US Bridges

12th Ave over Westerly Creek

Fair

Denver County, Colorado · Alley E of Xanthia ST · Structure no. D-21-WYC-020

Built
1983
42 years old
Condition
Fair
inspected November 2024
Type
Culvert
Concrete
Length
22 ft
2 main spans
Daily traffic
419
2021 count
Owner
City
City or Municipal Highway Agency

About this bridge

12th Ave over Westerly Creek is a concrete culvert carrying 12th Ave over Westerly Creek in Denver County, Colorado. It was built in 1983, so it is 42 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 419 vehicles a day, roughly 2% of them trucks, projected to reach 465 by 2041. The structure is 22 ft (6.7 m) long and 308 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
Carries12th Ave
CrossesWesterly Creek
LocationAlley E of Xanthia ST
RouteCity Street 0
CountyDenver County
StateColorado
Coordinates39.73555, -104.88653
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2024
Inspection intervalevery 24 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 alignment7: Better than present minimum criteria
Operating rating40 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadUnknown
Structure length22 ft (6.7 m)
Longest span10 ft (3.2 m)
Deck width308 ft (94 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic419 (2021)
Projected traffic465 by 2041
Trucks2%
Lanes on structure2
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 12th Ave over Westerly Creek built?

It was built in 1983, making it 42 years old in 2025.

What condition is 12th Ave over Westerly 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 November 2024.

How much traffic does 12th Ave over Westerly Creek carry?

About 419 vehicles per day (2021 count), of which roughly 2% are trucks.

How long is 12th Ave over Westerly Creek?

The structure is 22 ft (6.7 m) long with a longest span of 10 ft (3.2 m) and a deck 308 ft wide.

Who owns 12th Ave over Westerly Creek?

It is owned by the City or Municipal Highway Agency.