US Bridges

Alley over Weir Gulch

Good

Denver County, Colorado · Alley W of Perry ST · Structure no. D-17-WG-100

Built
1976
49 years old
Condition
Good
inspected January 2025
Type
Culvert
Concrete
Length
25 ft
1 main span
Daily traffic
26
2021 count
Owner
City
City or Municipal Highway Agency

About this bridge

Alley over Weir Gulch is a concrete culvert carrying Alley over Weir Gulch in Denver County, Colorado. It was built in 1976, so it is 49 years old, older 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 26 vehicles a day, projected to reach 29 by 2041. The structure is 25 ft (7.6 m) long and 15 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesAlley
CrossesWeir Gulch
LocationAlley W of Perry ST
RouteCity Street 0
Coordinates39.71876, -105.04032
Functional classUrban Local

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 inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating91.4 US tons
Inventory rating54.8 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 20
Structure length25 ft (7.6 m)
Longest span25 ft (7.6 m)
Deck width15 ft (4.6 m)
Roadway width11 ft (3.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic26 (2021)
Projected traffic29 by 2041
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
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 Alley over Weir Gulch built?

It was built in 1976, making it 49 years old in 2025.

What condition is Alley over Weir 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 January 2025.

How much traffic does Alley over Weir Gulch carry?

About 26 vehicles per day (2021 count).

How long is Alley over Weir Gulch?

The structure is 25 ft (7.6 m) long with a longest span of 25 ft (7.6 m) and a deck 15 ft wide.

Who owns Alley over Weir Gulch?

It is owned by the City or Municipal Highway Agency.