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BONESTROO AND ASSOCIATES <br />1/1 Bonestroo <br />Rosene <br />Anderlik & <br />Associates <br />Engineers & Architects <br />©612 6361311 02/18/97 14:55 0 :01/02 N0:887 <br />Won^ittoo. Ifosent. And^rUk *^nd Asiecistti. Inc $t sn A/hrmjiVyt Action 'f Qu»l Opportunity {mptcyer <br />Principals Otto C Borettroo. Pf • Joseph C Anderhk PE • Marvin L Sofvat^ PE • <br />RiCh^rtfE Turner, F£ • Glenn R Cook P£ • Tnomei E Noyes Pi • Pobrrt G • pF • <br />Jf^y A Bourdon. FI • Woeerr W Rosene. PC end Susan M €oe'i<n C PA. Scn*oi Cuniu'tenfi <br />Associate Princip»^is Howard A Sanford. Pi • Kfftn A Gordon. P£ • Robert R Pfefferle. PI • <br />RiC».#rd W Poster. PE • Oavd O loskora Pi • noberf C Ruisek. AI A. • Mark A Manson. Pi t <br />Michaef T Rautmann. RE • Ted K P.eid. PC • Kennetn P Anderson. PE • Mark R Rolfs PE • <br />Sidney P. WiiuaTSSon. PC.. IS* RoOea F Kotimith <br />Offices St Paul. Rochester. >v*iiniar ar»d St Cloud MN • MeQuon. wi <br />February 19, 1997 <br />Mr. Ronald Moorse, Administrator <br />City of Orono <br />Post Office Box 66 <br />Crystal Bay, Minnesota 55323 <br />Re; Spring Hill Golf Club <br />File No. 139-2209 <br />Dear Ron, <br />We have reviev^ed the Environmental Assessment Worksheet (EAW) submitted for the proposed Spring <br />Hill Golf Club Located north of Spring Hill Road and east of Tamarack Drive in the cities of Orono and <br />Medina. We offer the following comments in regards to engineering issues. <br />Water Quality: A turf management program should be established to reduce the amount of excess <br />nutrients leaving the site. The program should be aimed at minimizing the amount of fertilizer applied. <br />This can be accomplished by taking soil tests and applying only the spccfic nutrients that are indicated as <br />inadequate <br />The referenced study done by John M. Barton includes data from only four golf courses. The results of <br />the study indicate that golf cour.ses have less nutrient loading than undeveloped conditions based mainly <br />on the premise that runoff volumes are decreased. The runoff volumes on this project are expected to <br />increase from 120% to 175% over existing conditions. The applicant should provide additional <br />information or studies to support/validaie the water quality assumptions used in their report. Also, the <br />type of grasses proposed on the golf course should be identified as they will have an impact on the <br />nutrient budget. <br />Traffic: The trip generation rates in the EAW show' a daily volume of 250 and a PM peak hour volume <br />of 50. Trip Generation Report published by ITE reports that daily trips would be 675 and PM peak hour <br />trips would be 60. Although the EAW numbers are low. the higher number would not have a negative <br />effect on roadway capacity. <br />Existing volume data for CSAH No. 6 should be available from Hennepin County. We recommend that it <br />be obtained and included in the EAW. An investigation of the need (driven by safety considerations) for <br />an exclusive left turn lane for westbound traffic on CS.AH No. 6 at the east intersection with Spnng Hill <br />Road should be made. This turn lane will likely be required in the future, now may be the time to have it <br />constructed. <br />The intersection of Tamarack Drive and CSAH No. 6 is of particular concern due to the poor sight lines <br />a .d the high speed of oncoming traffic. Safety improvements nny be needed in the area of the <br />i: tersection which may include turn and by-pass lanes and a lowering of the nearby crest vertical curve. <br />The proposed tunnel should be looked at carefully to consider any future design changes to CSAH No. 6. <br />2335 West Highway 36 • St. Paul, MN 55113-3898 ■ 612-636-4600