10.0 · Structure no. MESA-O.4-9.6A

Built
2001
24 years old
Condition
Fair
inspected January 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
97 ft
1 main span
Daily traffic
817
2022 count
Owner
County
County Highway Agency

About this bridge

County Road M.80 over Mack Wash is a prestressed concrete stringer/multi-beam or girder carrying County Road M.80 over Mack Wash in Mesa County, Colorado. It was built in 2001, so it is 24 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 817 vehicles a day, roughly 2% of them trucks, projected to reach 956 by 2042. The structure is 97 ft (29.7 m) long and 37 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesCounty Road M.80
CrossesMack Wash
Location.4 MI W of CR 10.0
RouteCounty Highway 0
CountyMesa County
StateColorado
Coordinates39.22911, -108.87561
Functional classRural Minor 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating97.6 US tons
Inventory rating58.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length97 ft (29.7 m)
Longest span93 ft (28.2 m)
Deck width37 ft (11.3 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic817 (2022)
Projected traffic956 by 2042
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 M.80 over Mack Wash built?

It was built in 2001, making it 24 years old in 2025.

What condition is County Road M.80 over Mack 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 M.80 over Mack Wash carry?

About 817 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is County Road M.80 over Mack Wash?

The structure is 97 ft (29.7 m) long with a longest span of 93 ft (28.2 m) and a deck 37 ft wide.

Who owns County Road M.80 over Mack Wash?

It is owned by the County Highway Agency.