These design standards are a guide to development
so that Alpha Borough will in the future be a coordinated, well-planned
community of good quality, with provision for desirable services and
circulation facilities. The applicant shall observe the following
requirements and principles of land subdivision in the design of each
subdivision or portion thereof:
A.Â
Development pattern. The subdivision plat shall conform
to design standards that will encourage good development patterns
within the Borough.
B.Â
Conformance to Master Plan and Official Map. The subdivision
shall conform to the proposals and conditions set forth in either
the Official Map or Master Plan. The streets, drainage rights-of-way,
school sites, public parks and playgrounds shown on an officially
adopted Master Plan or Official Map shall be considered in the approval
of subdivision plats.
C.Â
Land reserved from subdivision shall be a useful dimension
for development in the future in accordance with current zoning.
D.Â
Subdivision designs shall indicate consideration for
suitable protection of different types of land uses and the segregation
of vehicular and pedestrian traffic incompatible with particular uses.
E.Â
Sites as designated in the Master Plan or on the Official
Map shall be provided for public and semipublic land uses such as
schools, firehouses, recreation sites and other community uses as
provided in N.J.S.A. 40:55D-44.
A.Â
The street and highway layout shall conform to the
Master Plan and the Official Map and shall provide appropriately located
street taps or stub streets to adjacent areas. The arrangement of
streets not shown on the Master Plan or Official Map shall be such
as to provide for the appropriate extension of existing streets.
B.Â
Minor streets.
(1)Â
The street pattern within a subdivision shall be orderly
and shall be reflective of the established street pattern within the
Borough.
(2)Â
Minor streets shall be so designed as to discourage
through traffic. Particular attention should be given to eliminating
possible bypasses around traffic signals and major intersections.
C.Â
Marginal access streets. In subdivisions that abut
arterial streets and such other streets or portions of streets as
the Planning Board may designate on the Master Plan, the Planning
Board may require provision for marginal access roads, reverse-frontage
lots with buffer strips for planting or other design methods for the
purpose of separating through and local traffic.
D.Â
Right-of-way width. The right-of-way width shall be
measured from lot line to lot line and shall not be less than 50 feet
unless a greater width is shown on the Master Plan or Official Map.
E.Â
No subdivision showing reserve strips controlling
access to streets shall be approved except where the control and disposal
of land comprising such strips has been placed in the governing body
under conditions approved by the Planning Board.
F.Â
Subdivisions that adjoin or include existing streets
that do not conform to widths as shown on the Master Plan or Official
Map or the street width requirements of this chapter shall dedicate
additional width along either one or both sides of said road. If the
subdivision is along one side only, 1/2 of the required extra width
shall be dedicated.
G.Â
No street shall have a name which will duplicate or
so nearly duplicate another as to be confused with the names of existing
streets. The continuation of an existing street shall have the same
name.
H.Â
Geometric design standards.
(1)Â
Horizontal.
(a)Â
Street intersections shall be as nearly at right
angles as possible, and in no case shall be less than 60º.
(b)Â
Curb returns shall be provided at all intersections
with a curve having a radius of not less than 25 feet.
(c)Â
Street jogs with center-line offsets of less
than 125 feet shall be prohibited.
(d)Â
A tangent at least 100 feet long shall be introduced
between reverse curves on arterial and collector streets.
(e)Â
When connecting street center lines deflect
from each other, they shall be connected by a curve with a radius
of not less than 250 feet for minor streets and 500 feet for arterial
and collector streets.
(2)Â
Vertical.
(a)Â
Street grades. Street grades shall not exceed
a maximum of 8% or a minimum of 1/2 of 1%. The maximum grade may be
exceeded for a tangent length of 200 feet by 2%.
(b)Â
Maximum grade within 100 feet (measured from
near side curbline) of an intersection of 4%.
