Lancaster County Solid Waste Management Authority

ARM successfully managed the completion of a 2-stage stream restoration and wetland restoration/enhancement and creation mitigation project for Lancaster County Landfill, Mount Joy and 

Rapho Townships, Lancaster County, Pennsylvania in accordance with state and federal encroachment permit requirements.  Construction of the mitigation site occurred over two seasons; fall 2017 and spring/summer of 2018.  The project consisted of 2,346 linear feet of stream channel restoration along Little Chiques Creek and tributaries; 3.9 acres of wetland restoration and enhancement; and 4.7 acres of replacement wetlands.  The wetland mitigation provides a complex of permanent shallow pools, emergent/scrub-shrub habitat, and a forested fl

oodway adjacent to the Little Chiques Creek and an unnamed tributary to facilitate overall watershed functional services.  The stream mitigation entailed a combination of log structures/vanes, culvert and fill removals, bank grading and stabilization, and riparian plantings to improve stream stability, reduce erosion, improve habitat diversity, restore functions and maintain water quality.  The complex project involved close agency coordination and site visits, permit extensions/amendments, construction drawing updates and bid package preparation, value engineering, resource protection, 20-week construction oversight (total), monitoring, and compliance reporting. 

 

Agency Coordination and Permitting

ARM scientists completed extensions and modifications to Pennsylvania Department of Environmental Protection (PADEP) and United States Army Corps of Engineers (USACOE) permits, which required several updates for compliance.  ARM completed notifications to state and federal agencies prior to construction.  ARM coordinated design modifications and approvals during construction in a time-efficient manner to avoid schedule delays.  Weekly status updates and field review meetings kept the USCOE and PADEP informed throughout construction. 

 

Construction Drawing and Bid Document Preparation and Pre-bid Meeting

ARM professionals prepared the final construction drawings.  ARM completed value engineering and coordinated modifications to the design with the resource agencies.  Design approvals resulted in construction cost savings of approximately $214,500.    ARM prepared the bid schedule and technical specifications and led the pre-bid meeting with prospective bidders to discuss the plans, specifications, and schedule.

 

Pre-construction Resource Protection

ARM scientists located wetlands and the streams with flagging for easy identification to avoid inadvertent impacts upon existing wetlands and adjacent agricultural land during constructi

on.  ARM scientist and engineers attended pre-construction meetings to discuss resource concerns.   ARM completed the recordation of the conservation area to protect the wetlands in perpetuity.  ARM assisted in the installation of signs to mark the conservation area and prevent trespassing.    

 

 

Mitigation Construction Quality Assurance

The PADEP and USACOE approved ARM personnel to provide inspection and supervision of the mitigation project and maintain compliance with permit conditions based upon demonstrated 

experience/success for past similar mitigation/restoration projects.  The agencies approved ARM’s monitoring approach regarding on-site inspections during construction.  Quality assurance included completion of as-built plans, daily inspection reports, and a construction compliance report.  ARM developed a permit tracking system to document compliance.

 

Wetland and Stream Compliance Monitoring

Wetland and stream monitoring is ongoing to evaluate performance criteria related to vegetation, soils and hydrology over time and comply with approved mitigation plan and permit requirements.  Vegetation monitoring began immediately to assess the health of planted species and prevent invasive species establishment.  ARM completed the as-built survey which will serve as a basis for the mitigation monitoring.