K&W Engineers and Consultants

Client: Crabtree, Rohrbaugh & Associates

Owner: Cumberland County Board of Commissioners

Site improvements include:

• Extension of public water and sanitary sewer services
• Sanitary Sewer Lift Station
• Multiple access drives and new parking areas totalling 102 spaces
• Loading area with elevated loading dock
• Anti-terrorism/site security measures
• Stormwater collection/conveyance, detention and water quality facilities
• A National Environmental Policy Act (NEPA) Study and Environment Impact Assessment Report was required for construction of the communicator tower
• Landscaping

Challenges

• The County's objective was to design the building to meet current anti-terrorism/site security design standards and FEMA Guidelines for Community Shelters.
• The site is underlain by high calcium limestone geology susceptible to sinkholes.
• The site drains to a PADEP designated High Quality Stream, requiring individual permits for stormwater discharge.
• The proposed 130' communication tower required a Special Exception from the Township
• The Township expressed concerns with the addition of vehicular traffic from this project to an adjacent roadway intersection

Solutions

• K&W incorporated multiple anti-terrorism/site safety measures into the site layout including: security fencing, anti-ram protective berms and retaining walls, segregated employee/public parking, extended building buffers, traffic calming measures, site lighting.
• K&W engaged a qualified consultant to determine that onsite soils were suitable for use as stormwater basin liners providing a cost savings for the Owner.
• K&W designed innovative stormwater BMP facilities to treat site runoff without the use of traditional infiltration methodologies.
• K&W prepared an Individual NPDES permit for approval by PADEP and The LeTort Regional Authority.
• K&W prepared an Environmental Impact Assessment in compliance with NEPA regulations
• K&W offered expert testimony at the Township zoning hearing board meeting for the Special Exception application.
• K&W prepared an abbreviated traffic analysis which determined that the impact of the proposed improvements on the adjacent roadway system were minimum, thereby saving the Owner the engineering costs that would have been associated with a full traffic impact study.