Thermal and Hydro Power Plant Maintenance Deer Island Treatment Plant
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1 Massachusetts Water Resources Authority Presentation to MWRA Board of Directors Thermal and Hydro Power Plant Maintenance Deer Island Treatment Plant March 12, 2014
2 On-Site Thermal/Power Plant Built in 1998 Provides Electrical Generation, Process and Facility Heat at Deer Island WWTP Two (2) High Pressure Steam Boilers fired on Digester Gas, No. 2 Fuel Oil or Combo Main Steam 590psig at 750deg F Two (2) Steam Turbine Generators: 18-megawatt Main STG 1.2-megawatt Back Pressure STG 3
3 Hydroelectric Power Plant Built in 2001 Provides Electrical Generation from Treated Wastewater prior to discharge into 9.5 Mile Effluent Outfall Tunnel Two (2) 1.1-Megawatt Kaplan Hydroelectric Turbine Generators Electrical Output varies based on Plant Flow and Tunnel Shaft Level (Ocean Tides and Tunnel Headloss) 4
4 Contract Summary O Connor Corporation - $3,273,607 Contract Duration: 730 days Scope: 1) Perform Scheduled Maintenance and Inspection Services at each Facility; 2) Provide Emergency and Non-Emergency Repair Services at each Facility; 3) Install Steam Bypass Line at Thermal/Power Plant; 4) Demo Abandoned Cooling Water Lines at Thermal/Power Plant; 5) Replace Various Pumps at Thermal/Power Plant 5
5 Two High Pressure Steam Boilers 6
6 18-Megawatt Steam Turbine Generator 7
7 1.2-Megawatt Back Pressure Steam Turbine Generator 8
8 Hydroelectric Turbine Generator 9
9
10 Massachusetts Water Resources Authority Presentation to MWRA Board of Directors Rehabilitation of Anaerobic Digesters, Primary Clarifiers and New Influent Gates at Clinton AWWTP March 12, 2014
11 Clinton AWWTP Overview Built in 1995 Advanced wastewater treatment services to the Town of Clinton and Lancaster Design capacity: Average: 2.5 MGD Peak: 12 MGD Rehabbed in
12 Facility Map Historical Pump Station, original Final Clarifiers (3) Sludge Holding Tank Anaerobic Digesters recently rehabbed Gravity Thickeners (2) Sludge Dewatering Building Primary Clarifiers recently rehabbed Aeration Tanks 80 Diameter Trickling Filters (2) 60 Diameter Trickling Filters (2) with new distribution arms 13
13 Contract Summary Contract #7277A Lowest Bidder: R. H. White Construction Co. - $4,347,571 Contract Duration days Scope: 1) Replace existing Primary Clarifier scum/sludge collection Equipment and concrete remediation; 2) Rehabilitation of two digester tank covers; 3) Replacement of various digested sludge pumps piping and valves; 4) Replacement of Digester mixing system; 5) Add isolation gates to protect the plant in the event of catastrophic flooding 14
14 Primary Clarifier Concrete Restoration 15
15 Primary Clarifier Walkway Concrete Restoration 16
16 Digester Sludge Transfer Pump 17
17 Digester Floating Cover (Steel) 18
18 Digester Fixed Concrete Cover 19
19 Primary Clarifiers 20
20
21 Massachusetts Water Resources Authority Presentation to Board of Directors Remote Headworks Upgrade Amendment 3 March 12, 2014
22 Remote Headworks Facilities Location Plan 23
23 Amendment 3 Summary New Scope Items Relocation of Odor Control Equipment Original layout on north side of facility New layout on south side of facility Additional Design Items Conversion to natural gas to reduce heating costs Individual electric actuators for sluice gates Connection to City of Chelsea water system Flood Protection Protect facility from 100-year storm plus 2.5 feet Integrated building solutions for exterior protection from floods Interior improvements to isolate facility from influent MA Contingency Plan Reporting Requirements Phase II Report and Risk Assessment Revised Activity and Use Limitation (AUL) 24
24 Odor Control Equipment Alignments 25
25 Views of Odor Control Equipment 26
26 Flood Protection Existing Exterior Elevation 119 Elevation
27 Flood Protection Barriers 28
28
29 Massachusetts Water Resources Authority 2014 Update on Local Pipeline Financial Assistance Program March 12, 2014
30 Unlined Water Mains Need to be Replaced Old unlined cast iron pipe needs to be replaced or cleaned and lined to prevent tuberculation (rust build up), loss of disinfectant residual and potential bacteria growth 31
31 Water Financial Assistance Program - Summary $30M Pilot Program in FY98-FY99 $222M Phase 1 Program FY01-FY13 $210M Phase 2 Program FY11-FY20 ($61M distributed) 100 percent interest-free loan repaid over 10 years All Loans Repaid to MWRA 38 Communities Have Participated 328 Projects Funded during Phases 1 and 2 32
32 Status of Regional Water System 33
33 Water Financial Assistance Program - Results $313 million invested in community water projects 270 miles water main replaced with new cement lined pipe 153 miles existing water main cleaned and lined 4,600 lead service connection replacements Additional system improvements include valves, hydrants, storage tanks, booster pump stations, and meter projects 34
34 Examples of Tuberculated Pipe 35
35 New Cement Lined Ductile Iron Pipe 36
36 Typical Replacement Project West Roxbury 37
37 Typical Cleaning and Lining Project - Norwood 38
38 Reading Water Quality Pipeline Issues Board Authorized Early Distribution to Reading January 2013 $4,012,000 Distributed August 2013 Replacement of 15,500 LF and Cleaning and Lining of 16,200 LF Design Complete, Construction bidding for Spring
39 Local Projects Coordinated with MWRA Projects Cost Savings Achieved through Economy of Scale Saugus - $450,000 for Design to Replace 6,000 LF Project Bid under MWRA Lynnfield Pipeline Contract Milton - $750,000 for Construction to Replace 9,200 LF Project Bid under MWRA Southern Spine Contract 40
40 Milton Pipe Bursting Project Pipe Bursting Construction Method Utilized to Avoid Wetland Impacts 41
41 Lead Service Replacement Projects Arlington 210 Everett 300 Malden 1200 Medford 150 Melrose 200 Norwood 110 Somerville
42 Canton Water Quality Issues at Local Water Storage Tanks $1.1 million demolition/replacement of 0.7 MG Tolman Street Standpipe $0.5 Million cleaning and rehabilitation of 0.6 MG Ponkapoag Standpipe $410,000 replacement of faulty hydrants and gate valves 43
43 Canton Ponkapoag Standpipe Rehabilitation 44
44
45 Massachusetts Water Resources Authority Update on Co-Digestion March 12, 2014
46 Bench Scale Set-up 47
47 Project Site Before Demolition 48
48 After Demolition With New Equipment Pads 49
49 Thickened Sludge Pump 50
50 Food Waste Truck 51
51
52 Massachusetts Water Resources Authority Presentation to MWRA Board of Directors Spot Pond Covered Storage Project Update March 12, 2014
53 Covered Storage Tank Overflow Pipe 54
54 Section 99 Isolation 55
55 Mobile Pumping Units Deployed 56
56 Overflow Pipe Jacking Pit 57
57 Overflow Pipe in Jacking Pit 58
58 Overflow Pipe in Jacking Pit 59
59 Muck Removal 60
60 Muck Removal 61
61 Clearing for Receiving Pit 62
62 Tracking of Pipe Jacking 63
63 Pump Station and Tank Wall 64
64 Pump Station and Tank Wall 65
65 Tank Wall 66
66 Concrete Pour 67
67 Rendering of Pump Station 68
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