UPDATE ON DWSD’S LONG TERM CSO CONTROL PLAN Presented to: Board of Water Commissioners May 12, 2010.

Slides:



Advertisements
Similar presentations
The CSO Abatement Project Presented by: Paul Nordstrom Director of Operations and Engineering.
Advertisements

Onondaga County CSO Abatement Gray Project Update.
Wakulla County Sewer Project Eutaw Utilities Presentation April 7, 2011.
Detroit WWTP NPDES Permit Informational Meeting Michigan Department of Environmental Quality October 23, 2014.
WHAT IS GREEN INFRASTRUCTURE ? Khris Dodson, Environmental Finance Center November 17, 2010.
City of Clinton Fiscal Year 2013 Sewer Rate Recommendations Committee of the Whole April 24, 2012.
Evaluation of Private Property I/I Sources for Sanitary Sewer Evaluation Study City of Grand Rapids – E. Leonard Heights Area Presenter: Jay Zawacki, CDM.
Presented by NEORSD Richard J. Switalski, P.E. Presented by NEORSD Richard J. Switalski, P.E.
October 20-21,2009 Agenda Item 6a.. Ohio River CSO Communities Pennsylvania – 10 communities West Virginia – 10 communities Ohio – 10 communities Kentucky.
District of Columbia Stormwater Fees October 27, 2008 Apartment and Office Building Association of Metropolitan Washington Brendan Shane DDOE Office of.
The Metropolitan District Clean Water Project Update Connecticut Watershed Network Conference May 11, 2012.
Evaluation of CSO Control Alternatives in Small Communities Michael Sullivan Limno-Tech, Inc.
1 What is Green Infrastructure and How Does It Reduce Wet Weather Issues? Making natural systems work for us: using soil and vegetation - rather than concrete.
1 Wastewater Capital Improvement Program (CIP) Large Users Meeting March 15, 2010.
0 Scoring Community Development Block (CDBG)Grants Water/Sewer Apps April 8, 2013 SEIRPC CDBG Scoring Committee.
Cuba’s Future Development Needs, Funding Models, and Alternatives. A Perspective of the Operation of a Cuban Water & Sewer Utility. Eduardo Vega-Llort,
2013 Stormwater Workshop June 13, 2013 Sponsored By Michiana Stormwater Partnership John J. Dillon Director, LTCP Management City of South Bend.
Spokane River Forum Conference March 26,  About 1/3 of City  130 outfalls.
CSO Strategies & Financial Management Mayor Gregory A. Ballard City of Indianapolis December 9, 2010.
Spokane River Forum 23 May 2011
Water Treatment for NYC Croton Schematic. NYC Filtration Plant for Delaware and Catskill Systems  Filtration avoidance criteria  Alternatives to Filtration.
NYC Green Infrastructure Program
SUSTAIN Pilot Study April 25, 2012 Curtis DeGasperi King County
District of Columbia Water and Sewer Authority Fort Stanton (CSO 006) Separation Project - Status and Coordination Update - for the Environmental Quality.
CMMA 2010 Owners Session George Robinson II, M.B.A., C.B.A. Commissioner.
Developing Final Phase II WIPs and Milestones Katherine Antos Chesapeake Bay Program Office Jenny Molloy Water Protection Division DC Draft Phase II WIP.
Nutrient Management in the Urban Landscape Rebecca Kluckhohn, P.E. Watershed Engineer West Metro Water Alliance Forum, May 18 th 2011 W W e n c k Engineers.
Detroit WWTP NPDES Permit Informational Meeting Michigan Department of Environmental Quality October 17, 2013.
Independent Review of FY 2008 Proposed Rates D.C. Water and Sewer Authority Public Hearing June 13, 2007.
THE FOSTER GROUP TFGTFG Detroit Water & Sewerage Department Capital Improvement Program Statistics – Sewage Disposal System.
THE FOSTER GROUP TFGTFG City of Detroit Water and Sewerage Department Wholesale Customer Rates Meeting Sewage Disposal System Meeting #4 Preliminary Proposed.
Updated Estimates of Impervious Area, Equivalent Residential Units, IA Rate, and Customer Bill Impacts AOBA October 27, 2008.
