Laserfiche WebLink
NORTHWESTERN COLLEGE MASTER PLAN <br />STORMWATER MANAGEMENT STUDY <br />I. EXECUTIVE SUMMARY <br />Nazareth Hall Preparatory Seminary opened in September 1923 as a four-year high school <br />and two-year junior college for candidates for diocesan priesthood. Its 87 -acres were <br />purchased from the Archdiocese of Saint Paul/Minneapolis by Northwestern College in <br />1970. <br />Today, the College's natural environment is largely a function of its two lakes, Johanna and <br />Little Johanna, which occupy a large part of the total land area of the campus. Both lakes <br />are identified as impaired on Minnesota Pollution Control Agency's March 31, 2004, <br />proposed Total Maximum Daily Load (TMDL) list. Lake Johanna is classified as eutrophic <br />and exhibits water levels from a high of 881.27 feet on July 3, 1978, to 870.35 feet on July <br />21, 1926, or a range of 10.92 feet, and its Ordinary High Water level is 878 feet. Little Lake <br />Johanna has very little published information. <br />This Plan presents a campus -wide Stormwater Management strategy that identifies Best <br />Management Practices that can be implemented to facilitate the campus redevelopment. <br />The overall goal is to cooperate with appropriate agencies including the Cities of Roseville <br />and Arden Hills, Rice Creek Watershed District and the Minnesota Pollution Control <br />Agency to improve the quality of both of the campus lakes. Achievement of these goals will <br />deliver good quality stormwater runoff from the campus to lakes and wetlands at <br />acceptable rates and volumes, while reducing pollutant and sediment loadings and stream <br />bed/stream bank erosion and water quality degradation. <br />Stormwater quality and quantity Best Management Practices (BMPs) that seem particularly <br />appropriate for the campus include: wet detention ponds; pollution prevention such as <br />material storage control, turf management, parking lot cleaning; pervious pavements to <br />reduce the amount of runoff; infiltration practices and filter devices which primarily trap <br />solids that have pollutants attached to them. <br />In some respects, the implementation of the Plan described in this document will resemble <br />a Stormwater Pollution Prevention Plan (SWPPP) that the National Pollutant Discharge <br />Elimination System (NPDES) program requires of many Cities including Roseville and <br />Arden Hills. Such a plan has six elements: <br />Northwestern College Master Plan 1 13529.000 <br />Stormwater Management Study <br />