US Bridges

US 385 Ml over I 70 Ml

Fair

Kit Carson County, Colorado · Burlington · Structure no. G-27-Y

Built
1968
57 years old
Condition
Fair
inspected January 2024
Type
Tee Beam
Concrete Continuous
Length
255 ft
5 main spans
Daily traffic
2,800
2020 count
Owner
State
State Highway Agency

About this bridge

US 385 Ml over I 70 Ml is a concrete continuous tee beam carrying US 385 Ml over I 70 Ml in Kit Carson County, Colorado. It was built in 1968, 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 5 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 2,800 vehicles a day, roughly 12% of them trucks, projected to reach 3,500 by 2040. The structure is 255 ft (77.7 m) long and 32 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesUS 385 Ml
CrossesI 70 Ml
LocationBurlington
RouteU.S. Route 385C
Coordinates39.29376, -102.27867
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2024
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 rating56.2 US tons
Inventory rating33.7 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length255 ft (77.7 m)
Longest span61 ft (18.6 m)
Deck width32 ft (9.8 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,800 (2020)
Projected traffic3,500 by 2040
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemYes

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 US 385 Ml over I 70 Ml built?

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

What condition is US 385 Ml 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 January 2024.

How much traffic does US 385 Ml over I 70 Ml carry?

About 2,800 vehicles per day (2020 count), of which roughly 12% are trucks.

How long is US 385 Ml over I 70 Ml?

The structure is 255 ft (77.7 m) long with a longest span of 61 ft (18.6 m) and a deck 32 ft wide.

Who owns US 385 Ml over I 70 Ml?

It is owned by the State Highway Agency.