(c)Â
All changes in grade, including that at intersections,
shall be connected by vertical curves of sufficient length to provide
a smooth transition and proper sight distance. The length (l) in feet
of a vertical curve shall be related to the algebraic difference in
the percent of grade (A) and a constant according to the following
formula:
                      L
= KA
| |
The minimum "K" values shall be as follows:
|
Street Class
|
Crest Curve
|
Sag Curve
| |
---|---|---|---|
Major collector
|
145
|
100
| |
Minor collector
|
65
|
60
| |
Minor street
|
28
|
35
| |
Intersection (stop conditions)
(Rounded by PC/PT of curb returns)
|
3
|
3
|
(d)Â
Stopping sign distances shall be at least: (Based
on height of driver's eye of 3.50 feet above road surface. Height
of object 0.5 feet above road surface for roadways and 4.25 feet for
intersections.)
Street Class
|
Sight Distance
(feet)
| |
---|---|---|
Major collector
|
350
| |
Minor collector
|
275
| |
Local
|
200
|
I.Â
Required curbing and construction types for street
improvements. Curbing and construction types for street improvements
shall be in accordance with the following requirements:
(1)Â
Pavement construction shall conform with Chapter 346, Streets and Sidewalks, of the Alpha Borough Code.
(2)Â
Curb and sidewalk construction shall conform with Chapter 346, Streets and Sidewalks, of the Alpha Borough Code.
(3)Â
These provisions shall be considered minimum requirements
generally consistent with the public welfare, and the Borough Engineer
shall modify or extend these provisions in appropriate cases as may
be deemed necessary for the public good.
J.Â
General street improvements.
(1)Â
Street signs. Street name signs shall be placed at
all street intersections within the subdivision. Such signs shall
be of a type approved by the Borough of Alpha and shall be placed
in accordance with the standards of the Borough of Alpha.
(2)Â
Street trees.
(a)Â
Street trees shall be provided in all subdivisions.
(b)Â
Trees shall be of nursery stock of an approved
species, grown under the same climatic conditions as at the location
of the development. They shall be of symmetrical growth, free of insects,
pests and disease, suitable for street use and durable under the maintenance
contemplated.
(c)Â
The average trunk diameter measured at a height
of six feet above the finished grade level shall be a minimum of two
to three inches, depending on good practice, with reference to the
particular species to be planted.
(d)Â
Trees shall be planted at intervals of from
40 to 60 feet apart (depending upon the species) along both sides
of the street and at least 1.5 feet from any sidewalk, curb, gutter
or other right-of-way improvement as provided for in this regulation,
whether such improvement is proposed to be built or not.
(e)Â
All planting shall be done within street right-of-way
shall be finish-graded, properly prepared and seeded or sodded with
lawn grass in conformance with good nursery and landscape practice.
(3)Â
Planting strips. All planting strips within street
right-of-way shall be finish-graded, properly prepared and seeded
or sodded with lawn grass in conformance with good nursery and landscape
practice.
(4)Â
Shade trees.
(a)Â
Shade trees shall be provided in all subdivisions.
(b)Â
Trees shall be of nursery stock of an approved
species grown under the same climatic conditions as the location of
the development. They shall be of symmetrical growth, free of insects,
pests and disease, suitable for residential use and durable under
the maintenance contemplated.
(c)Â
The average trunk diameter measured at the height
of six feet above finished grade level shall be a minimum of one to
two inches, depending on good practice, with reference to the particular
species to be planted.
(d)Â
Trees shall be planted on each residential lot
at the rate of one tree for each 5,000 square feet of lot area or
recreation space, provided that this requirement may be reduced by
the number of existing trees retained in good condition on the lot,
except that trees within tree rows along the periphery of the lots
or tract shall not be included in this determination.
(5)Â
Monuments shall be of the size and shape required
by N.J.S.A. 46:23-9.9 et seq. (Map Filing Law) and shall be placed
in accordance with said statute.
(6)Â
Topsoil which shall be removed in the course of regrading
a subdivision shall not be used as spoil or removed from the subdivision
site. Such topsoil shall be redistributed so as to provide at least
six inches of cover on areas to be used as building sites from which
topsoil was removed and shall be stabilized by seeding or planting.
A.Â
Block length and width or acreage within bounding
roads shall be such as to provide for convenient access, circulation
control and safety of street traffic. The desirable maximum length
shall be 1,000 feet.
B.Â
In instances where it is deemed by the Planning Board
to allow blocks over 1,000 feet long, pedestrian walks may be required
in locations deemed necessary by the Planning Board.
