10.32.060 Permits Required.
(1) Medium Projects are development that disturbs 5,000 square feet or more but less than one acre through clearing, grading, excavating, or stockpiling of fill material, including the cumulative acreage of the entire project whether in a single or in a multiphase project and/or has the potential to change natural drainage patterns. It is contemplated that most Medium Projects will only require ESC plans. If the site of a Medium Project has any of the conditions set forth in Section 10.32.060(3) below, a SWPPP may be required and the project will be subject to the requirements and restrictions of Large Projects. A Local SW Permit is required for Medium Projects. In order to obtain the Local SW Permit, Medium projects must submit an application along with an ESC Plan, as outlined in Section 10.32.090(2).
(2) Large Projects are development with land disturbing activities of one acre or more, or projects of less than one acre that are part of a common plan of development or sale of one acre or more. A Local SW Permit is required for Large Projects. In order to obtain the Local SW Permit, Large Projects must submit an application and demonstrate compliance with all Core Elements and treatment levels applicable to the project, as outlined in Section 10.32.090(3). Additionally, Large Projects must also determine whether they are subject to the requirements of Ecology’s NPDES Construction Stormwater General Permit.
(3) The City may require any land disturbing activity of any size to obtain a Local Stormwater Permit and be subject to developing an ESC Plan or SWPPP if any of the following conditions are met:
(a) The potential exists for a significant amount of sediment to migrate off-site;
(b) Slopes with concentrated surface water flow;
(c) Slopes greater than 2:1;
(d) Direct discharge to:
(i) South Fork Palouse River
(ii) Paradise Creek
(iii) Dry Fork Creek
(iv) Missouri Flat Creek;
(e) In other situations where slope stability could be in question, as determined by the Administrator,
(f) In cases where the project may negatively affect downstream or neighboring parcels;
(g) Connection to the City MS4, unless otherwise covered under a right of way disturbance permit. (Ord. 11-1 §7, 2011).