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HomeMy WebLinkAbout2009-12-16 PACKET 04.L.REQUEST OF CITY COUNCIL ACTION COUNCIL AGENDA MEETING ITEM # DATE 12/16/09 PREPARED BY: Engineering Jennifer Levitt ORIGINATING DEPARTMENT STAFF AUTHOR COUNCIL ACTION REQUEST: Receive Information: BWSR Clean Water Fund Grant Submittals. STAFF RECOMMENDATION: Receive Information: BWSR Clean Water Fund Grant Submittals. ADVISORY COMMISSION ACTION: DATE F PLANNING F PUBLIC SAFETY [:1 PUBLIC WORKS ❑ PARKS AND RECREATION [:1 HUMAN SERVICES/RIGHTS ❑ ECONOMIC DEV. AUTHORITY El REVIEWED APPROVED DENIED ❑ F F ❑ F F ❑ ❑ ❑ ❑ ❑ ❑ ❑ F ❑ ❑ ❑ ❑ ❑ F ❑ SUPPORTING DOCUMENTS: Z MEMO/LETTER: Jennifer Levitt, December 10, 2009. ❑ RESOLUTION: F ORDINANCE: F ENGINEERING RECOMMENDATION: ❑ LEGAL RECOMMENDATION: Z OTHER: Project Narrative Form FY1 0-1 for Project #1 Project #3: SPP-A10. ADMINISTRATORS COMMENTS: C-P6, Project #2: ED-P5, and or City Administrator Date COUNCIL ACTION TAKEN: []APPROVED ❑ DENIED OTHER CITY OF COTTAGE GROVE MINNESOTA To: Honorable Mayor and City Council Ryan Schroeder, City Administrator From: Jennifer M. Levitt, P.E., City Engineer Date: December 10, 2009 Re: Receive Information: BWSR Clean Water Fund Grant Submittals Background /Discussion The Clean Water Fund was established to implement part of Article XI, Section 15, of the Minnesota Constitution, with the purpose of protection, enhancing, and restoring water quality in lakes, rivers, and streams in addition to protecting groundwater and drinking water sources from degradation. The primary purpose of activities funded with grants associated with the Clean Water Fund is the control or prevention of chemical or nutrient runoff, soil erosion, sedimentation, runoff volume or materials that affect human or aquatic system health. Eligible projects can consist of structural practices, technical assistance or non - structural measures and best management practices. Local units of government are eligible to receive grant funds if they are working under an approved watershed management plan. An eligible activity must comply with the following three requirements: 1) all structural practices must be designed and maintained for a minimum effective life of ten years, 2) operation and maintenance for the life of the practice is included with the design standards, 3) an inspection schedule and procedure shall be included as a component of maintaining the effectiveness of the practice. The South Washington Watershed District (SWWD) submitted three projects to BWSR for the FY 2010 Clean Water Grant Fund on behalf of the City, because cities were not eligible to submit based on the classification of projects, but watershed districts were eligible. Project #1: C -P6 located south of Pine Tree Valley Park in the valley between Irvin Avenue and Irish Avenue. The total project cost is $423,800 (Grant request of $339,040 with a match of $84,760) The proposed project includes the excavation and construction of 3 water quality cells at all three of the discharges into Pond C -P6 and an infiltration Swale running the length of the ravine. The first cell at the far north end of the existing Pond C -P6 will be sized to accommodate a roughly 200 acre watershed. The cell will be designed to dissipate the energy of discharge from the 48 -inch inlet currently causing erosion and a skimmer outlet will be provided. Discharge from the northern pond will begin a meandering infiltration Swale, through the bottom of the existing ravine. The Swale will include grade control structures to slow flow velocities and promote infiltration. The Swale will be planted with native vegetation, including shrubs, to protect the channel from erosion. A second wet pond cell will be sized to accommodate a roughly 3 acre watershed. The proposed feature acts as a pre- treatment sediment trap, prior to overflowing into the adjacent infiltration swale. The final cell is proposed at the downstream end of an approximately 80 acre watershed. Due to the steep slopes in this area, the size of this feature is limited. The proposed feature will include a skimmer outlet. Project #2: ED -P5 located in the open ravine space south of Kingston Park and north of 80 Street with a total project cost of $800,000 (Grant request of $640,000 with a match of $160,000) The proposed ED -P5 Pond Improvements Project includes the excavation of two water quality features within the vicinity of the existing ED -P5. These two features will intercept certain inlets into pond ED -P5 for treatment prior