ocean outfall legislationoverview
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Ocean Outfall Legislation OverviewRoy Coley, MBADirector, Miami-Dade Water & Sewer Department Program Update Spring 2021
Agenda
• Legislation Overview• WASD Compliance Plan
• Reduction of Ocean Outfall Disposal • Nutrient Diversion• Reuse Program
• Status of Projects
Ocean Outfall Legislation Objectives
WASD’s Compliance InvestmentsProject Status
Completed
Construction
Procurement
Design
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1323
PROJECTS22billion$2.2
Reduction in Ocean Outfall Discharge
• WASD will achieve elimination of 95%+ of Ocean Outfall Discharges by 2025
• This is accomplished via improvements to the Central and North District WWTP’s
• Tertiary Treatment (High Level Disinfection)
• Development of Deep Injection Wells
Diversion of Nutrient Loads from Environment 59,900,000
0
10,000,000
20,000,000
30,000,000
40,000,000
50,000,000
60,000,000
70,000,000
2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025
Cumulative TN Load Diverted to Injection Wells (lbs)
Required Cum. Diversion Actual Projected
2,900,000
0
1,000,000
2,000,000
3,000,000
4,000,000
5,000,000
6,000,000
2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025
Cumulative TP Load Diverted to Injection Wells (lbs)
Required Cum. Diversion Actual Projected
• WASD is diverting nutrients by 2025 & ahead of schedule.
• Nitrogen: 59.9 million lbs• Phosphorous: 2.9 million lbs
• To achieve this WASD invested approximately $50 million at CDWWTP
• Maximizing use of existing injection wells at NDWWTP
Reuse Program• Miami-Dade County has partnered with FPL to
construct a 15 million gallon per day Clean Water Recovery Center
• 4th Largest Reuse Facility in the State of Florida
• The facility will treat wastewater for utilization within Turkey Point’s Cooling Towers, allowing for the re-allocation of Floridan Aquifer water supply for environmental purposes
• The project will serve as a cornerstone of Miami-Dade County’s wastewater reuse program given its expandability for an additional 30 MGD
• Program consists of all technically, environmentally, and economically feasible reuse
North District Wastewater Treatment Plant Improvements
Projects:
• Municipal deep injection well system
• Site preparation and mitigation of impact to wetlands
• Conversion of the existing Outfall Pump Station to a Transfer/Outfall Pump Station
• High-Level Disinfection Facilities• Electrical Distribution Building
Total Investment of $436 MCompletion Date: Dec. 2025
Central District Wastewater Treatment Plant Improvements
Projects:• Municipal deep injection well system• Industrial deep injection well system• Conversion of the existing Outfall
Pump Station to a Transfer/Outfall Pump Station• High-level Disinfection Facilities (Disk Filters, Chlorine Contact Tank)• Improve the existing stormwater system• One oxygenation train and three secondary clarifiers
• New Electrical Distribution Buildings
Total Investment: $1,157MCompletion Date: Dec. 2025
South District Wastewater Treatment Plant Improvements
Projects:• Rehabilitation of ox trains including
mechanical mixer replacement
• New Headworks and two new oxygenation trains
• New secondary clarifier; RAS Pump Station 3 improvements; New Filter Train
• New chlorine contact tank; new 72-inch well loop interconnect
• New Electrical Distribution Building with new back-up engine-generators
• Three municipal injection wells
Total Investment: $656MCompletion Date: Dec. 2025
On-Going Construction
Thank You
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Broward County’s Ocean Outfall Law Update
Kevin Carter, Broward County Water and Wastewater Services [email protected]
954-831-0718
South Florida Regional Planning Council Monthly MeetingJune 28, 2021
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o Broward County provides both drinking water and wastewater services in different areas of the county.
o NRWWTP opened in 1975 and assisted by United States Environmental Protection Agency’s wastewater plant regionalization efforts (Federal Clean Water Act’s Construction Grants Program).
o Now provides wastewater service to over 600,000 people in Broward County’s northern region via retail and 11 large users systems.
o Current effluent practices are ocean outfall discharge, deep well injection, and water reuse.
Broward County’s North Regional Wastewater Treatment Plant (NRWWTP) Overview
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Solving the Ocean Outfall Legislation Challenge: A Purple Pipe Partnership is Born
o Per Ocean Outfall Law’s 60% water reuse requirement, Broward County needed to increase production to 26 million gallons per day (MGD) capacity from current 10 MGD: Initial cost estimates were over $500 million.
o Palm Beach County needed alternative water supply for irrigation purposes in county’s populated southwest area. Provide regional conservation of Biscayne Aquifer.
o Partnership implemented through an interlocal agreement approved by both Counties in 2016. NRWWTP water reuse improvements: $62 million Broward County water reuse pipelines: $33 million Broward County pays Palm Beach County’s water reuse system
construction costs but repaid over time: estimated $44 million
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o 42-inch diameter pipe from NRWWTP to Hillsboro Canal (yellow).
o 24-inch diameter pipe westward to North Springs Improvement District (NSID, purple).
o Will provide up to 10.5 million gallons per day (MGD) to Palm Beach County and up to 3.5 MGD to NSID.
