US Bridges

NM-605 over Arroyo Del Puerto

Fair

McKinley County, New Mexico · 12.6 MI N of JCT NM-122 · Structure no. 000000000005817

Built
1957
68 years old, rebuilt 1979
Condition
Fair
inspected September 2023
Type
Channel Beam
Concrete
Length
127 ft
5 main spans
Daily traffic
2,527
2023 count
Owner
State
State Highway Agency

About this bridge

NM-605 over Arroyo Del Puerto is a concrete channel beam carrying NM-605 over Arroyo Del Puerto in McKinley County, New Mexico. It was built in 1957 and reconstructed in 1979, so it is 68 years old, older 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 5 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 2,527 vehicles a day, roughly 5% of them trucks, projected to reach 3,436 by 2043. The structure is 127 ft (38.7 m) long and 55 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesNM-605
CrossesArroyo Del Puerto
Location12.6 MI N of JCT NM-122
RouteState Highway 605
CountyMcKinley County
StateNew Mexico
Coordinates35.33922, -107.79426
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.4 US tons
Inventory rating35.6 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans5
Design loadHS 20
Structure length127 ft (38.7 m)
Longest span25 ft (7.6 m)
Deck width55 ft (16.8 m)
Roadway width52 ft (15.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,527 (2023)
Projected traffic3,436 by 2043
Trucks5%
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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$481,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was NM-605 over Arroyo Del Puerto built?

It was built in 1957, making it 68 years old in 2025. It was reconstructed in 1979.

What condition is NM-605 over Arroyo Del Puerto 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 NM-605 over Arroyo Del Puerto carry?

About 2,527 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is NM-605 over Arroyo Del Puerto?

The structure is 127 ft (38.7 m) long with a longest span of 25 ft (7.6 m) and a deck 55 ft wide.

Who owns NM-605 over Arroyo Del Puerto?

It is owned by the State Highway Agency.