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07-13-15 CC Mtg - Boulder Bridge Pond Feasibility ReportCITY OF SHOREWOOD City of Shorewood 5755 Country Club Road • Shorewood, MN 55331 FEASIB11 ITY Report February 23, 2015 (Revised) Boulder Bridge Pond City of Shorewood Hennepin County, Minnesota City Project No. 14 -14 WSP Project No. 2925 -04 - 477 Temperance Street � St. PauLMN 55101 WS Tel$51)286 -8450 - Fax: (651) 2B6 -8488 &A'Soc wsbeng.carn FEASIBILITY REPORT BOULDER BRIDGE POND CITY PROJECT NO. 14 -14 CITY OF SHOREWOOD, MINNESOTA MARCH 14, 2005 REVISED FEBRUARY 23, 2015 Prepared By: WSB & Associates, Inc. 477 Temperance Street St. Paul, MN 55101 651- 286 -8450 651- 286 -8488 (Fax) Revised Feasibility Report Boulder Bridge Pond City of Shorewood Project No. 14 -14 WSB Project No. 2925 -04 A WSB && Associates, htc engineering • planning • environmental • construction February 23, 2015 Honorable Mayor and City Council City of Shorewood 5755 Country Club Road Shorewood, MN 55331 Re: Feasibility Report Boulder Bridge Pond City of Shorewood Project No. 14 -14 WSB Project No. 2925 -04 Dear Honorable Mayor and City Council: 477 Temperance Street St. Paul, MN 55101 Tel: 651 - 286 -8450 Fax: 651 - 286 -8488 Transmitted herewith for your review is the revised feasibility report which addresses improvements and costs associated with the Boulder Bridge Pond project, originally presented to the Council in 2005. The report examines three alternate scenarios to alleviate future flooding concerns of the existing pond. We are available at your convenience to discuss this report. Please do not hesitate to contact me at 651- 286 -8453 if you have any questions regarding this proposed project. Sincerely, WSB & Associates, Inc. Paul Homby, PE City Engineer Enclosure Equal Opportunity Employer wsbeng.com CERTIFICATION I hereby certify that this plan, specification, or report was prepared by me or under my direct supervision and that I am a duly Licensed Professional Engineer under the laws of the State of Minnesota. im Stremel, PE Date: February 23, 2015 Lic. No. 45782 Quality Control Review Completed By: Paul Hornby, PE Date: February 23, 2015 Lic. No. 23359 Revised Feasibility Report Boulder Bridge Pond City of Shorewood Project No. 14 -14 WSB Project No. 2925 -04 TABLE OF CONTENTS TITLE SHEET LETTER OF TRANSMITTAL CERTIFICATION SHEET TABLE OF CONTENTS 1. EXECUTIVE SUMMARY ....................................................................... ..............................1 2. BOULDER BRIDGE POND ................................................................... ............................... 2 2.1 Introduction .................................................................................... ............................... 2 2. 1.1 Authorization ...................................................................... ..............................2 2.1.2 Scope ................................................................................. ............................... 2 2.1.3 Data Available .................................................................... ..............................2 2.2 Existing Conditions ......................................................................... ..............................2 2.2.1 Pond ................................................................................... ............................... 2 2.2.2 Drainage ............................................................................ ............................... 3 2.3 Proposed Improvements ................................................................. ............................... 3 2.3.1 Option 1 — Gravity Sewer to Smithtown Road .................. ............................... 4 2.3.2 Option 2 — Gravity Storm Sewer to the Wetland East of Brentridge Drive ..... 4 2.3.3 Option 3 — Lift Station and Forcemain .............................. ............................... 5 2.3.4 Regulatory Permits ............................................................ ............................... 7 2.3.5 Phasing .............................................................................. ............................... 7 2.3.6 Maintenance of Traffic ...................................................... ............................... 7 2.3.7 Easements .......................................................................... ............................... 7 3. FINANCING .............................................................................................. ..............................9 3.1 Opinion of Cost .............................................................................. ............................... 9 3.2 Funding .......................................................................................... ............................... 