US Bridges

US 550 Sbnd Ml over Draw

Fair

La Plata County, Colorado · 2 Mi. North of New Mexico · Structure no. P-05-AI

Built
2008
17 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
151 ft
1 main span
Daily traffic
4,050
2020 count
Owner
State
State Highway Agency

About this bridge

US 550 Sbnd Ml over Draw is a prestressed concrete stringer/multi-beam or girder carrying US 550 Sbnd Ml over Draw in La Plata County, Colorado. It was built in 2008, so it is 17 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 4,050 vehicles a day, roughly 7% of them trucks, projected to reach 5,346 by 2040. The structure is 151 ft (45.9 m) long and 55 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesUS 550 Sbnd Ml
CrossesDraw
Location2 Mi. North of New Mexico
RouteU.S. Route 550A
Coordinates37.02661, -107.87961
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating72.5 US tons
Inventory rating45.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length151 ft (45.9 m)
Longest span148 ft (45.1 m)
Deck width55 ft (16.8 m)
Roadway width52 ft (15.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,050 (2020)
Projected traffic5,346 by 2040
Trucks7%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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 550 Sbnd Ml over Draw built?

It was built in 2008, making it 17 years old in 2025.

What condition is US 550 Sbnd Ml over Draw 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 October 2023.

How much traffic does US 550 Sbnd Ml over Draw carry?

About 4,050 vehicles per day (2020 count), of which roughly 7% are trucks.

How long is US 550 Sbnd Ml over Draw?

The structure is 151 ft (45.9 m) long with a longest span of 148 ft (45.1 m) and a deck 55 ft wide.

Who owns US 550 Sbnd Ml over Draw?

It is owned by the State Highway Agency.