Question: What was the length, in the 1980's, of the river John J Conway used as a source of water for the settlers to whom he sold land ?
Sentence (from "John J. Conway"): Subdivided parcels were sold to arriving settlers and water was pumped from the Rio Grande by means of a pumping station called the First Lift Station and distributed to the residents of the Rio Grande Valley through the Mission Canal Co.
Relevant evidence: Yes