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D-6. Watershed District to Construct a Spent Lime Treatment Facility �-�p CITY�_�:1 M�MORANDUM (��',!r;!�i; � �� ��� ���«I TO: Paul Oeh�ne, City Engineer/Public Worl<s Director;���� 7700 Market Boulevard � PO Box 147 FROM: Terry Jeffery, Wate��Resources Coordinatol• "�i'� Chanhassen,IVII�55,1/ � DATE: June 22, 2015 ��`�'�.4�;`� Administration Phone�952.227.1100 RE: Authorization for Wateished District to Construct a Spent Lime Fax:952.227.1110 'Treatroent Facility on City-owned Propei�ty and to Enter Into a Building Inspections Maintenance Agreement with the Watershed Distt•ict Phone 952.227.1180 Fax:952.227.1190 PROPOSED MO�'ION Engineerin� "Chanhassen City Council authorizes the Riley Pui-gatoiy Blufif Creek Watershed Phone�952.227.1160 Fax:952.2?/.1170 Disti•ict to construct a spent liine h�eatment facility in the Lake Susan Park Preserve and to enter into an Operations and Maintenance Ag�•eeme��t with the Riley Purgatoiy Finance Bluff Cr�eek Watei•shed District to inaintain the facility foi- its anticipated life." Phone:952.22%.1140 Fax�952.227.1110 City Council approval requires a simple majority vote of the City Coimcil pl•esent. Park&Recreation Phone:952.227.1120 In 2010, Lake Susa�l was included on the Clean Water Act, Section 303(d) list as being Fax:952.227.1110 impaired for excess nutrients. This (isting is based upon the North Central Hacdwood Forest (NCHF) ecoregion shallow lakes standards. Recreation Center 231��OU�fef BOU�BVdfd 7tti'�le l. /,r�ke.�ti.s�ut 1�1"ul�zr(l�rni;�?�.Sunrnt�,��t' Phone�952.227.1�100 Total Phosphorus Chlo�•ophyl-a Secchi Deph (m) Fax:952.227.1404 Existing conditions 75 �/L 37 r/L (0.7 �lanning� NCHF Shallow Lakes 60 i /L 20 /L 1.0 Natural Resources E g µ� � Phone�952227.1130 Standard , Fax:952.227.1110 In 20l 3, Chanhassen and the Riley Pl�rgatory Bluff Creek Watershed District updated the Public Works Use Attainability Assessment(UAA)for Lake Stisan. The UAA modeled the phosphorus 7901 Park Place budget for Lake Susan and calibrated it with the 15 years of data collected by the Phone:952.227.1300 Wateished District. Based upon this model, it was determined that the annual Fax:952.227.1310 phosphorus load should be reduced by 185 pounds. $e11101'C@I1tBf 1 eti�l<N' Lo�:td.�9lloc'�a�ic� 1';rr;rrr�crrr l��r i �r';��St;.�,;:t Ph0l1e:952.227.1125 Recu�n�neude<I L��d FaX:952�22�.1����� Soicrce_ Ezistina TP Load i Taraet TP Loadiu� Pti�ducYiou (Il�s:���t�1 (flx���enrl (1l3�:E•ear} 4-0 Website ��':�c��st,�c1 �_-� ���c, ;� t�t°a wwwcl.chanhassen.mnus t'p=u-eari�L,�.�: �s ic, t� �°-� ?tnzo3�I.�re ^1 �1 c� d)��, I�iternal Ltract 281 1�4 1�7 4�°o TOT_�Z. ?�_' " 13� '�Ua E_ii�titie lo:d is tiie:�,esa2e f��r tl;��;cu;:_�!�-�-��L���,ni1_Uf,iS-:�}1'. Chanhassen is a Community for Life-Providing for Today and Planning for Tomorrow Mr.Paul Oehme June 22,2015 Page 2 The UAA identified four potential projects that could be implemented to address the external load to Lake Susan with a relatively short horizon. These projects are improvements to the pond south of Target and north of TH 5, improvements to the pond northeast of Lake Susan in Lake Susan Park, improvements to the pond just south of Lake Drive West and west of Powers Boulevard and the construction of an iron- filing filter within the wetland in Lake Susan Park Preserve. This last project is the topic of this memorandum. The Riley Purgatory Bluff Creek Watershed District has allocated funds to make the improvements within Lake Susan Park Preserve in 2015. Barr Engineering,the District Engineer,has worked with the City on the design of the system to assure that the finished project has the greatest removal efficiency in terms of dollars spent per pound removed,has the least impact on tree removal and wetland and is in keeping with the intended use of the preserve. To meet this objective,we evaluated a woodchip bioreactor in two locations, an iron enhanced sand filter at two locations and a spent lime treatment system. The spent lime was second only to the iron-enhanced filtration system as shown in the UAA but at only a quarter of the cost and a fraction of the footprint it was determined that the spent lime system was the best alternative. Tnhle 3.Sinnma���of Lake S�tsrn�projects fi�om Barr 6ngineei�ing i•eport prepm�ecf for RPBCWD Estimated Wetland Upland Enqineer's Annual Cost Conceptual Design Annual TP �mpacts Impacts Opinion oi per Pound TP Redudion Probable Cost Removed (Ihs/yr)' (acre) (acre) (5) ($/ibs TP/yr)z Ccr<ep:c;'p-;inr t".c.rdrn p B c,rea._or �2 .:p1 0 2 :ili,�3.')