9 4. PROJECT SCHEDULE .......................................................................... .............................12 5. FEASIBILITY, NECESSITY AND COST EFFECTIVENESS .......... .............................13 6. FEASIBILITY AND RECOMMENDATION ....................................... .............................13 Revised Feasibility Report Boulder Bridge Pond City of Shorewood Project No. 14 -14 WSB Project No. 2925 -04 TABLE OF CONTENTS (Continued) Appendix A Location Map Existing Pond with Property Owners and Easements Existing Drainage Area Proposed Improvements Option 1 Proposed Improvements Option 2 Proposed Improvements Option 3 Appendix B Photographs of Existing Pond Appendix C Opinions of Probable Cost Appendix D Assessment Map Preliminary Assessment Rolls Appendix E Historical Aerial Photographs Revised Feasibility Report Boulder Bridge Pond City of Shorewood Project No. 14 -14 WSB Project No. 2925 -04 1. EXECUTIVE SUMMARY Revisions to the existing Boulder Bridge Pond Feasibility Report, originally prepared in March of 2005, were requested by the City Council after discussion with residents and staff. Improvements to the Boulder Bridge Pond were initially proposed to be constructed in 2005; however, City Council postponed the project. The Boulder Bridge Pond was constructed to receive runoff from approximately 10.29 acres. The pond does not have a dedicated outlet and requires the City to install a temporary pump to discharge overflow from the pond to Smithtown Road as necessary after rainfall events. Pumping of the pond takes a considerable amount of effort from Public Works and complaints regarding the noise when the pump is running have been received from homeowners within close proximity of the pumping operations. Three potential opportunities have been investigated for a pond outlet modification to improve area drainage and meet City design standards, including the requirements of the Minnehaha Creek Watershed District: • Option 1: Gravity storm sewer to the existing storm system located within Smithtown Road. • Option 2: Gravity storm sewer to the existing wetland located east of Brentridge Drive. • Option 3: Stormwater lift station and forcemain to the existing storm system located within Boulder Bridge Lane. A map showing the project location can be found on Figure I in Appendix A. Total estimated project costs for the proposed improvements range from $193,740 to $239,250 depending on which option is considered. These costs incorporate 2014 construction costs projected to a 2015 cost basis, including a 10% construction contingency and indirect costs, in the amount of 25% of the estimated construction costs. The indirect costs include legal, engineering, administrative, and financing considerations. Funding for the project will be provided through the special assessments to benefiting properties and the City Storm Water Fund. The enclosed project schedule proposes construction beginning in July 2015 with substantial completion in September 2015. Final completion and restoration is slated for June 2016. This project is feasible, necessary, and cost - effective from an engineering standpoint and the City Council should consider moving forward with the project as proposed herein. The economic feasibility of this project will need to be determined by the City Council. Revised Feasibility Report Page I Boulder Bridge Pond City of Shorewood Project No. 14 -14 WSB Project No. 2925 -04 2. BOULDER BRIDGE POND 2.1 Introduction 2.1.1 Authorization The Shorewood City Council authorized the revision to the existing engineering feasibility report prepared in 2005 to investigate a dedicated outlet for the Boulder Bridge Pond. This project has been designated as City Project No. 14 -14. 2.1.2 Scope Originally proposed for construction in 2005, the proposed project outlines the most cost - effective and acceptable alternatives to control the water level of Boulder Bridge Pond. The location of the Boulder Bridge Pond is shown in Figure I in Appendix A 2.1.3 Data Available Information and materials used in the preparation of this report include the following: • Hennepin County property records • Stormwater Management Plan prepared for the City of Shorewood by WSB & Associates, Inc. • USGS topographical map(s) • City of Shorewood Record Drawings • City of Shorewood Subdivision Plats • Field observations of the area • Telephone conversations with Xcel Energy representatives • Historical aerial photographs provided by Historic Information Gatherers, Inc. • City of Shorewood Assessment Policy 2.2 Existing Conditions 2.2.1 Pond The Boulder Bridge Pond was constructed as a stormwater storage and treatment pond with the Boulder Bridge 2nd Addition located north of Smithtown Road and west of Howards Point Road. Its east shoreline is accessible from Howards Point Road. The remainder of the pond is accessible through the rear yards of the adjoining property in Boulder Bridge 2nd Addition. The pond itself is located mostly in a drainage easement and partially on private property. Figure 2 in Appendix A shows the existing pond, property line, property ownership, drainage