Surface water drainage plan

Engineering site plan for a Heritage Centre showing building layout, surrounding paths and landscaped areas, and the proposed drainage and surface-water management design. It marks manholes and inspection chambers with integral silt traps, soakaway/infiltration trenches, and infiltration boxes, with pipe runs and directions of flow. Levels, gradients, and spot heights are noted across the site along with tree and boundary features such as fencing. The plan includes specifications for construction, including a typical section for permeable gravel surfacing with material layers and thicknesses. The main purpose is to communicate how surface water will be collected, treated for silt, and discharged to the ground through infiltration, while coordinating the drainage works with the building footprint and external works.