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Groundwater lmpact Addendum
February 9,2012
Mr. David Wayne Johnson
Department of Community Development
Jefferson County
621 Sheridan Street
Port Townsend, Washington 98368
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DTAft PLEASANT HARBOR MASTER PLANNED REORT SEIS GROI,I\DWATER IMPACT
ADDENDUM, BRTNNON, WASHINCTON
Dear David:
\
This tetter presents an addendum to the dEIS Water Supply and Groundwater Impact Analysis,
Pleasant Harbor Marina and Golf Resofi, Brinnon, Washington prepared by Subsurface Group in
November 2007. This letter has been prepared by the same author as the FEIS report. The previous
report described the basis for and assumptions for the potential groundwater impacts under the
scope of development for the original resort design concept. This report presents the potential
impacts under the new Alternative 2 development proposal asshorvn in Figure I, and compares
those impacts with the Alternative I and No Action alternatives,
The water balance calculations were performed to estimate the pote,ntial impact to the groundwater
resources beneath Black Point; in essence tlrey are performed to estimate the changes in groundwater
recharge to the sea level aquifer. A change in groundwater recharge to the aquifer can be used to
describe the impacts of the resort to the aguifer system. The water balanoe calculations were performed
using climatic data for the area; and calculated the amount of evapo{ranspimtion, runofl and changes in
groundwater recharge based on proposed domestic and irrigation \vater uses. The basis for these
calculations is presented in our November 2QA7 FEIS report. The proposed water use is within the
limitations of the ground and surface water right permits (C2-3M36 and 52-30437) granted by the
Washington State Department of Ecology on June 16,2010.
The proposed development under Altemative 2 is described in the introduction to the SEIS prepared by
you and transmitted to us on December 15,201 I. With respect to groundwater resources, there are feiv
changes in the reso( design as the number of residential units has remained the same. The size of the
inigation area may also be less, but was held constant for our calc.ulations. The proposed amount of
impervious surfaccs has been slightly reduced from 13 to 12 percent. The volume of the irrigation
storage pond has increased, but once the pond is full the storage reserv'oir size has no effect on the water
balanie. The increase in pervious surfaces and a better understandingofthe cdirstruction phasing of the
resoft were incorporated into the original water balanee calculations; these provide an understanding of
the potential impacts to the groundwater resources beneath the resort and Black Point.
Figure 2 presents the results of the recharge calculations. This figure prescnts the cumulative aquifer
recharge on an annual basis during the construction and occupancy ofthe resort. The resort development
BENDERCONSULTINC. LLC
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Letter to Mr. David Wayne Johnson
February 9,2012
PageZ
schedule was based on a possible timeline of construction events and the proposed staging presented in
your December 15,2011 project description. Market and otherfactors may change this timeline;
however, with the resoft components as designed, the ultimate calculated recharge for any stage of the
resort development will be the samE. Figure 2 indicates thatthe exirtJng (No Action) aquifer recharge is
aboutT60acre-feetperyear(shownforyear20l3). Aftercompletionofthereso4aquiferrechargewill
be about 804 acre-feet per year under Alternative 2. As shown in Figure 3, the calculated recharge
under Alternative I was 822 acre-feet per year.
The increase in recharge between the No Action Altemative and Altenratives I and 2 is due to a decrease
in vegetation at the site tlrough construction of roads and buildings. Water from precipitation would
normally have been consumed by existing trees and plants through evaporation and evapotranspiration
processes. As a result of construction of buildings and pavement, runofffronr the irnpervious surfhces is
now routed directly to infiltration. In addition, precipitation can now infiltrate more quickly due to
changes in soil moisture associated rvith inigation of the golf course, The decrease in aquifer recharge
between Alternatives I and 2 is primarily due to the decrease in irnpervious surfaces. However, even
under Alternative 2, aquifer recharge will increase by about 6 percent above existing conditions due to
construction of the resort.
Thank you for the opportunity to be of service. Please call us at (360) 631-5600 if you have any
questions.
