Louisville Metro Office of Planning

Regarding: Public Comment and Technical Exceptions to Draft Data Center Zoning Regulations

Case Number: 26-LDC-0014 (Land Development Code Amendments)

Subject: Strategic Regulatory Deficiencies and Necessary Framework Pivots for Proposed Data Center Siting Text Amendments

Bottom-Line-Up-Front Summary

The Louisville Urban League and coalition partners formally object to the current draft of the Data Center Zoning Amendments, deeming it legally vulnerable and structurally inadequate. To protect public health and financial stability, the city must shift to a rigorous, enforceable framework that prioritizes impact-based zoning and strict community safeguards.

Key Structural Deficiencies

• Arbitrary Sizing: Using square footage as the primary metric for “by-right” approval ignores critical environmental impacts, such as grid strain, water consumption, and low-frequency noise pollution.
• Regulatory Loopholes: Current “Accessory” and “Telecommunications” classifications allow developers to bypass environmental and zoning standards entirely.
• Advisory Language: The use of permissive language (“may,” “encouraged”) rather than strict mandates (“shall,” “required”) leaves residents unprotected regarding water cooling and infrastructure liabilities.
• Lack of Financial Assurance: The absence of mandatory decommissioning bonds places the long-term risk of facility abandonment and cleanup costs squarely on Louisville taxpayers.

Strategic Recommendations

• Adopt Intensity-Based Zoning: Eliminate size tiers and mandate a Conditional Use Permit (CUP) for all data center developments, regardless of square footage.
• Codify Expert Oversight: Require an applicant-funded, third-party expert review of all technical engineering plans (acoustics, thermal, electrical) to be made public before any planning hearing.
• Implement Strict Environmental Mandates: Establish a nighttime noise cap of 40 dBA, with an additional low-frequency cap of 55 dBC, and enforce minimum buffers of 1,500 feet from sensitive uses and 1,000–2,000 feet from exhaust stacks for sensitive uses.
• Require Financial Protections: Mandate that all applicants post an upfront performance bond or letter of credit covering full restoration costs to protect the city against facility obsolescence.
• Strengthen Legal Verbiage: Ensure all protective guidelines are codified as enforceable requirements rather than discretionary recommendations.

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To whom it may concern,

On behalf of the Louisville Urban League, local conservation partners, and concerned residents across Louisville Metro, we submit this comprehensive analysis and formal commentary regarding the draft text amendments released on June 9, 2026. While we acknowledge the Metro Council’s response to public outcry following the unmitigated approval of the Campground Road hyperscale facility, a thorough review of the draft reveals structural flaws, problematic regulatory loopholes, and significant omissions that threaten the long-term safety, financial stability, and public health of our community.

To ensure these regulations are both legally defensible and sufficiently protective, the Office of Planning must transition its current approach from a permissive, developer-friendly tiering system toward a rigid, enforceable structure. We evaluate the draft code using a strategic framework that highlights necessary adjustments to positioning, civic leverage, and legislative enforcement.

Size-Tiered Baseline

The draft ordinance incorrectly positions square footage as the primary metric for environmental impact, establishing a system in which facilities under 250,000 square feet can be built by-right with zero public notice, zero landowner notification, and no opportunity for a public hearing. This structural baseline is fundamentally flawed:

• Intensity-Based Impacts: A data center’s external impacts—such as localized grid strain, continuous water consumption, hazardous chemical storage, and low-frequency noise pollution—are determined by its operational intensity, not the square footage of its building envelope. A highly intensive, small-footprint facility can cause significantly more neighborhood disruption than a larger, passive warehouse.

• Elimination of Structural Loopholes: The draft creates separate classifications for “Data Center, Accessory” and “Telecommunications Data Center” that function as immediate bypasses for the broader code. Under current definitions, an accessory data center could serve an entire national or international corporate entity under the guise of supporting a minor on-site principal use, entirely escaping size limitations and environmental standards.

• Restructuring the Classification: We demand that Louisville Metro eliminate the arbitrary size tiers and accessory loopholes. The city must establish a unified “Industrial – Data Center” zoning classification and require a Conditional Use Permit (CUP) from the Planning Commission for all data center developments, regardless of size.

