Colfax Municipal Code Art. V Plans and Specifications

Two or more complete sets of plans, as determined by the city engineer, including but not limited to profiles, cross-sections, topographic maps and specifications shall be submitted to the city engineer with each application for a grading permit, or when otherwise required by the city engineer for enforcement of any provision of this chapter. At the time of applications, the applicant may provide preliminary grading plans. Prior to the issuance of a grading permit the applicant much furnish final grading plans. Preliminary grading plans with appropriate changes and additions thereto may be accepted as final grading plans. When the final grading plans and other required documents have been approved, a grading permit will be issued by the city engineer. The work shall be done in strict compliance with the approved plans and specifications which shall not be changed or altered except in accordance with the provisions of this article.

(Ord. 483 (Exh. A) (part), 2005)

Preliminary grading plans provide for review and determination of grading permit requirements prior to approval of final plans and issuance of a grading permit. Precise design at this stage is not required. The plans shall be clearly and legibly drawn and entitled "Preliminary Grading Plan", and shall contain a statement of the purpose of the proposed grading, and shall include all of the following:

On a map of appropriate scale, but not smaller than 1″ = 100′:

(a) A plan entitled "Preliminary Grading Plan" and the name and signature of preparer and date of preparation.

(b) A vicinity sketch (not at map scale) indicating the location of the site relative to the principal roads, lakes and watercourses in the area.

(c) A site plan indicating the site of the work and any proposed divisions of land.

(d) The complete site boundaries and locations of any easements and rights-of-way traversing and adjacent to the property, appropriately labeled and dimensioned.

(e) The location and all existing and proposed roads, buildings, wells, pipelines, watercourses, septic systems or areas reserved for on-site sewage disposal, and other structures, facilities, and features of the site, and the location of all improvements of adjacent land within fifty (50) feet of the proposed work.

(f) Location and nature of known or suspected soil or geologic hazard areas.

(g) Contour lines of the existing terrain and proposed approximate finished grade at intervals not greater than five feet, showing all topographic features and drainage patterns throughout the area where proposed grading is to occur. The contour lines shall be extended to a minimum of fifty (50) feet beyond the affected area, and further if needed to define intercepted drainage, and shall be extended a minimum of one hundred (100) feet outside of any future road rights-of-way.

(h) Approximate location of cut and fill lines and the limits of grading for all the proposed grading work, including borrow and stockpile areas.

(i) Location, width, direction of flow and approximate location of tops and toes of banks of any watercourses.

(j) Approximate boundaries of any areas with a history of flooding.

(k) 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 in the vicinity of the grading.

(l) A conceptual plan for erosion and sediment control including both temporary facilities and long-term site stabilization features such as planting or seeding for the area affected by the proposed grading.

(m) North arrow and scale.

(n) General location and character of vegetation covering the site.

(o) Typical cross section (not less than two) of all existing and proposed graded areas taken at intervals not exceeding two hundred (200) feet and at locations of maximum cuts and fills.

(p) An estimate of the quantities of excavation and fill, including quantities to be moved both on and off site.

(q) The estimated starting and completion dates of grading.

(Ord. 483 (Exh. A) (part), 2005)

Final grading plans and specifications shall be prepared and signed by a civil engineer, except as otherwise provided herein, on sheets twenty-four inches by thirty-six inches (24″ x 36″). The plans shall include the following, in addition to all requirements for preliminary grading plans:

(a) 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;

(b) Accurate contour lines at intervals not greater than five feet, showing topographic features and drainage patterns and the configuration of the ground before and after grading, relative to a bench mark established on site;

(c) Location, extent and finished surface slopes of all proposed grading and final cut and fill lines;

(d) Cross-sections, profiles, elevations, dimensions and construction details based on accurate field data;

(e) Construction details for roads, watercourses, culverts, bridges and drainage devices, retaining walls, cribbing, dams, and other improvements existing or to be constructed, together with supporting calculations and maps as required;

(f) Complete construction specifications, including progress schedule of work;

(g) A detailed erosion and sediment control plan including specific locations, construction details, and supporting calculations for temporary and permanent sediment control structures and facilities;

(h) A revegetation plan including temporary erosion control plantings, permanent slope plantings, replacement of temporary ground cover, and irrigation facilities;

(i) An estimate of the quantities of excavation and fill;

(j) The location of any borrow site or location for disposal of surplus material;

(k) A projected schedule of operations including, as a minimum, the date of:

(1) Commencement of work;

(2) Start and finish of rough grading;

(3) Completion of drainage facilities;

(4) Completion of work in any watercourse;

(5) Completion of erosion and sediment control facilities;

(6) Completion of hydromulching and other landscaping prior to October 15th. 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;

(7) Itemized cost estimate of the proposed grading and related work;

(8) A complete drainage study, geotechnical report, and structural calculations may be required.

(Ord. 483 (Exh. A) (part), 2005)

All plans and specifications shall be prepared and signed by a civil engineer except that the city engineer may waive this requirement if the grading would not endanger the public health, safety or welfare as determined by the city engineer; and would not involve or require any of the following:

(a) Cuts and fills with a combined total of one thousand (1,000) cubic yards or more;

(b) An access road serving five or more existing or potential residences;

(c) A cut or fill that is intended to support structures;

(d) A cut or fill that is located so as to cause unduly increased pressure or reduce support upon adjacent structure or property;

(e) The construction of any extensive drainage or sediment control structures, culverts, or facilities or substantial alteration of any existing drainage course;

(f) The creation or aggravation of an unstable slope condition.

(Ord. 483 (Exh. A) (part), 2005)

(a) Proposed modifications of an approved final plan shall be submitted to the city engineer for his written approval prior to commencing with the modification work.

(b) All necessary soils and geological information and design details shall accompany any proposed modification.

(c) The modification shall be compatible with any zoning, subdivision map or land use requirements.

(Ord. 483 (Exh. A) (part), 2005)

Implementation of erosion and sediment control plans shall be based on the season of the year and the stage of construction at forecasted periods of rainfall and heavy storms. Erosion and sediment control plans shall allow for possible changes in construction scheduling, unanticipated field conditions, and relatively minor changes in grading. Modifications to plans may be required after initial plan approval.

(Ord. 483 (Exh. A) (part), 2005)

Two sets of approved plans and specifications shall be retained by the city engineer and one or more sets of approved and dated plans and specifications shall be provided to the applicant or his engineer. One set of approved plans and permit shall be retained on the site at all times during the work.

(Ord. 483 (Exh. A) (part), 2005)