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Home My WebLink About5.c. Receive Feasibility Report / Set Public Hearing - Section 31 Sanitary Sewer FacilitiesCITY OF ROSEMOUNT EXECUTIVE SUMMARY FOR ACTION CITY COUNCIL MEETING DATE: July 7, 1992 AGENDA ITEM:Receive Feasibility/Set Public Hrg AGENDA SECTION: Sec.31 Trunk Sanitary Sewer Facilities, #233 New Business PREPARED BY: Bud Osmundson AGENDA N A's � City Engineer/Assistant Public Works Director, 11 # 5 C 1 ATTACM1ENTS: Memo,!Resolutions, Mailing List RO BY: Public Hearing Notice, Feasibility Report -� At the June 2, 1992 regular Council meeting Council deemed it necessary to order a feasibility study for Section 31 Trunk Sanitary Sewer Facilities, City Project #233. SEH Consulting Engineer firm has supplied the City with the necessary feasibility report. The project is feasible. Dave Simons will present and explain the feasibility report. Upon acceptance of the feasibility report, 'Staff recommends setting a , public hearing for the project for July 21, 1992 starting at 8:00 p.m. or as soon thereafter as possible." RECOMMENDED ACTION: MOTION to adopt a resolution receiving the feasibility report for Section 31 Trunk Sanitary Sewer Facilities, City Project #233. MOTION to adopt a resolution cal -ling for a public hearing for Section 31 Trunk Sanitary Sewer Facilities, City Project #233. COUNCIL ACTION: 1 a CITY OF ROSEMOUNT DAKOTA COUNTY, MINNESOTA RESOLUTION 1992 - A RESOLUTION RECEIVING THE FEASIBILITY REPORT SECTION 31 TRUNK SANITARY SEWER FACILITIES CITY PROJECT #233 WHEREAS, the City Council deemed it necessary and expedient that the City of Rosemount, Minnesota, construct certain improvements, to -wit: City Project #233, Section 31 Trunk Sanitary Sewer Facilities, in the City as described in and in accordance with the feasibility report prepared by Short Elliott Hendrickson, Inc., Consulting Engineers; and WHEREAS, the City Council has been advised by the Consulting Engineers that said utility improvements, City Project #233, is feasible, and should best be made as proposed, and the Consulting Engineers' report to this effect has heretofore been received by Council, and filed with the City Clerk on July 7, 1992; and NOW THEREFORE BE IT RESOLVED, the City Council of the City of Rosemount accepts the feasibility report for City Project #233 and places it on file. ADOPTED this 7th day of July, 1992. ATTEST: Susan M. Walsh, City Clerk Motion by: Vote in favor: Vote against: 0 E. B. McMenomy, Mayor Seconded by:_ CITY OF ROSEMOUNT DAKOTA COUNTY, MINNESOTA RESOLUTION 1992 - A RESOLUTION CALLING FOR A PUBLIC HEARING SECTION 31 TRUNK SANITARY SEWER FACILITIES CITY PROJECT #233 WHEREAS, the City Council received the feasibility report and found the project feasible for Section 31 Trunk Sanitary Sewer Facilities, City Project #233, on the 7th day of July, 1992; and WHEREAS, the statute provided that no such improvements shall be made until the Council has held a public hearing on such improvements following mailed notice and two publications thereof in the official newspaper stating time and place of the hearing, the general nature of the improvement, the estimated costs thereof, and the area proposed to be assessed, in accordance with the law; and NOW THEREFORE, BE IT RESOLVED by the City Council of the City of Rosemount, Minnesota, as follows: 1. A public hearing will be held at the time and place set forth in the Notice of Hearing attached hereto as Exhibit A to consider said proposed improvements. 2. The nature of the improvements, the estimated cost of each major portion thereof, and the areas proposed to be assessed therefor are described in the form of Notice of Hearing hereto attached. 3. The notice of said public hearing shall be in substantially the form contained in the notice hereto attached. 