to discharging back into ED -P5. The north feature will include a two -cell design providing water quality treatment for a 90 acre drainage area. The first cell will be a wet pond providing pre- treatment for storm water runoff discharging into the second cell, an infiltration basin. The wet pond will have an approximate surface area of 0.8 acres and a wet volume of approximately 3.3 acre -feet. The infiltration basin will have an approximate surface area of 0.5 acres. Sized to infiltrate 1 -inch of runoff from the existing impervious area (approximately 15.9 acres) draining to the pond, the infiltration basin will have a volume of approximately 1.3 acre feet and assuming a reasonable existing infiltration rate (based on HSG B soils) the basin will drain down in less than 48 hours. The infiltration basin will be restored with native vegetation to provide a deep root structure to maximize infiltration rates. This native vegetation will have the ability to withstand prolonged inundation times. A skimmer structure will also be provided. Project #3: SPP -A10 located at Wheels of Travel with a total project cost of $807,200 (Grant request of $645,760 with a match of $161,440) Drainage from the northerly agricultural areas drains south via a ravine, crossing under 70th Street, into drainage area SPP -A10. Flows then drain overland via a ravine across the Wheels of Travel Incorporated property (PID 07- 027 -21 -22 -0001) prior to discharging to the TH 61 Right -Of -Way (ROW). This project proposes to purchase the Wheels of Travel Incorporated property, remove the existing buildings, and excavate a regional storm water pond on site. The proposed design will divert the low flows from the existing ravine into a two cell pond to provide water quality treatment. The first cell of the proposed two cell pond will be a wet pond having an approximate surface area of 0.4 acres and a wet volume of approximately 1.5 acre -feet. This cell will provide pre- treatment for storm water runoff prior to discharging into the second cell, an infiltration basin that will be sized to maximize surface area within the parcel. Both cells will be constructed following guidance provided in the MN Stormwater Manual. Excessive flows will bypass the pond and continue toward the TH 61 ROW. This project is a collaborative effort between the City of Cottage Grove and the South Washington Watershed District (SWWD). Water quality pond improvements in the vicinity of SPP -A10 are specifically identified as a future implementation item in Cottage Grove's 2 approved Local Surface Water Management Plan. Further, this project will adress inter - community flow issues between Cottage Grove and St. Paul Park as identified in SWWD's watershed management plan and bring the watershed into compliance with SWWD's total phosphorus loading standard of 0.22 Ibs /acre /year that is applicable to all watersheds' tributary to the Mississippi River. FY 2010 Clean Water Fund Water Quality Comprehensive Project Narrative The entire narrative portion of the application should be no more than 3 pages in length and should include the following topics as section headings Title: (10 words or less): C -P6 Pond Improvments Project Abstract (30 words or less): The proposed project will provide protection of wetlands and the Mississippi River by improving an existing stormwater basin to increase infiltration and reduce stormwater runoff and associated nutrients and sediment. Overall Project Narrative (500 words or less): This section of the narrative should describe the level of project partners' coordination, cooperation and community support for the project, projects that have proven to be successful in similar circumstances or prior successful projects and the level of project partners' project management expertise and experience and any habitat benefits that may result from this project. Pond C -P6 is located in the north central part of Cottage Grove and currently provides stormwater rate control for a 285 acre watershed consisting primarily of residential land uses. The existing pond C -P6 reduces discharge rates to downstream basins, but does not provide water quality treatment. The existing basin is within a ravine, surrounded on three sides by steep slopes, with an earthen embankment at the downstream end forming the ponding area. Pond C- P6 discharges via storm sewer to the south through a series of City ponds and DNR Public Waters wetlands, eventually reaching the Mississippi River. The proposed project includes the excavation