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Posted on: April 3, 2023

Concrete Batch Plants

Status Update Regarding Concrete-related Operations in McKinney

March 30, 2023


Lhoist, a lime slurry plant located at 1955 S. McDonald St., has ceased operations. While their operation has ceased and the equipment has been removed from the property, they still own the property and are responsible for ongoing maintenance.

Martin Marietta

Martin Marietta, a concrete batch plant located at 2005 S. McDonald St., is still operational. The city recently settled litigation that had been ongoing for several years. As part of the settlement agreement, Martin Marietta will be able to continue operating on the property until February 6, 2030, but will be unable to accept material deliveries before 6 a.m., shall only operate between the hours of 5 a.m. to 10 p.m. (March through October) and 6 a.m. to 10 p.m. (November through February), may install new equipment on site within 90 days of February 7, 2023, new lighting shall meet current city standards and existing lighting shall be deflected, electric blowers shall be utilized to unload cement instead of tractor motors, concrete mixing trucks shall operate at a maximum of 1,100 rpms, mufflers or noise suppressors shall be installed on all dust collectors, screening shall be provided along the McDonald St. frontage, and canopy trees shall be provided along the McDonald St. frontage. Representatives from Martin Marietta have indicated that they do not plan to open a new concrete batch plant on property they recently purchased in McKinney’s extraterritorial jurisdiction (located southeast of McKinney National Airport).

Cowtown Redi-Mix

Cowtown Redi-Mix, a concrete batch plant located at 2105 S. McDonald St., is still operational. The city is still in litigation with this operation. Until the case is adjudicated, city staff will continue to seek voluntary compliance with all applicable regulations.

S.H. 5 Reconstruction

TxDOT continues to move forward with its plans to reconstruct State Highway 5 (McDonald Street) between McKinney’s southern city limits (approximately Old Frisco Road) and U.S. 380. TxDOT plans to commence construction on the portion of S.H. 5 between the Greens of McKinney and the subject properties in late 2024 or early 2025. It is anticipated that concrete batch plants will be needed to facilitate this road’s reconstruction and likely would be in this vicinity even if these concrete batch plants were already gone from their properties. It should be noted that preliminary design plans for S.H. 5 reflect an elevated roadway section in this area which means that properties located on the east side of S.H. 5 will be mostly obscured from the view of properties located on the west side of S.H. 5.

Q&A Regarding Recent Concrete-related Operations in McKinney

Posted December 2021

1. What is happening with batch plant operations on State Highway 5? 

Cowtown Readymix and Martin Marietta should have ceased operations in 2021 per the amortization ruling by the McKinney Board of Adjustment on July 29, 2020. However, the rulings are being challenged in the courts by the operators. In the meantime, the city is trying to gain voluntary compliance while court proceedings progress.

2. Martin Marietta is moving to McKinney’s ETJ?

Martin Marietta (TXI Operations) purchased approximately 39-acres in McKinney’s ETJ in early 2021. The tract is generally located east of FM 546 and north of CR 317, and it is primarily designated for industrial use in the city’s future land-use plan. 

The city is not aware of specific plans for this site. However, staff has contacted Martin Marietta regarding the 2016 Pre-Annexation Development Agreement on the property, which requires annexation into McKinney city limits before any subdivision or development activity occurs.

3. Is McKinney getting a concrete recycling center?

A concrete recycling operation located at 2540 E. University Drive has been in operation since 2015 in association with the construction waste landfill (380 McKinney C&D Landfill).

In the fall of 2021, the City Council approved an annexation and zoning request to develop another concrete recycling center on a 54-acre tract near FM 546 and CR 317. This site sits directly south of the 39 acres recently purchased by Martin Marietta. 

Although the proposed development involves working with concrete materials, it would NOT produce or manufacture them. Instead, a concrete recycling operation crushes, sorts, and re-uses concrete materials (primarily base material) for use in future roadway construction projects. 

Summary of Legal Action

Posted June 7, 2022

City Council has approved a letter modifying the terms of the agreement we had with Lhoist. The modifications allow Lhoist’s operations to continue on-site until August 15, 2022, at which point the operations must cease. The lime slurry equipment must be removed from the site by August 31, 2022.