and utility easements, and public rights -of -way. Revised Feasibility Report Page 2 Boulder Bridge Pond City of Shorewood Project No. 14 -14 WSB Project No. 2925 -04 Stormwater runoff from approximately 10.29 acres of the development is conveyed into Boulder Bridge Pond. The development generally consists of low density residential private property, residential streets, and public right -of -way. Figure 3 in Appendix A shows the specific drainage area that makes up the 10.29 acres and contributing property. Historic aerial photographs and construction plans indicate the pond was manmade in 1984. Aerial photographs between 1937 and 1980 clearly show the project area as being agricultural in nature. Historical and aerial photographs dated between 1937 and 2003 are included in Appendix D. When the pond was constructed, there was no designated outlet or level control. The pond level was originally designed to be controlled by natural infiltration of water into the ground; however there has since been a need for Public Works to install a portable pump and discharge hose to keep the pond elevation at an acceptable level during a number of rainfall events. The adjoining property owners have recognized potential for damage without a dedicated outlet and have petitioned the City Council to provide the necessary improvements. Photographs in Appendix B show the pond as it existed in August 2004. In Photo 1, notice the proximity of the water surface to the walkout basement elevation of the brick house. 2.2.2 Drainage The area that drains into the Boulder Bridge Pond (10.29 acres) is a tributary to the wetland east of Brentridge Drive. The existing storm sewer facilities are present along the following roadways: A 21 -inch diameter perforated reinforced concrete storm sewer exists within Smithtown Road between Howards Point Road and Boulder Bridge Drive with a 12 -inch diameter pipe stubbed north out of the pavement just west of Howards Point Road. A set of catch basins served by 15 -inch diameter storm sewer exist at the intersection of Boulder Bridge Lane and Boulder Bridge Road. Brentridge Drive has three sets of catch basins that collect roadway drainage and discharge into a large wetland east of Brentridge Drive. There is no indication of public storm sewer between Brentridge Drive and Howards Point Road. 2.3 Proposed Improvements The immediate vicinity surrounding the Boulder Bridge Pond is higher than the land to the south and east. The pond may be thought of as "perched" within the larger drainage area. The elevation of the pond relative to the surrounding land provides the opportunity for a gravity outlet, or pumping or lifting water from the pond to the existing nearby storm sewer. Revised Feasibility Report Page 3 Boulder Bridge Pond City of Shorewood Project No. 14 -14 WSB Project No. 2925 -04 As part of this study, three options were reviewed to determine a cost effective solution to control the surface water elevation of Boulder Bridge Pond. The three improvement options examined in this report include the following: • Option 1: Gravity storm sewer to the existing storm system located within Smithtown Road. • Option 2: Gravity storm sewer to the existing wetland located east of Brentridge Drive. • Option 3: Stormwater lift station and forcemain to the existing storm system located within Boulder Bridge Lane. 2.3.1 Option I — Gravity Sewer to Smithtown Road Improvements proposed with Option 1 include directing stormwater discharge from Boulder Bridge Pond through a gravity sewer system to the existing 21 -inch storm sewer located in Smithtown Road. This option conveys stormwater out of the existing sub - watershed. Figure 4 of Appendix A illustrates the proposed routing for Option 1. Advantages to Option 1 • Gravity sewer is dependable and does not require electrical power to operate. • The sewer will be built on public right -of -way or within the property owned by the home owners association (no need to involve disinterested parties) without disrupting pavements. • The gravity system provides an opportunity to extend storm sewer for future use in other areas and drain a portion of Howards Point Road. • Perforated pipe along Smithtown Road would assist in recharging the aquifer with stormwater runoff, which is encouraged by the watershed district and other regulatory agencies. Disadvantages to Option 1 • Stormwater is diverted out of the natural sub - watershed. • The existing storm sewer on Smithtown Road is a perforated concrete pipe and was not built with the intention of accepting discharge from the pond. 2.3.2 Option 2 —Gravity Storm Sewer to the Wetland East of Brentridge Drive Improvements proposed with Option 2 include directing the stormwater discharge from Boulder Bridge Pond through a gravity storm sewer system to the large wetland east of Brentridge Drive. To economically build the sewer and stay within the larger watershed, it is necessary to route the storm sewer across Howards Point Road which