US Bridges

SH 112 Ml over Rio Grande Canal

Fair

Rio Grande County, Colorado · 1.7 MI NE of JCT US 160 · Structure no. N-11-C

Built
1947
78 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
56 ft
1 main span
Daily traffic
1,800
2020 count
Owner
State
State Highway Agency

About this bridge

SH 112 Ml over Rio Grande Canal is a steel stringer/multi-beam or girder carrying SH 112 Ml over Rio Grande Canal in Rio Grande County, Colorado. It was built in 1947, so it is 78 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 1,800 vehicles a day, roughly 13% of them trucks, projected to reach 2,088 by 2040. The structure is 56 ft (17.1 m) long and 31 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesSH 112 Ml
CrossesRio Grande Canal
Location1.7 MI NE of JCT US 160
RouteState Highway 112A
CountyRio Grande County
StateColorado
Coordinates37.69733, -106.33476
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating29.8 US tons
Inventory rating17.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length56 ft (17.1 m)
Longest span52 ft (15.8 m)
Deck width31 ft (9.4 m)
Roadway width25 ft (7.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,800 (2020)
Projected traffic2,088 by 2040
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$94,000
NavigationNo navigation control on waterway

Frequently asked questions

When was SH 112 Ml over Rio Grande Canal built?

It was built in 1947, making it 78 years old in 2025.

What condition is SH 112 Ml over Rio Grande Canal 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 2023.

How much traffic does SH 112 Ml over Rio Grande Canal carry?

About 1,800 vehicles per day (2020 count), of which roughly 13% are trucks.

How long is SH 112 Ml over Rio Grande Canal?

The structure is 56 ft (17.1 m) long with a longest span of 52 ft (15.8 m) and a deck 31 ft wide.

Who owns SH 112 Ml over Rio Grande Canal?

It is owned by the State Highway Agency.