Final answer:
Elephant Butte Reservoir and Conchas Lake are located in New Mexico, serving important purposes for irrigation, flood control, and recreation, similar to historical water management by Chacoans in Chaco Canyon.
Step-by-step explanation:
The Elephant Butte Reservoir and Conchas Lake are both located in the state of New Mexico. Elephant Butte Reservoir is famous not only as a recreation area but also for its role in irrigation and flood control. Conchas Lake, on the other hand, is also a popular recreational spot offering various water sports and activities.
Both reservoirs are crucial for water management in the arid landscape of New Mexico, much like the historical efforts of the Chacoans in Chaco Canyon who ingeniously managed water to grow crops in the desert.