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� <br /> J . B. FRIEL Y� �0. <br /> Civil Engineer: <br /> 9502 19th Avenue SE, 3uit.e ll <br /> Everett, Washington 9820'+ <br /> 337-3400 D �j�� <br /> ,� � L �D <br /> Jt�ly 1� , 197s UL 141919 <br /> .......................... ........................_ <br /> City of Everett �� � � <br /> Engineering and Building Dep-�rtn�nt� �'n�rimnr�i�;, �;,�. <br /> City Hall <br /> Everet;t , Idashington 9�'����1 <br /> RE: ro]Uy rent,er <br /> Gentlemen: <br /> In acr_or•dance witih the revi-ew �omnients nrovi�7ed by yoiar <br /> office, enclosed herewith is the amended d;��ain��e rlan and ;;;:udv <br /> to reflect your newly adopted requirement:s : <br /> 1. Manhole N1 has been redesignated f F3t" an�7 no lonr���r <br /> ra�tains a flow regulating device. Please note that it� Lon <br /> elevation is 278, well above the CB�/1 invert of 266 . <br /> 2. Subsequent to the preparation of the original drainare <br /> plan and prior to its approval by the City, the City adopted a <br /> standard metnod of calculating detention volumes for areas of <br /> less than 5 acres designated the "Simplified Rational Method <br /> Technique" . This 1:�ethod has been used to recalculate all the <br /> detention volumes in the Colby Center proposal. <br /> 3. Indication has been included on the plans that parkinrc <br /> areas drain toward the inte^nal catch basins. <br /> Should you h�ve any que;tions , please contact our office , <br /> Very truly ,yours, <br /> . � <br /> � � �- , ,��� <br /> � P,ObERT i', . CULP , Desi�n En�-,inee�^ <br /> �� <br /> :�HC: slz, <br /> Enclosure� <br /> cc : 6�r . �:ob �'];s:mp-i�-n <br />