US Bridges

County Road 40 over I 70 Ml

Fair

Kit Carson County, Colorado · 9.5 Mi. E. of Jct. SH 57 · Structure no. G-27-Q

Built
1966
59 years old
Condition
Fair
inspected July 2023
Type
Tee Beam
Concrete Continuous
Length
247 ft
5 main spans
Daily traffic
339
2022 count
Owner
State
State Highway Agency

About this bridge

County Road 40 over I 70 Ml is a concrete continuous tee beam carrying County Road 40 over I 70 Ml in Kit Carson County, Colorado. It was built in 1966, so it is 59 years old, older 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 339 vehicles a day, roughly 2% of them trucks, projected to reach 393 by 2042. The structure is 247 ft (75.3 m) long and 32 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesCounty Road 40
CrossesI 70 Ml
Location9.5 Mi. E. of Jct. SH 57
RouteCounty Highway 70A
CountyKit Carson County
StateColorado
Coordinates39.29364, -102.42796
Functional classRural Principal Arterial - Interstate

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.
Substructure7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52.2 US tons
Inventory rating31.3 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20 + Mod
Structure length247 ft (75.3 m)
Longest span57 ft (17.4 m)
Deck width32 ft (9.8 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic339 (2022)
Projected traffic393 by 2042
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed0.6 mi (1 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 40 over I 70 Ml built?

It was built in 1966, making it 59 years old in 2025.

What condition is County Road 40 over I 70 Ml 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 July 2023.

How much traffic does County Road 40 over I 70 Ml carry?

About 339 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is County Road 40 over I 70 Ml?

The structure is 247 ft (75.3 m) long with a longest span of 57 ft (17.4 m) and a deck 32 ft wide.

Who owns County Road 40 over I 70 Ml?

It is owned by the State Highway Agency.