US Bridges

County Road 31.5 over Grand Valley Canal

Fair

Mesa County, Colorado · .2 MI N of RD E · Structure no. MESA-31.5-E.2A

Built
2001
24 years old
Condition
Fair
inspected February 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
43 ft
1 main span
Daily traffic
3,072
2022 count
Owner
County
County Highway Agency

About this bridge

County Road 31.5 over Grand Valley Canal is a steel stringer/multi-beam or girder carrying County Road 31.5 over Grand Valley Canal 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 3,072 vehicles a day, roughly 5% of them trucks, projected to reach 3,594 by 2042. The structure is 43 ft (13.1 m) long and 60 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesCounty Road 31.5
CrossesGrand Valley Canal
Location.2 MI N of RD E
RouteCounty Highway 0
Coordinates39.07886, -108.46872
Functional classUrban 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
Deck8 Very GoodNo problems noted.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating56.5 US tons
Inventory rating33.8 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length43 ft (13.1 m)
Longest span39 ft (11.9 m)
Deck width60 ft (18.3 m)
Roadway width48 ft (14.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,072 (2022)
Projected traffic3,594 by 2042
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
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 31.5 over Grand Valley Canal built?

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

What condition is County Road 31.5 over Grand Valley Canal 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 February 2024.

How much traffic does County Road 31.5 over Grand Valley Canal carry?

About 3,072 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is County Road 31.5 over Grand Valley Canal?

The structure is 43 ft (13.1 m) long with a longest span of 39 ft (11.9 m) and a deck 60 ft wide.

Who owns County Road 31.5 over Grand Valley Canal?

It is owned by the County Highway Agency.