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05-10-99 agendaCITY OF RICHFIELD, MINNESOTA • Study Session Letter No. 15 Agenda May 10, 1999 Issue Statement: Stormwater alternatives to the Academy of Holy Angels pond at 66th Street and Pillsbury Avenue. Background: In response to a Council Member inquiry, City staff directed Pete Willenbring, WSB and Associates, the City's stormwater consultant, to prepare the attached memorandum. The 66th Street/PillsburyRvenue intersection was identified in the City's Comprehensive Surface Water Management Plan as a flooding problem area because of regular street flooding. Staff seeks to improve drainage in street flooding areas as opportunities, such as street reconstruction or redevelopment, present themselves. In summary, the alternatives are: 1. Continue to pursue shared use/shared cost pond with the Academy of Holy Angels (AHA). 2. Construct a pond in the HUB shopping center. 3. Construct an additional storm pipe to Richfield Lake. 4. Construct an additional storm pipe to Wood Lake. 5. Condemn AHA property for a City pond. 6. Do nothing except require the AHA to construct a pond to National Urban Runoff Program (NURP) standards. City staff is continuing to work with AHA staff to construct a shared pond on AHA property. Pete Willenbring states in the memorandum that this course of action continues to be the most cost effective from the City's perspective. In addition, there is another issue pertaining to the inability of AHA to grant the City a perpetual easement for the use of the drainage pond. The attached letter from Winthrop and Weinstine, attorneys for the AHA, addresses that particular issue. Recommended Motion: Discuss this drainage pond issue in order to provide staff with direction on how to proceed. Basis of Recommendation: 1. The City and AHA have discussed this drainage pond issue for several months. 2. The drainage pond issue at 66th Street/PillsburyRvenue must be addressed in some fashion with or without direct City participation. • 3. This is a point in these discussions that requires City Council feedback for future direction. Alternative Recommendation: . 1. None. This issue must be addressed in some manner. Discussion/Decision Mode: This Special City Council Study Session has been called by the Mayor to provide an opportunity to provide a timely review of this issue prior to taking any additional action. R ectfully submi ed, en L. Devich Acting City Manager SLD:cak L • hr~sB & Associates, Inc. 350 Westwood Lake Office 8441 Wayzata Boulevard Minneapolis, MN 55426 612-541-4800 FAX 541-1700 BA. Minetstcadt, P.E. Bret A. Weiss, P.E. Peter R. Willcnbring, P.E. Donald W. Sterna, P.E. Ronald B. Bray, P.E. Memorandum To: Michael Eastling, Director of Public Works City of Richfield From: Pete Willenbring, P.E. WSB & Associates, Inc. Date: April 29, 1999 Re: Review ofAlternatives Available to Manage Stormwater Runoff in the Vicinity of the Holy Angels Facility in Richfield WSB Project No. 1000.20 As a follow-up to our telephone conversation eazlier this week, we have reviewed the options that are available to manage Stormwater runoff generated from the Holy Angels Academy site as well as azeas that are generally tributary to the low point in 66th Street in the vicinity of its intersection with Pillsbury Avenue extended. As you aware, the Holy Angels Academy has submitted plans outlining vazious proposed improvements to the site and the City has been working with the Academy to accommodate the runoff from these improvements as well as attempt to manage stormwater runoff that may overflow into an existing depression on the Holy Angel Academy site immediately south of 66th Street. A review of the alternatives available to manage stormwater runoff in this general azea include the following: Continue to work with Holy Angels Academy to jointly accommodate both Stormwater runoff generated from their site as well as accept Stormwater runoff directed from 66th