Revised. Feasibility Report

Transcription

1 Revised Feasibility Report for 2016 Street,, Utility and Retaining Wall Improvements Bartlett Boulevard Tuxedo Boulevard Cypress Lane/Maywood Road City of Mound, Minnesota Prepared by: Bolton & Menk, Inc Shadow Lane, Suite 200 Chaska, MN October 21, 2015 (Revised November 17, 2015) (2 ND Revision January 26, 2016)

2 January 26, 2016 Honorable Mayor and Members of the City Council City of Mound 2415 Wilshire Boulevard Mound, MN RE: 2016 Street, Utility, and Retaining Wall Improvements Bartlett Boulevard: City Project No. PW Tuxedo Boulevard, Phase II: City Project No. PW Cypress Lane/Maywood Road: City Project No. PW Honorable Mayor and City Council Members: As requested, we have prepared a Revised Feasibility Report for the improvements of various City streets, utilities and retaining walls. These revisions include changes to Tuxedo Boulevard to widen narrow sidewalk, replace an existing wall and extend watermain from Stirling Road to Lamberton Road. Sincerely, BOLTON & MENK, INC. Daniel L. Faulkner, P.E. City Engineer DF/bds

3 Feasibility Report for 2016 Street, Utility and Retaining Wall Improvements City of Mound, Minnesota 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. Daniel L. Faulkner Date: January 26, 2016 Registration No

4 TABLE OF CONTENTS I. FORWA:... 1 II. CONCLUSIONS AND RECOMMENDATIONS:... 2 III. INTRODUCTION:... 5 IV. LOCATION:... 5 V. EXISTING CONDITIONS:... 6 VI. MUNICIPAL STATE AID:... 7 VII. IMPROVEMENTS:... 7 VIII. EASEMENTS:... 9 IX. ENGINEER S ESTIMATES: X. PROJECT FINANCING: XI. TYPICAL ASSESSMENT: XII. PROJECT SCHEDULE: APPENDIX A Cost Estimates/Estimated Assessments APPENDIX B Proposed Improvements

5 I. FORWA: This study has been prepared to evaluate the feasibility of the proposed 2016 Street Reconstruction Project consisting of Bartlett Boulevard, Tuxedo Boulevard, Cypress Lane/Maywood Road. The Street Reconstruction Program was established to rate the condition of existing streets in order to establish a plan that would minimize long term roadway replacement costs and preserve the integrity of the City s infrastructure through routine maintenance. The preparation of this report reviews the feasibility of cost effectively meeting the maintenance and preservation goals of the City of Mound for the 2016 portion of the Reconstruction Program. Various criteria are used to evaluate each roadway section and existing infrastructure to determine the recommended construction required. The criteria used for rehabilitation work includes but is not limited to the following general evaluation considerations: A. Areas that have been the subject of resident concerns or complaints are reviewed for the feasibility of repairing the problem. B. Excessive pavement cracking and locations of total pavement failure (potholes, settlements, etc.), which signify subgrade failure and an increased rate of deterioration. C. Cracked, broken, settled or heaved curb and gutter are noted for replacement to prevent drainage into the subgrade that promotes more extensive deterioration of the pavement. D. Areas experiencing poor drainage are evaluated to see if pavement and curb drainage patterns can be modified to correct the drainage issues or if storm sewer modifications are required. E. Sanitary sewer lines are televised and structures are inspected and evaluated to determine if routine maintenance, rehabilitation or replacement is necessary. Additional consideration is given to locations of sanitary sewer that are experiencing high levels of inflow and infiltration (I&I) that lead to increased sewer costs for the City of Mound. Locations that necessitate maintenance are reviewed for repair options. F. Storm sewer lines are jetted and televised and structures are inspected and evaluated to determine if routine maintenance, rehabilitation or replacement is necessary. Locations that necessitate maintenance are reviewed for repair options. G. The location and frequency of watermain breaks and repairs are investigated to determine if replacement is necessary to eliminate sudden water disruptions and avoid roadway patches and damage associated with the repairs. After the above evaluation has been completed, the following general practices are followed for the street improvements: A. Roadways subject to watermain or storm sewer replacement are specified for reconstruction as the trenching operation required for this work would generally remove a majority of the roadway. Bolton & Menk, Inc. 2016, All Rights Reserved C , C , C Page 1 January 26, 2016

6 B. Roadways that have significant cracking, pavement failures, or subgrade failures observed by roadway heaving and settlements as described above are designated for reconstruction. The findings from the above evaluations were used in determining the feasibility for the 2016 Street Improvement Project. The following recommendations meet the goals of the Street Rehabilitation Program by preserving and maintaining the infrastructure of the City of Mound in a cost effective manner. II. CONCLUSIONS AND RECOMMENDATIONS: Conclusions drawn from studies and investigations are: A. The proposed street, utility, and retaining wall improvements are feasible from an engineering standpoint. B. If the recommended replacement of watermain is not completed, the potential for watermain breaks under newly improved streets will continue to increase. C. If the recommended streets are not reconstructed at this time, significant maintenance work will be required particularly in areas that have settlement, significant cracking, and poor drainage. D. Temporary construction easements and/or additional permanent right-of-way may be required in areas where retaining walls are being repaired or utility replacement is near the right of way. Based on these conclusions we recommend: A. The proposed project be constructed at an estimated total cost of $4,236,000. Table 1 provides a breakdown of estimated costs for each project. Bolton & Menk, Inc. 2016, All Rights Reserved C , C , C Page 2 January 26, 2016

7 Table 1: Estimated Project Costs STREET BARTLETT BOULEVA TUXEDO BOULEVA PHASE II CYPRESS/ MAYWOOD TOTAL PROJECT COSTS STREET COST (STD. SECTION) $472,000 $357,000 $116,000 $945,000 SIDEWALK COST $57,000 $80,000 $137,000 STREET COST (EXTRA SECTION) $224,000 $227,000 $146,000 $597,000 STREET COST (UTILITY) $556,000 $180,000 $199,000 $935,000 WATERMAIN COST $664,000 $184,000 $163,000 $1,011,000 SANITARY SEWER COST $50,000 $57,000 $12,000 $119,000 STORM SEWER COST $221,000 $77,000 $104,000 $402,000 RETAINING WALL COST $8,000 $82,000 $90,000 TOTAL $2,195,000 $1,221,000 $820,000 $4,236,000 B. Bartlett Boulevard Area: 1. The proposed street improvements be constructed at an estimated total street cost of $1,252,000. a. $556,000 of the street reconstruction costs are directly associated with the construction of the various utilities. b. $224,000 of the street reconstruction cost is attributed to extra section depth and extra width above and beyond the standard 28-foot city street. c. The total estimated assessable street cost (the street area outside of the utility trenches and the extra section depth and width portion) is $472, The utilities including watermain, sanitary sewer and storm sewer improvements be constructed at an estimated total project cost of $935,000 (excluding the associated street costs). 3. Existing retaining walls be repaired at an estimated total project cost of $8,000. Bolton & Menk, Inc. 2016, All Rights Reserved C , C , C Page 3 January 26, 2016

