A.
The development of property shall conform with all
regulations established herein as well as with appropriate laws, rules,
and regulations established by all governing bodies having jurisdiction
over various phases of the development.
B.
Where a conflict arises between these regulations
and those of other agencies, the developer shall make known to the
concerned agencies the area of disagreement and endeavor to have such
agencies resolve their differences before proceeding with development.
A.
The term "utilities" as used herein shall be defined
as roads, sidewalks, street lights, street signs, drains, sewers,
water mains and appurtenances thereto which will, upon acceptance
by the Town, be turned over to the Town for maintenance and operation.
B.
Utilities shall be designed to conform with the topography
of the property and with existing utilities on adjacent streets or
property. Developers shall satisfy themselves by preliminary investigation,
and consultation with appropriate Town officials, as to the adequacy
of adjoining facilities upon which their property must rely for service,
most particularly water mains, sewers, drains and culverts. See Typical
Road Section Appendix[1] for utilities location.
[1]
Editor's Note: Said appendix is included at the end of this chapter.
C.
Developers bear the responsibility of providing sound
engineering design of all utilities, subject to the approval of the
Town. The design shall be prepared by a professional engineer licensed
to practice in the State of New York, who shall have had experience
in the design of such utilities. The design shall conform to the requirements
set forth herein.
D.
Utilities such as electrical, telephone, and cable
television shall be underground.
The developer shall submit sketch layout, preliminary plan, and final plat as required by Chapter 100, Subdivision of Land.
A.
Street arrangement.
(1)
Street systems shall be designed with due regard to
the needs for: convenient traffic access and circulation; traffic
control and safety; access for fire fighting, snow removal, and street
maintenance equipment; and stormwater drainage and sewage disposal.
Streets shall be designed to accommodate the prospective traffic,
and so arranged as to separate through traffic from neighborhood traffic
insofar as it is practicable.
(2)
The streets in contiguous subdivisions shall be coordinated
so as to compose a convenient system. Where a subdivision adjoins
undeveloped land its streets shall be laid out so as to provide suitable
future street connections with the adjoining land when the latter
shall be subdivided. A street thus temporarily dead-ended shall be
constructed to the property line and shall be provided with a temporary
"cul-de-sac" of the same dimensions as for permanent dead-end streets
if in excess of 200 feet, with a notation on the subdivision plat
providing for temporary easements for the turnaround until such time
as the street is extended. These same requirements shall apply at
the discretion of the Planning Board in those cases where the adjoining
land is another section of the same subdivision, and which is not
scheduled for development at the same time.
(3)
Streets shall be logically related to the topography
and all streets shall be arranged so as to obtain as many as possible
of the building sites at or above the grades of the streets. Grades
of streets shall conform as closely as possible to the original topography.
A combination of steep grades and sharp curves shall be avoided.
(4)
The Town Planning Board will consider the use of the
appropriate road section. The developer shall discuss this with the
Planning Board and obtain its approval at the sketch layout review
stage.
(5)
Where a subdivision abuts on or contains an existing
or proposed arterial street or other existing Town, county or state
highway the Planning Board may require marginal access streets, reverse
frontage with screen planting contained in a nonaccess reservation
along the rear property line, deep lots with or without rear service
alleys, or such other treatment as may be necessary for adequate protection
of residential properties and to afford separation of through and
local traffic.
(6)
Where a subdivision borders or contains an existing
or proposed railroad right-of-way or controlled access highway right-of-way,
the Planning Board may require a street approximately parallel to
and on each side of such right-of-way, at a distance suitable for
the appropriate use of the intervening land, for park purposes in
residential districts, or for business, commercial or industrial purposes
in appropriate districts. Such distances shall also be determined
with due regard for the requirements of approach grades and future
grade separations.
B.
Dead-end streets.
(1)
Where a street does not extend to the boundary of the subdivision and its continuation is not needed for access to adjoining property, it shall be separated from such boundary by a distance sufficient to accommodate a lot meeting the requirements of Chapter 120, Zoning. Reserve strips of land shall not be left between the end of a proposed street and an adjacent piece of property. However, the Planning Board may require the reservation of an easement for pedestrian traffic or utilities.
C.
