Sample records · City of Marietta, GA

Prime Storage Powers Ferry Place data center conversion

The conditions City of Marietta attached to this approval, each taken from the government document and cited to the page. These terms apply to this project; they are not general rules for the jurisdiction.

Decided byMarietta City Council (Mayor and Council)
DateAug. 12, 2026
Vote5-2 (Against: Richardson, Gaddis); heat-study amendment 6-1 (Gaddis against); Planning Commission recommended approval 4-3
ApprovalRezoning
ApplicantPrime Storage Powers Ferry Place Marietta, LLC (Prime Group Holdings)
Size18 MW (stated unspecified), 10.73 acres
Record statusVerified from the official record

Adopted conditions

ConditionValueSource
Noise
Noise may never exceed 56 dBA, including during emergencies.
Source text
"Noise maximums shall be limited at all times to 56 dBa and 77 dBc to match sound levels modeled in the referenced study."
56 dBAMarietta City Council minutes, Aug. 12, 2026, p. 8
Low-frequency noise is capped at 77 dBC at all times.
Source text
"limit the noise level maximums to 56 dBA and 77 dBc to match sound levels found within the August 2026 Sound Study report."
77 dBCMarietta City Council minutes, Aug. 12, 2026, p. 8
Monitoring is at the property line next to the apartments.
Source text
"Prime shall install and place into service continuous sound monitoring at the Property line abutting the residential use, recording sound levels."
Marietta Council Agenda Packet 3013, Aug. 12, 2026, p. 64
Noise must be monitored continuously and reported to the city, and any exceedance is a violation.
Source text
"Stipulation #13 shall require continuous, not annual, acoustical monitoring reported to City staff with any sounds exceeding stated limits incurring a violation."
Marietta City Council minutes, Aug. 12, 2026, p. 8
A pre-approval sound study was submitted and the limits were set to its modeled levels.
Source text
"Prime shall implement the sound mitigation measures identified in the Sound Study Report prepared by Bowman Consulting Group, Ltd., dated August 2026,"
Marietta Council Agenda Packet 3013, Aug. 12, 2026, p. 63
An independent sound study is required within three months of completion, with equipment upgrades until compliant.
Source text
"An independent acoustical sound study must be conducted within 3 months of completing the building and installing equipment."
Marietta City Council minutes, Aug. 12, 2026, p. 8
Setbacks and buffers
A solid sound barrier at least 10 feet tall replaces the chain-link fence along the residential side.
Source text
"replacement of the existing chain- link fence along the residential boundary with an acoustically rated barrier not less than ten (10) feet in height,"
10 ftMarietta Council Agenda Packet 3013, Aug. 12, 2026, p. 62
Size and height
The data center use is limited to less than half the floor area of the largest building on site.
Source text
"Stipulation #1 modified to limit the use to less than fifty percent (50%) of the floor area of the largest building on the site."
Marietta City Council minutes, Aug. 12, 2026, p. 7
Water
The cooling system may not use city water.
Source text
"shall utilize a closed-loop, air-cooled mechanical cooling system and shall not use municipal water for cooling."
Marietta Council Agenda Packet 3013, Aug. 12, 2026, p. 63
Leaks may not reach city sewers or stormwater, and all cooling wastewater must be disposed of off-site.
Source text
"All wastewater generated by the cooling system must be disposed of off-site at a properly permitted treatment facility."
Marietta City Council minutes, Aug. 12, 2026, p. 8
Cooling
Cooling is a closed-loop air-cooled system using only propylene glycol as an additive.
Source text
"Propylene glycol shall be the only additive used in the cooling system"
Marietta City Council minutes, Aug. 12, 2026, p. 8
Power and generators
Generators are emergency standby only, with sound enclosures and continuous emissions monitoring.
Source text
"Generators shall be equipped with sound mitigation measures as described in the Sound Study (August 2026) and will also be equipped with a continuous emissions monitoring system."
Marietta City Council minutes, Aug. 12, 2026, p. 8
Generator testing may not exceed 153 total hours a year (EPD synthetic minor threshold).
Source text
"Testing will be as described and will not exceed EPD thresholds (153 total hours annually) for classifying the site as a Synthetic Minor Resource."
153 hours/yrMarietta City Council minutes, Aug. 12, 2026, p. 8
Scheduled generator use is capped at 150 combined engine-hours a year, in daytime, one unit at a time.
Source text
"shall be limited to an aggregate of 150 combined engine-hours per calendar year across the emergency standby generators serving the Edge Inference Point."
150 hours/yrMarietta Council Agenda Packet 3013, Aug. 12, 2026, p. 62
Generators must run on renewable diesel.
Source text
"Prime shall operate the emergency standby generators on renewable diesel fuel - hydrotreated vegetable oil (H VO) or equivalent renewable diesel"
Marietta Council Agenda Packet 3013, Aug. 12, 2026, p. 64
Site conditions
The project must meet all Georgia EPD rules and permits.
Source text
"Must comply with all EPD regulations and permitting requirements."
Marietta City Council minutes, Aug. 12, 2026, p. 8
Exterior lights must be shielded and aimed down to limit glare.
Source text
"Exterior lighting associated with the Edge Inference Point shall utilize downward-facing, shielded fixtures"
Marietta Council Agenda Packet 3013, Aug. 12, 2026, p. 63
Extra landscaping and screening are required, especially facing the apartments.
Source text
"Prime shall provide supplemental landscaping and screening in connection with the Edge Inference Point,"
Marietta Council Agenda Packet 3013, Aug. 12, 2026, p. 64
Process and reporting
The approval is tied to this site and its exhibits.
Source text
"The use of this property shall be site specific and bound to Exhibits A. and C. attached."
Marietta City Council minutes, Aug. 12, 2026, p. 8
Equipment specs go to the city once chosen and a final report goes to council before the certificate of occupancy.
Source text
"Final report shall be sent to Council prior to issuance of the Certificate of Occupancy."
Marietta City Council minutes, Aug. 12, 2026, p. 8
Other
The applicant may not convert other storage or commercial sites in the city into data centers.
Source text
"No other storage facility sites or other commercial properties within the City limits, including 155 Heathersett Drive and 45 Whitlock Place, will be converted to data infrastructure facilities."
Marietta City Council minutes, Aug. 12, 2026, p. 8
An independent heat-dispersion model is required within three months, and heat rise beyond the sound wall is capped.
Source text
"An independent heat dispersion study (Computational Fluid Dynamics model) must be conducted within 3 months of the building being completed and equipment installed."
Marietta City Council minutes, Aug. 12, 2026, p. 8

