HomeMy WebLinkAboutSP201800001 Study Water 1 2018-01-23EXHIBIT G: Timmons Group Analysis of Projected Domestic Water Demands
1001 Boulders Parkway P 804.200.6500
TIMMONS GROUP
YOUR VISION ACHIEVED OURS.
January 16, 2018
Keswick Hall & Golf Club
c/o John Trevenen, General Manager
701 Club Drive
Keswick, VA 22947
Suite 300 F 804,560.1016
Richmond, VA 23225 www.timmons.com
RE: Keswick Hall & Golf Club Renovation — Projected Domestic Water Demands
Dear Mr. Trevenen:
We evaluated the impact of the proposed Keswick Hall & Golf Club renovation Phases 1A and 113 on the
existing domestic water system. Current records provided by the Virginia Department of Health, Office
of Drinking Water (VDH-ODW), specifically Permit Number 2003400 Amended, lists the permitted
domestic water system capacity as 76,000 gallons per day (GPD).
Historical water consumption and well production data spanning the last three years were analyzed to
determine the Average Daily Demand on the existing water system. The following table summarizes
water usage information provided to us by Keswick Estates Utilities, Inc. and Environmental Systems
Services, Ltd:
Water Consumption (Gallons)
Metered Flow
2015
2016
2017
Summary
10,934,907
12,201,941
6,638,938
29,775,786
Peak Month
August
July
July
August
2015
Peak Month Demand
1,375,239
1,368,370
1,367 400
1375 39
Peak Daily Average
44,363
44,141
44,110
44,204
Average Month
911,242
1,016,828
948,420
958,830
Average Day
29,959
33,430
31,316
31,568
Unmetered Flow
1,708,293
2,016,059
1,570,362
5,294,714
% of Well Production
14%
14%
19%
15%
Peak Month
August
July
July
July 2017
Peak Month Demand
139,761
216,130
433,800 1
433,800
EXHIBIT G: Timmons Group Analysis of Projected Domestic Water Demands
Peak Daily Average
4,508
6,972
13,994
8,491
Average Month
142,358
168,005
224,337
178,233
Average Day
4,611
5,434
7,305
5,783
Well Production
12,643,200
14,218,000
8,209,300
35,070,500
Peak Month
August
J!!IL
July
July 2017
Peak Month Demand
1,515,000
1,584,500
1,801,200
1801,200
Peak Daily Average
48,871
51,113
58,103
52,696
Average Month
1,053,600
1,184,833 1
1,172,757
1 137 063
Average Day
34,569
38,864 1
38,621
37,351
Note: Water consumption datafirom January 1, 2015 through July 31, 2017
The Average Daily Demand was calculated as 37,351 GPD. Design capacity of the water system is
evaluated based Maximum Daily Demand. Peaking the Average Daily Demand by 160% yields an existing
Maximum Daily Demand of approximately 59,800 GPD.
Projected demands for Phases 1A and 1B were calculated based on descriptions and quantities provided
by Hart Howerton, Ltd. regarding the proposed renovation items. We assigned water demands to the
renovation items based on unit demand calculations performed in previous studies of the water system,
Virginia Department of Health Waterworks Regulation 12VAC5-590-690, and sound engineering
judgement. A summary of Projected Maximum Daily Demands for Phases 1A and 16 is shown in the
following table:
Projected Maximum Daily Demands
Phase
Description
Count
Unit
Max Day
GPD
Notes
GPD/Unit
Average daily well production
Existing
Maximum Daily Demand
59,800
from 01/2015-07/2017 peaked
160%
VDH Waterworks Regulations 50
Pool Bar and Restrooms
20
Seat
80
1,600
gpd average per restaurant seat
peaked 160%
VDH Waterworks Regulations
Caf6/Retail
600
S.F.
0.5
300
300 gpd average per 1,000 sq. ft.
of retail space peaked 160%
Villa Crawford Bar
VDH Waterworks Regulations 50
Phase IA
Addition
10
Seat
80
800
gpd average per restaurant seat
peaked 160%
Net Spa Treatment Rooms
4
Room
100
400
2 treatments per room, 30 gallons
per treatment, peaked 160%
Average daily flow of 300 gpd
Reduce Key Count
-5
Key
300
-1,500
per unit during the peak month as
determined in the 2007 study
Phase I Subtotal
1,600
Phase 1A Total Demand
61,400
EXHIBIT G: Timmons Group Analysis of Projected Domestic Water Demands
Hotel Wing
43
Key
300
12,900
Average daily flow of 300 go
per unit during the peak month as
Phase 1 B
determined in the 2007 study
Phase 113 Subtotal
12,900
Phase 1B Total Demand
74,300
Our analysis concludes that the existing permitted capacity of 76,000 GPD exceeds the projected
Maximum Daily Demand of 74,300 GPD, therefore the existing system is adequate to handle the
proposed Phases 1A and 16 renovation items.
Please feel free to contact me directly at (804) 200-6389 with any questions that you may have
regarding our water system capacity evaluation.
Respectfully,
Bruce W. Strickland, Jr., P.E.
Water Infrastructure Engineer
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