US Bridges

County Road 3 over I 70 Ml

Fair

Kit Carson County, Colorado · 2.0 MI W. of Flagler · Structure no. G-24-Z

Built
1975
50 years old
Condition
Fair
inspected November 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
278 ft
2 main spans
Daily traffic
14
2022 count
Owner
State
State Highway Agency

About this bridge

County Road 3 over I 70 Ml is a steel continuous stringer/multi-beam or girder carrying County Road 3 over I 70 Ml in Kit Carson County, Colorado. It was built in 1975, so it is 50 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 14 vehicles a day, projected to reach 17 by 2042. The structure is 278 ft (84.6 m) long and 36 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesCounty Road 3
CrossesI 70 Ml
Location2.0 MI W. of Flagler
RouteCounty Highway 70A
CountyKit Carson County
StateColorado
Coordinates39.28702, -103.09902
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44.6 US tons
Inventory rating26.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length278 ft (84.6 m)
Longest span140 ft (42.7 m)
Deck width36 ft (11.1 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14 (2022)
Projected traffic17 by 2042
Trucks0%
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 3 over I 70 Ml built?

It was built in 1975, making it 50 years old in 2025.

What condition is County Road 3 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 November 2023.

How much traffic does County Road 3 over I 70 Ml carry?

About 14 vehicles per day (2022 count).

How long is County Road 3 over I 70 Ml?

The structure is 278 ft (84.6 m) long with a longest span of 140 ft (42.7 m) and a deck 36 ft wide.

Who owns County Road 3 over I 70 Ml?

It is owned by the State Highway Agency.