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Micron Technology pledged $2.5 million to help extend Boise’s geothermal heating network to a planned affordable housing development with more than 300 units. The city says geothermal service could reduce residents’ utility bills by up to 80%; construction is expected to start in spring 2027, with residents expected in 2028.
Micron Technology has pledged $2.5 million to help extend Boise’s geothermal heating network to a planned affordable housing development with more than 300 units, filling a funding gap for the project. The city says the network could cut future residents’ utility bills by up to 80%, though that is a projected saving rather than a guaranteed outcome.
The housing project is planned for Boise’s Lusk District and is being developed through a partnership between the city’s Housing Land Trust Program and J. Fisher Cos. The overall project is estimated to cost about $140 million, according to the city. Micron’s contribution supports the geothermal-system extension, rather than covering the full housing development.
Boise expects the development to break ground in spring 2027 and be ready for residents in 2028. The city’s existing system carries naturally heated water from underground to about 100 buildings. The water reaches the network at about 177 degrees Fahrenheit, and the service already heats buildings including the Idaho State Capitol.
Micron is headquartered in Boise. April Arnzen, the company’s executive vice president and chief people officer and president of the Micron Foundation, said in a statement that the company’s investment was intended to support people in its home community. Mayor Lauren McLean said the contribution brings the city closer to providing geothermal heat to hundreds of affordable homes.
Lower Bills for Planned Homes
The extension would connect a city-operated renewable heating system to a new affordable housing development, bringing the network’s benefits to residents who may otherwise face significant energy costs. The city estimates the geothermal service could lower utility bills by up to 80%. Actual savings will depend on household energy use and the final service arrangements; the supplied information does not give a guaranteed bill reduction for individual residents.
The plan also shows how local infrastructure funding and private philanthropy can support housing projects beyond construction costs. Micron’s $2.5 million contribution addresses a funding gap for the geothermal extension, while the city and its housing partner pursue a development estimated at about $140 million. The heating project’s impact will depend on the homes being built as planned and on the network connection being completed.
For Boise, the proposal builds on an existing system rather than introducing geothermal heating from scratch. Extending service to more than 300 homes would add affordable housing to the roughly 100 buildings already connected, while expanding the use of the city’s underground heat resource.
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Boise’s Existing Geothermal Network
Boise has operated its geothermal heating system for decades and describes it as the largest geothermal heating system in the United States. It distributes naturally warmed water to public and private buildings. The new housing connection would extend an established municipal network into a planned residential development.
Earlier this year, Boise received $1 million from the Bloomberg Philanthropies Mayors Challenge to upgrade the network for affordable housing and examine possible additional uses. One idea under exploration is whether the hot water could support cooling through early-stage technologies. City communications senior manager Maria Ortega said those technologies could potentially use the system’s hot water for cooling; the source material does not say that cooling is part of the current housing project.
Other U.S. communities are also developing geothermal networks, including projects in Denver, Enfield, North Carolina, and Framingham, Massachusetts. Those initiatives differ in their design and stage of development. Boise’s current announcement is specifically about extending its existing network to serve the Lusk District housing project.
““Boise has been Micron’s headquarters for 48 years, and investing in this community means investing in the people who call it home.””
— April Arnzen, Micron executive vice president and chief people officer and president of the Micron Foundation
Costs, Savings and Project Delivery
The city’s estimate of up to 80% in utility-bill savings does not specify a typical household’s expected reduction, how the comparison is calculated, or which utility costs would be included. It is not clear whether residents will receive a particular rate or how geothermal charges would appear on their bills.
The development is planned, with groundbreaking expected in spring 2027 and occupancy anticipated in 2028; neither milestone has occurred. The source material does not provide a construction schedule beyond those projections, identify the remaining funding sources for the full project, or describe the final design and capacity of the geothermal connection. The city’s exploration of geothermal cooling is also preliminary and separate from the heating proposal.
From Funding to Construction
The next major milestone is the planned spring 2027 groundbreaking for the Lusk District development. Before then, the city and J. Fisher Cos. will need to advance the housing project and the work to connect it to Boise’s geothermal network. The source material does not give dates for design approvals, construction of the extension, or further funding announcements.
If the schedule holds, the homes are expected to be ready for residents in 2028. More details on utility rates, projected household savings and the geothermal system’s final configuration would help clarify how the connection will affect residents in practice.
Key Questions
What did Micron fund?
Micron pledged $2.5 million toward extending Boise’s geothermal heating network to a planned affordable housing development. The contribution helps fill a funding gap; it is not the full cost of the development.
How many homes are planned?
The Lusk District development is planned to include more than 300 units. Boise’s Housing Land Trust Program is working with J. Fisher Cos. on the project.
How much could residents save on utility bills?
The city says geothermal service could reduce utility bills by up to 80%. That is a projected maximum, not a guaranteed saving. Details about the calculation and future resident rates have not been provided.
When could construction start and residents move in?
The project is expected to break ground in spring 2027 and be ready for residents in 2028. Those are planned dates, and the schedule could change.
Will the homes also use geothermal cooling?
Cooling is not confirmed as part of the housing project. Boise is exploring whether early-stage technologies could use hot water from its network to provide cooling, but that work is described as a separate possibility.
Source: canarymedia.com
