Addendum to Regional Water Supply Facilities Plan Final Report (April 2011) Page: 5-1
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APRIL 2011
5
Raw Water
ConveyanceSystems
The proposed raw water conveyance
system at each diversion location is a
combination of a weir structure on the
ditch, intake inlet structure, intake
pipes, a wet well, pump stations, raw
water storage basin (RWSB), a side
weir structure, and floodwater detention
basin (FWDB).
Weir Structure
A weir structure on the drainage ditch
was proposed just downstream of each
potential diversion point. The weir
structure regulates the water level
within the ditch to provide a more
steady condition for raw water diversion
under normal operating conditions.
Intake Inlet
An intake inlet structure with screens
was proposed to divert raw water by
gravity via a intake pipe with diameter
of 36 inches to a concrete vault (wet
well). The diverted water first flows
through the intake screens that remove
large objects such as plants and logs.
The proposed inlet structure has a
capacity of 15 MGD.
Wet Well
A concrete vault (wet well) was
proposed for a intake pump station to lift
the raw water to a raw water storage
basin. The wet well has 35 feet in
diameter and 25 feet in depth.Pump Stations
Two pump stations were proposed. The
first pump station lift the raw water from
the proposed wet well to the proposed
RWSB. The second pump station
deliver the raw water within the RWSB
to the proposed water treatment plant
(WTP).
The first pump station (Pump Station I)
consists of two pumps (1 duty and 1
standby). Each has a capacity of 15
mgd.
The second pump station (Pump Station
II) consists of four (3 duty and 1
standby). Each pump has a flow
capacity of 5.5 mgd. Two of the pumps
should be operated with variable drives
(VFD). The proposed discharge pipe
has a diameter of 36 inches.
Raw Water Storage Basin
At project site, a RWDB was proposed
to store raw water (diverted base flows)
from the drainage ditch under normal
operation conditions. The basin was
sized with a 7-day storage at 15 MGD,
which equates to approximately 244
acre-feet of volume. The RWSB willREGIONAL WATER SUPPLY FACILITIES PLAN
5-1
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Civil Systems Engineering, Inc. Addendum to Regional Water Supply Facilities Plan Final Report (April 2011), report, May 2011; Houston, Texas. (https://texashistory.unt.edu/ark:/67531/metapth839161/m1/135/?q=%22~1%22~1: accessed July 16, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.