US Bridges

SH 119 Ml over Middle Boulder Creek

Fair

Boulder County, Colorado · In Nederland · Structure no. E-14-AR

Built
1933
92 years old, rebuilt 1987
Condition
Fair
inspected August 2023
Type
Culvert
Concrete
Length
31 ft
2 main spans
Daily traffic
5,800
2020 count
Owner
State
State Highway Agency

About this bridge

SH 119 Ml over Middle Boulder Creek is a concrete culvert carrying SH 119 Ml over Middle Boulder Creek in Boulder County, Colorado. It was built in 1933 and reconstructed in 1987, so it is 92 years old, older 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 5,800 vehicles a day, roughly 2% of them trucks, projected to reach 6,554 by 2040. The structure is 31 ft (9.4 m) long and 54 ft wide. If it were closed, the detour would be 49.1 mi (79 km).

CarriesSH 119 Ml
CrossesMiddle Boulder Creek
LocationIn Nederland
RouteState Highway 119A
Coordinates39.96147, -105.5105
Functional classRural Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2023
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
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating99 US tons
Inventory rating99 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadH 15
Structure length31 ft (9.4 m)
Longest span15 ft (4.5 m)
Deck width54 ft (16.5 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,800 (2020)
Projected traffic6,554 by 2040
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed49.1 mi (79 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 SH 119 Ml over Middle Boulder Creek built?

It was built in 1933, making it 92 years old in 2025. It was reconstructed in 1987.

What condition is SH 119 Ml over Middle 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 August 2023.

How much traffic does SH 119 Ml over Middle Boulder Creek carry?

About 5,800 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is SH 119 Ml over Middle Boulder Creek?

The structure is 31 ft (9.4 m) long with a longest span of 15 ft (4.5 m) and a deck 54 ft wide.

Who owns SH 119 Ml over Middle Boulder Creek?

It is owned by the State Highway Agency.