US Bridges

Collins Avenue over Lakewood Gulch

Fair

Jefferson County, Colorado · 0.1 MI E of Simms ST · Structure no. LKWD-05-0.80-01

Built
1997
28 years old
Condition
Fair
inspected April 2023
Type
Culvert
Concrete
Length
45 ft
3 main spans
Daily traffic
2,008
2021 count
Owner
City
City or Municipal Highway Agency

About this bridge

Collins Avenue over Lakewood Gulch is a concrete culvert carrying Collins Avenue over Lakewood Gulch in Jefferson County, Colorado. It was built in 1997, so it is 28 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 2,008 vehicles a day, roughly 2% of them trucks, projected to reach 2,309 by 2041. The structure is 45 ft (13.6 m) long and 75 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesCollins Avenue
CrossesLakewood Gulch
Location0.1 MI E of Simms ST
RouteCity Street 0
CountyJefferson County
StateColorado
Coordinates39.73438, -105.12593
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 protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
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 adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating110.1 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20
Structure length45 ft (13.6 m)
Longest span14 ft (4.3 m)
Deck width75 ft (22.9 m)
Roadway width48 ft (14.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,008 (2021)
Projected traffic2,309 by 2041
Trucks2%
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 Collins Avenue over Lakewood Gulch built?

It was built in 1997, making it 28 years old in 2025.

What condition is Collins Avenue over Lakewood 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 April 2023.

How much traffic does Collins Avenue over Lakewood Gulch carry?

About 2,008 vehicles per day (2021 count), of which roughly 2% are trucks.

How long is Collins Avenue over Lakewood Gulch?

The structure is 45 ft (13.6 m) long with a longest span of 14 ft (4.3 m) and a deck 75 ft wide.

Who owns Collins Avenue over Lakewood Gulch?

It is owned by the City or Municipal Highway Agency.