What's actually at stake.

The buffer between heavy industry and homes is essentially zero.

The proposed parcel is bordered on three sides by residential parcels, many of which are themselves on multi-acre lots with houses set back from the road. In a properly master-planned industrial site, M-1 land is typically separated from residential land by a step-down of zoning categories — light industrial, then commercial, then residential — sometimes with required vegetative buffers, fencing standards, and setback distances measured in hundreds of feet.

None of that exists here. There is no intervening zoning category between the proposed industrial use and the homes that border it. Residents should ask the City for the proposed setback, fence, screening, and lighting standards in any rezoning conditions — and whether those standards apply at the property line or only at building-edge.

The cooling equipment runs 24/7. The generators have to be tested.

Hyperscale data centers produce two distinct kinds of noise. The first is continuous: large air-handling fans, chillers, and transformer hum. Field measurements at operating data center campuses have placed property-line noise in the range of 60–85 dBA, depending on equipment, weather, and terrain.^N1 For reference, the U.S. EPA characterizes 60 dBA as comparable to normal conversation, 70 dBA as comparable to a vacuum cleaner, and 80 dBA as comparable to a garbage disposal — measured continuously.

The second is periodic: regulatory and customer requirements oblige operators to test the diesel backup generator fleet, typically monthly, and to run them during any grid disruption. Generator testing is markedly louder than ambient operation and has been the subject of repeated complaints in established data center clusters such as Loudoun County, Virginia, and Chandler, Arizona.

For nighttime sleep, the World Health Organization recommends external residential noise levels stay below approximately 40 dB; sustained nighttime noise above ~55 dB is associated with measurable health effects.^N2 Continuous fan and transformer noise from a hyperscale campus, even with mitigation, often falls between those thresholds at neighboring property lines.

Residents should ask: what is the proposed property-line noise standard, in dBA, and at what hours? Is there a written commitment to limit generator testing to specific daytime windows? What enforcement and complaint process applies?

Closed-loop is a starting point, not a guarantee.

The developer has indicated a closed-loop cooling design with an estimated daily water demand on the order of 15,000–20,000 gallons.^N3 Closed-loop is materially less water-intensive than evaporative designs, which can use hundreds of thousands of gallons of water per day per facility.^N4

Three concerns remain:

• Closed-loop is a design choice, not a regulatory requirement. Operators can convert to higher-water-use cooling for capacity, performance, or workload reasons. Without an enforceable, written condition in the rezoning, the cooling design can change after the vote.
• Cumulative regional demand matters. Even a low-water facility adds to regional demand at peak hot-weather periods, when water systems are most stressed.
• Source matters. The water source for the project — Gardner system, WaterOne, or wells — has different implications for system capacity and for the impact on adjacent well-water users.

Residents should ask: is the closed-loop design written into a development agreement with measurable performance standards? What is the water source, and what is the contracted volume? What is the maximum possible daily demand under the rezoning, including any future conversion?

Hundreds of MW of new load is rarely cost-neutral to existing ratepayers.

Hyperscale data centers typically require new dedicated substations and transmission upgrades to serve loads that can run from the low hundreds of megawatts into the gigawatt range at full buildout. Whether those grid-side investments are paid by the data center customer alone or socialized across the broader ratepayer base is determined by the tariff filed at the Kansas Corporation Commission (KCC).^N5

The structural concern: under many existing large-load tariffs, transmission and substation upgrade costs are partially socialized. That can mean residential and small-commercial customers across an entire utility's footprint help pay for capacity that serves a single industrial customer. Communities elsewhere have organized to push for stronger cost-causation tariffs that hold large customers responsible for the full cost of new infrastructure they trigger.

Residents and KCC interveners should track Evergy's tariff filings related to large-load customers and the specific substation/transmission upgrade plans for this project. The tariff terms — not the press release — determine who pays.

Industrial lighting in a previously rural sky.

Data center campuses run security and operational lighting throughout the night. From a rural neighborhood with currently dark skies, the change is significant: a lit-up industrial site visible from bedroom windows, on porches, and in yards across the seasons.

Light pollution has documented effects on sleep quality, on rural wildlife, and on the character of agricultural land use. Mitigation is possible — full-cutoff fixtures, motion-activated lighting, and warmer color temperatures all reduce spillover — but only if those design choices are written into rezoning conditions or into a development agreement.

Residents should ask for a lighting plan with full-cutoff fixtures, color temperature limits, and measurable lumen-spillover standards at the property line, especially on the residential-facing sides of the parcel.

Diesel backup generators emit measurable pollution — and they have to be tested.

Federal and state environmental rules permit the operation of diesel backup generators at facilities like data centers, subject to air permits issued by the Kansas Department of Health and Environment (KDHE). The generators must be tested regularly to meet reliability standards (and customer service-level requirements), and they run during any grid event.

