2012-00959 - stairway to lake - Laserfiche WebLink

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` . r Melanie, I have reviewed the application for the proposed steps at 4051 Highwood Road and have the following comments: • The submitted survey does not show the impacts to the slope of the hill or what is being proposed for retaining walls. Because the steps are angled at a diagonal down the slope rather than going straight down, the existing ground will be approximately 1.5' across the 48" wide steps. If the installer is planning on setting the stairs to follow the existing grade, this will either require a 1.5' wall on the upslope side, filling on the down slope side, or a combination of both. More than likely a portion of the steps will be dug into the ground (upslope side)to the extend where the dirt dug out will be placed on the down slope side to balance it out. This is magnified even more with the 5' wide landing pad on the lower portions of the proposed stairs which will have a 2' existing ground difference. This will more than likely require a portion of the down slope side to be filled in or raised (retaining wall) or substantial grading on the upslope side. I would recommend having the surveyor do cross-sections for the stairs to show how the stairs will be placed /graded to fit the existing grade and show if there will be any retaining walls installed. • The proposed work will disturb more than 10 CY of material within the 0-75' zone so a CUP is required. • The plan does not show erosion control measures on the slope. Also pursuant to City code Sec 79-7 (b)(1) the applicant will need to submit an escrow in the amount of$2,000 for grading and erosion control. • A permit from MCWD may be required. Please contact me with any questions or concerns. Jesse Struve, PE Director of Public Works/City Engineer City of Orono (952) 249-4661 - Direct (952) 249-4616 - Fax http://www.ci.oron o.m n.us/ 3