STORM DRAINAGE DESIGN

Lierl Dam

In 1996, Dr. Jerry Lierl contacted Cardinal to design a lake on a Stone Creek tributary in Bracken County for retention and recreational purposes.  After a thorough investigation (including a geotechnical analysis) of the property and review of governmental procedures, we designed the 22.6-acre lake.  The project included a 40-foot high Class “B” dam, 25-foot wide emergency spillway, and main release structure with anti-vortex device and trash rack.  The lake was over 35 feet deep, had a storage volume of 330 acre-feet, and encompassed a drainage area of approximately 750 acres.

In 2000, Dr. Jerry Lierl contacted Cardinal to design another lake on a Stone Creek tributary just upstream of the previously mentioned lake.  Again after a thorough investigation (including a geotechnical analysis) of the property and governmental procedures, we designed the 25-acre lake to include a 30-foot wide x 46-foot high Class “B” dam, 30-foot wide emergency spillway, and main release structure with anti-vortex device and trash rack.  This lake was also over 35 feet deep and had a storage volume of 450 acre-feet.

Bethesda North Hospital

Over the past 13 years, Cardinal Engineering Corporation has provided Engineering, Architecture, and Surveying Services to the TriHealth on over 200 projects.  In 2000, TriHealth contacted Cardinal to investigate the existing storm drainage system at the 30-acre Bethesda North Hospital complex in preparation for a large parking lot and building expansion.  The existing drainage system was failing and some of the buildings were being flooded.  Cardinal performed an onsite inspection of the grounds, existing storm drainage system, and reviewed old design drawings for the complex for reference.  We then had our survey crew field locate the existing drainage system and prepare a topography survey of the existing drainage areas.  Once all our initial onsite and field crew data had been assembled, we setup a hydraulic model to analyze the storm drainage for the existing system and the large parking lot and building expansion. 

 

After a thorough analysis, we designed a new storm water drainage system that included over 2,000 feet of storm drainage pipe ranging in size from 12” HDPE to 42” HDPE.  Also, a storm water detention basin with a design volume of 3.5 acre-feet was designed.  All structures were constructed.  The detention basin provided detention for the 10-year master plan of complex.