08/26/2014 - Laserfiche WebLink

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One way to decrease the total impervious surface area for Alternate 4 would be to swing the sidewalk out from the back of the curb for a distance of at least 200'. This would eliminate 1500 SF of impervious surface (200'x7.5'), which would result in a stormwater permit not being re- quired. The resultant sidewalk adjacent to a 5' vegetative boulevard would not count towards the total impervious area. A 7.5' wide sidewalk with a 5' boulevard can be constructed between stations 3+40 and 5+40 without the need for any retaining walls or temporary easements from the property owner (Brandychase). This would bring the total project impervious area just below the 10,000 SF threshold. The City Engineer recommends bringing the project under 10,000 square feet of impervious surface to avoid the need for a watershed district stormwater permit. A five foot grassy boulevard would be constructed for approximately 200 feet on the Brandychase block. This is possible to do without Brandychase's consent to a temporary construction easement agreement. The City Engineer doesn't expect the change to make a difference in the price and may even lower the overall cost as there would be less concrete through the area in question. They are confirming this with Concrete Ideas and I should know by the meeting. The alternative would be to try to convince the watershed district that their rules don't literally say what they are requiring of the City. They may not be swayed by this logic and debating with them may slow down the project or push construction to next year. In the end this isn't a big change but I wanted to run it by the Council. The grassy area will also provide space for signage, some area for snow storage, and space for a City monument/sign in the future. Let me know what you think.