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Polson Water Supply Presentation to Polson City Council. September 9, 2009. PRESENTERS. Roger Noble, Sr. Hydrogeologist Applied Water Consulting, LLC Tony Porrazzo, Superintendent Polson Water and Sewer Department. WATER SUPPLY SOURCES. Surface Water – Hell Roaring Creek - PowerPoint PPT Presentation
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Polson Water Supply Presentation to
Polson City Council
September 9, 2009
PRESENTERSPRESENTERS
Roger Noble, Sr. HydrogeologistRoger Noble, Sr. Hydrogeologist Applied Water Consulting, LLCApplied Water Consulting, LLC
Tony Porrazzo, SuperintendentTony Porrazzo, Superintendent Polson Water and Sewer Polson Water and Sewer
DepartmentDepartment
WATER SUPPLY WATER SUPPLY SOURCESSOURCES
Surface Water – Hell Roaring CreekSurface Water – Hell Roaring Creek
Alluvial AquiferAlluvial Aquifer Groundwater Groundwater Deltaic Deltaic
AquiferAquifer
Bedrock AquiferBedrock Aquifer
HISTORY OF VIOLATIONSHISTORY OF VIOLATIONSHELL ROARING CREEKHELL ROARING CREEK
May 16, 1995May 16, 1995 June 16, 1995June 16, 1995 June 20, 1995June 20, 1995 July 28, 1996July 28, 1996 July 31, 1997July 31, 1997 October 22, 1997October 22, 1997
Violation of TCR and/or Fecal Violation of TCR and/or Fecal ColiformColiform
EPA Surface Water Treatment RuleEPA Surface Water Treatment Rule
HKM Feasibility Study HKM Feasibility Study
Whitefish uses Haskill CreeksWhitefish uses Haskill Creeks
Upgrade costs ~ $7,000,000Upgrade costs ~ $7,000,000
HELL ROARING HELL ROARING WATER RIGHTSWATER RIGHTS
Flow RateFlow Rate VolumeVolume Priority DatePriority Date
900 gpm900 gpm 1,460 ac-ft1,460 ac-ft January January 3, 19223, 1922
1,125 gpm1,125 gpm 1,825 ac-ft1,825 ac-ft September 4, 1947September 4, 1947
(225 gpm)(225 gpm) (365 ac-ft) (365 ac-ft)
DepthDepth Production DateProduction DateWell No.Well No. (feet)(feet) Zone (feet)Zone (feet)
ConstructedConstructed 1 1 525 525 251-292 251-292 19691969 22 166 166 150-160 150-160 19601960 33 177 177 152-174 152-174 19761976 44 150 150 128-140 128-140 20002000 55 135 135 113-125 113-125 2000 2000 66 385 385 258-385 258-385 19991999 77 350 350 239-350 239-350 20012001 8*8* 428 428 398-418 398-418 19701970 9*9* 530 530 512-524 512-524 19661966
*Northwest Holdings*Northwest Holdings
WellWell Permitted Permitted Current Current Volume Volume No.No. CapacityCapacity Pumping RatePumping Rate (ac-(ac-
ft)ft) 1 1 450 450 0 0 77 77 22 450 450 400 400 726 726 33 650 650 500 500 246 246 44 500 500 200 200 712 712 55 500 500 100 100 66 500 500 425 425 1,2691,269 77 500 500 425 425 88 250 250 0 0 424 424 99 250 250 0 0
TotalTotal 4,0504,050 2,050 2,050 3,454 3,454
Pumping 24/7/365 = 2,141 gpmPumping 24/7/365 = 2,141 gpm
Drawdown Well 2 2006
0.0
2.0
4.0
6.0
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1/1/2006 3/1/2006 5/1/2006 7/1/2006 9/1/2006 11/1/2006
Date
Wa
ter
Ab
ov
e T
ran
sd
uc
er
(fe
et)
On
Off
Drawdown Well 3 2006
20.0
22.0
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1/1/
2006
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2006
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2006
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2006
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2006
10/1
/200
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11/1
/200
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/200
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Date
Wat
er A
bo
ve T
ran
sdu
cer
(fee
t)OnOff
Figure 4 - Predicted Affect of Pumping at 400 gom
110.00
115.00
120.00
125.00
130.00
135.00
140.00
0.0 30.0 60.0 90.0
Elapsed Time (minutes)
Wat
er L
evel
BT
OC
(fe
et)
30 gpm60 gpm
SWL = 119.58 btoc
82 gpm
Upper most perfortations at 128.5 feet btoc = maximum potential drawdown
Predicted drawdown at pumping rate of 400 gpm =131.3 feet
IRON AND MANGANESE IRON AND MANGANESE LEVELSLEVELS
Well No.Well No. IronIron ManganeseManganese
66 1.271.27 ND ND
77 1.181.18 ND ND
88 0.130.13 0.39 0.39
99 NDND 0.42 0.42
MCLMCL 0.30 mg/L 0.05 0.30 mg/L 0.05 mg/Lmg/L
Well No.Well No. Water QualityWater Quality
2, 3, 4, & 52, 3, 4, & 5 Excellent; no Fe or Excellent; no Fe or MnMn
6 and 76 and 7 High Iron; treatableHigh Iron; treatable
1, 8, and 91, 8, and 9 High Manganese; High Manganese;
Very expensive to treatVery expensive to treat
0
50
100
150
200
250
300
350
Gal
lon
s (X
1,0
00,0
00)
Total Gallons Pumped
Total Gallons Billed
2004 2005 2006 2007 2008
0
50
100
150
200
250
300
350
Gal
lon
s (X
1,0
00,0
00)
Total Gallons Pumped
Total Gallons Billed
2004 2005 2006 2007 2008
0
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Ga
llo
ns
(X
1,0
00
,00
0)
Total Gallons Pumped
Total Gallons Billed
Aug 2004 Dec Aug 2005 Dec Aug 2006 Dec Aug 2007 Dec Aug 2008 Dec
RECOMENDATIONSRECOMENDATIONS
Provide sufficient water supply Provide sufficient water supply to accommodate future to accommodate future growthgrowth
1.1. Drill additional test wells to the Drill additional test wells to the north and west of PWS-3north and west of PWS-3
2.2. Drill test wells along the south shoreDrill test wells along the south shore
3.3. Replace high manganese wellsReplace high manganese wells