involves crossing private property and Brentridge Drive. Figure 5 of Appendix A illustrates the proposed routing for Option 2. Revised Feasibility Report Page 4 Boulder Bridge Pond City of Shorewood Project No. 14 -14 WSB Project No. 2925 -04 Advantages to Option 2 • Stormwater remains within the natural sub - watershed. Gravity sewer is dependable and does not require electrical power to operate. Gravity sewer provides an opportunity to extend storm sewer for future use to other areas and provide additional drainage along the discharge route. Disadvantages to Option 2 • Necessary easement acquisition from one or more property owners along Howards Point Road. • The route crosses two roadways requiring replacement of existing pavement and curb. • Major disruption within the side yards and backyards of property owners that will not receive direct benefit from the project. 2.3.3 Option 3 — Lift Station and Forcemain Improvements proposed with Option 3 include directing stormwater discharge from Boulder Bridge Pond through a small diameter forcemain to the existing storm sewer at the intersection of Boulder Bridge Road and Boulder Bridge Lane. Pump Selection (Assuming a 100 -year storm event) Type II 24 -hour rainfall = 5.90 inches The pond would need to discharge 5.0 ft3 /sec to limit the rise of the pond to 1.0 foot. 5.0 ft3 /sec equates to approximately 2,245 gallons /minute. Total dynamic head approximately 10 feet. Pump selection: Gorman -Rupp JS6F60 -E42 6 -inch diameter discharge 42 horsepower Pumps of this size require three -phase power and are available in one of three voltages: 230 volt, 460 volt, and 575 volt. The higher the voltage, the more efficient the pump will operate. Generally, 460 volts electrical power is used in these applications. Existing power in the adjoining residential subdivision is single -phase 120 -240 volt power. Revised Feasibility Report Page 5 Boulder Bridge Pond City of Shorewood Project No. 14 -14 WSB Project No. 2925 -04 The closest three -phase power to the site is 460 volts on Smithtown Road. To bring three - phase, 460 volt power to the site, it will be necessary to construct a power line along Howards Point Road between the proposed pump and Smithtown Road. According to discussions with personnel at Xcel Energy, the cost of constructing the power line will be at the City's expense. Figure 6 of Appendix A illustrates the proposed routing for Option 3. Advantages to Option 3 • Stormwater remains within the natural sub - watershed. • Construction limits remain confined to those who will benefit from the prod ect. • The sewer will be built without disrupting pavements. Disadvantages to Opfion 3 • Reliance on electrical power to operate requiring additional three -phase electrical to be installed to the lift station from Smithtown Road. Lift station operation requires long -term maintenance and repair. • Due to the location of the forcemain and lift station, maintenance and repair will be difficult. • Negative aesthetic value of the pump structure and control panel. • Potential to pump more water than the existing storm sewer on Boulder Bridge Road can accept. Generally, a gravity storm sewer system is preferred over a forcemain option. Many times, it is not cost - effective to equip small, low -use lift stations with screens, grinders, or redundant pumps and power. The nature of lift stations and the constant need for power and maintenance makes them less desirable, even if the initial cost is less than a gravity sewer. The lifetime operations and maintenance costs of a lift station and forcemain will exceed the lifetime operations and maintenance costs of a gravity storm sewer. In addition to operations and maintenance costs, there are reliability issues, including: • Lift stations are mechanical devices and even with the best maintenance programs are subject to failure. • Generally, stormwater lift stations are not operated on a routine basis (as- needed basis). • The lack of pump and valve "exercise" tends to allow metallic parts to corrode or "stick", this, further reducing reliability. • Stormwater lift stations are subject to debris collection; without routine observation and cleaning, debris could clog or damage a portion of the lift station mechanism. • Lift stations rely on electrical power, but power is most likely to be interrupted during a storm event, which is when it is most needed. Revised Feasibility Report Page 6 Boulder Bridge Pond City of Shorewood Project No. 14 -14 WSB Project No. 2925 -04 23.4 Regulatory Permits An NPDES permit for construction activity will not be required since less than one acre is proposed to be disturbed by construction activities with the project. A permit from the Minnehaha Creek Watershed District (MCWD) will be required for erosion control, wetland protection, and stormwater management for the proposed storm sewer improvement. Because the pond is manmade, it is not subject to all the regulations of a natural wetland. The project is expected to require ground water dewatering to facilitate construction. Prior to dewatering, the contractor shall apply for a DNR Water Appropriations permit. 