1748122Amend0006dwg_CIVIL.pdf

This is a set of construction design documents and specifications for stormwater management facilities, including site plans, cross-sections, and detailed construction notes. The documents appear to be for a federal project involving erosion and sediment control, stormwater management structures, and environmental site improvements at what is identified as a marine or military installation based on references to gate access and controlled areas.

The design specifications detail the construction of multiple stormwater management components including sediment chambers, bioretention areas, sand filters, rock check dams, outlet structures, and related drainage infrastructure. Key construction requirements include temporary sediment fencing, erosion control measures, tree preservation and protection protocols, topsoil stockpiling procedures, temporary construction entrances, and rock pipe inlet protection details. The documents specify maintenance procedures for various structures such as weekly inspection of sediment fences, monthly inspections of sand filters and outlet structures, and post-construction stabilization requirements. Multiple storm structure data tables provide detailed dimensions, invert elevations, and outfall specifications for dozens of numbered structures throughout the site. The specifications also address North Carolina seeding requirements for permanent and temporary ground cover, with specific instructions for application rates, timing, and soil amendments. The design includes provisions for contractor vehicle access, equipment staging areas, and work hour restrictions (0600-1800 hours) to manage site operations and environmental impacts during construction.