A. Grading: The full width of the right-of-way of each street and alley dedicated in the plat shall be cleared and graded in accordance with the plan approved by the City Engineer. Boulevards shall be graded to an approved gross slope not less than two percent (2%) nor more than six percent (6%).
B. Paving: All streets and alleys shall be improved with a concrete or bituminous surface. Streets to be paved shall be surfaced for a nine (9) ton axle weight capacity using current Minnesota Highway Department design standards and in accordance with City standard design detail plates. Streets not to be paved shall be improved in accordance with the City standards. No building permit shall be issued for any lot or parcel in a subdivision prior to the installation of the first lift (wearing course) of bituminous surfacing or concrete surfacing on the streets thereof. Exceptions to this subsection may be granted by the City Council at their discretion as part of a development contract.
C. Soil Investigation:
1. To determine subgrade soils classification and bearing capacity of the soils in the proposed development, a soil investigation report shall be prepared under the supervision of a soils engineer associated with a qualified soils testing service.
2. Report of the results of the soils investigation shall be provided to the City Engineer. The report shall contain the design recommendation for street section based on nine (9) ton design. In proposed streets, soils investigation shall be performed at intervals not to exceed three hundred (300) linear feet. The soil borings completed during the investigation shall be at least ten feet (10') in depth below the proposed finished grade. Groundwater levels shall be reported at each boring. Elevations shall be in mean sea level datum. Locations of borings shall be measured in the field and accurately shown on the plans.
D. Concrete Curb And Gutter: All curb shall be concrete with integral gutter. The standard curb shall be vertical face (type B-6-18) in accordance with City standard design templates. In new residential developments where access locations to lots are not known, a surmountable curb in accordance with City standard design templates may be used subject to the approval of the City Council if the radius of curvature of the street is two hundred feet (200') or larger and except at intersections and catch basin inlets.
E. Boulevards: All boulevards shall have four inches (4") of topsoil (black dirt) placed on them and then shall be sodded or seeded. (Prior Code § 21-8-2)