US Bridges

IRR BIA RTE N321 over Crystal Creek

Poor

San Juan County, New Mexico · In Crystal New Mexico · Structure no. 00000000000N616

Built
1940
85 years old
Condition
Poor
inspected March 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
86 ft
4 main spans
Daily traffic
254
2023 count
Owner
Federal
Bureau of Indian Affairs

About this bridge

IRR BIA RTE N321 over Crystal Creek is a wood or timber stringer/multi-beam or girder carrying IRR BIA RTE N321 over Crystal Creek in San Juan County, New Mexico. It was built in 1940, so it is 85 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 poor condition with a lowest component rating of 2 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: open, posting recommended but not legally implemented.

It carries about 254 vehicles a day, roughly 5% of them trucks, projected to reach 297 by 2040. The structure is 86 ft (26.2 m) long and 18 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesIRR BIA RTE N321
CrossesCrystal Creek
LocationIn Crystal New Mexico
RouteFederal Lands Road 0N321
Coordinates36.04372, -108.96733
Functional classRural Minor Arterial

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure2 CriticalAdvanced deterioration of primary structural elements. Bridge may be closed until corrective action is taken.
Substructure2 CriticalAdvanced deterioration of primary structural elements. Bridge may be closed until corrective action is taken.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 2023
Inspection intervalevery 12 months
Operating statusOpen, posting recommended but not legally implemented
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating31.3 US tons
Inventory rating22.7 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans4
Design loadUnknown
Structure length86 ft (26.2 m)
Longest span21 ft (6.5 m)
Deck width18 ft (5.5 m)
Roadway width18 ft (5.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic254 (2023)
Projected traffic297 by 2040
Trucks5%
Lanes on structure2
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerBureau of Indian Affairs
Maintained byBureau of Indian Affairs
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$550,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was IRR BIA RTE N321 over Crystal Creek built?

It was built in 1940, making it 85 years old in 2025.

What condition is IRR BIA RTE N321 over Crystal Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in March 2023.

How much traffic does IRR BIA RTE N321 over Crystal Creek carry?

About 254 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is IRR BIA RTE N321 over Crystal Creek?

The structure is 86 ft (26.2 m) long with a longest span of 21 ft (6.5 m) and a deck 18 ft wide.

Who owns IRR BIA RTE N321 over Crystal Creek?

It is owned by the Bureau of Indian Affairs.