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3-2 <br />/'�'1+i <br />2. On -site basins have been encouraged which has resulted in large <br />numbers of small facilities scattered over developments. <br />3. Detention basins are often designed with steep banks where vegetation <br />is difficult to establish and maintain. <br />4. Often outlet structures are very small to limit runoff, but they are <br />also prone to clogging which results in stagnant pools of water re- <br />maining for long periods of time. <br />5. Detention basins become the depository for sediment and urban Litter. <br />6. Weed control is a major problem, especially in facilities which do <br />not drain dry after each storm event. <br />7. Fences and landscaping used to keep children out of the detention <br />area are often damaged and/or destroyed. <br />These maintenance problems are the cause of several related health and ` <br />safety problems. �ijs►' <br />1. Improperly designed and maintained basins, coupled with the clayey <br />soils of the Atlanta area, results in detained water not percolating <br />into the ground and pools of water remaining for long periods of time. <br />2. The stagnant pools and moist ground become ideal places for mosquito <br />breeding and attract rodents and other posts. <br />3. Safety becomes a problem, especially in residential areas where the <br />basins are not visible from homes because of their remote locations. <br />4. Detention basins are not good places for neighborhood children to play,.. <br />because of their tendency to collect sediment and litter. <br />5. During storm events, the velocity of water leaving a basin can be <br />hazardous. <br />,M <br />