Brookings Landfill

Brookings Landfill

Location: Brookings, S.D.

Client: City of Brookings, S.D.

The City of Brookings, S.D., operates a sanitary landfill that reached capacity in 1994. Burns & McDonnell was retained to design a new sanitary landfill near the City of Brookings. A 70-acre landfill was designed to dispose of the 100 tons per day of waste generated by residents and businesses of Brookings and five outlying counties with a total population of 35,000.

Investigations

Geologists from Burns & McDonnell supervised the subsurface investigation. The landfill site was located in gently rolling hills, on a drainage divide. The investigation consisted of soil borings, soil and water sampling and testing, and evaluation of existing geologic data.

Permitting and Design

The design of the landfill included a compacted soil liner design, leachate management system, surface drainage control, gas and groundwater monitoring programs, and discussion of full sequence and final closure. Meetings were held with the State Regulatory Agency throughout the design process to resolve questions and concerns regarding the landfill design.

Temporary and permanent leachate collection systems were designed into the landfill. The collected leachate will be pumped to a holding pond and sprayed over closed portions of the landfill or hauled to a wastewater treatment plant. Siltation ponds to settle out excessive silt in storm water runoff were also designed throughout the site.

An operational plan was developed addressing the daily operations of the landfill. This plan addressed soil excavation, daily cell construction, sequence of filling, compacting and covering of waste, litter and disease vector control, and contingency procedures for emergencies. Also discussed in the operation plan were the handling and disposal of special wastes.

The final design and permit application to the South Dakota Department of Water and Natural Resources was prepared and submitted for review and approval.

Closure

The closure plan for the landfill addresses the future operation of the leachate collection system, final grading and seeding of the landfill, ongoing maintenance of the landfill surface, groundwater sampling, and record keeping.

A corrective action program was also developed to assure sufficient funds are available to pursue remedial activities in the event any environmental and health-based limits appear to be exceeded.