C.Â
For commercial, group housing or industrial use, block
size shall be sufficient to meet all area and yard requirements for
such use.
D.Â
Minimum block width shall relate to the zoning district
requirements for lot sizes and yards, and generally shall provide
for two tiers of lots.
E.Â
Culs-de-sac.
(1)Â
Culs-de-sac shall not be longer than 600 feet or a
length which is adequate to accommodate 15 lots, whichever is less.
(2)Â
There shall be a turnaround provided at the end with
a minimum right-of-way radius of 60 feet and a minimum curb radius
of not less than 50 feet which shall be centered about the roadway
center line.
(3)Â
If a cul-de-sac is of a temporary nature, a similar
turnaround shall be provided and provisions made for future extension
of the street and reversion of the excess right-of-way to the adjoining
properties.
B.Â
Insofar as is practical, side lot lines shall be at
right angles to straight streets and radial to curved streets.
C.Â
Each lot must front upon and be capable of having
access to an approved street at least 50 feet in width.
D.Â
Where extra right-of-way width has been dedicated
for widening of existing streets, lots shall begin at dedicated right-of-way
line, and all setbacks shall be measured from such line.
A.Â
Easements of a width sufficient to allow proper maintenance
shall be provided for the installation of all drains, storm drains,
pipelines, gas mains, etc. Said easements shall be dedicated to the
municipality by approved legal procedure. Easements of a width sufficient
to allow proper maintenance shall be provided for the installation
of all drains, storm drains, pipelines, gas mains, etc. Said easements
shall be dedicated to the municipality by approved legal procedure.
Easements along rear property lines or elsewhere for utility installation
may be required; such easements shall be at least 20 feet wide for
a single utility plus an additional five feet for each additional
utility. They shall be located in consultation with the companies
or municipal departments concerned.
B.Â
Where a subdivision is traversed by a watercourse,
drainageway, channel or street, there shall be provided a stormwater
easement or drainage right-of-way conforming substantially with the
stream encroachment lines of such watercourse and such further width
or construction, or both, as will be adequate for the purpose.
C.Â
Natural features such as trees, brooks, hilltops and
views shall be preserved whenever possible in designing any subdivision
containing such features.
A.Â
Grading and drainage system plan.
(1)Â
A preliminary grading and drainage system plan shall
be a part of the preliminary plat. It shall indicate in general terms
a proposal for an adequate system of drainage structures to carry
off and store or discharge the stormwater runoff and natural drainage
water which originates not only within the property boundaries, but
also that which originates beyond the property boundaries. It should
perpetuate existing drainage patterns.
(2)Â
The public improvement and utilities plan and profiles
shall show the final drainage plan, site grading and street profiles.
(3)Â
No stormwater runoff or natural drainage water shall
be so diverted as to overload existing drainage systems or create
flooding or the need for additional drainage structures on other private
properties or public lands without proper and approved provisions
being made for taking care of these conditions. Watersheds with drainage
areas over 1/2 square mile come under the jurisdiction of the New
Jersey Department of Environmental Protection. Approval of this agency
must be secured for any culvert or bridge crossing falling into this
category. Copies of any correspondence with the Department of Environmental
Protection shall be supplied to the Borough Engineer.
B.Â
Collection system.
(1)Â
The quantities of water for which the collection system
shall be designed shall be in accordance with the Rational Method
of design using the following formula:
Q = CIA
| |||
Where:
| |||
"Q" is the required capacity, in cubic feet
per second, for the collection system at the point of design.
| |||
"A" is the tributary drainage area, in acres,
and shall include areas tributary from outside sources as well as
from within the site itself.
