US Bridges

County Road over I 70 Ml

Fair

Arapahoe County, Colorado · 0.8 MI E of JCT US 36 (by · Structure no. F-20-H

Built
1963
62 years old
Condition
Fair
inspected May 2023
Type
Tee Beam
Concrete Continuous
Length
232 ft
4 main spans
Daily traffic
54
2024 count
Owner
State
State Highway Agency

About this bridge

County Road over I 70 Ml is a concrete continuous tee beam carrying County Road over I 70 Ml in Arapahoe County, Colorado. It was built in 1963, so it is 62 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 54 vehicles a day, projected to reach 66 by 2044. The structure is 232 ft (70.8 m) long and 32 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesCounty Road
CrossesI 70 Ml
Location0.8 MI E of JCT US 36 (by
RouteCounty Highway 0
Coordinates39.71063, -104.2088
Functional classRural Minor 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
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 inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating44.4 US tons
Inventory rating26.6 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length232 ft (70.8 m)
Longest span73 ft (22.1 m)
Deck width32 ft (9.8 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic54 (2024)
Projected traffic66 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed3.7 mi (6 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 over I 70 Ml built?

It was built in 1963, making it 62 years old in 2025.

What condition is County Road 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 May 2023.

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

About 54 vehicles per day (2024 count).

How long is County Road over I 70 Ml?

The structure is 232 ft (70.8 m) long with a longest span of 73 ft (22.1 m) and a deck 32 ft wide.

Who owns County Road over I 70 Ml?

It is owned by the State Highway Agency.