Street into a pond that is located on the Holy Angels site immediately south of 66th Street. Utilization of this pond is one of the most cost- effective ways to accommodate Stormwater runoff for both sites. The ponding azea on the Holy Angels Academy site is in the one-hundred yeaz flood plain and could not be utilized for other activities. • 2. Construct additional stormwater storage area(s) in the vicinity of the Hub Shopping Center or Rainbow Foods parking lot. Stormwater storage in this location would relieve some of the pressure on the 30-inch RCP storm sewer that carries water from the 66~' Street storm sewer system as it carries water from this low-point intersection north and then west to Richfield Lake. Minneapolis S t . Cloud F:\WPWtN\1000.20\042999me.wpd Infrastructure Engineers Planners EQUAL OPPORTUNITY EMPLOYER Michael Eastling, Director of Public Works i City of Richfield April29, 1999 Page 2 3. Construct additional storm sewer capacity to carry water from the 66th Street low point to Richfield Lake. This would involve the construction of over 2000 lineal feet of storm sewer which would need to be installed north from 66th Street to the intersection of 65th Street and Pillsbury Avenue and then west along 65th Street, crossing Lyndale Avenue and eventually draining into Richfield Lake. This is an extremely expensive alternative that would require significant portions of 65th Street to be reconstructed. We estimate the cost for this improvement to exceed $400,000. If this is an alternative you wish to further consider, please advise and we will provide additional refinement to this cost estimate. 4. Construct additional storm sewer to carry water from the 66th Street low point westerly to Woodlake along the 67th Street alignment. The cost for this alternative would be similar to Alternative #3. 5. Condemn the floodplain property in the vicinity of Holy Angels Academy and construct a formal stormwater storage area in this location specifically for the .purpose of accommodating stormwater runoff from areas within the City of Richfield. It is anticipated a significant stormwater storage area could be constructed for under $150,000 plus the cost for land acquisition. 6. Construct no-public improvement projects but simply require the Holy Angels Academy to provide on-site stormwater storage and treatment for stormwater runoff generated from its site. Base on an analysis of the 20~ acre site, it is estimated that 7.5 acre-feet of live stormwater storage would be required to accommodate runoff from this site, and 2.5 acre-feet of dead water storage should also be incorporated into the site to address treatment to Nation Wide Urban Runoff Program Standards. In summary, a number of alternatives are available to address the problems of street flooding in the vicinity of 66~' Street and Pillsbury Avenue. They include increasing the stormwater storage in the area by either constructing ponding areas on the Holy Angels Academy site, on the Hub Shopping Center site. They also include increasing the storm sewer capacity carrying water to Richfield Lake or Woodlake. The most cost-effective solution is to utilize the existing depression on the Holy Angels Academy site for both stormwater runoff from the Holy Angels Academy as well as to manage some of the street flooding and safety issues occurring on 66~' Street at its low point. If an agreement cannot be reached with the Holy Angels Academy for the dual use of this property, then it is recommended that the Holy Angels Academy be required to meet stormwater storage and treatment requirements for the entire parcel in conformance with F: \ W P W [N11000.20\04 2999 m e. wpd Michael Eastling, Director of Public Works City of Richfield April 29, 1999 Page 3 City standards. Furthermore, since this is an existing floodplain area, no filling or additional development could take place that would increase the volume of runoff generated from the parcel to this low