Hydraulic Model 2020
The Truckee Sanitary District (District) is responsible for the collection and conveyance of
wastewater within the greater Truckee area. The District's collection system is separated into
four major basins: Martis Valley, Donner Lake, Tahoe Donner, and Glenshire. Due to license size
restrictions, the District has developed four separate hydraulic models (one for each basin) using
the InfoSewer® wastewater collection system hydraulic modeling software application
developed by Innovyze (formerly MWH Soft). The District has previously completed a model
verification and a capacity analysis on the Martis Valley hydraulic model in 2015. The other three
hydraulic models have been constructed, but no model verification or system analysis tasks have
been completed to date. The District originally asked Carollo to calibrate and analyze the Donner
Lake, Tahoe Donner, and Glenshire basins. The District later requested that Carollo Engineers,
Inc. (Carollo) also update and re-analyze the Martis Valley system.
The objectives of this study were to:
Review the existing Donner Lake, Tahoe Donner, Glenshire, and Martis Valley hydraulic models
Update the hydraulic models based on recommendations developed during the review process
Develop wet weather flow parameters
Analyze historical flow monitoring and rainfall data to ensure the modeled dry and peak wet weather flows are reasonably replicated by the hydraulic models
Identify capacity deficiencies under existing and build-out conditions, based on the updated hydraulic models
Provide recommended improvements to mitigate the capacity deficiencies
Conduct a trigger analysis to help the District track the timing of future system improvements
