A. 
Sanitary sewers.
(1) 
Minimum requirements shall be as established by the New York State Department of Environmental Conservation, pursuant to Environmental Conservation Law § 17-0301, as amended or changed, and Title 8 of said law (Environmental Conservation Law § 17-0801 et seq., as amended or changed).
(2) 
Sewer mains shall be a minimum of eight inches in diameter, except in those areas where the route within the development is part of the Master Sewer Plan. In these areas, the sewer shall be of the diameter called for in the Master Sewer Plan.
(3) 
Manhole spacing shall be a maximum of 300 linear feet
(4) 
The depth of the sewer shall provide for basement drainage (or slab construction) of all homes within the development. Where, because of topographic conditions, this provision cannot be met, the Plan shall incorporate a note specifying those lots which cannot be served in compliance with this requirement.
(5) 
Elevations. Where storm drains are parallel the sanitary sewer system, a minimum of two feet of vertical clearance between the two systems shall be provided to permit the satisfactory installation of laterals.
(6) 
Cleanouts shall be provided every 85 linear feet of the lateral and at the right-of-way (ROW) or easement line, at grade level with brass caps.[1]
[1]
Editor's Note: Amended at time of adoption of Code; see Ch. 1, General Provisions, Art. I.
(7) 
Sanitary manholes for sewers eight inches to 12 inches in diameter shall be a minimum of four feet zero inches inside diameter; for sewers over 12 inches diameter, a minimum five feet zero inches inside diameter manhole is required.[2]
[2]
Editor's Note: Amended at time of adoption of Code; see Ch. 1, General Provisions, Art. I.
(8) 
All sanitary sewers require a minimum of six inches of crushed stone bedding.[3]
[3]
Editor's Note: Amended at time of adoption of Code; see Ch. 1, General Provisions, Art. I.
B. 
Sewage lift stations.
(1) 
Specific geographic and/or topographic areas may require the use of sewage lift stations to transmit contributory flows to the trunk sewer system. Lift stations shall incorporate the following design requirements:
(a) 
Compliance with design criteria of the New York State Department of Environmental Conservation.
(b) 
Provision of a telephone alarm system which is electrically operated, with backup battery power.[4]
[4]
Editor's Note: Amended at time of adoption of Code; see Ch. 1, General Provisions, Art. I.
(c) 
Provision of outside piping connections to be used in case of power or mechanical equipment failure.
(d) 
Provisions for standby power generators.[5]
[5]
Editor's Note: Amended at time of adoption of Code; see Ch. 1, General Provisions, Art. I.
(2) 
Provisions are to be compatible with existing lift stations in the town, and shall be subject to the approval of the Commissioner of Public Works.[6]
[6]
Editor's Note: Amended at time of adoption of Code; see Ch. 1, General Provisions, Art. I.
Storm drainage systems shall be generally designed and provided to adequately convey anticipated runoffs occurring from storms which occur with a frequency of once in 10 years, as indicated in nomographs prepared by the Monroe County Planning Council.
A. 
Removal of spring and surface water. The applicant shall be required by the Planning Board to provide adequate drainage systems to carry any spring or surface water that may exist either previous to or as a result of the subdivision. Such drainage facilities shall be located in the street right-of-way where feasible or in perpetual unobstructed easements of such widths as designated in this chapter.
B. 
Drainage structure to accommodate potential development upstream. A culvert or other drainage facility shall, in each case, be large enough to accommodate potential runoff from its entire upstream drainage area, whether inside or outside the subdivision. The Town Engineer shall approve the design and size of the facility based on anticipated runoff under ultimate development bases on accepted engineering criteria and parameters.
C. 
Responsibility for drainage downstream. The applicant's engineer shall also study the effect of each subdivision on the existing downstream drainage facilities outside the area of the subdivision; this study shall be reviewed by the Town Engineer. Where it is anticipated that the additional runoff incident to the development of the subdivision will overload an existing downstream drainage facility, the Planning Board shall notify the Town Board of such potential condition. In such case the Planning Board shall not approve the subdivision until provision has been made for the improvement of said condition.
D. 
Land subject to flooding. Land subject to flooding or land deemed by the Planning Board to be uninhabitable shall not be platted for residential occupancy, nor for such other uses as may increase danger to health, life or property or aggravate the flood hazard, but such land within the plat shall be set aside for such uses as shall not be endangered by periodic or occasional inundation or improved in a manner satisfactory to the Planning Board to remedy said hazardous conditions.