point and no filling could take place on any property that is below the elevation of the low point in 66`'' Street which is at approximately elevation 836.5. If you have any. questions concerning this information or need any additional detail, please do not hesitate to contact me at (612) 512-9854. lv 1../ • F:\WPWINV 000.20\042999me.wpd 05-06-99 15:47 From-KENNEDY & GRAVEN +6123379310 T-323 P.OZ/OZ F-218 ~WYNTHROP ~' W$INSTINP n PROFES>IONAi nS50C)A'f10N 'MOMgs w ww1x6R KwRL b. R08DiSOh 5,~ ~y~Op SCUtT J. OONGOSU Attorneys ana CouJU~rlurs ar Law SUZgNhe m srSllxCY ,ONA7FlnN w ~ admOUn• Ao6eep' R vYFD1S7A+e PhTLn ). C4EEkFL 7RE~08 v ewru8ai0N OnA~L S. SCHLECx RrCy{A1tl)A. NOEL EDWnxB,. DRENTY~. JOHNC HOLPFr JUMN C. CRAM1AN AOCtxU CORDON 1EcrnsY n w.vSFl 3zoo Ml/1IIes~ta world tYadC Center aL GTHERINE POWCLL iJANlBL L. CURRF1l STkrah C. YOViEx LgUx1e ti KNOCkE 30 $ast Seventh Sueet sY6VRN E UtiR ,uu C rr.d2uP sTEea~.., sNYDEII uoYD w cnooAlS Tt1trIJ.,Y A SLOPffLD 30awThnw wLLUnMS MgR.tLv c yyuceFR MARk t ,onnsoh Saint Pav1 MtfLireou SS 101 nhunbw D. WCN CHwRt.Eai~C,cOnNWH17ER HARTxwl6a a&oona"''oLE' Tc! hone 651 29Q•K4Q(! ~ ( ) Arw A. CR YNE KgitS.lN x xALLL~y'[ DwvID r r8nx40N 7HOMni n tlOYD Fax (b51) 292-9347 a.uvCY L MoEascH ANDREW C SkIUGi iNOeueb M. nnxTi~ axHIeL ~. a2<k e nx CHxs7EtN 7t,wM JOSEPH P >tocrxs OwRxON C, yQJITlYOH ERSC J NYi/'ROM n~OMnY L SANrSW )gsON L BROwN )OHI; n ,~,,,,,,p 70wnht L. MAtxEN 3000 Dain RauYCh.eT PlaTa JULW n. sQVEfimgiV 1~~'~ F1as0:L IL ,]~qyy wrtDSgNC PwT61CA w, r+eeEn 60 SOLLth Sixth $tlGet ,,,w~ ~ ~~~ WCRID N NYbcx~: gLCllaLED vgIILJUrWV~o' Pnul w. MwRY.Ww1t0T 141LOOesota 55402 o!)S /41,Jit-ea Cetn1G S. xRUMMEN UxVlu E MORwN n 0 ~rNC n. aRANOT ,Ng65w DffRlCVati . p Tc]2phOI)c (013) 347.74(1 ~PU'+YfL"1 TAYLOR IOSEPH s rku.t,tlBnC wx ~aNn~D) 86 xknnHU w Stwcx "jc"•"`~ Joh,.nOGANSON 1e+xese~+ q~„+ pax (612) 397-0000 Mrut-: n. raNRgTSkr sgNUNn 1 A1gRY)N ~LLLLSSn A C:R.~Yr 1ti~+.u'n.MAtiOwnlD .uNy eYm.l~cQ 1~ TODD tl. (JgNESS ~nkUfOYHBRw +o.-.u61 mowvuW t 10NES ID pracec. ..~ wi,.x,,,.u. iutOlnt M BgRNLTY JI:MkhDY L LECLExi K~mm~.jw,nttuop.cnm Reply ra DttcerLlaJ (b12) 337-0669 May 4, 1999 Minneapolis V1A FACSIMILE AND U.S. MAIL Corrine H. Thomson, Esq. );Cnnedy & Graven Chanered 2U0 South Sixth Street, Suite 47U Minneapolis, MN 55402 C7 Re: Academy of Holy Angels: Pond Lease Agreement pear Corrint:: D r~--`a ~ ~ ~ ~ MAY - 6 tggg This lettzr is to confirm ~n writing that the Academy is not able to ~Tant the City of Richfield a perpetual easement for use of tht: drainagC pond to be IocatCd on the Noah end of the Academy property since the praper[y where the pond is to be located is based to [he Academy by the Sisters of St. Joseph of Carondelet, St. Paul Province (thC "Sisters"}. The Academy can only lease the pond area to the City under the game term remaining on its Lease with the Sisters, which expires on July 31, 2026- Accordingly, the term of the Pond Lease betwCen the City and Academy nt:eds to expire on July 31, 2026. The Academy will not agree to an automatic renewal term of the Pond. LeasC in the event chat tht: Lease with the Sisters is extended for two reasons: (1) The Academy does not [kink that it i~ in the bCSt interests ot'the Academy to bind future Boards to an automatic renewal of the Pond Leasz since the present Board is unable to predict 2S years into the future what the use of this property will be at that time; and (2) the Academy has only received approval from tht; Sisters for the currently proposed Pond Leasz without an automatic renewal tCtm. However, tht: Academy will egret: that in the event that the Lease with the Si~tt;rs is extended its then current Boacd will negotiate in good faith with the City for a renewal of the Pond Leak. Should you have any further questions regarding this issue, please call me. Very truly yours, WINTHR`OP & WEiNS , P.A. By- `~ 1 Beth Gzrstein Ti 13GTloJI/MPI! 292634-1yF~lc No 7445-3 cc: Dr_ Jill Reilly Richard Solum, Esq.