1 District of Columbia Water and Sewer Authority George S. Hawkins, General Manager August 29, 2012 Revised August 30, 2012 Operating Agency Workgroup.
Briefing on IMA Negotiation Issues Presented to: Blue Plains IMA Negotiating Team Operating Agency Work Group March 11, 2010 District of Columbia Water.
1 Discussion Points for IMA Participants – Flow Studies December 19, 2006 District of Columbia Water and Sewer Authority.
THE FOSTER GROUP TFGTFG City of Detroit Water and Sewerage Department Wholesale Customer Rates Meeting Water Supply System Meeting #3 – Allocated FY
Wastewater Treatment Plant # 2 Engineering Services Council Workshop July 8, 2014.
Town of Genoa October 6, Agenda Why are we here? Background Capacity Analysis & Facilities Plan Preferred Alternative Board Direction Implementation.
Metropolitan Council Environmental Services A Clean Water Agency Proposed Combined Sewer Overflow Changes Environment Committee March 11, 2008 Keith Buttleman.
Approaches to CSO Control Adrienne Nemura, P.E. Limno-Tech, Inc.
Frederick A. Laskey Welcome to the EBC Breakfast Meeting The CSO Program Update Frederick A. Laskey Executive Director Massachusetts Water Resources Authority.
Fixing Our City’s Old Sewers How the state is helping In early 2015, New Jersey issued new permits to the 25 communities and sewage treatment plants that.
Using New Jersey’s State Revolving Fund to Reduce Combined Sewage Flooding in Camden City Andrew Kricun, P.E., BCEE Executive Director / Chief Engineer.
Time is money. Use yours wisely. Bryan McCabe, PE | Pender County Utilities J. Ray Cox, PE | Highfill Infrastructure Engineering.
Water System Master Plan & Rate Study City of DeKalb, Illinois City Council Presentation May 16, 2015.
Aaron Cosentino City of Elgin Rob Linke, P.E., CFM Trotter & Associates, Inc. Lord Street Basin CSO Green Infrastructure Retrofit Project November 14,
City of Fernley, Nevada – 164 th Ave. NE, Suite 300, Redmond, WA April 18, 2007 Rate Study Findings Water and Sewer Utility Rates.
Funding Great Lakes Sewage Infrastructure: Why It’s Critical to Improving Water Quality July 25, 2012 Adam Krantz Managing Director, Government & Public.
FY 2016 Water & Sewer Rates Presented by: The Department of Public Works Works.
Operating Efficiencies Costs to operate and maintain the water and sewer system have not varied significantly during the first 5 years of operation.
City of Fernley, Nevada – 164 th Ave. NE, Suite 300, Redmond, WA April 18, 2007 Rate Study Findings Water and Sewer Utility Rates.
1 Highland Water District CAPITAL IMPROVEMENT PLAN.
Miami-Dade Water & Sewer Department Miami-Dade Water and Sewer Department |  1   Reuse, Every Drop Has Value Seminar FPL JPA.
1 TIF 9 (Trinity River Vision) Expanded and Updated Project and Financing Plans December 8, 2009 Presented to the City Council Jay Chapa Housing & Economic.
Status Update on USEPA Compliance Sausalito City Council February 26, 2013 SMCSD Directors Raymond Gergus, President Bill Ring, Vice President Ann Arnott.
Village of Villa Park October 24, 2016 Washington Street Combined Sewer Separation Project.
Proposed Draft Financial Plan April 10, 2017
Presented by Tom Heinemann, CH2MHILL October 2, 2013
Update on PI Modeling and Nitrogen Removal at Blue Plains
Water & Wastewater Capacity Charge Work Shop
SPU Modeling & Monitoring
Manchester’s CSO Program: A Look Behind and a Look Ahead
City of Sisters, OR 2017 Water & Sewer Rate Study
Town of Melbourne Beach
City of Noblesville Wastewater Utility
Natural Environment: 0% Impervious Surface Built Environment:
Early Learning Facilities
[OUR CITY NAME]’S OLD SEWERS
Fixing Our City’s Old Sewers
2018 Water/Wastewater Rate Study and Financial Forecast
Presentation transcript:

