Finance - 2022-10-20 FY23 CIP Bond Reqs (with 22-1662, 22-1663, 22-1664, 22-1665) — File 22-1662

Various Capital Investment Plan Appropriation Requests City Council Finance Committee Mayor Katjana Ballantyne Richard E. Raiche, PE, PMP, MCPPO Director of Infrastructure & Asset Management 20 October 2022

Outline • Sewer Enterprise recurring CIP • Agenda item 20, ID # 22-1664 – Sewer system evaluation • Agenda item 18, ID # 22-1662 – Sewer system rehabilitation • Water Enterprise recurring CIP • Agenda item 19, ID # 22-1663 – Water main rehabilitation • Agenda item 21, ID # 22-1665 – Lead water service replacement 2

FY2023 Sewer Capital Investment Plan Bond Requests City Council Finance Committee Mayor Katjana Ballantyne Richard E. Raiche, PE, PMP, MCPPO Director of Infrastructure & Asset Management 20 October 2022

ID # 22-1664 – Requesting authorization to borrow $1,730,000 in a bond, and to appropriate the same amount for the annual recurring FY23 Sewer System Evaluation and Infiltration/Inflow Assessment. Annual SSES & I/I Program Agenda Item 20 4

FY19 / Greater DSQ condition assessment results • 6.8 miles inspected (4% of system) • 2.2 miles require heavy cleaning (33% of inspected) • 123 cubic yards debris estimated (approx. 10 truck loads) • 18 locations require dig-and-replace spot repairs • 7 locations require trenchless spot repairs • 0.8 miles require full trenchless structural rehabilitation (12% of inspected) • 1.1 miles require trenchless lining to eliminate I/I (16% of inspected) 5

FY20 / Ward 2 Condition assessment results • 24.7 miles inspected (14.5% of system) • 8 miles heavy cleaning (33% of inspected) • 280 tons of debris removed (24 truckloads) • 45 pipes require full-length dig replacement / 110 spot repairs • 4 miles require trenchless rehabilitation / 36 spot repairs (16% of inspected) • 5.3 miles could not access • Percentages similar to Greater DSQ area 6 • Note: Covid-19 skipped FY21 Request (completed FY20 work)

FY22 / Lower Broadway assessment results Ongoing Project Complete Through 9/30/22 │At Project’s Completion (Estimated) • 16.0 miles inspected (44% of project) │36.4 miles (21% of system) • 58 tons of debris removed│132 tons • 0.9 miles require full-length dig replacement (6% of inspected) │2.1 miles • 2.4 miles require trenchless rehab. & 28 spot repairs (15% of inspected) │5.5 miles & 64 spot repairs • 38,000 gal. per day of infiltration from 2300 observed defects │86,000 gpd / 5200 defects • Field observations and findings similar to Greater DSQ and Ward 2 7

May 2022 Water & Sewer CIP 8

ID # 22-1662 – Requesting authorization to borrow $4,390,000 in a bond, and to appropriate the same amount for the recurring FY23 Sewer Improvements program. Recurring project to repair sewer defects identified by SSES Agenda Item 18 9

FY22 Update • Ward 2 Sewer Rehab • 14 point-repairs completed; 3 point-repairs remaining. • 182 LF of 10-inch and 215 LF of 8-inch gravity sewer pipe replaced; 50 LF of gravity sewer replacement remaining. • 150 LF of water main relocated • 6,250 LF of cured-in-place sewer pipe lining; early November through January 2023 10

FY23 Intended Use • Winter Hill and East Somerville Sewer Rehabilitation • Target infiltration removal and highest severity structural defects 11 • Planned Scope of Work: • Trenchless Rehabilitation: 10,000 LF • Full-Length Dig Replacement: 3,000 LF • Design complete early 2023 • Bidding Spring 2023

May 2022 Water & Sewer CIP 12

FY2023 Water Capital Investment Plan Bond Requests City Council Finance Committee Mayor Katjana Ballantyne Richard E. Raiche, PE, PMP, MCPPO Director of Infrastructure & Asset Management 20 October 2022

ID # 22-1663 – Requesting authorization to borrow $7,110,000 in a bond, and to appropriate the same amount for the recurring FY23 Water Main Rehabilitation program. Annual Water System Improvement Program Agenda Item 19 14

FY21 Work completed • Holland and Broadway Water Main Rehabilitations • 1,653 LF cleaned and lined • 695 LF completed on Holland Street • 958 LF completed on Broadway • 64 water gate valves were replaced • 28 valves replaced on Holland Street water main • 36 valves replaced on Broadway • 3 Lead service replacements completed • Note: FY22 used for Spring Hill Sewer Separation area 15

FY2023 Intended Use • Central Broadway • High likelihood and consequence of failure based on 2020 risk-based plan. • Connects to primary source of water (MWRA) for this area of the City. • Remove debris accumulation (tuberculation) and install cementitious liner to protect existing pipe. • Planned Scope: • 2,800 LF of 14-inch water main, • 4,050 LF of 12-inch water main and • 450 LF of 10-inch water main. 16

FY2023 Intended Use • Central Broadway – Planned Limit of Work 17

March 2019 Water & Sewer CIP 18

ID # 22-1665 – Requesting authorization to borrow $1,477,738 in a bond, and to appropriate the same amount for participation in the FY23 MWRA Lead Line Replacement Program. Annual Water System Improvement Program Agenda Item 21 19

Lead water service replacement program • Entering third year of construction • 194 services replaced to date • 30 services confirmed non-lead containing • 100 service replacements planned for Phase 3 • Brochures mailed and information available at: • https://www.somervillema.gov/departments /programs/lead-service-line-replacement- program 20

March 2019 Water & Sewer CIP 21

Various Capital Investment Plan Appropriation Requests City Council Finance Committee Mayor Katjana Ballantyne Richard E. Raiche, PE, PMP, MCPPO Director of Infrastructure & Asset Management 20 October 2022