Massachusetts Water Resources Authority Joint Public Advisory Commission

Massachusetts Water Resources Authority Joint Public Advisory Commission Public Forum MWRA at 30: Then and Now Frederick A. Laskey Executive Director July 14, 2015

MWRA Service Area • MWRA provides wholesale water and wastewater services to over 2. 5 million customers in 61 communities • On average, MWRA delivers an average of 200 million gallons per day to its water customers, with a peak demand of 350 million gallons • MWRA collects and treats an average of 350 million gallons of wastewater per day, with a peak capacity of 1. 2 billion gallons

Make-Up Of MWRA Service Area • 51 communities that get water service – over 6, 000 miles of water pipe • 43 communities that get sewer service • Of those, 30 get both water and sewer – 39 Towns – 20 Cities – 1 Fire District – 37 Boards of Selectmen – 20 Mayors – 3 Council Presidents 3

Violation Of The Clean Water Act • In 1982 and 1983, civil suits were filed against the MDC and other state agencies claiming that the Massachusetts Clean Waters Act had been violated as a result of discharges of untreated and partially treated sewage from Nut and Deer Islands

A New Agency Was Needed • MDC was determined to be unable to fulfill its mission • Comprehensive legislation was ready for consideration by the legislature in 1984 • But over the summer, progress was slowed as lawmakers, regulators, lawyers, environmentalists and citizens wrangled over the details • A Federal Judge brought the process to a head by declaring a moratorium on new sewer hookups

On July 1, 1985, The MWRA Opened • MWRA assumed responsibility for the water and sewer infrastructure serving greater Boston, and to end the pollution of Boston Harbor from obsolete treatment plants • MWRA was created as an independent authority charged with raising its revenue from ratepayers, bond sales and grants • MWRA had to establish wholesale water and sewer rates to cover all costs, including a massive capital program to repair and upgrade the systems • MWRA was also charged with promotion and enforcement of water conservation and planning for the future • In compromise with Western and Central Massachusetts, MDC retained watershed management, but MWRA covers costs 6

What did we inherit? 7

Two Obsolete Wastewater Treatment Plants

Raw Sewage Pouring Into Boston Harbor Daily 9

Dry Weather CSOs 10

On The Water Side, Things Were Pretty Grim • Thousands of miles of aging pipelines were leaking millions of gallons of water • No plans were in place for upgrades to carry the water system into the next century • And the Northeast Drought of the late 1960 s cast doubt on the adequacy of existing sources • Little covered storage – Open reservoirs after treatment – Crude and inconsistent disinfection 11

Gaseous Chlorine 12

And A Lot Of Leaky, Old Pipes

Neglected Dams And Unprotected Watersheds

And A Lot Of Leaky, Old Pipes

Tuberculated Pipe

And A Lot Of Leaky, Old Pipes

Leaking Valve Assembly

Water System Demand Exceeded Safe Yield 1987 19

Studies For Alternative Sources • The Northfield Project was a proposal for skimming Connecticut River spring flood flows and diverting them into the Quabbin Reservoir

What did we have to do? 21

MWRA’s $7 Billion Capital Improvement Program $ 177 $ 180 $ 171 $ 138 $ 155 $ 138 $ 139 $ 211 $ 182 $ 196 $ 178 $ 152 $ 168 $ 297 $ 365 $ 333 $ 392 $ 447 $ 377 $ 194 $ 149 $ 102 $ 44 $0 $ 24 $100 $ 120 $200 $ 196 $ 304 $300 $ 437 $ 504 $ 413 $400 FY 86 FY 87 FY 88 FY 89 FY 90 FY 91 FY 92 FY 93 FY 94 FY 95 FY 96 FY 97 FY 98 FY 99 FY 00 FY 01 FY 02 FY 03 FY 04 FY 05 FY 06 FY 07 FY 08 FY 09 FY 10 FY 11 FY 12 FY 13 FY 14 FY 15 FY 16 FY 17 FY 18 $ Millions $500 $ 498 $ 608 $600 $ 580 $700 Boston Harbor Project Deer Island Asset Protection Metro. West Supply Tunnel Hultman Aqueduct Rehab Spot Pond Supply Mains Covered Storage Projects Braintree-Weymouth Relief Facilities Weston Aqueduct Supply Mains UV Treatment Carroll Water Treatment Plant Union Park East Boston Branch Sewer South Boston CSO Community Managed CSO Projects

