Short and Long Range
Water Supply Planning
and
Aquifer Performance Test
(APT)
Strategic Action Plan and Council Goals
GOAL 1 : Expansion
To anticipate the need for additional services and
infrastructure to provide opportunities for mixed use
development with goods, services, and employment.
Objective 1.2
To assess the need to expand infrastructure for sustainable growth
Strategy 1.2.2:
Coordinate facility capacity upgrades to meet the City’s growth needs
appropriately
Capacity
• Distribution Capacity – how much water can the pumping,
piping and storage deliver to the customers, including fire
flow (measured in gallons per minute and psi of pressure)
• Permitted Design Capacity – how much water you are allowed
to treat (measured in million gallons per day (MGD)) at the
treatment plants
• Wellfield Capacity – how much water can your wellfield
infrastructure deliver to the treatment plants (measured in
million gallons per day (MGD) and/or gallons per minute)
• Source Water Allocation - how much raw water will the St
Johns River Water Management District permit you to pull out
of the ground (measured in million gallons per day (MGD)
based on an annual average day)
Current Water Capacity Analysis
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Water Plant #1 and #3 Permitted Design Capacity - 9.0 MGD
51 Wells Supplied from the Confined Surficial Aquifer
Available Wellfield Capacity is currently 9.2 million MGD
Consumptive Use Permit Source Water Allocation – 6.875 MGD
annual average day
Water Treatment Plant #2 Permitted Design Capacity - 7.58 MGD
8 Wells Supplied from the Fresh Upper Floridan Aquifer
Available Wellfield Capacity is currently 2.5 MGD
Consumptive Use Permit Source Water Allocation – 4.150 MGD
annual average day
North Wellfield Capacity
9.2 MGD
South Wellfield Capacity
2.5 MGD Current Limiting Capacity
Combined Wellfield Capacity 11.7 MGD Future Limiting Capacity
Palm Coast Wellfield
Projected Flow Demand and
Available Source water
25
Flow/MGD
20
Southern Wellfield
Improvements
15
10
5
Determine Brackish
Aquifer Availability,
Quantity + Quality
0
2015
Need to Increase
Permitted Allocation
2020
Avg Day Flow
Max Day Flow
2025
Permit Allocation
2030
Total Raw Available
2035
Future Potential Water Supply
• Fresh Groundwater
Confined Surficial and South Zone Upper Floridan
Aquifers
• Alternative Water
Brackish Water – North Zone Upper Floridan Aquifer
Fresh Water Concentrate
Stormwater and Reclaimed Water for Irrigation
Reclaimed Water for Indirect Freshwater Aquifer Recharge
Sea Water
Water Supply Availability
• Allocation requests require an Impact Analysis to assure
negative surface impacts don’t occur due to withdrawals
• Fresh Water – Run existing model using existing data to
complete an impact analysis
• Brackish Ground Water – No data available to run in the
model, need to collect data (APT) to complete impact analysis
• Sea Water – Coquina Coast project provided background and
feasibility determination of the source of supply
Timeframes to Determine
Supply Availability
(Complete Impact Analysis)
• Fresh Groundwater – 2 Years
• Brackish Groundwater – 3 Years
• Sea Water – 5 to 10 Years
Timeframes to Implement Supply
(Assuming a Favorable Impact Analysis)
• Fresh Groundwater – Permit Allocation, Funding, Acquire
Wellsites, Design, Construct wells and Raw Water
Collection Pipeline: 5 years
• Brackish Groundwater - Permit Allocation, Funding,
Design, Construct wells, Raw Water Collection and
Concentrate Pipelines, Modify Treatment Plant: 7 years
• Sea Water - Permit Allocation, Permit Outfall, Funding,
Acquire Plant site, Intake site and Outfall site, Design,
Construct Feed-water Pipe and Concentrate Outfall Pipe:
10 - 15 years
When is Supply Needed
• Projected Average Day System Demand Flow
Exceeds Permitted Allocation in 2023
• Projected Maximum Day System Demand Flow
Exceeds Actual Supply Capacity in 2022
How Much Supply Capacity
• Need to Reserve Permitted Source Water Allocation
Capacity and Wellfield Capacity to Allow for Growth and
Water Quality Protection that includes: Planning,
Funding, Permitting, Design, Construction, Maintenance,
Rotation and Resting ≈ 3.0 MGD more than current
average day system demand flow
• Need Enough Wells to Allow for Rotational Operations
and Resting to Maintain Water Quality ≈ 10 wells at 0.3
MGD each, (actual well rates determined by an impact
analysis)
• Wellfield Capacity Planned for in the Five (5) year C.I.P.
Water Supply Improvements Planned
in Current 5 year C.I.P.
• 2015 – Complete APT towards developing an
alternative water supply -$550,000.00 with a 33%
SJRWMD Cost Share Match of $164,142.00
• 2015-2017 – WTP #2 Wellfield Expansion $3,310,000.00
• 2016-2020 – Well Construction Replacements $250,000.00 per year
Recommendations
• Based on the timeframes needed to
determine availability, develop the impact
analysis and implement the use of brackish
water for supply to WTP #3, staff recommends
starting the investigation at this time.
• In following Council’s goals, staff recommends
that City Council approve the Aquifer
Performance Test (APT) project at this time
Questions
Floridan Test / Production Well
Typical Surficial Aquifer Well
Typical Palm Coast Well