Diesel exhaust includes fine particulate matter (PM2.5) and nitrogen oxides. PM2.5 is small enough to enter the bloodstream through the lungs and is associated with asthma exacerbations, reduced lung development in children, cardiovascular disease, and increased emergency-room visits.^N6 Children, the elderly, and people with existing cardiovascular or respiratory conditions face the highest risk.

Residents should request the proposed air permit, the number and capacity of generators, the testing schedule, and the cumulative emissions limits. These details should be public before the rezoning vote, not after.

Years of heavy traffic on roads not built for it.

Hyperscale campuses are typically built in phases over multiple years. During each phase, sustained heavy-truck traffic delivers earthwork material, structural steel, mechanical equipment, electrical equipment, and finish materials. Local two-lane county roads designed for agricultural traffic absorb that wear quickly.

Construction impacts also include dust, vibration, lighting for night work, and the noise of pile driving, concrete pours, and crane operations. If construction hours are not constrained in rezoning conditions, these impacts continue at all hours and on weekends.

Residents should ask for: defined construction hours, truck-routing requirements, road-impact bonds or fees to cover wear, and dust- and noise-control commitments enforceable by the City.

A facility at this scale raises the bar on local response capacity.

A hyperscale data center introduces hazards that are different in kind, not just scale, from typical commercial development. Among them:

• Large on-site diesel fuel storage for the generator fleet;
• Large battery energy storage systems (BESS), which present a fire risk that traditional water-based suppression cannot fully address;
• Specialty fire-suppression chemicals in equipment rooms;
• Continuous high-voltage electrical infrastructure;
• An on-site staff small enough that meaningful incident response in many scenarios depends on local fire and EMS.

Residents should ask Gardner Fire/EMS and Johnson County Med-Act for written input on whether existing capability — staffing, equipment, hazmat training, and mutual aid — is sufficient to respond to incidents at this kind of facility, and what additional investment, if any, would be needed and who pays for it.

Peer-reviewed research consistently shows a discount on residential property near large industrial neighbors.

Multiple peer-reviewed and federal-agency studies have looked at the relationship between residential property values and proximity to industrial facilities, transmission infrastructure, and large-scale energy projects. The exact magnitude varies by study and by facility type, but the direction is consistent: meaningful negative effect on nearby residential values, generally largest closest to the facility and diminishing with distance.^N7

This page does not assert a specific percentage decline for the Gardner site — that would require a local appraisal. The point is more general: the burden of proof should be on the developer and the City to show why this site would not follow the pattern documented elsewhere.

Residents should ask for an independent property-value impact analysis as part of the rezoning record. If one is not commissioned, it is reasonable to ask why.

What happens in 20 years if it goes obsolete?

Hyperscale facilities are designed for an operational life measured in decades, but their useful life is tied to power, cooling, and tenant business decisions that are difficult to predict 20 or 30 years out. Across the country, large industrial facilities have been built, run for a fraction of their planned life, and then sat partially idle or abandoned — leaving local government to deal with the cleanup, the property tax shortfall, or both.

One concrete tool is a decommissioning bond: a financial instrument set aside at the start of a project to fund its eventual safe shutdown, equipment removal, and site restoration. Decommissioning bonds are common in industries with a known end-of-life (e.g., wind, mining), and there is no good reason why hyperscale data centers should be exempt.

Residents should ask the City: is a decommissioning bond proposed as a condition of zoning? If not, why not? What happens if the facility is abandoned?

M-1 here makes the next M-1 next door easier to approve.

Zoning decisions are not isolated. A successful M-1 rezoning of a previously agricultural parcel, immediately adjacent to rural residential, becomes the planning context for the next request. The character of the area shifts. Adjacent landowners have a stronger argument for selling for industrial use, because "the area is already industrial." Subsequent rezoning requests are evaluated against a new baseline.

The same dynamic affects unincorporated Johnson County. Once Gardner has approved a hyperscale industrial use, similar requests in other unincorporated areas — and at the boundary of other Johnson County cities — face a less compelling case for denial.

None of this is hypothetical. It's the standard pattern of how industrial zones expand in metro areas.

Residents have asked for documents. Here's what we're still waiting on.

Adequate public review depends on adequate public information. Among the documents the community has reasonably asked the City and the developer to make publicly available:

• The full rezoning application and any exhibits;
• Any draft development agreement, with all incentive and tax-abatement terms;
• Evergy filings detailing power supply, substation work, and transmission upgrades;
• Kansas Corporation Commission tariff filings related to the project;
• KDHE air permit application and supporting analysis;
• Traffic and infrastructure impact studies;
• Water-supply contract terms and source identification.

This page will be updated with the status of each request as documents are published.