- ,�,_50-$_4V +,VJest Location) 4,1�r7.�0� t_onceptuai Desigr._ \Noodchip Biorea�to� 3z ;p i �, $�07,000- 8150-8'��� (East Lacation) 5187,000 (Cor.cepival Desigr? _,� $:94.00'J- a, Iron-Er=nanced F�It+a:icn " .��1 �"�'` 53'?9.Q0� g���� ����`� Conceptual Design 4 45 .:��^1 �_ 5360,000- $1�� g`:V Spent-Lime Treatment System 5280,d00 CcncepYuai Desigr;5 $592,OOG- Iron-Enhanced FRra.icn 53 -0.�' �-0.1� cl,�?s.00: gaoo-E6�a (2013 UAA Update Locatior,> 1- E:�timated amua'tetai pM:p�or�:.(Ep)reduct�on is the removal with the BMP,thE 6h'G perfemiarrz v;�;e�daluattd o•rer a 30- }•ear per[od!2003-_'D=?).l�dditi.nal removal;in the up�tream wttland through settling or inf ltrat on ara n�t induded. 1- 6a:ed cn a:Oryear pericd.]n:�udes r,timated co;t fer permittinq,enqineenng,and con;tructfcn; and estimated an�ual eper�tion and maintenance cost:of S1C�Q0.'year. �— AFIF)i'O-.f1i1`3CP'Jal�c:L13LE��I C^2';d�I3L``c i^fOflt'dfiClt.IT11Y::I7 the 52!e{fECf Ct�I1C2PCU31 CIe.IG!7,3'JrEt�dl1�dBI9B3CIC�-J 1'2a�'�'e0 durinq th,-�e t d-c;`a'p!^-:e t�.det�rn-�ir�e tP.e i��ptctec area NOTE: The engineer's opinion of cost as of the 90%submittal plans was$137,500. The Watershed District will pay for the cost of constructing the facility and the City will then assume ownership of the facility and will be responsible for the maintenance of the spent lime system moving forward. Additional routine maintenance will consist of getting into the system annually to break up any crusting ar caking that forms on the surface and occasional replacement of the spent lime. Otherwise the maintenance will be the same as it currently is for the existing structure and pipe. The City will receive all phosphorus reduction credit to apply toward any Clean Water Act Total Maximum Daily Load implementation plan waste allocation load. The waste load allocation will fall primarily to the City as the largest entity regulated under the NPDES MS4 permit. This practice will G:\I?NG\Te�ry\Watershed Distriets\RPBCWD\Projeets\Lake Susan Bioreacror\Meetings\20150622_Ciry Couneil_Memo authorizing spent Iime projecLdocx Mr.Paul Oehme June 22,2015 Page 3 meet approximately 45 pounds of the 58 pounds(or 77%) of annual reduction needed within the watershed. It is rare when one practice can achieve such significant reductions. Upon final permit approval from the DNR and approval of the City,the Watershed District will finalize plans and solicit bids. The City and Watershed District will enter into an agreement stipulating responsibilities and the Watershed District will solicit bids for construction. The agreement is attached to this memorandum. There will be some latitude given to the contractar regarding when the work is to be performed although it is anticipated that it wi11 be late fall or early winter and the schedule must be communicated clearly to the City for approval. The contractor is requested to keep the trail open except when to do so would prove a risk to public safety. The contractor must communicate any closings with the City and endeavar to minimize these closings to the greatest practicable extent. The contractor will be responsible for repairing the trail if it is shown that the work resulted in damage to the trail. A neighborhood meeting will be held in October. This information was presented to the Parks Commission at their Apri128t1'meeting. They recommended that Council approve the project. Grass pavers will be used to provide access to the facility for maintenance while allowing for establishment of vegetation consistent with the area. A landscaping plan is being prepared that will provide screening of the system and a cover has been designed to make the facility safe while allowing access for maintenance. The goal is to have a finished project that blends with the surroundings that improves