(a) Detention basins shall be free form, following the natural landforms. If such forms do not exist, the basin shall be shaped to emulate a naturally formed depression.

(b) Redistributing soils from basin construction to natural side slopes around the perimeter of the basin is encouraged. Side slopes are created to filter, redirect, or soften views of the basin. Total screening of basins is not required. Side slopes shall be varied to replicate natural conditions.

(c) Naturalized planting themes are required for basins. Trees and shrubs may be grouped in informal patterns to emulate the natural environment but may not reduce the volume of the basin. However, no trees, shrubs, or other large, woody vegetation on the embankment is permitted. The location and type of vegetation shall allow for access and regular maintenance.

(d) The ground surface of the basin and surrounding disturbed areas shall be covered with native grass mixture or other appropriate groundcover approved by the City Engineer. It is the intent to provide a natural cover that does not require regular mowing or fertilization.

(e) Vegetation and trees planted and established in connection with a detention basin shall be drought-tolerant, firewise vegetation permitted through an approved fire protection plan.

(f) 

(This is a free form basin that fits in the natural surroundings.)

(g) 

(This is not a free form basin and is without natural side slopes. Little or no vegetation has been established to give it a natural appearance.)