4. The City Clerk is hereby authorized and directed to cause notice of said hearing to be given two publications in the official newspaper. Said publications shall be one week apart, and at least three days shall elapse between the last publication and the hearing. Not less than ten days before the hearing the Clerk shall mail notice of the hearing to the owner of each parcel of land within the area proposed to be assessed as described in the notice. For the purpose of giving such mailed notice, owners shall be those shown to be such on the records of the County Auditor or, if the tax statements in the County are mailed by the County Treasurer, on the records of the County Treasurer. As to properties not listed on the records of the County Auditor or the County Treasurer, the Clerk shall ascertain such ownership by any practicable means and give mailed notice to such owners. ADOPTED this 7th day of July, 1992. ATTEST: Susan M. Walsh, City Clerk Motion by: Voted in favor: Voted against: Seconded by: E. B. McMenomy, Mayor CITY OF ROSEMOUNT DAKOTA COUNTY, MINNESOTA PUBLIC NOTICE NOTICE OF PUBLIC HEARING ON IMPROVEMENTS SECTION 31 TRUNK SANITARY SEWER FACILITIES CITY PROJECT NO. 233 TO WHOM IT MAY CONCERN: NOTICE IS HEREBY GIVEN, that the City Council of the City of Rosemount, Minnesota will meet at 8:00 o'clock p.m. or as soon thereafter as possible, Tuesday, July 21, 1992, in the Council Chambers of the City Hall, 2875 145th Street West, to consider the following improvements: Project #233 - Section 31 Trunk Sanitary Sewer Facilities The nature of improvements shall include the construction of sanitary sewer facilities and restoration as required. The total estimated cost of said improvements is $426,000. The total assessment cost of said improvement is $83,000. The area proposed to be assessed for the foregoing improvements would generally be all that area generally described as Parcel Identification Number #34-03110-010- 9 1, 34-03110-01091, part of SW 1/4 of SE 1/4 of Section 31, Township 115, Range 19, Rosemount, Minnesota recorded in the office of Dakota County, Minnesota. Such person(s) as desires to be heard with reference to the proposed improvements will be heard at this meeting. Written or oral opinion will be considered. Dated this 7th day of July, 1992. BY ORDER OF THE CITY COUNCIL. 1 Susan M. Walsh City Clerk City of Rosemount Dakota County, Minnesota MAILING LIST SECTION 31, TRUNK SANITARY SEWER FACILITIES CITY PROJECT NO. 233 PUBLIC HEARING: JULY 21, 1992 8:00 P.M. Isadore J. Gergen 34-03110-010-91 24365 Cedar Lake Dr. W. Jordan, MN 55352 Preliminary Report Section 31 Trunk Sanitary Sewer Facilities in City of Rosemount Minnesota City Project No. 233 SEH File No. 92422 July 7,1992 I hereby certify that this report was prepared by me or under my direct supervision, and that I am a duly Registered Engineer under the laws of the State of Minnesota. i / July 992 Reg. No. 19574 Reviewed by: d� Date: July 7,1992 r AV ENGINEERS N ARCHITECTS BPI 3535 VADNAIS CENTER DRIVE, ST. PAUL, MN 55110-5108 612490-2000 800325-2055 July 7,1992 RE: Rosemount, Minnesota Section 31 Trunk Sanitary Sewer Facilities City Project No. 233 SEH File No. 92442 City of Rosemount 2875 -145th Street West Rosemount, Minnesota 55068 ATTN: Ron Wasmund, Director of Public Works Gentlemen: In accordance with your authorization, we have prepared the attached preliminary report for trunk sanitary sewer construction for Section 31. This report discusses trunk sanitary sewer alignments, lift station and forcemain improvements, and provides cost estimates for each. We find this improvement to be feasible and recommend that it be constructed in general compliance with the provisions of this report. We would be pleased to review this report with you in detail. DFS:llc Enclosure SHORT ELLIOTT HENDRICKSON INC. ST CLOUD, MN I Sincerely, Sho liott Hendrickson Inc. 1 David E Simons, E. CHIPPEWA FALLS, WI MADISON, WI IPart 1 - Introduction 1.1 Authorization On June 2,1992, the City of Rosemount authorized the preparation of a preliminary report for trunk sanitary sewer facilities to serve portions of Sections 31 and 32 located in southwestern Rosemount. The project has been designated as City Project No. 233. 