Section 10 Public Works
Policy 10-4 WATER PUMPING FROM WAURIKA RESERVOIR TO LAKE ELLSWORTH
DISTRIBUTION: Mayor and City Council
SUBJECT: Water Pumping From Waurika Reservoir to Lake Ellsworth
PURPOSE: To achieve maximum yields of water supply from Lake Lawtonka,
and Waurika Reservoir, yet, minimize the amount of pumping required to achieve this goal.
BACKGROUND: Water for treatment and consumption is withdrawn from Lake
the Medicine Park Water Treatment Plant and from Lake Ellsworth and Lake Waurika at the
Southeast Water Treatment Plant. . Lake Ellsworth water is transferred (pumped) to Lake
Lawtonka in accordance with Council Policy 10-2. Waurika Reservoir water can be pumped to
Lake Ellsworth. In order to maintain a lake elevation in Lake Ellsworth which permits pumping
to Lake Lawtonka, pumping from Waurika Reservoir to Lake Ellsworth may be desirable.
Records of the lakes levels indicate that a large rain can result in rises of three to six feet.
from the lake are maximized when levels are balanced to receive runoff from their watersheds.
Pumping also helps achieve optimum use of the Citys Vested Water Rights at all lakes.
PROCEDURES: Pumping will be suspended when the level of Lake Ellsworth
is 7 feet or less
(i.e. at or above elevation 1228.00 feet) below the top of its gates year round. Weather and
watershed conditions will be considered when implementing pumping procedures.
The Public Works/Engineering Director may use discretion in implementing this policy
A. If the watershed is in a saturated condition whereby it
could be fairly and reasonably
assumed that additional rain would result in substantial runoff physically into Lake Ellsworth,
then pumping may be reduced to a minimum in anticipation of favorable natural results.
B. Waurika Reservoir is at an elevation so low that further pumping
will cause damage to the
Such times when the pumping of Waurika Reservoir is necessary to achieve optimum use
Citys Vested Water Rights
APPROVAL DATE: October 14, 2008
EFFECTIVE DATE: November 1, 2008, and will remain in effect until rescinded.
DEPARTMENT: Public Works
John P. Purcell, Jr.
October 14, 2008
(CP 10-4, Amended, 11/01/2008, Prior Text)