Debbie Van Dooremolen
Environmental Biologist, Las Vegas Wash Coordination Committee
Henderson, NV
November 19th, 2025
Our group is sitting on a dirt path overlooking the Las Vegas Wash and talking to Debbie Van Dooremolen, a Senior Biologist at the Las Vegas Wash Coordination Committee (LVWCC) and Southern Nevada Water Authority (SNWA). While simultaneously pointing out the many birds calling the wash home, Debbie talks to us about the work the LVWCC (a committee represented by many federal, state, and local agencies) has done in order to protect the river’s human and non-human interests. Before the city existed, the Las Vegas Wash was dry for the majority of the year, however, as Las Vegas grew and started using the dry channel for floodwaters and treated wastewater, the river grew into a permanent stream delivering over 200 million gallons a day into nearby Lake Mead. Las Vegas even struck a deal with the Bureau of Reclamation, the controllers of Lake Mead and by extension the city’s water supply—for every gallon returned to the lake via the Las Vegas Wash, the city could apportion an extra gallon from that lake.
The main problem facing the wash at the turn of the century was erosion as perennial flows initiated channel incision. Debbie described how the large flows would heavily erode the sides and base of the channel, affecting critical floodplain habitat, damaging city infrastructure, and negatively impacting water quality in Lake Mead. As a result, LVWCC began building and maintaining sediment-trapping weirs to aid the river’s water quality and supported the creation of valuable habitat along the river’s bank. Debbie emphasizes that the goal of this habitat creation is not restoration per se, rather she talked about the need to “deal with the conditions that we have now, improve them where we can, so we can get in as much habitat as we can.” Debbie and LVWCC have seen some significant successes, massively reducing sedimentation in the river and restoring habitat for countless animals, including three endangered birds.
by Everett Calhoun
