(A) At a minimum, regular inspections shall be made and documented at the following stages of construction:
(1) Ponds.
(a) Upon completion of excavation to subfoundation and, when required, installation of structural supports or reinforcement for structures, including but not limited to:
1. Core trenches for structural embankments;
2. Inlet and outlet structures, anti-seep collars or diaphragms, and watertight connectors on pipes; and
3. Trenches for enclosed storm drainage facilities.
(b) During placement of structural fill, concrete, and installation of piping and catch basins;
(c) During backfill of foundations and trenches;
(d) During embankment construction; and
(e) Upon completion of final grading and establishment of permanent stabilization.
(2) Wetlands.
(a) At the stages specified for pond construction in division (A)(1) above;
(b) During and after wetland reservoir area planting; and
(c) Twelve months after reservoir area planting to verify a vegetation survival rate of at least 75%.
(3) Infiltration trenches.
(a) During excavation to subgrade;
(b) During placement and backfill of underdrain systems and observation wells;
(c) During placement of geotextiles and all filter media;
(d) During construction of appurtenant conveyance systems such as diversion structures, prefilters and filters, inlets, outlets, and flow distribution structures; and
(e) Upon completion of final grading and establishment of permanent stabilization.
(4) Infiltration basins.
(a) At the stages specified for pond construction in division (A)(1) above; and
(b) During placement and backfill of underdrain systems.
(5) Filtering systems.
(a) During excavation to subgrade;
(b) During placement and backfill of underdrain systems;
(c) During placement of geotextiles and all filter media;
(d) During construction of appurtenant conveyance systems such as flow diversion structures, prefilters and filters, inlets, outlets, orifices, and flow distribution structures; and
(e) Upon completion of final grading and establishment of permanent stabilization.
(6) Open channel systems.
(a) During excavation to subgrade;
(b) During placement and backfill of underdrain systems for dry swales;
(c) During installation of diaphragms, check dams, or weirs; and
(d) Upon completion of final grading and establishment of permanent stabilization.
(7) Non-structural practices.
(a) Upon completion of final grading; and
(b) The establishment of permanent stabilization.
(B) Once construction is complete, an as-built plan certification shall be submitted by a professional engineer or professional land surveyor as appropriate to ensure that ESD planning techniques, nonstructural and structural SWM practices and conveyance systems comply with the specifications contained in the approved plans. The as-built plan shall be submitted within 60 days of completion of construction. At a minimum, as-built plan certification shall include a set of drawings comparing the approved SWM plan with the completed construction. Both the as-built block and inspection chart shall be completed, signed, and certified on the as-built. The county may require additional information.
(C) The county shall submit notice of construction completion to the Administration on a form supplied by the Administration for each structural SWM practice. The type, number, total drainage area, and total impervious area treated by all ESD techniques and practices shall be reported to the Administration on a site-by-site basis. If BMPs requiring SCD approval are constructed, notice of construction completion shall also be submitted to the appropriate SCD.
(2004 Code, § 191-22) (Ord. 01-12, passed 9-27-2001; Ord. 04-07, passed 4-1-2004; Ord. 2010-05, passed 4-29-2010)