Agenda - Public Works Committee - 02/21/2012

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July 2011 Stormwater Visits Potential Solutions Water appears to be contained within the existing drainage & utility easement. Private improvements to improve lot drainage. No further action. Water appears to be contained within the existing drainage & utility easement. No further action. No further action. No further action. No further action. No further action. No further action. No further action. No further action. No rear yard drainage & utility easements present - wetland at low point on adjacent lot to the south (also not encumbered by drainage & utility easement). Re -ditch boulevard areas and/or reshape property to allow pass through drainage to the wetland. Potential for downstream relief if wetland creation/banking project by private property owner is advanced. Additional information and evaluation is necessary to formulate a recommendation. 7c1:1 M Advised property owner of potential improvements to improve drainage away from their foundation (fill and/or draintile installation). Water contained within existing drainage & utility easement on property. Several trees show signs of stress and may be lost, both on private property (easement) and within the park. Corrected neighbors driveway with minimal paving to keep street runoff in the right-of-way and directed to the storm sewer. Property owner installed some natural barriers to slow down and prevent overland flow from neighbors property. Property owner pumped water over roadway into ditch along the north side. City staff cleaned the culvert under 164th, and the ditch to the north to direct water into the adjacent ponding area. Instructed home owner that we couldn't assist with an elevated water table, and they should contact Anoka County to discuss ditch drainage in area (County Road 27). Water contained within existing drainage & utility easement on property. Verified downstream culverts were open & flowing Water contained within existing drainage & utility easements. Staff verified outlet structure and downstream system was free of obstructions. It appears as if the deck was built into or near the existing drainage & utility easement. Water is contained within the easement, but may be backing up through the system from Sunfish Lake due to high water conditions. County ditch issue (County Road 63) Surface water subsided, but still experiencing water in basement due to high groundwater. Property owner cleaned culvert in front under driveway (severely deteriorated). City verified that the culvert was free of obstructions under 167th, and removed debris from the downstream channel along the west side of Elmcrest Park. The property owner south of 167th is currently evaluating the opportunity to develop wetland banking credits, which would increase downstream capacity, and he is willing to share the results of his hydrologic study for the area. Observations Water standing in back yard, lower than drainfield. Some water inside under front step. Water visible under floor in back through open plumbing trench. Observation of yard indicated grades slope towards house in several locations corresponding to water observed inside. Backyard drains to Fox Park. Fox Park Boardwalk approaches are under 3" of water, water pushed up through boards while walking on it. No outlet for this wetland. Water standing in back yard, lower than drainfield. Ponded water is in Woodland Green Park Street runoff from recently completed paving project flowing down neighbors driveway and settling in low point adjacent to the house. Water standing in rear and side lot drainage & utility easement. Experiencing flooding in the basement of the home. No standing surface water; presumably an elevated water table. Property owner wanted to know if we could improve ditch flow and/or install storm sewer into the recently completed work on Ute St. Standing water in rear yard pond and drainage & utility easement. Concerned water would continue to rise into home. Standing water in rear yard pond and drainage & utility easement. Concerned water would continue to rise into home. Resident concerned with high water in rear and side yard, encroaching near deck. Property owner expressed concern with ditch drainage (and wetland discharge from the north) running through the property and causing erosion to their pond outlet prior to discharge to County ditch #27. Split Entry Walkout. Water standing on basement floor during visit. They removed all carpeting and sheet rock on block walls. Water came in at front wall at joint between block and slab. Observation of yard and discussion indicated water from roadside ditch rose and flowed towards house. Minimal grade change between bottom of ditch and grades at house. Potential solution, regrade ditch to drain to south property line, around mound system and into back yard. Backyard has standing water, this is north end of wetland/ storage area. Outlet is culvert under 167th Avenue. Observed Culvert, standing water visible at both ends, wetland south of 167th is Jon Peterson's proposed wetland banking area. It does not have an overland outlet. **** Homeowner is pursuing a claim against City for water damage in basement. Owner Stromenger, Tom & Trish Moravetz, Paul & Carolyn Gary Solmonson Sarah Chamberlain Bruce Saba Candie Hansen Green Valley Greenhouse m _a). I 06 ) 0 0 E co Address 17159 Potassium Street 15611 Barium St 5520 152nd Avenue 5540 164th Lane 4925 179th Lane 5630 148th Lane 5671 156th Lane 6180 145th Lane 6530 Green Valley Road 16756 Sodium Street