US Bridges

County Road 124E over North Boulder Creek

Fair

Boulder County, Colorado · 0.1 MI NE of ST HWY 7 · Structure no. BC-124E-0.1-NB1

Built
1994
31 years old
Condition
Fair
inspected January 2025
Type
Frame
Concrete
Length
30 ft
1 main span
Daily traffic
214
2023 count
Owner
County
County Highway Agency

About this bridge

County Road 124E over North Boulder Creek is a concrete frame carrying County Road 124E over North Boulder Creek in Boulder County, Colorado. It was built in 1994, so it is 31 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 5 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 214 vehicles a day, roughly 22% of them trucks, projected to reach 257 by 2043. The structure is 30 ft (9 m) long and 30 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesCounty Road 124E
CrossesNorth Boulder Creek
Location0.1 MI NE of ST HWY 7
RouteCounty Highway 0
CountyBoulder County
StateColorado
Coordinates39.98809, -105.49551
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
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 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 adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating84.5 US tons
Inventory rating50.7 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckOther
Main spans1
Design loadHS 20
Structure length30 ft (9 m)
Longest span28 ft (8.5 m)
Deck width30 ft (9.2 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic214 (2023)
Projected traffic257 by 2043
Trucks22%
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was County Road 124E over North Boulder Creek built?

It was built in 1994, making it 31 years old in 2025.

What condition is County Road 124E over North Boulder 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 124E over North Boulder Creek carry?

About 214 vehicles per day (2023 count), of which roughly 22% are trucks.

How long is County Road 124E over North Boulder Creek?

The structure is 30 ft (9 m) long with a longest span of 28 ft (8.5 m) and a deck 30 ft wide.

Who owns County Road 124E over North Boulder Creek?

It is owned by the County Highway Agency.