Minutes 12/10/1998 - Laserfiche WebLink

Home Browse Search

responsible and cost effective ways. THURSDAY, DECEMBER 10. 1998 City Manager Earl B. Reynolds, Jr. referred to the efforts as flow control without calling it flow control. Council next received a presentation from Mr. Joyce and Ms. Jan MeHargue, also of Joyce Engineering, on current conditions and issues related to the Martinsville City Landfill. This presentation began with a brief history of the landfill, which had begun operations in 1971. It was noted that the landfill had been built over three streams which were currently piped beneath the fill areas, and that the staff of Joyce Engineering, in concert with City staff, had discussed several ways to mitigate and protect against the possible failure of any of the existing pipes and circumstances related to such failure. Ms. McHargue then presented their firm's analysis of the piping system with regard to hydraulic capacity, and various pipe failure scenarios under both existing conditions and with remedial measures in place. Three drainage areas related to the three pipes in use were described, with varying degrees ofponding, flooding and impact to the landfill. Remedial measures considered were then presented, including tunneling and placement of new pipes, provisions for bleeding down trapped water following pipe failure, purchase of additional property to avoid problems for adjacent landowners, installation of a supplemental pump system and a water level monitoring system, and slope protection measures. Ms. McHargue concluded with a recommendation of four remedial activities which could be implemented independently or in combination. These measures included installation of bleed- down pipes, to be sleeved within the existing pipes; purchase of additional property in areas where flooding might occur; installation of water level monitoring equipment to provide early warning of pipe failure and flooding; and installation of a synthetic liner on the face of the landfill to provide slope protection from water intrusion beneath the landfill. Further discussion then occurred among Council Members, City staff and Joyce Engineering staff regarding elements of the remediation presentation and cost estimates for some of the recommended work.