US Bridges

CORD94(LH Cnyn Rd) over Lefthand Creek

Good

Boulder County, Colorado · 0.6 Miles West of Oldstag · Structure no. BC-94-11.7-LTA

Built
2016
9 years old
Condition
Good
inspected January 2025
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
60 ft
1 main span
Daily traffic
1,681
2023 count
Owner
County
County Highway Agency

About this bridge

CORD94(LH Cnyn Rd) over Lefthand Creek is a prestressed concrete box beam or girders - multiple carrying CORD94(LH Cnyn Rd) over Lefthand Creek in Boulder County, Colorado. It was built in 2016, so it is 9 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 1,681 vehicles a day, roughly 16% of them trucks, projected to reach 2,018 by 2043. The structure is 60 ft (18.3 m) long and 35 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesCORD94(LH Cnyn Rd)
CrossesLefthand Creek
Location0.6 Miles West of Oldstag
RouteCounty Highway 0
Coordinates40.10972, -105.31694
Functional classRural Major Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
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 geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating97.1 US tons
Inventory rating75 US tons

Structure

MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHL 93
Structure length60 ft (18.3 m)
Longest span52 ft (15.8 m)
Deck width35 ft (10.6 m)
Roadway width34 ft (10.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,681 (2023)
Projected traffic2,018 by 2043
Trucks16%
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 CORD94(LH Cnyn Rd) over Lefthand Creek built?

It was built in 2016, making it 9 years old in 2025.

What condition is CORD94(LH Cnyn Rd) over Lefthand 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 January 2025.

How much traffic does CORD94(LH Cnyn Rd) over Lefthand Creek carry?

About 1,681 vehicles per day (2023 count), of which roughly 16% are trucks.

How long is CORD94(LH Cnyn Rd) over Lefthand Creek?

The structure is 60 ft (18.3 m) long with a longest span of 52 ft (15.8 m) and a deck 35 ft wide.

Who owns CORD94(LH Cnyn Rd) over Lefthand Creek?

It is owned by the County Highway Agency.