US Bridges

County Road 23 over I 70 Ml

Good

Mesa County, Colorado · 1.3 MI E of JCT US 6 Ml · Structure no. H-02-Q

Built
1965
60 years old
Condition
Good
inspected February 2024
Type
Tee Beam
Concrete Continuous
Length
190 ft
4 main spans
Daily traffic
2,411
2022 count
Owner
State
State Highway Agency

About this bridge

County Road 23 over I 70 Ml is a concrete continuous tee beam carrying County Road 23 over I 70 Ml in Mesa County, Colorado. It was built in 1965, so it is 60 years old, older than the Colorado average of 42.2 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 2,411 vehicles a day, roughly 5% of them trucks, projected to reach 2,821 by 2042. The structure is 190 ft (57.9 m) long and 32 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesCounty Road 23
CrossesI 70 Ml
Location1.3 MI E of JCT US 6 Ml
RouteCounty Highway 0
Coordinates39.11373, -108.62662
Functional classUrban Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating54.6 US tons
Inventory rating32.7 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length190 ft (57.9 m)
Longest span54 ft (16.5 m)
Deck width32 ft (9.8 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,411 (2022)
Projected traffic2,821 by 2042
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 23 over I 70 Ml built?

It was built in 1965, making it 60 years old in 2025.

What condition is County Road 23 over I 70 Ml in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in February 2024.

How much traffic does County Road 23 over I 70 Ml carry?

About 2,411 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is County Road 23 over I 70 Ml?

The structure is 190 ft (57.9 m) long with a longest span of 54 ft (16.5 m) and a deck 32 ft wide.

Who owns County Road 23 over I 70 Ml?

It is owned by the State Highway Agency.