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Home My WebLink About009February 9, 2012 Mr. David Wayne Johnson Department of Community Development Jefferson County 621 Sheridan Street Port Townsend, Washington 98368 B F D F CONSULTING. LLC. AI, pr7ird Gra it ednv: r�-r SxA rrHon. Pblii Ii -1 11-� -'ab I. hoer Be: R -J Ph ,t.i5nli {�:Hl N„t.,<,...,,.: Draft PLEASANT HARBOR MASTER PLANNED REORT SEIS GROUNDWATER IMPACT ADDENDUM, BRINNON, WASHINGTON Dear David: This letter presents an addendum to the FEIS Water Supply and Groundwater Impact Analysis, Pleasant Harbor Marina and Golf Resort, 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 as shown in Figure 1, and compares those impacts with the Alternative 1 and No Action alternatives. The water balance calculations were performed to estimate the potential impact to the groundwater resources beneath Black Point; in essence they 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 aquifer system. The water balance calculations were performed using climatic data for the area; and calculated the amount of evapotranspiration, runoff, and changes in groundwater recharge based on proposed domestic and irrigation water uses. The basis for these calculations is presented in our November 2007 FEIS report. The proposed water use is within the limitations of the ground and surface water right permits (G2-30436 and S2-30437) granted by the Washington State Department of Ecology on June 16, 2010. The proposed development under Alternative 2 is described in the introduction to the SEIS prepared by you and transmitted to us on December 15, 2011. With respect to groundwater resources, there are few changes in the resort design as the number of residential units has remained the same. The size of the irrigation area may also be less, but was held constant for our calculations. The proposed amount of impervious surfaces 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 reservoir size has no effect on the water balance. The increase in pervious surfaces and a better understanding of the construction phasing of the resort were incorporated into the original water balance 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 presents the cumulative aquifer recharge on an annual basis during the construction and occupancy ofthe resort. The resort development B N DDR CONSU LTI NG. LI -C: 1144-01 C \Users\Scoil Bender\ Documents\0535-01 Pleasant Harbor\PH 2012 SEIS\SEIS Pleasant Harbor Ground” ate r Impact Addendum -docs Letter to Mr. David Wayne Johnson February 9, 2012 Page 2 schedule was based on a possible timeline of construction events and the proposed staging presented in your December 15, 2011 project description. Market and other factors may change this timeline; however, with the resort components as designed, the ultimate calculated recharge for any stage of the resort development will be the same. Figure 2 indicates that the existing (No Action) aquifer recharge is about 760 acre-feet per year (shown for year 2013). After completion of the resort, aquifer recharge will be about 804 acre-feet per year under Alternative 2. As shown in Figure 3, the calculated recharge under Alternative 1 was 822 acre-feet per year. The increase in recharge between the No Action Alternative and Alternatives 1 and 2 is due to a decrease in vegetation at the site through 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, runoff from the impervious surfaces is now routed directly to infiltration. In addition, precipitation can now infiltrate more quickly due to changes in soil moisture associated with irrigation of the golf course. The decrease in aquifer recharge between Alternatives 1 and 2 is primarily due to the decrease in impervious 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, Scott F. Bender L.H.G., C.G.W.P. Enclosures: Figure 1. Alternative 2, Overall Site Plan Figure 2. Alternative 2, Annual Cumulative Aquifer Recharge During Resort Build -out and Completion Figure 3. Alternative 1, Annual Cumulative Aquifer Recharge During Resort Build -out and Completion BENDER CONSULTlNG, LLC 1144-01 C.