19.06.200 Mitigation Plan Submittal Requirements:
Following submittal of any proposed alterations to wetland and buffer areas, the applicant shall submit to the department a wetland mitigation plan substantially in the following form:
A. Conceptual Phase. A conceptual compensatory mitigation plan shall be submitted to the department. In cases in which environmental review is required, a threshold determination may not be made prior to department review of the conceptual mitigation plan. The conceptual mitigation plan shall include:
1. General goals of the compensatory mitigation plan, including an overall goal of no net loss of wetland function and acreage, and to strive for a net resource gain in wetlands over present conditions
2. Approximate site topography following construction
3. Location of proposed wetland compensation area
4. General hydrologic patterns on the site following construction
5. Nature of compensation, including wetland types (in-kind and out-of-kind), general plant selection and justification, approximate project sequencing and schedule, and approximate size of the new wetland buffer
6. A conceptual maintenance plan
B. Detailed Phase. Following approval of the conceptual mitigation plan by the department, a detailed mitigation plan shall be submitted to the department. The detailed plan shall contain, at a minimum, the following components:
1. Text and map of the existing condition of the proposed compensation area, including:
a. Existing vegetation community analysis
b. Hydrological analysis, including topography, of existing surface and significant sub-surface flows into and out of the area in question
c. Soils analysis providing both Soil Conservation Service mapping and data provided by on-site verified determinations
d. Detailed description of flora and fauna existing on the site
e. Description of existing site conditions in relation to historic conditions for those sites which have been recently altered or degraded
2. Text and map of the proposed alterations to the compensation area, including:
a. Relationship of the project to the watershed and existing water bodies
b. Topography of site using one foot contour intervals
c. Water level data, including depth and duration of seasonally highwater table
d. Water flow patterns
e. Grading, filling and excavation, including a description of imported soils
f. Irrigation requirements, if any
g. Water pollution mitigation measures during construction
h. Aerial coverage of planted areas to open water areas (if any open water is to be present)
i. Appropriate buffers
The compensation plan shall include detailed site diagrams, topographic maps showing slope percentage and final grade elevations, and any other drawings appropriate to show construction techniques or anticipated final outcome. The plan shall provide for elevations which are appropriate for the desired habitat type(s) and which provide sufficient tidal prism and circulation data.
3. A schedule shall be provided showing dates for beginning and completing the mitigation project, including a sequence of construction activities.
C. Approval of the detailed mitigation plan shall be signified by a notarized memorandum of agreement signed by the applicant and Director of the department, and recorded with the Grant County Auditor. The agreement shall refer to all mitigation requirements for the project.
D. Approval of the detailed mitigation plan shall occur prior to the issuance of building permits or other development permits. No development activity shall occur on the site prior to approval. Required mitigation may also be required prior to issuance of permits or prior to commencing development activity. Timing of required mitigation shall be determined on a case by case basis. (Ord. 2134, 11/11/03; Ord. 1587, 1993)