09-18-2000 Planning Packet - Laserfiche WebLink

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Secondly, the cul-de-sac has been shortened 40'. This allows the building sites for lots 2 and 3 to be located closer to the top of the hill and where the land is flatter allowing for a more usable back yard. The primary reason for relocating the building sites was the ravine located edong the south property line of Lot 2. The developer has created a drainage swale behind the building pads on Lots 2 and 3 to redirect stormwater runoff from the houses to the storm water pond on Lot 1. In a letter, dated September 11, 2000, by Barr Engineering (consultant hired by a group of neighborhood residents) it was noted there are several maple trees located at the west end of the ravine that should be protected. In response to the concerns addressed by the neighborhood, the developer has relocated the stormwater pond to the west to protect any mature vegetation around the ravine. The following is a list of concerns the developers were provided with regarding the original plan. Many of the concerns have been addressed by the plan revisions submitted by Mark Gronberg, Coffin & Gronberg, dated September 12,2000. 1.The property has a number of sensitive natural features that should be protected and managed when the property develops. The northerly ravine, proposed as Outlot A, would be protected by placing a conservation easement over that area. Proposed Lot 2 is proposed to include some regrading to help redirect storm water to the NURP pond located on Lot 5. Some of the grading is in the proximity of a drainage ravine located along the south property line of Lot 2. Staff has discussed this issue with the developer and recommended the common property line between Lots 2 and 3 be shifted to the north to allow the building site for Lot 2 to move awav from the drainage area and ravine. (Plans have now been submitted) 2.All drainage off the structures that would be located on Lots 2 and 3 should be redirected towards the cul-de-sac where the drainage would enter the storm sewer and flow towards the northern NURP pond. The concern is draina;^? from the structures would be concentrated towards Wildhurst and could impact the stability of the slope and drainage towards the lots east of Wildhurst Trail. j.Protection of the wooded areas along Wildhurst and protection of the ravines would be accomplished through the granting of conservation easements over those areas. A conservation easement would be granted over the east half of Lots 2 and 3 to protect those areas from removal of vegetation and land alteration. Additional easements would protect the two drainage ravines. 4.The proposed grading plan reduces the existing drainage area to the southerly ravine by about 2.5 acres. Storm sewer will redirect this drainage area to the north pond where the gradient is half as steep as the south ravine. The City Engineer has reviewed the drainage calculations 12596 Brenshcll Homes 1181 Wildhurst Triil Subdivision Page 2 i