US Bridges

Valmont RD (cr 52) over South Boulder Creek

Fair

Boulder County, Colorado · 0.4 MI E of 55th St. · Structure no. BC-52-2.1-SB-A

Built
2006
19 years old
Condition
Fair
inspected February 2025
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
189 ft
2 main spans
Daily traffic
15,236
2023 count
Owner
County
County Highway Agency

About this bridge

Valmont RD (cr 52) over South Boulder Creek is a prestressed concrete continuous box beam or girders - multiple carrying Valmont RD (cr 52) over South Boulder Creek in Boulder County, Colorado. It was built in 2006, so it is 19 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 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 15,236 vehicles a day, roughly 11% of them trucks, projected to reach 18,283 by 2043. The structure is 189 ft (57.6 m) long and 76 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesValmont RD (cr 52)
CrossesSouth Boulder Creek
Location0.4 MI E of 55th St.
RouteCounty Highway 0
CountyBoulder County
StateColorado
Coordinates40.02915, -105.21865
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
Deck8 Very GoodNo problems noted.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating72.1 US tons
Inventory rating43.2 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length189 ft (57.6 m)
Longest span90 ft (27.4 m)
Deck width76 ft (23.2 m)
Roadway width74 ft (22.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,236 (2023)
Projected traffic18,283 by 2043
Trucks11%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 Valmont RD (cr 52) over South Boulder Creek built?

It was built in 2006, making it 19 years old in 2025.

What condition is Valmont RD (cr 52) over South Boulder Creek 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 Valmont RD (cr 52) over South Boulder Creek carry?

About 15,236 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is Valmont RD (cr 52) over South Boulder Creek?

The structure is 189 ft (57.6 m) long with a longest span of 90 ft (27.4 m) and a deck 76 ft wide.

Who owns Valmont RD (cr 52) over South Boulder Creek?

It is owned by the County Highway Agency.