| |||
"C" is the coefficient of runoff applicable
to the drainage area and shall be based on consideration of soil conditions,
average slope of the drainage area and degree of ultimate development
of the area, but in no case shall be less than the following coefficients:
|
Topography
| |||||
---|---|---|---|---|---|
Usage
|
Density
(units per acre)
|
Flat
(0%-10%)
|
Rolling
(10%-20%)
|
Hilly
(Over 20%)
| |
Residential
| |||||
High-density
|
4-6
|
0.50 (0.40)
|
0.55 (0.45)
|
0.60 (0.55)
| |
Medium-density
|
1-4
|
0.45 (0.35)
|
0.50 (0.40)
|
0.55 (0.50)
| |
Low-density
|
Fewer than 1
|
0.40 (0.30)
|
0.45 (0.35)
|
0.50 (0.45)
| |
Impervious surfaces
|
0.90
|
0.90
|
0.90
| ||
Undeveloped woodland
|
0.30 (0.20)
|
0.35 (0.25)
|
0.50 (0.45)
| ||
Pasture and grassed areas
|
0.30 (0.20)
|
0.36 (0.20)
|
0.42 (0.37)
| ||
Cultivated fields
|
0.50 (0.50)
|
0.60 (0.50)
|
0.72 (0.62)
|
The above runoff coefficients assume that clay
soils (sand gravel soils coefficients indicated in parenthesis) are
present. For residential uses, the coefficients assume that paved
areas (parking) have been provided. Any deviation from these factors
would result in an adjustment in "C" values. Determination of nonlisted
uses shall be a subject of special study and approved by the Borough
Engineer.
| |
"I" is the rainfall intensity, in inches per
hour, and shall be determined from the graph entitled "Rainfall Intensity
Duration for Essex and Union Counties," copies of which are on file
with the Borough Clerk and which is made a part hereof. The minimum
time of concentration shall be 10 minutes, which shall be used as
the initial T, for all roadway drainage systems.
|
(2)Â
The following intensities shall be used to determine
"Q."
(a)Â
Systems carrying roadway drainage: 10 years.
(b)Â
Cross pipes or culverts carrying runoff from
one side of the roadway to the other (except cross pipes conveying
runoff from a single inlet): 25 years; tributary areas over 20 acres:
50 years.
(c)Â
At low points and cuts from which water cannot
escape without overflowing the roadway: 25 years.
(3)Â
Pipes or conduits shall be designed using Manning's
equation for velocity:
"R" is the hydraulic radius of the conduit flowing
full.
| ||
"n" is Manning's roughness coefficient, which
shall be as follows:
|
Concrete pipe
|
0.012
| ||
Corrugated metal, 2Â 2/3 x 1/2 inches corrugations
| |||
Plain or fully coated
Paved invert
Fully paved
|
0.024
0.020
0.012
| ||
3 x 1 inches corrugation
|
0.027
| ||
6 x 2 inches corrugation (field bolted)
|
0.032
| ||
"n" for other materials shall be as recommended
by the Borough Engineer.
| |||
"S" is the slope of the energy gradient, in
feet per foot, and shall generally be considered as being the same
as the slope of the invert of the pipe (S0);
however, such slopes shall be checked against the available hydraulic
gradient whenever the system flows full or where the system discharges
into a body of water.
|
(4)Â
Velocity.
(a)Â
Wherever possible to ensure a self-cleansing
velocity, pipes shall be placed on grades that will provide a minimum
velocity of three feet per second when flowing 1/4 full. The following
table indicates minimum grades to accomplish this:
Desirable Minimum Gradients for Concrete
Pipe
| ||
---|---|---|
Diameter
(inches)
|
Slope N=0.012
| |
15 (minimum permissible)
|
.008
| |
18
|
.006
| |
24
|
.005
| |
30
|
.004
| |
36
|
.003
| |
42
|
.002
| |
48
|
.0016
| |
54
|
.0014
| |
60
|
.0012
| |
66
|
.0011
|
(b)Â
Where steep grades are encountered, full-flow
velocities over 15 feet per second should be avoided by the use of
drop manholes or inlets in the line.
(5)Â
Alignment.
(a)Â
Manholes or inlets shall be provided in drain
lines not more than 350 feet apart and wherever branches are connected
or sizes are changed and wherever there is a change in alignment or
grade.
(b)Â
Alignment of pipes shall be in a straight line
between manholes or inlets, except that radius pipe may be used in
pipes over 60 inches in diameter, provided that a manhole or inlet
is incorporated at not more than five-hundred-foot intervals.
(6)Â
Inlet spacing and headwalls.