2.3.5 Phasing The project shall bid and build as a single -phase project. Construction can be completed within one construction season. 2.3.6 Maintenance of Traffic The project can be constructed with minor interruptions to vehicular traffic. Traffic can be maintained with the exception of intermittent delays. 2.3.7 Easements There are a number of properties that will require drainage and utility easements, permanent easements and temporary construction easements. Easements required for each proposed option include: Option 1 A single easement will be necessary from the Boulder Bridge Farm Association for the construction of storm sewer adjacent to Howards Point Road. The majority of the property owners benefitting from this project are members of this association. It is anticipated that the association will be favorable to grant the easement. Option 2 A series of easements exist along the sides and rear of the lots that front on Brentridge Drive. These easements provide a partial pathway along the proposed route for Option 2. A permanent easement is needed from one of two properties on the east side of Howards Point Road. An easement will be necessary from the Boulder Bridge Farm Association for the proposed storm sewer on the west side of Howards Point Road. Temporary construction easements will be necessary adjacent to existing permanent easements where permanent easements are not adequate for construction. Easements east of Howards Point Road are expected to be difficult to obtain. Revised Feasibility Report Page 7 Boulder Bridge Pond City of Shorewood Project No. 14 -14 WSB Project No. 2925 -04 Option 3 An easement from one property owner within the Boulder Bridge 2nd Addition and the Boulder Bridge Farm Association will be necessary to construct Option 3. These easements should easily be obtained since there will be direct benefit to the grantor of the easement. Revised Feasibility Report Page 8 Boulder Bridge Pond City of Shorewood Project No. 14 -14 WSB Project No. 2925 -04 3. FINANCING 3.1 Opinion of Cost A detailed engineer's opinion of probable costs for the proposed improvements, including all three options can be found in Appendix C of this report. The opinion of probable cost incorporates bid prices from the 2014 construction season projected to a 2015 cost basis including a 10% construction contingency. Indirect costs are typically 25% of the construction cost and include engineering, legal, financing, and administrative costs. These costs do not include the easement an acquisition process or the actual easements themselves. Table I below provides a summary of the opinion of probable costs for the Boulder Bridge Pond proj ect: Table 1 Summary of Costs Boulder Bridge Pond Total Option 1 $193,740 Option 2 $1945870 Option 3 $239,250 3.2 Funding Funding for the project may be provided through one of three options: 50% Assessed The City may elect to have a portion of the project costs paid through City Stormwater Funds and a portion of the project costs assessed to the benefitting property owners within the drainage area. Special assessments to benefiting properties would be proposed to fund between 50% of the drainage improvements identified for the project, with the remaining 50% funded with City funds. Assessments for this project were calculated using the acreage method. A summary of the proposed assessment calculations are shown in Table 2. The proposed assessment roll is included in Appendix D of this report, along with an Assessment Map ID highlighting the benefitting properties. Revised Feasibility Report Page 9 Boulder Bridge Pond City of Shorewood Project No. 14 -14 WSB Project No. 2925 -04 Table 2 — Boulder Bridge Pond Assessment Calculations Assessed Total Estimated Estimated Project Area Drainage Project Assessable Assessment City Improvements Costs Acreage* Rate per Funding (50%) Acre Option 1 $193,740 $96,870 10.29 $9,413.90 $106,096 Option 2 $194,870 $97,435 10.29 $9,468.66 $106,715 Option 3 $239,250 $119,625 10.29 $11,625.36 $131,018 * The acreage assessed includes all land contributing to the pond, including public right - of -way. 100% Assessed The City may elect to assess the entire project to benefiting property owners within the drainage area. Special assessments to benefiting properties would be proposed to fund between 100% of the drainage improvements identified for the project. Assessments for this project were calculated using the acreage method. A summary of the proposed assessment calculations are shown in Table 3. The proposed assessment roll is included in Appendix D of this report, along with an Assessment Map ID highlighting the benefitting properties. Table 3 — Boulder Bridge Pond Assessment Calculations Assessed Total Estimated Estimated Project Area Drainage Project Acreage* Assessment City Improvements Costs