and construction of 3 water quality cells at all three of the discharges into Pond C -P6 and an infiltration Swale running the length of the ravine. The first cell at the far north end of the existing Pond C -P6 will be sized to accommodate a roughly 200 acre watershed. The cell will be designed to dissipate the energy of discharge from the 48 -inch inlet currently causing erosion and a skimmer outlet will be provided. Discharge from the northern pond will begin a meandering infiltration Swale, through the bottom of the existing ravine. The Swale will include grade control structures to slow flow velocities and promote infiltration. The Swale will be planted with native vegetation, including shrubs, to protect the channel from erosion. Form FY10 -1: Project Narrative A second wet pond cell will be sized to accommodate a roughly 3 acre watershed. The proposed feature acts as a pre- treatment sediment trap, prior to overflowing into the adjacent infiltration Swale. The final cell is proposed at the downstream end of an approximately 80 acre watershed. Due to the steep slopes in this area, the size of this feature is limited. The proposed feature will include a skimmer outlet. The City of Cottage Grove and the South Washington Watershed District (SWWD) are committed to this project. Proposed improvements are specifically identified in Cottage Grove's approved Local Surface Water Management Plan. Further, SWWD's Watershed Management Plan sets of a goal of maintaining, or where practical improving, the water quality of wetlands and water bodies within the District. The proposed improvements will help SWWD reach its goal. Cottage Grove and SWWD have a long history of working together to manage Water resources in the District. Recently, the City and District partnered to complete the ED -P6 water quality improvements project that corrected an ongoing erosion issue, removed deposited material from a downstream wetland, and excavated a pretreatment cell upstream of this existing wetland. The construction costs for this project were paid for by the South Washington Watershed District, with the City performing the engineering and administration for the project. A similar arangement will be used for this proposed project utilizing CWF grant funding. Cottage Grove has years of project management experience on projects involving water resource management. In addition to the ED -P6 project, the City has successfully completed a $1.4 million pond improvement/expansion project in Hamlet Park. Explain how this project will mitigate or prevent current or future water quality impairments. The City's existing PonclNET model was used to generate pollutant load reduction estimates associated with the proposed water quality features. The PondNET model was originally developed for the City's Nondegradation Review and includes a high level of detail regarding the land use inputs and individually models water quality treatment features. Once the project moves forward, additional hydraulic and water quality modeling will be necessary to design the dimensions of the ponds and infiltration swale and better estimate pollutant load reductions of the improvements. The current model shows annual reductions of 15 acre -ft (10 %) of runoff, 76 Ibs (43 %) of total phosphorus, and 40,695 Ibs (67 %) of total suspended solids. Water quality improvements as a result of this project will help prevent degradation of downgradient wetlands and further impairment of the Mississippi River. affected watershed and keep water on d Form FY10 -1: Project Narrative 2 The South Washington Watershed District is generally characterized by soils with high infiltration capacity. Thus, BMPs that increase contact time between stormwater runoff and the land are typically highly effective. The existing basin provides stormwater runoff rate control for a 285 acre watershed. The proposed improvements will provide stormwater runoff volume control, increased infiltration, and water quality treatment. Ultimately, by increasing contact time to keep water on the land, the proposed improvements will result in an annual reduction of 15 acre -ft of stormwater runoff mostly due to increased infiltration. Identify long -term inspections and maintenance needs of the project and how these activities will be accomplished. Inspection and maintenance of the C -P6 Pond improvements is the responsibility of Cottage Grove, being part of the City's overall storm water system maintenance program. This maintenance program is identified in the City's