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BONESTROO AND ASSOCIATES Bonestroo Rosene Anderlik & Associates Engineers & Architects May 6.1997 ©612 6361311 05/05/97 09:58 g :01/03 NO:775 0:>neUfOO ffoscnc. Anaerhk ,tna Aaocn^ra n «vi Afrtf/n.u>he Action tqutH Opportunity impioyet Pr#r»c/p,»/S Otto G Bonestroo PE • JOifpnC An.irrht Pf • L Sorv«»i;» PE • Ch^'d E Turr^cr PE • G'cnn R Coo* **E • Thorr?! E No^ej ®E • Robert 0 Sch^n PE • Jetry A Bou'don. P£ • Robert W Rosene RE *»nd Sus«tn ss edc 'i n C pa Senior Consu !.vncs Afiro*ifp Pr^nopA's Howl'd A S^nfo'd ^E • Ae tr A Gordon PE • Robert R Pteffene. PE • Ricnerd W Poster. PF • Oav »0 O LOSkOtH PE • Rcoerc C Ruise« Al A • M^r» A HAnsor>. PE • Micn^ei T Raurm^nn. Pt • led KP'fid Pk • Kenneth p Anderson Pt • Mark R Rolfs Pk • Sidney P Wi'iiamson. PE L S • Robert F Koism.ih Offices St *>aui. Rccneiter. Wiiima* a'^d Si C'oud MN • Vequer i*i Mr. Michael P. Gaffron Asst. Building and Zoning Administrator City of Orono Post Office Box 66 Crystal Bay, Minnesota 55323 Re: Spring Hill Golf Club File No. 139-2209 Dear Mike. Below you will find our comments pertaining to water quality impacts and forest impacts for the Spring Hill Golf Club in Orono and Medina. Forest Management Recommendations The Minnesota Natural Heritage Program has identified an area of good quality (BC Rank) maple- basswood forest (Big Woods Subtype) within the SW, NE of Section 26, Township 1 18N. Range 23W. This forest is dominated by large diameter sugar maple, red oak. white oak and basswood. The subcanopy consists of smaller diameter sugar maple. Based on DNR surveys, there is good regeneration of sugar maple within this forest community. The following general recommendations should be considered to reduce impacts to forest areas: It appears that buffer widths along wetlands are approximately 40 feet. Buffer widths should be wherever possible with the native big woods vegetation retained. Much of ihtt wildlife liabitat value of this .site is derived from the mixture of good quality big woods forest and wetlands. Maintaining the connectivity between the wetland and forest conuiiunities will help to retain these wildlife values as well as butter the wetlands from stormwater runoff. Avoid runoff or accidental application of fertilizers and pesticides to forest and wetlands. Introduction of fertilizers to forest and wetland ecosystems may encourage the spread of nonnativc and/or weedy plant species. Pesticides application may directly or indirectly result in significant declines in wildlife diversity. Landscaping should be designed to divert runoff from these areas to stonriwater treatment ponds. Both forest and wetland communities presently contain troublesome exotic plant species. According to DNR records and the Wetland Delineation Report (Schoell & Madson, 1997), purple loosestrife and common buckthorn and tatarian honeysuckle are present within the site. Generally, the greater the level of disturbance, the higher the potential for invasion by these species, therefore, disturbances within fore.'* and wetland areas should be minimized to the extent possible. On-going monitoring for these species should be carried out both during and after construction. If these species are detected, management measures should be taken immediately. Native plant materials should be utilized where”“r p *ible, particularly in the "rough" and along forest and wetland edges. Planting native shrubs along t?v. .orcst edges such as chokccherry, american hazel, 233S West Highway 36 • St. Paul, MN 55113*3898 • 612 636-4600