80% Of Capital Spending Has Been Mandated $700, 000 Mandated (Court & Consent Orders) $600, 000 $400, 000 Non-Mandated $300, 000 $200, 000 $100, 000 18 FY 16 FY 14 FY 12 FY 10 FY 08 FY 06 FY 04 FY 02 FY 00 FY 98 FY 96 FY 94 FY 92 FY 90 FY 88 FY 86 $0 FY $ Thousands $500, 000 23

Restore One Of The World’s Greatest Water Systems Quabbin Reservoir Storage: 412 billion gallons Depth: 150 feet Length: 17. 9 miles Width: 3 miles Wachusett Reservoir Storage: 65 billion gallons Depth: 129 feet Length: 8. 5 miles Width: 1 mile 24 24

An Civil Engineering Marvel – – – 102 miles of active transmission mains and tunnels (43 miles on standby) 284 miles of distribution mains with over 4, 700 valves About 85% of the water is delivered by gravity 11 pump stations 5 years of storage 25

Words To Live By “…as we progress and find that we can control the quality of the water by our own acts, we realize it is a wicked thing to turn water containing a large amount of organic matter into a city or town for people to drink – children, invalids and people whose constitutions are too weak to overcome the effects of bad water. I think we should realize the responsibility that rests on us as superintendents and engineers to do all that we can to raise the standard; to insist that a city or town should have good water and that they should judiciously spend enough to make it good. ” -Desmond Fitzgerald, Boston Water Works 1895 annual meeting of the New England Water Works Association 26

John J. Carroll Water Treatment Plant • Completed in July 2005 • Treatment Processes: – Ozonation for primary disinfection – Corrosion control – Chloramination for secondary disinfection – Fluoridation 27

Addition Of Ultraviolet Light Disinfection • New regulations required that unfiltered systems must have two primary disinfectants, one of which must achieve Cryptosporidium inactivation • UV facilities at the Carroll Treatment Plant came on-line in April 2014 28

UV Header Pipe 29

MWRA Metropolitan Area Storage Capacity Over Time

Covered Storage Projects • MWRA has built six new covered storage tanks to replace all open reservoirs • The last one is just about complete 31

Spot Pond Covered Storage And Pump Station 32

Metro. West Water Supply Tunnel • The Metro. West Water Supply Tunnel was brought on-line in November 2003 • By March 2004, the Tunnel was being fully utilized allowing the shutdown of the Hultman Aqueduct for repair 33

Hultman Aqueduct Rehabilitation • Since 2013, for the first time since originally planned in the 1930 s, the Metropolitan Water System has redundancy for the Hultman Aqueduct from Marlborough to Weston 34

Water Pipeline Rehabbed Or Replaced • 81 miles of MWRA-owned pipeline • 474 miles of community-owned pipeline 35

State-Of-The-Art Monitoring System

s: : can Parameters Monitored At 18 Locations • • • p. H Temperature Conductivity Turbidity Dissolved Organic Carbon Total Organic Carbon Nitrate-N UV 254 Oxidation-Reduction Potential Monochloramine Free Chlorine Total Dissolved Solids

Investments In Watershed Protection • Since 1985, $133 million has been invested in land preservation • So well protected, the Safe Drinking Water Act requires only disinfection Watershed % of Watershed Wachusett Reservoir 56% Ware River 62% Quabbin Reservoir 80%

Wachusett Watershed Protected Land: 1985 - 2014 1985 Fee 1985 -2014 Fee, WPR Other Protected Lands

Fecal Coliform Sampling Results At Wachusett Reservoir Percent Of Samples With Counts >20/100 ml 90 80 70 60 50 40 30 20 10 0 1993 1996 1999 2002 2005 2008 40

Community Total Coliform Rule Compliance 12. 0 11. 0 10. 0 9. 0 % TC Positive 8. 0 7. 0 6. 0 Standard = 5% 5. 0 4. 0 3. 0 2. 0 1. 0 0. 0 Jan-91 Jan-09 41

Disinfection By-Products 120. 0 EPA Standard TTHMs, ug/L 100. 0 80. 0 60. 0 40. 0 20. 0 Q 1 -90 Q 1 -91 Q 1 -92 Q 1 -93 Q 1 -94 Q 1 -95 Q 1 -96 Q 1 -97 Q 1 -98 Q 1 -99 Q 1 -00 Q 1 -01 Q 1 -02 Q 1 -03 Q 1 -04 Q 1 -05 Q 1 -06 Q 1 -07 Q 1 -08 Q 1 -09 Q 1 -10 Q 1 -11 Q 1 -12 Q 1 -13 Q 1 -14 Q 1 -15 Carroll TP - July 2005 42

