Bonner Data Center
Update 6/8/2026:
The Bonner Data Center project developer is continuing to finalize materials for presentation to the Missoula County Consolidated Land Use Board (MCCLUB). At this time, the public hearing schedule is to be determined, pending receipt of a complete application.
You can sign up to follow this project at the right-hand side on this page. When the new date is determined for the MCCLUB public hearing, project followers and commenters will receive an email.
This project will be reviewed by the Missoula County Consolidated Land Use Board (MCCLUB). This land use board holds their public hearing meetings on the first Wednesday of the month at 6 p.m. in the Sophie Moiese room of the Missoula County Courthouse. There may occasionally be a second meeting in the month, which will usually be the third Wednesday. There will be prior notice. These meetings are always open to the public.
The meeting agenda and related documents will be published on the Consolidated Land Use Board page.
Project overview
Missoula County is reviewing a proposed data center at 9314 Bonner Mill Road. The property is zoned industrial.
The proposal involves reusing a portion of the former mill building — commonly referred to as the planer building — for a high-performance computing (HPC) data center. This means most of the development would occur inside the existing structure, with no major expansion of the building footprint. Interior improvements would include constructing specialized rooms to house computer servers and supporting equipment.
The proposed data center would operate continuously, 24 hours a day, seven days per week, with minimal on-site staffing and relatively limited vehicle traffic associated primarily with maintenance and service visits.
The cooling system consists of a combination of adiabatic and evaporative cooling towers. The evaporative units would use water supplied from the site's existing fire suppression well rather than the domestic well system serving nearby residences. The applicant has indicated that no backup generators are proposed in the event of power outage.
The initial phase of the facility is expected to use approximately 7 megawatts (MW) of electrical power, with the potential to expand over time to utilize up to 29 MW, which is the estimated capacity currently available at the site.
Project summary
Current step: Special exception review
Application status: Third application submitted; Missoula County has requested more information.
Expected hearing: Postponed until further notice
- This project will be reviewed by the Missoula County Consolidated Land Use Board (MCCLUB). This land use board holds their public hearing meetings on the first Wednesday of the month at 6 p.m. in the Sophie Moiese room of the Missoula County Courthouse. There may occasionally be a second meeting in the month, which will usually be the third Wednesday. There will be prior notice. These meetings are always open to the public.
What is being reviewed in this project proposal?
The Special Exception review is required when the use, because of location, scale, required infrastructure or other potential impacts, requires a special degree of consideration and control to ensure such uses are consistent and compatible with the overall community character and whether potential impacts can be avoided or mitigated.
This page has been updated to reflect revised staff analysis of the scope of review. The Missoula County Consolidated Land Use Board (MCCLUB) must not approve a special exception unless and until they find the project application demonstrates all of the following:
The proposed use or development will be compatible with and will not substantially injure the value of adjoining property.
The proposed use preserves the character of the district, and the property is suitable for the proposed use (e.g. can meet the bulk and dimensional standards without requiring a variance).
The proposed use promotes the purpose and intent of the TIF Special District, where appropriate.
Substitute or additional design standards will preserve and protect the area’s architectural and aesthetic qualities.
In reviewing a Special Exception application MCCLUB shall give due consideration to the following:
a) Access, traffic, parking demand, non-motorized transportation and onsite vehicle circulation
b) Dedication and development of streets, rights of way, and public use areas, such as adjoining sidewalks
c) Impacts on or of public and private utilities or services
d) Proposed siting of any new structures necessary to accommodate the use and their relationship to adjoining and surrounding properties
e) Recreation opportunities and open lands available to serve the use
f) Natural resource protections
g) Landscaping and screening requirements
h) Signage and street lighting
i) Noise, vibration, outdoor lighting and other on and offsite impacts from the use
j) Frequency of use and hours of operation
k) Area of land necessary and adequacy of the site to accommodate the use and meet the intent of the district and character of the neighborhood
l) How the proposed use addresses the purpose of the TIF Special District intended to attract, retain, grow and develop secondary value-adding industries
m) Any other unique or relevant circumstances related to the property.
The burden to demonstrate compliance with these criteria falls to the applicant, not the County or MCCLUB.
Reasonable and appropriate conditions may be required to ensure that any potentially injurious effect of the Special Exception on adjoining properties, the character of the neighborhood, the purpose and intent of the TIF Special District, or the health, safety and general welfare of the community will be minimized. Conditions much be based on the criteria for review.