E. 
Flood hazard prevention. The applicant shall be required to control soil erosion of land surface and drainage channels and the prevention of inundation and excessive groundwater seepage by comprehensive site grading and the establishment of adequate elevations of buildings, building openings and roadways above the observed, anticipated or computed water levels of storm sewers, streams, channels, floodplains, retention basins and swales.
F. 
Runoff computations.
(1) 
Runoff shall be established from the rational formula as follows:
Q = AcI
Where:
Q = Runoff (cfs)
A = Acreage of the drainage basin involved
c = Coefficient of runoff (minimum for subdivision development 0.40)
I = Intensity of rainfall in inches per hour
(2) 
Minimum times of concentration can be assumed at 15 minutes.
(3) 
Nomographs to determine factors for the computation of the runoff shall be those as developed by the Monroe County Planning Council.
(4) 
The applicant's engineer shall submit the following information regarding the design of storm drainage facilities with the final map (scale of 1:24,000).
(a) 
A USGS section map (scale of 1:24,000) with the outline of the development and the drainage basin.
(b) 
A tabular form (see Appendix B for typical format[1]) showing computed runoffs and design capacities of the drainage system.
[1]
Editor's Note: Appendix B is included at the end of this chapter.
(5) 
Points of discharge. Storm drainage shall be discharged to recognized USGS drainage courses. This may require applicants to obtain downstream easements from adjoining property owners to permit this drainage across their properties. The applicant shall be required to construct and maintain temporary silt settling basins at the point of discharge into the stream. The basin shall be operable until the completion of the subdivision.
G. 
Storm drains. Storm drains shall conform to the following specifications:
(1) 
Minimum pipe sizes shall be 12 inches in diameter.
(2) 
Minimum velocity when flowing full shall be three feet per second.
(3) 
Maximum manhole and catch basin spacing shall be 300 linear feet.
(4) 
Builders (where necessary) shall provide backwater valves on all laterals where the storm drain is at such an elevation to permit gravity drainage from the basements adjacent to the system.
(5) 
All outfall pipes must be reviewed by the Town Engineer and Commissioner of Public Works.
H. 
Storm laterals. Storm laterals, if required, shall be six inches in diameter. Sump pumps and roof runoff shall not be permitted to tie into the storm laterals directly unless requested by the Commissioner of Public Works. Splash pads shall be required for storm outlets.
I. 
Catch basins. Catch basins shall be placed at all low points and intersections with maximum spacing of 300 feet. Catch basin leads shall only be connected to the storm drains at manholes except in those areas where the storm drain is 24 inches in diameter or greater.
J. 
Storm manholes.
(1) 
The inside diameter of storm manholes shall be determined as follows:
Storm Drains
(inches)
Inside Manhole Diameter
(feet)
12 to 18
4
21 to 30
5
36 to 42
6
Greater than 42
Individual structures will be required.
(2) 
A schedule of manhole diameters shall be provided on the final plat.
K. 
Drainage easements. The minimum width for drainage easements shall be 20 feet.[2]
(1) 
Enclosed conduits and appurtenances. An easement not less than 20 feet in width, sufficient to contain the enclosed conduit and appurtenances thereof and to provide working space for personnel and equipment for the service thereof, shall be indicated on the map of the development and designated as follows: "Drainage Easement to Town of Irondequoit." Drainage easements, insofar as possible, shall be placed along or adjacent to lot boundary lines in a parallel or straight alignment.
(2) 
Easements for natural watercourses.
(a) 
Natural primary watercourses which traverse a development shall be preserved by an easement of sufficient width, including overbanks, which will adequately pass the projected design flow. The gross allowable depth of flow shall not create a flood hazard to existing or proposed development and improvements. The channel and overbank widths, together with a minimum twenty-foot continuous maintenanceway on each side, shall constitute the floodway encroachment limits, as further defined under the EPOD District regulations of Chapter 235, Zoning.
