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List of pre-qualified supplier's concrete mix designs

Provided by local ready-mix suppliers

All businesses supplying concrete within Unincorporated Marin County are welcome to pre-qualify their mix design(s) by completing the application form.

The following is a list of pre-qualified concrete mix designs that comply with the County's Low Carbon Concrete Ordinance as registered by ready-mix businesses supplying concrete within the County. This list does not endorse any one business.

 

Pre-qualified Concrete Mix Designs
County Issued Ref. No. Supplier Mix design (No./Code) Application Strength @ 28 days (psi) W/C Ratio Binder Contact
00004 Bauman Landscape and Construction, Inc. 02-6001 Sidewalks, Curbs, and Gutters 4000 0.50 451 lbs. Cmt, 20% Fly Ash Derek Davis
00005 Bauman Landscape and Construction, Inc. 18-5600 Sidewalks, Curbs, and Gutters; Slabs; Flatwork 3000 0.50 409 lbs. Cmt, 33% Fly Ash Derek Davis
00006 Bauman Landscape and Construction, Inc. 19-6501 Sidewalks, Curbs, and Gutters; Slabs; Flatwork; Walls; Beams 4000 0.45 428 lbs. Cmt, 30% Fly Ash Derek Davis
00007 Bauman Landscape and Construction, Inc. 20-5502 Sidewalks, Curbs, and Gutters; Slabs; Flatwork 3500 0.50 414 lbs. Cmt, 20% Fly Ash Derek Davis
00008 Bauman Landscape and Construction, Inc. 78-50500 Sidewalks, Curbs, and Gutters; Slabs; Flatwork 2500 0.50 329 lbs. Cmt, 30% Fly Ash Derek Davis
00009 Bauman Landscape and Construction, Inc. 71-60450 Walls; Sidewalks, Curbs, and Gutters; Slabs; Flatwork 4500 0.45 395 lbs. Cmt, 30% Fly Ash Derek Davis
00010 Rich Readimix Concrete 608-118LC Sidewalks, Curbs, and Gutters; Walls; Beams; Slabs 3000 0.55 395 lbs. Cmt, 30% Fly Ash Shaun Lennon
00011 Rich Readimix Concrete 3161LC Sidewalks, Curbs, and Gutters; Walls; Beams; Slabs 4000 0.50 451 lbs. Cmt, 20% Fly Ash Shaun Lennon
00012 Rich Readimix Concrete 708-118LC Sidewalks, Curbs, and Gutters; Walls; Beams; Slabs 4000 0.45 456 lbs. Cmt, 30% Fly Ash Shaun Lennon
00013 Rich Readimix Concrete 55B-LC Sidewalks, Curbs, and Gutters; Walls; Beams; Slabs 3000 0.52 388 lbs. Cmt, 25% Fly Ash Shaun Lennon
00014 Rich Readimix Concrete 50B-LC Sidewalks, Curbs, and Gutters; Walls; Beams; Slabs 2500 0.62 352 lbs. Cmt, 25% Fly Ash Shaun Lennon
00015 Eco Terra Ready-Mix 6SK4K1X425F Sidewalks, Curbs, and Gutters; Walls; Beams; Slabs 4000 0.55 423 lbs. Cmt, 25% Fly Ash Darrell Carpenter
00016 Rich Readimix Concrete 9067LC Sidewalks, Curbs, and Gutters; Walls; Beams; Slabs 4500 0.45 476 lbs. Cmt, 25% Fly Ash Shaun Lennon
00017 Shamrock Materials 451115E1 Sidewalks, Curbs, and Gutters; Walls; Beams; Slabs 3000 0.53 388 lbs. Cmt, 25% Fly Ash James Swanson
00018 Shamrock Materials 456115E1 Sidewalks, Curbs, and Gutters; Walls; Beams; Slabs 4000 0.49 424 lbs. Cmt, 25% Fly Ash James Swanson
00019 Shamrock Materials 461115E1 Sidewalks, Curbs, and Gutters; Walls; Beams; Slabs 4500 0.45 458 lbs. Cmt, 25% Fly Ash James Swanson
00020 Shamrock Materials 465115E1 Sidewalks, Curbs, and Gutters; Walls; Beams; Slabs 5000 0.42 494 lbs. Cmt, 25% Fly Ash James Swanson
00021 Shamrock Materials 3FD1BSE1 Sidewalks, Curbs, and Gutters; Walls; Beams; Slabs 3000 0.53 388 lbs. Cmt, 25% Fly Ash James Swanson
00022 Shamrock Materials 3FA1B5E1 Sidewalks, Curbs, and Gutters; Walls; Beams; Slabs 4000 0.49 423 lbs. Cmt, 25% Fly Ash James Swanson
00023 Shamrock Materials 3611B5E1 Sidewalks, Curbs, and Gutters; Walls; Beams; Slabs 4500 0.45 458 lbs. Cmt, 25% Fly Ash James Swanson
00024 Shamrock Materials 3E21BSE1 Sidewalks, Curbs, and Gutters; Walls; Beams; Slabs 5000 0.42 494 lbs. Cmt, 25% Fly Ash James Swanson
00025 Shamrock Materials 254112E1 Walls 3000 0.55 409 lbs. Cmt, 25% Fly Ash James Swanson
00026 Shamrock Materials 2F0112E1 Walls 4000 0.50 450 lbs. Cmt, 25% Fly Ask James Swanson
00027 Shamrock Materials 2EF112E1 Walls 5000 0.45 495 lbs. Cmt, 25% Fly Ash James Swanson
00028 Brothers Concrete Ready Mix 6SK4K1X425F Sidewalks, Curbs, and Gutters; Slabs; Foundations; Beams; Walls 4000 0.55 423 lbs. Cmt, 25% Fly Ash Leilani Magana Ochoa
00029 Shamrock Materials F23110XA CDF/CLSM 100 1.42 24 lbs. Cmt, 90% Fly Ash James Swanson
00030 Shamrock Materials F23188XA CDF/CLSM 100 1.42 24 lbs. Cmt, 90% Fly Ash James Swanson

*Last updated 7/9/2025

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Page last updated on April 28, 2026.

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