§ 92.17 DESIGN STANDARDS.

   (A)   The following table of minimum requirements and specifications for private roads shall apply.

Minimum Requirements and Specifications for Private Streets and Roads
	Class A	Class B
Base
Gravel surface	Where permitted by variance of the township, 6 inches of crushed limestone, slag or processed road gravel (MDOT 22A or 23A) in two equal courses, each compacted 22 feet wide	Same as Class A, except 16 feet wide
Paved surface	6 inches of crushed limestone, slag or processed road gravel (MDOT 22A) in two equal courses, each compacted 28 feet wide	Not applicable unless paving is requested by applicant
Pavement	2.5 inches bituminous aggregate #1100 mix, 22 feet wide	Not applicable
Curb and gutter
May be required by Township Engineer in consideration of narrow lot, width and road grade	Where required, curb and gutter shall meet requirements of the current MDOT specifications for straight-back or roll curb	Same as Class A
Ditches
Minimum grade	0.5%	Ditches shall be of sufficient width, depth and grades to provide for adequate and positive drainage
Grades of 0.5% to 4.0%	Shall be sodded or otherwise stabilized	Same as Class A
Grades of 4.1% and steeper	Shall be stabilized with rip-rap	Same as Class A
Grades of front/back slopes	Shall not exceed 1-on-4	Same as Class A
Easement width	66 feet	66 feet
Roadway curves
Horizontal minimum	230-foot radius	Same as Class A
Vertical minimum	100 feet long for changes in gradient of 2% or more	Same as Class A
Roadway grades
Maximum	5.5%	Same as Class A
Minimum	0.5%	Same as Class A
Sub-base	Depth will vary depending upon native soil types; spread to a minimum width sufficient to extend to the front slope of the roadside ditch	Same as Class A
Turnaround areas
Cul-de-sac	60-foot radius easement, 46-foot radius roadway surface	Same as Class A
T Type	May be substituted for cul-de-sac if applicant can show that it will function as well as the required turning circle	Same as Class A

 

   (B)   In addition to the standards and specifications set forth in division (A) above, all private roads shall meet the following additional minimum requirements and specifications.

      (1)   The roadway surface and cul-de-sac area shall be centered in the right-of-way.

      (2)   The connection between the private road and the public road shall conform to the standards and specifications of the County Road Commission. Where a gravel base private road connects to a paved village or county road, the private road shall have a paved approach.

      (3)   Underground crossroad drainage shall be provided where the proposed road crosses a stream or other drainage course. Necessary culverts and erosion treatments shall be provided in accordance with the specifications of the County Road Commission and/or County Drain Commissioner.

      (4)   The private road easement and road shall be adequately drained so as to prevent flooding or erosion of the roadway. Ditches shall be located within the private road easement. Road drainage shall be constructed so that the runoff water shall be conveyed to existing watercourses or water bodies. Drainage shall not be discharged upon the land of another property owner unless the water is following an established watercourse or drainage pattern. The discharged water onto adjoining properties shall also not exceed the normal agricultural rate. Connection to county drains shall be approved by the County Drain Commissioner prior to the issuance of permit.

      (5)   Private road signs shall be erected and maintained in accordance with the Michigan Manual of Uniform Traffic-Control Devices. All private roads shall be named and provided with street name signs at all intersections with other public or private roads.

      (6)   The road easement shall provide for ingress, egress, drainage and installation and for maintenance of public and private utilities.

      (7)   The private road shall be subject to all other village, county and state permits and regulations.

(Prior Code, § 92.19) (Ord. 26, passed 3-1-1994)