Standards for street design. All streets shall be
designed and constructed to conform to the requirements set forth
in the following table.
|
Standards for Street Design
| |||
|---|---|---|---|
|
Standard
|
Minor Street
|
Collector Streetc
| |
|
Minimum width of right-of-way
|
60 feet
|
70 feet
| |
|
Minimum width of pavement
|
20 feet
|
24 feet
| |
|
Minimum radius of horizontal curvesa
|
150 feet
|
300 feet
| |
|
Minimum length of vertical curves
|
100 feet but in no case less than 20 feet for
each 1% difference of grade
|
200 feet but in no case less than 30 feet for
each 1% difference of grade
| |
|
Minimum length of tangents between curves
|
100 feet
|
200 feet
| |
|
Maximum grade
|
7%
|
6%
| |
|
Minimum grade
|
0.5%
|
0.5%
| |
|
Minimum sight distanceb
|
200 feet
|
300 feet
| |
|
Minimum shoulder width
|
4 feet
|
8 feet
| |
|
NOTES:
See Appendixes for Cross Section Details.[2]
| |||
|
aRadius of horizontal
curves shall be measured to the center line of the street.
| |||
|
bSight distance shall
be measured between two points along the center line of the street
on a straight line entirely within the street right-of-way and clean
of obstructions, one of the points to be at the surface of the street
and the other 3 1/2 feet above the surface.
| |||
|
cCollector streets
which do not service an area containing at least 150 dwelling units,
under ultimate area development, may be considered as minor streets
for purposes of design standards. The service area of a collector
includes those dwelling units on minor streets which feed into the
collector.
| |||
[2]
Editor's Note: Said appendixes are included
at the end of this chapter.
D.
Street intersections.
(1)
Intersections of arterial streets shall be held to
a minimum and spaced at least 1,000 feet apart, and intersections
of collector streets by other streets shall be at least 800 feet apart.
Between offset intersections there shall be a distance of at least
150 feet. Within 50 feet of an intersection streets shall be approximately
at right angles and in no case shall the angle of intersection be
less than 75º without additional channelization. Minimum edge
of pavement radii shall depend on the intersecting street types, and
shall be as follows:
(2)
Access streets into the subdivision from an arterial
street shall have minimum curb radii of 40 feet. All property corners
at street intersections shall be rounded with a radius of 20 feet,
or have comparable cutoffs or chords, as the Planning Board determines.
Within triangular areas formed by the intersecting street lines, for
a distance of 75 feet from their intersection, and the diagonals connecting
the end points of these lines, visibility for traffic safety shall
be provided, by exclusions of plantings or structures and regrading
as necessary.
(3)
Grades within the intersection shall not exceed 1%;
they shall not exceed 1 1/2% for a distance of 50 feet from the
intersection; from 50 to 100 feet, the grades shall not exceed 3%,
and in no case shall they exceed 7%.
(4)
Triangles, circles or other traffic channeling islands
may be required at intersections where present or anticipated traffic
conditions indicate their advisability for traffic control or safety.
E.
Street grading and shoulders. Areas within street
rights-of-way shall be graded as necessary to eliminate any slopes
steeper than one foot vertical in three feet of horizontal distance.
Street shoulders shall not exceed a slope of 10% at right angle to
the street center line. Street sections with concrete gutters shall
have grassed shoulders a minimum of six feet wide; grass swale sections
shall have shoulders with minimum of eight feet width, treated as
indicated on the Appendix Typical Road Section.[3]
[3]
Editor's Note: Said appendix is included at the end of this chapter.
F.
Sidewalks. Concrete sidewalks shall be provided in
any locations where they are deemed by the Planning Board to be an
appropriate and in the interest of public safety or convenience and
in accordance with the Typical Road Section. Particular attention
shall be given along existing or proposed collector streets within
walking distance of present or proposed schools, as well as in built-up
residential or commercial areas.
G.
Trees. The subdivider shall take adequate measures
to preserve desirable existing trees in suitable locations within
the subdivision. No trees, shrubs, or fences shall be placed in the
right-of-way. Occasionally existing trees of unusual value may be
preserved within the street right-of-way if approved by the Planning
Board.
H.
