HomeMy WebLinkAboutPurissima Hills Water District (4)TOWN OF LOS ALTOS HILLS May 6, 1999
Staff Report to the City Council
RE: REQUEST FROM PURISSIMA HILLS WATER DISTRICT FOR
EASEMENT ON TOWN LAND FOR INSTALLATION OF WATER
WELL
FROM: Curtis S. Williams, Planning Director
RECOMMENDATION: That the City Council:
Direct the Water District to work with Town staff to prepare temporary and permanent
easements for installation of the water well at the Town Hall property.
DISCUSSION
The Purissima Hills Water District (PHWD) has been seeking a source of water to use in
the event of an emergency water shortage, and has determined that a well on the Town
Hall property may have the potential for delivering 300 gallons per minute of water, and
has the added advantage of being in close proximity to an existing water main and to the
District's water tanks on Ascension Drive. The City Manager and Planning Director
have met with Water District staff and have determined that a location behind the Town's
emergency generator and dumpster enclosure would work for the District with very
minimal impact on Town Hall operations, at present or in the event of future expansion of
Town Hall.
The District has provided a letter request and plans (attached) for temporary and
permanent utility easements behind the Town's equipment enclosure. The temporary
easement would be for construction and initial testing purposes, while the permanent
easement would provide for installation and continued access for maintenance purposes.
The permanent easement would be 62 feet long by 15 feet wide. As shown on the plans,
the equipment would include a small pad with piping and valves which extend only a
couple of feet above ground level, and an electrical panel. The pump would be located
below ground level and there would be no noise from the equipment. A chain link fence
with redwood slats would be provided around the District equipment. There is an existing
solid fence between the Town's equipment and the neighboring property, so there should
be no impact on the neighbors. The District has requested both temporary and
permanent easements because the testing process and equipment would be an expensive
investment and they wish to be sure that, if the well is viable, an easement will be granted
by the Town. If the well is determined not to be viable, then the permanent easement
would not become effective.
Council Action
Staff requests that the Council provide direction regarding this item. If the concept is
acceptable, then the District and the Town, at the District's expense, would proceed to
prepare the necessary easement language and would return to Council at a future date for
final approval. If the concept is not acceptable, the District will pursue other options. If
additional information is needed, the item may be postponed to allow time for the District
and/or Town staff to provide the requested information.
May 6, 1999: Purissima Hills Water District
Page 2
Staff is available to respond to questions from the Council or the public.
Attachment
April 16, 1999 Letter and Plans from Purissima Hills Water District
cc: Patrick D. Walter, General Manager
Purissima Hills Water District
26375 Fremont Road
Los Altos Hills, CA 94022
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26375 Fremont Road Tel (650) 948-1217
Los Altos Hills, CA 94022 Fax (650) 948-0961
Purissima Hills
Water District
April 16, 1999
Mr. Jeff Peterson, Manager
Town of Los Altos Hills
23679 Fremont Road
Los Altos Hills, California 94022
Dear Jeff.
As previously discussed, we are requesting permission to dig a well on Town
property in a location near the generator. The drilling operation for a test well will take
approximately two to three weeks and, if productive, a permanent production well may be
drilled. As a necessary prerequisite, the District will require both a temporary and a
permanent easement prior to test drilling. If the test well does not meet expectations, the
permanent easement would be void.
Geoconsultants, Inc., a firm specializing in the exploration and development of
groundwater resources, has explored alternative well sites in an aquifer which runs along
Foothill Expressway. Geoconsultants has used a method known as electrotelluric
soundings to electronically model fifteen possible sites. The site near your generator
shows a potential for 300 gallons per minute and is an excellent site due to the proximity
of our tanks on Ascension Drive. The benefit of this location gives us the ability to pump
directly into our tanks and allows us to either blend or treat the water before we serve our
customers. While we have no plans to include this well in our normal operation, we
anticipate supplying the community with emergency water during an extended outage.
I look forward to discussing this matter further with you and to answer any
questions you or the Councilmembers may have.
PDW:Iex
Si r 1y,
atrick D. W •te
General Manager
Service To The Hills Since 1955
CHAIN LINK FENCE W/CHEMICAL FEED REDWOOD FENCE
REDWOOD SLATS (NEW) —7%— & STORAGE (EXIST.)
27' _
(TEMP. EASEMENT)T
i
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TEMPORARY
LO I CONSTRUCTION o WELL
EASEMENT (SEE SHT. 2)
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ELECTRICAL
PANEL
(EXIST) D
ELECTRICAL
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62'
PERM. EASEMENT) f^—'
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x x x I w
PERMANENT Q
EASEMENT ----�
o s �
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6" DUCTILE IRON PIPE
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STORM DRAIN I 00
STANDBY (EXIST.)
I
GENERATOR
Di' (EXIST.)
PROPANE TANK
(EXIST.)
0 0 0 0 0
CHAIN LINK FENCE W/REDWOOD SLATS (EXIST.)
PARKING LOT
SITE PLAN - PRELIMINARY
SCALE: 1" = 10'
EASEMENT
10' (EXIST.)
DESIGN: DRAWN: 801331
.H & B Engineers By PGH By eH ADB NO. PURISSIMA HILLS WATER DISTRICT EMERGENCY WATER SUPPLY WELL SHEET �
Los Altos and San Mateo, California CKD PGH CKD PGH 4/99 SANTA CLARA COUNTY, CALIFORNIA LOS ALTOS HILLS TOWN HALL SITE OF 2
D ATE
0 14'-0"
NOTE:
SEE SHEET 1
WELL PLAN
3/8"-1 P -0j,
6"x6" WELL HEAD
SCREENED &
INVERTED CASING
VENT, 2" MIN. DIA.
AIR RELEASE VALVE
PRESSURE GAGE
SAMPLE TAP
FLOW METER
/6" CHECK VALVE
CHEMICAL INJECTORS
(1—CHLORINE)
(1—SPARE)
6" GATE VALVE
6" FCA
fr�i t ter rl— r 6" D I P
SLOPE= 1/4"/1
�. CASING
GROUT SEAL
SECTION A
3/8"=1'-0"
DESIGN: DRAWN: 80131
,IDB No. EMERGENCY WATER SUPPLY WELL SHEET 2
H � B �'�2g272�G'i'"S ey PGH By eH PURISSIMA HILLS WATER DISTRICT
Los Altos and San Mateo, California CKD PGH CKD PGH 4/99 SANTA CLARA COUNTY, CALIFORNIA LOS ALTOS HILLS TOWN HALL SITE OF 2
DATE