Concord committee maps path for network geothermal pilot, eyes $50,000 planning grant

Speaker 1, a member of the Town of Concord Climate Advisory Committee subcommittee, opened the meeting by proposing a short, focused effort to explore whether network geothermal could work in Concord and what a pilot would require.

The group agreed its immediate goal is a concise, six-month deliverable that lays out what makes a good network-geothermal site, the business and technical questions that must be answered, and a path to a pilot. Speaker 1 said the subcommittee should "learn how to do the business modeling" and produce a report that town leaders and CMLP can act on.

Why it matters: network (district) geothermal systems can provide highly efficient heating and cooling by sharing ground-source capacity across multiple buildings; proponents at the meeting argued the approach could help Concord meet electrification and climate goals if costs and customer recruitment can be solved. Several members stressed that Concord’s status as an MLP community makes the town a potentially useful pilot case for other municipal light plants.

Key details and next steps: the committee discussed candidate site types (large multifamily buildings, critical facilities, or neighborhoods along gas dead-ends) and technical distinctions, such as open-loop versus closed-loop designs. Speaker 4 noted differences between a central geothermal system (like the First Parish project, which uses open-loop wells serving several buildings) and a networked loop that multiple property owners can tap into. The group emphasized practical scoring criteria—number of homes the loop would pass, percentage of nearby buildings currently using gas, existing utility upgrade schedules—and proposed a GIS mapping exercise to correlate assessor fuel-type data to parcels.

Utility and funding context: members said utility partners could be critical. Speaker 3 described regulatory pressure and incentives, noting that the Department of Public Utilities and utility programs have created reasons for National Grid and Eversource to identify clusters where downscaling gas infrastructure and funding electrification measures make sense. The subcommittee identified several funding pathways to support planning: HEAT/Mass Clean Energy Center programs, municipal technical assistance through DOER, and a Department of Energy/DOER planning grant opportunity of approximately $50,000 for towns under 35,000 residents that has an Aug. 18 application deadline.

Consultant role and deliverables: the group agreed that a consultant would help with business and technical modeling, site scoring, and community engagement; members discussed preparing an RFP and using grant funds to pay for consulting and initial GIS/mapping work. Deliverables discussed were a six-month memorandum identifying ideal site characteristics and a 12-month product that could support a pilot RFP and initial outreach.

Operational decisions: the subcommittee agreed to work openly, post agendas at least 48 hours ahead, use a rotating facilitator if no single chair volunteers, and appoint a clerk to post agendas and minutes. Speaker 1 volunteered to draft a short grant proposal for circulation over the weekend; members committed to review and to reach out to utility contacts and pilot projects (Framingham, Lowell) for lessons learned.

What was not decided: no formal vote was taken and no specific pilot site was selected. Members recognized limits to staff capacity for time‑intensive building audits and that some grant programs favor building-specific projects rather than higher-level planning studies.

Next steps: the subcommittee aims to submit a planning grant application, scope a consultant-led RFP for modeling and outreach if funded, begin GIS mapping of fuel types, and return with an updated work plan. The group tentatively set its next meeting for Sept. 11.

Quotes used in this article come from the meeting transcript and are attributed to speakers by the labels used in the transcript (Speaker 1–Speaker 5) because speakers were not introduced by full name in the record.