Grading and Erosion Control Plan Requirements. A Site Grading and Erosion Control Plan shall be submitted for review and approval for all sites (see Appendix A DEQ 1200-C Permit) prior to issuance of the City’s construction plan approval. It shall be prepared by an engineer licensed in Oregon and qualified to perform the work submitted within the plan. Geotechnical engineering reports, surveys, and other specialized work shall be performed (and stamped or otherwise certified) by professionals licensed/certified to perform such work. The applicant shall include construction documents (refer to 3-4) showing the following: ▪ Property lines, existing buildings or structures, easements, utilities, and drainage courses, existing trees (six inches in diameter and larger) and the location of any building or structure within 500 feet of the property boundary (location may be approximate); ▪ Contours (2-foot interval maximum) with existing elevations to show existing topography (Contour lines shall extend a minimum of 500 feet beyond the limits of the site. Contour lines outside the site boundaries may be approximate). Contours and elevations shall be used on NAD 83 or a County approved benchmark or temporary benchmark if the work will construct dedicated infrastructure. ▪ Elevations, dimensions, locations, extent, and the slopes of all proposed grading shown by contours and/or other means (label slopes 4:1 and steeper); ▪ Locations of retaining walls and other structures to be constructed as part of project (label wall height); ▪ Identify areas where engineered fill is required. ▪ Provide amount of excavation and fill (cubic yards) to neat line, top and toe of cut and fill slopes, direction of sheet and concentrated drainage. ▪ Locations of existing and proposed stormwater conveyance/detention facilities including inlets immediately downstream of site (for the purpose of evaluating drainage patterns during and after construction); ▪ Location of gravel construction entrance. ▪ Limits of clearing. ▪ Location for storage of excavated materials, wastes, and other construction materials. ▪ Placement of other erosion control devices including installation details and maintenance criteria (Incorporate these into the plans and specifications and reference City of Madras Stormwater Master Plan, ODOT Hydraulics Manual, and Central Oregon Stormwater Manual); ▪ Proposed types of permanent cover to be established on disturbed areas of site (e.g. lawn, native vegetation, rock/xxxxx work, gravel, asphalt, etc.) and conditions...