(a)Â
Inlet spacing shall be such as to permit a spread
of water to the edge of the traveled way (edge of shoulder for rural
roads or edge or parking lane (eight feet maximum) for urban roads)
during a storm with an intensity of three inches per hour. Inlet spacing
may vary up to 350 feet, depending on the contributory drainage area
and the longitudinal and cross slopes of the roadway. Inlets at intersections
shall be located to intercept water before it crosses the intersection
or crosswalk area, and inlets shall not be placed in the crosswalk
area. Pairs of inlets shall be placed at low points.
(b)Â
Inlets intercepting swales or in parking areas
shall be designed such that not more than six inches (three inches
in parking areas) shall pond over an inlet during a storm with an
intensity of three inches per hour.
(c)Â
Pipelines starting or ending in ditches, streams
or other bodies of water shall terminate with either a headwall or
a flared end section. Riprap or other suitable material shall be provided
to prevent erosion.
(7)Â
Open channel flow. Where brooks, ditches, swales or
other channel flows are used, they shall be designed by the use of
Manning's equation, as indicated for collection systems above, with
the following considerations:
(a)Â
The friction factor (n) shall be:
Unlined
| |||
Earth, uniform section
|
0.018 - 0.027
| ||
Earth, nonuniform section
|
0.025 - 0.040
| ||
Earth, not maintained
|
0.080 - 0.012
|
Lined
| |||
Concrete
| |||
Finished
|
0.015
| ||
Rough
|
0.25
| ||
Riprap
|
0.35
|
(b)Â
Design velocities should be limited to a nonerosive
velocity and shall be determined based on an analysis of the soil
conditions, but in any case shall not exceed the following:
Materials
|
Velocity
(feet per second)
| |
---|---|---|
Fine sand to fine loam
|
2.5 to 3.5
| |
Stiff clay to hardpan
|
3.75 to 6.00
| |
Concrete-lined ditch
|
15
|
Velocities shall be controlled by use of check
dams or baffles where necessary.
|
(c)Â
A ditch or brook right-of-way of sufficient
minimum width to include a ten-foot access strip in addition to the
width of the ditch or brook from bank top to bank top shall be offered
for dedication to the Borough for drainage purposes. Such right-of-way
shall be shown on the drainage plan and on the final plat.
(d)Â
Swales shall be provided in residential areas
so that an area not in excess of the minimum lot area in the subdivision
shall drain without being intercepted. This requirement may be varied
for wooded sites or pervious soils.
(e)Â
Swales shall be provided in other areas so that
not more than one impervious acre shall drain without being intercepted.
(f)Â
Jute mesh slope protection or CurlexTM shall be used in swales or grassed ditches. Paved
ditches shall be used where the velocity exceeds the erosive velocity.
(g)Â
Side slopes for a drainage way shall be as follows:
Facility
|
Maximum Side Slope
| |
---|---|---|
Channel
|
2:1
| |
Ditch
|
4:1
| |
Swale
|
6:1
|
(8)Â
Minimum cover and structural considerations.
(a)Â
All pipe shall be concrete, unless specific
unique design considerations exist for the use of other types of materials,
and then only with the approval of the Borough Engineer.
(b)Â
Minimum cover for reinforced concrete pipe shall
be based upon a depth of cover of two feet from the top of the pavement
to the top of the pipe.
(c)Â
Minimum cover for corrugated metal pipe shall
be based upon a depth of cover of one foot from the top of the pipe
to the top of the pavement or upon the manufacturer's recommendations,
whichever is greater.
(d)Â
Maximum cover for pipe shall be based on rational
analysis through use of Marston's formula. For reference, see the
booklet Reinforced Concrete Pipe Culverts, issued by the United States
Department of Commerce, and manufacturer's recommendations for flexible
pipe.
(e)Â
Standard strength reinforced concrete pipe shall
conform to Class 3, Wall B, and extra strength reinforced concrete
pipe shall conform to Class 4, Wall B, of ASTM Specifications C-76
of AASHO Designation M-170. Strengths for corrugated metal pipe shall
be as required by the New Jersey Department of Transportation Standard
Specifications, current edition and amendments.
(f)Â
Box culverts shall be designed in accordance
with AASHO recommendations.
C.Â
Stormwater management.[1]
[Amended 5-9-2006 by Ord. No. 06-03]
(1)Â
Submission of plan required. For all new construction for which a building permit is required, as well as for all soil removal for which a soil removal permit is required, within the Borough of Alpha, a storm water management plan must be submitted to the Borough Engineer for review and approval as provided for in Subsection C(4) prior to any commencement of construction.