Zoning compliance permit
If a special exception is approved, the developers must apply for a zoning compliance permit. The permit application must demonstrate compliance with the County's data center zoning regulations, including requirements for new renewable energy and e-waste recycling. Zoning compliance permits are subject to administrative review and do not go through public hearing process.
Project review timeline
March 2026: Initial Contact
- Krambu and Missoula County Planning first discussed the proposed data center project.
March 25, 2026: First Special Exception Application - deemed incomplete
- The applicant submitted the first Special Exception application. County staff determined that more information was needed before public review could begin.
April 28, 2026: Second Special Exception Application - deemed incomplete
- The applicant submitted additional materials. County staff continued reviewing the application and identified remaining information needed for completeness.
May 11, 2026: Third Special Exception Application - deemed incomplete
- The applicant submitted a special exception application. Applicant has notified the county that a new application packet will be made available.
Date to be determined based on application completeness: Public Notice Period
- The County will mail notices to property owners within 500 feet, publish a legal notice, and post notices near the property.
Date to be determined based on application completeness: Consolidated Land Use Board Hearing
- The Consolidated Land Use Board is expected to consider the Special Exception request.
Date to be determined based on application completeness: Possible Permit Review
- If approved, Krambu may then apply for a Zoning Compliance Permit and other required permits.
How can I participate?
Community members are encouraged to stay informed and provide public comment. Comments are most helpful when they address the topics the Land Use Board may consider during Special Exception review, especially potential impacts to nearby residential properties.
Follow this project page if you want be emailed when there are updates with this project.
This project meets Missoula County Zoning guidelines and is an approved use for this property. The property owners need to lease this property. It is a major portion of the property and its occupancy impacts the Mill sites overall viability. Manufacturers are not seeking this Bonner location. We have low wages, high housing costs and huge transportation costs. Ther may not be any other uses for the site except for a data center. The Mill Manager reached out to numerous manufacturers without receiving any interest. This data center will pay an enormous amount of property and business equipment tax. The Bonner School and the Rural Fire Department should be in support of this opportunity. They use minimal water, it's a closed loop system. The noise level is below Missoula County standards. The construction jobs and the data center jobs will be above manufacturing job levels. I support this project.
Please do not go forward with a proposal or contract for this project. Even if a project like this moved forward, it would take years to fully understand the environmental, energy, and community impacts of something like this - and there is already talk of this opening in June. And once its here, its here to stay, as you can read from many other communities that had data centers built in them. They often need more water and energy than initially planned or promised. The company is unclear who their client would be for the data center, and without even knowing a client, how would they be making the promises they are already making on their impact to the community? What's more, with guaranteed impacts on the community and environment, I can't imagine the company has made any guarantees about generating local jobs or giving back to the community. I understand we are in the age of rapidly developing technology with astronomically growing needs, but this site is right next to the Blackfoot, a school, and many houses. I imagine the same promises this company is making now are the same made about the Smurfit-Stone site - and yes, this mill at least provided about 400-500 jobs to the community, but now this sits as an eyesore in our valley, an almost Superfund site, and no end in sight to who will clean it up or when. Bonner would be an awful place for a similar story. https://missoulacountyvoice.com/smurfit-stone-mill-site-cleanup/news_feed/the-smurfit-stone-story
As a Missoula resident I strongly oppose this plan. Building a data center like this has no benefit for our community. This project would pose numerous environmental and health problems for or community and give us nothing. The amount of power required would certainly affect our power supply. The radiation from this large of a center would cause long term health problems for those living nearby. No one benefits from this except the company. Please do not let them take advantage of our community for their own profit.
**Absolutely not.** We have nothing to gain from this and so very much to lose. Other comments here say plenty about that, so I’ll leave it there.
One thing though: on NPR today, the person proposing this data center said that its water requirements would not affect the Blackfoot River because water would come from the ground instead. Except…it’s all connected, from ground water to the river to broader impacts (as is everything). For example, see: https://pubs.usgs.gov/publication/fs20133001
Again, all costs, no benefit. NO to this awful idea!
