N. - Stormwater.

Developers are encouraged to connect to a master stormwater system, rather than providing an on-site facility. If a master stormwater system is anticipated, site specific ponds shall be removed and connection to the master system shall be required. Until such time as a master system is available, development is subject to the following requirements:

1.

All retention areas shall be incorporated into the overall design of the project.

2.

Wet stormwater areas shall be designed as amenities (see Figure 48). Features such as fountains or aerators are encouraged to accent the ponds and provide adequate aeration to prevent stagnation and fish kills. Other features may include bridges and boardwalks.

3.

Wet bottom ponds in character zones other than Neighborhood and Employment may only be allowed subject to Special Exception approval.

4.

Landscaping is required to soften the visual appearance of wet retention pond edges. Native trees and shrubs shall be used. No exotic invasive plants are permitted.

5.

Where slopes require fencing, only ornamental metal will be allowed.

6.

To reduce the size of stormwater ponds that are not designed as amenities, the use of porous concrete, underground storage, and exfiltration is greatly encouraged. Each of these options may increase the amount of developable land or undisturbed open space.

Figure 48. Example of Integrated Retention Areas