Posted Oct. 5, 2021

The city went through the amortization process with Martin Marietta and Cowtown in 2020. With this, the Board of Adjustment (BOA) established cessation dates for each operator based on information provided to them in an amortization study completed by an outside consultant. 

Based on the amortization proceedings, Cowtown is to cease their current operations by August 26, 2027 and Martin Marietta was to cease their current operations by April 29, 2021. Both operators are challenging the amortization process, and the city is actively litigating and negotiating to uphold the city’s desire of relocating these plants from S.H. 5.

Posted Oct. 5, 2020

The city has been closely monitoring the set of concrete batch plant facilities to ensure operations comply with city regulations. We have issued several notices of violations and citations but none of these actions have permanently addressed ongoing noncompliance issues. While we are still trying to gain compliance, the city has now turned to the legal system to remedy the situation.

 The city entered into a relocation agreement with Lhoist North America of Texas, LLC and will cease operations on or before May 31, 2022. At the direction of City Council, the Board of Adjustment issued compliance dates for the Martin Marietta Ready Mix facility (April 29, 2021) and the Cowtown Redi-Mix facility (Aug. 26, 2027) by which the properties must cease their current uses and operations. These compliance dates have been challenged in court proceedings, but for now, these are the dates the respective businesses must cease current operations.

 As we continue through the legal process, the city will monitor these businesses and coordinate with property owners to gain voluntary compliance.

Update on Cowtown Redi-Mix Amortization Case

Posted Oct. 1, 2020

At the Board of Adjustments meeting on September 30, 2020, the Board unanimously voted to approve a compliance date of August 26, 2027 for the nonconforming concrete batch plant operated by Cowtown Redi-Mix at 2015 S. McDonald Street. This is the date by which the existing use will need to cease operations or come into full compliance with applicable regulations.

Amortization Case Tabled

Posted Aug. 25, 2020

The amortization case originally scheduled to be considered by the Board of Adjustments on August 26, 2020 will be tabled in order to afford city staff additional time to address procedural matters. This amortization case will now tentatively be considered by the Board on September 30, 2020. The amortization case will include a recommended compliance date by which the nonconforming concrete batch plant operated by Cowtown Redi-Mix at 2015 S. McDonald Street will need to cease operations or come into full compliance with applicable regulations.

Settlement Approved

Posted Aug. 4, 2020

In early June 2020, City Council approved a settlement agreement with L’hoist North America of Texas, LLC that outlines provisions for L’hoist to cease their current lime slurry operation located at 2005 S. McDonald St. and remove all associated equipment from the site on or before May 31, 2022. If L’hoist complies with all of the requirements of the settlement agreement, the city agrees to pay a one-time fee of $500,000.

On July 29, 2020, the Board of Adjustments unanimously voted to approve a compliance date of April 29, 2021 for the nonconforming concrete batch plant operated by TXI Operations, LP/Martin Marietta Redi-Mix at 2005 S. McDonald Street. This compliance date requires that the nonconforming concrete batch plant use at that site be closed or otherwise come into compliance with the requirements of the zoning ordinance on or before April 29, 2021. This recent Board action is part of the city’s amortization efforts.

On August 26, 2020, the Board of Adjustments is tentatively scheduled to consider a compliance date for a nonconforming concrete batch plant operated by Cowtown Ready Mix at 2015 S. McDonald Street as part of the City’s ongoing amortization efforts.

TCEQ Investigation Report released 

Posted Sept. 25, 2019

The TCEQ has released its investigation report on the dust incident at Martin Marietta Ready Mix.

Update on dust incident at Martin Marietta Ready Mix

Posted Aug. 5, 2019

Based on documents provided by representatives from Martin Marietta to the city and TCEQ, a more full picture of the events of July 18, 2019, is now known. On the evening of July 18, 2019, an automatic shutdown system for one of the cement silos failed to shut down a blower motor. The result was that the system continued to fill a silo with cement beyond the capacity of the silo. A pressure release value eventually activated and released the pressure along with the particulate matter. 

