US Bridges

Ramp to US 285 Nbd over Parmalee Gulch R

Good

Jefferson County, Colorado · Indian Hills RD Intsctn · Structure no. F-16-SO

Built
1993
32 years old
Condition
Good
inspected August 2023
Type
Culvert
Concrete
Length
42 ft
3 main spans
Daily traffic
13,500
2020 count
Owner
State
State Highway Agency

About this bridge

Ramp to US 285 Nbd over Parmalee Gulch R is a concrete culvert carrying Ramp to US 285 Nbd over Parmalee Gulch R in Jefferson County, Colorado. It was built in 1993, so it is 32 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 13,500 vehicles a day, roughly 3% of them trucks, projected to reach 17,010 by 2040. The structure is 42 ft (12.9 m) long and 57 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesRamp to US 285 Nbd
CrossesParmalee Gulch R
LocationIndian Hills RD Intsctn
RouteU.S. Route 285D
Coordinates39.6157, -105.23414
Functional classRural Principal Arterial - Other

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71.2 US tons
Inventory rating42.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20
Structure length42 ft (12.9 m)
Longest span16 ft (4.8 m)
Deck width57 ft (17.5 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,500 (2020)
Projected traffic17,010 by 2040
Trucks3%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 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 Ramp to US 285 Nbd over Parmalee Gulch R built?

It was built in 1993, making it 32 years old in 2025.

What condition is Ramp to US 285 Nbd over Parmalee Gulch R 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 August 2023.

How much traffic does Ramp to US 285 Nbd over Parmalee Gulch R carry?

About 13,500 vehicles per day (2020 count), of which roughly 3% are trucks.

How long is Ramp to US 285 Nbd over Parmalee Gulch R?

The structure is 42 ft (12.9 m) long with a longest span of 16 ft (4.8 m) and a deck 57 ft wide.

Who owns Ramp to US 285 Nbd over Parmalee Gulch R?

It is owned by the State Highway Agency.