# Mesquite Data Center Projects: Ordinance 5259 CUP, Generator, Noise and Cooling Rules URL: https://mycontractorsinsurancequote.com/projects/data-center-construction/mesquite Updated: 2026-10-29 · Reviewed by the Principal, Gleason Insurance Brokers, LLC Publisher: My Contractors Insurance Quote, a website of Gleason Insurance Brokers, LLC Mesquite's Ordinance No. 5259, adopted July 20, 2026, lets a data center locate only in the Industrial district or an industrial planned development with a conditional use permit from the City Council, and sets 300- and 500-foot setbacks, Tier 4 Final diesel generators with weekday test windows and closed-loop or recycled water cooling. It also requires a sound study within 60 days after the certificate of occupancy and immediate fixes if the site exceeds the noise limits, along with a decommissioning plan that carries no required bond or other security. The ordinance takes effect five days after publication, so confirm the effective date and current text with the City before relying on it. ## Key Decision Points - Ordinance No. 5259 was passed on July 20, 2026, and takes effect five days after publication; confirm the effective date with the City. - Data centers need a City Council conditional use permit and are allowed only in the I district and PD-Industrial. - Buildings sit at least 300 feet, and generators, cooling, batteries, transformers, substations and fuel tanks at least 500 feet, from residential, schools, child care, hospitals and assisted living. - Diesel generators must meet EPA Tier 4 Final standards and test only on weekdays from 9 a.m. to 4 p.m. - A sound study is due within 60 days of the certificate of occupancy, and exceedances must be fixed immediately. - A decommissioning plan is approved with the CUP, but Section 3.514 requires no bond, letter of credit or other security for it. ## A Conditional Use Permit in Industrial Districts Only Ordinance No. 5259, a zoning text amendment the City Council passed on July 20, 2026, adds Section 3.514 on data centers to the Mesquite Zoning Ordinance. The signed copy on the City's ordinance site carries an Exhibit A marked final on July 22, 2026. The ordinance says it takes effect five days after publication; the publication date is not shown on that copy, so confirm the effective date and any later amendments with the City. Under Section 3.514, "Data Centers shall be permitted as a principal use only upon approval of a Conditional Use Permit (CUP) by the City Council," and only in the I (Industrial) district and PD-Industrial. The CUP application must include a traffic and construction management plan, and the construction traffic plan must address haul routes and hours. Costs of the City's outside consultants "shall be borne by the applicant." A violation is a Class C misdemeanor, and the ordinance caption sets a fine not to exceed $2,000. For the general contractor, the CUP conditions become contract conditions. Haul routes, work hours and the site plan approved with the permit typically flow into the prime contract and every subcontract. For other agency requirements across the metro, see [Dallas-Fort Worth construction insurance and bond requirements](https://mycontractorsinsurancequote.com/texas/metros/dallas-fort-worth). ## Setbacks for Buildings and Equipment Yards Principal buildings must sit at least "three hundred (300) feet" from residential uses, schools, child care facilities, hospitals and assisted living. Generators, cooling equipment, battery energy storage, transformers, substations and fuel tanks must sit at least "five hundred (500) feet" from the same uses. The larger equipment setback shapes the site layout and often the length of duct banks, fuel lines and internal roads, so civil and electrical scope can grow on a constrained parcel. The approved site plan becomes the baseline for change orders, and the builders risk values and the subcontract scopes typically follow it. For how Mesquite's rules compare with other markets, see [data center construction requirements by state and city](https://mycontractorsinsurancequote.com/projects/data-center-construction). ### Illustrative scenario: A General Contractor Prices a Mesquite Data Center Trinity Crest Constructors is bidding a two-building data center on industrial land in Mesquite after the owner obtains a conditional use permit. Its estimate places the generator yard and fuel tanks 500 feet from a nearby school, carries Tier 4 Final units in Level 3 enclosures and schedules load bank tests on weekdays between 9 a.m. and 4 p.m., which adds weeks to commissioning. The builders risk carrier asks for the testing plan and the closed-loop cooling fill sequence, and the contract assigns the post-occupancy sound study to the owner, with the acoustic consultant's design and the mechanical subcontractor's warranty covering any fixes. These details are hypothetical, and a real program depends on the City's approvals, the surety or carriers and the firm's own risk. ## Tier 4 Final Generators and Weekday Test Windows Section 3.514 says "All diesel generators shall meet or exceed EPA Tier 4 Final emission