214010-020-mtn-home-2019-10-31-wfps-report

DocuSign Envelope ID: 1DD36D19-77D0-4780-B72C-98AC28C4B145
Mountain Home Water Facilities Planning Study Update October 2019
3.14 ENERGY AUDIT
Keller Associates performed a professional energy audit for the City in August of 2016. The audit
included an evaluation of the existing systems. Most of the wells were in good condition, equipped with
NEMA premium efficiency motors, and were tied into the City’s SCADA system. The report did note
several deficiencies and recommendation for improving energy efficiency in the system. The complete
audit can be found in Appendix M.
Well 12 was reported to give erroneous SCADA data, was equipped with an obsolete control panel, and
had an inefficient pump and motor. This ties into the recommended alternative to address Well 12’s
condition in section 4. Well 13 was also recommended to be replaced with a premium efficiency motor.
Other recommendations including LED lighting to reduce energy costs at all wells and booster stations,
and to operate the lowest energy intensive wells (wells 9, 12, 14, and 16) most often to cover the
system’s needs and be cost efficient. Well 15 is equipped with a VFD, but the wells that pump into
systems with tanks are set to constant speed and operate near the maximum efficiency point of the
pump curve in order to fill the tanks. The wells that pump into systems serviced by tanks are not expected
to receive benefit from switching to a VFD. The pumps that serve the City’s closed systems, like the
Medium Pressure Zone, are already equipped with VFDs.
4.0 RECOMMENDATIONS AND CAPITAL IMPROVEMENT PLAN
4.1 GENERAL
This section provides a summary of the recommendations selected from the alternatives presented in
Chapter 3. A capital improvement plan, which reflects opinions of probable costs for the
recommendations and an order of priority, is also presented.
4.2 RECOMMENDATIONS FROM SELECTED ALTERNATIVES
Because of the City’s commitment to provide a reliable water supply and fire flow to the potable system
users, the no-action alternatives are not considered as viable options. Table 4.1 summarizes all of the
alternatives considered and the recommended actions.
CITY OF MOUNTAIN HOME | KA 214010-020 28