1717488Amend006dwg_CIVIL.pdf

This document is a set of construction plans and technical specifications for stormwater management facilities at a federal installation. The plans include detailed civil engineering drawings, site plans, cross-sections, and construction details for stormwater infrastructure including catch basins, outlet structures, sediment chambers, filter sand systems, and related appurtenances.

The specification package details construction requirements for multiple stormwater structures (numbered SD1 through SD49) with associated pipe connections and roof drain systems. Key construction elements include erosion and sediment control measures, temporary and permanent ground cover requirements, tree preservation protocols, and detailed maintenance procedures for all stormwater facilities. The plans specify materials standards, installation requirements for inlet protection devices, rock check dams, temporary sediment fences, dewatering operations, and ongoing inspection and maintenance protocols. Notable requirements include North Carolina seeding specifications for temporary and permanent vegetation, measures for handling construction sequencing to minimize environmental impact, and detailed specifications for catch basin modifications, flared end details with outlet stabilization, bioretention area outlet structures, and trash rack assemblies. The document also contains comprehensive notes on stormwater management facility operations, including provisions for sediment removal, clearout procedures, and long-term maintenance access requirements. Construction specifications address site preparation, material placement, compaction standards, and contractor responsibilities for temporary protection and erosion control during the project execution phase.