Storm Water Pollution Prevention Plan (SWPPP), which is part of Cottage Grove's Municipal Separate Storm Sewer System (MS4) permit responsibility. The City funds this program through their Storm Water Utility. Regular pond inspection and maintenance occurs a minimum of once every 5- years, or more frequently as needed. Describe the coordination of this project with local groundwater plans. The project area is located within a drinking water supply management area (DWSMA) identified in the City of Cottage Grove Wellhead Protection Plan (WPP), Part 2 (2006). Infiltration improvements completed as part of this project will be designed in accordance with guidance provided in the WPP and the 2003 Washington County Groundwater Plan. Please indicate any permits this project will require. Identify the current stage of the permitting process. This project will be carried out under the NPDES general construction permit and will require SWWD review. City of Cottage Grove staff will be responsible for all necessary permit and review processes. Permitting and review processes will be initiated when funding is secured. Form FY10 -1: Project Narrative 3 If the project participants choose to consider the conservation value of land where Clean Water Fund conservation practices will be installed as local match, please describe the valuation and application methods. NA If using Clean Water Funds for incentives to encourage landowners to install structural practices or to adopt land management practices that improve or protect water quality, please describe the LGU's adopted policy for evaluating the necessity, method of calculation, and effectiveness of the proposed incentives. NA Form FY10 -1: Project Narrative 4 2010 Comprehensive Competitive Grant Application Page 1 of 1 a ) ƒ ƒ ( z � / \ R I [ \ / G CM m Q – a t . \ _ } \ J \ a k f f k / k « ) D \ U- \ / G 5 7 - ] & 5 co ƒ k a / C5 Q | r k C / k ( » 3\ \) / \E m/ cu m m/ #: , , }} } } { U- } } } :\ \\ k /_ % 3 0a— 00- ± , Af / Af $o $ - \ ~ m ca a t . \ _ } \ J \ a k f f k / k « ) D \ U- \ / G 5 7 - ] & 5 co ƒ k a / C5 Q | r k C / k ( » 3\ \) \a \E m/ \� m m/ \} \\ \\ \ \\ % 0a— 00- ± , Af / Af $o $ - \ ® // 0 } &/ cl a * A 3 - o� o§ :C) a o�0 0 \ 42 «;2) 9474 $ m, mo:mebA [u US m m ca a t . \ _ } \ J \ a k f f k / k « ) D \ U- \ / G 5 7 - ] & 5 $ ( 2 § 3] ƒ k a / C5 Q | r k C / k ( » 3\ CD m m m/ m m m/ m ca 2010 Comprehensive Competitive Grant Application Has your organization received Clean Water Legacy Grant funding in the past 3 years (yes /no)? 1A: If so, for how much funding? 1 B: How much has been encumbered or authorized through local Board action? 1C: How much funding was spent? 1 D: If funding was returned to the State of Minnesota from a CWL Grant, how much was returned? 2. Has your organization undergone a financial audit from a third party within the last 2 years? Yes Page 1 of 1 s s� �o SF 4� �x` E° S� f e= e + E P `y 8 t R a V 6 a Q L a z a n E 0 U m C a L a n E 0 U 0 0 n" 0 a ° n a 'c v a E U 6 E 0 v a c 0 a n a " >_ v .. n a � E m U c a m > m u� c v E c o a � a � E � 0 U 0 0 N `o a c 0 V_ 6 6 Q C R m > 6 E 0 U m b G m m 6 E 0 U 0 `o 0 v n c 0 .� V_ 6 a Q c C a n E 0 U G d 0 4 E 0 V 0 0 0 u a a ¢_ c t9 v n E 0 U a N C 0 0 c E 0 U 0 0 N \ \� U a Q L E U v s d E 0 v 0 0 r 4 E E N m m m 0 a 0 0 fA 0 M 0 Y3 0 W 0 fA 0 p C N R d Q m m � M M M � C7 _ C R R 0 0 F R O J N O F 0 � M m M U' Mn N m 0 a c a d x_ LL C d R O U u N G w ® O R - > LL O Q d d d O N r f7 ai C7 v vi �d a FY 2010 Clean Water Fund Water Quality Comprehensive Project Narrative The entire narrative portion of the application should be no more than 3 pages in length and should include the following topics as section headings Title: (10 words or less): ED -P5 Pond Improvements Project Abstract (30 words or less): The proposed project will provide protection of wetlands and the Mississippi River by improving an existing dry stormwater basin to increase infiltration, reducing stormwater runoff and associated nutrients and sediment. Overall Project Narrative (500 words or less): This section of the narrative should describe the level of project partners' coordination, cooperation and community support for the project, projects that have proven to be successful in similar circumstances or prior successful projects and the level of project partners' project management expertise and experience and any habitat benefits that may result from this project. The existing pond ED -P5 provides stormwater rate control for a 540 acre tributary area, which includes a mixture