(b) 
In natural tertiary and secondary watercourses which contain insufficient waterway area to convey the flow from the ultimate development, but which may prove deficient only at infrequent intervals and location, and where minor improvements could provide an adequate channel and still preserve, in the main, the natural channel beauty or fish and wildlife values, the applicant shall make such minor channel improvements as are required to provide a channel which would otherwise meet the conditions of this chapter. Additional widths of scenic areas and areas of natural wetlands which, for economic reasons or limited suitability, would not warrant improving for urban development, may be dedicated by the applicant in addition to those above. Areas offered for dedication to the town as drainage easements, if considered of special interest to the town by the Planning Board, may be considered by the Planning Board as dedication for the municipal purposes of § 278 of the Town Law, as amended or changed, and its authority thereunder.
(c) 
Easements for constructed channels and appurtenances. Earth channels constructed within the development shall have sufficient easements dedicated to contain the top width of the channel, plus a minimum twenty-foot wide continuous maintenanceway, one side for channels less than 20 feet in width at water surface. A twenty-foot wide continuous maintenanceway shall be provided on both sides of a channel with a water surface width greater than 20 feet. The easements for constructed channels shall be indicated on the map of the development and designated as follows: "Drainage Easement to Town of Irondequoit."
[2]
Editor's Note: Amended at time of adoption of Code; see Ch. 1, General Provisions, Art. I.
Water mains shall conform to the specifications of the Monroe County Water Authority or the Sea Breeze and Vicinity Water District and local fire districts.
A. 
The Planning Board shall, wherever possible, establish the preservation of all natural features which add value to residential developments and to the community, such as large trees or groves, watercourses and falls, beaches, historic spots, vistas and similar irreplaceable assets. No tree with a diameter of eight inches or more as measured three feet above the base of the trunk shall be removed, unless such tree is within the right-of-way of a street as shown on the final plat or where impractical to retain. Removal of additional trees shall be subject to the approval of the Planning Board.
B. 
Lot grading shall conform to the following specifications:
(1) 
Finished lot grading shall provide for the effective removal of stormwater runoff to the drainage system.
(2) 
The finished grade at the house line shall permit a minimum of 2.0% grade to the drainage system.
(3) 
Drainage to side or rear lot swales shall be permitted, provided that:
(a) 
Swales are of a proper cross section to permit ease of maintenance by the individual owner.
(b) 
Where necessary, easements are provided for access and/or maintenance.
(4) 
A lot grading plan shall be submitted with the final plat for the development, showing the following items:
(a) 
Existing contours.
(b) 
Spot elevations at key locations.
(c) 
First floor elevations.
(d) 
Directional arrows for drainage.
A. 
Pavement widths. Standard pavement widths shall comply with the typical cross sections shown in the Appendix D.[1] Additional widths may be required by the Planning Board upon findings that the same are required for public safety and convenience, parking in commercial or public use areas, old roads which do not provide the proper widths and where, as a consequence, additional dedication is necessary.
[1]
Editor's Note: Appendix D is included at the end of this chapter.
B. 
Horizontal alignment.
(1) 
Except for local residential streets and rural streets and roads, there shall be a tangent of at least 100 feet measured at the center line between reverse curves.
(2) 
Proper sight distances shall be provided with respect to both horizontal and vertical alignment. Measured along the center line, the sight distance shall be 400 feet for primary roads or major thoroughfares; 200 feet for collector streets or roads and 100 feet for local residential streets and rural streets and roads.
(3) 
Proper sight lines shall be maintained at all intersections of streets measured along the center line; there shall be a clear sight triangle of 75 feet from points of intersection. Visibility for purposes of traffic safety shall be provided within the triangular area formed by intersecting street lines and the diagonal connecting the end points of these lines. The distance as measured along the intersecting street lines shall be a minimum of 75 feet from the point of intersection for arterial and collector streets and 50 feet for minor streets. No visual obstructions shall be permitted in this area, including, but not limited to:
(a) 
Structures.
(b) 
Plantings with a mature height of more than three feet.
(c) 
Earth fill for any purpose.
(4) 
Right-angle intersections shall be used wherever practicable, especially where local residential streets and rural streets and roads empty into major or collector thoroughfares, and there shall be no intersection angle measured at the center line of less than 75º.
(5) 
Street curb intersections shall be rounded by a tangential arc with a minimum radius of 30 feet for local residential streets and rural streets and roads and 45 feet for intersections, including collector streets or roads and primary roads or major thoroughfares.
