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Peak pond outflow rates given in Appendices C and D are based on discharge through a pipe or special outlet structure with the pond at high water level. In the case of a two-stage or other , rype of outlet, suitable computer modeling of the final design is required. The following discussion of individual drainage districts identifies certain water quantity and water qualiry issues. Since 2002, some new issues have been identified. These have not been added to the narrative here but rather have been identified separately within the issues and corrective actions summary and the implementation plan. Additionally, some observations from the ensuing narrative do not constitute and are included for information purposes only. 5.2 BROWNS BAY Browns Bay is in southeastern Orono and has a drainage area of 408 acres. The Woodhill Golf Course occupies a majority of the district. The following is a summary of special issues and recommendations for this district. BB-P9 — During the 100-year storm event, the adjacent driveway will aid as an emergency overFlow to prevent structural damage to the nearby homes. It is recommended that the driveway remain at its current elevation. This overland drainage is directed into the golf course. BB-P15 has a 100-year HWL of 933.7, which results in Fox Street being overtopped by approximately 3.5 inches. To alleviate the flooding it is recommended that Fox Street be raised by one foot. 5.3 CARMAN BAY Carman Bay district is located in the southern portion of the City and has a drainage area of 146 acres. Drainage from this district drains directly into the bay by overland drainage or through pipes. Following is a summary of the special issues and recommendations for this district. CB-P2—The parking lot located just to the north of this ponding area may have minor flooding due to larger storm events. CB-3 — Drains directly into Carman Bay, currently causing sedimentation and erosion control problems. This pipe network drains a large amount of impervious surfaces. To decrease the amount of pollutants entering Carman Bay, it is strongly recommended that a multiple cell water quality pond, or equivalent functional feature, be installed. CB-P7, P8, P9 —All of these ponds have been studied in the Kelly Avenue Drainage Report, January of 1995. The report suggests utilizing a small lift station to remedy the flooding problems. CB-P11 —This small depression is located in a park. It is recommended that both a water quality and quantity pond be constructed to treat the runoff from this district prior to discharging directly into the lake. Within this area there are previously identified nuisances and drainage issues, usually yards that do not drain well. However these are private issues and not municipal issues. 5.4 CRYSTAL BAY Crystal Bay district is located in the south central section of the City and has a drainage area of 22 acres. Most of this district is located along shoreline and drains directly into the bay. The following is a summary of issues and recommendations for this district. City of Orono Page 53 Surface Water Management Plan �Bonestroo 000139-09034-0