Acreage Rate per Funding (100 %) Acre Option 1 $193,740 $193,740 10.29 $18,827.80 $18,452 Option 2 $194,870 $194,870 10.29 $18,937.32 $18,559 Option 3 $239,250 $239,250 10.29 $23,250.73 $22,786 Revised Feasibility Report Page 10 Boulder Bridge Pond City of Shorewood Project No. 14 -14 WSB Project No. 2925 -04 0% Assessed The City may elect to asses none of the project to the benefiting property owners and fund the project 100% with City Stormwater Funds. Revised Feasibility Report Page 11 Boulder Bridge Pond City of Shorewood Project No. 14 -14 WSB Project No. 2925 -04 4. PROJECT SCHEDULE The proposed project schedule for the Boulder Bridge Pond project is as follows: Accept Feasibility Report/Set Public Improvement Hearing ............. February 23, 2015 Public Improvement Hearing /Order Project ........... ............................... March 23, 2015 Approve Plans and Specifications /Authorize Ad for Bid ......................... May 25, 2015 OpenBids ................................................................... ............................... June 25, 2015 Award Construction Contract ................ ............................... ........................... July 2015 Begin Construction .............................................. ............................... July /August 2015 * Schedule assumes any necessary private utility work is completed prior to start of construction. Revised Feasibility Report Page 12 Boulder Bridge Pond City of Shorewood Project No. 14 -14 WSB Project No. 2925 -04 5. FEASIBILITY, NECESSITY AND COST EFFECTIVENESS The Boulder Bridge Pond project includes storm sewer improvements to the existing pond to maintain an acceptable surface water elevation. Based on the preceding discussions, the following conclusions have been made: If a dedicated outlet to Boulder Bridge Pond is not constructed, the City will have to continue its periodic pumping to maintain an acceptable surface elevation of the pond. From a municipal operations perspective, this is not a desirable use of resources. Should there be a failure to maintain a reasonable surface elevation, there is a potential for substantial and recurring water damage. 2. Should the pond be allowed to overflow, not only would there be significant damage to the adjoining homes, there would be water flowing across Howards Point Road, which is a hazard to the general public. As water travels overland to the east, there is additional potential for liability and property damage. Based on our analysis and data presented, it is recommended that the City proceed with constructing the improvements as outlined in Option 1. The storm sewer improvements proposed in Option I are not only the most economical, but based on the long -term maintenance and operations costs, benefits to the neighborhood, minimal impacts to surrounding properties or streets, and ability to keep construction confined to those properties that will directly benefit, make this option the most cost effective choice. 6. FEASIBILITY AND RECOMMENDATION The total cost of the Boulder Bridge Pond project is estimated to be $193,740, if Option 1 is considered. The project is feasible, necessary, and cost - effective from an engineering perspective. WSB & Associates, Inc. recommends proceeding with the proposed improvements as detailed in this report. The economic feasibility of this project will be determined by the City Council. Based on the information contained in this report, it is recommended to proceed with the improvements as outlined herein. Revised Feasibility Report Page 13 Boulder Bridge Pond City of Shorewood Project No. 14 -14 WSB Project No. 2925 -04 APPENDIX A Location Map Existing Pond with Property Owners and Easements Existing Drainage Area Proposed Option 1 Proposed Option 2 Proposed Option 3 Revised Feasibility Report Boulder Bridge Pond City of Shorewood Project No. 14 -14 WSB Project No. 2925 -04 MOUND Pelican d Point Goose Island ay °z Spray a 9° Island PheLps Bay s�> �a Shady c CIR° -A LS <q Island GNL AND by zNl ro CIR° Q N. oet k q SNADr zISLAND < ODD CFO A Ho Word POlnt Enchanted Island o ISLAND KSEW 0 Q RD. O 0 WCA,atosa of RD° PIN Island o B� o � � KATHLEEN BRYNMA CBRID PL. OU HENNEPIN j COUNTY �ARVER COU Smithtown Bay I Lake Minrnetonka Upper Lake EDGEWOOD CIR Project Loc, Wig ti 0I4 SCypOINTE �� aT C7.- P` ow a DN RD° m LUE a a P° BEVERLY mr -o DR. MAPLE AVE. O„ a I'll a SH MAPLE RIDGE L, Lake Virginia VICTORIA h° 0 PQ w.. �v Q' _ > VALLEIWO P J SUNNY w Eval > L✓ILD ROSE o J C W a o w y 0 Q � a SMITHTOWN w LA. z G1S � N w w w wODO as� GT � m VIEW OOU OAKS Dy � DR° OAK LEAF R. PA - 477 Temperance Street Project Loaction Map WSB Project No. 02925 -040 Date: January 2015 WSB St. Paul, MN 55101 Tel. (651)286.8450• Fax: (651)286. 8488 Boulder Bridge Pond M. wsbeng.cam Improvements for the city of Figure 1 Shorewood, Minnesota K:A 02925- 040ACadAExhibits \ fig- Ol.dgn - 477 Temperance Street Existing Property Lines & Easements VVSB Project No. 02925 -040 Date: January 2015 A St. Paul, MN 55101 WSB Tel: (651)286.8450• Fax: (651)286. 