of land uses including single family residential, school property, and City park. Currently pond ED -P5 provides essentially no storm water quality treatment for the tributary area. The proposed ED -P5 Pond Improvements Project includes the excavation of two water quality features within the vicinity of the existing ED -P5. These two features will intercept certain inlets into pond ED -P5 for treatment prior to discharging back into ED -P5. The north feature will include a two -cell design providing water quality treatment for a 90 acre drainage area. The first cell will be a wet pond providing pre- treatment for storm water runoff discharging into the second cell, an infiltration basin. The wet pond will have an approximate surface area of 0.8 acres and a wet volume of approximately 3.3 acre -feet. The infiltration basin will have an approximate surface area of 0.5 acres. Sized to infiltrate 1 -inch of runoff from the existing impervious area (approximately 15.9 acres) draining to the pond, the infiltration basin will have a volume of approximately 1.3 acre feet and assuming a reasonable existing infiltration rate (based on HSG B soils) the basin will drain down in less than 48 hours. The infiltration basin will be restored with native vegetation to provide a deep root structure to maximize infiltration rates. This Form FY10 -1: Project Narrative native vegetation will have the ability to withstand prolonged inundation times. A skimmer structure will also be provided. The south feature will consist of a water quality pond that will provide treatment for over 200 acres of upstream drainage area. The water quality pond will have an approximate surface area of 0.7 acres and a wet volume of approximately 2.6 acre feet. A skimmer structure will also be included. The City of Cottage Grove and the South Washington Watershed District (SWWD) are committed to this project. Proposed improvements are specifically identified in Cottage Grove's approved Local Surface Water Management Plan. Further, SWWD's Watershed Management Plan sets of a goal of maintaining, or where practical improving, the water quality of wetlands and water bodies within the District. The proposed improvements will help SWWD reach its goal. Cottage Grove and SWWD have a long history of working together to manage Water resources in the District. Recently, the City and District partnered to complete the ED -P6 water quality improvements project that corrected an ongoing erosion issue, removed deposited material from a downstream wetland, and excavated a pretreatment cell upstream of this existing wetland. The construction costs for this project were paid for by the South Washington Watershed District, with the City performing the engineering and administration for the project. A similar arangement will be used for this proposed project utilizing CWF grant funding. Cottage Grove has years of project management experience and expertise on projects involving water resource management. In addition to the ED -P6 project, the City has successfully completed a $1.4 million pond improvement/expansion project in Hamlet Park. Explain how this project will mitigate or prevent current or future water quality impairments. The City's existing PondNET model was used to generate pollutant load reduction estimates associated with the two proposed water quality features. The PondNET model was originally developed for the City's Nondegradation Review and includes a high level of detail regarding the land use inputs and individually models water quality treatment features. The model shows annual reductions of 42 acre -ft, 106 Ibs of total phosphorus, and 48,369 Ibs of total suspended solids as a result of the proposed improvements. Water quality improvements as a result of this project will help prevent degradation of downgradient wetlands and further impairment of the Mississippi River. affected watershed and keep wate�on the land? Form FY10 -1: Project Narrative 2 The South Washington Watershed District is generally characterized by soils with high infiltration capacity. Thus, BMPs that increase contact time between stormwater runoff and the land are typically highly effective. The existing basin provides stormwater runoff rate control for a 540 acre watershed. The proposed improvements will provide stormwater runoff volume control, increased infiltration, and water quality treatment. Ultimately, by increasing contact time to keep water on the land, the proposed improvements will result in an annual reduction of 42 acre -ft