Monuments (see § 100-9 of Chapter 100, Subdivision of Land). Permanent survey monuments shall be set in the boundary of rights-of-way at intersecting streets, PC and PT of curves, though the PI of short curves may be used instead, where such is practical, at the discretion of the Engineer. Monuments shall be placed on one side of the street only and at only one corner of intersecting streets. Adjacent monumented points shall be intervisible.
(1)
Monument locations shall be shown on the subdivision
plat; field notes of ties to monuments or a tie sheet shall be submitted
to the Town Engineer after installation of monuments.
(2)
Monuments shall be of stone or concrete and not less
than four inches in diameter or square, and not less than 42 inches
long or from the top of underlying rock. Concrete monuments shall
be reinforced with steel rods, and a plug, brass plate, or pin shall
serve as the point of reference. If stone, a drilled hole shall serve
as the point of reference and a magnetic rod or other suitable metal
shall be placed adjacent to the monument to allow for recovery.
I.
Street improvements, general (see Appendix Details[4]). In addition to the required improvements specifically
referred to elsewhere in these regulations, subdivision plats shall
provide for all other customary elements of street construction and
utility service which may be appropriate in each locality as determined
by the Planning Board upon consultation with the Town Engineer. Such
elements may include, but shall not be limited to, street pavement,
gutters, stormwater inlets, manholes, curbs, sidewalks, streetlighting
standards, water mains, fire hydrants, fire alarm signal devices,
and sanitary sewers. Underground utilities within the street right-of-way
shall be located as required by the Town and/or the Town Engineer,
and underground service connections to the property line of each lot
shall be installed before the street is paved. All street improvements
and other construction features of the subdivision shall conform to
these specifications and shall be subject to approval as to design,
specifications, and construction by the Highway Superintendent and/or
the Town Engineer.
[4]
Editor's Note: Said appendix is included at the end of this chapter.
J.
Widening of existing street right-of-way. Where a
subdivision adjoins an existing street which does not conform to the
right-of-way standards given in the table entitled "Standards for
Street Design" in these regulations,[5] the subdivider shall dedicate whatever additional right-of-way
width is necessary to provide, on the subdivision side of the normal
street center line, a width which is equal to at least 1/2 of the
minimum standard width for the respective type of street.
L.
Temporary cul-de-sac. In areas where a temporary cul-de-sac
is proposed, the applicant shall provide sufficient, details on the
plan showing the road section, dimensions of the roadway and materials.
The cul-de-sac shall comply with materials shown on the Temporary
Cul-de-Sac Detail in the Appendix.[7] Applicant shall provide cost in the letter of credit to
cover the cost of the proposed temporary construction.
[7]
Editor's Note: Said appendix is included at the end of this chapter.
M.
Driveways. All driveways accessing Town roads shall
be paved with two inches of binder and one inch of top from the edge
of pavement to the right-of-way.
N.
Turnaround. In areas approved by the Highway Department
Superintendent, this design shall be used in regard to two- to three-lot
parcels with no future development only. The turnaround shall comply
with the design standards detailed in the Appendix.[8]
[Added 8-11-2004 by Res. No. 124]
[8]
Editor's Note: Said appendix is included at the end of this chapter.
A.
Particular attention should be given to storm drainage facilities. These facilities shall be designed to take the runoff from streets, lawns, paved areas, and roof areas. Full engineering attention shall be given to the interception and conveyance of stormwater by the street drainage system, a system of back-lot-line drainage swales, and main drainage channels through the subdivision. In general, the preservation of natural watercourses is preferable to the construction of drainage channels, and wherever practicable such natural watercourses should be preserved. Attention is called to the possibilities of using easements for natural watercourses to satisfy the open space requirements of "average density" developments under Chapter 125, Zoning, and Chapter 100, Subdivision of Land. Storm sewers and subdivision drainage facilities shall be based upon a design flow with a minimum return interval of 10 years. The design of natural watercourse channels shall depend upon the drainage area according to the following table.
|
Design Return Intervals for Natural Watercourses
| ||
|---|---|---|
|
Drainage Area
|
Recurrence Interval
| |
|
Above 20 square miles
|
100 years
| |
|
Between 4 and 20 square miles
|
50 years
| |
|
Between 4 and 1 square miles
|
25 years
| |
|
Less than 1 square mile
|
10 years
| |
B.
Storm drains and channels shall be designed and provided
to adequately convey the anticipated runoff from the development as
well as all future development upstream or uphill from the development
in question. However, the minimum size pipe used for storm drains
shall be twelve-inch diameter; except that catch basin crossovers
may be eight-inch pipe. The rainfall-intensity curve included herein
shall be used for computing anticipated rainfall. The coefficient
of runoff to be used is 0.4 minimum. Runoff within the development
shall be computed by the Rational Formula, using the "ten-year storm."
Design of major channels or piping systems conveying water through
the development shall be designed using the "twenty-five-year storm"
or greater, as appropriate. Time of concentration to first inlet shall
be calculated using the attached SCS nomograph unless otherwise determined
by the Town Engineer.
C.
Catch basins shall be spaced at intervals of not over
300 feet, at low points, and at intersections. They shall conform
with the detailed drawings included herein.[1] Drains shall be designed with straight-line grade and
alignment between manholes. Manholes shall be placed at intervals
of approximately 300 feet maximum. Sufficient grade shall be provided
to prevent settling of grit insofar as practicable.
[1]
Editor's Note: Said drawings are included
at the end of this chapter.
D.
Manhole tops shall be accurately designed to conform
with finished grade.
F.
On main drainageways the Town encourages the use of
natural open channels rather than large diameter piped systems, subject
to:
G.
Developer and his engineer shall be responsible for
furnishing, as part of their plans to be presented before the Planning
Board, full and sufficient details of all hydraulic structures. This
includes, but is not limited to, cross sections of drainage channels,
details of head wall construction, erosion control structures, special
manholes, and all such other items as may be necessary to establish
fully the methods and materials to be followed in construction.
H.
Developer and his engineer shall so design the vertical
control of their subdivision that surcharge of storm drainage systems
will not cause a backup or flooding of cellars. This will normally
require that cellar drains not be connected to the storm drainage
system unless:
I.
In the design of storm drainage piping system an "N"
of 0.013 shall be used for smooth pipe and an "N" of 0.024 shall be
used for corrugated metal pipe, unless the corrugated metal pipe is
of the "smooth-flo" type. In this case an "N" of 0.013 may be used.
J.
All three-way manholes shall be five feet in diameter
or greater depending on size of pipe.
K.
The invert of a three-way manhole will have a minimum
radius equal to 1/2 the diameter of the manhole. No "T" intersections
will be acceptable.
L.
Storm drains conveying drainage along side lot lines
shall extend to the rear lot line or to the main channel to which
the drain is discharging.
M.
In order to maintain structural strength, drainage
inlet structures (catch basins) shall not contain more than two main
stormwater conduits. (Four-inch weep drains are not considered main
conduits.)
N.
On certain projects there may be key elevations which
must be adhered to, as determined by the Town Engineer. These key
elevations may be finished floor, lowest architectural opening or
basement floor elevations. Developer's engineer shall certify these
key elevations in writing, prior to the issuance of a certificate
of occupancy.
O.
Road catch basin location. Catch basins within gutters
shall be placed with the intent that they do not lie within the vehicular
traffic area of drives and/or roadways.
A.
In order to ensure that the surrounding land and watercourses
will not be subjected to siltation or erosion, the Planning Board
may require the developer to follow certain erosion control practices.
The developer shall consult with the Town Engineer to determine whether
such procedures are required. Such procedures may include:
(1)
Installing and maintaining temporary sedimentation
basins at the point or points of stormwater discharge from the property.
(2)
Exposing the smallest practical area of land at any
one time during development.
(3)
Provision for temporary vegetation and/or mulching
to protect critical areas.
(4)
Provision for adequate drainage facilities to accommodate
effectively the increased runoff caused by changed soil and surface
conditions during and after development. The developer's engineer
shall show, as part of the submitted plans, the interceptor swales
and sedimentation basins along the lower edges of all developments.
Significant topographic data and design grades for the swales shall
be shown on the plans.
(5)
Fitting of the development plan to the topography
and soils so as to minimize the erosion potential.
(6)
Retention and protection of natural vegetation wherever
possible.
(7)
Installation of permanent final vegetation and structures
as soon as practicable.
