Unless otherwise exempt from compliance with the standards set forth in this chapter, all development to which this chapter is applicable shall comply with the following requirements and methods for stormwater management:
A. Contaminant Removals:
1. Stormwater expected contaminant removals shall be in accordance with State standards.
2. If the proposed development exceeds site limitations for on site infiltration methods, then an acceptable alternative stormwater collection, treatment and disposal system in accordance with an approved stormwater management plan shall be used. Said approved alternative on site stormwater collection and treatment systems may be proposed subject to specific approval by the City during the development review process.
B. Development: All development subject to this chapter shall be carried out such that the runoff of storm or other surface waters shall not be accelerated, concentrated, or otherwise conveyed beyond the exterior property lines or project boundaries of the project in question, except in compliance with the provisions of Best Management Practices (BMPs) adopted pursuant to this chapter or as allowed through joint management of stormwater with adjoining property owners pursuant to agreement approved by the City. The quality of surface runoff shall be protected by compliance with the design standards and BMPs adopted pursuant to this chapter.
C. Stormwater Management Plan Required: Each developer developing real property, unless exempted in this chapter shall develop a comprehensive stormwater management plan which addresses and complies with the requirements and standards established by this chapter and the plan criteria, design standards and BMPs adopted herein or by resolution pursuant to this chapter. Each plan for stormwater management shall be approved by a qualified, licensed professional, who shall submit both construction quality design drawings and supporting calculations for review by the City prior to start of construction. Each stormwater management plan shall also identify necessary maintenance requirements to be used in development of a stormwater maintenance plan.
D. Stormwater Maintenance Plan Required: Each developer who is required to or chooses to construct stormwater management systems in accordance with this chapter shall also establish, including assurance of adequate funding, the necessary maintenance system, including an acceptable plan for sustained functioning of the collection and treatment system, which shall become the ongoing responsibility of the property owner upon which the facility is located.
E. Continued Maintenance: When requested, the developer shall grant the necessary easements to the local government which may choose to provide continued maintenance of the system by public authorities or may require the owner to accomplish the same. The City is hereby authorized to establish a department of City government to perform maintenance service for stormwater management system components or to contract for such maintenance in order that drainage system components can be maintained. Such services shall be financed by charging fees to owners and/or occupants of real property benefited by such service.
F. Other Applicable Requirements: This chapter shall be applied in a manner consistent with the procedures set forth in the Zoning Ordinance, Subdivision Ordinance, Building Code Ordinance, and such other ordinances as the City may enact to regulate the use and development of land within the City pursuant to authority granted by Idaho Code title 65, chapter 67. For purposes of application of the design standards and other related documents and standards for the City, the City shall be designated as the permit authority. (Ord. 542, 1-27-2015; amd. Ord. 596, 5-24-2019)