Orgill, Danielle

Danielle Orgill is a professional engineer in Reno, Nevada with experience in water, wastewater, and stormwater hydraulic modeling, infrastructure...

Titles from this speaker

Quantifying the Impact of Rain on Snow on the South Lake Tahoe Collection System

Abstract

The South Tahoe Public Utility District (District) owns and operates the wastewater collection and treatment system that serves the City of South Lake Tahoe and unincorporated areas of El Dorado County within the Lake Tahoe Basin. The District, along with many other utilities in the Lake Tahoe area, experienced significant rain-on-snow events during the 2017 winter, where warmer rain fell on the existing snowpack causing additional runoff from snow melt. For the District, this led to instantaneous peak flows at the wastewater treatment plant (WWTP) with some pump stations that exhibited peak flows eight times higher than normal. The estimated cost to collect, treat, and pump this additional stormwater flow was $600,000. Figure 1 shows the headworks flow at the WWTP for the 2016-17 winter (in red) compared to previous years. These rain-on-snow events prompted the District to implement a permanent flow monitoring program, which began in December 2017.

SpeakerOrgill, Danielle

Presentation time

14:00:00

14:30:00

Session time

11:30:00

12:30:00

SessionInflow/Infiltration: Fighting the I/I

Session number7D

TopicCollection Systems, Watershed Management, Water Quality, and Groundwater

Author(s)

R. OrgillD. OrgillT. LoperS. Caswell