11 5 6 4 8 7 7 7 8 8 10 10 15 14 13 13 12 11 14 17 19 19 17 16 20 25 30 Lead Action Level = 15 ppb 48 50 44 40 40 Lead Levels (ppb) Lead Levels In MWRA Communities 80 71 70 64 60 0 y -y M M y M -y M M y M -y M M y M -y M M y M -y M M y M -y M M y M -y M M y M -y M M y M -y M M M 43

19 80 19 81 19 82 19 83 19 84 19 85 19 86 19 87 19 88 19 89 19 90 19 91 19 92 19 93 19 94 19 95 19 96 19 97 19 98 19 99 20 00 20 01 20 02 20 03 20 04 20 05 20 06 20 07 20 08 20 09 20 10 20 11 20 12 20 13 20 14 Million Gallons Per Day Water Conservation Worked 350 325 300 Safe Yield 275 250 225 200 175 150 44

Boston’s Usage Is At A 110 -Year Low

Collateral Issues • Size of the treatment plant • Storage size and water age • Plumbing issues • Rate setting 46

Hourly Flows By Month - 2014 405 mgd Monthly Maximum Monthly Median 270 mgd 165 mgd Monthly Minimum Month Percentage of flows lower than 165 mgd

On The Wastewater Side • The 15 -year, $3. 8 billion Boston Harbor Project was completed in 2001 • About 380 million gallons of wastewater is treated at the new Deer Island Treatment plant every day, with a peak capacity of 1. 2 billion gallons • Treated wastewater is discharged 9. 5 miles out into the deeper waters of Massachusetts Bay 48

Metals In Deer Island Effluent 1000 900 800 Effluent metals (lbs/day) 700 600 500 400 300 200 100 0 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 Zinc Copper Nickel Lead Chromium Silver 49

Solids In Deer Island Effluent 180 160 Effluent solids (tons/day) 140 120 100 80 60 40 20 0 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 Deer Island Nut Island Sludge 50

The Harbor Continues To Recover • Water quality in Boston Harbor continues to improve dramatically – Sewage solids discharged from Deer Island have been reduced by 85% – Toxic pollutants have been reduced by 90% – Water is three times as clear 51

Deer Island Construction 52

Deer Island Construction 53

Jul-02 Jul-01 Jul-00 Jul-99 Jul-98 Jul-97 Jul-96 Jul-95 Jul-94 Jul-93 Jul-92 Jul-91 Jul-90 Jul-89 Jul-88 Jul-87 Jul-86 Jul-85 Pumping Capacity, MGD Sewer System Pumping Capacity 1, 400. 0 1, 200. 0 1, 000. 0 800. 0 600. 0 400. 0 200. 0

Combined Sewer Overflow Control Program • Five communities - Boston, Brookline, Cambridge, Chelsea and Somerville - have combined sewer systems that connect to MWRA's sewer system • Since 1996, 94 miles of new storm drains and sanitary sewers have been installed 55

South Boston CSO Tunnel 56

Brookline Overflow Conduit 57

Union Park Detention/Treatment Facility 58

Annual CSO Volume Has Been Reduced Dramatically • $900 million program • 32 of 35 projects have been completed to date • Annual CSO volumes have already been reduced by 2. 7 billion gallons • By 2015, 93% of the remaining CSO flows will be treated 3. 5 (Billion Gallons) 3 2. 5 2 1. 5 1 0. 5 0 1988 1992 Untreated 2011 Treated 2015

Dramatic Improvements In Water Quality – Even In Wet Weather 1987 -1998 (Before Secondary Treatment and South System transfer) 1999 - 2014 (After Secondary Treatment and New Outfall) 1987 - 1991 1999 - 2014 Average Enterococcus counts in Boston Harbor in wet weather The lighter the blue, the better 60

And We Love Being Green! • Of our $40 million annual energy budget, $22 million comes from renewable sources 61

Water System Profile • About 85% of the water is delivered by gravity Carroll Water Treatment Plant 62

Hydroelectric Power 63 63

Methane Utilization At Deer Island • 98% of methane is utilized 64

Solar Power 65

Wind Power 66

Public Access 67

Alewife Stormwater Wetland 68

Aqueduct Trails 69

What have we learned? 70

Utility Conflicts Abound In Older Cities 71

(And It’s Nothing New) 72

Creative Construction Technologies • Means and methods • New technologies are developed all the time • Need to choose the right tool for the job • If it seems too good to be true, it probably is 73