Civic Accountability

The current draft limits municipal power by forcing standard planning staff to review highly technical, energy-intensive infrastructure projects without specialized external tools or funding. To reclaim civic leverage and ensure balanced development, the following accountability mechanisms must be codified:

• Applicant-Funded Independent Expert Review: Evaluating complex acoustic models, thermal exhaust profiles, and electrical transmission calculations is beyond the standard scope of local planning boards. The ordinance must mandate that the Planning Commission retain an independent, third-party expert to review each application, with 100% of the cost covered by an applicant-funded escrow account. This review must be made public before any formal hearing.

• Upfront Compliance Documentation: The current draft fails to require comprehensive pre-construction documentation. Applicants must submit formal engineering plans during the application stage that demonstrate exactly how they will comply with noise, heat, water, and emissions standards, rather than offering unverified post-construction promises.

Enforceable Protections

For this ordinance to protect Metro residents for decades to come, the legal language must shift from advisory guidelines to strict, measurable mandates:

• Mandatory Legal Verbiage: Permissive words like “may” and “encouraged” appear throughout the draft text where strict terms like “shall” and “required” belong. For example, downgrading closed-loop water cooling from a requirement to an encouraged practice directly endangers our local water tables and shifts cost burdens onto local utility payers.

• Acoustic and Low-Frequency Noise Protections: A flat noise limit of 65 dBA at all hours is fundamentally inadequate. The code must implement a dual-standard framework that establishes a strict nighttime cap of 40 dBA, alongside explicit C-weighted (dBC) metrics, to regulate the low-frequency humming and vibration generated by continuous industrial cooling fans. Real-time, continuous monitoring and post-construction compliance testing must be required, preferably by the city or a neutral third party.

• Protective Boundary Setbacks: The proposed 25- to 200-foot setbacks fail to isolate residential spaces from industrial substations and ambient heat. Siting mandates must enforce a minimum 500-foot buffer from all perimeter property lines, 1,500 feet from sensitive uses (including homes, schools, daycares, nursing facilities, and places of worship), and a mandatory buffer of 1,000 to 2,000 feet from all active exhaust stacks.

• Grid Reliability and On-Site Generation: The current text restricts backup generator testing windows but remains entirely silent on behind-the-meter, primary electrical generation (such as continuous on-site gas turbines). The ordinance must explicitly prohibit continuous generator operation as a primary power source and require “Will Serve” letters from utilities demonstrating that data center operations will not affect the availability, reliability, or cost of service for everyday residential ratepayers.

• Mandatory Decommissioning Plans: The total absence of financial assurance mechanisms leaves Louisville taxpayers vulnerable to extreme cleanup and demolition costs if a facility is abandoned or becomes obsolete. The final ordinance must require all applicants to post an upfront performance bond or letter of credit tied to an engineer-prepared restoration cost estimate.

• Legal Vulnerability Warning: The current proposal to flatly prohibit data centers exceeding 500,000 square feet without clear, performance-based criteria is highly vulnerable to immediate legal challenges from land developers. A defensive, robust ordinance must regulate the intensity and measurable impacts of the land use rather than relying on arbitrary dimensional bans that invite litigation and unintended high-density clustering on adjacent tracts.

Louisville Metro has a historic opportunity to implement a forward-looking framework that welcomes technological investment without sacrificing public health, natural resources, or community transparency. We strongly urge the Office of Planning to integrate these technical recommendations and model ordinance standards before sending Case Number 26-LDC-0014 to the Metro Council for final adoption.

Respectfully submitted,

Lyndon E. Pryor

President & CEO

About the Louisville Urban League
The Louisville Urban League assists African Americans and those at the margins in attaining social and economic equality and stability through direct services and advocacy. For more information, go to lul.org or follow us on Facebook, Instagram, or Threads.

About the Juneteenth Jubilee Commission 
The Juneteenth Jubilee Commission, as part of the Louisville Metro Office of Equity, serves to facilitate the creation of an annual series of educational, cultural, and community-wide events for the purpose of increasing community awareness of the significance of Juneteenth. For more information, visit https://louisvilleky.gov/government/juneteenth-jubilee-commission