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What is the Wash?
Invasive Species Management

Management programs

Tall Whitetop Management Activities

The tall whitetop management program for the Lower Las Vegas Wash began in fall 2002 with biannual treatments occurring each spring and fall. National Park Service Exotic Plant Management crews conducted the treatment applications and mapped the infestations with Global Positioning System (GPS) technology. Today, a contractor continues treatments biannually to prevent re-sprouting downstream.

tall whitetop
Tall whitetop (Lepidium latifolium)

By controlling tall whitetop in the Las Vegas Valley Watershed, we are preventing the Las Vegas Wash, Lake Mead and the lower Colorado River System from further degradation.

Giant Reed Management Activities

Since inception, 40 stands of giant reed had been identified in the Wash, all of which were removed and mapped using GPS technology. At the end of 2011, a new stand was identified and is in the process of removal.

Tamarisk Management Activities

As of spring 2012, approximately 1,300 acres of tamarisk have been cleared within Clark County Wetlands Park by both the Las Vegas Wash Coordination Committee and adjacent home developers.

Las Vegas Wash Project Coordination Team • 100 City Parkway, Suite 700 • Las Vegas, NV 89106 • (702) 822-3300