US Bridges

North Avenue over Drainage

Poor

Jefferson County, Colorado · E. of Union Blvd. · Structure no. 2195010P0000000

Built
1942
83 years old
Condition
Poor
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
31 ft
1 main span
Daily traffic
1,100
2019 count
Owner
Unknown

About this bridge

North Avenue over Drainage is a steel stringer/multi-beam or girder carrying North Avenue over Drainage in Jefferson County, Colorado. It was built in 1942, so it is 83 years old, older than the Colorado average of 42.2 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 1,100 vehicles a day, projected to reach 1,210 by 2039. The structure is 31 ft (9.4 m) long and 31 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesNorth Avenue
CrossesDrainage
LocationE. of Union Blvd.
RouteFederal Lands Road 0
CountyJefferson County
StateColorado
Coordinates39.70752, -105.11954
Functional classUrban Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating34 US tons
Inventory rating20 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length31 ft (9.4 m)
Longest span27 ft (8.2 m)
Deck width31 ft (9.5 m)
Roadway width29 ft (8.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,100 (2019)
Projected traffic1,210 by 2039
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerNot reported
Maintained byNot reported
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$180,000 (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was North Avenue over Drainage built?

It was built in 1942, making it 83 years old in 2025.

What condition is North Avenue over Drainage in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in April 2023.

How much traffic does North Avenue over Drainage carry?

About 1,100 vehicles per day (2019 count).

How long is North Avenue over Drainage?

The structure is 31 ft (9.4 m) long with a longest span of 27 ft (8.2 m) and a deck 31 ft wide.

Who owns North Avenue over Drainage?

It is owned by the owner is not reported.