(a) All plans submitted shall be on 24 by 36 inch white prints having black lines and shall be neatly and accurately prepared. Judgment should be exercised in the design, layout and presentation of proposed improvements. All plan submittals shall include two hardcopies of completed plans and specifications, and an itemized engineer's estimate of cost. Electronic versions of plans and details with an itemized engineer’s estimate of cost must also be submitted to the Township Engineer. Five sets of hardcopies and a final digital set of plans with required standard details need to be submitted at time of final approval.
(b) Engineering plans shall have a scale of no more than one inch equals 50 feet horizontal per sheet. Profile views shall have a scale of one inch equals 50 feet horizontal and one inch equals five feet vertical.
(c) Any land development project requiring more than one sheet of plans must be submitted with a general plan having a scale of one inch equals 100 feet (or larger scale) showing the overall project layout (including building locations) and indicating the location of all site improvements proposed.
(d) Street names, lot or property lines, right-of-way (ROW) lines and widths, and property identification numbers shall be shown on all plans.
(e) Sewers in easements shall be located at least two feet away from parcel or lot boundary lines. All public utility easements shall abut a property line, where applicable, to avoid any gaps that would inhibit future off-site connections to the public water or sewer utility. Any gaps will be identified by the Township Engineer and will need to be eliminated prior to recordation of the easement(s).
(f) Superimposed on a general plan of the site shall be contour lines of the project area, including the area at least 100 feet outside of the project area. Contour lines shall be shown at intervals as follows:
(1) Where the general slope of the land is 1% or less, the interval shall be one foot.
(2) Where the general slope of the land is more than 1%, but less than 5%, the interval shall be two feet.
(3) Where the general slope of the land is 5% or greater, the interval shall be five feet.
(g) Any underground or overhead public utilities located in new road rights of way shall be located according to the following schedule, measured in feet right (R) or left (L) from the centerline of the pavement. Easements shall be provided, if necessary, adjacent to the road right of way:
Standard Utility Locations | |||||
ROW Width (ft.) | Sanitary Sewer | Storm Sewer | Gas Main | Water Main | FOC or DE |
60 | 32 L | 22 L | 17 L | 21 R | 32 R |
70 | 32 L | 26 L | 21 L | 27 R | 32 R |
86 | 36 L | 26 L | 21 L | 27 R | 36 R |
120 | 52 L,R | 46 L | 46 L | 43 R | 59 1/2 L, R |
(h) All storm sewers, sanitary sewers and water mains shall be indicated in profiles. There shall be a separate profile view for each utility. However, it shall be the responsibility of the design engineer to ascertain that the depth of the storm sewer (or storm drain) does not interfere with the building service sewers crossing the storm sewer. Profiles shall indicate the size of pipe, class of pipe, slope of the utility, invert elevations, and control elevations of the utility. The existing and proposed grade lines shall be shown along the profile view of each utility.
(i) Elevations shall be based on North American Vertical Datum 88 (NAVD88). The Township bench marks shall be used where available, and at least two bench marks shall be listed and indicated on the plans for each project site area.
(j) Finish grade elevations planned for each structure shall be indicated on either the plan view or the profile view.
(k) A copy of the site boundary survey, with computed control lines indicated, or a copy of the computed plat, if applicable, shall be submitted with the engineering plans.
(l) Plans shall have all lettering a minimum height of one-tenth of an inch and be of such quality as to provide for a clear and legible recording.
(m) All plans submitted shall bear the seal of the registered Michigan professional engineer responsible for the design.
(n) The plans covering all of the required site improvements for a specifically designated area of the developer's land shall be submitted as one package before any plan review shall commence.
(o) The plans must show all existing wetlands and floodplain boundaries. Improvements within or near these boundaries will require additional local, State or Federal approvals, dependent on the impact to those natural features.
(Ord. 281. Passed 10-2-89; Ord. 481. Passed 10-24-22.)