Where a sketch plan is submitted in accordance with §
103-10, it is suggested that it contain the following data:
A. Tract boundaries, accurately labeled.
B. The name of the Township, county and state in which
the development is located.
D. Written and graphic scales.
E. Significant topographical and physical features.
F. Existing and proposed general street and lot layout.
G. The date and name of the developer and subdivision.
[Amended 9-16-1991 by Ord. No. 91-08]
A. Requirements. A conservation plan and supporting analysis
of potential adverse environmental impacts, alternatives to the subdivision
and land development as proposed, measures to minimize adverse environmental
impacts, and measures to mitigate such impacts shall accompany the
preliminary and final subdivision or land development plans.
B. Information. A conservation plan shall include the
following minimum information.
(1) Inventory.
(a)
Property base map. A base map of the applicant's
property shall meet the requirements for preliminary plan approval
with respect to sheet size, scale, property acreage calculations,
delineation of courses and distances of property boundaries, dedicated
street rights-of-way and easements with sheet size and scale conforming
to the requirements of the Chester County Recorder of Deeds.
(b)
Existing natural features. The following information
shall be shown on the property base map:
[1]
Geologic formations, based upon available published
information or more detailed data obtained by the applicant for the
applicant's property.
[2]
Topography or degree of slope, as measured at
two-foot contour intervals, in the following ranges: less than fifteen
to twenty percent (15% to 25%), and greater than 25% on the applicants
property and within 200 feet of such. Location and elevation to which
contour elevations refer shall be identified and shown with reference
to a known, established bench mark as approved by the Township Engineer.
[3]
The location of delineated or suspected wetland
areas, ponds, streams, springs and natural drainage swales, both perennial
and seasonal, on the applicant's property and within 200 feet of such.
[4]
Areas on the applicant's property and within
200 feet of such within the floodplain district, as delineated by
the Township Floodplain Maps.
[5]
Soil series, types and phases, as mapped by
the Soil Conservation Service for the Chester County Soil Survey,
and accompanying data tabulated for each soil, including its name,
depth to seasonal high water table, depth to bedrock, agricultural
capability class, erodibility (if data are available), limitations
of soil type (including load-bearing capacity, drainage and plant
growth) and hydrologic group.
[6]
Vegetative cover conditions on the property
according to general cover type, e.g., cultivated land, permanent
grassland, old field, hedgerow, woodland, tree clusters, individual
freestanding trees over six inches DBH, specimen trees over 20 inches
DBH, wetland vegetation, etc. For all woodlands, the applicant shall
indicate the principal species of dominant and codominant trees and
the shrub understory. Driplines for trees of at least six inches DBH
not within woodlands or tree clusters and for the edge of woodland
areas and tree clusters shall be shown on the plans.
[7]
Existing structures and other improvements.
[8]
Historic resources including structures, ruins,
sites, traces and the relationship to the bounds of any National Register
historic structure or district.
[9]
Scenic and/or conservation easements on the
applicant's property and within 200 feet of such.
[10]
Ridgelines and high points within each portion
of the tract in order to delineate (in addition to natural drainage
patterns) viewsheds from adjacent public roads and areas within the
tract having views of surrounding natural features.
[11]
Any areas having existing or potential toxic
substances, including any prior dumping areas, landfill areas and/or
underground tanks.
[12]
Riparian buffer areas, as defined in the Birmingham Township Zoning Ordinance, Chapter
122 of the Township Code.
[Added 12-21-1998 by Ord. No. 98-15]
(2) Land disturbance. The conservation plan shall delineate the areas of the tract to be graded, filled, cut, covered with impervious surface or otherwise disturbed and conversely shall delineate the areas of the tract proposed to remain undisturbed. Where a wooded lot as referenced in §
103-41C(1) hereof is proposed to be disturbed, the conservation plan shall also delineate all trees of six-inch DBH or larger proposed to be preserved or removed.
(3) Impact assessment. All applicants shall assess in
narrative form the on-site and off-site impacts of their proposed
activities and the scale and/or magnitude of such impacts on existing
natural features. The assessment shall, at minimum, include the following:
(a)
A description of the location and tabulation
of the types and acreages of the natural features which would be disturbed.
(b)
A description of the location and dimensions
of all improvements proposed by the applicant, including tabulations
of gross square foot coverage of all proposed impervious surfaces.
(c)
Consideration of all reasonable alternatives to minimize disturbances to natural features. The applicant shall furnish evidence that such alternatives were considered if, in the judgment of the Township, such information is required to determine if the applicant has complied with §
103-41 hereof.
(4) Mitigation. The conservation plan and impact assessment
shall include provisions for impact mitigation as follows:
(a)
Depiction on the conservation plan or a separate
plan of mitigation measures proposed by the applicant, including number
and placement of plantings and of other landscape or design improvements.
(b)
Description of views of the applicant's property
as it would be developed as seen from adjoining properties used or
zoned for residential or institutional purposes and from existing
adjoining public roads. Such views shall be classified according to
whether views of the applicant's proposed improvements would be hidden,
filtered or unobstructed.
(c)
A description of views of the applicant's property
as they would be seen at the time the applicant's mitigation improvements
are in place.