the water quality of Lake Susan,provides benefit to the riparian land owners, creates a better recreational experience for the users of Lake Susan and ultimately results in Lake Susan being removed from the 303D list of impaired waters. Attachments: Cooperative Agreement Plan Sheets Schedule G:�ENG\Te�ry\Watershed Districts\RPBCWD�ProjectsVake Susao Bioreactor\Meetings�20150622_City Council_Memo authorizing spent lime projecLdocx I COOPERATIVE AGREEMENT Between the Riley-Purgatory-Bluff Creek Watershed District and the City of Chanhassen Lake Susan Spent-Lime Water Quality Improvement Project This cooperative agreement is made by and between the Riley-Purgatory-Bluff Creek Watershed District (hereinafter referred to as RPBCWD), a watershed district created pursuant to Minnesota Statutes chapters 103B and 103D, and the City of Chanhassen (hereinafter referred to as Chanhassen), a governmental subdivision and body corporate and politic of the State of Minnesota. Recitals and Statement of Purpose WHEREAS RPBCWD has an approved Water Resources Management Plan pursuant to Minnesota Statutes chapter 103B, and the plan identifies excessive nutrient loading as an ongoing harm to water quality in Lake Susan; WHEREAS in 2010 the Minnesota Pollution Control Agency added Lake Susan to the list of state waters that are not meeting their designated-use classification because of excessive nutrients in the lake; WHEREAS in 2013 the RPBCWD updated the use attainability analysis it had prepared for Lake Susan and Rice Marsh Lake in 1999, and the update focused on assessing the water quality in Lake Susan based on current physical, chemical and biological data, improving the understanding of concerns about water quality in the lake, and identifying best management practices to improve and protect the lake's water quality and move toward removal of Lake Susan from the state list of impaired waters; WHEREAS the RPBCWD engineer completed a feasibility report in July 2014 that summarizes proposed actions within a subwatershed to Lake Susan designated LS-2.12 to improve water quality in the lake, and the report—in light of the engineering assessment, analysis of potential site impacts and estimate of cost per pound of phosphorus removed— recommends a spent-lime treatment system as the most feasible and cost-effective approach to reducing nutrient-loading to Lake Susan to help meet RPBCWD's goals for the lake (hereinafter referred to as the Project); WHEREAS the Project would provide an estimated 45 pounds of total phosphorus reduction per year, at an estimated annual cost of$140-$230 per pound of phosphorus removed; and WHEREAS Chanhassen shares RPBCWD's goal of improving management of stormwater runoff to Lake Susan and wishes to substantially participate in the construction and implementation of the Project, and the Project can be constructed entirely on property owned by Chanhassen within the Lake Susan Hills West Ninth Addition and Chanhassen Hills Third Addition, as shown in Exhibit A, attached to and incorporated into this agreement (hereinafter referred to as the Property); Riley-Purgatory-Bluff Creek Watershed District-Chanhassen 1 Cooperative Agreement—Lake Susan Spent Lime Water Quality Improvement Project WHEREAS Chanhassen operates its stormwater management system under the state Municipal Separate Storm Sewer System (MS4) general permit, and construction and maintenance of the Project will accrue to the benefit of Chanhassen's fulfillment of its MS4 permit obligations; WHEREAS RPBCWD amended the capital improvements program in its watershed plan to include a spent-lime treatment system for Lake Susan and on September 22, 2014, the RPBCWD Board of Managers ordered the Project in accordance with Minnesota Statutes section 103B.251; WHEREAS Chanhassen and RPBCWD acknowledge that their ability to achieve Project ��� objectives depends on each party satisfactorily and promptly performing individual obligations and working cooperatively with the other party; and I WHEREAS Minnesota Statutes section 471.59 authorizes Chanhassen and RPBCWD to enter I this cooperative agreement. AGREEMENT NOW, THEREFORE Chanhassen and RPBCWD enter into this agreement to document their understanding as to the scope of the Project, affirm their commitments as to the responsibilities of and tasks to be undertaken by each party, establish procedures for performing these tasks and carrying out these responsibilities, and facilitate communication and cooperation to successfully complete the Project. 