\Users\Scott Bender\Documents\0535-01 Pleasant HarboOPH 2012 SEIS\SEIS Pleasant Harbor Groundwater Impact Addendum. docx 200 -FT SHORELINE E MARINA ACCESS DRI (PROPOSED) VISITOR AND SLIP OWNER PARKING I JEFFERSON TRANSIT AND MASON TRANSIT STOP (PROPOSED) US 101 HIGHWAY UNNAMED STREAMS AND DRAINAGE COURSES — WITH APPROXIMATE BUFFERS EXISTING MARINA ACCESS FROM HIGHWAY 101 EXISTING SWIMMING POOL PLEASANT HARBOR HOUSE I F v TENNIS COURT AND RESTROOM N E 5 o aso scue w sssi 50 FT SHORELINE UFFER MAINTENANCE BUILDING AND MEAN SEA LEVEL STAFFOUARTERS UNNAMED STREAMS 52 UNITS >AND DRAINAGE COURSES . MARITIME VILLAGE WITH APPROXIMATE BUF S 42 UNITS / �WDFW BOAT LAUNCH ACCESS ROAD ITGENERATION EWATER WENT PLANT PLEAS ANT HARBOR w. gni STEEP SLOPE SETBACK AN RIPARIAN BUFFER (30FT) David Hamilton Architect WA 9230 1-800-662-7765 Project Name: PLEASANT HARBOR Master Planned Resort Figure: Alternative 2: Overall Site Date: December 2, 2011 11.701 S.F. COMMERCIAL. PH AREA CALCULATIONS HOUSE 257 ACRES VIEW HOUSE GOLF COURSE AND RESORT ■HARBOR 12 UNITS AREA: 220.4 ACRES ■RED I UNIT (A LAWFUL EXISTING STRUCTURE.) IMPERVIOUS: 17R EXISTING RESIDENCES: PLEASANT I'IARBUR HOUSE STORAGE TANK PERVIOUS: 97% AMPHITHEATER UNITS: sM ■ MARINA CENTER S.F. COMMFRCIAI. DRIVING RANG MARINA AND MARITIME. VILLAGE PUTTING GREE TOIALCOMMERCIAI BY.(WK)Ss AREA: 3n.3 ACRES TOTAI.COMMF,RCIAI.'. St fMq S. F. IMPERVIOUS: 17% SANITARY SEWER PUMP STATION, R� .PERVIOUS: Ri^E AND GO-GENERUNIT UNITS: 82 EXISTING MARINA . GOLF TERRACES AND CONFERENCE CENTERISPA ORDINARY HIGH 5ao UNITS WATER MARK 36,T oo S.F. COMMERCIAL SEA VIEW VILLAS MARINA AND 206 UNITS MARITIME VILLAGE ALPINE VISTAS 44 UNITS 50 FT SHORELINE UFFER MAINTENANCE BUILDING AND MEAN SEA LEVEL STAFFOUARTERS UNNAMED STREAMS 52 UNITS >AND DRAINAGE COURSES . MARITIME VILLAGE WITH APPROXIMATE BUF S 42 UNITS / �WDFW BOAT LAUNCH ACCESS ROAD ITGENERATION EWATER WENT PLANT PLEAS ANT HARBOR w. gni STEEP SLOPE SETBACK AN RIPARIAN BUFFER (30FT) David Hamilton Architect WA 9230 1-800-662-7765 Project Name: PLEASANT HARBOR Master Planned Resort Figure: Alternative 2: Overall Site Date: December 2, 2011 FT SHORELINE ENVIRONME CONSERVATION EASEMENT 066101a, ALL TREAM WETLAND D XISTING ELL GOLF COURSE AND RESORT SECOND WELL LOCATION OPTION A SECOND WELL LOCATION OPTION B RESTROOM AND TURN BUILDING 1,100 S.F. 11.701 S.F. COMMERCIAL. / HOUSE .REUNION 12 UNITS VIEW HOUSE ■HARBOR 12 UNITS R BREAKFAST ■RED I UNIT (A LAWFUL EXISTING STRUCTURE.) UNDERGROUND WATER EXISTING RESIDENCES: PLEASANT I'IARBUR HOUSE STORAGE TANK I UNIT (LAWFUL EXISTINGSTRUCTURE) AMPHITHEATER POOL ■ MARINA CENTER S.F. COMMFRCIAI. DRIVING RANG 3.501 PUTTING GREE TOIALCOMMERCIAI BY.(WK)Ss TOTAI.COMMF,RCIAI.'. St fMq S. F. VENTILATED UTILITY BUILDING, SANITARY SEWER PUMP STATION, R� AND GO-GENERUNIT CONTROL GATE CK G/ FT SHORELINE ENVIRONME CONSERVATION EASEMENT 066101a, ALL TREAM WETLAND D XISTING ELL GOLF COURSE AND RESORT SECOND WELL LOCATION OPTION A SECOND WELL LOCATION OPTION B RESTROOM AND TURN BUILDING 1,100 S.F. § ) C14 k 0 _ R = � a , Q E � \ \ U / 1-4 0 � : § "t::' E / .± S % _ m & & cn U . � � � \ � � \ � � { � } _ � . . R § \ \_ ƒ ; C r_ u m _& \ . \ NOUN - 3 �\f . � �!) � � M s, N U O w a` �� MM�IIIMMMMIMI� o � W Q � O M � C N C O .N.. O �w L i � o MIM o o W 0 0 0 0 0 0 0 0 0 o W (;aa3-aaae) a2laugaaU anl;ejntunj