1808 MERRILL CREEK PKY 2016-01-01 MF Import

�+�e.�eai'�� As depicted in the preliminary site plan, 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(u;CN=98 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 Min 2,000' of 1.00%Channel Flow through smooth pipe,Kc= 10.0 and Tc=7.94 Min Total Tc=24.20 Min Site#2-Iiardeson Road This site consists of one 21.84 acre parcel. The attached boundary & topographic survey indicates a north-south ridge near the easterly property line, dividing the site into two drainage basins. The easterly basin drains to the north, in a broad, gentle draw. The westerly basin flows rather uniformly to the west, to Hardeson Road. The pre-developed conditions are summarized as follows: Easterly Area: 5.68 Acres Ground Cover: Dense Trees&Underbrush, CN= 76 (Tokul Gravelly Loam, Soils Group C) Time of Concentration: 300'of 2.40% Sheet Flow through forested underbrust., n=0.60 and Tc=97.13 Min 810' of 2.40% Shallow Flow through forested ravine, I:�=4.0 and Tc=21.79 Min Total Tc= 118.92 Min 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 Flow through forested underbrush, n=0.60 and Tc=63.61 Min 300' of 14.00% Shallow Flow through forested ravine,Kc=4.0 and Tc= 334 Min 130'of 16.90% Shallow Flow through forested ravine,Kc=4.0 and Tc= 132 Ivfin Total Tc=68.27 Min As depicted in the preliminary site plan, the proposed development consists of seven large buildings, totaling 249,000 Sq. Ft. and the associated parking 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 into two sub-basins is required, creative site grading must be planned. Post-developed conditions are summarized as follows: