US Bridges

I 70 Ml over Drain Ditch

Fair

Kit Carson County, Colorado · 1.0 Mi. E. of US 385 · Structure no. G-27-AA

Built
1968
57 years old, rebuilt 2009
Condition
Fair
inspected July 2023
Type
Culvert
Concrete
Length
31 ft
3 main spans
Daily traffic
8,000
2020 count
Owner
State
State Highway Agency

About this bridge

I 70 Ml over Drain Ditch is a concrete culvert carrying I 70 Ml over Drain Ditch in Kit Carson County, Colorado. It was built in 1968 and reconstructed in 2009, so it is 57 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 8,000 vehicles a day, roughly 31% of them trucks, projected to reach 9,360 by 2040. The structure is 31 ft (9.6 m) long. If it were closed, the detour would be 0.6 mi (1 km).

CarriesI 70 Ml
CrossesDrain Ditch
Location1.0 Mi. E. of US 385
RouteInterstate 70A
Coordinates39.29718, -102.26037
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating100.6 US tons
Inventory rating60.2 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20
Structure length31 ft (9.6 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,000 (2020)
Projected traffic9,360 by 2040
Trucks31%
Lanes on structure5
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 I 70 Ml over Drain Ditch built?

It was built in 1968, making it 57 years old in 2025. It was reconstructed in 2009.

What condition is I 70 Ml over Drain Ditch 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 I 70 Ml over Drain Ditch carry?

About 8,000 vehicles per day (2020 count), of which roughly 31% are trucks.

How long is I 70 Ml over Drain Ditch?

The structure is 31 ft (9.6 m) long with a longest span of 12 ft (3.7 m).

Who owns I 70 Ml over Drain Ditch?

It is owned by the State Highway Agency.