US Bridges

Hygiene RD (cr 10) over St. Vrain Creek

Fair

Boulder County, Colorado · 1.0 Miles West of County · Structure no. BC-10-3.1-SV

Built
1981
44 years old
Condition
Fair
inspected January 2025
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
104 ft
1 main span
Daily traffic
502
2023 count
Owner
County
County Highway Agency

About this bridge

Hygiene RD (cr 10) over St. Vrain Creek is a prestressed concrete stringer/multi-beam or girder carrying Hygiene RD (cr 10) over St. Vrain Creek in Boulder County, Colorado. It was built in 1981, so it is 44 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 502 vehicles a day, roughly 6% of them trucks, projected to reach 602 by 2043. The structure is 104 ft (31.6 m) long and 39 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesHygiene RD (cr 10)
CrossesSt. Vrain Creek
Location1.0 Miles West of County
RouteCounty Highway 0
CountyBoulder County
StateColorado
Coordinates40.18874, -105.19746
Functional classRural Minor Collector

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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating93.3 US tons
Inventory rating34.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length104 ft (31.6 m)
Longest span99 ft (30.1 m)
Deck width39 ft (11.8 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic502 (2023)
Projected traffic602 by 2043
Trucks6%
Lanes on structure2
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 Hygiene RD (cr 10) over St. Vrain Creek built?

It was built in 1981, making it 44 years old in 2025.

What condition is Hygiene RD (cr 10) over St. Vrain 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 January 2025.

How much traffic does Hygiene RD (cr 10) over St. Vrain Creek carry?

About 502 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is Hygiene RD (cr 10) over St. Vrain Creek?

The structure is 104 ft (31.6 m) long with a longest span of 99 ft (30.1 m) and a deck 39 ft wide.

Who owns Hygiene RD (cr 10) over St. Vrain Creek?

It is owned by the County Highway Agency.