DASNY Mid-Hudson Forensic Psychiatric Center Rehabilitation - Site Utility Review

The Mid-Hudson Forensic Psychiatric Center (MHFPC) serves as a secure adult psychiatric center for patients admitted by court order. The Dormitory Authority State of New York (DASNY) is evaluating replacement of the existing MHFPC with a new 275 bed forensic services building. As part of this evaluation, JM Davidson Engineering, D.P.C. (JMD), a subconsultant to Ramboll/ O’Brien & Gere, completed preliminary design of a new sewer pump station to convey sanitary flow from the MHFPC to the City of Middletown Wastewater Treatment Plant, roughly 18,000 linear feet away with over 120 feet of elevation change along the alignment. In addition, JMD prepared a preliminary opinion of probable construction cost for the entire utility package, including the sewer route, a water main extension, and sewer pumping station.

The work performed included:

• Preparation of preliminary system curves using LiDAR data and Google Earth to determine the likely profile of the new forcemain.
• Research and evaluation of pumps and associated curves to fit the low head, high flow design application. Three types of wastewater pumping stations were evaluated, including submersible, suction lift and direct-inline pumps.
• Preliminary wet well sizing and layout using the recommendations set forth in the Hydraulic Institute Standards.
• Identification of other design considerations for the detailed design phase, including odor control, an emergency generator, and remote monitoring system.
• Draft Basis of Design Report text to document design criteria, alternatives, and recommended next steps.
• Preparation of capital and life cycle cost estimates for each of the three pumping stations evaluated.