1.2 Scope The purpose of this report is to determine the engineering requirements and feasibility of this project based on a review of the data available, and to make recommendations and provide cost estimates for the construction of a sanitary sewer lift station, forcemain and trunk gravity sewer. 1.3 Data Available Information and materials used in the preparation of this report include: A. PUD Concept Plan for Rosemount West (January 1986) B. Comprehensive Sewer Plan Update (June 7,1991) C. City of Rosemount Construction Record Drawings for Valley Oak Addition and West Ridge First Addition. D. Existing plats in Section 31. E. City of Rosemount Drainage Plan for the West Drainage Area (May 1989) F. Preliminary construction plans for the Valley Oak Pond Outlet project. G. Shannon Pond Preliminary Plat (June 1992) Section 31 Trunk Sanitary Facilities Preliminary Report Page 2 1 0 Part 2 - General Background 2.1 Project Area The project location is shown in Drawing No. 1. The gravity trunk main is located in the southeast 1/4 of Section 31. The lift station and forcemain are located in the southwest 1/4 of Section 31. The study area includes the sanitary sewer subdistricts 102,104 and 106 as identified in the Comprehensive Sewer Plan Update dated June 7,1991. These subdistricts include most of Section 31 and the west 1 /2 of Section 32. 2.2 Adjacent Property The project area is adjacent to several former or proposed City construction projects, including Phase I of the Valley Oak Addition, the Valley Oak Pond Outlet project, Shannon Parkway street and utility project, and West Ridge First Addition. Empire Township lies to the south of the project area. Currently, a large portion of the project area is being obtained by a developer. The area being obtained generally consists of the undeveloped property east of the West Ridge Additions, and the undeveloped property east of Shannon Parkway and south of the Valley Oak Addition. The preliminary name that has been given to this development is the Shannon Pond Addition. a 2.3 Site Conditions 1 The project area is currently undeveloped and used for agricultural purposes. A conceptual lot layout, completed in 1986, was utilized to determine the gravity sewer alignments. In addition, the location of existing ponding easements were considered in the determination of the alignment alternatives. The two proposed alternative alignments have been forwarded to the developer's land planner for review and comment. 2.4 Design Criteria The sanitary sewer flows were determined by completing a detailed inventory of the sanitary sewer subdistricts. The inventory included existing residential lots and developable acreage. Commercial acreage was also included. Flow calculations were obtained using the rates indicated in Table 1. Section 31 Trunk Sanitary Facilities Preliminary Report Page 3 Table 1 Sanitary Sewer Flow Rates Existing Residential Lot 274 gals/unit/day Undeveloped Residential Property 3 units/acre x 274 gals/unit/day Commercial Property (Developed or Undeveloped) 1500/gal/acre/day • 274 Gals/unit/day is a Metropolitan Waste Control Commission (MWCC) Residential Equivalent Unit (REQ. This is equal to MWCC's average household flow. • The daily average flows were peaked according to "Recommended Standards for Waste Water Facilities" (Ten State Standards) to determine the maximum flow rate. The peak flow rate factors were applied to residential flows only. 2.5 Permits The improvements proposed in this report will require review and permit approval from the following agencies: • Metropolitan Waste Control Commission for the Sanitary Sewer Comprehensive Plan amendment. • Minnesota Pollution Control Agency for the sanitary sewer extensions. • Dakota County Highway Department for installation of utilities on County right- of-way. 11 I Section 31 Trunk Sanitary Facilities Preliminary Report Page 4 n I Part 3 - Proposed