What are the opening hours?

Monday 6am - 5pm Tuesday 6am - 5pm Wednesday 6am - 5pm Thursday 6am - 5pm Friday 6am - 5pm Saturday 6am - 2pm

Great Lakes Aggregates - Sylvania Minerals, LLC

Name: Great Lakes Aggregates - Sylvania Minerals, LLC
Address: 5699 Ready Road, South Rockwood, MI, 48179, US
Telephone: +17347837400
Price range: Not applicable

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Great Lakes Aggregates - Sylvania Minerals, LLC

Sylvania Minerals is a sandstone and limestone quarry located in the Village of South Rockwood, in Monroe County, Michigan

Sylvania Minerals is a sandstone and limestone quarry located in the Village of South Rockwood, in northeast Monroe County Michigan. We offer a diverse product line of premium quality construction aggregates. All of Great Lakes Aggregates facilities are pre-qualified MIchigan Department of Transportation Aggregate Sources and are open to the general public.

06/09/2026

Our Crooks Road location is now open 6 days a week!

06/05/2026

Today we had the honor of hosting Iafrates’s 2026 interns. They went on a tour of the plant, yard, quarry and even experienced a blast. Thank you for choosing us for a visit and we wish you all good luck in the future!

05/29/2026

Today was the end of an era for our GLA Family. After decades of work in the aggregate industry we bid our Best Wishes and Happy Retirement to Mike Parson's. He will be greatly missed. The torch has been passed to Ryan Lumpford, who has been with us for the past year. Any sales needs can be directed towards Ryan at 734-558-7757 or [email protected]

05/22/2026

Have a safe weekend!

04/13/2026

Now that the weather is warming up check out our new hours!

02/18/2026

All Recycled Aggregates locations will be closed Wednesday, February 18 through Thursday, February 19 for mandatory training. Our Sylvania Great Lakes Aggregates - Sylvania Minerals, LLC location will be open. Thank you for your understanding, we strive to keep all our employees and customers safe.

12/23/2025

Please see the attached Holiday Schedule. We wish you all a safe and happy holiday season. Merry Christmas and Happy New Year!

12/11/2025

New winter hours at our Sylvania Minerals location effective Monday December 15th.

11/12/2025

🍂 Thanksgiving Holiday Notice 🦃
All of our locations will be closed Thanksgiving weekend so our employees and customers can enjoy time with their families.

❄️ Winter Hours Beginning Soon
We’ll be adjusting to our winter schedule starting December 1.

We truly appreciate your business and wish you a safe, joyful, and memorable Thanksgiving!

11/03/2025

It was a busy end to October. We participated in three Trunk or Treats throughout our communities. This was our second year participating at Ritter Elementary School and the Village of South Rockwood and our first year at the Monroe VFW supporting the Young Marines. after 600 treat bags were filled, the costumes and the people we met made all the hard work worth it. Thank you to all who helped out!

Address

5699 Ready Road
South Rockwood, MI
48179

Opening Hours

Monday	6am - 5pm
Tuesday	6am - 5pm
Wednesday	6am - 5pm
Thursday	6am - 5pm
Friday	6am - 5pm
Saturday	6am - 2pm

Telephone

+17347837400

Website

http://www.greatlakesagg.com/

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