US Bridges

County Road 30 over I 70 Ml

Fair

Kit Carson County, Colorado · 0.5 Mile W of Stratton · Structure no. G-26-O

Built
1965
60 years old
Condition
Fair
inspected July 2023
Type
Tee Beam
Concrete Continuous
Length
247 ft
5 main spans
Daily traffic
419
2014 count
Owner
State
State Highway Agency

About this bridge

County Road 30 over I 70 Ml is a concrete continuous tee beam carrying County Road 30 over I 70 Ml in Kit Carson 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 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 419 vehicles a day, projected to reach 616 by 2034. The structure is 247 ft (75.3 m) long and 28 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesCounty Road 30
CrossesI 70 Ml
Location0.5 Mile W of Stratton
RouteCounty Highway 0
CountyKit Carson County
StateColorado
Coordinates39.29412, -102.61405
Functional classRural Major Collector

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 inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating41 US tons
Inventory rating24 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 25 or greater
Structure length247 ft (75.3 m)
Longest span57 ft (17.4 m)
Deck width28 ft (8.5 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic419 (2014)
Projected traffic616 by 2034
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed6.2 mi (10 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 30 over I 70 Ml built?

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

What condition is County Road 30 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 30 over I 70 Ml carry?

About 419 vehicles per day (2014 count).

How long is County Road 30 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 28 ft wide.

Who owns County Road 30 over I 70 Ml?

It is owned by the State Highway Agency.