8 C. Tuxedo Boulevard, Phase II Area: 1. The proposed street improvements be constructed at an estimated total street cost of $821,000. a. $180,000 of the street reconstruction costs are directly associated with the construction of the various utilities. b. $227,000 of the street reconstruction cost is attributed to extra section depth and extra width above and beyond the standard 28-foot city street. c. The total estimated assessable street cost, including sidewalk cost (the street area outside of the utility trenches and the extra section depth and width portion) is $414, The utilities including watermain, sanitary sewer and storm sewer improvements be constructed at an estimated total project cost of $318,000 (excluding the associated street costs). 3. Existing retaining walls be repaired at an estimated total project cost of $82,000. D. Cypress Lane/Maywood Road Area: 1. The proposed street improvements be constructed at an estimated total street cost of $541,000. a. $199,000 of the street reconstruction costs are directly associated with the construction of the various utilities. b. $146,000 of the street reconstruction cost is attributed to extra section depth and extra width above and beyond the standard 28-foot city street. c. The total estimated assessable street cost, including sidewalk cost (the street area outside of the utility trenches and the extra section depth and width portion) is $196, The utilities including watermain, sanitary sewer and storm sewer improvements be constructed at an estimated total project cost of $279,000 (excluding the associated street costs). E. The project be assessed in accordance with the City s Street Construction and Reconstruction Policy (2/3 of the assessable street cost is assessed to the benefiting property owners). Set a cap of $6,600 for one Equivalent Residential Unit. Bolton & Menk, Inc. 2016, All Rights Reserved C , C , C Page 4 January 26, 2016

9 III. IV. INTRODUCTION: On September 8, 2015, the Mound City Council ordered the preparation of an engineering Feasibility Report for the proposed 2016 Street Improvement Project. The purpose of this report is to determine in a preliminary manner, the feasibility of reconstructing existing streets within the proposed project area, reconstructing or repairing existing retaining walls within the project area as necessary, and improving utility infrastructure in coordination with the street improvement project. This project is included in the city s capital improvement plan and scheduled for 2016 construction. LOCATION: City of Mound staff along with Bolton & Menk performed a preliminary area wide evaluation of the existing streets and retaining walls in the areas proposed for improvements in the 2016 construction season. The method of proposed street improvement is determined from the existing pavement condition and location of proposed utility improvements. Typically, streets with poor pavement condition or underlying utilities scheduled for improvement are reconstructed from curb to curb. Streets with sufficient aggregate base, without underlying utilities scheduled for repair and not in need of full reconstruction may be treated with a pavement rehabilitation consisting of reclaiming and paving or mill and overlay. There is watermain construction proposed for the full length of two of the project areas (Bartlett Boulevard and Cypress/Maywood) and many gate valve replacements for the other project area (Tuxedo Boulevard. Therefore, complete reconstruction of the bituminous street and spot repair of the curb and gutter was considered for this report. The retaining walls that are in poor condition will be repaired as part of this project. The following summarizes the street and utilities proposed as part of the 2016 Street Improvement Project. 1. Street Reconstruction Tuxedo Boulevard Clyde Road to Wilshire Boulevard Bartlett Boulevard Wilshire Boulevard to Shoreline Drive Cypress Lane Maywood Road to Shoreline Drive Maywood Road West end to Wilshire Boulevard 2. Sidewalk 3. Watermain Tuxedo Boulevard Spot repairs on west side of road Cypress Lane Spot repairs on west side of road Full replacement on east side of road Maywood Road Spot repairs on south side of road Full replacement on north side of road Tuxedo Boulevard Stirling Road to Radnor Road Bartlett Boulevard Wilshire Boulevard to Shoreline Drive Bolton & Menk, Inc. 2016, All Rights Reserved C , C , C Page 5 January 26, 2016

10 Cypress Lane Maywood Road to Shoreline Drive Maywood Road West end to Wilshire Boulevard 4. Sanitary Sewer/Forcemain Bartlett Boulevard Lift Station E2 to Fernside Lane The parking area on Maywood Road, west of Cypress Lane will further be evaluated for different parking options in final design. Location maps for all proposed improvements are in Appendix B of this report. V. EXISTING CONDITIONS: The existing sub-grade soils around this area of the city are typically clayey loams with moderate to high susceptibility to freeze-thaw and shrink-swell. The existing street and storm sewer were constructed in the late 1970s with the street widths ranging from 33.3 feet to 45 feet, from back-of-curb to back-of-curb. Geotechnical evaluation reveals the existing street sections vary from three to eight inches of bituminous pavement with zero to 18 inches of aggregate base. The streets were also typically constructed with curb and gutter. Because all the streets in the project areas are designated as Municipal State Aid (MSA) routes, we performed a review of the geometry, analyzing both horizontal and vertical curves for compliance with MSA construction standards. This review indicates that Tuxedo Boulevard is deficient in both horizontal and vertical curve geometry for a 30 mph street. Bartlett Boulevard, Cypress Lane and Maywood Road all meet 30 mph geometry. Figures showing the review of roadway curves/geometry are located in Figure No. 2 in Appendix B. Several of the existing retaining walls adjacent to the project are constructed of a natural limestone flagstone. Walls that have failing portions, large cracks, are unsightly, leaning or have excessive vegetation growth between the stones will be repaired or replaced as part of the street project. A majority of the watermain and sanitary sewer were constructed in the 1960s, with the sanitary sewer consisting primarily of vitrified clay pipe and the watermain consisting of cast iron pipe. The watermain in the Tuxedo Boulevard project area has experienced very few breaks and has required only minimal maintenance as it has aged. The watermain along Bartlett Boulevard, Cypress Lane and Maywood Road has had many breaks and not fared well with age, therefore, these mains will be replaced. Part of the replacement will include upsizing the main along Bartlett Boulevard in order to complete planned water system upgrades for the island park area of the City. The sanitary sewer mains in the project area have been televised by city staff to determine if there are any segments that require complete replacement. None of the existing mains require complete replacement. The sewer mains that are not being replaced as part of this project will continue to be televised and monitored for both structural deficiency and potential sources of Inflow and infiltration I&I. These problems can be corrected at a later date if necessary by means of installing a cured in place pipe (CIPP) lining in the existing sanitary sewer. Bolton & Menk, Inc. 2016, All Rights Reserved C , C , C Page 6 January 26, 2016

