US Bridges

Parkway Drive over Willow Creek

Fair

Douglas County, Colorado · Just W of Willow Street · Structure no. LONE TREE-1

Built
1985
40 years old
Condition
Fair
inspected January 2023
Type
Culvert
Concrete
Length
38 ft
3 main spans
Daily traffic
2,454
2021 count
Owner
City
City or Municipal Highway Agency

About this bridge

Parkway Drive over Willow Creek is a concrete culvert carrying Parkway Drive over Willow Creek in Douglas County, Colorado. It was built in 1985, so it is 40 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 2,454 vehicles a day, roughly 4% of them trucks, projected to reach 3,289 by 2041. The structure is 38 ft (11.7 m) long and 153 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesParkway Drive
CrossesWillow Creek
LocationJust W of Willow Street
RouteCity Street 0
CountyDouglas County
StateColorado
Coordinates39.56411, -104.88817
Functional classUrban Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20
Structure length38 ft (11.7 m)
Longest span12 ft (3.7 m)
Deck width153 ft (46.5 m)
Roadway width64 ft (19.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,454 (2021)
Projected traffic3,289 by 2041
Trucks4%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Parkway Drive over Willow Creek built?

It was built in 1985, making it 40 years old in 2025.

What condition is Parkway Drive over Willow 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 January 2023.

How much traffic does Parkway Drive over Willow Creek carry?

About 2,454 vehicles per day (2021 count), of which roughly 4% are trucks.

How long is Parkway Drive over Willow Creek?

The structure is 38 ft (11.7 m) long with a longest span of 12 ft (3.7 m) and a deck 153 ft wide.

Who owns Parkway Drive over Willow Creek?

It is owned by the City or Municipal Highway Agency.