US Bridges

On Ramp to C-470WB over Centennial Trail

Good

Douglas County, Colorado · Just W of Quebec · Structure no. F-17-LR

Built
2019
6 years old
Condition
Good
inspected March 2023
Type
Culvert
Concrete
Length
25 ft
1 main span
Daily traffic
—
Owner
State
State Highway Agency

About this bridge

On Ramp to C-470WB over Centennial Trail is a concrete culvert carrying On Ramp to C-470WB over Centennial Trail in Douglas County, Colorado. It was built in 2019, so it is 6 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.

No traffic count is recorded. The structure is 25 ft (7.6 m) long and 82 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesOn Ramp to C-470WB
CrossesCentennial Trail
LocationJust W of Quebec
RouteU.S. Route 470A
Coordinates39.56431, -104.90323
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
Culvert8 Very GoodNo problems noted.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50 US tons
Inventory rating39.2 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHL 93
Structure length25 ft (7.6 m)
Longest span25 ft (7.6 m)
Deck width82 ft (24.9 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic—
Projected traffic—
Trucks0%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesPedestrian / bicycle
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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 On Ramp to C-470WB over Centennial Trail built?

It was built in 2019, making it 6 years old in 2025.

What condition is On Ramp to C-470WB over Centennial Trail 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 March 2023.

How much traffic does On Ramp to C-470WB over Centennial Trail carry?

No traffic count is recorded for this structure.

How long is On Ramp to C-470WB over Centennial Trail?

The structure is 25 ft (7.6 m) long with a longest span of 25 ft (7.6 m) and a deck 82 ft wide.

Who owns On Ramp to C-470WB over Centennial Trail?

It is owned by the State Highway Agency.