(6) 
Culs-de-sac shall not exceed 500 feet in length and must be designed with a turnaround having an outside roadway diameter of at least 100 feet and a street property line diameter of at least 120 feet.
(7) 
Intersecting minor and secondary streets leading from the same subdivision shall not empty into the same side of a major thoroughfare at intervals less than 800 feet.
(8) 
The minimum radius at the center line for curves on primary roads or major thoroughfares shall be 500 feet; for collector streets or roads, 300 feet; and for local residential streets and rural streets and roads, 150 feet.
C. 
Road grades. Road grades shall conform to the following specifications:
(1) 
Minimum grade shall be 0.50% for all streets.
(2) 
Maximum grade shall be:
(a) 
Primary and major thoroughfares and collectors: 5%.
(b) 
Local residential: 8%.
(3) 
Vertical curves shall be used wherever the change in grade exceeds 1%.
(4) 
At intersections, leveling areas shall extend at least 100 feet from the center line of intersection at maximum grade not to exceed 3%.
D. 
Concrete gutters or curbs. Concrete gutters or curbs shall be provided along the edges of all roads to be dedicated to the town.
E. 
Sidewalks. Sidewalks shall conform to the specifications and details herein included.
Where land areas are reserved for future connections to adjacent parcels, all improvements, i.e., sanitary, storm, water, roads, etc., shall be constructed to the common property line. This requirement may be waived by the Planning Board.
The materials included herein are intended to establish the necessary degree of excellence required for installation within the town. Where other materials may be proposed in substitution for those herein called for, the applicant or his or her agent shall submit a written request to the Town Engineer for approval. When new materials may be made available, their use may be permitted in limited test sections with the restriction that, should these materials prove unsatisfactory through the test period, as established by the Town Engineer, they shall be removed and replaced with those herein called for at no expense to the town.
A. 
Main sewer.
(1) 
Polyvinyl chloride (PVC) main sewer. Polyvinyl chloride (PVC) sewer pipe for use as nonpressure lines in conveying sewage wastes shall be supplied in accordance with ASTM D-3034 and/or the latest revisions thereto. Eight-inch and twelve-inch pipe shall be supplied in lengths of 13 feet. All tests required by the above specifications shall be conducted in the continental United States, and the town's authorized representative shall have access to witness these tests at the purchaser's expense. Minimum strength classification shall be SDR 35.
(2) 
Ductile iron pipe (DIP) main sewer. Ductile iron pipe (DIP) sewer pipe for use as nonpressure lines in conveying sewage waste shall be supplied in accordance with AWWA C-151/ANSI A21.51, thickness Class 50, with ANSI A21.4 cement mortar lining and seal coating inside, bituminous coating outside and ANSI 21.11 push-on joints.
B. 
Sewer lateral pipe. For polyvinyl chloride (PVC) sewer pipe for use in conveying domestic sewage from the property line to the sewer main, strengths shall be ASTM D-3034/SDR 35 and ASTM D-2241/SDR 21.
C. 
Polyvinyl chloride (PVC) force main. Polyvinyl chloride (PVC) sewer pipe for use in conveying domestic sewage under pressure, shall be supplied in accordance with ASTM D-2241/SDR 21, pressure-rated pipe, 200 psi pressure rating, with elastometric gasket bell ends and PVC fittings and adapters.
D. 
Manholes.
(1) 
All manholes shall be of precast reinforced concrete sections manufactured in accordance with ASTM Specification C-478. Riser sections shall have super O-joints and gaskets conforming to ASTM C-443, except the taper of the joints shall be 2º with a tolerance of 1/32 inch. Manhole bases may be preformed or poured in the field. The roof slabs shall be precast of structural concrete, reinforced to withstand a concentrated wheel load of eight tons, plus one-hundred-percent impact. Either tapered, conical or slab tops will be permitted for the top section.
(2) 
Interior and exterior surfaces of all sanitary manholes shall be sealed with heavy-duty coal tar coating which complies to ASTM D-450, Type B, as approved by the Town Engineer.
[1]
Editor's Note: Amended at time of adoption of Code; see Ch. 1, General Provisions, Art. I.
A. 
Reinforced concrete pipe. Reinforced concrete pipe shall be supplied in conformance with ASTM Specification C-76, Wall B. Joints shall be of the compression-type II.[1]
[1]
Editor's Note: Former Subsection A, which established the criteria for asbestos cement pipe, and immediately preceded this subsection, was deleted at time of adoption of Code; see Ch. 1, General Provisions, Art. I.
