US Bridges

Rampart Range Road over Willow Creek

Fair

Douglas County, Colorado · 0.6 MI N of Waterton · Structure no. DOU007-01.28

Built
1985
40 years old
Condition
Fair
inspected February 2025
Type
Culvert
Concrete
Length
44 ft
3 main spans
Daily traffic
11,744
2022 count
Owner
County
County Highway Agency

About this bridge

Rampart Range Road over Willow Creek is a concrete culvert carrying Rampart Range Road 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 11,744 vehicles a day, roughly 9% of them trucks, projected to reach 15,737 by 2042. The structure is 44 ft (13.5 m) long and 40 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

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CarriesRampart Range Road
CrossesWillow Creek
Location0.6 MI N of Waterton
RouteCounty Highway 0
CountyDouglas County
StateColorado
Coordinates39.48949, -105.07324
Functional classRural Minor Arterial

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 inspectionFebruary 2025
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
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 loadUnknown
Structure length44 ft (13.5 m)
Longest span17 ft (5.2 m)
Deck width40 ft (12.2 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,744 (2022)
Projected traffic15,737 by 2042
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Rampart Range Road over Willow Creek built?

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

What condition is Rampart Range Road 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 February 2025.

How much traffic does Rampart Range Road over Willow Creek carry?

About 11,744 vehicles per day (2022 count), of which roughly 9% are trucks.

How long is Rampart Range Road over Willow Creek?

The structure is 44 ft (13.5 m) long with a longest span of 17 ft (5.2 m) and a deck 40 ft wide.

Who owns Rampart Range Road over Willow Creek?

It is owned by the County Highway Agency.