It is conservatively estimated that the event lasted approximately 5 hours and 15 minutes during which no more than 8,000 pounds (4 tons) of cement dust left the facility’s boundary. The facility was not operational or staffed during the event so the release continued until the system was shut down manually. Additional investigations are still ongoing and cleanup of the areas affected continues. Property owners seeking assistance with cleanup from this event are encouraged to contact Martin Marietta representatives at 972-647-3300 or [email protected].

Posted July 20, 2019

At approximately 11:30 p.m. on July 18, 2019, the McKinney Fire Department was dispatched for a reported cloud of smoke from one of the facilities located on the east side of S.H. 5 (McDonald Street) just north of the intersection with Spur 399. No fire was found but they observed a cloud of dirt and dust being emitted from some equipment on site.

The City of McKinney is still investigating the incident and working with representatives with the Texas Commission on Environmental Quality (TCEQ). Individuals with detailed information about this incident are encouraged to contact Michael Quint, Executive Director of Development Services . Concerned residents can also contact the TCEQ to make an environmental complaint.

Due to the preliminary nature of the investigation, immediate health impacts are not known at this time. Residents are encouraged to take any health precautions that they deem appropriate.

Upon completion of its investigation, the City of McKinney will explore all enforcement options available. The city will also be requesting that the TCEQ do the same.

Statement and cleanup assistance information from Martin Marietta

Martin Marietta was distressed to learn of an apparent release of articulate matter at our McKinney Ready Mix Plant Thursday night. This site is regulated by the Texas Commission on Environmental Quality (TCEQ), which has visited the location in response to this incident. We are working with the TCEQ to determine what caused this release and will take the necessary steps to ensure it does not occur again. In the meantime, we have shut the Plant down as we investigate the release.

Additionally, we have hired companies to clean-up the release. We are committed to working with you, our neighbors, to remove the impacts of the release from your property. For those affected by the release, we are offering indoor and outdoor home cleaning, including cars, paid for by Martin Marietta.

In the coming days, members of our team will be available at our site and in your neighborhood to speak with you and answer questions you may have. At this time, we are focusing our efforts on cleaning and removing the particulate matter from your neighborhood.

We ask that residents who have been affected by this incident and would like cleaning services to contact Martin Marietta at:

Phone: 972-647-3300
Email: [email protected]

Information provided by Texas Commission on Environmental Quality (TCEQ)

Posted July 24, 2019

Although the vast majority of cement is comprised of limestone (primarily calcium carbonate), various metals are also present in cement, as noted by some citizens. However, in regard to this short-term emission event, the potential for health effects (e.g., skin, respiratory, eye irritation) stems from the physical presence and corrosive nature of the cement dust particulate matter itself rather than specific constituents. Once the dust is removed, this event is not expected to represent a long-term concern.

Posted July 22, 2019

In light of a presumed acute emission event where cement dust deposition occurred overnight on the off-site property, it should be noted that cement dust is corrosive so it is best to avoid direct skin, eye, respiratory system, or other contact with it. That is, care should be taken to prevent cement dust exposure of the skin, eyes, or respiratory system since irritation and even tissue damage could occur with sufficiently high exposure. For example, protective equipment such as safety goggles and impervious gloves/clothing/shoes can be used to help reduce the potential for significant eye or dermal exposure.

If you have come into contact with cement dust, use common sense. For example, wash skin with soap and water in the event of dermal contact, or rinse eyes thoroughly for several minutes with clean water (with any contacts removed) if eye exposure occurs, and seek timely medical attention from your doctor or other medical care provider for any health concerns (e.g., respiratory symptoms, skin or eye irritation). These recommendations are to help address this short-term concern; once the dust is removed, this event is not expected to represent a long-term concern.

Our Toxicology Section is available to speak with citizens concerned with impacts from the dust as well. They can be reached at 877-992-8370.

Frequently Asked Questions About Concrete Batch Plants

Posted July 2018

Some manufacturing operations located at State Highway 5 (McDonald Street) near Stewart Road have recently received attention from nearby residents due to concerns about various issues like noise, lighting and air quality. These operations include two concrete batch plants (TXI / Martin Marietta Ready Mix and Cowtown Redi-Mix) and a lime slurry facility (Lhoist North America of Texas). In response to citizens’ concerns, the city is actively monitoring the properties and working to gain compliance with all applicable city regulations.  

