US Bridges

US 350 Ml over Seasonal Wash

Good

Otero County, Colorado · 0.4 Miles NE of Timpas · Structure no. M-21-IA

Built
2023
2 years old
Condition
Good
inspected August 2024
Type
Culvert
Aluminum, Wrought Iron, or Cast Iron
Length
66 ft
2 main spans
Daily traffic
440
2020 count
Owner
State
State Highway Agency

About this bridge

US 350 Ml over Seasonal Wash is a aluminum, wrought iron, or cast iron culvert carrying US 350 Ml over Seasonal Wash in Otero County, Colorado. It was built in 2023, so it is 2 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 440 vehicles a day, roughly 18% of them trucks, projected to reach 625 by 2040. The structure is 66 ft (20.2 m) long and 62 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesUS 350 Ml
CrossesSeasonal Wash
Location0.4 Miles NE of Timpas
RouteU.S. Route 350A
Coordinates37.82285, -103.76943
Functional classRural 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 protection8 Very GoodNo problems noted.
Culvert8 Very GoodNo problems noted.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59 US tons
Inventory rating45.3 US tons

Structure

Structure typeCulvert
MaterialAluminum, Wrought Iron, or Cast Iron
DeckNot applicable
Main spans2
Design loadHL 93
Structure length66 ft (20.2 m)
Longest span31 ft (9.3 m)
Deck width62 ft (18.9 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic440 (2020)
Projected traffic625 by 2040
Trucks18%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 350 Ml over Seasonal Wash built?

It was built in 2023, making it 2 years old in 2025.

What condition is US 350 Ml over Seasonal Wash 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 2024.

How much traffic does US 350 Ml over Seasonal Wash carry?

About 440 vehicles per day (2020 count), of which roughly 18% are trucks.

How long is US 350 Ml over Seasonal Wash?

The structure is 66 ft (20.2 m) long with a longest span of 31 ft (9.3 m) and a deck 62 ft wide.

Who owns US 350 Ml over Seasonal Wash?

It is owned by the State Highway Agency.