(A) Final plans are required:
(1) Following the City Engineer’s approval of the conceptual and preliminary plans, and in conjunction with the final plat stage of the major plat process.
(2) In conjunction with minor plats or replats, depending on the size of the lots and anticipated planned development, the final plan is at the discretion of the City Engineer. Final plans are to be submitted to the City Engineer after the conceptual and preliminary plans have been approved.
(3) In conjunction with a planned development district.
(B) Scale, size and submittals.
(1) The final plans shall be at a scale of 50, 60, 100 or 200 feet to 1 inch. Profile views shall be a tenth of the plan view scale (i.e. 1" = 50' plan view requires a 1" = 5' profile view).
(2) The plans shall be drawn on an 11" x 17" sheet.
(3) The developer shall submit all required copies to the City Engineer. All copies shall be signed and be sealed by a registered professional engineer in the State of South Dakota.
(C) Information required. Final plans are to be utilized during construction of the development, as such, they must provide the contractor sufficient information for construction of all infrastructure (locations, elevations, and any pertinent notes). Final plans shall, at a minimum, consist of the following plan sheets and supplemental plan sheets may be required depending on specific circumstances of a development:
(1) General layout plan. The general layout plan shall show the proposed road alignments along with the sidewalks curb and gutter, proposed lots and any existing features that will remain in place after development is completed.
(2) Grading plan. The grading plan shall show the existing contours with intervals acceptable to the City Engineer’s office. Any proposed cut and fill operations must also be shown if they will substantially alter existing land elevations.
(3) Drainage plan. A final storm drainage study as required by the storm drainage design and technical criteria manual, or by the City Engineer, shall be submitted for final approval. The drainage plan shall also indicate which downstream drainageways or detention basins will be affected by the full
development of the subdivision. A plan and profile of the proposed storm sewer system shall also be included. The storm sewer shall be in relation to the centerline of the street.
(4) Street/road plan. The street/road plan shall show the proposed street alignments along with curb and gutter and sidewalks. The centerline shall be stationed at critical locations. The curb and gutter shall be stationed and offset based on the stationing used on the centerline. Elevations shall also be included for the curb and gutter at critical locations (i.e. intersections crest and sag vertical curves). Along with the plan view of the street or road, plans shall also depict the centerline profile along with the curb and gutter flow line profile at intersections and at crest and sag vertical curves. Existing and proposed centerline elevations shall be included on the plan sheets.
(5) Utility plans. Separate plans for all municipal utilities (water, sanitary and street lighting) will be required. The plans shall show the proposed utility in relation to the centerline of the proposed street. The plan view shall show the proposed utility line, all of the structures associated with such utility and the location of all services. The profile view shall show the elevations of the proposed utility along with the location, and elevations, of any intersecting utility. A separation distance shall be shown on the profile view for all conflicts between utilities. The street lighting plan shall be completed as per current city standards.
(6) Typical cross section sheets. Typical cross section sheets shall show the proposed typical cross section’s width along with the right-of-way and the proposed pavement section. The existing street cross section will also be shown along with the existing pavement section. Any dimensions will be in relation to the proposed street centerline. Developer may only use an already approved typical cross section.
(7) Construction detail sheets. Construction detail sheets shall show all details needed for construction of all infrastructure improvements. The developer shall utilize the approved details, as well as additional details required by the City Engineer prior to construction.
(8) Road cross section sheets. Road cross sections shall be shown every 50 feet based on the centerline stationing. In addition, cross sections shall be shown at the start and end of any horizontal and vertical curves along with cross sections every 25 feet. A cross section shall also be placed at intersections, driveways and culverts.
(9) Groundwater control plan. Groundwater elevations shall be required where it is deemed necessary by the City Engineer to establish a finished grade for the proper development of the subdivision. When elevations are required, the method of groundwater collection shall be indicated for all lots prior to development. Dewatering for the purposes of establishing a lower finished grade is prohibited. Buildings with crawl spaces or slab-on-grade construction shall be exempt from groundwater collection requirements.
(10) Construction specifications. Construction specifications shall be in accordance with the city, the South Dakota Department of Transportation or any other previously approved construction specification.
(D) Approval process. The final plans shall be reviewed and approved by the City Engineer prior to the proposed development being constructed. No building permit shall be issued until a final plan has been approved by the City Engineer.
(Ord. 1251, passed 4-18-2011; Am. Ord. 1369, passed 5-21-2018)