[Ord. 2004-2, 4/5/2004]
1.
General Requirements. From and after the date of enactment of this
chapter, a stormwater management plan, and other information specified
herein, shall be submitted to the municipality for all regulated activities.
A stormwater management plan, and other information specified herein,
shall be submitted at the same time, and together with submission
of a preliminary and/or final subdivision or land development plan,
along with a completed checklist supplied by the municipality indicating
the items contained within the submission.
2.
Concurrent Reviews. Such plans and information shall be considered
part of said zoning and subdivision documents, and shall be reviewed
in accordance with procedures established thereunder. Preliminary
approval and/or final approval of a subdivision or land development
plan, and/or the issuance of a zoning permit shall be contingent upon
the submission of a stormwater management plan and other materials
specified herein, and approval of the stormwater management plan in
accordance with provisions of this chapter.
3.
Review by Municipal Engineer. All stormwater management plans shall
be submitted to the Municipal Engineer for review and comment. Such
review shall include a statement by the Municipal Engineer specifying
the provisions of this chapter which have not been met by the plan
as submitted.
4.
Validity of Approved Plan. Once a stormwater management plan has
been approved, together with a subdivision or land development plan
approval, or together with the issuance of a zoning permit, said stormwater
management plan shall be valid only for the subdivision, land development,
or zoning permit approved. Any further development on the lot or lots
requiring a revision of the approved plan, or other construction or
activities, as defined by municipal zoning regulations, shall require
the submission of a new, amended, or revised stormwater management
plan, and other information specified herein.
A.
Exemptions From Plan Preparation. The following activities are specifically exempt from the plan preparation and submission provisions of this chapter, but remain subject to the design standards and criteria specified in Part 3 of this chapter (and erosion and sediment pollution control requirements).
(1)
Noncommercial home gardening;
(2)
Agriculture, when operated in accordance with an approved conservation
plan, or erosion and sedimentation control plan;
(3)
Forest management operations, conducted in accordance with the
PA DEP's "Soil Erosion and Sedimentation Control Guidelines for
Forestry," and an approved erosion and sediment pollution control
plan;
(4)
Regulated activities may be exempt from the plan preparation
and submission provisions of this chapter if the total impervious
area associated with such activities will be less than 2,500 square
feet. The municipality and its Engineer shall review all regulated
activities to determine if the activity or activities may be exempt
from the plan preparation and submission provisions of this chapter.
In addition to the criteria in this chapter subsection, the municipality
and its Engineer may require that regulated activities maintain a
minimum distance between proposed impervious areas/stormwater management
facility outlets and downslope property line(s).
B.
All regulated activities that do not fall under the exemption criteria
referenced herein shall submit a drainage plan to the municipality
for review. These criteria shall apply to the total proposed development,
even if development is to take place in stages. Impervious cover shall
include, but not be limited to, any roof, parking, or driveway areas;
and any new streets and sidewalks. Any areas designed to initially
be gravel or crushed stone shall be assumed to be impervious.
(1)
Stormwater drainage systems shall be provided in order to permit
unimpeded flow along natural watercourses, except as modified by stormwater
management facilities or open channels consistent with this chapter.
(2)
The existing points of concentrated drainage that discharge
onto adjacent property shall not be altered without permission of
the affected property owner(s), and shall be subject to any applicable
discharge criteria specified in this chapter.
(3)
Areas of existing diffused drainage discharge shall be subject
to any applicable discharge criteria in the general direction of the
existing discharge, whether proposed to be concentrated or maintained
as diffused drainage areas, except as otherwise provided by this chapter.
If diffused flow is proposed to be concentrated and discharged onto
adjacent property, the applicant/developer must document that adequate
downstream conveyance facilities exist to safely convey the concentrated
discharge, or otherwise prove that no erosion, sedimentation, flooding,
or other harm will result from the concentrated discharge.
(4)
Where a site is traversed by watercourses, drainage easements
shall be provided conforming to the line of such watercourses. The
terms of the easement shall prohibit excavation, the placing of fill
or structures, and any alterations that may adversely affect the flow
of stormwater within any portion of the easement. Maintenance, including
mowing of vegetation within the easement, shall be required, except
as approved by the appropriate governing authority.
(5)
When it can be shown that, due to topographic conditions, natural
drainageways on the site cannot adequately provide for drainage, open
channels may be constructed conforming substantially to the line and
grade of such natural drainageways. Work within natural drainageways
shall be subject to approval by PA DEP through the joint permit application
process, or, where deemed appropriate by PA DEP, through a general
permit or small projects permit.
(6)
Any stormwater management facilities regulated by this chapter
that would be located within or adjacent to wetlands or other waters
of the commonwealth shall be subject to approval by PA DEP through
the joint permit application process, or, where deemed appropriate
by PA DEP, the general permit process. When there is a question whether
wetlands may be involved, it is the responsibility of the applicant/developer,
or his agent, to show that the land in question cannot be classified
as wetlands, otherwise approval to work in the area must be obtained
from PA DEP.
(7)
Any stormwater management facilities regulated by this chapter
that would be located on state highway rights-of-way shall be subject
to approval by PA DOT.
(8)
Minimization of impervious surfaces, and infiltration of stormwater
runoff through stormwater infiltration facilities are encouraged where
soil conditions permit in order to reduce the size, or eliminate the
need for detention facilities.
(9)
In order to promote overland flow and infiltration, roof drains
should not discharge directly to streets or storm sewers. Roof drains
may discharge directly to streets or storm sewers when deemed necessary
by the municipality and its Engineer. Under no circumstances shall
roof drains discharge directly to sanitary sewer systems.
