K&W Engineers and Consultants

Client: Diocese of Harrisburg

Owner: Diocese of Harrisburg

Site Improvements Include:

• Consolidation of several existing lots for re-subdivision to create residential lots.
• Sixty-Five new single family residential homes.
• Three new roads, sidewalks, and curbing.
• Sanitary sewer and water extensions.
• Stormwater management facilities including Best Management Practices for stormwater infiltration.
• Forty-six acres of dedicated open space.

Challenges

• The site was located in the Agricultural Zoning District.
• The site consisted of 23 acres of wetlands, floodplain, and steep slopes.
• The use of gravity sewer, due to the existing terrain, was not possible in all areas of the development.

Solutions

• K&W prepared an open space design to permanently protect the existing wetlands, floodplain, and steep slopes while maintaining the desired lot density.
• K&W designed a sanitary sewer collection system comprised of gravity sewers and grinders pumps to eliminate the need of a new pumping station. A twenty-five (25) life cycle cost analysis was performed to determine the most cost effective means of sewering the development.
• A special sewer rate district was created for homes connected to the low pressure grinder system.