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1 <br /> Preliminary Stormwater Site Plan Everett,WA <br /> I <br /> M,S Open Trash&debris Dumping of yard wastes such as grass ' Remove trash and debris and <br /> I Ditches clippings and branches into basin. dispose as prescribed by the <br /> Unsightly accumulation of County. <br /> nondegradable materials such as glass, <br /> plastic,metal,foam,and coated paper. _ <br /> M Sediment Accumulated sediment that exceeds Ditch cleaned of all sediment and <br /> I buildup 20%of the design depth. debris so that it matches design. <br /> A Vegetation Vegetation(e.g.,weedy shrubs or Water flows freely through <br /> saplings)that reduces free movements ditches. Grassy vegetation should <br /> of water through ditches. be left alone. <br /> I <br /> M Erosion damage to Check around inlets and outlets for Find caused of erosion and <br /> signs of erosion. Check berms for signs eliminated them. Then slopes <br /> slopes of sliding or settling. Action is needed should be stabilized by using <br /> where eroded damage over 2 inches appropriate erosion control <br /> I deep and where there is potential for continues erosion. measure(s);e.g.,rock <br /> reinforcement,planting grass, <br /> compaction. <br /> A Rock lining Maintenance person can see native soil Replace rocks to design standard. <br /> I out of place or beneath the rock lining. <br /> missing(if <br /> applicable) <br /> Varies Catch See Catch Basins Checklist. See Catch Basins Checklist. <br /> I <br /> basins <br /> M,S Swales Trash&debris See above for Ditches. See above for Ditches. <br /> M Sediment See above for Ditches. Vegetation may need to be <br /> buildup replanted after cleaning. <br /> M Vegetation not Grass cover is sparse and seedy or areas Aerate soils and reseed and mulch <br /> I growing or are overgrown with woody vegetation. bare areas. Maintain grass height <br /> overgrown at a minimum of 6 inches for best <br /> stormwater treatment. Remove <br /> woody growth,recontour,and <br /> I reseed as necessary. <br /> M,S Erosion See above for Ditches. See above for Ditches. <br /> damage to <br /> slopes <br /> I M Conversion by Swale has been filled in or blocked by If possible,speak with homeowner <br /> homeowner to shed,woodpile,shrubbery,etc. and request that swale area be <br /> incompatible restored. Contact the County to <br /> use report problem if not rectified <br /> I _ voluntarily. <br /> A Swale does not Water stands in swale or flow velocity A survey may be needed to check <br /> drain is very slow. Stagnation occurs. grades. Grades need to be in 1- <br /> 5%range if possible. If grade is <br /> less than 1%underdrains may <br /> Ineed to be installed. <br /> Maintenance Checklist for Grounds (Landscaping) <br /> l <br /> Frequency Drainage 4Problem Conditions To Check For Conditions That Should Exist <br /> System <br /> Feature <br /> M General Weeds Weeds growing in more than 20%of Remove trash and debris and <br /> I (nonpoisonous) the landscaped area(trees and shrubs dispose as prescribed by the <br /> only). County. <br /> M Insect hazard Any presence of poison ivy or other Ditch cleaned of all sediment <br /> poisonous vegetation or insect nests. and debris so that it matches <br /> design. <br /> IIf you are unsure whether a problem exists, please contact a Professional Engineer. <br /> Comments: <br /> I A = Annual (March or April, preferred) <br /> M = Monthly (see schedule) <br /> S = After major storms (use 1-inch in 24 hours as a guideline) <br /> I <br /> I <br /> PACLAND Job# 50175001 Page 20 <br />