11 VI. VII. MUNICIPAL STATE AID: As is previously mentioned, all streets in the project area are designated as Municipal State Aid (MSA) routes and are therefore eligible to utilize monies from the city s MSA fund balance for reconstruction. A review of the roadway curves and geometry show Bartlett Boulevard, Cypress Lane and Maywood Road meet current design standards for MSA roads, but a number of curves on Tuxedo Boulevard, both horizontal and vertical, do not meet these standards. Due to the City s annual allotment of MSA construction funds, approximately $300,000 per year, it is not necessary to utilize MSA funds on reconstructing all of its designated MSA streets. The City will be able to meet the design standards on other future MSA street projects and utilize its MSA fund balance for several years. We are therefore only recommending the Bartlett Boulevard and Cypress/Maywood streets as MSA projects and not Tuxedo Boulevard. IMPROVEMENTS: A. Streets: B. Watermain: The proposed reconstruction will include the removal of all existing bituminous and excavating to the sub-grade along with the removal and replacement of curb and gutter where required. The sub-grade under the streets will be corrected if needed and the street will be rebuilt with a layer of geo-textile fabric, 10-inches of class 5 aggregate base and 3½-inches of bituminous pavement. Tuxedo Boulevard will require 13-inches of class 5 aggregate base due to higher traffic volume. This deviates from the City s standard section of 8-inches of Class 5 aggregate base, and 3½- inches of bituminous pavement. These sections are necessary to meet a 9-ton standard, so that the roadway will support the projected traffic levels as well as following MSA pavement design standards. The concrete curb and gutter will be replaced as needed to accommodate the utility construction, but much of it is in good shape and will remain in place. Concrete driveway aprons will also be added where none currently exist and will be replaced where necessary due to grade changes or utility, drainage and retaining wall improvements. The additional street section required above the City s Standard Street Section (more than the 8-inches of aggregate base and 3½-inches of bituminous) and additional street width (anything over the City standard of 28-feet from back-of-curb to back-of-curb) is a City cost with the City s MSA fund balance being one source of funding. The locations of the street improvements are shown on the attached Figure No. 2 in Appendix B. The locations of sidewalk improvements are shown on the attached Figure No. 7 in Appendix B. All the watermain on Bartlett Boulevard, Cypress Lane and Maywood Road is proposed to be replaced and new main added on Bartlett Bolton & Menk, Inc. 2016, All Rights Reserved C , C , C Page 7 January 26, 2016

12 C. Sanitary Sewer: D. Storm Sewer: Boulevard between Fairview Lane and Avon Lane. Additionally, approximately 600 feet of 6-inch main is proposed to be added on Tuxedo Boulevard to loop Radnor Road and Lamberton Road and loop main that currently terminates at Stirling Road. The existing pipe is cast iron pipe (CIP) with a 6-inch diameter and will be replaced with 6-inch and 16-inch pipe. To increase available flow in the island area, the portion of watermain on Bartlett Boulevard between Wilshire Boulevard and Fairview Lane will be upsized from 6-inch to 16-inch watermain. There is approximately 4,970 feet of watermain proposed for replacement. All hydrants and valves will also be replaced. All watermain improvements are proposed to be financed by the City s Water Utility Fund and are not included in the street assessment. The locations of the watermain improvements are shown on the attached Figure No. 3 in Appendix B. Approximately 110 feet of sanitary forcemain along Bartlett Boulevard from Lift Station E2 to Fernside Lane will be removed and replaced as part of this project due to the extremely poor condition of the main in this area. The sanitary sewer mains are susceptible to I/I, but are structurally sound enough to support cured in place plastic (CIPP) lining and will be completed as part of a separate project. The sanitary sewer improvements are proposed to be financed by the City s Sewer Utility Fund and are not included in the street assessment. The locations of the sanitary sewer and forcemain improvements are shown on the attached Figure No. 4 in Appendix B. In several locations throughout the project existing pipe sizes may be increased and additional inlets may be added to help drain low spots and overloaded areas. All existing inlet castings in the project areas will be upgraded with high velocity grates and all the catch basins will also be reconstructed to accommodate the new grates. In addition, we will evaluate the possibility of adding storm water quality improvements wherever feasible and pursue a Minnehaha Creek Watershed District cost sharing grant. All storm sewer construction is proposed to be financed by the City s Storm Water Utility Fund and is not included in the street assessments. The locations of the storm sewer improvements are shown on the attached Figure No. 5 in Appendix B. Bolton & Menk, Inc. 2016, All Rights Reserved C , C , C Page 8 January 26, 2016

13 E. Retaining Wall Replacement: Retaining walls adjacent to streets included in the 2016 Street Improvement Project will be reconstructed as needed to accommodate utility construction and those in poor condition will be repaired or reconstructed as necessary. Wall replacement and evaluation criteria include: the extent of failing wall area; the number of large cracks; and excessive vegetative growth between stones. Most of the existing walls are made of limestone and flagstone. No new walls are currently proposed, however existing walls on Tuxedo south of Manchester Road will be replaced. They will be constructed of modular block in accordance with current City standards and are proposed to be funded by the Retaining Wall Reconstruction Fund and are not included in the street assessments. The locations of the retaining wall improvements are shown on the attached Figure No. 6 in Appendix B. VIII. EASEMENTS: Easements may be required in locations where there are significant repairs to the street section and where utilities scheduled for replacement are close to the existing right of way. The exact locations of the right-of-way and any easements needed will be determined during final design. Easement costs are not included in the 2016 Street Improvement Project estimates. Bolton & Menk, Inc. 2016, All Rights Reserved C , C , C Page 9 January 26, 2016