(2)Â
Contents of plan. Every stormwater management plan
submitted to the Borough Engineer shall include the following data:
(a)Â
The name and address of the applicant.
(b)Â
The lot and block numbers of the site as shown
on the current Borough Tax Map.
(c)Â
The location of the site within the watershed(s)
as shown on a topographic map.
(d)Â
The location and description of significant
natural and man-made features on and surrounding the site, including
topography, steep slopes, all impervious surfaces, soil and drainage
characteristics and presently existing stormwater runoff control devices,
mechanisms or areas.
(e)Â
The size of the nearest culvert or storm sewer
downstream of the discharge area and the proposed stormwater discharge
from the site.
(f)Â
The location and description of any proposed
changes to the site, whether of a permanent or temporary nature, with
particular attention to impervious surfaces and interception of presently
dispersed flow which may affect the capacity of the soil, vegetative
cover and drainage ways to absorb, retard, contain or control stormwater
runoff.
(g)Â
The designation of critical or other areas to
be left undisturbed, shown in sufficient detail to be accurately marked
and identified on the land.
(h)Â
The approximate computation of the total stormwater
runoff before and after the disturbance of land and/or construction
of impervious surfaces.
(i)Â
Any proposed temporary and permanent stormwater
management measures.
(3)Â
General guidelines. The stormwater management plan
shall adhere to the following general principles:
(a)Â
The rate and velocity from the site following
completion of the planned development shall not exceed that which
occurred in previous undisturbed ground cover.
(b)Â
Maximum use shall be made of presently existing
stormwater runoff control devices, mechanisms or areas, such as existing
berms, terraces, grass waterways, favorable hydrologic soils, swamps,
swales, watercourses, woodlands and floodplains, as well as any proposed
retention structures.
(c)Â
Whenever practicable and when permitted by the
zoning provisions of this chapter, the construction should aim to
reduce the total area of impervious surface and not increase the runoff
flow rate.
(d)Â
Evaluation shall be made of the nature of the
subwatershed(s) of which the site is a part, the receiving stream
channel capacities and the points of concentration structure as shown
on a Borough map showing roads, streams, culverts, bridges, and the
existing drainage Master Plans.
(e)Â
To the greatest possible extent, the plan shall
avoid the concentration of flow and shall provide for dissipation
of velocities at all concentrated discharge points.
(f)Â
Reestablishing vegetation cover shall be in
accordance with Standards and Specifications for Soil Erosion and
Sediment Control in New Jersey, current edition.
(g)Â
The plan shall establish a time schedule for
temporary and permanent stormwater management measures during construction,
to include seeding and establishing sod in grass waterways.
(4)Â
Review of plan. The stormwater management plan shall
be submitted to the Borough Engineer for review and approval. If the
applicant is before the Planning Board or Board of Adjustment, the
Borough Engineer shall report to the appropriate agency whether he
approves or disapproves the stormwater management plan. The agency
may condition its approval of the applicant for site plan, subdivision
or variance upon approval by the Borough Engineer of the stormwater
management plan. In the event that the applicant disagrees with the
decision of the Borough Engineer regarding the stormwater management
plan, the applicant may take an appeal to the Board before which the
application is being considered.
(5)Â
Design standards. The Borough Engineer shall utilize
the following design standards in reviewing the stormwater management
plan:
(a)Â
The stormwater management design for all residential
and nonresidential development shall be in conformance with the Stormwater
Management Rules (N.J.A.C. 7:8) of the State of New Jersey and the
New Jersey Stormwater Best Management Practices Manual published by
the NJDEP dated April 2004 and amended thereafter. These rules set
forth the required components of regional and municipal stormwater
management plan and establish the stormwater management design and
performance standards for new (proposed) development. The design and
performance standards for new development include groundwater recharge,
runoff quantity controls, runoff quality controls and Category One
buffers. Details of the performance standards can be found in Subchapter
5 of the Stormwater Management Rules.
(b)Â
All facilities are to be designed in a manner
to retard velocities at the outfall and provide stream channel protection.
