US Bridges

Rock Creek Pkwy over Community Ditch

Poor

Boulder County, Colorado · 300 Ft East of Mccaslin · Structure no. SUPER-ROKCKBL-B

Built
2000
25 years old
Condition
Poor
inspected February 2025
Type
Frame
Concrete
Length
35 ft
1 main span
Daily traffic
7,760
2023 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Rock Creek Pkwy over Community Ditch is a concrete frame carrying Rock Creek Pkwy over Community Ditch in Boulder 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 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 7,760 vehicles a day, roughly 4% of them trucks, projected to reach 9,312 by 2043. The structure is 35 ft (10.7 m) long and 131 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesRock Creek Pkwy
CrossesCommunity Ditch
Location300 Ft East of Mccaslin
RouteCity Street 0
CountyBoulder County
StateColorado
Coordinates39.94539, -105.1625
Functional classUrban Collector

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 protection8 Very GoodNo problems noted.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40 US tons
Inventory rating36 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length35 ft (10.7 m)
Longest span32 ft (9.8 m)
Deck width131 ft (39.9 m)
Roadway width36 ft (10.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,760 (2023)
Projected traffic9,312 by 2043
Trucks4%
Lanes on structure6
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

OwnerTown or Township Highway Agency
Maintained byTown or Township 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 Rock Creek Pkwy over Community Ditch built?

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

What condition is Rock Creek Pkwy over Community Ditch 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 February 2025.

How much traffic does Rock Creek Pkwy over Community Ditch carry?

About 7,760 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Rock Creek Pkwy over Community Ditch?

The structure is 35 ft (10.7 m) long with a longest span of 32 ft (9.8 m) and a deck 131 ft wide.

Who owns Rock Creek Pkwy over Community Ditch?

It is owned by the Town or Township Highway Agency.