14 IX. ENGINEER S ESTIMATES: The costs associated with the 2016 Street, Utility and Retaining Wall Improvement Project are outlined below. Cost estimates and maps for the project area are included in appendices of this report. Bartlett Boulevard Area: Total Estimated Assessable Street Cost: $472,000 Total Estimated Extra Depth and Width Street Costs: $224,000 Total Estimated Utility Street Cost: $556,000 Total Estimated Watermain Cost: $664,000 Total Estimated Sanitary Sewer Cost: $50,000 Total Estimated Storm Sewer: $221,000 Total Estimated Retaining Wall Cost: $8,000 Total Estimated Improvement Project Cost: $2,195,000 Tuxedo Boulevard, Phase II Area: Total Estimated Assessable Street Cost: $414,000 Total Estimated Extra Depth and Width Street Costs: $227,000 Total Estimated Utility Street Cost: $180,000 Total Estimated Watermain Cost: $184,000 Total Estimated Sanitary Sewer Cost: $57,000 Total Estimated Storm Sewer: $77,000 Total Estimated Retaining Wall Cost: $82,000 Total Estimated Improvement Project Cost: $1,221,000 Cypress Lane/Maywood Road Area: Total Estimated Assessable Street Cost: $196,000 Total Estimated Extra Depth and Width Street Costs: $146,000 Total Estimated Utility Street Cost: $199,000 Total Estimated Watermain Cost: $163,000 Total Estimated Sanitary Sewer Cost: $12,000 Total Estimated Storm Sewer: $104,000 Total Estimated Improvement Project Cost: $820,000 All the above project costs include 25% indirect costs for engineering, financing, administration, etc. and 5% construction contingency costs. The street costs are split into the assessable portion of the street cost and the non-assessable portion of the street cost. These above stated estimates do not include the costs for any easements that may be required for construction. Bolton & Menk, Inc. 2016, All Rights Reserved C , C , C Page 10 January 26, 2016

15 X. PROJECT FINANCING: The street project will be assessed according to the City s Street Construction and Reconstruction Policy. This policy states that two-thirds (2/3) of the assessable street costs for the project will be assessed to benefiting properties and the remaining one-third (1/3) shall be paid by the City. The assessable street costs include the street areas outside the utility trench areas and the sidewalk. The assessable costs do not include the costs for the extra width and depth above and beyond a standard 28-foot city street. Street reconstruction costs directly associated with the utility construction have been deducted and will be paid from the special levy instead of utility revenues based on the direction received at the October 21, 2015 Special Meeting workshop. Public improvement bonds will finance all project elements with the associated street assessments levied over a period of time, which will be determined by the City Council (typically a 15 year period). Any adjustments in assessment amounts made by the City Council will be financed by the City s annual general levy. All streets in the 2016 project area are also eligible for MSA funding (excluding Maywood Road west of Cypress Lane) since these are City designated and State approved MSA routes. The City is allowed to designate a maximum of twenty (20) percent of its local street mileage as MSA routes, in accordance with State Aid Rules. These routes then generate needs which translates into MSA funds, along with Mound s proportionate population to all other MSA cities, and these funds are then placed in the City MSA account. The City can request funds from their available MSA account to pay for any portion of the eligible street costs, regardless of any amount assessed. It is recommended that City MSA funds be used to pay the non-assessed portion of the street costs. Any remaining non-msa eligible project costs would be included in the public improvement bonds, and paid through the general levy. Bartlett Boulevard Area*: Amount Assessed to Benefiting Properties (2/3) = $314,500 Amount Paid by the City (1/3) = $157,500 Total Estimated Assessable Street Costs = $472,000 *Does not include Extra Section Cost of $224,000 paid by the City and recovered with MSA Funding Retaining Wall Reconstruction: Amount Paid from Retaining Wall Reconstruction Fund = $8,000 Utility Improvements: Amount Paid from respective Utility Funds = $935,000 Associated Street Costs Paid by the City = $556,000 Estimated Total Project Costs = $1,971,000 Bolton & Menk, Inc. 2016, All Rights Reserved C , C , C Page 11 January 26, 2016

16 Tuxedo Boulevard, Phase II Area*: Amount Assessed to Benefiting Properties (2/3) = $276,000 Amount Paid by the City (1/3) = $138,000 Total Estimated Assessable Street Costs = $414,000 *Does not include Extra Section Cost of $227,000 paid by the City and recovered with MSA Funding from other streets Retaining Wall Reconstruction: Amount Paid from Retaining Wall Reconstruction Fund = $82,000 Utility Improvements (including associated street costs): Amount Paid from respective Utility Funds = $318,000 Associated Street Costs Paid by the City = $180,000 Estimated Total Project Costs = $994,000 Cypress/Maywood Area*: Amount Assessed to Benefiting Properties (2/3) = $130,500 Amount Paid by the City (1/3) = $65,500 Total Estimated Assessable Street Costs = $196,000 *Does not include Extra Section Cost of $146,000 paid by the City and recovered with MSA Funding Utility Improvements (including associated street costs): Amount Paid from respective Utility Funds = $279,000 Associated Street Costs Paid by the City = $199,000 Estimated Total Project Costs = $674,000 Bolton & Menk, Inc. 2016, All Rights Reserved C , C , C Page 12 January 26, 2016

