US Bridges

N. 119th ST (cr 3) over St. Vrain Creek

Good

Boulder County, Colorado · 0.5 MI N of CO RD 20 · Structure no. BC-3-7.5-SV1

Built
1988
37 years old
Condition
Good
inspected February 2025
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
127 ft
2 main spans
Daily traffic
3,288
2023 count
Owner
County
County Highway Agency

About this bridge

N. 119th ST (cr 3) over St. Vrain Creek is a steel continuous stringer/multi-beam or girder carrying N. 119th ST (cr 3) over St. Vrain Creek in Boulder County, Colorado. It was built in 1988, so it is 37 years old, younger than the Colorado average of 42.2 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 3,288 vehicles a day, roughly 12% of them trucks, projected to reach 3,946 by 2043. The structure is 127 ft (38.7 m) long and 39 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesN. 119th ST (cr 3)
CrossesSt. Vrain Creek
Location0.5 MI N of CO RD 20
RouteCounty Highway 0
CountyBoulder County
StateColorado
Coordinates40.15274, -105.07419
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating35.7 US tons
Inventory rating21.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length127 ft (38.7 m)
Longest span59 ft (18.1 m)
Deck width39 ft (11.8 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,288 (2023)
Projected traffic3,946 by 2043
Trucks12%
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 N. 119th ST (cr 3) over St. Vrain Creek built?

It was built in 1988, making it 37 years old in 2025.

What condition is N. 119th ST (cr 3) over St. Vrain Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in February 2025.

How much traffic does N. 119th ST (cr 3) over St. Vrain Creek carry?

About 3,288 vehicles per day (2023 count), of which roughly 12% are trucks.

How long is N. 119th ST (cr 3) over St. Vrain Creek?

The structure is 127 ft (38.7 m) long with a longest span of 59 ft (18.1 m) and a deck 39 ft wide.

Who owns N. 119th ST (cr 3) over St. Vrain Creek?

It is owned by the County Highway Agency.