Broward County Water Reuse Transmission Main Pipeline Project
24”
Sawgrass Expressway
Sample Road
Hillsboro Blvd.
FL T
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Hillsboro Canal
Palm Beach County
Broward County
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Scenes from the Broward County Water Reuse Transmission Main Pipeline Project
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Future Palm Beach County Water Reuse System
o 5 sequences will allow water reuse delivery to areas with need.
o Golf course and residential irrigation will be primary use.
o A two-connection system between the two counties replaced the original one connection plan:
Increased flexibility and redundancy = Strengthened resiliency
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Some Key Milestones and Looking Forward
o Broward County’s NRWWTP water reuse improvements and pipelines construction scheduled for 2021 completion. 26 million gallons per day water reuse among top facilities in state.*
o Many thanks to the Florida Department of Environment Protection and the South Florida Water Management District for a $3 million alternative water supply grant for pipelines construction.
o Palm Beach County water reuse system design and construction to occur over the next few years for water reuse delivery from Broward County.
o Many thanks to the Florida Department of Economic Opportunity and U.S.Department of Housing and Urban Development for a $6.25 million grant for Broward County’s $12.5 million ‘Regional Effluent and Reuse Solutions’ project.
* https://floridadep.gov/water/domestic-wastewater/content/reuse-inventory-database-and-annual-report
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Conversations lead to solutions, let’s talk
Questions/Discussion Time
Kevin CarterBroward County Water and Wastewater Services
Vivek Galav, P.E.Director, City of Hollywood Public Utilities
South Florida Regional Planning Council Monthly Meeting
June 28, 2001
Ocean Outfall Compliance UpdateCity of Hollywood Compliance
Requirements and Progress
Department of Public Utilities
Agenda
Hollywood’s Service Area and History of Outfall Use
City’s Unique Considerations and Approaches
Outfall Transition Progress, Remaining Work, Benefits and Cost
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Department of Public Utilities
Wastewater, Reuse and Water Infrastructure
Southern Regional Wastewater Treatment Plant (SRWWTP) – Outfall capacity – 46.3 mgd– AADF – 38 mgd– Outfall in service since 1968– Deep wells in service - 2003
Reuse system – Permit capacity - 4 mgd– AADF – 2.7 mgd– Treats reuse water from Davie
and Cooper City Water System Demand
– Hollywood – 16 mgd– Broward – 6 mgd
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UNIQUE COMPLIANCE CONSIDERATIONS
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Department of Public Utilities
Infiltration of brackish groundwater renders the effluent too salty for typical reuse applications
• Infiltrated brackish groundwater renders effluent unsuitable for irrigation
• Seasonal tidal flooding exacerbates brackish water impacts
• Coastal utilities (Hollywood, Dania Beach, Hallandale Beach) contribute brackish groundwater
Department of Public Utilities
Hollywood’s Unique Compliance Challenges The quality of the effluent is incompatible with most conventional reuse
applications – desalination required
Required reuse exceeds the City’s total water demand and is more than double the estimated total outdoor water use
The City has aggressively implemented other measures that cost effectively provide equivalent benefit, thereby reducing demand for reclaimed water
Most constraints are unique to the City and present hurdles that render exclusive reuse infeasible
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Department of Public Utilities
Ocean Outfall Legislation Compliance Approach
• FDEP approved approach adapted to Hollywood’s unique challenges (over $300 mil cost savings)
• Key elements of compliance approach
1. Reuse – 10 million gallons per day (mgd) totala) 4 mgd for in-process recycling (fully satisfied)b) 4.5 mgd to be contracted with other utilities (partially
satisfied)c) 1.5 mgd expansion of existing reuse in Hollywood (ongoing)
…….Continued7
Department of Public Utilities
Ocean Outfall Legislation Compliance Approach
• Key elements of compliance approach (Continued..)
2. Reduced nutrient discharge to oceana) Actual nutrients discharged limited to 36% of amount
allowed
3. Reduce discharges by 2025 (except peak wet weather flows) a) OOL requires 95% reductionb) Hollywood’s target is 99% reduction
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OUTFALL TRANSITION PROGRESS, REMAINING WORK, BENEFITS AND COST
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Department of Public Utilities
Status and Cost of Major Compliance Program Elements
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The City is on track to satisfy its requirements ahead of schedule
1. Compliance Elements – Reuse
A. Contracted Reuse (4.5 mgd) Satisfied 2.0 mgd Unsatisfied commitment 2.5 mgd
B. Actual Reuse (1.5 mgd) Effluent supply expansion Transmission expansion
….Continued
Department of Public Utilities
Status and Cost of Major Compliance Program Elements
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The City is on track to satisfy its requirements ahead of schedule
2. Compliance Elements – Effluent Disposal
A. Injection Well (IW) Capacity ExpansionConstruction completed - Fall 2021 (approx. $40 million)
B. IW Pump Station Expansion• Design nearing 100% completion (Est. $93 million)• Bid Advertisement - Fall 2021
Department of Public Utilities 12
Thank You