UPDATE ON DWSD’S LONG TERM CSO CONTROL PLAN Presented to: Board of Water Commissioners May 12, 2010

Topics to be Covered 1.System Configuration Before CSO Controls (pre-1995) 2.CSO Controls 1995 – 2008: Rouge River National Demonstration Grant Projects Original (1996) Long Term CSO Plan Projects 3.Recent Developments Submittal of Long Term CSO Plan Update (October, 2008) Financial Crisis: Termination of URT($1 B) and DRO-2 ($300 M) Analysis of less costly CSO Alternatives (2009 – 2010) 4.Recommended Future CSO Control Projects: Future Rouge River CSO Control Facilities Green Infrastructure Program Future Detroit River CSO Control Facilities

Pre-1995 CSO Discharges in Detroit 76 permitted outfalls (33 to Rouge River and 43 to Detroit River) ~ 50 discharge events/year (average); ~ 20 billion gallons discharged/year; Major impact on Rouge River water quality:  Dissolved Oxygen depletion  Bacteria exceedances  Sediment deposits and bank erosion Lesser impacts on Detroit River:  Bacteria exceedances

Location of Pre-1995 CSO Outfalls

1989 NPDES Permit: Original CSO Control Requirements 1989 NPDES Permit initially required ALL Rouge River CSO Outfalls to be treated/disinfected by Retention Treatment Basins by August, 2005; DWSD contested the permit and then negotiated a settlement requiring:  3 “Demonstration” Basins: Hubbell-Southfield; Puritan-Fenkell and 7 Mile West (constructed in );  6 In-System Storage “Task 1” control gates (installed 1996)  Prepare a “Long Term CSO Control Plan” (submitted July, 1996)

1996 Long Term CSO Control Plan Recommended Projects WWTP Primary Treatment Capacity Increase Conner Creek CSO Basin Leib Screening & Disinfection Facility St. Aubin Screening & Disinfection Facility Baby Creek Screening & Disinfection Facility Upper Rouge CSO Tunnel (“URT”) Additional In-System storage gates Belle Isle CSO Basin* Oakwood CSO Basin, P. Station & Sewer Improvements* * Projects added after the Long Term Plan was submitted in 7/96

Detroit’s CSO Facilities (as of 2008)

CSO Project Costs (Construction Start ) Hubbell-Southfield Basin (1994): $ 58.9 M Puritan-Fenkell Basin (1995)$ 18.1 M 7 Mile Basin (1996):$ 14.9 M Task 1 In System Storage (1996): $ 3.4 M St. Aubin S&D Facility (1999): $ 19.8 M Leib S&D Facility (1999):$ 33.4 M WWTP Expansion (2000):$ M Conner Creek CSO Basin (2001)$ M In-System Storage Devices (2002):$ 30.8M Baby Creek S&D Facility (2003): $ 76.1 M Belle Isle CSO Basin (2005):$ 16.1 M Oakwood Basin & P. Sta. (2007)$ M Oakwood Sewer Improvements (2008) $ 15.0 M $1,593 M

Benefits of CSO Control Program

October, 2008 Update to Long Term CSO Control Plan Assumed completion of URT tunnel by 2015 (construction to begin on 1 st tunnel segment in 2008) Recommended that 41 Detroit River CSO outfalls be controlled with innovative Disposable Net + In-Pipe Disinfection technology Work to be undertaken over 20 year period: 2010 – 2030 Estimated construction cost = $ 185 M (2009 $) MDNRE informally expressed concurrence with the Plan recommendations, but has not responded in writing

Original Upper Rouge CSO Tunnel Schematic Drawing

Key Facts re: Upper Rouge CSO Tunnel 30′ diameter tunnel; 7 miles long; 150’ underground 215 million gallons capacity Would reduce CSO discharges to < 1/year Controls 17 Detroit CSOs and 11 suburban CSOs Includes 100 mgd Pump Station and 14 Drop Shafts 10 surge control surface structures in Rouge Park Construction period: 2008 – 2015 Construction cost = $880 million as of 2/09; expected to escalate to $1 billion after all 8 contracts bid 83% of costs allocated to Detroit customers

Projected CSO Debt Load with URT Tunnel

DWSD’s Permit Modification Request due to Economic Hardship MDNRE approval sought to eliminate URT Project and DRO- 2 Outfall based on economic hardship, including: Population Decline/Loss of Customer Base Job Losses and Manufacturing Declines Housing Data: SEV, Taxable Value Water Sales; Projected Revenues and Rates Actual CSO Control Project Expenditures >> Estimates Detroit sewer costs as a % of Median Annual Household Income > EPA’s 2% threshold for “affordability”

NPDES Permit Requirement re: Study of CSO Control Alternatives DWSD required to analyze alternative CSO Controls Initial report due: December 15, 2009 Initial recommendation: Build $484 M smaller CSO tunnel (“URT-2”) with ~ 3.2 untreated overflows/yr MDNRE requests 90 day Supplemental Study to examine other alternatives to avoid dispute on approvability of URT-2 recommendation Supplemental Report submitted April 30, 2010

