This article shall be deemed essential and necessary
to protect the public health, safety and welfare of the citizens of
the Borough and the surrounding communities by accomplishing the following
purposes:
A.
Water management.
(1)
Maintain infiltration of surface water for groundwater
recharge.
(2)
Improve quality of nonpoint runoff by water retention
measures.
(3)
Maintain the adequacy of natural stream channels and
prevent accelerated bank erosion by controlling the rate, velocity,
volume and location of runoff discharge.
B.
Flood control.
(1)
Preserve the adequacy of culverts and bridges by suppressing
artificially induced flood peaks.
(2)
Reduce public expenditures for replacement or repair
of public facilities that would be made necessary by artificially
induced flood peaks.
(3)
Prevent damage to life and property from flooding
resulting from excessive rates and velocities of runoff.
D.
Environmental protection. Enhance and protect the
character of the lakes and streams of the Borough, and control discharges
to downstream communities.
[Amended by Ord. No. 3-90]
A.
Regulation. There shall be no land area developed
or altered which shall increase the quantity or velocity of stormwater
emanating from the land area, except in accordance with an approved
surface water management plan as provided by this article.
B.
Applicability. This article and the requirements stated
herein shall apply to any application which shall by any means increase
the quantity of surface water runoff emanating from the land area
except the development or alteration of any area by construction resulting
in aggregate improved lot coverage of less than 5% of the area or
2,000 square feet, whichever is more restrictive.
C.
Application for approval.
(1)
In cases where the development or alteration of land
involves the construction of a building or other facility requiring
site plan approval or a construction permit, the construction official
shall determine whether the development involves construction resulting
in aggregate improved lot coverage equal to 5% or more of the area
or 2,000 square feet, as aforesaid.
(a)
If the extent of the development or alteration
to be undertaken by the applicant is found to be exempt, the construction
official may proceed with the next step toward the issuance of a construction
permit.
(b)
The construction official may waive the surface
water management plan requirement if, after reviewing the application
for any single-family house, he determines that surface water runoff
hazards are not significant. If he has any doubt about this waiver,
he shall refer the question to the Planning Board.
(c)
If the extent of the development or alteration
to be undertaken requires approval with regard to the provisions of
this article, or if the application would otherwise require approval
by the Planning Board, the applicant shall proceed to submit a surface
water management plan and other data as outlined herein to the Planning
Board at the same time the plans for development or alteration are
submitted.
D.
Data required. For engineering review by the Borough
Engineer and submission to the Planning Board, the surface water management
plan shall contain:
(1)
The inventory of the site showing all natural and
man-made drainage features such as berms, culverts, terraces, grass
waterways, favorable hydrologic soils, poorly drained soils, swamps,
swales, watercourses, woodlands, stream encroachment lines, floodplains.
(2)
The size of the watershed and location of the site
within the watershed.
(3)
Computations of the total surface water runoff before,
during and after the disturbance of land and/or construction of impervious
surfaces.
(4)
A schedule of the sequence of installation of the
surface water management plan, relating to the starting and completion
dates of the project.
E.
General standards. In the preparation of a surface
water management plan, the following general standards shall be adhered
to:
(1)
All facilities shall be designed in accordance with
acceptable engineering practice and standards and are subject to the
approval of the Borough Engineer.
(2)
The peak rate and velocity of runoff from the site
following completion of the planned development shall not exceed that
which:
(3)
All facilities shall be designed to accommodate a
volume of runoff produced by 7 1/2 inches of rainfall over
a twenty-four-hour period or three inches of rainfall over a one-hour
period, whichever results in a greater storage requirement.
(4)
Volume of runoff from the site shall be controlled
through on-site stormwater detention and/or ground absorption systems.
(5)
Appropriate use shall be made of presently existing
surface water runoff control devices, mechanisms or areas such as
existing berms, terraces, grass waterways, favorable hydrologic soils,
swamps, swales, watercourses, woodlands, floodplains, in accordance
with their functional capability.
(6)
Evaluation shall be made of the nature of the watershed
of which the site is a part.
(7)
The plan shall coordinate with the soil erosion and
sedimentation control plan and with the environmental impact statement
plans for the site in question.
(8)
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.
(9)
All structures and land treatment practices shall
conform to the latest edition of Standards and Specifications for
Soil Erosion and Sediment Control in New Jersey, adopted by the Morris
County Soil Conservation District. All outfalls shall be designed
in a manner to retard velocities at the outfall and provide stream
channel protection. Drainageways and watercourses which normally carry
or receive surface water runoff shall not be overloaded with increased
runoff, sediment or other pollution resulting from disturbance of
soil and vegetation or incident to development, construction or other
activity.
(10)
The plan shall identify, and include a schedule
for the establishment of, temporary and permanent stormwater management
measures to include seeding and established vegetative cover. All
water-carrying structures and/or retention areas shall be completed
and stabilized prior to diversions of water to them.
(11)
Due consideration shall be given to the relationship
of the subject property to the natural or established drainage pattern
of the watershed of which it is a part. Surface water runoff controls
shall be designed to assure that the land in question uses no more
than its proportionate watershed share of the natural stream and culvert
capacity.
(12)
Innovative surface water runoff control and
recharge devices may be proposed, such as rooftop storage, drywells,
cisterns, roof drain infiltration trenches, provided they are accompanied
by detailed engineering plans and performance capabilities.
(13)
The curbing requirement may be relaxed by the
Borough Engineer in the interest of acceptable drainage accommodation
that will relieve concentration of flow or discharge to a stormwater
drain system.
(14)
Areas to be left undisturbed shall be physically
marked with survey stakes or protected with temporary snow fence prior
to any land disturbance.
A.
Surface water management plans shall be reviewed by
the Planning Board with the advice and assistance of the Borough Engineer,
Environmental Commission, Health Commission and any other agencies
as may be appropriate.
B.
The Planning Board shall make a determination on such
plans within 45 days of receipt of a complete application unless the
Planning Board and the developer mutually agree upon an extension
of the review time.
C.
The Planning Board, upon completing its review of
the application and data, shall either approve, tentatively disapprove
or disapprove the application. Upon approval, the construction official
may proceed with the next step toward the issuance of a construction
permit. If tentatively disapproved, the application and data shall
be returned to the applicant for resubmittal.
D.
If the Planning Board determines that the proposed
land disturbance or construction will generate no surface water runoff
that will not be managed in accordance with the provisions of this
article, and will not be detrimental to the public health, safety
and general welfare in light of the paramount interest in the prevention
of conditions which may result in surface water runoff damage, the
Board shall approve the plan.
E.
If the Planning Board determines that the proposed
land disturbance or construction will generate surface water runoff
which will not be managed in accordance with the standards of this
article or which will be detrimental to the health, safety and general
welfare in light of the paramount public interest in the prevention
of the conditions which may result in surface water runoff damage
and environmental degradation, the Board shall tentatively disapprove
the application. The Planning Board may also, at its sole discretion,
disapprove the application.
Any person carrying out surface water management measures under this article, and all subsequent owners of the property upon which such measures have been carried out, shall ensure the correct functioning of such measures. The Planning Board may require that maintenance bonds be posted as set forth in § 208-9B.
