1808 MERRILL CREEK PKY 2016-01-01 MF Import

As depicted in the preliminary site ptan, the proposed development consists of four large buildings, totaling 403,300 Sq. Ft. and the associated pazking facilities. Post-developed conditions are summarized as follows: Area: 9.26 Acres of Buildings @ CN=98 11.76 Acres of Parking�CN=98 �,.w-�,,. ;, :,. 0.25 Acres of Sidewalk and Other Impervious Surfaces @ CN=98 ' � ' 2.50 Acres of Landscaping @ CN=86 6.04 Acres of Undisturbed Steep Slopes @ CN= 81 Time of Concentration: 220' of 50.00% Sheet Flow through restored slope, n=0.40 and Tc= 16.26 Ivtin 2,000' of 1.00%Channel Flow through smooth pipe, Ke= 10.0 and Tc=7.94 Mu► Total Tc=24.20 Nfin Site#2-Hardeson Road � This site consists of one 21.84 acre parcel. The attached boundary & topographic survey � � indicates a noRh-south ridge near the easteily property line, dividing the site into two drainage i basins. The easterly basin drains to the north, in a broad, gentle draw. The westerly basin flows , � �-, rather uniformly to the west, to I3ardeson Road. The pre-developed conditions are summanz � � as follows: ,., Easterly Area: 5.68 Acres Ground Cover: Dense Trees&Underbrush, CN=76 (Tokul Gravelly Loa�n, Soils :iroup C) •x I � Time of Concentration: 300' of 2.40% Sheet Flow t}vough forested underbrush, n=0.60 and Tc= 97.13 Nfin - 810'of 2.40% Shallow Flow through forested ravine, Kc=4.0 and Te=Z 1.79 Min Total Tc= 118.92 Nfin Westerly Area: 16.16 Acres Ground Cover: Dense Trees&Underbrush, CN=76 (Tokul Gravelly Loam, Soils Group C) -� Time of Concentration: 270' of 5.60% Sheet rlow through forested underbrush, n=0.60 and Tc=63.61 Nfin 300' of 14.00% Shallow Flow through forested ravine, Kc=4.0 and Tc=3.34 Min — 130'of 16.90% Shallow Flow thcough forested ravine,Kc=4.0 and Tc= 1.32 Min Total Tc=68.271vfin As depicted in the preliminary site plan, the proposed development consists of seven larse buildings, totaling 249,000 Sq. Ft. and the associated pazking facilities. Based upon the conceptual site plan, I would assume all of the site's drainage would prefer to flow to the west, to Hardeson Road. If division inro two sub-basins is required, creative site grading must be planned. Post-developed conditions are summarized as follows: