US Bridges

Boulder Hills DR over Boulder Feeder Ditch

Fair

Boulder County, Colorado · 50 Ft E of Stirrup Lane · Structure no. BC-O-OSJ-9A

Built
1980
45 years old
Condition
Fair
inspected February 2025
Type
Tee Beam
Prestressed Concrete
Length
46 ft
1 main span
Daily traffic
209
2023 count
Owner
County
County Highway Agency

About this bridge

Boulder Hills DR over Boulder Feeder Ditch is a prestressed concrete tee beam carrying Boulder Hills DR over Boulder Feeder Ditch 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 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 209 vehicles a day, roughly 18% of them trucks, projected to reach 251 by 2043. The structure is 46 ft (14 m) long and 39 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

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CarriesBoulder Hills DR
CrossesBoulder Feeder Ditch
Location50 Ft E of Stirrup Lane
RouteCounty Highway 0
CountyBoulder County
StateColorado
Coordinates40.12793, -105.22005
Functional classRural Local

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry8: Equal to present desirable criteria
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 typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length46 ft (14 m)
Longest span41 ft (12.6 m)
Deck width39 ft (11.9 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic209 (2023)
Projected traffic251 by 2043
Trucks18%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Boulder Hills DR over Boulder Feeder Ditch built?

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

What condition is Boulder Hills DR over Boulder Feeder Ditch 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 Boulder Hills DR over Boulder Feeder Ditch carry?

About 209 vehicles per day (2023 count), of which roughly 18% are trucks.

How long is Boulder Hills DR over Boulder Feeder Ditch?

The structure is 46 ft (14 m) long with a longest span of 41 ft (12.6 m) and a deck 39 ft wide.

Who owns Boulder Hills DR over Boulder Feeder Ditch?

It is owned by the County Highway Agency.