Microtunneling East Boston Branch Sewer 74

Pipebursting East Boston Branch Sewer 75

Soft-ground Tunneling South Boston 76

Slurry Walls For South Boston Pump Station 77

Horizontal Directional Drilling The Fore River Siphon 78

Horizontal Directional Drilling Mill Cove Siphon 79

Wachusett Aqueduct Pumping Station 80

But No Matter How Well You Plan… …things can go wrong 81

A Water Main Break 82

A Geyser 83

A Sinkhole 84

Another Sinkhole 85

A Heave In The Street 86

A Pipeline Collapse 87

Future challenges 88

How Clean Is Clean? • NPDES Permit • MS 4 Stormwater • Pharmaceuticals 89

Continued Maintenance Craft Hour by Work Orders Type FY 14 • • Preventive Maintenance Predictive Maintenance Corrective Maintenance Emergency Work Orders Preventive and Predictive; 0. 33448249 2108437 Corrective and Project ; 0. 66551750 7891568 Emergency Number and Type of Work Orders • • 67, 000 work orders completed per year Less than 0. 1% are emergency Corrective and Project; 0. 2149189 66920743 ; 0. 0005920 224968548 81 Preventive and Predictive ; 0. 7844890 10582403

Climate Change In Our Service Area • Currently, we average 104 rain events per year with an average of 44 inches of rainfall • Models suggest we’ll see longer dry spells with shorter, heavier rain • For an overall modest increase in total rainfall 91

Large Reservoirs With Large Storage Capacity + More Precipitation = Plenty Of High Quality Water 92

Drinking Water System Is In Good Shape • Quabbin Reservoir, Belchertown – 65 miles west of Boston – Elevation 528 feet • Wachusett Reservoir, Clinton – 35 miles west of Boston – Elevation 395 feet • Water treatment plant is in Marlborough • 85% of water delivered by gravity • Lowest elevation of a water tank is 192 feet above sea level 93

On The Wastewater Side, Sea Level Rise Was Anticipated In The Design of Deer Island Treatment Plant • Deer Island plant fully protected – 100 -year flood – 1. 9 -foot sea level rise – Wave runup of 14 feet on east side and 2 feet on west side • On-site power plant ensures uninterrupted power supply • Nut Island headworks in Quincy similarly designed for sea level rise 94

A Rising Sea Impacts The Hydraulics Of The Outfall Tunnel • The effluent from the sewage treatment plant is discharged by gravity to the 9. 5 mile • To maintain hydraulic capacity, plant process tank elevation raised 1. 9 feet and tunnel diameter was up-sized from 24 feet to 24. 25 feet 95

21 Of MWRA Coastal Sewer Facilities Are Within 15 Feet Of Mean Sea Level 96

Envelope Flood Protection Measures Flood logs (exterior) Flood logs (interior) Watertight hatch Flood logs (interior) All flood logs to el 115. 6 97

Climate Change/Sea Level Rise • MWRA facilities on a 20 -year rehab schedule • Future contracts will include ‒ Flood protection ‒ Alternative energy ‒ Security upgrades 98

Age Of Wastewater Pipes 1 -25 Years, 26% 101 -135 Years, 30% 26 -50 Years, 13% 76 -100 Years, 11% 51 -75 Years, 20% 99

Age Of Water Pipes 1 -25 Years, 15% 26 -50 Years, 8% 101 -165 Years, 35% 51 -75 Years, 22% 76 -100 Years, 20% 100

Age Of Pipes 101

Transmission System Redundancy 102

City Tunnel Top Of Shaft 103

City Tunnel Redundancy 104

Mountain Of Debt 105

Deer Island Co-Digestion • DEP’s new organic waste ban presents an opportunity from co-digestion at Deer Island • Introduction of non-wastewater derived organic waste material into anaerobic digestion process can: – Increase digester gas for increased green energy production – Decrease purchase of electricity • Bench test showed positive results • Full-scale project pending resolution of logistical issues 106

Deer Island Combined Heat and Power Technology Change CHP Technology Change • • • Change from Bottom to Top cycle generation Improve efficiency Increased electrical production Better use of all digas - summer months Continue to meet plant heating needs CHP Benefit from Co-Digestion • • Expected 29 -42% increase in biogas Results in more electrical output Heat demand increase 5 -10% Electrical demand increase <2% 107