1.Reduce capital cost as much as possible; 2.Utilize an extended implementation schedule to reduce impact on rate payers and allow time for Detroit’s economic recovery; 3.Minimize O&M costs by limiting the number of new CSO facilities; 4.Achieve in-stream water quality comparable to what would have resulted from the URT project; 5.Incorporate “Green Infrastructure” activities to the extent they are feasible, cost effective and beneficial (i.e. reduce or retard runoff); 6.Consider the cost impacts of ongoing projects (Oakwood, Baby Creek remedial measures, TRC Minimization, etc.) as part of the overall CSO program implementation schedule. Guiding Principles for CSO Alternative Evaluation

Alternatives Evaluated by DWSD Conventional CSO Technologies: Storage Tunnels Retention Treatment Basins Vertical Shafts West Arm Interceptor Extension Screening & Disinfection First Flush Tanks Disposable Nets w/Disinfection Vortex Separators In-System Storage Green Infrastructure Options: Downspout disconnection Re-vegetate vacant lots Bioswales & rain gardens Rain Barrels Green roofs Tree planting/Urban Forest Demolish abandoned structures Porous Pavement Curb bump outs Roadside Tree Trenches

Supplemental Report Recommendations Replace URT tunnel with a series of innovative, end-of-pipe treatment systems consisting of:  First Flush storage tanks at multiple outfalls  Connecting sewers to eliminate small outfalls  Disposable Net installations to screen out sanitary trash  Disinfection by chemical injection of NaOCl into existing sewers far enough upstream from overflow point to allow contact time for effective bacteria kill Limit capital expenditures for CSO Projects to < $35 M/yr to stay within Detroit’s Financial Capability Establish a 25 year schedule for program (including both Rouge River and Detroit River CSO outfalls) Implement a Green Infrastructure program to reduce stormwater flow tributary to combined system Demonstrate new CSO control technology with Pilot Projects

Ongoing Projects ($63 Million): Oakwood Sewer Improvements (3 remaining segments): $59 M Baby Creek Remedial Measures (NaOCl feed, mech. mixers, emerg. bypass): $3 M TRC Minimization & In-Stream Assessments: $1 M New Projects ($791Million): Hubbell-Southfield Basin Improvements: $3 M Task 1 In System Gate renovations: $5M Carbon, Fort St. Outfall eliminations: $1 M 2 Pilot Projects (First Flush Tank + Disp. Nets 7 Mile East & Pembroke: $41M Glenhurst outfall diversion and pump station: $3 M Replace URT Tunnel with First Flush Tank/Disposable Net/In-Pipe 383 M RRO-2 shallow conduit in lieu of DRO-2 outfall (2 construction contracts): $130 M Re-invest in existing CSO Control Facilities: $40 M Control of Detroit River CSO Outfalls using Disposable Nets/In-Pipe $185M Recommended Conventional CSO Control Projects

Comparison of URT and Current Recommendation for Upper Rouge Outfalls Original “URT” 30’ Diameter 7 Miles long 201 MG capacity 17 CSO Outfalls 100 MGD Pump Station Includes Redford, Dearborn Hts flow 1 Overflow/yr (untreated) 850,000 gal/yr discharged (untreated) $880 Million capital cost $1.5 Million annual O & M cost 2008 Construction Start Concurrent Tunnel Contracts 7 Year Construction Period $126 M/yr Avg Cost (over 7 year constr. period) First Flush Tank Alternative 9 First Flush Tanks 13 Outfalls w/Disposable Net Installations 13 Chem. Storage/Pumping Sites > 24 Chemical Injection Points 34.6 MG capacity Includes Redford, Dearborn Hts flow ~ 13 Overflows/yr (treated) 1.2 B gal/yr discharged (treated) $ 426 Million capital cost $2.83 Million annual O & M cost 2012 Construction Start: Pilot Projects Only Sequential Construction Contracts 25 Year Construction Period $20 M/yr Avg Cost (over 25 year constr. period)

Recommended “Green Infrastructure” Program Rationale for including Green Infrastructure: Expected to reduce inflow to combined sewers by at least 10% - 20% upon completion; Provides quick water quality benefit while conventional CSO facilities are designed, sited, financed and built; Acknowledges the ongoing demographic and population changes that are profoundly affecting the tributary area; Consistent with the Mayor’s objective to remove abandoned homes and deal with urban blight Consistent with approach being used in many other urban areas (Philadelphia, Portland, Cincinnati, Washington D.C.)