standards." Generators need a Level 3 enclosure limiting sound to 70 dBA at 25 feet. Testing is limited to Monday through Friday, 9 a.m. to 4 p.m., for no more than four hours, with one full-load test per generator per quarter, and emergency runs must be reported to the Director within 72 hours. Those windows apply to commissioning as well as operations, so load bank and integrated systems testing can take longer than a schedule built around nights or weekends. Tier 4 Final units with aftertreatment and enclosures add equipment value, and fuel delivery and storage on site bring spill exposure during construction and startup. Fuel storage and generator work raise the exposures discussed in [contractors pollution liability insurance](https://mycontractorsinsurancequote.com/contractors-pollution-liability-insurance). ## Noise Limits and the Post-Occupancy Sound Study The ordinance sets property-line limits of 65 dBA by day and 60 dBA at night, with 55 dBA at night next to residential. Low-frequency limits are 55 dB at 16, 31.5 and 63 Hz. "Within sixty (60) days of issuance of a Certificate of Occupancy," the operator must submit a post-construction sound study. If the study shows the site exceeds the limits, the operator "shall immediately undertake all measures necessary to achieve compliance." That obligation lands after the certificate of occupancy, when the general contractor may have demobilized and the warranty clock has started. Who pays for barriers, silencers or equipment changes depends on the design responsibility, the acoustic specification and the warranty terms in the contracts. A noise retrofit is typically a contract and design question rather than an insurance claim, since liability policies generally respond to property damage or bodily injury rather than the cost of meeting a performance standard. Subcontractors who return for remediation work bring their own completed operations exposure. Liability for work after turnover is explained in [completed operations coverage](https://mycontractorsinsurancequote.com/project-specific-liability-insurance/completed-operations). ## Closed-Loop Cooling and Water Capacity Section 3.514 says "Only closed-loop or recycled water cooling systems are permitted." Potable water for open evaporative or once-through cooling is prohibited, and the applicant needs written confirmation of water capacity before final site plan approval. Closed-loop systems put more of the cooling plant's value in chillers, pumps and piping that are tested and filled on site, and leak or freeze damage during commissioning is the kind of loss builders risk underwriters ask about. The water capacity letter is also a precondition to final site plan approval, so a delay there can hold up the start of work. Testing, equipment and delay coverage for these builds is explained in [builders risk for industrial and data center projects](https://mycontractorsinsurancequote.com/builders-risk-insurance/industrial-and-data-center-projects). ## Decommissioning Without Required Security The City Council approves a decommissioning plan with the CUP. If a site is inactive for 36 months, decommissioning must start within 180 days and be substantially complete within 12 months. Section 3.514 does not require a bond, letter of credit or other financial security for that obligation. With no security in the ordinance, there is no decommissioning bond for a surety to write under this section. A CUP condition, a development agreement or a lender may still ask for one, so read each approval. Whether a surety will write any bond is subject to underwriting, and a bond is a surety obligation, not insurance. Surety underwriting and bond types are explained in [construction surety bonds](https://mycontractorsinsurancequote.com/construction-surety-bonds). ## State Rules and the Insurance Program A Mesquite campus also sits under statewide rules: SB 6 (2025) large-load interconnection standards, including backup generation able to serve at least 50 percent of on-site demand that the utility may call on in emergencies, and the Comptroller's data center sales tax exemption, which excludes property incorporated into real estate. The Governor's 2026 letters directing an audit and a pause on TCEQ data center permits are executive directives whose duration may change. The ordinance sets no insurance limit. Its effect on the program is through scope and timing: Tier 4 Final generators and fuel, closed-loop cooling plant and restricted test windows that can stretch commissioning, plus a post-occupancy noise obligation that tests the warranty and completed operations terms. Builders risk periods, testing terms and pollution coverage typically need to reflect those items. Terms can vary by carrier guidelines and programs, subject to underwriting and the terms of the bonds and policies issued. Statewide interconnection, incentive and directive details are covered in [Texas data center power, tax and permit requirements](https://mycontractorsinsurancequote.com/projects/data-center-construction/texas). ## Before You Ask for a Quote ### What to Gather - The CUP approval and its conditions - Site