US Bridges

US 36 Ml over Deer Trail Creek

Fair

Arapahoe County, Colorado · 11.9 MI E of JCT I 70 · Structure no. F-21-U

Built
1975
50 years old
Condition
Fair
inspected March 2025
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
180 ft
2 main spans
Daily traffic
790
2020 count
Owner
State
State Highway Agency

About this bridge

US 36 Ml over Deer Trail Creek is a prestressed concrete continuous stringer/multi-beam or girder carrying US 36 Ml over Deer Trail Creek in Arapahoe County, Colorado. It was built in 1975, so it is 50 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 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 790 vehicles a day, roughly 42% of them trucks, projected to reach 980 by 2040. The structure is 180 ft (54.9 m) long and 45 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

CarriesUS 36 Ml
CrossesDeer Trail Creek
Location11.9 MI E of JCT I 70
RouteU.S. Route 36D
Coordinates39.74018, -103.98257
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 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 geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating38 US tons
Inventory rating22.7 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length180 ft (54.9 m)
Longest span89 ft (27 m)
Deck width45 ft (13.6 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic790 (2020)
Projected traffic980 by 2040
Trucks42%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.2 mi (18 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 Deer Trail Creek built?

It was built in 1975, making it 50 years old in 2025.

What condition is US 36 Ml over Deer Trail 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 March 2025.

How much traffic does US 36 Ml over Deer Trail Creek carry?

About 790 vehicles per day (2020 count), of which roughly 42% are trucks.

How long is US 36 Ml over Deer Trail Creek?

The structure is 180 ft (54.9 m) long with a longest span of 89 ft (27 m) and a deck 45 ft wide.

Who owns US 36 Ml over Deer Trail Creek?

It is owned by the State Highway Agency.