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~- ~ <br />CITY OF LA PORTS <br />• <br />T0: <br />FROM: <br />SUBJECT: <br />INTER-OFFICE ME:~i0R-1.\'DL~~t <br />Jack Owen, City Planager <br />L. Hodge, Director of Public 4lorks <br />J %:oerns, Graduate Engineer <br />Dr age <br />DATE: 07-01-82 <br />In the past, the City has allowed residents to install culverts across <br />entire property frontages. This work was performed by City crews, with the <br />citizen paying for material. There are several problems associated with this <br />practice. <br />The primary problem is maintenance. These culverts must be kept clean to <br />maintain flow and long runs of pipe are difficult to clean, especially if <br />objects are lodged inside. In addition, they are difficult to inspect for <br />obstructions and shifts in grade. If resetting the culverts becomes necessary <br />due to shifting or if it is determined that the culverts need lowered and/or <br />• sized larger, this requires digging up what the resident Holy considers part <br />of his yard, with the additional expense of clean up and landscaping. <br />Another problem associated with this practice is capacity. With a heavy <br />rain, once the water level fills the pipe, any additional water has nowhere to <br />go, and overflows upstream. This delays runoff, and could result in upstream <br />flooding. <br />It is recommended that the City declare a moratorium on this practice, with <br />the exception of commercial development. This moratorium ~vill prevent installation <br />of long runs of culvert which may soon require readjustment due to our ongoing <br />drainage maintenance program. The staff recommends that the moratorium remain in <br />effect until a specific and comprehensive drainage policy can be formulated by <br />staff for Council approval. <br />If you should have any questions, please advise. <br />• JJ/JLH/dsw <br />D/ <br />