(8)
Provision of adequate protective measures when slopes
in excess of 10% area graded; and minimizing such steep grading.
(9)
Prohibition of stripping of existing ground cover
until interceptor swales and sediment sinks have been installed by
the developer and approved by the Town.
(10)
Requirement that the developer shall routinely
"muck-out" sediment sinks and interceptor swales, to provide full
capacity.
B.
No excess topsoil or subsoil shall be removed from
the site unless approved by the Planning Board.
A.
Flood hazard prevention shall include the control
of 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 roadway above the observed, anticipated, or
computed water levels of storm sewers, streams, channels, floodplains,
detention basins and swales.
B.
Particular attention shall be paid to development
in the vicinity of Honeoye Creek and its floodplain, and no alteration
of the existing characteristics of the areas shall take place without
the specific approval of the Town as to the adequacy of the protective
measures taken, if any, and the effects of such development on upstream
and downstream reaches of the watercourse and adjacent properties.
C.
All development proposed within the special flood
hazard area as defined by the Federal Insurance Administration shall
comply with the various regulations set forth by the Federal Insurance
Administrator, when applicable.
A.
The Town has determined that stormwater detention
basins will be required in certain areas because continual upstream
development tends to overtax both downstream natural watercourses
and man-made drainage facilities. In addition, increased rates of
stormwater runoff cause environmental problems downstream such as
highly erosive velocities, flooding and overtopping of the banks.
Consequently it has been determined advisable to insist upon detention
basins where appropriate and to have these detention basins designed
in a manner compatible with the particular problem.
B.
While the Town reserves the right to establish particular
parameters in each individual instance, the general philosophy is
to permit runoff from any particular development of a rate no more
than would normally occur under a natural, undeveloped condition for
the particular design storm. That is, the Town generally agrees that
property owners along the downstream channel should be prepared to
accept a rate of discharge from the upstream areas equivalent to the
discharge from the upstream area under a natural, or agricultural
conditions.
C.
It should be pointed out, however, that the Town definitely
reserves the right to establish other more restrictive parameters.
For example, if the downstream area has been subjected to floods in
the past, even while the upstream areas were not developed, and if
the Town deems it desirable and appropriate to remedy this situation,
it may, at its discretion, require an impoundment area of a size and
type, as well as storm sewers and culverts, which can assist in rectifying
the downstream flooding situation.
D.
Parameters or rules regarding stormwater discharge
are simply stated below:
(1)
No developed area shall discharge stormwater
into adjacent culverts and channels at a rate greater than what occurs
under a natural undeveloped condition.
(2)
The flow capacity of channels and culverts immediately
downstream from a development does not necessarily govern the adequacy
of the total drainage system downstream.
(a)
Proceeding downstream in any given drainage
basin, (and therefore from any given development) the area contributing
to any drainage channel is increasing.
(b)
Culverts and channels downstream from a development
may be able to handle the total runoff from that development alone,
but this does not imply that said channels and culverts can handle
the total runoff to that location.
(3)
The fact that downstream facilities are inadequate
prior to development and, therefore, flood at certain times does not
imply that increasing the frequency at which they will flood by allowing
additional runoff from a development is desirable.
E.
Engineering procedures. In order to arrive at an engineering
estimate of storm flows and proposed retention pond size, the Engineer
must proceed according to the following steps:
(1)
Determine the design storm recurrence (i.e., 10 years, 25 years, 50 years, etc.) in accordance with § A125-7 of these regulations.
(2)
Using topographic maps and the appropriate charts
and graphs, determine the maximum expected natural rate of runoff
for the design storm. Factors affecting this number include slope
of land, surface cover, area of drainage basin, and the presence or
lack of well defined natural channels. This number places a ceiling
on the allowable discharge from any development in the area under
question for the given design storm.
(3)
Design the collection system using the standard
Rational Method (C = 0.4).
F.
(Engineering procedures). Based on an analysis of
a number of watershed models, the following simplified method for
sizing stormwater detention facilities is presented. In no way is
this method intended to deter the design engineer from performing
the rigorous hydrologic and hydraulic analyses previously required
if he so desires. Rather, this is intended to simplify the engineering
calculations while achieving the same results. Should the design engineer
wish to utilize reservoir routing techniques, the SCS Hydrograph Method
shall be the standard. Computations shall be based on twenty-four-hour
duration rainfall as supplied by the US Weather Bureau.
