US Bridges

SH 149 Ml over North Fork Rio Grande

Fair

Rio Grande County, Colorado · 0.9 MI NW of JCT US 160 · Structure no. N-10-W

Built
1993
32 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
317 ft
3 main spans
Daily traffic
1,900
2020 count
Owner
State
State Highway Agency

About this bridge

SH 149 Ml over North Fork Rio Grande is a prestressed concrete continuous stringer/multi-beam or girder carrying SH 149 Ml over North Fork Rio Grande in Rio Grande County, Colorado. It was built in 1993, so it is 32 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 1,900 vehicles a day, roughly 5% of them trucks, projected to reach 2,090 by 2040. The structure is 317 ft (96.5 m) long and 43 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesSH 149 Ml
CrossesNorth Fork Rio Grande
Location0.9 MI NW of JCT US 160
RouteState Highway 149A
Coordinates37.67577, -106.65285
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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 rating72.3 US tons
Inventory rating39.5 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length317 ft (96.5 m)
Longest span105 ft (32.1 m)
Deck width43 ft (13 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,900 (2020)
Projected traffic2,090 by 2040
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 149 Ml over North Fork Rio Grande built?

It was built in 1993, making it 32 years old in 2025.

What condition is SH 149 Ml over North Fork Rio Grande 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 September 2023.

How much traffic does SH 149 Ml over North Fork Rio Grande carry?

About 1,900 vehicles per day (2020 count), of which roughly 5% are trucks.

How long is SH 149 Ml over North Fork Rio Grande?

The structure is 317 ft (96.5 m) long with a longest span of 105 ft (32.1 m) and a deck 43 ft wide.

Who owns SH 149 Ml over North Fork Rio Grande?

It is owned by the State Highway Agency.