US Bridges

IRR/US-491 SB over Tocito Wash

Good

San Juan County, New Mexico · 5.9 MI N Road to Toadlena · Structure no. 000000000008044

Built
1980
45 years old
Condition
Good
inspected August 2023
Type
Slab
Concrete Continuous
Length
222 ft
7 main spans
Daily traffic
6,055
2023 count
Owner
State
State Highway Agency

About this bridge

IRR/US-491 SB over Tocito Wash is a concrete continuous slab carrying IRR/US-491 SB over Tocito Wash in San Juan County, New Mexico. It was built in 1980, so it is 45 years old, younger than the New Mexico average of 51.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 6,055 vehicles a day, roughly 17% of them trucks, projected to reach 8,234 by 2043. The structure is 222 ft (67.7 m) long and 47 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesIRR/US-491 SB
CrossesTocito Wash
Location5.9 MI N Road to Toadlena
RouteU.S. Route 491
CountySan Juan County
StateNew Mexico
Coordinates36.418, -108.72133
Functional classRural Principal Arterial - Other

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating74 US tons
Inventory rating44.3 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans7
Design loadHS 20
Structure length222 ft (67.7 m)
Longest span32 ft (9.8 m)
Deck width47 ft (14.3 m)
Roadway width44 ft (13.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,055 (2023)
Projected traffic8,234 by 2043
Trucks17%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkNon-Interstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$766,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was IRR/US-491 SB over Tocito Wash built?

It was built in 1980, making it 45 years old in 2025.

What condition is IRR/US-491 SB over Tocito 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 2023.

How much traffic does IRR/US-491 SB over Tocito Wash carry?

About 6,055 vehicles per day (2023 count), of which roughly 17% are trucks.

How long is IRR/US-491 SB over Tocito Wash?

The structure is 222 ft (67.7 m) long with a longest span of 32 ft (9.8 m) and a deck 47 ft wide.

Who owns IRR/US-491 SB over Tocito Wash?

It is owned by the State Highway Agency.