1 Or�anization and Relationship of the Parties 1.1 The Riley-Purgatory-Bluff Creek Watershed District administrator and the Chanhassen water resources coordinator will serve as project leads and principal contacts for their respective organizations for the Project, charged to conduct the day-to-day activities necessary to ensure that the Project is completed in accordance with the terms of this agreement. 1.2 The project leads will coordinate and communicate informally and formally to timely address any issues of concern to ensure the successful completion of the Project, including but not limited to communications with property owners and users of the existing trail on the Property near the Project location, as shown in Exhibit A (hereinafter referred to as the Trail). 2 Proiect 2.1 The Project is further defined and specified for purposes of this cooperative agreement and the parties' implementation thereof as entailing excavation, grading and filling; alteration of topography, vegetation, hydrology and stormwater treatment systems; construction of a concrete spent-lime treatment chamber with grated cover; installation of a spent-lime system with underdrain system and inline backflow preventer, along with associated piping, valves and manholes; placement of riprap and modification of the existing weir structure at the Property; Riley-Purgatory-Bluff Creek Watershed District-Chanhassen 2 Cooperative Agreement—Lake Susan Spent Lime Water Quality Improvement Project reestablishment of vegetation; disturbance of and, at the completion of the Project, restoration of the Trail. The Project will also include, after completion of construction, assessment of the , effectiveness of the Project and development of specific written schedules, procedures and protocols for routine and major maintenance (hereinafter referred to as the Maintenance Plan). 2.2 For purposes of the Project as specified in paragraph 2.1, Chanhassen hereby: I', i. Grants to RPBCWD, its contractors, agents and assigns an easement to access and use II the access, construction and maintenance areas of the Property, as delineated on Exhibit A, for purposes of RPBCWD's successful completion of its obligations in this agreement. ii. Chanhassen's authorization hereunder is nonexclusive, except that RPBCWD, on 24 hours' notice to Chanhassen, may temporarily restrict or preclude public access to the Trail in the access, construction and maintenance areas to ensure safety while construction or maintenance activities are under way. Access to the Trail will be restricted as briefly and infrequently as reasonably possible, and will be imposed only as necessary for Project access, construction, safety and maintenance purposes. RPBCWD will respond within one business day to any communication from Chanhassen regarding Trail closure. iii. On completion of construction of the Project, Chanhassen will retain ownership of the improved Property and all installed and constructed elements of the spent-lime treatment system as described in paragraph 2.1 and otherwise herein. iv. Chanhassen will forbear from any activity that interferes with the RPBCWD's ability to exercise its rights or meet its obligations under this agreement, including but not limited to Chanhassen's transfer of ownership of the Property. Chanhassen will facilitate RPBCWD's reasonable exercise of its rights under this agreement with regard to access to and use of the Property. Chanhassen will not take any action on the Property that could reasonably be expected to diminish the effectiveness or function of the Project for the purposes intended, and after notice of completion of construction of the Project from RPBCWD, Chanhassen will continue to maintain the Trail in a manner that avoids altering flow through the conduits constructed under the Trail as part of the Project. 