17 XI. TYPICAL ASSESSMENT: The assessments for commercial lots will be determined by the Combination Method and assessments for residential lots will be determined by the Unit Method as described in the City of Mound s Street Construction and Reconstruction Policies. Multifamily homes with more than two dwelling units will be assessed three-quarters (3/4) of a typical assessment per unit. Corner lots with multiple City streets that only have improvements on one or two sides of the lot will only be charged one-half (1/2), one-third (1/3), or twothirds (2/3) of a typical assessment depending on how many streets the lot fronts. Also, new concrete driveway aprons are to be fully assessed to the individual benefiting property, if there is not an existing standard concrete apron. The total amount assessed to the benefiting properties will also be reduced by the Utility Street Cost. The Utility Street Cost is determined by estimating the cost of repairing a street back to the standard city section due to the utility replacement if the street was not to be fully reconstructed for this project. The Street Utility Cost will be paid from the special levy instead of the utility fund revenues and is not included in the assessable street cost calculation. ALTERNATE ASSESSMENT METHOD SET MAXIMUM EQUIVALENT RESIDENTIAL UNIT AMOUNT AT $6,600 The City has completed eleven street and utility reconstruction projects and the 2015 project is currently underway. In order to continue to assess on a comparable worth basis as established through previous projects and assess no more than the special benefit, it is recommended that the maximum amount for one Equivalent Residential Unit (ERU) be set at $6,600 for all three project areas. In addition, a comparative worth analysis has been completed and the special benefit to the commercial properties within the three project areas has been considered and no adjustment is recommended. Bartlett Boulevard Area: The commercial portion of the assessment amount will be distributed between the eight (8) commercial properties according to the Combination Method, as specified in the City s Street Construction and Reconstruction Assessment Policies. The assessable project cost for the commercial area is the proportional amount of the total assessable street improvement costs as follows: Total Street Cost Assessed to Benefitting Property Owners: $314,350 Total Length of all Streets Improved: 3,265 LF Cost Per Lineal Foot of Streets Improved: $96.28 Cost Per Frontage Foot ($96.28/2): $48.14 Total Commercial Front Footage: LF Approximate Commercial Assessment: $56,165 ($48.14 x LF) In accordance with industry accepted standard practice, and the Metropolitan Council Environmental Services Sewer Availability Charge Manual, Shirley Hills School is being considered a commercial property for the purposes of assessments and is calculated as such. The total assessable commercial project cost is then divided between the eight commercial properties based on each parcels front footage, area, and number of commercial properties as itemized on Table 3 in Appendix A. Bolton & Menk, Inc. 2016, All Rights Reserved C , C , C Page 13 January 26, 2016

18 The remaining assessable street costs will be distributed among the benefitting residential properties by the Unit Method. Using the above methods to determine the assessment breakdown, this project area includes a total of equivalent residential units (ERUs). The assessable portion divided by the number of ERUs determines the assessment as follows: Total Amount to be Assessed (2/3) = $314,350 Amount Assessed to Commercial Units = $56,165 Amount Assessed to Residential Units = $258,1 Total Benefiting ERUs = Estimated Per Unit Assessment = $258,1 / = $7,307 Alternate Maximum Per Unit Assessment = $6,600 Tuxedo Boulevard, Phase II Area: The commercial portion of the assessment amount will be distributed between the two (2) commercial properties according to the Combination Method, as specified in the City s Street Construction and Reconstruction Assessment Policies. The assessable project cost for the commercial area is the proportional amount of the total assessable street improvement costs as follows: Total Street Cost Assessed to Benefitting Property Owners: $275,900 Total Length of all Streets Improved: 2,810 LF Cost Per Lineal Foot of Streets Improved: $98.18 Cost Per Frontage Foot ($98.18/2): $49.09 Total Commercial Front Footage: 461 LF Approximate Commercial Assessment: $22,650 ($49.09 x 461 LF) The total assessable commercial project cost is then divided between the two commercial properties based on each parcels front footage, area, and number of commercial properties as itemized on Table 5 in Appendix A. The remaining assessable street costs will be distributed among the benefitting residential properties by the Unit Method with the exception of the Lakewinds Condominiums, a 189 unit condominium complex. Typically, large apartment complexes have been assessed based on the area assessment method. This would have created a disproportionately large assessment for this complex, which has street frontage on Tuxedo, but no entrances. Therefore, Lakewinds will be assessed three units based on dividing the frontage on Tuxedo by the number of residential lots that could abut Tuxedo based on 60-foot lot widths. One hundred seventy-three feet abuts Tuxedo, as a result Lakewinds will be assessed three equivalent residential units (ERUs). Each unit will then be assessed.0159 of an ERU or approximately one-sixty-third (1/63) ERU per unit ($122/unit). The assessment breakdown of this project area includes a total of equivalent residential units (ERUs). The assessable portion divided by the number of ERUs determines the assessment as follows: Bolton & Menk, Inc. 2016, All Rights Reserved C , C , C Page 14 January 26, 2016

19 Total Amount to be Assessed (2/3) = $275,900 Amount Assessed to Commercial Units = $22,650 Amount Assessed to Residential Units = $253,250 Total Benefiting ERUs = Estimated Per Unit Assessment = $253,250 / = $7,674 Alternate Maximum Per Unit Assessment = $6,600 Cypress Lane/Maywood Road Area: The commercial portion of the assessment amount will be distributed between the seven (7) commercial properties according to the Combination Method, as specified in the City s Street Construction and Reconstruction Assessment Policies. The assessable project cost for the commercial area is the proportional amount of the total assessable street improvement costs as follows: Total Street Cost Assessed to Benefitting Property Owners: $130,400 Total Length of all Streets Improved: 1,100 LF Cost Per Lineal Foot of Streets Improved: $ Cost Per Frontage Foot ($118.57/2): $59.28 Total Commercial Front Footage: LF Approximate Commercial Assessment: $111,400 ($59.28 x LF) The total assessable commercial project cost is then divided between the two commercial properties based on each parcels front footage, area, and number of commercial properties as itemized on Table 7 in Appendix A. The remaining assessable street costs will be distributed among the benefitting residential properties by the Unit Method. With the exception of the Royal Apartments, a 17 unit apartment complex, which will be assessed according to the area assessment method used for the Grandview Terrace Apartments in 2015, Seahorse Condominiums in 2014, and Indian Knoll Manor in The preponderance of residential zoning near the Cypress/Maywood project area is 10,000 square feet for a single-family dwelling. Therefore, the Royal Apartments parcel, with a total area of 18,000 square feet, fronting two streets within the project, would receive 1.80 ERU s which would be spread over the 17 residential units or approximately one-tenth (1/10) ERU per unit ($719/unit). Using the above methods to determine the assessment breakdown, this project includes a total of 2.80 equivalent residential units (ERUs). The assessable portion divided by the number of ERUs determines the assessment as follows: Total Amount to be Assessed (2/3) = $130,400 Amount Assessed to Commercial Units = $111,400 Amount Assessed to Residential Units = $19,000 Total Benefiting ERUs = 2.80 Estimated Per Unit Assessment = $19,000/ 2.80 = $6,786 Alternate Maximum Per Unit Assessment = $6,600 Bolton & Menk, Inc. 2016, All Rights Reserved C , C , C Page 15 January 26, 2016