B. 
Corrugated metal pipe. All pipe shall be coated inside and outside. Joints shall be made with connecting bands and rubber gaskets to ensure tight joints. Thickness gauges shall be dependent on the load conditions, except that 16-gauge shall be the minimum allowable thickness.
A. 
Catch basins shall be constructed per the detail of masonry brick conforming to ASTM C-32, with mortar consisting of one part portland cement to 1 1/2 parts sand.
B. 
Precast catch basins shall also be considered upon request to the Commissioner of Public Works.
C. 
Catch basin leads shall be ten-inch, fully coated and perforated corrugated metal pipe, 14-gauge with bands and gaskets.
Manhole ladders or steps shall be provided in all sanitary and storm manholes and shall be constructed of one of the following materials:
A. 
Noncorrodable, aluminum magnesium alloy ladders, as made by Fraser and Jones, Solvay, New York, or an approved equal, with intermediate supports at five-foot intervals.
B. 
Forged aluminum with a drop-front design and grooved tread surface.
A. 
Sanitary manhole frames and covers. Sanitary manhole frames and covers shall be round Neenah R-1726 or Woodward M-138, or an approved equal. The word "Sanitary" shall be cast into the top of the cover. The inside diameter for clearance shall be a minimum of 23 inches.
B. 
Storm manhole frames and grates. Storm manhole frames and grates shall have a minimum clear opening of 23 inches and shall be Neenah 1728 or Woodward M-138 with vented lids, or an approved equal.
C. 
Catch basin frames and grates. Catch basin frames and grates shall be Neenah R-3205 or Woodward W-447, or an approved equal, for concrete gutter installation, with a minimum finished width of 16 inches of clear opening. The frames and grates for granite curbing installation shall be Neenah 3251, or an approved equal. Area frames and grates shall be Neenah 3210A standard grate.
All materials and methods of installation shall conform to either the Monroe County Water Authority or the Sea Breeze and Vicinity Water District specifications for the applicable service area.
A. 
Concrete required gutters and sidewalks shall:
(1) 
Be a minimum of 4,000 psi twenty-eight day compressive strength made of No. 1 and No. 2 Dolomite stone.
(2) 
Incorporate an air entraining admixture of the mix conforming to ASTM Specification C-2060.
B. 
Samples from each two truckloads of concrete delivered and placed on the site shall be taken and tested. Results of these tests shall be submitted to the town. After placement and curing, the surface shall be sealed with two coats of Koppers concrete sealer, or an approved equal.
C. 
Curbing (where required). Stone curb shall be an approved granite from acceptable sources. Granite shall be of the Rockport Grey granite type, or an approved equal, and shall conform to New York State Department of Transportation item No. 714, Type S. Each stone shall have a width of five inches, a minimum length of three feet and a depth of from 17 inches to 19 inches.
A. 
Base course, The base course shall consist of 12 inches of clean run-of-bank gravel in two six-inch lifts conforming to New York State Department of Transportation Item No. 304-2.02, Type 2 gravel or nine inches of crusher-run Dolomite stone conforming to New York State Department of Transportation Item No. 304-2.02, Type 2, crusher run stone, in two lifts, 4 1/2 inches each. Before placing the base course, the contractor shall receive the approval of the Commissioner of Public Works for the quality of the material and the condition of the subbase.
B. 
Binder course. The binder course shall consist of asphaltic concrete conforming to New York State Department of Transportation Item No. 403.13, Type 3.
C. 
Surface course. The surface course shall consist of asphaltic concrete conforming to New York State Department of Transportation Item No. 403.1901, Type 7F.
[1]
Editor's Note: Amended at time of adoption of Code; see Ch. 1, General Provisions, Art. I.
A. 
The mention of apparatus, articles or materials by name and such specific description of the same, as is made herein, is intended to convey to the contractor's understanding the degree of excellence required. The Town Engineer shall be the sole judge of the qualifications of the offerings and will determine all questions regarding the conformance of any offer with the specifications.
B. 
The contractor will furnish the exact equipment called for in the plans and specifications, unless the contractor files with the town the name and complete description of each article which he or she proposes to substitute, if the substitution is approved by the Town Engineer.