(A) The plan for any permitted land disturbance operation shall be designed using sound engineering practice and shall met the minimum criteria set forth in the most recent version of the city’s subdivision regulations, Storm Water Manual and other city storm water design guidelines. The plan, when implemented, shall be sufficient to control erosion and prevent sediment from leaving the site. Cut and fill slopes shall be no greater than three to one (3:1), except as approved by the city to meet other community or environmental objectives.
(B) Clearing and grading of natural resources, such as forests and wetlands, and other natural features of concern shall not be permitted, except when in compliance with all section this chapter as well as any regional, state and federal regulation. Clearing techniques that retain natural vegetation, drainage patterns, and buffers along streams as described by the city’s Storm Water Manual, shall be used where possible.
(C) Clearing, except that necessary to establish sediment control devices, shall not begin until all sediment control devices have been installed and have been stabilized.
(D) Phasing shall be required on all sites disturbing greater than 50 acres, with the size of each phase to be established at plan review and approved by the city.
(E) Erosion prevention BMP requirements.
(1) Soil stabilization shall be completed within 14 days of final grade work. If an area is left inactive for 21 days or more the area shall have temporary stabilization.
(2) If seeding or other vegetative erosion prevention methods are used, vegetation shall become established within three weeks. If a satisfactory stand of vegetation is not established, the site shall be reseeded or an approved non-vegetative employed.
(3) Special techniques such as rip rap, turf reinforcement, armoring and other stabilization methods that meet the design criteria outlined in the city’s Storm Water Manual shall be used on steep slopes or in drainage ways to ensure stabilization.
(4) Soil stockpiles must be stabilized or covered and have sediment control measures in place to control sediment movement. Stockpiles left for 21 days or more shall have temporary stabilization or vegetation established.
(5) When no construction is planned during the winter months, the entire site shall be stabilized at the close of the construction season. A heavy mulch layer or other approved stabilization method that does not rely on seed germination, shall be placed to control sediment and prevent erosion.
(6) Minimize clearing and grading to the smallest possible area. Preserve existing vegetation and trees to the maximum extent possible.
(7) Areas to be left undisturbed by the proposed construction shall be clearly noted and delineated on the plans and protected with temporary fencing, or other approved barrier, on the site.
(8) Vegetative buffer strips in combination with other perimeter controls shall be used for the protection of adjacent properties, watercourses and rights-of-way.
(9) Measures shall be implemented to control sedimentation deposits into drainage structures and features, receiving water bodies, streets, street rights-of-way, adjacent properties and natural karst features.
(10) In no case shall the placement of temporary or final seeding exceed 120 days after the original disturbance.
(F) Sediment control BMP requirements.
(1) Dust control techniques shall be employed to prevent the blowing of dust by air movements during land disturbance, demolition and other construction activities.
(2) Diversion of upland runoff past disturbed slopes shall be implemented when effective.
(3) Settling basins, sediment traps, tanks and/or perimeter controls shall be implemented as required to control sediment, consistent with the city’s Storm Water Manual.
(4) Effective debris and trash management shall be required.
(G) Waterway, watercourse, ephemeral stream and public storm and public storm drain protection requirements shall include the following:
(1) When a watercourse will be crossed regularly during construction, install a temporary stream crossing as approved by the state’s Division of Water and/or the city;
(2) Stabilization of the watercourse channel before, during and after any in-channel work;
(3) Design of all on-site storm water conveyance channels in accordance with criteria outlines in the city’s Storm Water Manual, the subdivision regulations, other city storm water design guidelines, and sound engineering practice; and
(4) Stabilization adequate to prevent erosion at the inlets and outlets of all pipes and paved channels.
(H) Construction site access requirements designed to minimize the deposit of sediment or other materials on public streets and rights-of-way shall include:
(1) Continuous access via a stabilized rock entrance, constructed in accordance with the city’s Storm Water Manual; and
(2) A tire wash rack shall be required by the city as necessitated by site traffic.
(Prior Code, § 157.06) (Ord. 01-2007, passed 3-5-2007)