Grading permit submittal requirements

Each application for a grading permit shall also be accompanied by plans and specifications, including: A. A plot plan and grading plan showing the location of the grading limits, property lines, best management practices to prevent erosion and sedimentation to the maximum extent practicable, neighboring public ways, sufficient dimensions and other data, for example photographs, to show the location of all work; details and location of existing and proposed land drainage patterns, drainage structures, drainage pipes, and retaining walls; and any other information as may be required by the director to carry out the purposes of this chapter. B. Erosion control plan, and drainage plan and report. In the event the graded area is more than one acre or in the event a proposed cut or fill is greater than fifteen feet in height, an erosion control plan and a drainage plan and report shall be submitted with the plot plan. The erosion control plan and the drainage plan and report shall be prepared by an engineer. 1. Erosion control plan. The erosion control plan shall employ best management practices to the maximum extent practicable to prevent or reduce pollutants from water bodies, including sediment and other contaminants, in discharges from a construction site. The erosion control plan shall include drawings with notes and details on the BMPs to be implemented for the project, pursuant to section 20.08.035 , minimum BMPs. The erosion control plan shall address the following to the extent applicable: a. Stabilization of denuded areas; b. Protection/stabilization of soil stockpiles; c. Permanent soil stabilization; d. Establishment and maintenance of permanent vegetation; e. Protection of adjacent properties and water bodies; f. Sediment trapping measures; g. Sediment basins; h. Cut and fill slopes (terracing); i. Stormwater management; j. Sequence of construction operations, including phased and successive development projects; k. Stabilization of waterways and outlets; l. Storm sewer inlet protection; m. Control of access and vehicular movement; n. Vehicular control on residential lots during construction; o. Working in or crossing watercourses; p. Underground utility construction; q. Timely installation of permanent erosion and sediment control; r. Maintenance of erosion control facilities; s. Protection of existing vegetation; and t. Dust control. 2. Drainage plan and report. The drainage plan and report shall provide hydrologic and hydraulic calculations and information in accordance with title 15 , "rules for the design of storm drainage facilities in the County of Maui," and revisions thereof, and other standards approved by the department of public works. The potential effects of the water runoff from the entire area covered by the permit on lower lying housing, businesses and other developments, and on water bodies, shall be included in the drainage plan and report. C. Engineer's soils report. In the event a proposed cut or fill is greater than fifteen feet in height, or in the event any fill is in the water, including wetlands and streams, or in the event the fill material will be a highly plastic clay, the applicant shall submit an engineer's soils report, to include data regarding the nature, distribution, and engineering characteristics of existing soils, the subsurface conditions at the site or the presence of ground water when detected, and recommending the limits for the proposed grading, the fill material to be used and the manner of placing it, including the height and slopes of cut and fill sections. Terminology for describing soils in the engineer's soils report, insofar as practical, shall be based on the soil survey of islands of Kauai, Oahu, Maui, Molokai, and Lanai, State of Hawaii, or its revisions, issued by the soil conservation service in connection with the university of Hawaii agriculture experiment station. D. Engineering slope hazard report. If the proposed construction includes grading affecting an existing slope with a height greater than fifteen feet and with a grade steeper than 35 percent (10H:3.5V) where such grading is located above and may adversely impact residential or other developed areas as determined by the director, the applicant shall submit an engineering slope hazard report. The report shall, at a minimum, include an evaluation of hazards posed by potential surface and subsurface ground movement to the proposed development, and an evaluation of the hazard posed to adjacent properties or existing buildings by the proposed construction. The engineering slope hazard report and construction plans shall include mitigative measures to minimize the hazards posed by potential surface and subsurface ground movement and the threat that the development poses to properties adjacent to the proposed construction. The engineering slope hazard report shall also include a plan for re-vegetation of all disturbed and exposed slopes. The director may require additional mitigative measures as conditions of the permit. E. Responsibility. The permittee and the property owner shall be responsible for construction, installation, and maintenance of structural and nonstructural BMPs at construction sites in accordance with the approved erosion control and drainage plans. The adequacy of BMPs employed, the implementation of corrective action, if needed, and the cost thereof, shall be the responsibility of the permittee and the property owner. (Ord. No. 3895, § 3, 2011; Ord. 2684 § 8, 1998: Ord. 816 § 1 (part), 1975: prior code § 24-2.2(b))