04/29/1996 Council Packet - Laserfiche WebLink

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The new school will be connected to the public water system which services the City of Lino Lakes. City staff have determined that the proposed new extension of the system is adequate to handle the needs of the new school facility. 14. Water -related Land Use Management Districts Does any part of the project site involve a shoreland zoning district, a delineated 100 -year flood plain, or a state or federally designated wild or scenic river land use district? ElYes5E1No If yes, identify the district and discuss the compatibility of the project with the land use restrictions of the district. 15. Water Surface Use Will the project change the number or type of watercraft on any water body? DYesliNo If yes, indicate the current and projected watercraft usage and discuss any potential overcrowding or conflicts with other users or fish and wildlife resources. 16. Soils Approximate depth (in feet) to: Ground water: minimum 9 average 13 Bedrock: minimum N/A average N/A Describe the soils on the site, giving SCS classifications, if known.(SCS interpretations and soil boring logs need not be attached.) The Anoka County SCS map shows the site as predominantly Zimmerman and Lino sands. They are not considered highly erodible. During construction, the contractor will use best management practices (BMPs) to prevent erosion and protect stormwater from sedimentation. Borings were taken to a depth of 20 feet below the surface. Bedrock was not encountered. 17. Erosion and Sedimentation Give the acreage to be graded or excavated and the cubic yards of soil to be moved: acres 52.5 ; cubic yards 80.000 Describe any steep slopes or highly erodible soils and identify them on the site map. Describe the erosion and sedimentation measures to be used during and after construction of the project. See #16. 18. Water Quality - Surface Water Runoff a. Compare the quantity and quality of site runoff before and after the project. Describe methods to be used to manage and/or treat runoff. The project will include construction of one new on-site pond to handle runoff generated on the site. The pond will be constructed on the back (northwest side) of the new building to collect runoff from the parking lot and the building roof. The pond will include skimmers and velocity control for the outlets. The drainage system design is based on calculations and the premise of producing a minimal increase in runoff from the site. An additional pond is proposed. It will be constructed by the City on property immediately east of 4th Avenue. This pond will collect runoff from the building and the parking lot. b. Identify the route(s) and receiving water bodies for runoff from the site. Estimate the impact of the runoff on the quality of the receiving waters. (If the runoff may affect a lake consult "EAW Guidelines" about whether a nutrient budget analysis is needed.) The natural drainage pattern of this site conveys the stormwater to the wetland, which outlets to the ditch and to the culvert under I -35W. The water quality pond outlet will control the flow near the existing runoff rates. 19. Water Quality Wastewaters a. Describe sources, quantities, and composition (except for normal domestic sewage) of all sanitary and industrial wastewaters produced or treated at the site. This project will generate normal domestic sewage at an estimated, rate of 21,600 gallons per day when school is in session (based on 12 gallons per student per day). The new school will be connected to the City system. The ISD#12.EAW -4-