(c)Â
When a natural drainage pattern is necessarily
intercepted, as by a street, this shall be provided for by proper
engineering means.
(d)Â
All structures and land treatment practices
shall conform to Standards and Specifications for Soil Erosion and
Sediment Control in New Jersey, current edition.
(e)Â
All water-carrying structures and/or retention
areas shall be completed and stabilized prior to diversion of water
to them.
(f)Â
Prior to developing the stormwater management
plan, there shall be an inventory of the site showing all existing
natural and man-made drainage related features. These shall be incorporated
in the plan to the greatest possible extent in accordance with their
functional capability.
(g)Â
Drainageways and watercourses which normally
carry or receive stormwater runoff shall not be overloaded with increased
runoff, sediment or other pollution resulting from disturbance of
soil and vegetation incident to development, construction or other
activity.
(h)Â
Due consideration shall be given to the relationship
of the subject property to the natural or established drainage pattern
of the subwatershed(s) of which it is a part.
(6)Â
Factors to guide plan review. The Borough Engineer's
review of the stormwater management plan shall be guided by but not
be limited to the following factors:
(a)Â
The suitability of the applicant's proposed
stormwater management measures, devices and planning techniques, whether
involving on-site or off-site measures, or some combination thereof,
in respect to the total stormwater runoff, velocities and rates of
discharges which the applicant's proposed construction or land disturbance
may generate.
(b)Â
Existing topography, present vegetation and
soil factors, subject to field verification.
(c)Â
Groundwater recharge and discharge areas and
wet soils, as shown on the United States Department of Agriculture
Soil Conservation Service Map, "Alluvial, Poorly Drained and Somewhat
Poorly Drained Soils."
(d)Â
Groundwater quality, as determined by chemical
and biological analysis, as required by the Borough Engineer.
(e)Â
Soil characterization from the surface to the
groundwater level.
(f)Â
The quantity of available groundwater.
(g)Â
Wastewater disposal and its effect on groundwater
quality.
(h)Â
The seasonal high groundwater table.
(i)Â
The design storm.
(j)Â
The natural drainage flows and patterns in the
subwatersheds affected by the plan.
(k)Â
Any existing land uses in both the immediate
area and in the surrounding drainage region.
(l)Â
Any other applicable or relevant environmental
and resource protection ordinances in effect.
(7)Â
Implementation and enforcement.
(a)Â
Building permits. No building permit shall be
issued by the Building Inspector without an approval of the stormwater
management plan by the Borough Engineer.
(b)Â
Inspection.
[1]Â
The applicant shall bear full and final responsibility
for the installation and construction of all required stormwater runoff
control measures according to the provision of his approved plan and
this section. The Borough Engineer shall inspect the site during its
preparation and development to ensure that all stormwater management
measures have been constructed in accordance with the provisions of
the applicant's approved plan under this section.
[2]Â
The Borough Engineer shall make periodic site
visits after project completion to assure that all parts of the plan
have been complied with.
(c)Â
Certificate of occupancy. No certificate of
occupancy shall be issued by the Building Inspector unless and until
receipt of a certification by the Borough Engineer that the construction
complies with the approved stormwater management plan.
(8)Â
Special requirements for single-family dwellings.
All single-family residential dwellings are exempt from the requirement
in this section of submission of a stormwater management plan. However,
in all such dwellings, house leaders must be connected into a Borough
drainage facility or Borough drainage way if possible and approved
by the Borough Engineer. This section shall in no way be construed
as limiting the power of the Board of Adjustment or the Planning Board
to require submission of information and/or plans relating to stormwater
management.
(9)Â
Violations and penalties.
(a)Â
Any person violating the provisions of this
section shall, upon conviction thereof, be subject to a fine not exceeding
$500 or imprisonment in the county jail for a term not exceeding 90
days, or both.
(b)Â
Any person convicted of a violation of any provision
of this section shall be liable for the cost of correcting said violation.
D.Â
Design criteria not covered herein.
(1)Â
Criteria not incorporated herein necessary for design
shall be based on recommendations incorporated with Hydraulic Engineering
Series circulars published by the Federal Highway Administration and
ASCE Publication, Design and Construction of Sanitary and Storm Sewers,
current edition, and as approved by the Borough Engineer.
