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Home My WebLink AboutCC RES 99-021 A RESOLUTION AUTHORIZING WSB & ASSOCIATES, INC. TO PREPARE A FEASIBILITY STUDY RELATING TO SILVER POINT PARK Meeting Sheet 111111 1 11111111 11I 104883 Box: 31 Folder: RES 1999 Document: CC RES 99-021 A RESOLUTION AUTHORIZING WSB & ASSOCIATES, INC. TO PREPARE A FEASIBILITY STUDY RELATING TO SILVER POINT PARK CITY OF ST. ANTHONY RESOLUTION 99-021 A RESOLUTION AUTHORIZING WSB & ASSOCIATES, INC. TO PREPARE A FEASIBILITY STUDY RELATING TO SILVER POINT PARK BE IT RESOLVED, that the City Council of the City of St. Anthony, in its continuing efforts toward flood mitigation for the City of St. Anthony, hereby authorizes the engineering firm of WSB & Associates, Inc., to prepare a feasibility study on the capacity of the Silver Point Park expansion possibilities, referencing Options 1, 2, and 3 in their memo to the St. Anthony Council dated February 2, 1999 and attached hereto. • Adopted this �' day of , 1999. Mayor ATTEST: nX,,:1� City Clerk 11 Reviewed by Administration: 4 1/ j hL City Manager - B.A.Mittelsceadt,P.E. 350 Westwood Lake Office Bret A.Weiss,P.E. IIGy�B 8441 Wayzata Boulevard Peter R.Willenbring,P.E. Minneapolis, MN 55426 Donald W Sterna,P.E. Ronald B.Bray,P.E. • 612-541-4800 &Associates, Inc. FAX 541-1700 Memorandum To: Honorable Mayor, City Council and Staff City of St.Anthony From: Todd E. Hubmer,P.E. Peter R. Willen bring,P.E. Date: February 2, 1999 Re: Response to Questions Relating to Silver Point Park WSB Project No. 1065.40 We have prepared the following answers to the questions you requested in your memo from January 27, 1999. 1. What is the difference in price of the pipes for Wilson -36"versus a 72"? • Preliminarily,it is anticipated that the cost to construct the 72-inch system from 29''Avenue to 27' Avenue would be at a minimum of$700,000 over the cost for the existing storm sewer system in Wilson Street. Furthermore,this system would not be in alignment with the downstream storm sewer at 27h Avenue,and conflicts with other utilities will be a significant issue. 2. What is the capacity of the Silver Point Park expansion possibilities? Attached,please find a figure showing three possible options for expanding Silver Point Park improvements, as previously discussed. These options are as follows: • Option No. 1: Acquire four homes and easements for three properties immediately south of Silver Point Park. This option would provide an additional 2.44 acres of land for storm water storage. This option would add 15 acre-feet to the 24 acre-feet of storm water storage now proposed with Silver Point Park. • Option No. 2: Acquires six homes and easements over three backyard areas immediately south of Silver Point Park. In addition,Trillium Park could be utilized and reconfigured along with the frontage road to provide storm water storage. This option provides an additional 5.34 acres of land for storm water storage. This option • could provide approximately an additional 27 acre-feet of storm water storage. M i n n e a p o l i s • S t . C l o u d FAWPWIMI065.40\020299-hme.wpd Infrastructure Engineers Planners EQUAL OPPORTUNITY EMPLOYER Honorable Mayor, City Council and Staff • City of St.Anthony February 2, 1999 Page 2 • Option No. 3: Acquire six homes south of Silver Point Park and along the frontage road of County Road (CR) 88. This option provides approximately 4.27 acres for storm water storage. This option also utilizes the existing frontage road and Trillium Park for storm water storage. It is estimated that approximately 20 acre-feet of additional storm water storage could be provided within this area. 3. If the large pipes (72") have 100 year flood protection, how much smaller can the pipes be without decreasing the flood protection in Alternative No. 1, as stated by D. Palmer? As indicated by Mr. Palmer, an overland/overflow route does exist along Wilson Street to 29th Avenue. From there,water continues south to the alley north of St. Anthony Boulevard, proceeding to the east,then south along the parcel the City has acquired on the north side of St.Anthony Boulevard. It is anticipated that if the overland/overflow route was maximized, the pipe sizes upstream of St. Anthony Boulevard and Wilson Street may be reduced by one or maybe two sizes. Maximizing the overland rate would require special structures to be constructed in the vicinity of St. Anthony Boulevard or Pahl Avenue to collect this water and convey it to the • storm water storage area. This option would increase the risk of damage to homes in the Pahl Avenue and St. Anthony Boulevard areas by routing significant volumes of water overland. 4. How much wetter will Silver Point Park get if the Harding Pond is not completed? Silver Point Park will be subject to inundation for rain storm events greater than one inch in 24 hours. In addition, for those storm events such as the one-year, two-year, and five-year rainfall events, water will pond to greater depths for longer periods of time. S. What, if any, are the situations that would cause Roseville's water to back up into Silver Point Park? The City of Roseville storm water connection north of County Road C has a drainage area of approximately 17 acres with two ponding locations prior to discharging into the City of St. Anthony system with an 18-inch RCP. The volume of runoff and rate at which runoff leaves the Roseville site is anticipated to have a minimal affect on the performance of the City of St. Anthony's storm sewer system tributary to District 6. If you have any further questions, I will be available at your February 2"d Task Force Meeting to discuss these issues with you. nm F\WPWM]065 40\020299-hmc wpd Honorable Mayor, City Council and Staff • City of St.Anthony February 2, 1999 Page 4 If you have any further questions, I will be available at your February 2"d Task Force Meeting to discuss these issues with you. run • • F\WPWIM1065 40\020299-hmc wpd `y; � '.Gai ` n�� *t4� + aa •� +3t ,. Tr ,�_, ' Y3 ' INe Of-W. , 24 �qar CyPVN 'L� fit 0 IM . .'-'" hrN�.,.,�';ts j"�;X.4'��.,�.'"a;�3`,'y? it��^•'�.'"" .`'. �r°,�`r^_"'_7; ��"'�-,t'� .-' '�',�' �..•'` \ns ^'L> -�?.i" / / / / u � / �/! / CJ. r•" 'v. w i�"W, 4a��xi 4��t��``" a '�r^r`G�ia��`� �7�,1•: �''-�� '45 / St OR, 4'rljp; we�'.1"S1ni" 'b' 4 tom'r`�S,a mgN A"M -1011M M N22,08 g�NEM r a / / \ LANDSCAPING—a: C o sr, 00 OPTION 1 2.44 AC \ OPTION 2 5.34 AC OPTION 3 4.27 AC &W Waalvrow Lake once St. Anthony, Minnesota 9"1 Weyzab Bmievaro WSB Mkneapoh,MN 55128 a�ss4»eoo FAX 541-17M Silver Point Park Expansion Options INFRASTRUCTURE - ENGINEERS - PLANNERS MB Project No. 1065.30