of stormwater runoff mostly due to increased infiltration. Identify long -term inspections and maintenance needs of the project and how these activities will be accomplished. Inspection and maintenance of the ED -P5 Pond improvements is the responsibility of Cottage Grove, being part of the City's overall storm water system maintenance program. This maintenance program is identified in the City's Storm Water Pollution Prevention Plan (SWPPP), which is part of Cottage Grove's Municipal Separate Storm Sewer System (MS4) permit responsibility. The City funds this program through their Storm Water Utility. Regular pond inspection and maintenance occurs a minimum of once every 5- years, or more frequently as needed. Describe the coordination of this project with local groundwater plans. The project area is located within a drinking water supply management area (DWSMA) identified in the City of Cottage Grove Wellhead Protection Plan (WPP), Part 2 (2006). Infiltration improvements completed as part of this project will be designed in accordance with guidance provided in the WPP and 2003 Washington County Groundwater Plan. Please indicate any permits this project will require. Identify the current stage of the permitting process. This project will be carried out under the NPDES general construction permit and will require SWWD review. City of Cottage Grove staff will be responsible for all necessary permit and review processes. Permitting and review processes will be initiated when funding is secured. Form FY10 -1: Project Narrative If the project participants choose to consider the conservation value of land where Clean Water Fund conservation practices will be installed as local match, please describe the valuation and application methods. NA If using Clean Water Funds for incentives to encourage landowners to install structural practices or to adopt land management practices that improve or protect water quality, please describe the LGU's adopted policy for evaluating the necessity, method of calculation, and effectiveness of the proposed incentives. NA Form FY10 -1: Project Narrative 2010 Comprehensive Competitive Grant Application Page 1 of 1 r I } a) I z I z I Z I z I z l z C O 'w N V Q O. Q C I V > d C C C O V t i E O V O r O N r N N _T N _ U N W N C N O N O O O O O U O U N O U N O N O � O O O O (A O O ,.. LL U- L C U- } L LL LL L 7 LL N a LL U > N 7 . 7= Q a+ 0 G E �N L v O N m [L N N N .0 N _ U N W N C N O N O O O O O U O U N O U N O N O N N N N (0 (A O O N O O C O N 7 N a LL U > N 7 . 7= Q a+ 0 O N m [L N m O d U) m N (p O N N U O N (p N O N N C) O N _ U N W N m p a (A @ N O N N O (n N C 7 LL pl a+ 0 G E �N L v � Q R Q d 4 d Q d N e c s i A v L ,fs G 0 R (7 d W R T C , C d p�Jy � L N R Q T N a d o J O m m y V ( 4f O d m CD d 9 G R L 'a N > Q O d L d m O A O J to LL O m U Z U w Q m m m m m m m m O O N m [L 2010 Comprehensive Competitive Grant Application 1. Has your organization received Clean Water Legacy Grant funding in the past 3 years (yes /no)? No 1A: If so, for how much funding? $p 1 B: How much has been encumbered or authorized through local Board action? $o 1C: How much funding was spent? $p 1 D: If funding was returned to the State of Minnesota from a CWL Grant, how much was returned? $p 2. Has your organization undergone a financial audit from a third party within the last 2 years? Yes Page 1 of 1 p� B a 1. z� l :� N O n O 3 a s m N n O 3 a m m d a a a 0 v N N 0 0 3 D N S N_ N 0 l) O 3 a m 'u D a 9 N O_ 9 N D � A O 3 � '� � a m � c q 9 D a a G O V 0 O 0 o' A O 0 3 c a a 3 = N w N d A � n a a w 3 C 6 a � � m ' N_ D 9 a n O V 0 O N O O n O 3 a 'm m 0 N 2 n O 3 9 N W _� n a a n x 0 v m N O O n O 3 9 0_ N_ N R n O 3 9 N G m _� s s d c 0 v m 0 N O O Ci O v 3 0 L S y � � w e 7 w n 3 w 9 R O W q 6 4) D � 9 w 9 n w 0 v 0 (\ ( \ \ m 0 O m 'v c a m N 3 3 b N O O n O 3 v 'm s m N n 3 m m N n 9 d o o n m o m m D o. p n o ro a ' a x � 3 o 5Y m O 0 0 � 0 0 d 1 0 v 0 yi va w va b � 0 0 0 0 0 b N A A C w O fR FA !A EA Hi O i 4}, O O O O O O O O m 'v c a m N 3 3 b N O O n O 3 v 'm s m N n 3 m m N n 9 d FY 2010 Clean Water Fund Water Quality Comprehensive Project Narrative The entire narrative portion of the application should be no more than 3 pages in length and should include the following topics as section headings Title: (10 words or less): SPP -A 10 Pond Improvements Project Abstract (30 words or less): The proposed project will address inter - community flow issues identified in SWWD's watershed management plan and protect the Mississippi River from excess nutrient