plan showing the 300- and 500-foot setbacks - Generator specifications, enclosure level and fuel storage design - Commissioning and test schedule within the weekday windows - Acoustic design basis and noise specification - Water capacity confirmation and cooling system design ### What to Ask the Insurer or Surety - When did Ordinance 5259 take effect, and has it been amended? - Who is responsible for the post-occupancy sound study and any fixes? - Do the test windows extend commissioning beyond the builders risk period? - Does any approval or lender require decommissioning security the ordinance does not? - How is generator fuel stored and handled during construction? - Which CUP conditions on haul routes and hours flow into subcontracts? ## Broker Notes **Quick Answer:** Mesquite Ordinance No. 5259, adopted July 20, 2026, requires a City Council CUP for data centers in industrial districts, 300- and 500-foot setbacks, Tier 4 Final generators tested on weekdays, closed-loop or recycled water cooling, a sound study within 60 days of the certificate of occupancy and a decommissioning plan without required security. **Common Mistake:** Treating the certificate of occupancy as the end of the noise question. The ordinance requires a sound study after occupancy and immediate fixes if the site exceeds the limits. **Broker Perspective:** Because the test windows and the noise study fall late in the job, it typically helps to settle the builders risk period, warranty terms and acoustic design responsibility before contracts are signed. **Coverage Impact:** The ordinance sets no insurance terms, but Tier 4 Final generators, fuel, closed-loop cooling and post-occupancy noise work typically shape builders risk, pollution and completed operations questions. ## Questions Buyers Ask ### Where can a data center locate in Mesquite? Under Ordinance No. 5259, only in the I (Industrial) district or PD-Industrial, and only with a conditional use permit approved by the City Council. ### What generator rules does Mesquite set for data centers? Diesel generators must meet EPA Tier 4 Final standards, sit in Level 3 enclosures and test only on weekdays from 9 a.m. to 4 p.m., for at most four hours, with one full-load test per generator per quarter. ### What happens if a Mesquite data center is too loud after it opens? A sound study is due within 60 days of the certificate of occupancy, and if the site exceeds the limits the operator must immediately take the measures needed to comply. Who pays depends on the contracts. ### Does Mesquite require a decommissioning bond for data centers? Section 3.514 requires a Council-approved decommissioning plan but no bond, letter of credit or other security. Check the CUP and any development agreement for added conditions. ### When did Mesquite's data center ordinance take effect? It was passed on July 20, 2026, and takes effect five days after publication. The publication date is not shown on the City's posted copy, so confirm it with the City. ## Official Sources 1. [Ordinance No. 5259, Data Centers (MZO Section 3.514)](https://apps.cityofmesquite.com/city_secweb/ordinances/5259.pdf), City of Mesquite. Adoption July 20, 2026; effective five days after publication; CUP and districts; setbacks; Tier 4 Final generators, enclosures and test windows; noise limits and post-CO sound study; closed-loop cooling and water capacity; traffic and construction plan; decommissioning plan; consultant costs; penalty Verified 2026-10-26. 2. [SB 6, 89th Legislature, enrolled bill text](https://capitol.texas.gov/tlodocs/89R/billtext/html/SB00006F.htm), Texas Legislature Online. Large-load interconnection standards and backup generation able to serve at least 50 percent of on-site demand Verified 2026-10-26. 3. [Data Center Sales Tax Exemption](https://comptroller.texas.gov/taxes/data-centers/), Texas Comptroller of Public Accounts. Exemption excludes property incorporated into real estate Verified 2026-10-26. 4. [Letter to TCEQ on data center permits (September 21, 2026)](https://gov.texas.gov/uploads/files/press/TCEQ_Data_Center.pdf), Office of the Texas Governor. Executive directive to halt data center permits until ERCOT completes its review Verified 2026-10-26. ## Related Decisions - [data center construction projects](https://mycontractorsinsurancequote.com/projects/data-center-construction) - [data center construction risk checklist](https://mycontractorsinsurancequote.com/resources/data-center-construction-risk-checklist) - [insurance and bonds for general contractors](https://mycontractorsinsurancequote.com/who-we-serve/general-contractors) - [industrial construction projects](https://mycontractorsinsurancequote.com/projects/industrial-construction) - [Texas construction insurance and bond requirements](https://mycontractorsinsurancequote.com/texas) --- Start a quote request: https://mycontractorsinsurancequote.com/get-a-quote · Call 844-978-7283 Contract and insurance reviews are a courtesy service that may be available at times, depending on our workload and on the size, timing and complexity of the project. 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