I strongly oppose the data center. Data Centers like these pose environmental hazards and health risks to our community. This project will cause noise pollution to our Bonner and East Missoula community members and potentially cause long term health effects. The location of this near the Blackfoot river is a huge concern for recreation and one of our city's most valuable assets. Don't even get me started on the potential health impacts for Missoulians living downstream from this. Datacenters are power-hungry and will strain our grid, driving up costs for Missoula county residents. The supposed economic benefits this project will bring will be negligible because AI datacenters simply do not create a significant number of new job opportunities, and any benefits are heavily outweighed by the negative impacts. Don't let this AI company profit at our expense!
MIT did a study proving that artificial intelligence lowers cognitive ability and memory in users. AI has no benefit for our society, and Montana doesn't need that. I spent my entire life in Montana and just recently left for college to study environmental science so I can fight issues just like this. This won't give Missoula more money. Though this data center is supposed to use a "new source of renewable energy", we don't know what that is. For jobs? This will MAYBE provide ten jobs. The thing about artificial intelligence is that it can do all of our jobs. Society doesn't need more artificial intelligence! It's been shown useful in radiology, and only radiology. Generative AI, which is what this database would be used for, provides no benefits that outweigh the cost of mining what's necessary for the computers, the energy required to function, and the water it tends to use to cool down the huge computers. This would ruin views and our recreation around the area of Missoula. The datacenter will generate a constant noise, and people won't be able to enjoy the silence that nature provides.
Don't let this happen.
As a community member close to Bonner, I strongly oppose this AI data center.
The negative impacts to the community far outweigh a data center's possible positive effects. Noise pollution, light pollution and specific land management planning are just some of Krambu’s are clearly missing considerations in their application.
Please decline this contract moving forward as it will damage the Bonner and surrounding communities.
As a community member who lives within a stones throw of the proposed site, I strongly oppose this AI data center.
Negative impacts to the community remain innumerable and unclear, but obvious in their existence. Krambu’s lack of respect for our land, water, and community was clear at the Friends of 2 Rivers meeting.
The people will continue fighting this, so I hope that Mike Heisey will see what is right and decline to move forward with this contract.
I believe the community could come together and support a creative solution to put something in this space that would be beneficial to us all, if the opportunity was given.
This Data center is a bad idea. It does not serve the community. It will use gobs of water destroying the environment, gobs of electricity competing with local residents and creating more pollution. It will employ very few people. It will be noisy for local residents. Training 1 AI model creates as much carbon pollution as 5 lifetimes of a car. One of the creators of this says they won’t expand to full capacity? BS! When has an investor or anyone evolved in this kind of venture stopped short of taking it as far as they can. Do not let this happen!
Absolutely not. Do
Not not let this in!! We are losing our water table every year. This will destroy the river and Bonner. This area is too special to sell is u
It and us out!!
Have we learned nothing from the Berkeley Pit??? Montana is already rife with superfund sites and environmental disasters. And for what? So the rich can get richer while everyone else suffers? This will NOT benefit our community, it will only destroy it. It is unbelievable that this is even being considered!
100% oppose this proposal. The location for one is in a residential area which would not be okay for those who live there. The low grade constant hum would drive anyone crazy. The possible environmental/wildlife effects that could come from the “coolants” is unknown and probably not positive. This does not benefit the community in any way. If this is approved, this just opens the doors for more money hungry companies to come and take all of our resources this great state has to offer. It’s a dangerous line to walk and I really hope Missoula County has some common sense.
AI data centers lower the water table and discharge heavy metals in their wastewater. Many citizens around the country have found that they can't even use their groundwater after datacenters were built nearby as they lower the water table and then leech heavy metals from the cooling towers before discharging that wastewater back into the ground. That wastewater WILL make its way into Bonner resident's wells, as well as the Blackfoot river - one of the lower 48's MOST PRISTINE waterways. Missoula has almost no industry besides tourism, and now this data center wants to put one of the main attractions of our region in danger just to make a buck by hoarding data.
It is entirely possible to create a truly CLOSED loop cooling system using glycol chillers and heat exchangers instead of water cooling towers and fans. Have this company put up the money to install solar and glycol to alleviate the unnessecary draw that will ultimately negatively affect our region and the generations to follow.
I oppose this proposal in its current form, and I think the community deserves far more information before any approval is considered. Sounds like something that will benefit very few and affect very many.
