4730 COLBY AVE YMCA 2021-03-31 - Laserfiche WebLink

I rCatch Table V-4.5.2(5) Maintenance Standards - Basins (continued) I Results Maintenance Conditions When Maintenance is Expected Defect When Main Component Needed I tenance is performed I Frame not sitting flush on top slab, i.e., sep- ting flush on aration of more than 3/4 inch of the frame the riser rings from the top slab. Frame not securely or top slab I attached and firmly attached. Basin Maintenance person judges that structure is replaced or I unsound. repaired to Fractures or design stand- Cracks in Basin Walls/ Grout fillet has separated or cracked wider than 1/2 inch and longer than 1 foot at the ards. Bottom joint of any inlet/outlet pipe or any evidence Pipe is I of soil particles entering catch basin through regrouted cracks. and secure at basin wall. Basin Settlement/ If failure of basin has created a safety, func- replaced or i Misalignment tion, or design problem. repaired to design stand- ards. iNo veget- Vegetation growing across and blocking ation block- more than 10% of the basin opening. ing opening I . to basin. Vegetation Vegetation growing in inlet/outlet pipe joints that is more than six inches tall and less No veget- �` than six inches apart. ation or root growth present. 11, Contamination �� See Detention Ponds (No. 1). No pollution and Pollutionpresent. Cover Not in Cover is missing or only partially in place. Catch basin Catch Basin Place Any open catch basin requires main- cover is tenance. closed Cover Locking Mech-Mechanism cannot be opened by one main- Mechanism anism Not tenance person with proper tools. Bolts into opens with I 2014 Stormwater Management Manual for Western Washington Volume V-Chapter 4 -Page 839