2.3 RPBCWD will design and prepare all necessary construction documents (plans, drawings, technical specifications) for the Project, and submit the 90 percent-complete plans and specifications to Chanhassen for approval. Chanhassen will have 30 days to approve the plans and specifications. Failure to timely act will constitute approval. Chanhassen's authority to approve plans and specifications will not be unreasonably exercised. RPBCWD will ensure that plans and specifications and the Project, when constructed, are compatible with the Property and this agreement. 2.4 As between the parties, RPBCWD will obtain all necessary permits, licenses and approvals on behalf of itself and Chanhassen, including approval of a wetland replacement plan Riley-Purgatory-Bluff Creek Watershed District-Chanhassen 3 Cooperative Agreement—Lake Susan Spent Lime Water Qualiry Improvement Project if necessary, and will ensure that the Project is completed in accordance with applicable law and regulatory requirements. Chanhassen, as owner of the Property, will cooperate with RPBCWD's and its contractor's efforts to obtain permits and approvals needed for the Project. Chanhassen, in its regulatory capacity, will facilitate the proper and efficient processing of any permits and approvals needed for the Project, including but not limited to approvals under the Wetland Conservation Act. 2.5 RPBCWD will implement the Project as follows: i. RPBCWD will prepare or have prepared on its behalf construction documents and will ensure that such documents provide for the restoration of the Property in accordance with this agreement; ii. RPBCWD will contract for the construction of the Project in accordance with state procurement law. RPBCWD will require that the contractor for the Project name Chanhassen as an additional insured with primary and noncontributory coverage for general liability and provide a certificate showing same prior to construction; ' iii. RPBCWD or the RPBCWD engineer on RPBCWD's behalf will oversee the ' construction of the Project. RPBCWD may adjust the plans and specifications for the 'I Project during construction, as long as the revised plans do not require RPBCWD to j exceed the scope of the rights granted under this agreement; iv. RPBCWD will submit material changes to Project plans and specifications to Chanhassen for approval, such approval not to be unreasonably withheld. Chanhassen's failure to timely act will constitute approval; v. On completion of construction of the Project, RPBCWD will restore the Property to a safe and functional condition, consistent with the ongoing use of the Trail for public recreational purposes. In addition, on completion of construction of the Project, RPBCWD will assist Chanhassen's operation and maintenance of the Project. 2.6 Until completion of construction of the Project, if RPBCWD, in its judgment, should decide that the Project is infeasible, RPBCWD, at its option, may declare the agreement rescinded and annulled. If RPBCWD so declares, all obligations herein, performed or not, will be voided, except that RPBCWD will return the Property materially to its prior condition or to a condition agreed to by Chanhassen and RPBCWD. 3 Cost- and Credit-Sharing 3.1 RPBCWD will be responsible for all costs of design and construction of the Project. RPBCWD will be responsible for the costs and fees associated with complying with regulatory requirements applicable to the Project, including the costs of any wetland replacement required by law, except that Chanhassen will assess no fee to RPBCWD for Chanhassen permits required for the Project, if any. Chanhassen will be responsible for costs of routine operation and maintenance of the Project in accordance with the Maintenance Plan for the expected useful life of the Project as specified in the Maintenance Plan, except that RPBCWD will provide assistance with the maintenance of the Project as will be described in the Maintenance P1an at its own cost. Riley-Purgatory-Bluff Creek Watershed District-Chanhassen 4 Cooperative Agreement—Lake Susan Spent Lime Water Quality Improvement Project Each party will bear its adininistrative and incidental costs of fulfilling its responsibilities and obligations under this agreement. 