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Grading plans and specifications shall be prepared and signed by a civil engineer, as provided herein.

A. The plans shall include everything required in SCC 12.08.270(A) and the following:

1. All plans shall be on 24-inch by 36-inch sheets unless otherwise approved, and shall be drawn at a scale no less than one inch equals 100 feet. An identical electronic copy of the plans shall also be furnished to the Planning Department in Adobe Acrobat format (PDF) or as otherwise approved, to facilitate routing and sharing of comments and requested revisions;

2. A title block. Plans shall be entitled “grading plan” and state the purpose of the proposed grading and the name of the engineer or firm by whom this plan is prepared, owner’s name and address, site address, date of preparation and draft or revision number;

3. A vicinity sketch (not at map scale) indicating the location of the site relative to the principal roads, lakes, watercourses and wet meadow areas in the vicinity;

4. North arrow and scale;

5. A site plan indicating the extent of the work and any proposed divisions of land;

6. The complete site boundaries (i.e., property lines) and locations of any existing utilities, easements and rights-of-way traversing or adjacent to the property which may potentially affect, or be affected by, the proposed project;

7. The location of all existing or proposed roads, culverts, buildings, wells, pipelines, tree-lines, wetlands, watercourses, septic systems or areas reserved for on-site sewage disposal, and any other structures, facilities, and features of the site, as well as the location of all improvements on lots within 150 feet of the proposed work;

8. Location and nature of known or suspected soil or geologic hazard areas, including but not limited to serpentine rock areas, landslides, etc.;

9. Accurate contour lines of the existing terrain and proposed finished grade at intervals not greater than two feet (unless otherwise approved by the county), showing all topographic features and drainage patterns throughout the area where the proposed grading is to occur relative to a benchmark established on site (to be shown on the plan). The contour lines shall be extended to a minimum of 150 feet beyond the affected area, and further, if needed, to define intercepted drainage, and shall be extended a minimum of 100 feet outside of any future road right-of-way;

10. Approximate location of cut-and-fill lines extent (top of slope and toe of slope), and finished slopes of all proposed grading, and the limits of grading for all proposed grading work, including borrow and stockpile areas;

11. Location, width, direction of flow and approximate location of any watercourses including tops and toes of banks;

12. Approximate boundaries of any special flood hazard area as depicted on the latest adopted Flood Insurance Rate Map or other known flood study, or any areas with histories of flooding based on local information;

13. Cross sections, profiles, elevations, dimensions, and construction details based on accurate field data as may be required after initial review of plans;

14. Construction details for roads, easements, watercourses, culverts, ditches, bridges and drainage devices, retaining walls, cribbing, dams, and other improvements existing or to be constructed, together with supporting calculations and maps as may be required after initial review of plans;

15. Proposed provisions for storm drainage control and any existing or proposed flood control facilities or septic tank disposal fields or areas reserved for on-site sewage disposal near the grading;

16. A detailed erosion and sediment control plan including specific locations, construction details, and supporting calculations for temporary and permanent sediment control structures and facilities. NOI and SWPPP references must be noted on the plan;

17. A revegetation plan, including temporary erosion control plantings, permanent slope plantings, replacement of temporary groundcover, and irrigation facilities.

B. Additional supporting information which may be required includes, but is not necessarily limited to:

1. The location of any borrow site or location for disposal of surplus material;

2. A projected schedule of operations, including, as a minimum, the dates of:

a. Commencement of work,

b. Start and finish of rough grading,

c. Completion of drainage facilities,

d. Completion of work in any watercourse,

e. Completion of erosion and sediment control facilities,

f. Completion of hydromulching and other landscaping. If rough grading is proposed between October 15th and May 1st, a more detailed schedule of grading activities and use of erosion and sediment control facilities may be required;

3. Itemized cost estimate of the proposed grading and related work;

4. A complete drainage study;

5. Geotechnical investigation report and recommendations addressing the proposed work;

6. Biological resources, sensitive habitat and potential wetlands studies;

7. Cultural resources assessment.