2020-057-E Planning - Wellsmont Landscaping spillway mulching

Browse Search

DocuSign Envelope ID:AEB4824B-973E-408D-9C1C-5EDDD8B50786 Practice Standards and Specifications Native Seed and Plant Selection for Stabilization of Wetlands, Riparian Areas,and Floodplains pon the completion of the land disturbing activity, vegetative cover must be establ i shed on al I areas not stabi I i zed by other means. I f work i n these areas stops for more than 15 working days, temporary vegetative cover and/ or matting must be applied to all disturbed areas. The goal is to protect these areas f rom erosi on and to prevent sedi mentati on of adj acent streams,wed ands, lakes,and other water bodies. Planning considerations for wetlands, riparian areas and floodplains will require additional research, detail and specifications. Native grasses are usually required as a condition of a 401 Water Quality Certification or a trout buffer vari ance. N ati ve vegetati ve sped es are pl ant sped es that natural I y occur i n the regi on i n whi ch they evol ved. These pl ants are adapted to I oval soi I types and cl i mati c variations. ecause most nati ve sped es do not germi nate and establ i sh as readi I y as some introduced species, it is necessary to provide a non native nurse crop or matti ng to stabi I i ze the soi I unti I the nati ve crop can become established as the dominant cover. Once established, the native plants will produce an extensive root structure that,if properly maintained,will stabilize soils and reduce erosive forces of rainfall and overland stormwater flow. Many of these pl ants al so possess characteri sti cs that,when establ i shed,al I ow them not only to survive, but also to thrive under local conditions. Seeding a mixture of perennial native grasses, rushes, and sedges is a way to establish permanent ground cover within wetlands, riparian areas and floodplains. The use of propagated plants is another method of reestablishing natives in these environments. Selecting a seed mixture and/or propagated plants of different species with complimentary characteristics will provide vegetation to fill select niches on sites with varying physical conditions. The design professional should note that because most native species do not germinate and establish as readi I y as some introduced species, it is necessary to provide a non native nurse crop or matting to stabilize the Soil until the native crop can become establ i shed as the dominant cover. For additional information about acceptable nurse crop varieties, consult the pl anti ng I i st in Appendix 8.02,local seed and plant suppliers,the North Carolina Cooperative Extension Service or a qualified design professional to assure the proper selection and plant mix. Rev.5/08 6.11.