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18" <br />Q.G. <br />2" 1' <br />2 <br />NOTCHED GRADE <br />BOARD, 2'x2" <br />NOTCHES 18" O.C. <br />cc <br />0 T <br />ofLO <br />25' MIN <br />VEG. FLOW PATH <br />2'x12" PRESSURE <br />TREATED GRADE <br />BOARD <br />GALVANIZED BOL <br />4"x4" SUPPORT <br />POST <br />6" M <br />NE 114, NE 114, SEC.24, T.28N, R.04E, W.M. <br />SNOHOMISH COUNTY, WASHINGTON <br />1' <br />MIN <br />END CAP OR PLUG <br />CLEAN OUTWYE FROM PIPE <br />o L <br />o Lc) <br />4" OR 6" PERFORATED <br />N N <br />^ ^ <br />^ o <br />PIPE LAID FLAT/LEVEL <br />TYPE 1 CB WITH SOLID <br />A COVER (LOCKING) <br />Ll <br />LOCATE DRAIN 25' C� <br />4 INFLUENT PIPE (MAX DESIGN <br />IL <br />FROM R.O.W. IF :Z <br />FLOW < 0.5 CFS PER TRENCH) <br />700 SQ. FT MAX. <br />DRIVEWAY SLOPES <br />BETWEEN BERMS <br />TOWARD STREET <br />o CLEAN OUTWYE FROM PIPE <br />v <br />PLAN 2" To 4" <br />NTS <br />DIAGONAL BERM WITH <br />- <br />6" MIN <br />�( DISPERSION TRENCH. <br />PIPE 0. D. BERM DETAIL <br />0,° <br />9T5 �FjgT <br />s� r <br />NTS <br />1,F0 1 <br />SFc ��� <br />MPX <br />41N MIN .20% <br />���� <br />25' MIN <br />- <br />FLOWPAED <br />FILTER FABRIC u <br />III-1 I �- <br />4 — <br />Ii.. <br />O_ 4" OR 6" PERFORATED <br />III- PIPE LAID FLAT <br />CLEAN (s5% FINES) <br />SECTION A —A 1-1/2"-3/4" WASHED ROCK <br />NTS * 15 MAX FOR FLOW <br />CONTROL/WATER QUALITY <br />ROOF DRAIN TRENCH TREATMENT IN RURAL AREAS <br />PROPOSED ROOF AREA = 3,345 SF <br />10 LF OF TRENCH REQUIRED PER 700 SF ROOF AREA <br />REQUIRED TRENCH LENGTH= 3,474 SF x 10 LF / 700 SF = 47.8' <br />DESIGNED TRENCH LENGTH= 50' <br />NPGIS DISPERSION TRENCH DETAIL: <br />FIG 111-3.1.6 OF DOE SWMMWW <br />NOT TO SCALE <br />ROOF DRAIN <br />OUTFLO <br />SPLASH BLOCK <br />ENSURE THAT NO MORE THAN 700 SFF, OF IROOF AREA <br />FLOWS TO EACH SPLASH BLOCK. SPLASH BLOCK OUTLET <br />TO CONTAIN A MIN. 50' VEG. FLOW PATH. <br />ROOF DOWNSPOUT <br />NOT TO SCALE <br />Western <br />Engineers & <br />Surveyors <br />SURVEYORS o PLANNERS o ENGINEERS <br />(6f3D>(' <br />COPYRIGHT © 2019 <br />TAX ACCOUNT NO. (S): <br />00396900000600 <br />PLAN- STEEP DRIVEWAY WITH DIAGONAL BERMS <br />NTS <br />Co CD <br />Ncr <br />F- <br />w <br />LOCATE DRAIN 25' o cn <br />FROM R.O.W. IF <br />DRIVEWAY SLOPES = <br />700 SQ. FT. MAX. TOWARD STREET <br />BETWEEN DRAINS <br />>c DIAGONAL BERM WITH <br />h. r�rr <br />DISPERSION TRENCH. > o c r r <br />o <br />9Ty s�q�Fo >)As <br />\ 25' MIN <br />VEGETATED <br />FLOWPATH <br />PLAN- STEEP DRIVEWAY WITH SLOTTED DRAINS <br />NTS <br />CONCENTRATED FLOW DISPERSION <br />FOR STEEP DRIVEWAYS <br />FIG V-5.3.1 OF DOE SWMMWW <br />NOT TO SCALE <br />CALL 811 TWO (2) <br />BUSINESS DAYS <br />BEFORE YOU DIG <br />PEN 19- <br />SITE ADDRESS. <br />10103 1ST DRIVE SE <br />EVERETT, WA 98204 <br />DETAILS FOR: <br />(425) AE CONSTR UCTION <br />356-2700 NE 114, NE 114, SEC.24, T.28N, R.04E, W.M. <br />SNOHOMISH COUNTY, WASIMVGTON <br />LAND USE CONSULTANTS <br />CIVIL ENGINEERS o LAND SURVEYORS <br />*** 9740 EVERGREEN WAY * EVERETT * WA * 98204 *** <br />DRAWN BY DATE REV. BY DATE PROJECT MANAGER SCALE <br />NAT 08101119 T. SARKELA AS SHOW.) <br />DRAWING FILE NAME CHECKED BY F.B. NO. JOB NUMBER SHEET NO. <br />191821ABASE.DWG TAS — 19-1821 A 4 OF4 <br />