US Bridges

Red Rock Drive over West Plum Creek

Fair

Douglas County, Colorado · .15 MI W of Perry Park RD · Structure no. DOU105-REDROCK

Built
1985
40 years old
Condition
Fair
inspected January 2025
Type
Culvert
Steel
Length
20 ft
1 main span
Daily traffic
3,339
2021 count
Owner
County
County Highway Agency

About this bridge

Red Rock Drive over West Plum Creek is a steel culvert carrying Red Rock Drive over West Plum 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 3,339 vehicles a day, projected to reach 4,475 by 2041. The structure is 20 ft (6.1 m) long and 58 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesRed Rock Drive
CrossesWest Plum Creek
Location.15 MI W of Perry Park RD
RouteCounty Highway 0
CountyDouglas County
StateColorado
Coordinates39.24078, -104.95897
Functional classRural 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 protection8 Very GoodNo problems noted.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating27 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans1
Design loadUnknown
Structure length20 ft (6.1 m)
Longest span20 ft (6.1 m)
Deck width58 ft (17.7 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,339 (2021)
Projected traffic4,475 by 2041
Trucks0%
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 Red Rock Drive over West Plum Creek built?

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

What condition is Red Rock Drive over West Plum 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 2025.

How much traffic does Red Rock Drive over West Plum Creek carry?

About 3,339 vehicles per day (2021 count).

How long is Red Rock Drive over West Plum Creek?

The structure is 20 ft (6.1 m) long with a longest span of 20 ft (6.1 m) and a deck 58 ft wide.

Who owns Red Rock Drive over West Plum Creek?

It is owned by the County Highway Agency.