[Ord. 2004-2, 4/5/2004]
1.
The content of the plans shall consist of annotated maps, drawings,
engineering plans, and construction details. Said plan shall be prepared
by a registered landscape architect, professional engineer, or professional
land surveyor, with said preparer's seal and registration number
affixed to the plan. Plans for tracts of less than 20 acres shall
be drawn at a scale of one inch equals no more than 50 feet; for tracts
of 20 acres or more, plans shall be drawn at a scale of one inch equals
no more than 100 feet. Plans shall be submitted on twenty-four-inch-by-thirty-six-inch
sheets. All lettering shall be legible if the plans are reduced to
half size. All sheets comprising a submission shall be on one size.
2.
The following information, unless specifically exempted in writing,
must be shown on the plans, and prepared in a form that meets the
requirements for recording in the office of the Register and Recorder
of Northumberland County, Pennsylvania:
A.
The name of the proposed development and the name and address of
the owner of the property and the individual or firm preparing the
plan.
B.
Date of submission and revision.
C.
Graphic scale.
D.
North point.
E.
Total tract boundary with distances marked to the nearest foot, bearings
to the nearest degree, and total acreage of the tract.
F.
Key map showing all existing natural and man-made features beyond
the property boundary affected by the project, and the extent of the
watershed that drains through the project site.
G.
Topographic contours at intervals not greater than five feet for
existing and proposed conditions. Topographic contours at intervals
less than five feet may be required for flat sites, and to depict
certain existing and future stormwater management features. The reference
datum used to develop topographic contours shall be either NGVD 1929
or NGVD 1988;
H.
Drainage areas and subareas affecting the site, including areas necessary
to determine downstream impacts analysis, where required, for proposed
stormwater management facilities.
I.
Existing and proposed use, including the total area of impervious
surfaces after construction.
J.
Existing soil types, karst formations, floodplain boundaries, sinkholes,
undrained depressions, rock outcrops, streams, drainagecourses, wetlands
based on existing sources and references, and vegetation.
K.
Complete drainage systems for the site, including details for construction.
All existing drainage features which are to be incorporated in the
design shall be so identified. If the site is to be developed in stages,
a general drainage plan for the entire site shall be presented with
the first stage, and appropriate development stages for the drainage
system shall be indicated.
L.
Location and selected plant material used for vegetative filter paths
to sinkholes, and the location of all notices to be posted.
M.
If stormwater management facilities are off site, a note must be placed on the plan(s) referring to the location of the off-site facility or facilities. Said note must identify the entity or entities that will be responsible for the conveyance to, and maintenance of, the off-site facility or facilities. All such off-site facilities shall meet the design standards and criteria specified in Part 3 of this chapter, and details of the facilities shall be included with the plan.
O.
The following statement by the landowner: "I/we hereby acknowledge
that I/we and/or my/our assignees/grantees shall be responsible for
maintenance of the stormwater management system shown hereon, in accordance
with the approved stormwater management ownership and maintenance
plan for this project, and that such stormwater system shall remain
as a permanent fixture that cannot be altered, replaced, or removed
without prior written approval from Watsontown Borough."
P.
The location of the permanent watercourse that will receive stormwater
runoff from the project site.
R.
Horizontal location, and vertical profiles of all open channels including
hydraulic capacity.
S.
A note indicating that record (as-built) drawings will be submitted
by the applicant's/developer's professional engineer or
professional land surveyor for all stormwater facilities prior to
occupancy, or the release of the surety bond. Watsontown Borough reserves
the right to authorize the Municipal Engineer to review said record
drawing.
T.
The following stormwater management design certification signature
block for the registered professional preparing the stormwater management
plan:
"I,_________________________, hereby certify that the Stormwater
Management Plan meets all design standards and criteria of the Watsontown
Borough Stormwater Management Ordinance."
U.
The following municipal stormwater management review signature block
for the Municipal Engineer reviewing the stormwater management plan:
"I, _________________________, have reviewed this Stormwater
Management Plan in accordance with the Design Standards and Criteria
of the Watsontown Borough Stormwater Management Ordinance."
[Ord. 2004-2, 4/5/2004]
1.
In addition to the plan information enumerated in § 23-202 of this Part, the following information shall be submitted:
A.
A written description of:
(1)
The overall project concept.
(3)
Horizontal and vertical profiles of any existing and proposed
channels, culverts, drainageways, storm sewers, streams, or watercourses.
(4)
Hydrologic and hydraulic computations for all existing and proposed
stormwater management and conveyance facilities.
(5)
Stormwater management both during and after development.
(6)
Expected project time schedule.
B.
The effect of the project on stormwater runoff volume, time to peak
flow, and rate of flow on adjacent property, and upon an existing
municipal stormwater drainage system when such will be utilized.
C.
Description of all watercourses, impoundments, and wetlands on or
adjacent to the site, or into which stormwater flows.
D.
Soils investigation report, including boring logs, compaction requirements,
and recommendations for construction of detention basins, when requested
by the municipality or its Engineer.
F.
A soil erosion and sediment pollution control plan, including all
reviews and approvals, as required, by PA DEP and/or Northumberland
County Conservation District.
G.
All easements, deed restrictions, covenants, and maintenance measures of the system shall be outlined in an Ownership and Maintenance Program in accordance with Part 3, § 23-304, of this chapter. For stormwater management systems to be dedicated to the municipality, a maintenance guarantee, as specified by the Pennsylvania Municipalities Planning Code,[2] may be required by Watsontown Borough. The municipality
has the explicit right to reject any offer of dedication.
[2]
Editor's Note: See 53 P.S. § 10101 et seq.
