Working to stabilize and enhance the valuable environmental resources of the Las Vegas Wash The Las Vegas Wash: A multi- agency stakeholder process to protect and enhance a key ecological and hydrologic resource SER-Southwest November 10, 2016 Jason R Eckberg
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Working to stabilize and enhance the valuable
environmental resources of the Las Vegas Wash
The Las Vegas Wash: A multi-agency stakeholder process to
protect and enhance a key ecological and hydrologic resource
SER-SouthwestNovember 10, 2016
Jason R Eckberg
Water Flowing into Lake Mead0.81%
0.26%
2.16%
96.77%
Virgin River
Muddy River
Las Vegas Wash
Colorado River
Las Vegas Wash
Primary drainage channel for ~1600 sq. mile Las Vegas Valley watershed: Discharges urban flows and storm run-off to Lake
Mead (~200 MGD) Return-flow conveyance
Once ephemeral; perennial since the1950s Increasing flows created wetlands, but then
incised the channel and eroded them away Increased sediment flow and nutrient discharge
caused water quality concerns in Lake Mead
Las Vegas Wash Coordination Committee (LVWCC)
~30-member stakeholder group formed in 1998 to stabilize and enhance the Las Vegas Wash; SNWA is lead agency
Developed the Comprehensive Adaptive Management Plan (CAMP), with 44 action items, to achieve goals
• Basic Management, Inc.• Bureau of Reclamation• Citizen Members• City of Henderson• City of Las Vegas• City of North Las Vegas• CC Department of Air Quality &
Environmental Management• CC Parks and Recreation• CC Regional Flood Control District• CC Water Reclamation District• Colorado River Commission• Conservation District of Southern
Nevada • Desert Wetlands Conservancy• Lake Las Vegas Resort
• Las Vegas Boat Harbor• National Park Service• Natural Resources Conservation
Service• NV Department of Wildlife• NV Division of Environmental
Protection• NV State Health Division• Southern Nevada Health District• Southern Nevada Water Authority• U.S. Army Corps of Engineers• U.S. Environmental Protection
Agency• U.S. Fish & Wildlife Service• U.S. Geological Survey• University of Nevada, Las Vegas
LVWCC Community Partnership
The Comprehensive Adaptive Management Plan (CAMP) 44 Action items across 9 categories
Biological Monitoring Local Oversight Water Quality Monitoring Grade Control Structures Bank Protection Administration Environmental Compliance Outreach and Education Revegetation
Key 1st step - Channel Stabilization
Impede channel down-cutting
Reduce stream bank erosion
Balance sediment transport
Help restore ecosystem functions
Pabco
Historic LateralExpansion
Bostick
DemonstrationWeir
RainbowGardens
Upper Diversion Fire Station
Completed 1999-2016
Las Vegas WashClark County AWT to Lake Las Vegas
VisitorCenter
Monson Powerline
DU #1 Calico
DU #2
Three Kids
Duck CreekConfluence
Lower Narrows
Homestead
Archery
Silverbowl
Upper Narrows
Tropicana
Future Design and Construction
Sunrise
19* of 21 erosion control structures (weirs) completed* Historic Lateral Expansion enhances a previously completed weir
Channel Bed Stabilization
Stabilization Achievements
19 of 21 weirs complete
>12 miles of Wash banks stabilized 21st century recycling
Rock riprap from imploded casinos Showboat, El Rancho,
Stardust and more
Revegetation Mitigation required post erosion control
construction Opportunities for habitat improvement
Restore/create wetlands and riparian zones Reduce bank erosion