US Bridges

E-470 Off-Ramp over Cottonwood Creek

Good

Douglas County, Colorado · 0.47 MI from I-25 · Structure no. E-470-0.47D

Built
2003
22 years old
Condition
Good
inspected August 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
77 ft
1 main span
Daily traffic
800
2018 count
Owner
Toll Authority
Local Toll Authority

About this bridge

E-470 Off-Ramp over Cottonwood Creek is a prestressed concrete stringer/multi-beam or girder carrying E-470 Off-Ramp over Cottonwood Creek in Douglas County, Colorado. It was built in 2003, so it is 22 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 800 vehicles a day, roughly 6% of them trucks, projected to reach 1,360 by 2038. The structure is 77 ft (23.6 m) long and 54 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesE-470 Off-Ramp
CrossesCottonwood Creek
Location0.47 MI from I-25
Coordinates39.55486, -104.86139
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating64.3 US tons
Inventory rating43.2 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length77 ft (23.6 m)
Longest span75 ft (22.9 m)
Deck width54 ft (16.5 m)
Roadway width52 ft (15.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic800 (2018)
Projected traffic1,360 by 2038
Trucks6%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a toll road
National Highway SystemYes

Ownership and planned work

OwnerLocal Toll Authority
Maintained byLocal Toll Authority
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 E-470 Off-Ramp over Cottonwood Creek built?

It was built in 2003, making it 22 years old in 2025.

What condition is E-470 Off-Ramp over Cottonwood Creek 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 August 2024.

How much traffic does E-470 Off-Ramp over Cottonwood Creek carry?

About 800 vehicles per day (2018 count), of which roughly 6% are trucks.

How long is E-470 Off-Ramp over Cottonwood Creek?

The structure is 77 ft (23.6 m) long with a longest span of 75 ft (22.9 m) and a deck 54 ft wide.

Who owns E-470 Off-Ramp over Cottonwood Creek?

It is owned by the Local Toll Authority.