loading. Overall Project Narrative (500 words or less): This section of the narrative should describe the level of project partners' coordination, cooperation and community support for the project, projects that have proven to be successful in similar circumstances or prior successful projects and the level of project partners' project management expertise and experience and any habitat benefits that may result from this project. Drainage area SPP -A10 is located along the border of Cottage Grove and St. Paul Park, in the vicinity of 70th Street and Trunk Highway 61 (TH 61). Approximately 125 acres drain south through SPP -A10 and under TH 61 via a number of culverts. Flows then travel into St. Paul Park and ultimately the Mississippi River. Land cover tributary to SPP -A10 includes a mix of primarily rural residential and agricultural land. Future development in this area will transition the agricultural land uses to low density residential. Drainage from the northerly agricultural areas drains south via a ravine, crossing under 70th Street, into drainage area SPP -A10. Flows then drain overland via a ravine across the Wheels of Travel Incorporated property (PID 07- 027- 21 -22- 0001) prior to discharging to the TH 61 Right -Of -Way (ROW). This project proposes to purchase the Wheels of Travel Incorporated property, remove the existing buildings, and excavate a regional storm water pond on site. The proposed design will divert the low flows from the existing ravine into a two cell pond to provide water quality treatment. The first cell of the proposed two cell pond will be a wet pond having an approximate surface area of 0.4 acres and a wet volume of approximately 1.5 acre -feet. This cell will provide pre- treatment for storm water runoff prior to discharging into the second cell, an infiltration basin that will be sized to maximize surface area within the parcel. Both cells will Form FY10 -1: Project Narrative be constructed following guidance provided in the MN Stormwater Manual. Excessive flows will bypass the pond and continue toward the TH 61 ROW. This project is a collaborative effort between the City of Cottage Grove and the South Washington Watershed District (SWWD). Water quality pond improvements in the vicinity of SPP -A10 are specifically identified as a future implementation item in Cottage Grove's approved Local Surface Water Management Plan. Further, this project will adress inter - community flow issues between Cottage Grove and St. Paul Park as identified in SWWD's watershed management plan and bring the watershed into compliance with SWWD's total phosphorus loading standard of 0.22 Ibs /acre /year that is applicable to all watersheds tributary to the Mississippi River. Cottage Grove and SWWD have a long history of working together to manage Water resources in the District. Most recently, the City and District partnered to complete the ED -P6 water quality improvements project in the summer of 2009 that corrected an ongoing erosion issue, removed deposited material from a downstream wetland, and excavated a pretreatment cell upstream of the existing wetland. The construction costs for the project were paid for by the South Washington Watershed District, with the City performing the engineering and administration for the project. A similar arangement will be used for this proposed project utilizing CWF grant funding. Cottage Grove has years of project management experience and expertise on water resource management projects. In addition to the ED -P6 project, the City has successfully completed a $1.4 million pond improvement/expansion project in Hamlet Park. Explain how this project will mitigate or prevent current or future water quality impairments. The City of Cottage Grove's existing PondNET model was used to estimate pollutant load reductions associated with the proposed project. The PoncINET model was originally developed for the City's Nondegradation Review and includes a high level of detail regarding the land use inputs and individually models water quality treatment features. The results of the PoncINET model are presented in the following table. The model shows annual reductions of 14 acre - ft (32 %) of stormwater runoff, 25 Ibs (51%) of total phosphorus, and 12,839 Ibs (58 %) of total suspended solids. Water quality improvements as a result of this project will help mitigate excessive nutrient loading to the Mississippi River. How will this project address the hydrologic function of the immediate affected watershed and keep water on the