The final plat of the subdivision shall conform to the following standards of improvements:
(A) Monuments and markers.
(1) Shall be so placed so that the scored or marked point shall coincide exactly with the intersection of lines to be marked, and shall be set so that the top of the monument is level with the surface of the surrounding ground after final grading.
(2) Monuments shall be set:
(a) At the intersection of all lines forming angles in the boundary of the subdivision; and
(b) At the intersection of street centerlines and at the beginning and ending of all curves or angles along the street centerline.
(3) Markers shall be set:
(a) At the beginning and ending of all curves along street property lines;
(b) At all points where lot lines intersect curves, either front or rear;
(c) At all angles in property lines of lots;
(d) At all other lot corners;
(e) At a given distance from the lot corner on the property line where the lot corner falls in a stream or other accessible place.
(4) Monuments shall be or concrete or stone with a minimum size of four inches by four inches by three feet, and shall be marked on top with a five-eighths inch iron dowel embedded within and set flush with the top of the monument. It shall be permissible when set in a concrete street to the cement an iron dowel in a drilled hole. Monuments in asphalt streets shall be a driven (or drilled-in five-eighths 5/8 inch steel rod two feet in length.
(5) Markers shall consist of iron pipes or iron steel bars at least two feet long, and not less than five-eighths inches in outside diameter.
(B) Other improvements.
(1) The improvements which shall be required to be installed by the subdivider will vary with the location of the subdivision in relation to the corporate boundary of the town and the number of families to be accommodated per acre of gross area included in the subdivision.
(2) (a) Streets shall be completed to grades shown on plans, profiles and cross sections approved by the relevant town regulatory authorities (Planning and Zoning Board, Board of Zoning Appeals and Town Council).
(b) Streets shall be surfaced to a minimum width, according to the type of street, as follows:
1. Local streets - 26 feet where no street parking is to be permitted; the minimum setback line is 40 feet and a driveway of sufficient size to permit the off-street parking of three cars is provided; in all other cases the minimum surfaced width shall be 32 feet.
2. Curb and gutter shall be required to be installed along the edges of all streets and the widths required above shall include the curb and gutter.
(C) Sidewalks. Sidewalks shall be provided as follows:
(1) Sidewalks on each side of the street within a subdivision shall be provided by the subdivider unless otherwise agreed to.
(2) Sidewalks shall be constructed of portland cement concrete with a minimum thickness of four inches and a minimum width of four feet. A minimum thickness of six inches shall be required where used as a part of a driveway.
(3) When sidewalks are required, ramps suitable to the safe movement of mobility impaired persons shall be provided by the subdivider. A ramp shall not have a slope greater than one foot rise in 12 feet, or 8.33%, or four degrees 50 minutes. The specific design of such ramps shall be approved by the Commission and shall conform to the recognized standards of the Indiana Department of Highways, the American National Standards Institute, Inc. and the U.S. Department of Health, Education and Welfare, or any other applicable agency.
(D) Sewage disposal. The subdivider shall provide for the disposal of sewage in the subdivision by one of the following methods:
(1) Sewerage system.
(a) A complete sanitary sewer system which shall connect with a sanitary sewer outlet approved by the relevant local, county and state authorities.
(b) A complete sanitary sewer system which shall be plugged and capped when a sanitary sewer outlet is not available within a reasonable distance from the subdivision site.
(2) In this division (D), the next division (E) the phrase “the subdivider shall provide” shall be interpreted to mean that the subdivider shall install the facilities referred to or, that the subdivider shall require as a condition of the sale of each lot or parcel in the subdivision, that the facilities referred to in these divisions shall be installed by the developer of the lots in accordance with these regulations. In all instances, the subdivider shall provide a complete sanitary sewer system as specified within the boundaries of the subdivision.
(E) Water supply. The subdivider shall provide the subdivision with a source of water for domestic use water main system, a complete water main supply system which shall be connected to the water utility system serving the town.
(F) Storm drainage and sediment control.
(1) General requirements. The sub-divider shall provide the subdivision with a storm drainage system adequate to convey expected rainfall as follows: The storm water drainage system shall be separate and independent of any sanitary sewer system. The relevant regulatory authorities (Planning and Zoning Board, Board of Zoning Appeals and Town Council) shall not recommend for approval any subdivision plat which does not make adequate provision for storm or floodwater runoff through properly designed conduits, channels, or basins or connections to existing systems within the town as shall be approved.
(2) Design criteria.
(a) The plans for the construction of the required drainage facilities shall be based upon a report, which includes an evaluation of the proposed development, tributary drainage areas, outfall conditions and impact upon the overall drainage systems of the general area. The principal criteria to be observed is the release rate of storm water from the developments may not exceed the storm water runoff from the land area in its present state of development, or the present capacity of the receiving channel.
(b) The subdivider shall be required to carry away water by either conduit or open channel from either storm or high ground water conditions that may exist either previously to, or as a result of the proposed subdivision. The drainage facilities provided shall be located in the street right-of-way where feasible, or in perpetual, unobstructed easements of appropriate width. Maintenance covenants or agreements shall be provided by the subdivider or subsequent lot owners in the case of easements for the perpetual maintenance of the drainage facilities.
(c) Outflow discharge rates from the subdivision drainage system shall be based upon the runoff standards of the IDEM on the existing undeveloped property. The outflow discharge rates may be further restricted if the town determines the receiving facility is inadequate to handle the flow.
(d) Inlets and catch basins shall be provided so that surface water is not carried across or around any intersection, nor for a distance of more than 600 feet in the gutters of when the encroachment of storm water into the streets impede traffic. When calculations indicate that curb capacities are exceeded at a point, no further flow shall be permitted beyond that point and inlets of catch basins shall be used to intercept flow at that point. The grading plan shall include surface water drainage patterns for each and every lot and block for the entire proposed area to be drained.
(e) Subsurface drains shall be constructed at all street grade low points to a minimum distance of 100 feet either side of the low point parallel to and one foot outside the back of each curb line. These subsurface drains shall be connected to the drainage structures located at the street low points. The placement of additional subsurface drains may be required by the Town Engineer in areas affected by high ground water tables.
(f) Design accommodations shall be provided with the drainage system for all upstream drainage areas whether inside or outside the proposed subdivisions.
(g) Areas of poor drainage - areas which are not in the floodway but contain soils which are subject to flooding may be approved for subdivision by the town, provided that the subdivider fills the affected areas of said subdivision in an acceptable manner to an elevation sufficient to place building sites and streets two feet above ponding levels.
(h) Areas of high seasonal water tables - in areas characterized by soils having a high seasonal water table lots shall be limited to slab type constructions unless the Commission determines that appropriate engineering techniques will be applied to alleviate the subsurface problem.
(i) Street signs - standard city street signs shall be installed by the subdivider at all street intersections at the developers costs.
(j) Street lights - a street lighting system shall be provided by the subdivider in accordance with the recommendations of the Planning and Zoning Board.
(Ord. 07-01, adopted 5-5-2007, updated 5- -2009, § 3.109)