US Bridges

County Road 94 over Lefthand Creek

Fair

Boulder County, Colorado · 0.1 MI N of Olde Stage RD · Structure no. BC-94-2.3-LT

Built
2019
6 years old
Condition
Fair
inspected February 2025
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
73 ft
1 main span
Daily traffic
1,441
2023 count
Owner
County
County Highway Agency

About this bridge

County Road 94 over Lefthand Creek is a prestressed concrete box beam or girders - multiple carrying County Road 94 over Lefthand Creek in Boulder County, Colorado. It was built in 2019, so it is 6 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 1,441 vehicles a day, roughly 14% of them trucks, projected to reach 1,729 by 2043. The structure is 73 ft (22.3 m) long and 35 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

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CarriesCounty Road 94
CrossesLefthand Creek
Location0.1 MI N of Olde Stage RD
RouteCounty Highway 0
CountyBoulder County
StateColorado
Coordinates40.11509, -105.30777
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
Deck8 Very GoodNo problems noted.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 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 geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating46.4 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHL 93
Structure length73 ft (22.3 m)
Longest span67 ft (20.4 m)
Deck width35 ft (10.7 m)
Roadway width35 ft (10.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,441 (2023)
Projected traffic1,729 by 2043
Trucks14%
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 94 over Lefthand Creek built?

It was built in 2019, making it 6 years old in 2025.

What condition is County Road 94 over Lefthand 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 County Road 94 over Lefthand Creek carry?

About 1,441 vehicles per day (2023 count), of which roughly 14% are trucks.

How long is County Road 94 over Lefthand Creek?

The structure is 73 ft (22.3 m) long with a longest span of 67 ft (20.4 m) and a deck 35 ft wide.

Who owns County Road 94 over Lefthand Creek?

It is owned by the County Highway Agency.