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the digging of basements and grading during open winters. Equipmen.t rental in the off season reduces earth rrloV le a est r•eferable ehovv ver, reasons, soils on the san aydisadva t ge of not providing enough traction extremely sandy soil has for heavy equipment so a little clay as a binder is optimum. etro olitan Area where on-site sewage d ia °reventsor at least In thls M p resence of heavy soils cou p been widely used, the p . raise t he cost of development because more effeets�stemssewouldlnot larger drain field6 would be enqWou d have to6wait he arrival of a function properly, developm wa e s stem• Sewage disposal problems hof Hi hway 12d to centi�al se g Y the slow growth on the east side of Saint Paul, sout g o ra h of a parcel of land determines th� i de subdi vis on de- The top g p Y expenses . Some areas °le f tr noemor e thansisolated home sites. As velopment and are suitab rou hness of the land decreases, the numbue �o �`Otadingtrequlre e the g subdivided in'� witli ease inc i�es an�d streets. Mostg ommunities have ments established for homes establishe d maximum street grades that are accepta�blslo� es� streeteets. Because of its physical characteristic� of short ste p grades and s torm water drainage problems, areas of The en�lineer for impose constraints for high d�nslty ]ot development. er lot in some one builder stated that grading costs ran a�o ��OO��r 8otPn a develop of th�ir gently rolling additions in contras on flat land. Sewer costs could increase s � P�e� en A�Pendix A); ment 120 er lot in tk�e ca average in rolling areas �$ P surveying costs and the other incidentals also woul orment Eosts ouYd areas of moderate roughness, the increase �n eve p exceed $500 per lot. The add�d costs of devcl�ping rolling land would mahesihomels unless he �uilder of competitive tract homes to build and sell was able to g et the land at a much lovver cast. Observstia° �ear heslrehe lowest riced homes were 3evelent dus}ne � south� rom inneapolis i.nto to build on lat land. eve opm p the at areas o Richfield and on into Blooming��a� of oll� gllgn� Which development followed a curving thrus� aroun lle clos er to Minn�apolis. Other major thrustis oundsvi wthand Goon Broolclyn Genter and Firookl�n� al n' Highway�61 in Cottage Grove �nd Rapids , and to a les s e r ext g Saint Paul F'ark. Wh ile rolling land is a deterrent of tract h olling�areasawthCp oPe nsub- asset for the sale of hlgher cost homes. � desi n off�r lots with vistas and an enviro�ks both ways �n that S division g variety among housing styles. This la�ter idea w this variet of housing designs must be used ta fiToached from the a greatcr Y g, Or, pp in turn suggests higher cost�c��s tO olbinga errain forces a more standpoint of c��velopn�ent :