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<br /> Bonestroo,Rosene,Anderlik and Associates,Inc.is an Affirmative Action/Equal Opportunity Employer
<br /> Bonestroo and Employee Owned
<br /> Principals:Otto G.Bonestroo,P.E.•Marvin L.Sorvala•P.E.•Glenn R.Cook.P.E.•Robert G.Schunicht•P.E.
<br /> ® Rosene Jerry A.Bourdon.P.E.
<br /> Anderlik& Senior Consultants:Robert W.Rosene.P.E.•Joseph C.Anderlik,P.E.•Richard E.Turner,P.E.•Susan M.Eberlin,C.P.A.
<br /> Associate Principals:Keith A.Gordon,P.E.•Robert R.Pfefferle•P.E.•Richard W.Foster,P.E.•David O.Loskota,P.E.
<br /> Associates Mark A.Hanson,P.E.•Michael T Rautmann,P.E.•Ted K.Field,P.E.•Kenneth P.Anderson,P.E.•Mark R.Rolfs.P.E.
<br /> David A.Bonestroo,M.B.A.• Sidney P.Williamson,P.E.,L.S.•Agnes M.Ring.M.B.A.•Allan Rick,Schmidt,P.E.
<br /> En sneers&Architects Thomas W.Peterson,P.E.•James R.Maland•P.E.• Miles B.Jensen,P.E.• L Phillip Gravel III,P.E.• Daniel J.Edgerton,P.E.
<br /> g Ismael Martinez,P.E.• Thomas A.Syfko•P.E.•Sheldon J.Johnson• Dale A.Grove,P.E.• Thomas A.Roushar•P.E.
<br /> Robert J.Devery,P.E.
<br /> December 24,2002 Offices:St.Paul,St.Cloud,Rochester and Willmar,MN•Milwaukee,WI•Chicago,IL
<br /> Website:www.bonestroo.com
<br /> Mr.Lyle Oman
<br /> Building Inspector n� *+
<br /> City of Orono t
<br /> Post Office Box 66 (ylLN-0 i�; - ,;.•'
<br /> Crystal Bay,MN 55323 2 S Tr-_'jV::_F1JCA
<br /> Tf1+rl✓ DEC 9 7 Ar'nPI
<br /> Re: Robert Suess Pond Grading Inspection
<br /> BPA File No. 139-02-000 �4b 1*1 t Mlj S535b c f`t iii=C.1R0pj,0
<br /> Dear Lyle: Ve41744-'�5
<br /> r
<br /> On Thursday December 19, 2002 we inspected the pond on the Robert Suess property, Lot 8, Block 1,
<br /> ?Meadow Wood Pond. The pond discharges to an existing ditch along the west side of Truffula Trail.The ditch
<br /> then conveys flows northerly across Lot 7, Block 1 to an existing culvert under Truffula Trail. We have the
<br /> following observations regarding engineering matters.
<br /> • The fill placed between the south edge of the pond and the island F,Ws been removed.
<br /> • Pordirg calcutatiuns dated 4-13-00 submitted by Mark Gronberg show a 5.2 acre drainage area reaching
<br /> the pond. The calculations provided indicate that pond discharges for the 1-year through 100-year storm
<br /> events will range between 0.44 cfs to 4.15 cfs (assuming the fill paced in the pond is removed as not:d
<br /> above). The correspopding pond water elevations range between 1023.57 to 1025.28. The pond
<br /> caiculations assume the pond is full of water at all times. The pond typically is not full and the water
<br /> elevations are generally lower than the outlet elevation of 1023.2. If the pond is not full of water when a
<br /> storm event begins the pond outlet flows and water elevations will be less than those s.lown ir. the
<br /> Cal-ulHt:ORs.
<br /> • The outlet flows and pond water elevations are acceptable and do not appear to pose a risk to neighboring
<br /> properties.
<br /> • Fill placed between the pond outlet and the driveway on Lot 7,Block 1 is obstructing flows and should be
<br /> removed immediately.
<br /> • The downstream ditch to the north (Lot 7, Block 1) along the road appears to have a high point located
<br /> midway between the driveway and the culvert under the road.The ditch slows drainage to the north and
<br /> promotes infiltration of storm water, an environmentally friendly situation. A disadvantage to slowing
<br /> s;orr,, Nater and promoting infiltration is the inability to maintain a manicured lawn during wet tines of
<br /> the year. Drainage across this neighboring property could be improved if the ditch was graded to remove
<br /> tale high point. We would expect the removal of the ditch high point to create a ditch similar to the ont;
<br /> immediately across the street or.Lot 3,Block 1.
<br /> Please contact me at(651)604-4863 if you have any questions regarding this matter.
<br /> Yours very truly,
<br /> BONESTROO.ROSEIIE, ANDERLIK&ASSOCIATES,INC. s A z-t2
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<br /> 2335 West Highway 36 ■ St. Paul, MN 55113 • 651-636-4600 • Fax: 651-636-1311
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