The Las Vegas Valley is the Large MS4 in southern Nevada. After consulting with local stakeholders, NDOT selected a monitoring site on the Las Vegas Wash at LW11.5. This monitoring site will be co-located with the Clark County Regional Flood Control District’s upstream wet weather monitoring station. This monitoring site will provide information on an area with Nevada’s largest urban population. LW11.5 is located upstream of the waste water discharges. Therefore, LW11.5 only has three flow inputs: urban runoff, shallow groundwater, and storm flows. This reach of the Las Vegas Wash was initially placed on Nevada’s 303(d) List of Impaired Waters for Total Dissolved Solids (TDS), boron, and selenium during the 2008-2010 reporting cycle.
Discharge, gage height, and precipitation data is collected at USGS gaging station 094196783 located approximately 0.2 miles upstream of the Las Vegas Wash monitoring station.
Air temperature and humidity data is collected at the Las Vegas Wash monitoring station.