20181127ABAgenda Briefing
November 27, 2018
Agenda Item 1.
Call to order/roll call
Agenda Item 2.
Questions about items listed on the Regular Meeting
Agenda.
Agenda Item 3.
Discussion items.
Agenda Item 3a.
Doe Branch Phase 2 Expansion
6
Prosper Flow to UTRWD Doe Branch Water Reclamation Plant
•Town purchased 1.0 MGD in UTRWD Doe Branch WWTP
•Recent average daily flow to UTRWD (10/2017-11/2018) = 0.30 MGD
Maximize
Public Works
Flow to UTRWD
Projected Average Daily
Flow to UTRWD (MGD)
2018 0.30
2019 0.48
2020 0.64
2021 0.81
2022 1.13
Agenda Item 3b.
Lower Pressure Plane Projects
Discussion on Water & Wastewater
Upcoming Projects
November 27, 2018
8
Agenda
•Water –Lower Pressure Plane
•Lower Pressure Plane
Phasing
•Refresher on Elevated
Tanks
•Reasons for the New
Elevated Tank
•UTRWD –Doe Branch Water
Reclamation Plant Phase 2
9
Lower Pressure Plane Phasing 10
11
Water Master Plan –The End Game
Town of Prosper Buildout Water Master Plan CIP
12
Water Master Plan –Lower Pressure Plane End Game
Dedicated Lower Pressure Plane Supply System
Dedicated Pump
Station
42-Inch PipelineDedicated Elevated
Storage
13
Phasing Lower Pressure Plane Supply
Phase 1 –Portion of the 42” Pipeline (20”
Connection), Transfer Valve, and Elevated
Tank. In service by 2020
20-Inch Connection
14
Phasing Lower Pressure Plane Supply
Phase 2 –Complete 42” Pipeline,
Decommission Transfer Valve, and Dedicated
Pump Station. In service by 2023
EST Refresher 15
Why Do I Need Elevated Tanks?16
Why Do I Need the Lower Pressure Plane EST
Now?17
Lower Plane Demands Will Rapidly Increase 18
Year Average Day
(MGD)
Maximum
Day (MGD)
2015 3.00 8.39
2016 3.76 8.65
2017 4.21 8.59
2018*5.07 11.60
*January-September 2018
Town of Prosper Water Demands
3.01 MGD one-year increase (35%) in
maximum day demands!
LPP is Town’s highest growth area
New construction tends to increase
system peaking
Water System Must Meet Average
Demands, Peaks, and Emergency
Needs
The Upper Plane Tanks Have “Extra”
Capacity. Why Can’t These Tanks Work?19
20
Why Can’t the Upper ESTs Continue to Supply the Lower Plane?
Flow from the Upper ESTs Bottle Necks Through 12” Pipelines
Flow Limited in
20-Inch Pipelines
and Competes
Against Flow from
Pump Station
Flow Limited by
12-Inch Pipeline
Risk in Not Meeting Peak Demand or Emergency Flow Through the Smaller Pipelines to Lower
Plane
Lower Pressure Plane EST Helps Meet Peaks and Provides Emergency Flow
Flow from the Upper ESTs in 20” Pipelines is limited and competes against flow from PS
UTRWD –Doe Branch Water Reclamation
Plant Phase 2 21