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Micron Technology has given Boise $2.5 million toward extending the city’s geothermal heating network to a planned affordable housing development with more than 300 units. The project is expected to break ground in spring 2027 and welcome residents in 2028; Boise says geothermal heat could cut utility bills by up to 80%.
Micron Technology has given Boise $2.5 million to help extend the city’s geothermal heating network to a planned affordable housing development with more than 300 units. The contribution fills a funding gap for the network expansion, which is part of a roughly $140 million housing project in the Lusk District.
The city’s geothermal system draws naturally heated water from underground and distributes it to buildings through a network of pipes. Boise says the water reaches the system at about 177 degrees Fahrenheit. The network currently serves about 100 buildings, including the Idaho State Capitol, and the city describes it as the largest municipal geothermal heating system in the United States.
The affordable housing project is being developed by the Housing Land Trust Program and J. Fisher Cos. Micron’s funding is intended to support the infrastructure needed to connect the development to the geothermal network. The city puts the overall project cost at about $140 million; the $2.5 million contribution is one part of that total, not the full cost of the housing project.
Boise estimates residents could save up to 80% on utility bills because the geothermal heat itself does not require fuel purchases. That figure is the city’s projected potential, not a reported outcome for residents: the homes have not been built, and no household savings have yet been measured.
Lower Energy Costs in Affordable Housing
Energy costs can add to the monthly burden of housing, so connecting an affordable development to a shared heating system could reduce one of residents’ recurring expenses. Boise’s projected savings of up to 80% make utility affordability a central promise of the project, though the actual amount will depend on how the system performs and how residents are billed.
The plan also gives the city a way to put its existing geothermal infrastructure to work for a new residential development. If the connection proceeds as planned, it would extend a system that now serves civic and other buildings to hundreds of affordable homes. The project’s progress may offer a practical example of how existing local energy networks can support housing, but its costs and results will need to be tracked after construction.
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Boise’s Existing Geothermal Network
Boise has operated its geothermal system for decades, using hot water beneath the city to heat buildings. Its current reach—about 100 buildings—provides the infrastructure and local experience behind the proposed expansion. The new housing connection builds on that network rather than creating a standalone system for the development.
The Micron contribution follows a $1 million Bloomberg Philanthropies Mayors Challenge award to Boise in February. The award was for upgrading the geothermal network for affordable housing and exploring possible additional uses. City communications senior manager Maria Ortega said early-stage technologies could potentially use the hot water system to provide cooling; that possibility is exploratory and is separate from the planned heating connection.
The development is planned for Boise’s Lusk District. Boise says it is expected to break ground in spring 2027, with residents expected in 2028. Those dates are projections, and the project remains in the planning and development phase.
“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 has not reported final terms for how the geothermal service will be billed to residents, or how the projected savings of up to 80% were calculated. The estimate should not be read as a guaranteed reduction for every household. The available information also does not break down the full $140 million project budget or specify how much of the geothermal expansion remains to be funded after Micron’s contribution.
The development’s planned construction and move-in dates are estimates, and no final schedule or occupancy details are provided. It is also unclear whether the city’s exploration of geothermal cooling will lead to a system at this site. The confirmed plan is to extend the network for heating.
Construction Targeted for 2027
The next major milestone is the development’s expected spring 2027 groundbreaking. Boise and its development partners will need to advance the housing project and the geothermal infrastructure work before the connection can serve residents. The city’s stated target is to have the homes ready for residents in 2028.
As the project moves forward, details to watch include the final construction schedule, the funding plan for remaining costs, and how the geothermal connection will affect residents’ utility bills. Any cooling application would require further development and should be treated as a separate possibility unless Boise announces a specific plan.
Key Questions
How many homes are planned for the Boise geothermal project?
The planned Lusk District affordable housing development has more than 300 units. The source does not give a more exact unit count.
How much is Micron contributing?
Micron Technology gave Boise $2.5 million to help expand the geothermal system for the development. The city estimates the overall project cost at about $140 million.
How much could residents save on utility bills?
Boise says the geothermal network could reduce utility bills by up to 80%. This is a city estimate, not a measured result or a guaranteed saving for each resident.
When are the homes expected to be built?
The development is expected to break ground in spring 2027 and be ready for residents in 2028. Those are planned dates, not confirmation that construction has begun.
Will the geothermal system also cool the homes?
The confirmed plan is to use the network for heating. Boise is exploring whether early-stage technology could use the system for cooling, but no cooling installation for this development has been announced.
Source: canarymedia.com
