US Bridges

County Road 56.5 over Plateau Creek

Fair

Mesa County, Colorado · Just N of RD 330 · Structure no. MESA-56.5-O.7A

Built
1984
41 years old
Condition
Fair
inspected January 2024
Type
Tee Beam
Prestressed Concrete
Length
53 ft
1 main span
Daily traffic
15
2022 count
Owner
County
County Highway Agency

About this bridge

County Road 56.5 over Plateau Creek is a prestressed concrete tee beam carrying County Road 56.5 over Plateau Creek in Mesa County, Colorado. It was built in 1984, so it is 41 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 15 vehicles a day, projected to reach 17 by 2042. The structure is 53 ft (16.1 m) long and 18 ft wide. If it were closed, the detour would be 100 mi (161 km).

Location

Open in Google Maps
CarriesCounty Road 56.5
CrossesPlateau Creek
LocationJust N of RD 330
RouteCounty Highway 0
CountyMesa County
StateColorado
Coordinates39.23161, -108.00561
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure8 Very GoodNo problems noted.
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 evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating40 US tons
Inventory rating36 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length53 ft (16.1 m)
Longest span48 ft (14.6 m)
Deck width18 ft (5.6 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15 (2022)
Projected traffic17 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed100 mi (161 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 56.5 over Plateau Creek built?

It was built in 1984, making it 41 years old in 2025.

What condition is County Road 56.5 over Plateau 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 January 2024.

How much traffic does County Road 56.5 over Plateau Creek carry?

About 15 vehicles per day (2022 count).

How long is County Road 56.5 over Plateau Creek?

The structure is 53 ft (16.1 m) long with a longest span of 48 ft (14.6 m) and a deck 18 ft wide.

Who owns County Road 56.5 over Plateau Creek?

It is owned by the County Highway Agency.