Improvements 3.1 Sanitary Sewer Flow Demands/Service Area The sanitary sewer flow rates along trunk sewer alignments are shown for each subdistrict on Drawing No. 2. The proposed pipe sizes and pipe capacities are also shown on this drawing. The service area consists of subdistricts 102,104, and 106, as identified in the Comprehensive Sewer Plan Update. The land south of 160th Street was not included in the service area because there is not enough capacity in the existing 15 -inch gravity trunk located west of Danville Avenue to accept any flow from Empire Township. In addition, the Apple Valley interceptor can service much of Empire Township by gravity if capacity is made available at the Empire Treatment Plant. 3.2 Sanitary Sewer Improvements 3.2.1 Alternative Alignment "A" Proposed sanitary sewer facilities are shown on Drawings 3 and 4. The proposed gravity sanitary sewer should not only follow an alignment which suits the development of the land, but should also be an economical extension in terms of minimizing excavation depths. For these reasons, two gravity sanitary sewer alignments were studied. Drawing No. 3 shows Alignment A, which consists of a 16 -inch gravity sanitary sewer extending south from the existing sanitary sewer manhole at the Valley Oak Addition plat line. Alignment A continues straight south to approximately 200 feet north of 160th Street where it turns west and continues to Shannon Parkway. The proposed lift station is located west of Shannon Parkway on upland which is part of the proposed ponding site to be located in the northwest corner of 160th Street and Shannon Parkway. This alignment extends along a route which has the shallowest depth of excavation for the proposed facilities. Alignment A does not entirely follow the future street right-of-way as indicated in the conceptual plan layout for this area. Alignment A follows a future street right-of-way for a short distance, then continues south along a lot line and adjacent to a ponding site. Alignment A has a lower total cost, lower assessable cost, and a lower core cost than Alignment B. 3.2.2 Alternative Alignment "B" The proposed sanitary sewer for Alignment B is shown on Drawing No. 4. This 16 -inch gravity sewer alignment extends from the same point and terminates at the same point as sewer Alignment A. However, Alignment B follows the conceptual plan street layout for the undeveloped property. Section 31 Trunk Sanitary Facilities Preliminary Report Page 5 The cost of Alignment B, with its lateral sewer extensions, was compared to the cost of Alignment A and its lateral sewer extensions. Alignment B has a higher total cost, higher assessable cost, and a higher core cost than Alignment A. The cost summary is discussed in the Financing section of this report. 3.2.3 Lift Station and Forcemain The lift station site is shown on Drawing 5. The proposed lift station will be located west of Shannon Parkway and north of 160th Street. The lift station site is located on an upland portion of the future expanded ponding area which is identified as VER 209 in the Drainage Plan for the West Drainage Area. s The proposed lift station will be a duplex pumping station capable of pumping 900 gpm at a total lift of 58 feet when utilizing a 12 -inch forcemain. The duplex pumping station will have two submersible pumps approximately 30 horse power in size. A 12 -inch forcemain will extend from the proposed lift station south along Shannon Parkway to 160th Street, then west along the north side of 160th Street to the existing gravity discharge manhole at Danville Avenue. The proposed forcemain will outlet into the existing 15 -inch gravity sanitary sewer which extends west to the MWCC Apple Valley interceptor. 