(1)
The plan shall be based on applicable portions of the latest edition of the Washington State Department of Ecology Wetland Mitigation in Washington State, Part 2: Developing Mitigation Plans (Ecology Publication No. 06-06-011b), as amended, or equivalent.
(2)
The plan shall contain sufficient information to demonstrate that the proposed activities are logistically feasible, constructible, ecologically sustainable, and likely to succeed. Specific information to be provided in the plan shall include:
(a)
Basic Requirements. The plan shall include the name and contact information of the applicant; the name, qualifications, and contact information of the primary author(s); a description of the proposal; a summary of the impacts and proposed compensation concept; identification of all required local, state, and/or federal wetland-related permit(s); and a vicinity map for the project.
(b)
Project Description. A project description that includes:
(i)
Existing Conditions. An explanation of the existing wetland and buffer areas proposed to be altered including acreage (or square footage), water regime, vegetation, soils, landscape position, surrounding land uses, and functions.
(ii)
Plan Goals. Overall goals for the plan, including future wetland function, value, and acreage.
(iii)
Mitigation Sequencing. A description of how the project has been designed to avoid, minimize, rectify, reduce, or compensate adverse impacts to wetlands.
(iv)
Type and Location of Mitigation Activities. A narrative that describes the nature of mitigation activities including:
(A)
Site Treatment. A description of measures that are proposed to protect existing wetlands and desirable vegetation on the site including planting, invasive species removal, use of mulch and fertilizer, placement of erosion and sediment control devices, and other best management practices.
(B)
Hydrology. An analysis of existing and proposed hydrologic regimes for enhanced, created, or restored compensatory mitigation areas. The narrative shall include illustrations of how data for existing hydrologic conditions were used to determine the estimates of future hydrologic conditions.
(C)
Buffers. A description of the appropriateness of the buffer widths to protect the wetland functions into perpetuity.
(D)
Impacts to Ecological Functions. A description of the ecological functions and values that the proposed alteration will affect and the specific ecological functions and values that the proposed mitigation area(s) will provide, together with a description of the required or recommended mitigation ratios and an assessment of factors that may affect the success of the mitigation program.
(E)
Expected Future Conditions. Conditions expected from the proposed actions on site, including future hydrogeomorphic types, vegetation community types by dominant species (wetland and upland), and future water regimes.
(F)
Performance Standards. Specific measurable performance standards that the proposed mitigation action(s) will achieve together with a description of how the mitigation action(s) will be evaluated and monitored to determine if the performance standards are being met; and an identification of potential courses of action, and any corrective measures to be taken if monitoring or evaluation indicates that project performance standards are not being met. The performance standards shall be tied to and directly related to the mitigation goals and objectives.
(G)
Cost estimates for the installation of the mitigation program, monitoring, and potential corrective actions if project performance standards are not being met.
(v)
Scaled Drawings for the Project. Scaled drawings of the activities proposed including, but not limited to:
(A)
The location of the wetland and buffer.
(B)
Extent of clearing, grading, excavation, and construction impacts.
(C)
Existing hydrological features and proposed alterations.
(D)
Proposed planting, invasive plant management, installation of habitat structures, irrigation, and other site treatments associated with the development and proposed mitigation action(s).
(E)
Existing topography, ground-proofed, at two-foot contour intervals in the area of the proposed compensation actions, if any grading activity is proposed. Also existing cross-sections (estimated one-foot intervals) of wetland areas on the development site that are proposed to be altered, or used as wetland or buffer compensation sites.
(Ord. 1284 § 4, 2018; Ord. 1370 (Exh. B), 2025)