US Bridges

Pearl Parkway over S. Goose Creek Drainage

Fair

Boulder County, Colorado · At 49th Street · Structure no. BOLD-18-1.83-01

Built
1986
39 years old
Condition
Fair
inspected February 2025
Type
Culvert
Concrete
Length
75 ft
3 main spans
Daily traffic
10,375
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Pearl Parkway over S. Goose Creek Drainage is a concrete culvert carrying Pearl Parkway over S. Goose Creek Drainage in Boulder County, Colorado. It was built in 1986, so it is 39 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 10,375 vehicles a day, roughly 8% of them trucks, projected to reach 12,450 by 2042. The structure is 75 ft (22.9 m) long and 127 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesPearl Parkway
CrossesS. Goose Creek Drainage
LocationAt 49th Street
RouteCity Street 0
CountyBoulder County
StateColorado
Coordinates40.02181, -105.23812
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
Channel and channel protection7 GoodSome minor problems.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionFebruary 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 geometry9: Superior to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20
Structure length75 ft (22.9 m)
Longest span28 ft (8.5 m)
Deck width127 ft (38.6 m)
Roadway width68 ft (20.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,375 (2023)
Projected traffic12,450 by 2042
Trucks8%
Lanes on structure4
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Pearl Parkway over S. Goose Creek Drainage built?

It was built in 1986, making it 39 years old in 2025.

What condition is Pearl Parkway over S. Goose Creek Drainage 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 February 2025.

How much traffic does Pearl Parkway over S. Goose Creek Drainage carry?

About 10,375 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is Pearl Parkway over S. Goose Creek Drainage?

The structure is 75 ft (22.9 m) long with a longest span of 28 ft (8.5 m) and a deck 127 ft wide.

Who owns Pearl Parkway over S. Goose Creek Drainage?

It is owned by the City or Municipal Highway Agency.