US Bridges

64th Avenue over Local Drainage | Blunn T

Fair

Jefferson County, Colorado · 1.1 MI East of SH 93 · Structure no. ARVA-64-1.1-01

Built
2000
25 years old
Condition
Fair
inspected March 2025
Type
Frame
Concrete
Length
27 ft
1 main span
Daily traffic
183
2021 count
Owner
City
City or Municipal Highway Agency

About this bridge

64th Avenue over Local Drainage | Blunn T is a concrete frame carrying 64th Avenue over Local Drainage | Blunn T in Jefferson County, Colorado. It was built in 2000, so it is 25 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 5 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 183 vehicles a day, roughly 3% of them trucks, projected to reach 210 by 2041. The structure is 27 ft (8.1 m) long and 129 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
Carries64th Avenue
CrossesLocal Drainage | Blunn T
Location1.1 MI East of SH 93
RouteCity Street 0
CountyJefferson County
StateColorado
Coordinates39.81361, -105.20052
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
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 rating110.1 US tons
Inventory rating110.1 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckOther
Main spans1
Design loadHS 20
Structure length27 ft (8.1 m)
Longest span24 ft (7.3 m)
Deck width129 ft (39.3 m)
Roadway width60 ft (18.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic183 (2021)
Projected traffic210 by 2041
Trucks3%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 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 64th Avenue over Local Drainage | Blunn T built?

It was built in 2000, making it 25 years old in 2025.

What condition is 64th Avenue over Local Drainage | Blunn T 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 March 2025.

How much traffic does 64th Avenue over Local Drainage | Blunn T carry?

About 183 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is 64th Avenue over Local Drainage | Blunn T?

The structure is 27 ft (8.1 m) long with a longest span of 24 ft (7.3 m) and a deck 129 ft wide.

Who owns 64th Avenue over Local Drainage | Blunn T?

It is owned by the City or Municipal Highway Agency.