(1)
Provide volume for two-year twenty-four-hour
rainfall at top of riser, as follows:
(b)
[1]
Subsection F(1)(a)[1] above times 0.0283.
[2]
Subsection F(1)(a)[2] above times 0.0525.
[3]
Subsection F(1)(a)[3] above times 0.1408.
(c)
Required storage for off-site area may be reduced
if off-site areas have existing detention ponds by:
[1]
Volume of off-site pond (with riser) at top
of riser to maximum depth of four feet (without reservoir routing).
[2]
Volume of off-site pond (without riser) at HW
necessary to pass 15 cfs through outlet of said pond, to maximum depth
of four feet (without reservoir routing).
[3]
The minimum volume required for detention (AF)
to serve off-site tributary areas shall be (0.0283) times offsite
area (Ac).
(2)
All ponds shall have trickle tube risers, (minimum
diameter of 36 inches) designed as follows:
(a)
Two feet minimum height, four feet maximum height.
(b)
Top of riser to be at least as high as outflow
pipes, up to maximum of four feet.
(c)
10-inch inflow pipe, inv - pond bottom.
(d)
No other opening to MW depth of two feet.
(e)
Two feet to three feet, provide four orifice
openings, as shown in the Appendix.[1]
[1]
Editor's Note: Said appendix is included at the end of this chapter.
(g)
Antivortex device.
(h)
Trash rack.
(3)
Outflow pipe to pass Q10 existing, unless determined otherwise by the Town. Use the smallest
pipe that will pass flow with HW/D greater than or equal to one; minimum
size to be 12 inches diameter.
(4)
Emergency spillway crest, one foot above HW
required to pass Q10 existing or a minimum
of one foot above crown of outfall pipe, or one foot minimum above
top of riser, which ever gives greatest HW from outfall invert to
spillway.
(5)
Emergency spillway to pass Q25 developed when flowing one foot deep based on Q = 3.67 LH.
(6)
Top of dam two feet above emergency spillway
crest.
(7)
Unusual topographic conditions may warrant changes
from the pond geometry and discharge structure configuration as outlined
above. Where the design engineer feels that those changes are justified,
he should contact the Town Engineer for approval prior to final design.
(8)
In an outlet which discharges water as a continuous
function of head is used, lesser storms should discharge approximately
proportional lesser flows.
G.
Plan details shall show \the pond location, size of
inlet and outlet structures and adequate safety features, such as
fencing, etc.
H.
The developer's engineer shall submit, with his final
plans, drainage calculations justifying the size of pipes, channels,
impoundment basins and related structures.
I.
In the design procedure the developer's engineer's
attention is also directed to the stream flow data provided in the
1967 Town of Rush Master Plan.
J.
Detention pond facilities are to be designed and built
to standards discussed with, and approved by, the Town and its Engineer.
Attention shall be given to providing facilities which are aesthetically
pleasing, of a permanent nature, safe, and requiring minimum maintenance.
K.
The developer is responsible for providing and transferring
to the Town permanent easements of a location and type adequate to
encompass and to service and maintain the facilities. Such easements
are to be approved by the Town Board prior to final subdivision approval.
A.
The developer shall take all necessary measures to
control dust resulting from his operations and to prevent spillage
of excavated material on public roads. When directed by the Town Building
Inspector, the developer shall apply calcium chloride and/or water
where directed and in such quantities and at such frequencies as may
be required to control such dust and prevent it from becoming a nuisance
to the surrounding area.
B.
An amount of money shall be provided in the letter
of credit to reasonably cover the cost of dust control during the
life of the project, the amount to be approved by the Town. It is
the responsibility of the developer to assure that he and his subcontractors
keep adjoining streets and highways free of mud, soil and other foreign
debris to avoid nuisance or hazard to vehicular and pedestrian traffic.
An amount of money shall be provided in the letter of credit to assure
compliance, the amount to be approved by the Town.
Sanitary sewage collection and treatment facilities
currently are not available in the Town of Rush. Consequently developers
must be prepared to justify the use of subsurface disposal facilities.
