Secondary and Cumulative Impacts Master Management Plan - 2014

TOWN OF MORRISVILLE

TABLE ES-1 Areas of Potential Impacts to be Addressed by Permitting and Mitigation Programs Environmental Resource Potential for SCI Types of SCIs

Mitigation

Noise Levels

PI

Land use planning UDO - Airport overlay district - Open Space Preservation - Riparian Buffers Protection – development buffers - Tree Protection Parks and Recreation Master Plan Increase in grade separation projects for transportation UDO - Stormwater Programs - Sanitary Sewer Installation – stream crossings with directional borings - Water Conservation - Riparian Buffers and Floodplain Protection – no residential development or fill in floodplain Land Use Plans and open space preservation Parks and Recreation Master Plan Erosion and Sediment Control Program administered by Wake County Land use planning UDO - Open Space Preservation - Riparian Buffers and Floodplain Protection – allow for natural infiltration - Stormwater Programs, including promotion of LID - Water Conservation Programs corridors (reduce train whistle noises) NCDOT Traffic Noise Abatement Policy

Increase in overall noise level in Planning Area Negative impacts to human health

PI

Surface Water Resources

Water quality degradation; increase in stormwater runoff and sedimentation Alteration of natural hydrograph (e.g., magnitude, timing, frequency, duration, rate of change); lower and more frequent low-flow conditions; alteration of channel morphology

Possible reduction in groundwater inflow that provides baseflow in streams and supports aquatic life during droughts Reduction in use for private drinking water; potential to become contaminated

LI

Groundwater Resources

ES-8