US Bridges

US 36 Ml over Ped Underpath / Creek

Good

Boulder County, Colorado · 28th St/Winding Trail Dr. · Structure no. D-15-BR

Built
2015
10 years old
Condition
Good
inspected August 2023
Type
Culvert
Concrete
Length
34 ft
2 main spans
Daily traffic
16,000
2020 count
Owner
State
State Highway Agency

About this bridge

US 36 Ml over Ped Underpath / Creek is a concrete culvert carrying US 36 Ml over Ped Underpath / Creek in Boulder County, Colorado. It was built in 2015, so it is 10 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 16,000 vehicles a day, roughly 2% of them trucks, projected to reach 18,240 by 2040. The structure is 34 ft (10.5 m) long and 119 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesUS 36 Ml
CrossesPed Underpath / Creek
Location28th St/Winding Trail Dr.
RouteU.S. Route 36B
Coordinates40.04361, -105.25852
Functional classUrban Minor Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
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 rating48.2 US tons
Inventory rating37.1 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHL 93
Structure length34 ft (10.5 m)
Longest span16 ft (4.9 m)
Deck width119 ft (36.4 m)
Roadway width68 ft (20.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic16,000 (2020)
Projected traffic18,240 by 2040
Trucks2%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 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 US 36 Ml over Ped Underpath / Creek built?

It was built in 2015, making it 10 years old in 2025.

What condition is US 36 Ml over Ped Underpath / 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 August 2023.

How much traffic does US 36 Ml over Ped Underpath / Creek carry?

About 16,000 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is US 36 Ml over Ped Underpath / Creek?

The structure is 34 ft (10.5 m) long with a longest span of 16 ft (4.9 m) and a deck 119 ft wide.

Who owns US 36 Ml over Ped Underpath / Creek?

It is owned by the State Highway Agency.