(A) Grading, erosion control practices, sediment control practices and waterway crossings shall be adequate to prevent transportation of sediment from the site to the satisfaction of the city’s Water Service. Cut and fill slopes shall be no greater than 2:1, except as approved by the city’s Water Service to meet other community or environmental objectives.
(B) Clearing and grading of natural resources, such as forests and wetlands, shall not be permitted, except when in compliance with all other chapters of this code. Clearing techniques that retain natural vegetation and drainage patterns and shall be used to the satisfaction of the city’s Water Service.
(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 30 acres, with the size of each phase to be established at plan review and as approved by the city’s Water Service.
(E) Erosion control requirements shall include the following.
(1) Soil stabilization shall be completed within five days of clearing or inactivity in construction.
(2) If seeding or another vegetative erosion control method is used, it shall become established within two weeks or the city’s Water Service may require the site to be reseeded or a non-vegetative option employed.
(3) Special techniques approved by the city’s Water Service on steep slopes or in drainage ways shall be used to ensure stabilization.
(4) Soil stockpiles must be stabilized using approved BMP techniques or covered at the end of each workday.
(5) The entire site must be stabilized, using a heavy mulch layer or another method that does not require germination to control erosion, at the close of the construction.
(6) Techniques approved by the city’s Water Service shall be employed to prevent the blowing of dust or sediment from the site.
(7) Techniques approved by the city’s Water Service that divert upland runoff past disturbed slopes shall be employed.
(F) (1) Sediment controls requirements shall include, but are not limited to:
(a) Settling basins, sediment traps or tanks and perimeter controls;
(b) Settling basins that are designed in a manner that allows adaptation to provide long-term storm water management, if required by the city’s Water Service; and
(c) Protection for adjacent properties by the use of a vegetated buffer strip in combination with perimeter controls.
(2) All sediment control techniques shall be approved by the city’s Water Service.
(G) (1) Waterway and watercourse protection requirements shall include, but are not limited to, a temporary stream crossing installed and approved by the city’s Water Service if a wet watercourse will be crossed regularly during construction:
(a) Stabilization of the watercourse channel before, during and after any in-channel work;
(b) All on-site storm water conveyance channels shall be designed as approved by the city’s Water Service; and
(c) Stabilization adequate to prevent erosion located at the outlets of all pipes and paved channels.
(2) All waterway and watercourse protection requirements shall be approved by the city’s Water Service.
(H) (1) Construction site access requirements shall include, but are not limited to:
(a) A temporary access road provided at all sites; and
(b) Other measures required by the city’s Water Service in order to ensure that sediment is not tracked onto public streets by construction vehicles or washed into storm drain.
(2) All construction site access requirements shall be approved by the city’s Water Service.
(Ord. passed 7-26-2010)