US Bridges

W 1st Avenue over Weir Gulch

Fair

Denver County, Colorado · Btwn Raleigh | Quitman · Structure no. D-17-WG-080

Built
1977
48 years old
Condition
Fair
inspected January 2025
Type
Culvert
Concrete
Length
25 ft
2 main spans
Daily traffic
7,307
2021 count
Owner
City
City or Municipal Highway Agency

About this bridge

W 1st Avenue over Weir Gulch is a concrete culvert carrying W 1st Avenue over Weir Gulch in Denver County, Colorado. It was built in 1977, so it is 48 years old, older 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 7,307 vehicles a day, roughly 4% of them trucks, projected to reach 8,110 by 2041. The structure is 25 ft (7.6 m) long and 79 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesW 1st Avenue
CrossesWeir Gulch
LocationBtwn Raleigh | Quitman
RouteCity Street 0
CountyDenver County
StateColorado
Coordinates39.71816, -105.04172
Functional classUrban Collector

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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44.8 US tons
Inventory rating26.8 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length25 ft (7.6 m)
Longest span12 ft (3.7 m)
Deck width79 ft (24.2 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,307 (2021)
Projected traffic8,110 by 2041
Trucks4%
Lanes on structure3
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 W 1st Avenue over Weir Gulch built?

It was built in 1977, making it 48 years old in 2025.

What condition is W 1st Avenue over Weir Gulch 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 W 1st Avenue over Weir Gulch carry?

About 7,307 vehicles per day (2021 count), of which roughly 4% are trucks.

How long is W 1st Avenue over Weir Gulch?

The structure is 25 ft (7.6 m) long with a longest span of 12 ft (3.7 m) and a deck 79 ft wide.

Who owns W 1st Avenue over Weir Gulch?

It is owned by the City or Municipal Highway Agency.