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planning documents. The next task is
<br /> to identify two kinds of resource areas. R.4„i, "', -....„ 1-1,4.0',.-14-. -, f 's
<br /> •Primary Conservation Areas comprise - ,,..'.-L ---..`',.s , t X.
<br /> ,.
<br /> r.,,.. 7 . only the most severely constrained , � is• tt��*4 'at „ rt,.>p
<br /> t t lands,where development is typically k ak , >144' , ”
<br /> i , ,, �., restricted under current codes and laws ti & 1 A 3 Al .,44..„,�� 4._� , , i
<br /> dr �� n�, ,..o•vo,,!.�•!•1. �V f- (such as wetlands, floodplains,and �t � �` � 3
<br /> ��`''Z7 /:d L'��- � '}, Y j74". Yea _-.•,•11.16,,,,g6„,.:i i4
<br /> /., ����/� slopes exceeding 25%). Secondary �' �: �� " ;��
<br /> Conservation Areas include all other ` � ' ,b La_° .,.
<br /> e,4 �'� %� � locally noteworthy or significant dont
<br /> o C� y y g scan[fea es backing onto open space.Prairie Crossing
<br /> development.Grayslake,Lake Count Illinois.
<br /> os,Q a` % are/ tures of the natural or cultural land P y y
<br /> scape—such as mature woodlands,
<br /> wildlife habitats and travel corridors, sheds). It will also reveal gaps where
<br /> prime farmland,groundwater recharge no features appear.
<br /> areas,greenways and trails,river and Although this exercise is not an
<br /> stream corridors,historic sites and exact science,it frequently helps local
<br /> k, buildings,and scenic viewsheds. These officials and residents visualize how
<br /> Secondary Conservation Areas are various kinds of resource areas are con-
<br /> together all that information and creat- often best understood by the local resi nected to one another,and enables
<br /> ing a Map of Potential Conservation them to tentatively identify both broad
<br /> dents who may be directly involved in
<br /> Lands. their identification. Usually these swaths and narrow corridors of
<br /> Such a map is vitally important to resource land that could be protected
<br /> any community interested in consery in a variety of ways.
<br /> ing an interconnected network of open - Not surprisingly, the most im or-
<br /> x_ cam . P
<br /> space. The map serves as the tool a _ tant step in designing a conservation
<br /> which guides decisions regarding � subdivision is to identify the land that
<br /> which land to protect in order for the v is to be preserved. By using the corn-
<br /> which
<br /> to eventually take form and � '
<br /> ` �; 4: munity-wide Map of Potential Conser-
<br /> e substance. d
<br /> ' -t ,, --. �, vation Lands as a template for the
<br /> A Map of Potential Conservation irk ` rat's,
<br /> Lands starts with information con- '4.>z°�.�r- )"_" . , e;: . . layout thin newsubdivisions, theseldevel areas
<br /> tamed in the community's existing View from hill.Ponds at Woodward development. opments help to create an intercon-
<br /> Kennett Township,Chester County,Pennsylvania. nected network of open space
<br /> spanning the entire municipality.
<br /> resource areas are totally unprotected
<br /> � , � � Figure 1 shows how the open space
<br /> , and are simply zoned for one kind of
<br /> in three adjoining subdivisions has
<br /> �. 4 in
<br /> or another.
<br /> . � �_ been designed to connect,and illus-
<br /> � �� s . Abase map is then prepared on trates the way in which the Map of
<br /> t,_•,46;-••,L=1.‘�'I 6 • ..i which the Primary Conservation Areas
<br /> v _ t o ' - x r Potential Conservation Lands can
<br /> r have been added to an inventory ofy .--:1.---":, -1,, become a reality.
<br /> ' ' ' i _, lands which are already protected
<br /> A .,, (such as parks,land trust preserves, Stormwater management
<br /> - x ) tr i and properties under conservation & Water unlit
<br />• ' _ ' -. , easement). Clear acetate sheets show Conservation subdivision design
<br /> g
<br /> ° -, ', ` i. -, ; . ._- ing each kind of Secondary Conserva- offers a more effective and less costly
<br /> {rtiv",- �,,�:'�`''`"• ,� tion Area are then laid on top of the approach to stonnwater management
<br />..� , r :' ',,: base map in an order reflecting the than conventional subdivision layout.
<br /> �, ' - �'` community's preservation priorities This is because conservation design
<br /> (as determined through public causes less disturbance to the subdivi-
<br /> ' discussion). sion parcel as a whole (leaving a
<br /> i, r ,� This overlay process will reveal cer greater percentage of woodlands and
<br /> t - - fain situations where two or more con meadows in their natural state),pro-
<br /> "" servation features appear together viding larger areas of natural vegetation
<br /> (such as woodlands and wildlife habi- that act as buffers to help filter
<br /> tats,or farmland and scenic view- stormwater.
<br /> PLANNING COMMISSIONERS JOURNAL / NUMBER 33 / WINTER 1999
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