20 XII. PROJECT SCHEDULE: October 27, 2015 November 24, 2015 February 2016 March 2016 April 2016 June 2016 October 2016 June 2017 Summer/Fall 2017 Council receives Feasibility Report and schedules the Public Improvement Hearing Council holds Public Improvement Hearing and orders Project Plans and Specifications Council approves Final Plans and sets Bid Date Bids are opened Council Awards Contract Construction Begins Substantial Completion of Project Final Completion of Project Council holds Assessment Hearing Bolton & Menk, Inc. 2016, All Rights Reserved C , C , C Page 16 January 26, 2016

21 Appendix A

22 Feasibility Report 2016 Street, Utility and Retaining Wall Improvements City of Mound Table 2: ENGINEER'S ESTIMATE - BARTLETT BOULEVA STREET COST (CITY) SUBTOTAL CONSTRUCTION $362, ENGINEERING, LEGAL & ADMIN (25%) $90, CONSTRUCTION CONTINGENCY (5%) $18, TOTAL ESTIMATED STREET COST $471, STREET COST (UTILITY) TOTAL UTILITY ASSOCIATED COST $428, ENGINEERING, LEGAL & ADMIN (25%) $107, CONSTRUCTION CONTINGENCY (5%) $21, TOTAL ESTIMATED STREET COST $556, STREET COST (EXTRA SECTION) SUBTOTAL CONSTRUCTION $172, ENGINEERING, LEGAL & ADMIN (25%) $43, CONSTRUCTION CONTINGENCY (5%) $8, TOTAL ESTIMATED STREET COST $223, WATERMAIN COST SUBTOTAL CONSTRUCTION $510, ENGINEERING, LEGAL & ADMIN (25%) $127, CONSTRUCTION CONTINGENCY (5%) $25, TOTAL ESTIMATED WATERMAIN COST $663, SANITARY SEWER COST SUBTOTAL CONSTRUCTION $38, ENGINEERING, LEGAL & ADMIN (25%) $9, CONSTRUCTION CONTINGENCY (5%) $1, TOTAL ESTIMATED SEWER COST $50, STORM SEWER COST SUBTOTAL CONSTRUCTION $169, ENGINEERING, LEGAL & ADMIN (25%) $42, CONSTRUCTION CONTINGENCY (5%) $8, TOTAL ESTIMATED STORM SEWER COST $220, RETAINING WALL COST SUBTOTAL CONSTRUCTION $5,9.00 ENGINEERING, LEGAL & ADMIN (25%) $1, CONSTRUCTION CONTINGENCY (5%) $ TOTAL ESTIMATED RETAINING WALL COST $7, TOTAL PROJECT COST: $2,194, Bolton Menk, Inc All Rights Reserved C November 17, 2015

23 Feasibility Study 2016 Street, Utility and Retaining Wall Improvements City of Mound Table 3: ESTIMATED ASSESSMENTS - BARTLETT BOULEVA ASSESSMENT-COMMERCIAL NUMBER OF COMMERCIAL UNITS= 8 ASSESSMENT BASED ON BASED ON BASE STREET LOT FRONT SQUARE ON # OF LOT FRONTAGE AREA FOOTAGE FOOTAGE UNITS TOTAL STREET NUMBER (LIN FT) (SQ FT) (30%) (30%) (40%) (100%) WILSHIRE BOULEVA ,792 $9, $14, $2, $26, BARTLETT BOULEVA ,921 $ $ $2, $3, SHORELINE DRIVE ,004 $2, $ $2, $5, SHORELINE DRIVE ,093 $ $ $2, $3, SHORELINE DRIVE ,211 $2, $ $2, $5, BARTLETT BOULEVA ,776 $1, $ $2, $4, SHORELINE DRIVE ,328 $0.00 $ $2, $3, BARTLETT BOULEVA ,762 $ $62.73 $2, $3, TOTALS ,887 $56, ESTIMATED 2016 STREET COST (ASSESSABLE PORTION) $471, ASSESSABLE PROJECT COSTS (2/3 OF ASSESSABLE STREET COSTS) $314, LENGTH OF ALL STREETS IMPROVED 3,265 COST PER LINEAL FOOT OF STREET $96.28 COST PER FRONTAGE FOOT OF STREET $48.14 ASSESSABLE PROJECT COST (TOTAL FRONTAGE x COST PER FRONTAGE FOOT) $56, ASSESSMENT-RESIDENTIAL EQUIVALENT TOTAL LOTS RES. UNITS SINGLE FAMILY UNITS RECEIVING FULL ASSESSMENT (1.0) SINGLE FAMILY UNITS RECEIVING THREE QUARTER ASSESSMENT (0.75) SINGLE FAMILY UNITS RECEIVING TWO THIS ASSESSMENT (0.67) SINGLE FAMILY UNITS RECEIVING HALF ASSESSMENT (0.50) SINGLE FAMILY UNITS RECEIVING ONE THI ASSESSMENT (0.33) CITY OWNED UNITS TOTALS ESTIMATED 2016 STREET IMPROVEMENT COST (ASSESSABLE PORTION) $471, ASSESSABLE PROJECT COSTS (2/3 OF ASSESSABLE STREETS) $314, COMMERCIAL ASSESSMENT $56, TOTAL AMOUNT ASSESSED TO RESIDENTIAL $258, ESTIMATED ASSESSMENT PER RESIDENTIAL UNIT $7, ALTERNATE: ASSESSMENT-RESIDENTIAL CAPPED MAXIMUM ASSESSMENT PER RESIDENTIAL UNIT $6, DEDUCTED ASSESSMENT PER RESIDENTIAL UNIT $ TOTAL DEDUCTION PAID BY CITY $24, Bolton Menk, Inc All Rights Reserved C November 17, 2015

