Clinton Combined Sewer Overflow (CSO) Storage Facility Project - - PowerPoint PPT Presentation

Onondaga County Executive Joanne M. Mahoney

Clinton Combined Sewer Overflow (CSO) Storage Facility Project

Onondaga County Executive Joanne M. Mahoney

Bruce G. Munn, Nicholas Capozza, Ryan C. Fisher, A.J . McGinn J une 4, 2013

Onondaga County Executive Joanne M. Mahoney

Project T eam Acknowledgement

• Environmental Engineering Associates, LLP
• GHD
• O’Brien & Gere
• ARCADIS

Onondaga County Department of Water Environment Protection

• Matthew J. Millea, Deputy County Executive
• T
• m Rhoads PE, Commissioner
• Nicholas Capozza, Project Manager

Onondaga County Executive Joanne M. Mahoney

Project T eam Acknowledgement

Brierley Associates – Geotechnical Engineering

Bryant Associates – Structural Inspection Services Fisher Associates – Site/ Civil Inspection Services B&L Engineering – Site/ Traffic Design Group One Design – Architectural Design Landscape & Prospect – Landscape Architecture PB Americas – Noise Mitigation

CDM / C+S J

• int Venture – Construction Management

J ett Industries/ Kiewit Construction – General Contractor

Onondaga County Executive Joanne M. Mahoney

Project Background

• Judgment on Consent signed in 1989
• Amended Consent Judgment (ACJ) signed 1998

Capture >85% of average annual CSOs Removal of floatables Achieve water quality standards for bacteria in Onondaga Lake

• County negotiated 4th Stipulation ACJ November 2009

3.7 MG Clinton CSO storage operational by December 31, 2013 Incorporation of Green Infrastructure for CSO reduction 95% CSO Capture by December 31, 2018

Onondaga County Executive Joanne M. Mahoney

Project Location

Onondaga Lake Metro WWTP Destiny USA Clinton CSO Storage Facility Armory Square S.U. Sheraton

Onondaga County Executive Joanne M. Mahoney

Project Location

• Insert CSO map from Ed

Onondaga County Executive Joanne M. Mahoney

Key Project Goals/ Challenges

• M eet ACJ milestones and requirements

– Complete Design November 2010 – Commence Construction July 2011 – Commence Operation December 31, 2013

• Keep all CSO storage below grade

– Allow reuse of parking lot above CSO Storage – High saline content of groundwater up to 80,000 mg/ l – Comply with BMP’s for groundwater dewatering

Onondaga County Executive Joanne M. Mahoney

Key Project Goals/ Challenges

• Other County Goals

– Maximize CSO Storage – Requirement to accommodate 1 year

2 hour storm flow

– Be consistent with “Save the Rain Program”

• Local Construction Concerns

– M itigation of construction noise – Parking/ Traffic mitigation – Archeological/ Environmental concerns

Onondaga County Executive Joanne M. Mahoney

CSO Storage Facility Alternatives

• 1. Conventional Dewatering/ Construction
• 2. Tunneling Construction
• 3. Four Vertical Slurry Wall Tanks/ Cut and Cover

Conveyance

• 4. Three Vertical Slurry Wall Tanks/ Single Tunnel

Onondaga County Executive Joanne M. Mahoney

Onondaga County Executive Joanne M. Mahoney

Onondaga County Executive Joanne M. Mahoney

Onondaga County Executive Joanne M. Mahoney

Onondaga County Executive Joanne M. Mahoney

Alternative Cost Analysis

1 Cut-and-Cover (single tank) 2 Three Tunnels 3 Slurry Wall Three Tank/ Tunnel 4 Slurry Wall four tank and cut-and- cover Construction Cost $55,800,000 $36,700,000 $41,200,000 $48,800,000 Overflow Pumping Addition $3,300,000 $3,300,000 $3,300,000 $3,300,000 Contingency (20%) $11,800,000 $8,000,000 $8,900,000 $10,400,000 Subtotal Construction Cost $70,900,000 $48,000,000 $53,400,000 $62,500,000 Escalation to Construction Mid Point in 2012 (6%) $4,300,000 $2,900,000 $3,200,000 $3,800,000 Total Estimated Construction Cost $75,200,000 $50,900,000 $56,600,000 $66,300,000

Onondaga County Executive Joanne M. Mahoney

Unique Design Aspects

• Innovative Geotechnical

Approach

Slurry diaphragm wall

construction

Jet grout plug and sheeting

groundwater containment

Open face + closed face

TBM options

• Specialized Construction

Prequalification

Jet grouting Tunneling

• Project Labor Agreement

Provisions

Union work force Exemption from Wicks Law One construction contract

Onondaga County Executive Joanne M. Mahoney

Use of Green T echnologies

• Recovery and reuse of storm drainage flows for CSO

Storage Cleaning

• Bioswales and storm flow treatment
• Green roof on West Chamber
• Use of LED site lighting and parking lot lighting
• “Flow through by gravity” design

Onondaga County Executive Joanne M. Mahoney

Construction Approach

• Project Bid July 2011 - $70,640,000

– General Contractor - Jeff Industries/

Kiewit Construction

• Contract Awarded August 2011
• Revised Construction Approach

Reinforced concrete box tunnels vs. circular

tunnels

Onondaga County Executive Joanne M. Mahoney

Facility layout

Onondaga County Executive Joanne M. Mahoney

West Chamber

Onondaga County Executive Joanne M. Mahoney

West Structure

Onondaga County Executive Joanne M. Mahoney

East Chamber

Onondaga County Executive Joanne M. Mahoney

Onondaga County Executive Joanne M. Mahoney

Onondaga County Executive Joanne M. Mahoney

Onondaga County Executive Joanne M. Mahoney

Onondaga County Executive Joanne M. Mahoney

Onondaga County Executive Joanne M. Mahoney

Onondaga County Executive Joanne M. Mahoney

Project Status

• Project is 70% complete
• Scheduled for operational December 31, 2013
• 12 month start up and performance period,

December 31, 2014

• Project updates to follow

Onondaga County Executive Joanne M. Mahoney

QUES TIONS?

Onondaga County Executive Joanne M. Mahoney

Bruce Munn bruce.munn@ghd.com (315) 679 5800

Onondaga County Executive Joanne M. Mahoney