(A) Engineering plans. Engineering plans in support of the preliminary plat shall be prepared under the direction of, and signed and sealed by, a professional engineer registered in the State of Arizona.
(B) Supplemental submittals. Supplemental submittals at this stage, such as grading, drainage or street plans, should be preliminary plans, not final design construction plans. They are the type of plans that clearly show the intent of the design and are needed to evaluate the viability of the preliminary plat and to allow the reviewing agencies to make reasonable decisions. The plans may generally be prepared using scaled distances and elevations taken from the topographic map used for the preliminary plat. All supplemental submittals must be consistent with each other and the preliminary plat.
(C) Submission. The following material shall accompany the submission of all preliminary plats (if this data is not included on the preliminary plat, then digital copies are required).
(D) Covenants. A preliminary draft of the proposed deed restrictions or protective covenants to be incorporated in the final plat submittal, including provisions for use and maintenance of commonly-owned facilities, if any, shall accompany the submission of the preliminary plat.
(E) Street names. Submit a list of the proposed street names. Street names and numbers shall conform to the town's master street address guide.
(F) Preliminary grading plan. A preliminary grading plan shall be required when cuts or fills are reasonably expected to exceed 5 feet in height in areas or will extend outside of the normal street right-of-way. The preliminary grading plan shall be in sufficient detail to convey the extent of grading activities such that their impact can be evaluated by the reviewing agencies. The scale of the preliminary grading plan shall be smaller than 1"=100'. The plan shall include existing and finished grade contours and limits of cut and fill areas. Driveway and building locations shall be shown when topographic or other constraints are reasonably expected to require specific locations or special site grading. A geotechnical report certified by a registered professional engineer in the State of Arizona shall accompany the grading plan to support the slope stability facets of the grading plan, and to make recommendations regarding the grading of streets and lots, the compaction of embankment areas and fill sections, and the design recommendations for pavements and foundations.
(G) Preliminary street plans. Grades shall be given to the nearest whole percent grade. Street plan and profile sheets shall be prepared at a scale sufficient to allow evaluation of the proposed streets, but in no case shall the scale be smaller than 1"=50'. Proposed drainage structures within the street right-of-way shall be shown on the preliminary street plans. The preliminary grading plan may be shown on the preliminary street plans if all of the grading will be related directly to the street construction. The reviewing agency's interests in these plans are:
(1) Height, stability and slope of cut and fills;
(2) Affected drainage patterns;
(3) Potential roadway geometric layout;
(4) Impacts of the streets on adjacent lots and properties;
(5) Access to the subdivision and needed off-site street improvements;
(6) Drainage facility concepts for cross-street drainage and for on-street drainage; and
(7) Other items that may be specific to the streets for the proposed subdivision.
(H) Preliminary utility plan.
(1) A preliminary utility plan shall be prepared to illustrate the proposed location of utilities and verify that the necessary easements and rights-of-way are proposed on the preliminary plat.
(2) For sewers, this will include location and size of proposed lines; and location and depths of existing manholes and cleanouts. For water installations, this should include location and size of proposed water lines, fire hydrants, valves, meter vaults and the like. The location and size of the existing water lines to be connected to, and nearby off-site fire hydrant and water valve locations, shall also be shown.
(3) Detailed and specific construction improvement plans are to be submitted at the final plat stage. It is recognized that final utility locations are decided by the individual utility companies, but the objective of the preliminary utility plan shall be to encourage cooperation by the various utilities with the subdivider and the town in the planning and design of utilities to serve the proposed subdivision.
(4) A statement regarding availability and adequacy of existing utilities and the direction and distance thereto, shall be shown on the preliminary utility plan and preliminary letters of serviceability from the respective utility companies shall be submitted.
(I) Preliminary drainage report. A preliminary drainage report, covering the details of surface stormwater runoff and of flood conditions and the specific effects of floods on the area being subdivided, shall be submitted with identified impacts from upstream flows on the project and impacts on downstream properties. The drainage report shall identify the location and preliminary sizes for retention basins required to handle the 100-year storm without flooding building sites, per Town Code Chapter 151, or any successor ordinance.
(J) Exceptions. Describe any exceptions from ordinance standards being requested in response to special circumstances which may be posed by the site and submit an application for exception from these regulations or associated design or improvement standards on a form provided by the town for this purpose (see § 153.005).
(L) Phasing. A development phasing plan and schedule with completion dates shall be submitted for any multi-phase subdivision.
(Ord. 2007-2, passed 5-29-2007; Am. Ord. 2014-02, passed 12-15-2014; Am. Ord. 2021-06, passed - -)