1. What is a concrete batch plant?

A concrete batch plant or batch plant is a manufacturing operation that uses equipment to combine various ingredients to form concrete.

2. What is lime slurry?

Lime slurry is used for a variety of industrial, municipal and environmental applications. In McKinney, it is commonly used to stabilize the ground underneath a roadway.

3. Why are concrete batch plants necessary?

In a rapidly growing community such as McKinney (and Collin County), the production of concrete is a critical part of construction activities. Concrete is used in sidewalks, roads, building foundations, walls for buildings, etc. Many concrete batch plant facilities operate temporarily for specific construction projects and often go unnoticed by the average citizen.

4. How long have these uses been at this location?

The area has been designated for industrial land uses since as far back as the 1964 General Development Plan (now referred to as a Comprehensive Plan) for the city. There have been manufacturing uses in this location, including concrete batch plants, since at least 1996.

5. Where are concrete batch plants allowed?

In general, temporary concrete batch plants that meet all applicable regulations are allowed to exist on a construction site in support of construction activities. However, permanent concrete batch plants are only allowed within certain industrial zoning districts as outlined in the city’s Zoning Ordinance. Zoning and rezoning requests that come before the city are reviewed and evaluated for conformance with the city’s comprehensive plan and are heard before the Planning and Zoning Commission and the City Council for consideration and action.

6. If allowed by the Zoning Ordinance, will City Council review and approve development applications for a permanent concrete batch plant?

No. Temporary concrete batch plants that meet all applicable regulations are permitted through the standard development permitting process by city staff. In order to build a permanent concrete batch plant, a site plan must first be approved. Typically, site plans that meet applicable development regulations are approved at the staff level. Staff does not have the authority to disapprove a site plan that meets all applicable regulations. If a site plan does not meet all applicable regulations, staff must forward the site plan to the Planning and Zoning Commission for action. In rare instances, a property’s zoning may require City Council approval.

7. What types of regulations apply to these types of facilities to ensure the health, safety, and general welfare of the public?

The city has regulations that govern a number of aspects of the built environment, including but not limited to noise, lighting, air quality, vehicular traffic, stormwater, landscaping, screening and the overall development of a site.

8. How does the city enforce its regulations and ordinances?

Enforcing regulations in McKinney is a partnership between city staff and the public. While staff strives to proactively monitor and enforce all applicable city regulations, due to the rapid growth and large incorporated area of McKinney, some enforcement comes about as a result of citizen-initiated concerns.

9. What can the city do about air pollution?

Air quality is primarily governed by statewide rules set forth by the Texas Commission on Environmental Quality (TCEQ). The city proactively works with the TCEQ to ensure that all applicable regulations are satisfied. Given recent concerns related to air quality raised by some McKinney citizens, the city is currently evaluating ways in which we can supplement the work that TCEQ has performed to date.

10. What is the city doing to protect residents located near permanent concrete batch plants?

The Texas Commission on Environmental Quality (TCEQ) receives many complaints statewide related to many different environmental issues. Because of the volume of complaints received, their resources are typically spread very thin, making enforcement difficult. However, the McKinney Code of Ordinances allows the city to assist the TCEQ in this process. Ensuring that businesses and operators comply with all applicable city code requirements is a priority to the city, and we are currently evaluating ways in which we can supplement the work that TCEQ has performed to date.

11. What is the city doing to control the overnight lighting of permanent concrete batch plants?

The city’s Code of Ordinances governs the lighting on all properties within the city. This governance includes capping the amount of light that can cross a property line and how light is controlled on a site. A site’s lighting is designed, installed and inspected as part of the traditional development process but old properties may have lighting in place that no longer meets current regulations. Regardless of the age of the site, city staff investigates all lighting complaints and utilizes equipment to test lighting levels. If violations are identified, then appropriate enforcement actions will be pursued in order to gain compliance with applicable regulations.

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