US Bridges

Mainstreet over Newlin Gulch

Good

Douglas County, Colorado · Just E of Chambers RD · Structure no. PAR MAINST-0.1

Built
2007
18 years old
Condition
Good
inspected February 2025
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
182 ft
3 main spans
Daily traffic
20,779
2021 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Mainstreet over Newlin Gulch is a prestressed concrete continuous stringer/multi-beam or girder carrying Mainstreet over Newlin Gulch in Douglas County, Colorado. It was built in 2007, so it is 18 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 20,779 vehicles a day, roughly 4% of them trucks, projected to reach 27,844 by 2041. The structure is 182 ft (55.6 m) long and 90 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesMainstreet
CrossesNewlin Gulch
LocationJust E of Chambers RD
RouteCity Street 0
Coordinates39.51698, -104.81134
Functional classUrban Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than 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 rating99 US tons
Inventory rating59.4 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length182 ft (55.6 m)
Longest span57 ft (17.4 m)
Deck width90 ft (27.4 m)
Roadway width54 ft (16.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20,779 (2021)
Projected traffic27,844 by 2041
Trucks4%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township 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 Mainstreet over Newlin Gulch built?

It was built in 2007, making it 18 years old in 2025.

What condition is Mainstreet over Newlin Gulch 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 February 2025.

How much traffic does Mainstreet over Newlin Gulch carry?

About 20,779 vehicles per day (2021 count), of which roughly 4% are trucks.

How long is Mainstreet over Newlin Gulch?

The structure is 182 ft (55.6 m) long with a longest span of 57 ft (17.4 m) and a deck 90 ft wide.

Who owns Mainstreet over Newlin Gulch?

It is owned by the Town or Township Highway Agency.