US Bridges

I 70 Wbnd over Forest Service Road

Good

Summit County, Colorado · 2.6 MI W of Eisenhwr Tunl · Structure no. F-13-V

Built
2021
4 years old
Condition
Good
inspected April 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
48 ft
1 main span
Daily traffic
36,000
2018 count
Owner
State
State Highway Agency

About this bridge

I 70 Wbnd over Forest Service Road is a prestressed concrete box beam or girders - multiple carrying I 70 Wbnd over Forest Service Road in Summit County, Colorado. It was built in 2021, so it is 4 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 36,000 vehicles a day, roughly 10% of them trucks, projected to reach 43,500 by 2031. The structure is 48 ft (14.7 m) long and 73 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

CarriesI 70 Wbnd
CrossesForest Service Road
Location2.6 MI W of Eisenhwr Tunl
RouteInterstate 70A
Coordinates39.66573, -105.9779
Functional classRural 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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53.6 US tons
Inventory rating41.4 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length48 ft (14.7 m)
Longest span43 ft (13.2 m)
Deck width73 ft (22.3 m)
Roadway width52 ft (15.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic36,000 (2018)
Projected traffic43,500 by 2031
Trucks10%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed11.2 mi (18 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 Wbnd over Forest Service Road built?

It was built in 2021, making it 4 years old in 2025.

What condition is I 70 Wbnd over Forest Service Road 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 April 2023.

How much traffic does I 70 Wbnd over Forest Service Road carry?

About 36,000 vehicles per day (2018 count), of which roughly 10% are trucks.

How long is I 70 Wbnd over Forest Service Road?

The structure is 48 ft (14.7 m) long with a longest span of 43 ft (13.2 m) and a deck 73 ft wide.

Who owns I 70 Wbnd over Forest Service Road?

It is owned by the State Highway Agency.