Presentation on "greening the gray" projects in Onondaga County, NY. Presented at the 2012 NYWEA Conference by Bob Kukenberger, Gray Infrastructure Program Manager, CDM Smith.

1. Onondaga County CSO
Abatement – Greening the Gray
Joanne M. Mahoney, County Executive
Onondaga Lake Amended Consent Judgment (ACJ) Compliance Program
New York Water Environment Association
84th Annual Meeting
Tom Rhoads, Commissioner, Onondaga County
Robert Kukenberger, CDM/C&S
Kristen Angello, Malcolm Pirnie the Water Division of Arcadis,
Bruce Munn, GHD
Rob Ganley, O’Brien & Gere

2. Onondaga County,
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City of Syracuse
New York Onondaga Lake
Onondaga Creek
• 7,660 acres
• 49 CSOs Harbor Brook
• ~1 Billion gallons/year CSO

3. • 1988 – Atlantic States Legal Foundation
History
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files lawsuit against County
• 1989 – Litigation settled through
METRO consent judgment Onondaga Lake Facts
• 1998 – METRO consent judgment
replaced with Amended Consent Watershed: 285 Square Miles
Judgment (ACJ)
1 Mile Wide – 4.6 Miles Long
• 1st ACJ amendment May 1998
• 2006 ACJ Amended to include Average Depth: 35 feet
consolidation of ammonia and
phosphorus treatment and Harbor Max Depth: 63 feet
Brook conveyances and RTF
1940 – Swimming Banned
• 3rd Amendment April 2008 (Extension)
• 2009 ACJ amended to authorize use of 1970 – Fishing Banned
Gray and Green infrastructure

4. 4th ACJ Amendment Authorized a 4
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Balanced Approach to CSO Abatement
Regulatory Goals Community Impacts/Goals
• Capture and Treat 95% of the • Improve quality of life through
Annual CSO Volume via Gray environmental responsibility
& Green Infrastructure • Promote sustainability
• Achieve water quality • Ensure cost effectiveness in
standards in tributaries and compliance with ACJ milestones
lake • Community revitalization
Major Milestones
• 89.5% capture/elimination by 12/31/2013
• 95% capture/elimination by 12/31/2018

5. Gray Program Manager Needed to
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Support Green/Gray Program
• County Required a Willing Partner to Implement
Gray while supporting Green
• Green and Gray Program Managers needed to
collaborate for Balance Green/Gray Program
• Gray Program Manager provides Planning and
Design coordination and Construction Management
for Gray Projects totaling $150 million in
construction value

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Presentation Agenda
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• Learning Objectives
• Introduction of Five Gray CSO Projects featuring
Green Infrastructure Components
• Challenges and Rewards of incorporating Green
Infrastructure
• Lower Harbor Brook Storage Fly Over

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Learning Objectives
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• Its easy being Green -Every Gray Project can be
Green
• Community becomes the Chearleader of Gray
projects with Green Components – Investment
in Public Infrastructure requires Public Support
• Need a balanced Green/Gray Program
• The large gray projects would not be feasible as
designed without green

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Greening the Gray Process Flow Chart
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Yes
Preliminary Support GI Concepts Community
Design for Green? Green Roofs Workshops
Rain Gardens
Bio Swales
Storm water reuse
No Porous Pavement
Urban Forestry
100% Educational Features
Gray
Design
Continue Gray Design
100% Green/Gray 95% Conceptual
Reviews
Design Design Design

9. Project 1. Harbor Brook Interceptor
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Sewer Replacement Project
• Gray Project
Components
▫ ARRA funding
$12 million grants,
$12 million low interest
loans
▫ 7500’ of 18” to 36”
diameter interceptor
▫ 3500’ of 36” diameter
water main
Construction on Fowler HS Grounds
▫ 2 areas of sewer
separation

10. Harbor Brook Interceptor Replacement
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Green Components
Rain garden on RTF
Site
75 Infiltrating Tree
Basins

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Project 2. Midland Avenue Conveyance
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• Green and Gray
▫ Connects major CSO to
existing RTF
▫ 96” diameter HDPE Pipeline
▫ Flushing and regulator
chambers
▫ $8 million construction
▫ 5,000 gallon Stormwater
Reuse for flushing
▫ Community selected
Educational Green
Infrastructure Trail – To
be Presented in Session
15 Public Outreach
Tuesday at 1:30pm Construction in Urban Neighborhood

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Midland Green Educational Trail
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Midland Green Educational Trail
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Project 3. Sewer Separation
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• Two urban areas
▫ one residential
▫ one commercial
• 2000’ sanitary sewer
installation
• 700’ storm sewer
installation
• 2000’ internal pipe lining
• $6 million construction
• 20 infiltration trees
• Rain Garden in
rehabilitated “pocket”
park

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Sewer Separation Pocket Park Rain Garden
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Project 4: Clinton CSO Storage Project
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• Located on site of
previously planned RTF in
Armory Square
• 6 million gallon
underground storage
facility
• $70 million construction
cost
• 77,000 gallon stormwater storage for flushing
• Two biorention basins
• Green roof on Operations

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Clinton CSO Storage Completed Site

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Clinton CSO Storage
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19. Clinton CSO Storage Reinforced Slurry
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Wall Construction

20. Project 5: Lower Harbor Brook CSO
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Storage Facility
• Located on site of
previous planned RTF
• 5 million gallon circular
below grade tank with
center flushing system
• $30 million construction
• 80,000 gallon
stormwater storage
for flushing
• Biorention basin for
stormwater capture

21. Challenges and Rewards
• Challenges • Rewards
▫ Educating the Team ▫ Community
▫ Green/Gray Design Support and
Ownership
Coordination
▫ Improves Quality of
▫ Regulatory Reviews Life
and Approvals ▫ Design and
▫ Construction Construction Team
Quality takes Pride
▫ Warranty and ▫ Lower Life Cycle
Maintenance Cost
▫ Dedicated Funding

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Up Next - Flyover
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Questions
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