impacts of growth on swpp - southwest water authority

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Southwest Pipeline Project Impacts of Growth

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Page 1: Impacts of Growth on SWPP - Southwest Water Authority

Southwest  Pipeline  Project    Impacts  of  Growth

Page 2: Impacts of Growth on SWPP - Southwest Water Authority
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Oil wells drilled since 2007

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0  

10000  

20000  

30000  

40000  

50000  

60000  

70000  

2010   2024   2038  

Popu

la'on

 

Year  

Rural  

Stark  County    

Rural  CommuniDes  

Dickinson  

Total  

Page 7: Impacts of Growth on SWPP - Southwest Water Authority

Intake  •  Water  Service  Agreement  with  Basin  Electric  for  their  exisDng  

intake  which  serves  AVS,  DGC.    State’s  cost  was  $4.2m  •  1986  agreement  only  provides  for  10,600  GPM  to  SWPP  •  Actual  capacity  dependent  on  lake  level  i.e.  11,600  GPM  at  1811  

(2008)  Raw  Water  Main  Transmission  Line  •  Design  Capacity  of  9,150  GPM  to  Dickinson  (13.2  MGD)  •  Leaves  1,450  GPM  for  Oliver  Mercer  Northern  Dunn  (OMND)  

WTP    -­‐    Currently  (2012)  takes  up  to  2,800  GPM,  (UlDmate  4,200  GPM)  

Dickinson  Water  Treatment  Facility  •  12  MGD  Facility  

Page 8: Impacts of Growth on SWPP - Southwest Water Authority

2038  Demand  Projec'ons    17,200  GPM  for  the  Intake  to  OMND  WTP    13,000  GPM  for  OMND  WTP  to  Dickinson  

Intake  •  Supplementary  Intake  needed  as  BEPC  is  reserving  capacity  (40kgpm)  

Main  Transmission  Line  (MTL)  Facili'es  •  Parallel  Pipelines  •  Pump  StaDon  Upgrades  •  Surge  Control  (Air  Chamber)  Upgrades  Dickinson  Water  Treatment  Facility  •  Expand/NEW  for  addiDonal  Capacity  

Page 9: Impacts of Growth on SWPP - Southwest Water Authority

Two  Exis'ng  Facili'es    1)  Basin  Electric  Power  Coopera've  (BEPC)  Intake  Building  •  SWPP  has  one  100  HP  and  three  200  HP  Pumps  in  Caisson  2)  Adjacent  SWPP  Intake  Booster  Pump  Sta'on  •  One  300  HP  and  three  600  HP  Pumps  •  Surge  Control  Air  Chamber,  1,850  cf  

Page 10: Impacts of Growth on SWPP - Southwest Water Authority

Exis'ng    Intake    

•  ExisDng  Intake  Agreement  allows  10,600  GPM  to  SWPP    

•  Demand  ProjecDons  

•  17,200  GPM  required  for  2038  populaDon  Supplementary  Intake  

•  7,000  GPM  Secondary  intake  (Screen  at  10,000  gpm)  

•  VerDcal  Caisson  (Horizontally  DirecDon  Drilled    -­‐  HDD)  

•  New  1,200  cf  Surge  Control  Air  Chamber  

•  3  pumps  at  600  HP  

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Pipeline  •  86.5  miles  of  24”,  30”,  and  36”  DucDle  Iron  and  Steel  Pipe  Pump  Sta'ons    •  Dodge-­‐  two  150  HP  and  three  700  HP  Pumps  •  Richardton-­‐  two  400  HP  and  three  900  HP  Pumps  Reservoirs  •  OMND  WTP  site-­‐    Two  1  MG  raw  water  steel  ground  storage  res.  •  Richardton-­‐  1.3  MG  steel  ground  storage  reservoir  •  Dickinson-­‐  4.8  MG  concrete  reservoir  Surge  Control  Air  Chambers  •  One  Air  Chamber  at  the  Intake  BPS  and  one  at  Richardton  BPS  •  Three  underground  Air  Chambers,  one  US  of  Dodge  and  two  DS  

Page 15: Impacts of Growth on SWPP - Southwest Water Authority

Incrementally  Parallel  Pipelines  as  needed  •  4  Miles  of  Paralleling  between  the  Intake  and  OMND  WTP  •  5.5  Miles  of  Paralleling  between  OMND  WTP  and  Dodge  •  14.8  Miles  of  Paralleling  between  Dodge  and  Richardton  •  6.5  Miles  of  Paralleling  between  Richardton  and  Dickinson    Pump  Sta'on  Upgrades  •  Dodge  –  Replace  three  700  HP  pumps  with  900  HP,  add  one  900  HP  •  Richardton  –  Replace  three  900  HP  pumps  with  1200  HP  Upgraded  Surge  Control  Facili'es  •  New  Richardton  AC    1,400  cf  and  two  new  underground  AC’s  

between  Dodge  and  Richardton,  1,050  cf  and  1,700  cf  

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Parallel  Pipe    

Parallel  Pipe    

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Exis'ng  Facility  •  Built  in  1951  (2  MGD),  expanded  in  1966  (6  MGD),  1988  •  Converted  to  Missouri  River  water  in  1991  •  Capacity  Upgrade  in  1994  and  Treatment  Upgrade  in  1996  

increased  capacity  to  12  MGD  •  Allowed  parallel  operaDon  of  8  MGD  and  4  MGD  Solids  Contact  Basins  •  Dual  Media  Filters  with  higher  loading  rate  

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6  MGD  of  addiDonal  Capacity  Needed  1.  Expansion  of  exisDng  facility  from  12  to  18  MGD  2.  ConstrucDon  of  new  Expandable  6  MGD  Facility  on  

adjacent  site  3.  New  18  MGD  facility  at  OMND  4.  New  18  MGD  facility  to  East  of  Dickinson  

Also  need  a  new  Joint  Finished  Water  Pumping  Facility  

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Dickinson  WTP  Site  

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