3.2 All stormwater-management or nutrient-reduction capacity created by the Project, if any, may be utilized by Chanhassen in accounting for compliance with its MS4 permit or other regulatory obligations. Chanhassen will detennine, at its cost, available credit from the Project. RPBCWD makes no representation or warranty as to credit that will be available from or results that will be achieved by the Project. 4 Speci�c additional duties—RPBCWD 4.1 RPBCWD will provide as-built construction drawings of the Project to Chanhassen within 90 days of certification of the Project as substantially complete for the intended purposes. 4.2 RPBCWD will contract with the RPBCWD engineer for the development of the Maintenance Plan. The contract for the Maintenance Plan will require the RPBCWD engineer to provide the Maintenance Plan for approval by Chanhassen and RPBCWD within one year of certification by a qualified engineer of the as-built construction drawings of the Project, such approval not to be unreasonably withheld. 4.3 RPBCWD makes no warranty to Chanhassen regarding the RPBCWD engineer's or another third party's performance in design, construction or construction management for the Project. 5 Specific additional duties—Chanhassen 5.1 Chanhassen owns or will timely acquire all land-use rights necessary for the Project, and will own all Project elements at completion of construction. 5.2 Chanhassen will approve or reject the Maintenance Plan within 45 days of receipt from the RPBCWD engineer, such approval not to be unreasonably withheld. Failure by Chanhassen to timely act on its rights and obligations under this paragraph will constitute approval of the Maintenance Plan. If Chanhassen disapproves the Maintenance Plan, this agreement is terminated and all maintenance necessary to assure that the Project will continue to effectively function as designed will become the sole responsibility of Chanhassen. On approval of the Maintenance Plan, Chanhassen will perform all routine maintenance and monitoring of the Project, along with reporting as required by the Maintenance Plan. 6 General Terms E).1 INDEPENDENT RELATIONSHIP; LIABILITY. i. This agreement does not create a joint powers board or organization within the meaning of Minnesota Statutes section 471.59, and neither party agrees to be responsible for the acts or omissions of the other pursuant to subdivision 1(a) of the statute. Only contractual remedies are available for the failure of a party to fulfill the terms of this agreement. Riley-Purgatory-Bluff Creek Watershed District-Chanhassen 5 I Cooperative Agreement—Lake Susan Spent Lime Water Quality Improvement Project ii. Chanhassen and RPBCWD enter this agreement solely for the purposes of improving water quality in Lake Susan. Accordingly, with respect to any and all activity undertaken pursuant to this agreement, Chanhassen and RPBCWD will each hold hannless, defend and indemnify the other, its officers, employees and agents for all claims, damages, liabilities, losses and expenses asserted against the other party at any time by any third party, including any governmental body. Notwithstanding the foregoing or any other provision of this agreement, Chanhassen's and RPBCWD's obligations under this paragraph will survive the tennination of the agreement. iii. This agreement creates no right in and waives no immunity, defense or liability limitation with respect to any third party. iv. Notwithstanding the foregoing, RPBCWD will not be deemed to have acquired by entry into or performance under this agreement, any form of interest or ownership in the Property. RPBCWD will not by entry into or performance under this agreement be deemed to have exercised any form of control over the use, operation or management of any portion of the Property or adjacent property so as to render RPBCWD a potentially responsible party for any contamination under state and/or federal law. 6.2 PUBLICITY AND ENDORSEMENT. Any publicity regarding the Project must identify Chanhassen and RPBCWD as the sponsoring entities. For purposes of this provision, publicity includes notices, informational pamphlets, press releases, research, reports, signs, and similar public notices prepared by or for Chanhassen or RPBCWD individually or jointly with others, or any subcontractors, with respect to the Project. RPBCWD and Chanhassen will collaborate on the development of educational and informational signage pertinent to the Project, and each party, at its cost, may develop, produce and, after approval of the other party, distribute educational, outreach and publicity materials related to the Project. 