Sincerely,
Ssott F. Bender L.H.G,, C.G.W,P
Enclosures Figure l. Alternative 2, Overall Site Plan
Figure 2. Alternative 2, Annual Cumulative Aqrifer Recharge During Resort
Build-out and Completion
Figure 3. Altemative l, Annual Curnulative Aquifer Recharge During Resort
Build-out and Completion
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Supplementary Environmental Impact Statement
Pleasant Harbor Marina and Golf Resort
Statesman Group
Alternative 2
Annual Cumulative Aquifer Recharge
During Resort Build-out and Completion
ProjcctNumber
1026-02
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Supplementary Environmental Impact Statement
Pleasant Harbor Marina and Golf Resort
Statesman Group
Alternative I
Annual Cumulative Aquifer Recharge
During Resort Build-out and Completion
Projeot Number
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SUBSURFACE GROUP LLC
11220 Fleldstone Lane N.E.
Ba,nbddge ,sland, Wast ngton g81 l0
Telr (206) 778-8074 Far (206) 780-5669
MEMORANDUM
To: Tom McDonald
From: Scott Bender
CC: Craig Peclg Carth Mann
Date: February 22,2010
RE: REVISED PLEASANT HARBOR GROI]NDWATER MONITORING
PLAN
This memorandurn presents the groundwater monitoring plan to be used during construction
and operation of the Pleasant Harbor Golf and Marina Resorl. The plan is based on several
meetings and discussions with the Department of Ecology ard Pacfic Groundwater Group.
Groundwater monitoring witl be performed to document lvater qualiry and drawdown
conditions related to the development.
Figure I presents a map of the existing and proposed groundwater monitoring instrumentation.
Two additionalmonitoring wells will be insatlled, labeled M\t/-7 and MW-8 as shown on the
attached map., These will be standard 2-inch diameter monitoring wells completed to a
minimum of l0 feet below the water table. The existing monitoring wells are labeled on the
map MW-2, MW-4, and MW-5. Wells labeled VWP-|, VWP-3, and VWP-6 were
geotechnical borings with vibrating wire piezometers installed in thern to measure
groundwater pressures.
The highest groundwater dernand at the site will be during site development prior to the
construction ofthe central pond. About one month before construction and during this period
dataloggers will be connected to all of the wells at the site, The program will collect
measurements on groundwater pressure and fluid conductivifl, (which can be conelated to
salinity). Dataloggers that record groundrvater pressure will be installed at VWP-1, VWP-3,
MW-5, and VWP-6, Dakloggers that measur€ both gtoundwater pressure and fluid
conductivity (which can be conelated to salinify) will be installed at MW-2, MW-4, MW-7,
and MW-8. These units will record groundwater measurements on a 0.5 hour basis. The
dataloggers will be downloaded every two months during the construction season estimated
from April I to November l, and every three months in the non+onstruction period, estimated
November I to April I when there will be minimal welluse.
During construction, water quality samples will be collected ft'om the two supply wells and
MW-4, MW-7, and MW-8 if an anomalous conductivity trend is observed. The samples will
be sent to a water quality laboratory for analysis of chlonide arrl nitrates,
SUBSURTACE GROUP, LLC sG0601-03
Memorandum to Statesman C;orporation
February 22,2010
Page2
After construction is completed and the occupancy of the resort units commences, all of the
dataloggers will be downloaded quarterly. Water quality samples will be collected from the
supply wells quarterly. This program will be continued for five years or until the resort has
achieved full build-out, whichever is longer; at which time the monitoring plan will be
adjusted based on the results of the prograrn. The data will be transmitted to Ecology for their
review.
Pleasant Harbor will perform a minimum 72-hour aquifer test at each new water supply well
installed for the project. During testing the wells will be sampled for electrical conductivity
and chloride concentrations.
Pleasant l{arbor will use its best eflorts to sample a minimum of nvo coastal domestic wells
for electrical conductivity and chloride concentrations twict a year in April and August.
Sampling will be dependent upon obtaining the permission, cooperation and availability of the
owner of the domestic well. Ecology has identified four potential candidates; Pleasant Harbor
will prioritize these wells, and will seek others if the listed wells are not available. For
consistency, Pleasant Harbor will atternpt to establish a long-term relationship with those well
owners.
SUBSURFACE GROUP, LLC sG0601-03
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Notes:
l) Well locations are approximate. Domestic well locations
typically to nearest quarter quarter unless better known.
2) See Appendix for well togs
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Monitoring Well Location (MW = monitoring
well; VWP = vibrating wire piezometer
Water Supply Well Location
Subsurface GrouP,
LLC
Pleasant l-larbor Marina and Golf Domestic Welland
Monitoring Well
Locations
Grou ndwater I mpact Evaluation
Statesman Corporation
Project Nurnber
sG060l-03
Figure I
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