oc harbor brook wetlands stakeholder 6 15-11 final-1
DESCRIPTION
The Harbor Brook CSO 018 Constructed Wetlands Pilot Treatment System Project serves the dual purposes of treating CSO 018 overflows currently discharged into Harbor Brook while also acting as a demonstration project to test the effectiveness of three types of constructed treatment wetland systems.TRANSCRIPT
Onondaga County CSO Program:Gray-Green Infrastructure
Harbor Brook CSO 018 Constructed Wetlands Pilot Treatment SystemJoanne M. Mahoney, County Executive
Prepared for:
Onondaga County, Syracuse, New YorkPrepared by:
2011
and
History
Onondaga Lake Facts
Watershed: 285 Square
Miles
1 Mile Wide – 4.6 Miles
Long
Average Depth: 35 feet
Max Depth: 63 feet
1940 – Swimming Banned
1970 – Fishing Banned
• 1988 – Atlantic States Legal Foundation files lawsuit against County
• 1989 – Litigation settled through METRO consent judgment
• 1998 – METRO consent judgment replaced with Amended Consent Judgment (ACJ)
• 1st ACJ amendment May 1998
• 2006 ACJ Amended to include consolidation of ammonia and phosphorus treatment and Harbor Brook conveyances and RTF
• 3rd Amendment April 2008 (Extension)
• 2009 ACJ amended to authorize use of Gray and Green infrastructure
Save the Rain Program: 2009-2018
Regulatory Goals • Capture and Treat 95% of
the Annual CSO Volume via Gray & Green Infrastructure
• Achieve water quality standards in tributaries and lake
Community
Impacts/Goals• Improve quality of life
• Promote Sustainability
• Ensure cost effectiveness in compliance with ACJ milestones
Major Milestones
• 89.5% capture/elimination by 12/31/2013
• 95% capture/elimination by 12/31/2018
Gray Infrastructure Program Summary
Gray Projects
• Harbor Brook Interceptor (ARRA)
• Midland Conveyance (CSO 044)
• Clinton Storage Facility and Electrical Ductbank
• Harbor Brook Storage Facility and Conveyances
• Erie Boulevard Storage System (EBSS) Gate Chamber #3 Improvement
• Sewer separation projects
• Floatables Control Facilities
Gray Project Construction ScheduleCSO 022/045 Sewer Separation Consent Order Milestones: Complete Construction: 12/31/12Construction Period: September 2011 – June 2012 Clinton Storage FacilityConsent Order Milestones: Commence Construction: 10/1/11
Complete Construction: 12/31/13Construction Period: August 2011 – December 2013 Lower Harbor Brook Conveyances: Consent Order Milestones: Commence Construction: 12/31/11
Complete Construction: 12/31/13Construction Period: September 2011 – June 2012 Lower Harbor Brook Storage: Consent Order Milestones: Commence Construction: 12/31/11
Complete Construction: 12/31/13Construction Period: October 2011 – December 2013 Electrical Duct Bank on West Fayette Street ( Part of Clinton Storage Project)Consent Order Milestones: N/A Construction Schedule: July 2011 – October 2011
Harbor Brook Storage Project
N
Captures CSO 003, 004, 063
Designed to capture rain water for system flushing/cleaning
4.8 Million Gallons of storage (sub-surface)
Sta
te F
air
Blv
d
Green Infrastructure ProgramSave the Rain Program
6.3% Capture Using Green Infrastructure - Green 470 acres and reduce 247 MG/yr of CSO by 2018
Dept. of Transportation Parking Lot
Manages adjacent impervious areas
City Lot #3 - Before
Warren Street
Parking Lot #3
James Stre
et
Erie BoulevardW
arren Street
James Stre
et
Erie Boulevard
Porous ConcreteCaptures over 700,000 gallons of stormwater annually
Roadways - Green Streets for Road and Utility Improvement / Reconstruction
Constructed Wetland
HarborBrook
CSO 018
CSO Treatment Wetland Project
Pilot Treatment System Benefits•Pilot system will provide immediate water
quality improvements:▫Grit and floatables (onsite at-grade
structure)▫Bacteria▫Nutrients (nitrogen and phosphorus)▫Total suspended solids and BOD5
•Recommendation from pilot will result in a final permanent wetland treatment system
•Designed for 1-year, 2-hour storm event, but higher flows and volumes could be accepted
May2011
16
Existing Site
May 2011
17
Project LocationThe project is located along Harbor Brook on County property just south of Burnet Park on the west side of Syracuse near the Skunk City neighborhood.
May 2011
18
Site Enhancement Ultimate Vision
▫ Grit and floatables removal of CSO 018
▫ Wetland treatment of CSO 018
▫ Improved water quality in Harbor Brook
▫ Community park?▫ Educational
resource?
May 2011
19
Pilot Treatment Wetlands System
March 2011
20
Surface Flow Wetland▫ Most closely
resembles a natural wetland of robust native species
▫ Vegetated shelf and deep water zones to redistribute and aerate
▫ Medium to high storage volume
▫ High habitat value▫ Low mosquito
productivity▫ Relatively low cost
First Step to Site Enhancement
May 2011
21
Design and construction of a 2 acre full scale pilot treatment wetland system along Harbor Brook at Combined Sewer Overflow (CSO) 018. VELASKO ROAD
Conceptual Rendering
May 2011
22
Three types of wetlands will be constructed for pilot testing: Floating Wetland Island, Vertical Downflow, and Surface Flow.
11/18/2010
23
Conceptual Rendering
Floating Wetland Islands
May 2011
24
Vertical Downflow Wetlands
March 2011
25
Surface Flow Wetland
May 2011
26
Questions and Discussion
May 2011
27
11/18/2010
28
More information
Thank You!
Please Visit us atwww.SaveTheRain.us