06-22-99 PTRC - Laserfiche WebLink

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• Arden Manor Park Rehabilitation Concept General Park rehabilitation to include construction of an expanded play structure, a full court basketball facility and relocation of an existing picnic shelter. Flood control enhancements to include construction of a floodway drainage swale between the pond within the park and an inlet which exists at the southeast corner of the park. Also constructed in association with the drainage swale will be a land bridge over the swale that will connect park facilities to the access drive and office complex which serves the park. Grading and landscape improvements will generally reflect the need to elevate park facilities above demonstrated flood levels and buffer the setback zones between park facilities and residences. Some miscellaneous park features such as benches and trash receptacles should also be considered. The following is a breakdown of each facility described in further detail: A. Play Structure The existing play structure has been sited in the middle of the park. As the smallest park feature, it seems disconnected from the other non -field sport activities. Locating the play structure closer to the park office and emergency first aid facility will enhance user safety. Existing shade trees within the new location will also enhance use of the new facility. Expansion of this facility from 625 s.f. to 4,000 s.f. would provide better play value and allow for greater demand. A hard surface accessible path from the structure to an emergency access route is also recommended. B. Basketball Court The existing half court is a fenced facility with bituminous pavement. It is one of the more popular use areas that exist among them all. It may be possible to let it remain and avoid costs associated with a total replacement. The layout in that case would be restricting the area planned to provide flood protection. The proposal therefore is to relocate it to higher ground and pave it in concrete which will provide a better slip resistant surface and one that is more cost effective over time. The new location will remain close to the office and will also be accessible from the proposed land bridge. Salvaging fence fabric should be considered. C. Open Channel Floodway Flooding is a chronic problem for the park which affects park use during peak season. As much as one third of the park can be covered in water during a common flood event according to the residents. The pond currently utilizes an outlet system that depends upon a 200', 10" diameter corrugated metal pipe installed more than twenty five years ago at a minimum slope in this case that has likely silted in by now. A supplemental ditch has been provided along the west side of the existing court facilities but the indirect route will not handle the volume of flow in an efficient manner and divides the park uses further. The proposed swale will replace the existing pipe and provide a maintainable solution to increasing flows over time. A land bridge will span the swale utilizing drainage culverts sized to a capacity no less than the existing structures draining the park to Round Lake. D. Existing Picnic Shelter The steel frame picnic shelter provides an enhanced picnic opportunity and should remain a part of the park. Its elevation and relative proximity to the pond have placed it within flood prone areas. Its current ground elevation is approximately 896. Proposed grading will elevate the other park facilities to approximately two feet above this elevation. A minimum recommendation is to raise the structure higher and infill around it. This would then require the grades in the current picnic shelter location to be raised also. Further recommendation is to relocate the shelter closer to the other proposed park facilities to consolidate the proposed area to receive fill. A new concrete slab under the shelter is included in the 4Dpreliminary cost estimate.