(a) Waivers for Providing Stormwater Management. Every applicant shall provide for stormwater management as required by this article, unless a written request is filed to waive this requirement. Requests to waive the storm water management plan requirements shall be submitted to the City of Dunbar for approval. The minimum requirements for stormwater management may be waived in whole or in part upon written request of the applicant, provided that at least one of the following conditions applies:
(1) It can be demonstrated that the proposed development is not likely to impair attainment of the objectives of this article.
(2) Alternative minimum requirements for on-site management of stormwater discharges have been established in a stormwater management plan that has been approved by the City of Dunbar and the implementation of the plan is required by local ordinance.
(3) Provisions are made to manage stormwater by an off-site facility. The off-site facility is required to be in place, to be designed and adequately sized to provide a level of stormwater control that is equal to or greater than that which would be afforded by on-site practices and there is a legally obligated entity responsible for long-term operation and maintenance of the storm water practice.
(4) The City of Dunbar finds that meeting the minimum on-site management requirements is not feasible due to the natural or existing physical characteristics of a site.
(5) Non-structural practices will be used on the site that reduce the generation of storm water from the site, the size and cost of storm water storage and the pollutants generated at the site. These non-structural practices are explained in detail in the current design manual and the amount of credit available for using such practices shall be determined by the City of Dunbar.
A. In instances where one of the conditions above applies, the City of Dunbar may grant a waiver from strict compliance with these stormwater management provisions, as long as acceptable mitigation measures are provided.
B. However, to be eligible for a variance, the applicant must demonstrate to the satisfaction of the City of Dunbar that the variance will not result in the following impacts to downstream waterways:
1. Deterioration of existing culverts, bridges, dams, and other structures;
2. Degradation of biological functions or habitat;
3. Accelerated streambank or streambed erosion or siltation;
4. Increased threat of flood damage to public health, life, property.
C. Furthermore, where compliance with minimum requirements for stormwater management is waived, the applicant will satisfy the minimum requirements by meeting one of the mitigation measures selected by the jurisdictional stormwater authority. Mitigation measures may include, but are not limited to, the following:
1. The purchase and donation of privately owned lands, or the grant of an easement to be dedicated for preservation and/or reforestation. These lands should be located adjacent to the stream corridor in order to provide permanent buffer areas to protect water quality and aquatic habitat.
2. The creation of a storm water management facility or other drainage improvements on previously developed properties, public or private, that currently lack stormwater management facilities designed and constructed in accordance with the purposes and standards of this article.
3. Monetary contributions (Fee-in-Lieu) to fund stormwater management activities such as research and studies (e.g., regional wetland delineation studies, stream monitoring studies for water quality and macroinvertebrates, stream flow monitoring, threatened and endangered species studies, hydrologic studies, and monitoring of stormwater management practices.
(b) Fee in Lieu of Stormwater Management Practices.
(1) Where the City of Dunbar waives all or part of the minimum stormwater management requirements, or where the waiver is based on the provision of adequate storm water facilities provided downstream of the proposed development, the applicant shall be required to pay a fee in an amount as determined by the City of Dunbar.
(2) When an applicant obtains a waiver of the required stormwater management, the monetary contribution required shall be in accordance with a fee schedule (unless the developer and the stormwater authority agree on a greater alternate contribution) established by the City of Dunbar and based on the cubic feet of storage required for storm water management of the development in question. All of the monetary contributions shall be credited to an appropriate capital improvements program project, and shall be made by the developer prior to the issuance of any building permit for the development.
(c) Dedication of Land. In lieu of a monetary contribution, an applicant may obtain a waiver of the required stormwater management by entering into an agreement with the City of Dunbar for the granting of an easement or the dedication of land by the applicant, to be used for the construction of an off-site stormwater management facility. The agreement shall be entered into by the applicant and the City of Dunbar prior to the recording of plats or, if no record plat is required, prior to the issuance of the building permit.
(Ord. 654. Passed 7-6-10.)