AMBERLEY WATER SUPPLY STRATEGY Lead Designer – Stuart Sandy, AECOM Presented by – Bryn Larsen, AECOM MARCH 26, 2014
AMBERLEY WATER STRATEGY PROJECT OVERVIEW
PROJECT DRIVERS - Already close to restrictions being imposed at peak times - Population growth and development - Decline in water quality with regard to Iron content - Over-reliance on the single source currently owned by Amberley – lack of supply resilience AMBERLEY WATER STRATEGY April 7, 2014 Page 3
WATER SOURCES RACECOURSE ROAD SOURCE 1956 – Reticulation network and Domain source established AMBERLEY RESERVOIR 1966 – State Highway 1 source established AMBERLEY TOWNSHIP AMBERLEY DOMAIN 1972 – SH1 becomes primary SOURCE (ABANDONED) source for Amberley AMBERLEY BEACH 2009 - Domain source KOWAI RIVER abandoned due to deepening of ROAD STATE SOURCE Kowai River bed HIGHWAY 1 SOURCE LEITHFIELD Other current & potential sources MAYS WELL SOURCE LEITHFIELD BEACH SOURCE Presentation Title 4/7/2014 Page 4
FORECAST WATER DEMAND (AMBERLEY) AMBERLEY WATER STRATEGY April 7, 2014 Page 5
WATER AVAILABLE AMBERLEY WATER STRATEGY April 7, 2014 Page 6
AMBERLEY WATER STRATEGY PROPOSED OPTIONS
OPTION 1 AMBERLEY BACKUP SUPPLY RESERVOIR FROM RACECOURSE CLUSTER ROAD SOURCE MAX. 5.5 L/S CAPACITY 720 M 3 Do Nothing - Ongoing operation AMBERLEY TOWNSHIP and maintenance DEMAND Approximate costs 17.8 L/S cost of network - investment - $0 Lack of investment in the network will EXISTING 150mm PVC RETICULATION result in a failure to AMBERLEY meet present and BEACH DEMAND future needs as a 2.4 L/S statutory authority KOWAI RIVER ROAD NORTHERN SOURCE ASHLEY CURRENT 5.3 L/S RURAL CONSENT 15 L/S WATER STATE HIGHWAY 1 SOURCE CURRENT 13.8 L/S CONSENT 20 L/S LEITHFIELD TOWNSHIP LEITHFIELD BEACH SOURCE LEITHFIELD CURRENT 9 L/S MAYS WELL BEACH CONSENT 30 L/S SOURCE DEMAND 4.5 L/S April 7, 2014 Page 8
OPTION 2 AMBERLEY RESERVOIR CLUSTER - 3600m of new CAPACITY 720 M 3 200mm water Supply from main AMBERLEY TOWNSHIP Leithfield Beach, DEMAND - Water mixing 17.8 L/S SH1 and Kowai NEW 5000 M 3 facility RESERVOIR ON including storage DOMAIN SITE - New pumps at Approximate cost - Leithfield Beach EXISTING 150mm PVC RETICULATION $3.57M + Kowai and upgrade at AMBERLEY assets BEACH Kowai DEMAND 2.4 L/S - New 5000m3 NEW WATER MIXING FACILITY & PUMPING reservoir on STATION AT KOWAI RIVER ROAD Domain site KOWAI RIVER ROAD NORTHERN SOURCE ASHLEY PROPOSED 5.3 L/S - RURAL Purchase of the WATER Kowai bore and STATE HIGHWAY 1 SOURCE PROPOSED 13.8 L/S 150mm PVC LEITHFIELD TOWNSHIP reticulation LEITHFIELD BEACH SOURCE LEITHFIELD PROPOSED 21 L/S MAYS WELL BEACH CONSENT 30 L/S SOURCE DEMAND 4.5 L/S 4/7/2014 Page 9
OPTION 3 AMBERLEY BACKUP SUPPLY RESERVOIR CLUSTER FROM RACECOURSE ROAD SOURCE MAX. 5.5 L/S CAPACITY 720 M 3 - 600m of new Increased supply 150mm water from SH1 and Kowai main at AMBERLEY TOWNSHIP Kowai River including treatment DEMAND Road 17.8 L/S Approximate cost - - Purchase of $800k + cost of Kowai the Kowai assets EXISTING 150mm PVC RETICULATION bore and AMBERLEY 150mm PVC BEACH DEMAND 2.4 L/S reticulation NEW TREATMENT - New FACILITY & PUMPING STATION AT KOWAI RIVER ROAD treatment facility at KOWAI RIVER ROAD NORTHERN SOURCE ASHLEY Kowai River CURRENT 5.3 L/S RURAL PROPOSED 15 L/S WATER STATE HIGHWAY 1 SOURCE - Pump CURRENT 13.8 L/S PROPOSED 20 L/S LEITHFIELD upgrade at TOWNSHIP Kowai River LEITHFIELD BEACH SOURCE MAYS WELL CURRENT 9 L/S SOURCE CONSENT 30 L/S 4/7/2014 Page 10
AMBERLEY BACKUP SUPPLY RESERVOIR - OPTION 4 FROM RACECOURSE New treatment CLUSTER ROAD SOURCE MAX. 5.5 L/S CAPACITY 720 M 3 facility at Kowai River Road Increased supply from SH1 and AMBERLEY - New 200mm TOWNSHIP DEMAND Kowai including main from 17.8 L/S treatment – Kowai site to new connection Leithfield Beach on SH1 150mm supply for Ashley main. EXISTING 150mm PVC RETICULATION AMBERLEY Approximate cost - BEACH - New 2000m x DEMAND 2.4 L/S $1.2M 200mm from Leithfield Beach NEW TREATMENT FACILITY & PUMPING to Leithfield STATION AT KOWAI RIVER ROAD Township KOWAI RIVER ROAD NORTHERN SOURCE ASHLEY CURRENT 5.3 L/S RURAL - New 800m x PROPOSED 15 L/S WATER 150mm Old STATE HIGHWAY 1 SOURCE Main North Rd CURRENT 13.8 L/S PROPOSED 20 L/S LEITHFIELD TOWNSHIP - New 500m x LEITHFIELD BEACH SOURCE 150mm Mays MAYS WELL NEW 200mm CURRENT 9 L/S SOURCE WATER MAIN PROPOSED 24 L/S Rd CONSENT 30 L/S PROVIDING 15 L/S TO ASHLEY WATER SCHEME SOURCE 4/7/2014 Page 11
CONCLUSIONS OPTION 4 GIVES • SECURITY OF SUPPLY/ NETWORK RESILIENCE • INCREASE IN WATER QUALITY • CAPACITY FOR GROWTH • BENEFITS BOTH ARWS AND AMBERLEY NETWORKS Presentation Title 4/7/2014 Page 12
Risks Operational Lack of above ground storage. Political Ongoing negotiation between Amberley and Ashley water systems could prevent any of the options proceeding (i.e. risk of doing nothing) Presentation Title 4/7/2014 Page 13
Lessons learned - Best engineering solution not always best for situation - Water schemes managed by committees - Differences in system and operation - UK predominately fed by gravity systems Question - Is a committee led water scheme the best form of management, and if so how could this be improved? Presentation Title 4/7/2014 Page 14
Thank You QUESTIONS ? Bryn.larsen@aecom.com
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