They shall meet the approval of the County Health Department, the
State Departments of Health, Environmental Conservation and the Town.
A.
Water systems shall be designed to provide adequate
fire protection and domestic service. Design and construction shall
be subject to Town approval.
B.
Design and construction of individual private wells
shall be subject to review and approval by the County Health Department.
C.
Water mains. Wherever possible consideration shall
be given to the construction of water mains in lieu of private wells.
D.
While planning is in the preliminary stage the developer
shall consult with the Town and its Engineer on the matter of sizing
mains, hydrant and valve location, construction of loops to prevent
dead ends and larger-than-minimum size mains to provide for future
extension of service.
F.
The criterion of design will normally be that pipes
shall be sized to obtain the required fire flow at the critical point
in the development while satisfying the average daytime domestic draft.
G.
Generally, the Insurance Service Office "Guide For
Determination of Required Fire Flow" shall be used in calculating
these required protective flows.
A.
Finished ground level adjacent to house foundation
walls shall be a minimum one foot zero inches higher than the edge
of pavement for standard subdivision development. In one- or two-lot
developments where front lot setbacks exceed 150 feet and/or where
natural drainage characteristics would be better utilized by draining
away from the street, this requirement may be waived. In any case,
provisions shall be made for draining positively the surface of each
lot by proper grading and the construction of swales, ditches, or
drains. These items shall receive the same careful design attention
as the street drainage system.
B.
Provisions shall be made for disposing of roof and
cellar drainage into the street drainage system. The developer and
his engineer, however, must design and provide that cellar floors
will be at an elevation higher than the pavement to permit the street
drainage system to run fully surcharged without causing backup or
flooding in the cellars. In lieu of this, the developer may provide
(and so indicate or state on his plans) that cellars shall be drained
with sump pumps and appropriate check valves.
C.
In special conditions, where topography permits or
dictates, cellar drainage may be conveyed to main drainage swales
where it can be deposited if no nuisance will be caused or created
to abutting or downstream property owners. In such instances the cellar
floor shall be so designed as to be above the level of the project
design flood to assure no backup or flooding of the cellar.
D.
Dry wells for disposing roof drainage may be used
where storm sewers are not available. The developer shall size the
facility using minimum ten-year storm.
E.
No laundry, sanitary, or kitchen wastes shall be discharged
to a storm drainage system. Further, no drain connections from garages
or driveways shall be permitted to enter drainage swales where soap
suds and detergents from car washing operations could cause a nuisance
to abutting or downstream property owners.
A.
All design of pipe lines for storm drains shall be
based on the earth loading occurring at the transition width. Designers
shall assume a Class C bedding (load factor 1.5) and safety factor
of 1.5 in their design calculations (except for R.C.P. = 1.0). Specifications
for construction shall stipulate a granular bedding (Class C) as indicated
on page 212 of the WPCF Manual of Practice No. 1, "Design and Construction
of Sanitary and Storm Sewers, 1969 Edition." The granular bedding
shall be No. 1 and No. 2 (approximately a fifty-fifty mixture) crushed
stone as specified in the New York State Department of Transportation
specification for M4 coarse aggregates. Also, unless substantiated
by test results, the designer shall assume the following:
|
W = 120 lb. per cu. ft.
KU = Ku feet = 0.13 (curve D, page 189 WPCF
Manual)
rsdp = 0.5 @ Ku - Ku feet = 0.165 (page 191,
WPCF Manual)
|
B.
Shaped trench bottoms will not be permitted.
A.
It shall be the responsibility of the developer to
furnish easements to the Town, as required, for the installation and
permanent operation of drains, sewers, mains or access roads where
required.
B.
These easements shall be prepared prior to the approval
of the details plan. Developer bears the responsibility for preparation
of the easement maps and assuring their transfer to the Town and recording
in the County Clerk's office.
C.
The Town reserves the right to require easements for
anticipated future utilities where in the opinion of the Town Board
and/or Town Engineer such easements are justified by the estimated
rate of growth of the area in question.
D.
The Town encourages the preservation of natural stream
corridors through the use of natural stream preservation corridor
easements and may require their utilization in any particular development.
E.
Easements are to be 30 feet wide unless otherwise
specified.