24 Feasibility Report 2016 Street, Utility and Retaining Wall Improvements City of Mound Table 4: ENGINEER'S ESTIMATE - TUXEDO BOULEVA, PHASE II - REVISION 2 STREET COST (STANDA SECTION) SIDEWALK COST SUBTOTAL CONSTRUCTION $274, ENGINEERING, LEGAL & ADMIN (25%) $68, CONSTRUCTION CONTINGENCY (5%) $13, TOTAL ESTIMATED STREET COST $356, SUBTOTAL CONSTRUCTION $44, ENGINEERING, LEGAL & ADMIN (25%) $11,014. CONSTRUCTION CONTINGENCY (5%) $2, TOTAL ESTIMATED SIDEWALK COST $57, STREET COST (UTILITY) SUBTOTAL CONSTRUCTION $138, ENGINEERING, LEGAL & ADMIN (25%) $34, CONSTRUCTION CONTINGENCY (5%) $6, TOTAL ESTIMATED STREET COST $179, STREET COST (EXTRA SECTION) SUBTOTAL CONSTRUCTION $174, ENGINEERING, LEGAL & ADMIN (25%) $43, CONSTRUCTION CONTINGENCY (5%) $8, TOTAL ESTIMATED STREET COST $226, WATERMAIN COST SUBTOTAL CONSTRUCTION $142, ENGINEERING, LEGAL & ADMIN (25%) $35, CONSTRUCTION CONTINGENCY (5%) $7, TOTAL ESTIMATED WATERMAIN COST $184, SANITARY SEWER COST SUBTOTAL CONSTRUCTION $43, ENGINEERING, LEGAL & ADMIN (25%) $10, CONSTRUCTION CONTINGENCY (5%) $2, TOTAL ESTIMATED SEWER COST $56, STORM SEWER COST SUBTOTAL CONSTRUCTION $59, ENGINEERING, LEGAL & ADMIN (25%) $14, CONSTRUCTION CONTINGENCY (5%) $2, TOTAL ESTIMATED STORM SEWER COST $77, RETAINING WALL COST SUBTOTAL CONSTRUCTION $63, ENGINEERING, LEGAL & ADMIN (25%) $15, CONSTRUCTION CONTINGENCY (5%) $3, TOTAL ESTIMATED RETAINING WALL COST $81, TOTAL PROJECT COST: $1,221, Bolton Menk, Inc All Rights Reserved C January 26, 2016

25 Feasibility Study 2016 Street, Utility and Retaining Wall Improvements City of Mound Table 5: ESTIMATED ASSESSMENTS - TUXEDO BOULEVA, PHASE II - REVISION 2 ASSESSMENT-COMMERCIAL NUMBER OF COMMERCIAL UNITS= 2 ASSESSMENT BASED ON BASED ON BASE STREET LOT FRONT SQUARE ON # OF LOT FRONTAGE AREA FOOTAGE FOOTAGE UNITS TOTAL STREET NUMBER (LIN FT) (SQ FT) (30%) (30%) (40%) (100%) TUXEDO ,492 $2, $1, $4, $8, ,046 $4, $5, $4, $14, TOTALS ,538 $22,645. ESTIMATED 2016 STREET COST (ASSESSABLE PORTION) $413, ASSESSABLE PROJECT COSTS (2/3 OF ASSESSABLE STREET COSTS) $275, LENGTH OF ALL STREETS IMPROVED 2,810 COST PER LINEAL FOOT OF STREET $98.18 COST PER FRONTAGE FOOT OF STREET $49.09 ASSESSABLE PROJECT COST (TOTAL FRONTAGE x COST PER FRONTAGE FOOT) $22,645. ASSESSMENT-RESIDENTIAL EQUIVALENT TOTAL LOTS RES. UNITS SINGLE FAMILY UNITS RECEIVING FULL ASSESSMENT (1.0) SINGLE FAMILY UNITS RECEIVING THREE QUARTER ASSESSMENT (0.75) SINGLE FAMILY UNITS RECEIVING TWO THIS ASSESSMENT (0.67) SINGLE FAMILY UNITS RECEIVING HALF ASSESSMENT (0.50) SINGLE FAMILY UNITS RECEIVING ONE THI ASSESSMENT (0.33) WILSHIRE CONDOS CITY OWNED UNITS TOTALS ESTIMATED 2016 STREET IMPROVEMENT COST (ASSESSABLE PORTION) $413, ASSESSABLE PROJECT COSTS (2/3 OF ASSESSABLE STREETS) $275, COMMERCIAL ASSESSMENT $22,645. TOTAL AMOUNT ASSESSED TO RESIDENTIAL $253, ESTIMATED ASSESSMENT PER RESIDENTIAL UNIT $7, ALTERNATE: ASSESSMENT-RESIDENTIAL CAPPED MAXIMUM ASSESSMENT PER RESIDENTIAL UNIT $6, DEDUCTED ASSESSMENT PER RESIDENTIAL UNIT $1, TOTAL DEDUCTION PAID BY CITY $35, Bolton Menk, Inc All Rights Reserved C January 26, 2016

26 Feasibility Report 2016 Street, Utility and Retaining Wall Improvements City of Mound Table 6: ENGINEER'S ESTIMATE - CYPRESS/MAYWOOD STREET COST (STANDA SECTION) SIDEWALK COST SUBTOTAL CONSTRUCTION $89, ENGINEERING, LEGAL & ADMIN (25%) $22, CONSTRUCTION CONTINGENCY (5%) $4, TOTAL ESTIMATED STREET COST $115, SUBTOTAL CONSTRUCTION $61, ENGINEERING, LEGAL & ADMIN (25%) $15, CONSTRUCTION CONTINGENCY (5%) $3, TOTAL ESTIMATED SIDEWALK COST $79, STREET COST (UTILITY) SUBTOTAL CONSTRUCTION $153, ENGINEERING, LEGAL & ADMIN (25%) $38, CONSTRUCTION CONTINGENCY (5%) $7, TOTAL ESTIMATED STREET COST $199, STREET COST (EXTRA SECTION) SUBTOTAL CONSTRUCTION $112, ENGINEERING, LEGAL & ADMIN (25%) $28, CONSTRUCTION CONTINGENCY (5%) $5, TOTAL ESTIMATED STREET COST $146, WATERMAIN COST SUBTOTAL CONSTRUCTION $125, ENGINEERING, LEGAL & ADMIN (25%) $31, CONSTRUCTION CONTINGENCY (5%) $6, TOTAL ESTIMATED WATERMAIN COST $162, SANITARY SEWER COST SUBTOTAL CONSTRUCTION $9, ENGINEERING, LEGAL & ADMIN (25%) $2, CONSTRUCTION CONTINGENCY (5%) $ TOTAL ESTIMATED SEWER COST $11, STORM SEWER COST SUBTOTAL CONSTRUCTION $79, ENGINEERING, LEGAL & ADMIN (25%) $19, CONSTRUCTION CONTINGENCY (5%) $3, TOTAL ESTIMATED STORM SEWER COST $103, TOTAL PROJECT COST: $819, Bolton Menk, Inc All Rights Reserved C November 17, 2015