(2)Â
Design methods prepared by the Soil Conservation Service
may be used for drainage design with the approval of the Borough Engineer.
E.Â
Subsurface disposal. Due to the dolomitic limestone
geologic formation underlying the Borough of Alpha and the significantly
increased possibility for the occurrence of sinkholes when stormwater
is disposed of by subsurface means rather than to a surface watercourse,
and due to the potential for serious property damage and the endangerment
of the public health, safety and welfare associated with the occurrence
of sinkholes, the disposal of stormwater by subsurface means is hereby
prohibited.
A.Â
Sanitary sewage disposal.
(1)Â
Where a public sanitary sewer system is accessible,
each lot within a subdivision shall be provided with sewage disposal
facilities by the required extension of sewer mains and connections
thereto. All such installation of sewer mains and connections shall
be constructed in conjunction with the specifications and requirements
of the Borough of Alpha and shall be subject to the approval of the
Borough Engineer.
(2)Â
Where a public sanitary sewer system is not accessible
and where installation of sewer lines and a sanitary sewer disposal
plant is not required, the subdivider may be required by the Planning
Board to install within the subdivision a complete sewerage system,
including provision for connection thereto at each lot, provided that
there is reliable information to indicate that connection of the development
to a public sanitary sewerage system can be anticipated within a reasonable
period of time. Under such circumstances, the subdivider shall be
required to install individual sewage disposal systems for each lot
at the time improvements are erected thereon. All such individual
sewage disposal systems shall be constructed in accordance with the
requirements of the State Department of Environmental Protection and
the Board of Health of the Borough of Alpha, and all such sewerage
systems shall be constructed in accordance with the requirements of
the Borough of Alpha and shall be subject to the approval of the Borough
Engineer. The installation shall include house sewer service connections
to the curbline, at which point the same shall be capped.
(3)Â
Percolation tests. Where the provisions of Subsection A(2) above are implemented, the subdivider shall furnish to the Planning Board satisfactory proof by in the form of soil testing in accordance with the requirements of Chapter 140 that the substrata under each lot is sufficient to support a properly functioning individual sewage disposal system conforming to the requirements of Chapter 140.[1]
B.Â
Water mains.
(1)Â
When a public water supply system is accessible for
the subdivision, each lot within the subdivision shall be provided
with water supplied by said water supply system. All facilities for
said system shall be installed pursuant to and in accordance with
the provisions of the ordinance regulating the distribution and use
of water of the Borough of Alpha[2] and all ordinances pertaining thereto, under the supervision
of the Borough Engineer.
(2)Â
In the event that a public water supply system is
not available to supply the proposed subdivision, the subdivider shall
construct a private water supply system in such manner that an adequate
supply of potable water will be available to each lot within the subdivision
at the time improvements are erected thereon and so that such system
can be incorporated within the public supply system when and if it
shall become available. The water treatment and distribution system
shall be constructed and installed in conformity with the ordinance
regulating the distribution and use of water of the Borough of Alpha,[3] under the direct control and approval of the Borough Engineer.
The adequacy, healthfulness and potability of the private water supply
system shall be subject to the approval of the Alpha Board of Health
and the State Department of Environmental Protection, when such approval
is required.
(3)Â
Fire hydrants shall be installed in all subdivisions
when a central water supply exists. Fire hydrants shall be of the
type approved by the Borough of Alpha and shall be placed and installed
in accordance with the standards of the Borough of Alpha. Such installation
shall be subject to the inspection and approval of the Borough Engineer.
C.Â
Electric, telephone and cable television.
(1)Â
Except as otherwise provided in the regulations of
the Board of Public Utility Commissioners, in all major subdivisions,
electric, telephone and cable television facilities shall be installed
underground.
(2)Â
Streetlighting. The applicant shall arrange for the
installation of streetlighting facilities. Streetlighting shall be
guided by the following minimum requirements:
Street Class
|
Minimum Average Maintained Footcandles
|
Uniformity
(average to minimum)
| |
---|---|---|---|
Major collector
|
0.5
|
6:1
| |
Minor collector
|
0.3
|
 —Â
| |
Local
|
0.2
|
 —Â
|