Las Vegas Wash

Historically, Las Vegas Wash remained dry for most of the year, until the Las Vegas Valley diverted urban runoff and reclaimed wastewater through the wash to Lake Mead, Arizona. This perennial source of water created approximately 2,000 acres of wetlands by the 1970's. However, the artificial flow combined with periodic flood events increased erosion, which created large cut banks, diminished many of the wetlands, promoted the advancement of non-native weeds, and washed large amounts of sediment into Lake Mead. In order to mitigate some of these effects, Fred Phillips Consulting (FPC) developed the "Las Vegas Wash Revegetation Master Plan" for the Southern Nevada Water Authority (SNWA) to serve as a template for upland, riparian and wetland revegetation activities in the wash. In the plan, sites along the wash are ranked based on revegetation priority and feasibility in descriptive and GIS format. This plan outlines and details the necessary steps to successful revegetation projects, from project compliance planning to revegetation project monitoring and maintenance. Included in the master plan is a detailed revegetation plan for the 67-acre riparian and upland pilot revegetation site, including environmental compliance planning, site assessment plan and revegetation design. The regulation design includes a planting matrix and detailed maps, planting implementation, irrigation design and project monitoring and maintenance. Since the master plan's completion, FPC has created wetland, riparian and upland revegetation designs and layouts as well as project management for two more revegetation sites along the Las Vegas Wash. SNWA has utilized this master plan to revegetate more than 90 acres of wetland, riparian and upland habitat along the wash.