US Bridges

I70 Ml over 40th Ave.

Good

Jefferson County, Colorado · 40th & Youngsfield · Structure no. E-16-XA

Built
2009
16 years old
Condition
Good
inspected January 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
73 ft
1 main span
Daily traffic
104,000
2020 count
Owner
State
State Highway Agency

About this bridge

I70 Ml over 40th Ave. is a prestressed concrete box beam or girders - multiple carrying I70 Ml over 40th Ave. in Jefferson County, Colorado. It was built in 2009, so it is 16 years old, younger than the Colorado average of 42.2 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 104,000 vehicles a day, roughly 8% of them trucks, projected to reach 133,120 by 2040. The structure is 73 ft (22.4 m) long and 183 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI70 Ml
Crosses40th Ave.
Location40th & Youngsfield
RouteInterstate 70A
Coordinates39.76914, -105.14288
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating57.2 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length73 ft (22.4 m)
Longest span70 ft (21.2 m)
Deck width183 ft (55.8 m)
Roadway width128 ft (39 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic104,000 (2020)
Projected traffic133,120 by 2040
Trucks8%
Lanes on structure7
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 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 I70 Ml over 40th Ave. built?

It was built in 2009, making it 16 years old in 2025.

What condition is I70 Ml over 40th Ave. in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in January 2024.

How much traffic does I70 Ml over 40th Ave. carry?

About 104,000 vehicles per day (2020 count), of which roughly 8% are trucks.

How long is I70 Ml over 40th Ave.?

The structure is 73 ft (22.4 m) long with a longest span of 70 ft (21.2 m) and a deck 183 ft wide.

Who owns I70 Ml over 40th Ave.?

It is owned by the State Highway Agency.