land? The South Washington Watershed District is generally characterized by soils with high infiltration capacity. Thus, BMPs that increase contact time between stormwater runoff and the land are typically highly effective. The proposed improvements will provide stormwater runoff rate and volume control, increased Form FY10 -1: Project Narrative infiltration, and water quality treatment. Ultimately, by increasing contact time to keep water on the land, the proposed improvements will result in an annual reduction of 14 acre -ft of stormwater runoff mostly due to increased infiltration. Identify long -term inspections and maintenance needs of the project and how these activities will be accomplished. Inspection and maintenance of the SPP -A10 Pond improvements is the responsibility of Cottage Grove, being part of the City's overall storm water system maintenance program. This maintenance program is identified in the City's Storm Water Pollution Prevention Plan (SWPPP), which is part of Cottage Grove's Municipal Separate Storm Sewer System (MS4) permit responsibility. The City funds this program through their Storm Water Utility. Regular pond inspection and maintenance occurs a minimum of once every 5- years, or more frequently as needed. Describe the coordination of this project with local groundwater plans. The project area is located outside of municipal wellhead protection areas. The South Washington Watershed District watershed management plan identifies area soils as having high to very high infiltration potential and area groundwater as having moderate -high to high sensitivity to pollution. By utilizing a two -cell design that incorporates pre- treatment prior to infiltration, this project takes appropriate steps to limit the risk of groundwater contamination. Please indicate any permits this project will require. Identify the current stage of the permitting process. This project will be carried out under the NPDES general construction permit and will require SWWD review. City of Cottage Grove staff will be responsible for all necessary permit and review processes. Permitting and review processes will be initiated when funding is secured. Form FY10 -1: Project Narrative If the project participants choose to consider the conservation value of land where Clean Water Fund conservation practices will be installed as local match, please describe the valuation and application methods. NA If using Clean Water Funds for incentives to encourage landowners to install structural practices or to adopt land management practices that improve or protect water quality, please describe the LGU's adopted policy for evaluating the necessity, method of calculation, and effectiveness of the proposed incentives. NA Form FY10 -1: Project Narrative 2010 Comprehensive Competitive Grant Application Page 1 of 1 I O a) m m a O Z O Z O Z O Z O Z O Z f Q� . / T M M C t0 t0 O O O O O �.: LL LL LL LL LL LL LL LL C LL Q O ti 4x co ce) N V t0 c0 r f� r ✓ r - 00 (D O 0 0 O p E ca U N U LL U LL U N cu o O m U� U r c O O O > N IL V) asl 4 U v> ': m .4 a N 16 o N O N N d D C) U U U U 2) o (n N (n U o L (n U o U W to m (n (n 0 N w C C d Y L LL Q Q C LL N Y C LL r 4O ✓ 2 L C� G 0 L CD Q M '� ii C7 QJ C C ai C LL f0 U ~ U A N r ` LL Q n9 Q c R O Y y , fO Y J m L w .. �. �. O O ,a '� p„ LL u1 LL LL C C O C O r LL J U8 LL A W u Z V m m m m m m 00 m I O a) m m a 2010 Comprehensive Competitive Grant Application 1. Has your organization received Clean Water Legacy Grant funding in the past 3 years (yes /no)? No 1A: If so, for how much funding? $p 1 B: How much has been encumbered or authorized through local Board action? $p 1C: How much funding was spent? $p 1 D: If funding was returned to the State of Minnesota from a CWL Grant, how much was returned? $p 2. Has your organization undergone a financial audit from a third party within the last 2 years? Yes Page 1 of 1 a ag ag f� Z Y 4 C N O W m a c 0 .� v �a a Q c t7 v a E 0 v d . C d L d d E 0 V 0 0 N 0 N N m N a c a .� U . 6 Q C m U' v `m E O V m . C d L d c E 0 U 0 0 N 6 6 C 6 E 0 U m E 0 U a c 0 U a a c i v rn m n a � E m 0 U C a m > m � a E � u a � E O 0 U 0 0 N d G O N U u a c n a a n E 0 U a w c v c a E 0 v 0 N G O U a a 6 c n t7 m a a E 0 U m a c v t a n E 0 U 0 N C O .6 6 a R m a E 0 U a t N C N L a E 0 U 0 0 N { \! / ƒ� 0 u W U F a E U m d L c E 0 U 0 0 N i E E N W tll n `m O a ( � O N � O N O N c m a r r v o � c R R o ° F J ° O M O fR O f9 O R O J N O r R V V m 0 F o . C C 01 x LL N d d N R C 3 U � N 9 U N > 6 H y a c o R 91 N C9 ty (9 C N tO m n