US Bridges

NM-36 over Knife Hill Canyon

Fair

McKinley County, New Mexico · 4.7 MI S of JCT NM-53 · Structure no. 000000000010019

Built
1990
35 years old
Condition
Fair
inspected August 2023
Type
Culvert
Steel
Length
35 ft
2 main spans
Daily traffic
117
2023 count
Owner
State
State Highway Agency

About this bridge

NM-36 over Knife Hill Canyon is a steel culvert carrying NM-36 over Knife Hill Canyon in McKinley County, New Mexico. It was built in 1990, so it is 35 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 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 117 vehicles a day, roughly 33% of them trucks, projected to reach 159 by 2043. The structure is 35 ft (10.7 m) long. If it were closed, the detour would be 98.8 mi (159 km).

CarriesNM-36
CrossesKnife Hill Canyon
Location4.7 MI S of JCT NM-53
RouteState Highway 36
Coordinates35.05377, -108.67413
Functional classRural Major Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadHS 20
Structure length35 ft (10.7 m)
Longest span15 ft (4.6 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic117 (2023)
Projected traffic159 by 2043
Trucks33%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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 NM-36 over Knife Hill Canyon built?

It was built in 1990, making it 35 years old in 2025.

What condition is NM-36 over Knife Hill Canyon 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 August 2023.

How much traffic does NM-36 over Knife Hill Canyon carry?

About 117 vehicles per day (2023 count), of which roughly 33% are trucks.

How long is NM-36 over Knife Hill Canyon?

The structure is 35 ft (10.7 m) long with a longest span of 15 ft (4.6 m).

Who owns NM-36 over Knife Hill Canyon?

It is owned by the State Highway Agency.