3.2.4 Meter Station The gravity sanitary sewer line, which extends west of the Rosemount City limits and connects to the MWCC Apple Valley interceptor, was installed as a part of West Ridge First Addition in 1986 under City Project 1986-2. The MWCC requires that all intercommunity connections be metered to Section 31 Trunk Sanitary Facilities Preliminary Report Page 6 1 The reconstruction of 160th Street by Dakota County is scheduled for 1995. According to the County, the future half right-of-way width of 160th Street will be between 50 and 60 feet. The forcemain will be located approximately 47 feet north of the centerline of 160th Street. This is the same alignment location as the existing sanitary sewer west of Danville Avenue and it would place the forcemain between 3 feet and 13 feet south of the future northerly right-of-way line. The forcemain would also be far enough from the existing FAA cable to minimize conflicts during construction. Existing lift station No. 3 will be abandoned as part of the proposed improvements. The telemetry system on the existing lift station will be salvaged and reused on the proposed improvement. All other salvageable items will be removed and delivered to the City of Rosemount. Three-phase power for running the lift station pumps and telephone service for the telemetry connection are available along Shannon Parkway. Costs for hookups to electric and telephone have been included in the cost estimates. 3.2.4 Meter Station The gravity sanitary sewer line, which extends west of the Rosemount City limits and connects to the MWCC Apple Valley interceptor, was installed as a part of West Ridge First Addition in 1986 under City Project 1986-2. The MWCC requires that all intercommunity connections be metered to Section 31 Trunk Sanitary Facilities Preliminary Report Page 6 1 3.3 Easements The proposed improvements require permanent utility easements and temporary construction easements for installation of the gravity sanitary sewer. Thirty -foot - wide utility easements centered over the pipe, along with temporary construction easements determined by the depth of construction, will be necessary. The proposed alignments have been submitted to the developer's land planning consultant for review. If possible, easements should be obtained from the parcel owner as part of a development agreement. Completion of the proposed improvements will provide sanitary sewer serviceability to the site. The proposed lift station site and forcemain alignment will also require permanent utility easements. The lift station site can be obtained in conjunction with additional land required for ponding purposes. Drawing No. 5 shows future expansion of the existing ponding area in relation to the proposed lift station location. The forcemain alignment is proposed to be along the future right-of-way required for 160th Street. A temporary construction easement along the forcemain alignment will also be �? necessary. Forcemain easements should also be obtained as part of a development agreement for the property. 1 i Section 31 Trunk Sanitary Facilities Preliminary Report Page 7 1 determine flow charges to the respective community. During the 1986-2 Improvement Project, a metering manhole was constructed, but the metering device was not installed due to the very small flows. To date, all sanitary sewer flow through this line is estimated by MWCC for sewer charges. The proposed improvements, in conjunction with the West Ridge 4th Addition Improvements, will increase the sanitary sewer flow so that meter monitoring of the flows is recommended. The MWCC will design, construct, and finance the flow monitoring device. They will also maintain and monitor the metering station. Permit applications for the proposed improvements will commence the metering project by the MWCC. 3.3 Easements The proposed improvements require permanent utility easements and temporary construction easements for installation of the gravity sanitary sewer. Thirty -foot - wide utility easements centered over the pipe, along with temporary construction easements determined by the depth of construction, will be necessary. The proposed alignments have been submitted to the developer's land planning consultant for review. If