US Bridges

E-470 On-Ramp over Cottonwood Creek

Fair

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

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

About this bridge

E-470 On-Ramp over Cottonwood Creek is a prestressed concrete stringer/multi-beam or girder carrying E-470 On-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 fair condition with a lowest component rating of 6 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 800 vehicles a day, roughly 6% of them trucks, projected to reach 1,360 by 2038. The structure is 80 ft (24.5 m) long and 45 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesE-470 On-Ramp
CrossesCottonwood Creek
Location0.47 MI from I-25
Coordinates39.55311, -104.86205
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
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 geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating61.4 US tons
Inventory rating41.1 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length80 ft (24.5 m)
Longest span78 ft (23.8 m)
Deck width45 ft (13.7 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic800 (2018)
Projected traffic1,360 by 2038
Trucks6%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway and pedestrian
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 On-Ramp over Cottonwood Creek built?

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

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

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

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

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

The structure is 80 ft (24.5 m) long with a longest span of 78 ft (23.8 m) and a deck 45 ft wide.

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

It is owned by the Local Toll Authority.