(A) Monuments; survey monuments. All subdivision boundary corners, block corners, street intersection corners, and points of tangency and curvature shall be marked with survey monuments consisting of galvanized pipes with caps minimum one-inch deformed steel rods 36 inches in length. Lot corners shall be marked with survey monuments consisting of iron pipes, iron rods, or other metal markers. All United States, state, county, and other official bench marks, monuments, or triangulation stations in or adjacent to the property shall be preserved in precise position.
(B) Streets.
(1) Street grading. Streets shall be graded in accordance with a plan approved by the Public Works Director. The grading shall include the full street width of the right-of-way and shall provide a boulevard section, in addition to the minimum pavement width.
(2) Street pavement. The design of street pavement for all streets covered by this regulation shall be in accordance with Standard Specifications for Highway Construction, M.H.D. and the State Highway Department Road Design Manual No. 5-291 for flexible pavements. The designed thickness of the surfacing elements shall be in accordance with the flexible pavement design standard for road classifications as follows.
Classification | Pavement Design Axle Load |
Minor streets and marginal access streets | 7-ton minimum |
Thoroughfare collector streets and commercial or industrial service streets | 9-ton minimum |
(3) Gravel surface. Streets that at the present time will only have a gravel surface shall be designed so the base and sub-base requirements as set forth in the Standards for Highway Construction, M.H.D. and the State Highway Department Road Design Manual No. 5-291 for flexible pavements are met. In all cases at least the top six inches of the street surface shall be of Class 5 gravel or a material as approved by the Public Works Director.
(4) Curb and gutter. Concrete curb and gutter shall be in accordance with Standard Specifications for Highway Design No. 8618, or M.H.D. Design No. S-518.
(5) Sidewalks and pedestrian ways. All required walks shall be concrete four inches thick placed on a four inch gravel base. Grades shall be as approved by the Public Works Director. Sidewalks shall be placed in the public right-of-way with a minimum six feet width.
(C) Public utilities.
(1) Water main. A minimum water main of six-inch c900 pipe or other approved pipe shall be required. Mains over six inches in size may be required.
(2) Sanitary sewer. Unless otherwise required, a sanitary sewer of eight-inch pipe, ASTM Schedule 30.34 MDOT Regulation, shall be installed as the minimum size placed at grades approved by the Public Works Director. Mains over eight inches in size may be required. Service wyes shall be four inches.
(3) House services. Each house service shall be run from the main to the property line where a cap or plug shall be placed until the service is extended to the structure. A one-inch Type K copper water service, corporation cock, curb box and stop, and four-inch pipe, ASTM Schedule 30.34 MDOT Regulation, sewer service shall be the minimum requirements and may be placed in a common trench.
(D) Sanitation.
(1) Where lots cannot be connected with a public sewerage system, provisions must be made for sanitary sewerage facilities, consisting of individual disposal devices for each lot. This does not mean that the installation of individual disposal devices shall be at the expense of the subdivider.
(2) Any subdivision or lot not provided with off-site sewer facilities may be subject to soil and percolation tests being made to determine whether or not the lot size proposed will meet minimum standards of health and sanitation requested by the Planning Commission due to limitation of soils as shown on existing soils maps. The lot area and topography must be such that it will accommodate an adequate disposal system or systems to serve the residence for the estimated unsewered years as determined by the Council. Such tests shall be made at the expense of the subdivider, and a sketch map shall be submitted to identify the specific locations where tests were made.
(3) All proposed sewage disposal systems shall comply with the regulations and recommended standards of the State Department of Health, the State Pollution Control Agency, and the city.
(E) House plumbing. When an individual sewage system is used and the septic tank is placed on a side other than that from which the public sewer line would connect, it shall be required that a capped sewage disposal line shall be extended from the point of ground entrance of basement or house to a point three feet beyond and to the side from which the future sewer connection will be made. Inside the basement the elbow shall be set up to be easily reversed for connection to the capped line.
(F) Drainage. All surface and underground drainage systems shall be installed to adequately remove all natural drainage that accumulates on the developed property. All such systems shall be in conformity to the city drainage plans and all piping shall provide complete removal and a permanent solution for the removal of drainage water.
(G) Boulevard trees. Tree varieties shall comply with “boulevards tree policy”.
(H) Utilities location. Every lot in a subdivision shall be capable of being served by all utilities, and where required casements shall be provided with approval by the Utility Superintendents. All utility distribution lines shall be installed within public right-of-way or within property designated easements. When practicable and feasible, all utilities shall be placed underground and shall be completed prior to street surfacing. All utility lines for telephone, cable television, and electrical services shall be placed in rear line easements when carried on overhead poles.
(I) Inspection. All required improvements shall be inspected by the Public Works Director. Construction at the expense of the subdivider.
(2006 Code, § 12.10)