Welcome to Engineered Concrete Products, LLC.

Rapid City's Premier Precast Concrete Supplier.

Precast Concrete Products

Light Duty - Tanks

1,000 and 1,500 Gallon Septic Tanks

1,200 and 1,800 Cisterns 

1,000, and 1,500 Oil-Water-Sand Separators

Heavy Duty Vaults


Pump and Valve 

Storm Water Inlets and Junction Boxes - Standard DOT and Custom Sizes

Larger Engineer Tanks for Septic, Cisterns, or Oil-Water-Sand Separators.

Box Culverts

Custom Sizing

Flared End Sections

Three Sided


About Us


  Become an industry leader in the precast concrete market through customer satisfaction and owner loyalty.  

Mission Statement

Manufacture precast concrete products that provide engineering solutions, improved constructability, at a competitive price.

Leadership Team

David Hoffman

David has spent 18 years in the concrete industry.  The last 10 years has been in precast concrete market developing and managing processes to build awarding precast products.  David has a B.S., Mechanical Engineering, SD School of Mines and Technology.  

William Huber

William has been in and around the construction industry for the past 31 years, managing and developing construction processes and products.  William has a B.S., Civil Engineering, SD School of Mines and Technology.   

Contact Us

Get a Quote

William Huber




David Hoffman




Engineered Concrete Products, LLC.

PO Box 1278 Rapid City, SD 57709 or 3335 Seger Drive, Rapid City, SD 57701