US Bridges

County Road 96 over South St. Vrain Creek

Fair

Boulder County, Colorado · 100 Feet West of State Hi · Structure no. BC-96-0.1-SSV1

Built
2000
25 years old
Condition
Fair
inspected January 2025
Type
Stringer/Multi-beam or Girder
Steel
Length
25 ft
1 main span
Daily traffic
64
2023 count
Owner
County
County Highway Agency

About this bridge

County Road 96 over South St. Vrain Creek is a steel stringer/multi-beam or girder carrying County Road 96 over South St. Vrain Creek 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 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 64 vehicles a day, roughly 12% of them trucks, projected to reach 77 by 2043. The structure is 25 ft (7.6 m) long and 20 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesCounty Road 96
CrossesSouth St. Vrain Creek
Location100 Feet West of State Hi
RouteCounty Highway 0
CountyBoulder County
StateColorado
Coordinates40.10538, -105.48755
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJanuary 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating65.6 US tons
Inventory rating39.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHS 20
Structure length25 ft (7.6 m)
Longest span20 ft (6.2 m)
Deck width20 ft (6.1 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic64 (2023)
Projected traffic77 by 2043
Trucks12%
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 County Road 96 over South St. Vrain Creek built?

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

What condition is County Road 96 over South 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 County Road 96 over South St. Vrain Creek carry?

About 64 vehicles per day (2023 count), of which roughly 12% are trucks.

How long is County Road 96 over South St. Vrain Creek?

The structure is 25 ft (7.6 m) long with a longest span of 20 ft (6.2 m) and a deck 20 ft wide.

Who owns County Road 96 over South St. Vrain Creek?

It is owned by the County Highway Agency.