The Colorado Rocky Mountain Solid Waste Association of North America (SWANA) Annual Conference will be held in Colorado Springs, Colorado on October 1 and 2, 2019. DBS&A Engineer, Kelly Jayne, PE, CFM, will present a case study on stormwater design for a 1,000-year project life.

Ms. Jayne is a Professional Engineer and Certified Floodplain Manager with over ten years of experience. Her presentation will describe the design challenges associated with the U.S. Department of Energy’s plan to construct one of its largest Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) landfill covers at the 97-acre subsurface disposal area (SDA) at Idaho National Laboratory (INL).  DBS&A’s evapotranspiration (ET) surface barrier design will span approximately 160 acres and provide a minimum of 10-foot coverage of all waste to minimize the potential for plant, animal, and inadvertent human intrusion. Challenging design constraints include: designing for a 1,000-year storm using only natural construction materials while maintaining site access with minimal maintenance requirements for all stormwater infrastructure. The SDA is in a naturally low topographic area and has shallow slopes immediately adjacent to the SDA complicating routing stormwater away from the cover. Ms. Jaynes’ presentation will describe the cover design process with a focus on the stormwater infrastructure development strategy.  She will highlight the following key design concepts: use of natural materials, low flow crossings for site access, and tie-in to existing stormwater channels. Her presentation will also highlight the design strategy for channel transitions between materials and challenges of integrating the channel with adjacent topography.

To learn more about DBS&A’s solid waste stormwater management expertise, click here.

To learn more about the conference, click here.