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Micron Technology has applied for the first series of permits for a major expansion project at its Boise headquarters. The plan includes a dizzying array of new buildings and functions to support plans to bring semiconductor manufacturing back to the United States.
Overall, the plan will add over 6.5 million square feet of space to the site, roughly the size of the Pentagon.
To get there, Micron needs to get some permissions. First, the additional land owned must be annexed to the Boise city boundary. The land is located in what the city calls the Columbia Bench, south of Idaho 21 and roughly north of Interstate 84 in southeastern Boise. Micron also hopes the city will approve changing the zoning of a piece of land.
Scheduled content
fab
The Conditional Use Permit Application for Campus Expansion details a significant number of new buildings or expansions of existing buildings.
By far the biggest is the planned new “Fab”. It stands for manufacturing plant. The building he will have four stories and will contain 4.85 million square feet of space. At 160 feet tall, it’s nearly as tall as the Idaho Power Building downtown.
Although there are no reliable sources of record, this could be the largest building in Idaho. For example, Amazon’s fulfillment center in Nampa is 2.65 million square feet, about half that size. Amazon Nampa’s building occupies about 650,000 square feet on its first floor, while Micron Fab only has 1.2 million square feet on his ground floor.
“Because of the size, scale and complexity of the fab, we need many new employees and support facilities to function,” Micron facilities architect Paul Marcolina wrote in the application. “We plan to add offices, manufacturing, administration and utility facilities to support the fab.”
The building includes 600,000 square feet of cleanroom space. This is a controlled area with a low amount of airborne particles used in semiconductor development and manufacturing.
During a groundbreaking ceremony last month, Micron said the Boise cleanroom would be the largest in the United States. However, it later announced another expansion in New York, with 2.4 million square feet of cleanroom space.
support building
Administration Building
Fab is the star of the show, but the rest of the expansion adds significant new facilities to the already sprawling Boise campus.
The new administration building will run parallel to Federal Way and close to the fab. The plan calls for a large podium-style parking lot on the lower level that can accommodate 3,600 cars. For comparison, Capital City Development Corp. in Downtown Boise where he operates six public parking lots, but in total he has only 3,179 parking spaces.
Besides ample parking, the building also houses office space, as well as a wellness center and fitness center. Includes 440,000 square feet of space.
The building is separate from a project BoiseDev announced in August to build a new “world-class” office building elsewhere on campus.
Probe construction
Running parallel to the Administration Building and connected by a courtyard is a structure Micron calls the Probe Building. It is 365,000 square feet and will be connected to FB as well as another building nearby via a sky bridge.
“The upper floors of the probe building are primarily clean room space (approximately 85,000 square feet) where the final stage of the wafer manufacturing process, functional testing, is completed,” writes Marcolina.
On the lower floors of the Probe Building, Micron plans additional office space, a cafeteria, and other uses.
Building B51X
The current manufacturing building, which Micron calls B51, will add 92,000 square feet of space.
“We are expanding our existing TD wafer fabrication facility with automated materials handling that automatically transfers field-produced wafers to our probe facility for testing and ultimately to the FAB for microchip fabrication. We plan to include the system,” writes Marcolina.
An extension of this building will connect to the probe facility and eventually to the new fab itself.
central utility building
Just north of the fab, Micron will build a new central utility building. The 450,000-square-foot facility helps keep the plant running and includes support systems that the company says “power manufacturing and manufacturing processes such as boilers and chillers.”
Mask manufacturing building
The existing manufacturing facility for masks, or “reticles,” will also be expanded by an additional 30,000 square feet.
But wait. Other…
The project also includes several production support buildings, construction warehouses, vendor buildings, etc. It also contains some elements for utility support.
gas plant
A large new gas plant is being built and the City of Boise must approve a height exemption for high-rise new structures.
“Semiconductor manufacturing requires high-purity gases,” writes Marcolina. “The gas plant uses two gas columns and a cold room to separate gases such as oxygen and nitrogen from the ambient air used in the FAB. It should be about 185 feet.”
The pillar will be about the same height as the Wells Fargo building in downtown Boise.
The gas plant is located at the far eastern end of the campus expansion
water treatment facility
Micron says it will operate its own on-site water treatment plant.
“This state-of-the-art water treatment facility has multiple functions,” writes Marcolina. “It treats incoming water to meet high-purity specifications for use in manufacturing at the FAB and acts as a wastewater treatment facility.”
Marcolina’s letter states that it will use water from both the municipal water system operated by Veolia and an “on-site groundwater source.”
“Water conservation and reuse is a top priority, and Micron plans to treat and reuse the majority of our wastewater on-site,” he wrote. “Excess wastewater is fully treated before being discharged to the city’s treatment facility.”
electric yard
A 22-acre portion of the campus will be converted for use as an electric yard. According to Micron, the facility will serve as a substation and help support the fab’s power needs. The company said the equipment will be operated by Idaho Power.
what’s next
Micron’s expansion requires conditional use permit approval and annexation and rezoning. A date for the approval hearing has not yet been set.
Micron says the project will be built between now and 2030.
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