8488 Boulder Bridge Pond wsbeng.cam Improvements for the city of Figure 2 Shorewood, Minnesota K:A 02925- 040ACadAExhibits \ fig- 02.dgn - 477 Temperance Street Existing Drainage Area WSB Project No. 02925 -040 Date: January 2015 A St. Paul, MN 55101 WSB Tel: (651)286.8450• Fax: (651)286. 8488 Boulder Bridge Pond wsbeng.cam Improvements for the city of Figure 3 Shorewood, Minnesota K:A 02925- 040ACadAExhibits \ fig- 03.dgn WSB Project No. 02925 -040 Date: January 2 - 477 Temperance Street Proposed Improvements - Option 1 ry 015 I A St. Paul, MN 55101 Tel: (651)286.8450• Fax: (651)286. 8488 Boulder Bridge Pond wsbeng.cam Improvements for the city of Figure 4 \ Shorewood, Minnesota K:A 02925- 040ACadAExhibits \ fig- 04.dgn Btytnna�nre Place f" EXISTING DRAINAGE ; AND UTTLTTY EASEMENTS CONTROL -� d STRUCTURE, o� e lane PROPOSED STORM SEWER az` a q° o, z w {r V-oa o o,a d ya °e ry aet or .� Smithtown Road 7 tdge Lane l Blue R 0 150 300 WSB Project No. 02925 -040 Date: January 2 - 477 Temperance Street Proposed Improvements - Option 2 ry 015 INSB St. Paul, MN 55101 Tel. (651)286.8450• Fax: (651)286.8488 Boulder Bridge Pond M. wsbeng.cam Improvements for the city of Figure 5 Shorewood, Minnesota K:A 02925- 040ACadAExhibits \ fig- 05.dgn 0 150 300 WSB Project No. 02925 -040 Date: January 2 - 477 Temperance Street Proposed Improvements - Option 3 ry 015 INSB St. Paul, NIN 55101 Tel: (651)286.8450• Fax: (651)286. 8488 Boulder Bridge Pond wsbeng.cam Improvements for the city of Figure 6 Shorewood, Minnesota K:A 02925- 040ACadAExhibits \ fig- 06.dgn APPENDIX B Photographs of Existing Pond Revised Feasibility Report Boulder Bridge Pond City of Shorewood Project No. 14 -14 WSB Project No. 2925 -04 m 19 w WEM r , . FIGURE 3 Existing Pend August, 04 Tow a r ;ti. - ' .. s •'� . T� � ,til� ra • PVC x�ir�rw+ �� • T •i_• �- - f, fit'. 1 r W-4 W ll FIGURE 4 Existing Pond r�i -i August, 04 APPENDIX C Opinions of Probable Cost Revised Feasibility Report Boulder Bridge Pond City of Shorewood Project No. 14 -14 WSB Project No. 2925 -04 OPINION OF PROBABLE COSTS OPTION 1 - GRAVITY STORM SEWER TO SMITHTOWN ROAD PROJECT NO. 2925 -04 SHOREWOOD, MN JANUARY 26, 2015 No. Mat. No. Item Units Estimated Unit Price Estimated Quantity Estimated Cost OPTION 1 1 2021.501 MOBILIZATION (5 %) LUMP SUM $7,000.00 1 7,000.00 2 2101.501 CLEARING ACRE $10,000.00 0.5 5,000.00 3 2101.506 GRUBBING ACRE $10,000.00 0.5 5,000.00 4 2104.501 REMOVE CONCRETE CURB LIN FT $10.00 80 800.00 5 2104.503 REMOVE CONCRETE WALK SQ FT $10.00 175 1,750.00 6 2104.505 REMOVE BITUMINOUS PAVEMENT SQ YD $20.00 140 2,800.00 7 2104.509 REMOVE MANHOLE EACH $1,000.00 1 1,000.00 8 2104.511 SAWING CONCRETE PAVEMENT (FULL DEPTH) LIN FT $15.00 20 300.00 9 2104.513 SAWING BITUMINOUS PAVEMENT (FULL DEPTH) LIN FT $15.00 150 2,250.00 10 2360.505 BITUMINOUS PATCHING TON $250.00 50 12,500.00 11 2503.511 12 " -15" RC PIPE SEWER DESIGN 3006 CLASS V LIN FT $45.00 1,000 45,000.00 12 2506.501 CONSTRUCT DRAINAGE STRUCTURE DESIGN 48 -4020 EACH $3,000.00 5 15,000.00 13 2506.502 CONSTRUCT DRAINAGE STRUCTURE (OUTLET CONTROL STRUCTURE) EACH $10,000.00 1 10,000.00 14 2521.501 4" CONCRETE WALK SQ FT $20.00 175 3,500.00 15 2531.501 CONCRETE CURB & GUTTER DESING B618 LIN FT $50.00 80 4,000.00 16 2563.601 TRAFFIC CONTROL LUMP SUM $10,000.00 1 10,000.00 17 2575.501 RESTORATION SEEDING LUMP SUM $15 000.00 1 15 000.00 SUBTOTAL OPTION 1 - GRAVITY STORM SEWER TO SMITHTOWN ROAD + 10% CONTINGENCIES 140,900.00 14 090.00 SUBTOTAL OPTION 1 - GRAVITY STORM SEWER TO SMITHTOWN ROAD + 25% ADMINISTRATIVE, LEGAL, ETC. 154,990.00 38,748.00 TOTAL OPTION 1 - GRAVITY STORM SEWER TO SMITHTOWN ROAD 193,738.00 OPINION OF PROBABLE COSTS OPTION 2 - GRAVITY STORM SEWER TO WETLAND EAST OF BRENTRIDGE PROJECT NO. 2925 -04 SHOREWOOD, MN JANUARY 26, 2015 No. Mat. No. Item Units Estimated Unit Price Estimated Quantity Estimated Cost OPTION 2 1 2021.501 MOBILIZATION (5 %) LUMP SUM $5,600.00 1 $5,600.00 2 2104.501 REMOVE SEWER PIPE (STORM) LIN FT $12.00 160 $1,920.00 3 2104.501 REMOVE CONCRETE CURB LIN FT $10.00 150 $1,500.00 4 2104.509 REMOVE DRAINAGE STRUCTURE EACH $750.00 1 $750.00 5 2104.505 REMOVE BITUMINOUS PAVEMENT SQ YD $20.00 325 6,500.00 6 2104.513 SAWING BITUMINOUS PAVEMENT (FULL DEPTH) LIN FT $15.00 120 1,800.00 5 2360.505 BITUMINOUS PATCHING TON $250.00 90 $22,500.00 6 2501.515 24" RC APRON EACH $1,250.00 1 $1,250.00 7 2503.511 12" RC PIPE SEWER DESIGN 3006 CL V LIN FT $40.00 610 $24,400.00 8 2503.511 24" RC PIPE SEWER DESIGN 3006 CL V LIN FT $50.00 205 $10,250.00 9 2511.501 RANDOM RIPRAP CLASS III CU YD $250.00 5 $1,250.00 10 2531.501 CONCRETE CURB & GUTTER DESIGN D412 LIN FT $50.00 150 $7,500.00 11 2506.501 CONSTRUCT DRAINAGE STRUCTURE DESIGN 48 -4020 EACH $3,000.00 6 $18,000.00 12 2506.502 CONSTRUCT DRAINAGE STRUCTURE DESIGN SPECIAL 1 (2'X3') EACH $1,500.00 1 $1,500.00 13 2506.502 CONSTRUCT DRAINAGE STRUCTURE (OUTLET CONTROL STRUCTURE) EACH $10,000.00 1 $10,000.00 14 2563.601 TRAFFIC CONTROL LUMP SUM $2,000.00 1 $2,000.00 15 2575.505 RESTORATION SODDING LUMP SUM $25,000.00 1 $25,000.00 SUBTOTAL OPTION 2 - GRAVITY STORM SEWER TO WETLAND EAST OF BRENTRIDGE + 10% CONTINGENCIES $141,720.00 $14,172.00 SUBTOTAL OPTION 2 - GRAVITY STORM SEWER TO WETLAND EAST OF BRENTRIDGE + 25% ADMINISTRATIVE, LEGAL, ETC. $155,892.00 $38,973.00 TOTAL OPTION 2 - GRAVITY STORM SEWER TO WETLAND EAST OF BRENTRIDGE $194,865.00 OPINION OF PROBABLE COSTS OPTION 3 - LIFT STATION AND FORCE MAIN PROJECT NO. 2925 -04 SHOREWOOD, MN JANUARY 26, 2015 No. Mat. No. Item Units Estimated Unit Price Estimated Quantity Estimated Cost SCHEDULE C - WATER SYSTEM IMPROVEMENTS 1 2021.501 MOBILIZATION (5 %) LUMP SUM $8,000.00 1 $8,000.00 2 2101.501 CLEARING ACRE $10,000.00 0.25 $2,500.00 3 2101.506 GRUBBING ACRE $10,000.00 0.25 $2,500.00 4 2503.602 LIFT STATION LUMP SUM $50,000.00 1 $50,000.00 5 2503.602 ELECTRICAL CONTROLS LUMP SUM $5,000.00 1 $5,000.00 6 2503.602 VALVE CHAMBER EACH $5,000.00 1 $5,000.00 7 2503.602 CONNECT INTO EXISTING DRAINAGE STRUCTURE EACH $1,000.00 1 $1,000.00 8 2503.602 POWER TO LIFT STATION LUMP SUM $20,000.00 1 $20,000.00 9 2504.602 4" PVC FORCE MAIN LIN FT $25.00 1,000 $25,000.00 10 2505.603 12" STEEL CASING PIPE LIN FT $500.00 80 $40,000.00 2575.502 RESTORATION (SEEDING) LUMP SUM $5,000.00 1 $5,000.00 11 2575.505 RESTORATION SODDING) LUMP SUM $10,000.00 1 $10,000.00 SUBTOTAL OPTION 3 - LIFT STATION AND FORCE MAIN + 10% CONTINGENCIES $174,000.00 $17,400.00 SUBTOTAL OPTION 3 - LIFT STATION AND FORCE MAIN + 25% ADMINISTRATIVE, LEGAL, ETC. $191,400.00 $47,850.00 TOTAL OPTION 3 - LIFT STATION AND FORCE MAIN $239,250.00 APPENDIX D Assessment Map Preliminary Assessment Rolls Revised Feasibility Report Boulder Bridge Pond City of Shorewood Project No. 14 -14 WSB Project No. 2925 -04 m a m m a m ® m� m m m m ® ® ® ® ®® m APPENDIX E Historical Aerial Photographs Revised Feasibility Report Boulder Bridge Pond City of Shorewood Project No. 14 -14 WSB Project No. 2925 -04 �r Boulder Bridge 2003=� Shorewood, Minnesota H[G Project Number: MAEr2107 < i Client Project Number. 1074.42 Ifi ISTORICAL NFORMATION Ci AT I I I R r R I N C Approxi mate Scale 1:60000"-500) d L2w:24 1=- L IT- *JIM. { L ALI'" I ra ' NA IL 17 A I o to ,- Boulder Bridge 1997 Shorewood, Minnesota H1G Project Number: MAE -2107 E{ I s r n R I Cr n i Client Project Number: 1074.92 INFORMATION LATH E RERS, I NC" Approximate Scale 1:660 (l" =500') iOT •�°,- 16-7 It ^ 'r F "ate •� :• '1�n7' ^.� � • a- 10, Ne ♦ J �� i- •` 'r�• -" •� ,~rte AA tA 4k - A r .r MIN ^ 1 t • i A� �� M .- -� Boulder Bridge 1991 Shorewood, Minnesota HIG Project Number: MAE -2107 UYenr Project Number: 1074.92 H ISTpRY C: A L 1 N f O R AT 10 Hi t GATHERERS.INY:' Approxi mtiteScale 1:60W (1"-500') ' p a r I j I ll `i *L� it l 3 H Boulder Bridge 1984 Shorewood, Minnesota H[G Project Number. MAE -2107 Client Projecr Number. 107$92 Illllsiull l[ I \ fllk t4 .�I 111 \' j I I k E r} I R l .A rpyoxi mate Scale 1:6000 0 500) N' �� 4• rYro� i -4W Y 1 z�i•! t q...0 Hl� Boulder Bridge 1980-�- Shorewood, Minnesota H1G Project Number: MAE -2107 I H l S T O R I C A I Clienr Projerr Number. 1074.92 INFORMATION _j GATHF RF Rs .I NC Approximate Scale 1;6000(1"-500') iti f Fi" fix. 7,;, V44 r ?•�! IL ' A, IL r - fir;'." �"'. y'• 1, ;. �' 1!... ► - ►. '+ r • Nl� Boulder Bridge 197D -V Shorewood, Minnesota I I1G Project Nurnlxr: MAE.2107 li Client Project Nurnlier: 1074.92 H I S T O R I C A I iNFORMATI ON _\ LATHERER5 -INC- App,- Ci-,Ie Scale 1:6000[I„ °500'} - -4if .� tr ,i 4W + ,• ` .l; op do • •.r _ •� _ .mac �; = J r% A6 cT - IE 1 � 11)RIE Ai INFORMATION GATHERERS,INC Boulder Boulder Bridge Shorewood, Minnesota 1964 5Y _ H[G Project Number: MAE -2107 Client Project plumber: 1079.92 Approximate Scale 1:5000(1 " =%' -)') i � F 1 b f %W', .y x s -L •-rte � , - - ' . _ � � . - r . :TRIP s .� . �'�• `.1'.ri ,• `_ r ,.ems -. AW A r 1957 -' N�G HIG Pra Lcr Number: MAE -2107 Shorewood, Minnesota i - Client Project 1`1umber. 1074.92 H I S T U R I C A I. INFQRAiATIOPJ `} G ATN ERE RS.[lVC. A17I7yoximare Sale 1:6000 {1 "° 500'} Boulder Bridge ^HIG^ Minnesota i - Client Project 1`1umber. 1074.92 H I S T U R I C A I. INFQRAiATIOPJ `} G ATN ERE RS.[lVC. A17I7yoximare Sale 1:6000 {1 "° 500'} or ` ' r Ar No- r :. 4- f f � fit• •Y� ♦+ _ ��_ '�� M is ,,� � � �llflll: � • WA - -_- -' Boulder Bridge 1953 �H Lr 11IG Project Number: MAE -2107 (W Shorewood, Minnesota Client Project Number: 1074 -92 H I' I0RICAL INFORMATION GATHERER 5" NC, Appr0ximatC Sci,le 1:60000"°500') are. aim F1.1 — ;,_0_. - .- H1G Boulder Bridge 1940 -v Sborewood, Minnesota HIG Project Number: MAE2107 IW - Client Projecr Number: 1074 -92 H 1 5 T p R I C A l INFOR MAT I0N .j CATH FRt R5.T NC Approximate Scale 1:6000(1 " -55000 -.lo �* IF PAL } 1937 HIG Boulder Bridge Shorewood, Minnesota HIG Project Number: MAE -2107 �I H I S T O R 1 C A I Client Project Number, 1074 -92 IPIFORMAT1ON GATH ER E IC5.I NC Approximate Scale 1:6000(1 " -50 ,)