6.3 DATA MANAGEMENT. All designs, written materials, technical data, research or any other work-in-progress will be shared between the parties to this agreement on request, except as prohibited by law. As soon as is practicable, the party preparing plans, specifications, contractual documents, materials for public communication or education will provide them to the other party for recordkeeping and other necessary purposes. 6.4 DATA P�cT�cEs. All data created, collected, received, maintained or disseminated for any purpose in the course of this agreement is governed by the Minnesota Government Data Practices Act, Minnesota Statutes chapter 13, and any state rules adopted to implement the act, as well as federal regulations on data privacy 6.5 ENTIRE AGREEMENT. This agreement, as it may be amended in writing, contains the complete and entire agreement between the parties relating to the subject matter hereof, and supersedes all prior negotiations, agreements, representations and understandings, if any, between the parties respecting such matters. The recitals stated at the outset are incorporated into and made a part of the agreement. 6.6 WAIVExs. The waiver by Chanhassen or RPBCWD of any breach or failure to comply with any provision of this agreement by the other party will not be construed as nor will it Riley-Purgatory-Bluff Creek Watershed District-Chanhassen 6 Cooperative Agreement—Lake Susan Spent Lime Water Quality Improvement Project , constitute a continuing waiver of such provision or a waiver of any other breach of or failure to comply with any other provision of this agreement. 6.7 NOTICEs. Any notice, demand or communication under this agreement by either party to the other will be deemed to be sufficiently given or delivered if it is dispatched by registered or certified mail, postage prepaid to: Chanhassen RPBCWD Terry Jeffery, water r•esources coordinator Claire Bleser, PhD, administrator 7700 Market Blvd 14500 Martin Dr, Suite 1500 Chanhassen, MN 55317 Eden Prairie, MN 55344 952-227-1168 952-607-6512 6.9 TERM; TExMrtvATloN. This agreement is effective on execution by both parties and will terminate three years from the date of execution of this agreement or on the written agreement of both parties. IN WITNESS WHEREOF, the parties have executed this agreement. RILEY-PURGATORY-BLUFF CREEK WATERSHED DISTRICT a watershed district and political subdivision of the State of Minnesota By Date: Perry Forster President APPROVED AS TO FORM AND EXECUTION By RPBCWD counsel CITY OF CHANHASSEN, a statutory city and political subdivision of the State of Minnesota By Date: Denny Laufenburger Mayor By Date: Todd Gerhardt City Manager Riley-Purgatory-Bluff Creek Watershed District-Chanhassen 7 Cooperative Agreement—Lake Susan Spent Lime Water Quality Improvement Project Exhibit A Site Plan � I ------- -- ----- — �o P �m ti - � — -- - ------- -- -- ----- o V z o� y� H � �F ��Iw L' O W � W �� aNa o� � W F— � J ti� u C9 z n J � F- J VI H �V gNw Q � � � 3 Q � �o i � �J � � a U � W U � w �� ~ U ��Z �' 2 � �i (a~n Z W F � L�O � � �" � g � � � o > � o � � J �� � �io c � � Z = H J U Q E� �' a �3 O d W o� U� � � i i i � \ w � N � � � �W x Q W � G F i q tt �Z �Z �Z � � rc � O� �! 3� Wp= Z tS� a � § � s �w ay �w �o — - -- - � C[�a w� �5 �� �a N F q i� (n O �F S J 2 � Z t 2 �3 � -� (n W VI y F � � � � � -� Z a �'i u � g a y o� `� ° k vQi g — --- � a h b � � ks � .� � _ mp] G� : �� C �� � �5g (n 6N'Y �Y - �o QQ 4 � � �� w �b � u ° o _ iF w Q z o� y 4� o �� Q � �,�x��$ "_�� -,. ,�,, �o� � �+ �6 o c� ` ..$p F �n°w3`Sno � m4 4 ,8�'� =�rv Om � q qY � �%m:��$ �m�a�a ._ 8�g �n ---- — — F-- } U �W� Q W� __ --_ ��� —__ . . 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