27 Feasibility Study 2016 Street, Utility and Retaining Wall Improvements City of Mound Table 7: ESTIMATED ASSESSMENTS - CYPRESS/MAYWOOD ASSESSMENT-COMMERCIAL NUMBER OF COMMERCIAL UNITS= 7 ASSESSMENT BASED ON BASED ON BASE STREET LOT FRONT SQUARE ON # OF LOT FRONTAGE AREA FOOTAGE FOOTAGE UNITS TOTAL STREET NUMBER (LIN FT) (SQ FT) (30%) (30%) (40%) (100%) CYPRESS NE ,881 $1, $1, $6, $9, SHORELINE DRIVE ,562 $3, $3, $6, $13, WILSHIRE BOULEVA ,200 $1, $ $6, $8, WILSHIRE BOULEVA ,000 $2, $ $6, $9, CYPRESS NE ,000 $3, $1, $6, $11, MAYWOOD ROAD (CITY) ,373 $10, $13, $6, $30, CYPRESS NE (CITY) ,799 $10, $11, $6, $28, TOTALS ,815 $111, ESTIMATED 2016 STREET COST (ASSESSABLE PORTION) $195, ASSESSABLE PROJECT COSTS (2/3 OF ASSESSABLE STREET COSTS) $130, LENGTH OF ALL STREETS IMPROVED 1,100 COST PER LINEAL FOOT OF STREET $ COST PER FRONTAGE FOOT OF STREET $59.28 ASSESSABLE PROJECT COST (TOTAL FRONTAGE x COST PER FRONTAGE FOOT) $111, ASSESSMENT-RESIDENTIAL EQUIVALENT TOTAL LOTS RES. UNITS SINGLE FAMILY UNITS RECEIVING FULL ASSESSMENT (1.0) 0.00 SINGLE FAMILY UNITS RECEIVING THREE QUARTER ASSESSMENT (0.75) 0.00 SINGLE FAMILY UNITS RECEIVING HALF ASSESSMENT (0.50) 0.00 SINGLE FAMILY UNITS RECEIVING ONE THI ASSESSMENT (0.33) 0.00 HIGH DENSITY RESIDENTIAL (5601 APARTMENTS - 17) CITY OWNED UNITS TOTALS 2.80 ESTIMATED 2016 STREET IMPROVEMENT COST (ASSESSABLE PORTION) $195, ASSESSABLE PROJECT COSTS (2/3 OF ASSESSABLE STREETS) $130, COMMERCIAL ASSESSMENT $111, TOTAL AMOUNT ASSESSED TO RESIDENTIAL $19, ESTIMATED ASSESSMENT PER RESIDENTIAL UNIT $6, ALTERNATE: ASSESSMENT-RESIDENTIAL CAPPED MAXIMUM ASSESSMENT PER RESIDENTIAL UNIT $6, DEDUCTED ASSESSMENT PER RESIDENTIAL UNIT $ TOTAL DEDUCTION PAID BY CITY $ Bolton Menk, Inc All Rights Reserved C November 17, 2015

28 Appendix B

29 DRIFTWOOD 4790 CEDAR KEWOOD NOBLE CENTERVIEW CYPRESS MAYWOOD ROAD 2521 CENTERVIEW KEWOOD BARTLETT ASHND LYNWOOD CYPRESS MAYWOOD ROAD CAINAL MAYWOOD ROAD MORTON EDEN Bolton & Menk, Inc. 2015, All Rights Reserved H:\MOUN\C \CAD\C3D\DISPY\FEASIBILITY STUDY\FIGURE 1.DWG 10/20/15 3:11 PM APPLE SHORELINE DR. MAYWOOD ROAD HIDDENVALE 5174 EMERALD DR FAIRVIEW FAIRVIEW SCALE GLENDALE CHANNEL EDGEWATER DR CHATEAU 50 BARTLETT LEGEND EMERALD DR GLENDALE PECAN WOODRIDGE ROSEDALE EDGEWATER BAYPORT HICKORY ASSESSMENT = 36 LOTS RECONSTRUCT STREET COMMERCIAL = 14 LOTS DAKOTA RAIL INC SHORELINE DR FERNSIDE BARTLETT EMERALD KE NORTHERN NORWOOD SANDY MONTCIR EDGEWATER DR SETON KE 44 LONGFO CYPRESS NE/MAYWOOD 4800 ROAD BARTLETT TUXEDO COMMERCIAL 2648CITY = 2 LOTS ASSESSMENT = 3 LOTS FULL ASSESSMENT = 44 LOTS CITY LOT = 4 LOTS HIGH DENSITY RESIDENTIAL = 17 UNITS FEET TOTAL # UNITS EQUIVALENT RESIDENTIAL UNITS 4898 # UNITS EQUIVALENT RESIDENTIAL UNITS WEXFO # UNITS CARRICK EQUIVALENT RESIDENTIAL UNITS KEWINDS CONDOS = 189 UNITS TYRONE CARLOW CUMBERND HAMPTON INVERNESS KNOX STRATFO MANKATO, MN FAIRMONT, MN SLEEPY EYE, MN BURNSVILLE, MN WILLMAR, MN CHASKA, MN RAMSEY, MN MAPLEWOOD, MN BAXTER, MN ROCHESTER, MN AMES, IA SPENCER, IA DES MOINES, IA FARGO, ND STIRLING TUXEDO CLYDE (PRIVATE) CAIGAN MANCHESTER DORCHESTER DENBIGH MONTGOMERY RADNOR MBERTON ISND VIEW DR MANCHESTER DORCHESTER CAIFF PELICAN ASSESSMENT AREA KEWINDS CONDOMINIUMS 189 UNITS 4446 PRIVATE TUXEDO CT 3048 STREET PELICAN EAST PORT POINT CIR SPRING PARK BAY KE MINNETONKA CITY OF MOUND, MINNESOTA 2016 STREET, UTILITY & RETAINING WALL IMPROVEMENTS FIGURE 1