possible, easements should be obtained from the parcel owner as part of a development agreement. Completion of the proposed improvements will provide sanitary sewer serviceability to the site. The proposed lift station site and forcemain alignment will also require permanent utility easements. The lift station site can be obtained in conjunction with additional land required for ponding purposes. Drawing No. 5 shows future expansion of the existing ponding area in relation to the proposed lift station location. The forcemain alignment is proposed to be along the future right-of-way required for 160th Street. A temporary construction easement along the forcemain alignment will also be �? necessary. Forcemain easements should also be obtained as part of a development agreement for the property. 1 i Section 31 Trunk Sanitary Facilities Preliminary Report Page 7 1 IPart 4 - Financing 4.1 Cost Estimates Detailed cost estimates for the proposed improvements are included in the Appendix of this report. These estimates are based on projected 1992 unit costs and they include allowances for contingencies (10 percent) and anticipated overhead costs (30 percent). The cost estimates were completed utilizing the following conditions for the undeveloped sites: • The site will not be graded prior to construction. • The site will be restored to existing grades and elevations. • The turf will be restored by seeding. • Easement costs are not part of the detailed cost estimates. A summary of total Project costs is as follows: Sanitary Sewer Alignment A $267,000 Sanitary Sewer Alignment B $325,000 Section 31 Trunk Sanitary Facilities Preliminary Report Page 8 Lift Station and Forcemain $159,000 Total Project Cost $426,000* *Total Project Cost utilizes Alternative Alignment A. The two trunk sewer alignments have different lateral sewer systems necessary to provide service. Therefore, to determine the most economical gravity sewer alignment, a comparison of the entire sanitary sewer system which serves the undeveloped parcel east of Shannon Parkway was completed. In evaluating the cost for each alternative, the following conditions were utilized: • Conditions listed under Part 4.1 above were utilized for Alignments A and B. • The lateral sanitary sewer systems required to compliment Alignments A and B were considered to be constructed after site grading was completed. • Only lateral facilities which differ from the other alternative's lateral facilities were considered in the cost comparison. Costs which were equal for both alignments were not included in the lateral compliment system cost. Table 2 gives a summary of the costs associated with each alignment. Section 31 Trunk Sanitary Facilities Preliminary Report Page 8 ITable 2 Gravity Sanitary Sewer Cost Comparison Alignment A Alignment B Proposed Trunk Sewer Cost $267,000 $325,000 Lateral Compliment System Cost 62,000 36,000 Comparable Cost $329,000* $361,000 *Alignment A has the lower systemwide cost. 4.2 Assessment Area The following parcels of land are located within the project area and are subject to assessments to recover the project costs: Parcel I.D. Name Parcel Description 34 03110 010 91 1 Isadore J. Gergen Part of SW 1/4 of SE 1/4 ofS31,T115, R19 4.3 Cost Recovery 4.3.1 Assessable Cost The assessable cost associated with each alternative alignment was estimated by calculating those costs necessary to serve only the project area. These costs are sometimes called residential equivalent costs, and they are summarized in Table 3. 