Too much is still unknown. Krambu has no confirmed client, no confirmed power source, and the size of the facility depends entirely on who that client turns out to be. Most critically, their water-cooling system has never been deployed at scale. Do we want Bonner to be the testing site for this?
The job creation argument doesn't hold up to scrutiny. Krambu's own figures are that roughly three employees per 2 megawatts, which is only a handful of permanent positions for a facility with a stated vision of 100 megawatts. Would these be local employees or people who already work for Krambu?
With Krambu based in Idaho, and so few employees, it seems logical that any revenue generated will not actually stay in this community.
The power consumption concern is real. The Hyperblock cryptocurrency operation consumed a third of Missoula's daily power before going bankrupt and leaving. We should be skeptical of assurances that this will be categorically different.
And residents living across the street from this facility deserve honest answers about noise and health. Not guesses. A proven track-record. Communities near operating data centers frequently report health concerns tied to persistent background noise and vibration including infrasound. These are not hypothetical fears.
Communities that have made that same calculation with data centers have frequently ended up with the burdens and not the benefits.
A truly beneficial tenant would come in with specifics, a track record, and a community benefits agreement. Krambu has none of those things yet.
I urge the Land Use Board to require complete, specific answers to these questions before this project moves any further forward.
I vehemently oppose the data center project. There are countless examples of similar projects in other communities creating environmental hazards and inflating costs for residents while contributing nothing in return. Data centers have been shown to create hazardous noise pollution which will at best create a nuisance for nearby residents and students, and at worst pose unknown health risks. The proposed location is near the Blackfoot River, which is one of our greatest and most fragile community assets. A datacenter in this location poses risks to wildlife and the enjoyment of recreationists. Finally, datacenters are power-hungry and will strain our grid, driving up costs for Missoula county residents. The supposed economic benefits this project will bring will be negligible because AI datacenters simply do not create a significant number of new job opportunities. Don't let this AI company profit at our expense!
AI data centers provide no benefit to the community. Just say no.
I strongly oppose the approval of this data center project. It is a strain on resources and does not bring in any significant benefits to the local community. The long term effects of these centers on natural resources, wildlife, and public health are under researched and potentially pose significant harm. The potential and known risks wildly outweigh any posed benefit. Keep data centers out of Bonner.
I find it pretty incredulous that this company is taking QA's and wants public buy in when they can't even offer specifics. Is Krambu/this AI company aware that they will need to acquire water rights to use any water from a nearby source? How do we know they have done their full due diligence to understand the true feasibility of this center? I seriously doubt it and frankly it seems like they know it is not feasible in these ways and don't want to confirm. Until they can provide quantitative calculations for prospective water use and other factors, there is simply no way to support this.
The existing tenant gave notice they are moving out. The mill manager said that he has contacted numerous companies and industries looking for a replacement manufacturer. The wood products industry is dead. Our local timber is not suitable for dimensional lumber. The paper industry is way down and not seeking chips (beetle kill). Manufacturers want to locate in areas of much higher population, in areas that are close to customers transportation costs are significant. Montana is not close to anywhere. Wages in Montana are not enough to meet the local housing costs and the cost of living. This current date center interest is the only interest in this 240,000 sq. ft. space. Jeannie Dixon said that this use fits the zoning. The Tenant prospect answered the questions about water usage and stated that they use a closed loop system. In addition, the mill does not have a discharge permit. No wastewater would be discharged into the Blackfoot. E waste will be disposed of subject to Missoula County regulation. The electricity used will be replaced per code as well. The tenant will be hiring many local businesses and citizens to construct the data center. New skilled long-term jobs will be created as well. The cost to build a data center is significant and will be subject to property tax and business equipment tax to the benefit of Missoula County. A vacant building does not offer any benefit and would negatively impact the mill site and the other tenants there. This is an opportunity that should be positively considered.
The existing Tenant gave notice, they are moving out. The mill manager stated that he reached put to many industries, but has not received any interest in this space except for this data center. The problem for manufacturing is that , we do not have high enough wage levels to meet the cost of housing and the cost of living. A vacant 240,000 sq ft does not do the community any good. That space has to be leased in order for the mill site to be viable. The data center company answered questions about water (a closed loop system, no discharge), noise (below Missoula County standards), e waste, etc. The county said that the property is zoned for a data center. They will replace the energy they use. Missoula county stands to recieve a substantial amount in property tax and business equpment tax, which will help the community. I think we should support this business.