Proposed “Green Infrastructure” Activities Disconnect residential downspouts and, where feasible, commercial and industrial downspouts; Demolish and remove vacant structures, seal pipes and re-vegetate the parcel to return it to pervious cover; Use bioswales and tree trenches along roadways and parking lots to intercept runoff and reduce stormwater inputs; Plant trees for uptake and evapotranspiration along roadways and open spaces; Implement activities on municipally-owned land, focusing on managing stormwater runoff in under-utilized parks

Phasing Of Recommended Projects Proposed Implementation Schedule: > 25 years (beyond 2034); Stage Projects in multiple 5-Year Phases; Spread out new CSO Project construction to average <$35 Million per year as a target “manageable” level of new debt; Accelerate funding of Green Infrastructure projects early in the implementation plan to achieve immediate beneficial results while conventional facilities are designed and built; Green Infrastructure Budget Recommendation: $3 Million/Year for first 10 years (2010 – 2019) $2 Million/Year for next 10 years (2020 – 2029) In addition to these DWSD sewer revenues, also pursue grants, loans, support from foundations and private stakeholders

Recommended Phase I CSO Control Projects (2010 – 2014) PHASE I ( ) : Const. Cost: Oakwood Sewers Segments 2,3: $44 M Baby Creek Remedial Measures: $ 2 M Carbon, Fort St outfall elimination: $ 1 M TRC Minimization + In-Stream Evaluations: $ 1 M Hubbell-Southfield Improvements: $ 3 M Task 1 In-System Gate renovations: $ 5 M Pembroke outfall First Flush Pilot Project: $24 M RRO-2 segment 1 (WWTP work):$30 M Green Infrastructure Program:$15 M PHASE I SUBTOTAL:$125 M

Recommended Phase II CSO Control Projects (2015 – 2019) PHASE II ( ): Const. Cost: Oakwood Sewers Segment 4:$ 15 M 7 Mile East Pilot Project:$ 17 M Glenhurst Pump Station/Diversion:$ 3 M RRO-2 Segment 2 (outfall conduit):$100 M Re-investment in existing CSO facilities:$ 10 M Detroit River CSO Outfalls*:$ 34 M Green Infrastructure Program: $ 15 M PHASE II TOTAL:$194 M * specific outfalls to be undertaken in Phase II not yet identified

Future Phases (2020 and beyond) Continue Green Infrastructure Program through $2 M/Yr ($50 M total Green investment); Continue re-investment in existing CSO Control Facilities; Undertake new CSO Control Facilities along Rouge River and Detroit River based on re-evaluation of Detroit’s Financial Capability every 5 years (presumably Disposable Nets with In- Pipe Disinfection Systems assuming Pilot Projects demonstrate that the new technology performs as expected)

Factors That Could Affect CSO Schedule Time period needed by Detroit to achieve economic recovery; Financial solvency of the City and ability to sell bonds to finance capital improvements; Demographic changes in the tributary area which affect wet weather flows; Green Infrastructure progress and stormwater flow reductions actually achieved; Availability of low interest SRF loan money or grant funding; Expenditures needed for new regulatory requirements (e.g. de-chlorination); Need for additional re-investment in existing CSO facilities; Cost of non-CSO capital improvement projects

Comparison: Then and Now ( 2008 vs 2010 CSO Program Costs) 2008 Projects: URT (201 MG)$1,000M Oakwood Sewers$ 59M Baby Creek$ 2M Carbon/Fort St elimination$ 1M TRC Minimization$ 1M WWTP outfall (DRO-2) $ 299M Future Detroit River CSOs$ 185M TOTAL $1,547M Average Cost/Yr : $169 M/yr Note: 2008 CSO Program did not included a budget for ongoing re-investment in existing CSO facilities Projects: 2 Pilot Projects: $ 41 M Glenhurst outfall $ 3 M Remaining Upper Rouge Outfalls $383M Oakwood Sewers $ 59 M Baby Creek $ 2M Carbon/Fort St elimination $ 1M TRC Minimization $ 1M Task 1 Gate renovation: $ 5 M RRO-2 outfall $130M Re-invest in CSO Facilities $ 43M Future Detroit River CSOs $185M SUBTOTAL $ 853 M Green Infrastructure $ 50 M TOTAL $ 903 M Average Cost/Yr : $ 21 M/yr

Comparison of 2008 and 2010 CSO Control Programs (estimated construction cost/yr)

Next Steps Meet with MDNRE to negotiate CSO project schedules MDNRE to modify NPDES Permit with new CSO project schedule Design Pembroke Pilot Project for First Flush Tank + Disposable Net + In-Pipe Disinfection System Design new RRO-2 outfall (1 st WWTP) Develop and implement Green Infrastructure program (with other City Departments) Complete TRC Minimization Program and evaluate alternative disinfection systems

Questions