US Bridges

Pratt Parkway over Bnrr and 1st Avenue

Fair

Boulder County, Colorado · 0.2 MI N of Boston Ave · Structure no. LONG-PRAPK-1ST

Built
1980
45 years old
Condition
Fair
inspected January 2025
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
259 ft
3 main spans
Daily traffic
11,924
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Pratt Parkway over Bnrr and 1st Avenue is a prestressed concrete stringer/multi-beam or girder carrying Pratt Parkway over Bnrr and 1st Avenue in Boulder County, Colorado. It was built in 1980, so it is 45 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 11,924 vehicles a day, roughly 4% of them trucks, projected to reach 14,308 by 2043. The structure is 259 ft (78.9 m) long and 65 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesPratt Parkway
CrossesBnrr and 1st Avenue
Location0.2 MI N of Boston Ave
RouteCity Street 0
CountyBoulder County
StateColorado
Coordinates40.15997, -105.10697
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating57.7 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length259 ft (78.9 m)
Longest span87 ft (26.4 m)
Deck width65 ft (19.9 m)
Roadway width55 ft (16.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,924 (2023)
Projected traffic14,308 by 2043
Trucks4%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway and railroad
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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$1.5 million (2019 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Pratt Parkway over Bnrr and 1st Avenue built?

It was built in 1980, making it 45 years old in 2025.

What condition is Pratt Parkway over Bnrr and 1st Avenue 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 Pratt Parkway over Bnrr and 1st Avenue carry?

About 11,924 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Pratt Parkway over Bnrr and 1st Avenue?

The structure is 259 ft (78.9 m) long with a longest span of 87 ft (26.4 m) and a deck 65 ft wide.

Who owns Pratt Parkway over Bnrr and 1st Avenue?

It is owned by the City or Municipal Highway Agency.