What changed between proposal and vote

Every change documented between the proposed version and the adopted version, including terms that were loosened, dropped or left unchanged.

Scroll the table sideways to see every column.

TermProposedAdoptedChange
Noise limitCity code limits: 65 dBA day / 60 dBA night at residential property (letter stip. 4)56 dBA at all timesTightened
Low-frequency noise limit84 dBC day / 79 dBC night (letter stip. 4)77 dBC at all timesTightened
Noise monitoringContinuous recording with annual written report; facility-attributable sound basis (letter stip. 13)Continuous monitoring reported to staff; any exceedance a violationTightened
Floor area capLess than 50% of aggregate gross floor area of all buildings (letter stip. 1)Less than 50% of floor area of largest buildingTightened
Closed-loop coolingNo municipal water for cooling (letter stip. 6)Plus glycol-only additive, leak detection, shutoff, containment, off-site wastewater disposalAdded
Noise study after constructionNone in letterIndependent acoustical study within 3 months, upgrade until compliantAdded
An independent heat-dispersion model is required within three months,…None in letterCFD heat study within 3 months with rise capsAdded
The applicant may not convert other storage or commercial sites in…None in letterNo conversion of other city storage/commercial sitesAdded

Documents

Copies of the government documents cited above, hosted here so the links do not break. Large agenda packets are reduced to the cited pages; each page link opens the right page.

Instruments in this approval

  • Marietta City Council Meeting Minutes, August 12, 2026 (Z2026-12, Legistar 20260577, 15 stipulations) (adopted, Aug. 12, 2026)
  • Letter of agreeable stipulations, Parks F. Huff (Sams, Larkin & Huff) to Daniel Cummings, Aug 11, 2026 (incorporated as stipulation 1) (adopted, Aug. 11, 2026)
  • Development Services staff analysis Z2026-12 Powers Ferry Pl 1155 (07/17/2026) in Aug 12 agenda packet (approved unsigned, July 17, 2026)

What remains and what is missing

Final council zoning action (Z2026-12, CRC to CRC with additional data infrastructure use) with 15 stipulations. Remaining: Georgia EPD air permitting, post-construction acoustical and heat (CFD) studies within 3 months of completion, equipment specs to City, final report before certificate of occupancy.

No category is marked as missing a document for this record.