1 1 Section 31 Trunk Sanitary Facilities Preliminary Report Page 9 1 Table 3 Assessable Costs Alignment "A" Alignment "B" $83,000 $101,000 4.3.3 Summary Assessable Cost _ _ $83,000 Sanitary Sewer Core Facility Costs $343,000 Total Project Cost = $426,000 Section 31 Trunk Sanitary Facilities Preliminary Report Page 10 I 4.3.2 Core Facility Cost A core facility cost has been defined as the difference in cost between the actual improvement and a residential equivalent improvement. For trunk sanitary sewer, the cost of the extra depth and pipe diameter of mains in excess of 8 inches is considered to be a City core facility cost. In addition, lift station and forcemain costs are also considered to be City core facility costs. These core facility costs are not assessable to the project area, but can be recovered from the Sanitary Sewer Core Facility Fund. Utilizing Alignment A, the sanitary core costs would be: Total Project Cost - Assessable Cost = Core Cost _ $426,000 - $83,000 = $343,000 4.3.3 Summary Assessable Cost _ _ $83,000 Sanitary Sewer Core Facility Costs $343,000 Total Project Cost = $426,000 Section 31 Trunk Sanitary Facilities Preliminary Report Page 10 I Part 5 - Project Schedule The proposed schedule for this improvement is listed below. This schedule is based on the provisions of Chapter 429 of the Minnesota Statutes. The schedule assumes that all elements of the improvement, including easement acquisition, are completed in a timely manner. Receive Report, Set Public Hearing July 7,1992 Hold Public Hearing, Order Plans and Specifications July 21, 1992 August 18,1992 Approve Plans and Specifications Open Bids September 25,1992 Receive Bids/Award Contract October 6,1992 Begin Construction October 1992 Substantial Completion December 1992 Final Completion Spring 1993 Hold Assessment Hearing Fall 1993 First Payment Due with Taxes May 1994 Section 31 Trunk Sanitary Facilities Preliminary Report Page 11 APPENDIX A DETAILED COST ESTIMATES AND DRAWINGS 1 L 11 Estimate Of Cost Gravity Sanitary Sewer Alignment A Description 1. 16" DIP CL 50 (40'-45') 2. 16" DIP CL 50 (35'-40') 3. 16" DIP CL 50 (30'-35') 4. 16" DIP CL 50 (25'-30') 5. 16" DIP CL 50 (0'-25') 6. JACK BORE, MIN 26" CASING Est. Unit Unit Qty. Price Amount L.F. 80 75.00 6,000 L.F. 500 65.00 32,500 L.F. 910 55.00 50,050 L.F. 190 50.00 9,500 L.F. 410 45.00 18,450 Subtotal Gravity Sanitary Sewer Align. A Plus 10% Contingencies Estimated Construction Cost Plus Overhead and Engineering (30%) Total Estimated Cost 14,000 7,700 9,240 8,000 10,320 7,000 8,500 5,120 $186,380 18,620 $205,000 62,000 $267,000 Section 31 Trunk Sanitary Facilities Preliminary Report Appendix A-1 W/16" DIP CARRIER L.F. 100 140.00 7. MANHOLES (10') EA. 7 1,100.00 8. EXTRA DEPTH MANHOLE L.F. 132 70.00 9. 16" X 4" SERVICE TEE EA. 32 250.00 10. SERVICE RISERS L.F. 688 15.00 11. MANHOLE DROP SECTION L.F. 56 125.00 12. TOPSOIL SALVAGE C.Y. 3,400 2.50 13. SEEDING ACRE 6.4 800 Subtotal Gravity Sanitary Sewer Align. A Plus 10% Contingencies Estimated Construction Cost Plus Overhead and Engineering (30%) Total Estimated Cost 14,000 7,700 9,240 8,000 10,320 7,000 8,500 5,120 $186,380 18,620 $205,000 62,000 $267,000 Section 31 Trunk Sanitary Facilities Preliminary Report Appendix A-1 1 1 1 1 1 1 1 1 1 i 1 1 1 i 1 1 1 1 Estimate Of Cost Gravity Sanitary Sewer Alignment B Description 1. 16" DIP CL 50 (45'-50') 2. 16" DIP CL 50 (40'-45') 3. 16" DIP CL 50 (35'-40') 4. 16" DIP CL 50 (30'-35') 5. JACK BORE, MIN 26" CASING Est. Unit Qty. Unit Price Amount L.F. 390 90.00 35,100 L.F. 340 75.00 25,500 L.F. 690 65.00 44,850 L.F. 680 55.00 37,400 Subtotal Gravity Sanitary Sewer Align. B Plus 10% Contingencies Estimated Construction Cost Plus Overhead and Engineering (300/6) Total Estimated Cost Section 31 Trunk Sanitary Facilities Preliminary Report 14,000 7,700 14,000 8,500 13,500 9,750 10,750 6,400 $227,450 22.550 $250,000 75.000 $325,000 Appendix A-2 W/16" DIP CARRIER L.F. 100 140.00 6. MANHOLES (10') EA. 7 1,100.00 7. EXTRA DEPTH MANHOLE L.F. 200 70.00 8. 16" X 4" SERVICE TEE EA. 34 250.00 9. SERVICE RISERS L.F. 900 15.00 10. MANHOLE DROP SECTION L.F. 78 125.00 11. TOPSOIL SALVAGE C.Y. 4,300 2.50 12. SEEDING ACRE 8.0 800 Subtotal Gravity Sanitary Sewer Align. B Plus 10% Contingencies Estimated Construction Cost Plus Overhead and Engineering (300/6) Total Estimated Cost Section 31 Trunk Sanitary Facilities Preliminary Report 14,000 7,700 14,000 8,500 13,500 9,750 10,750 6,400 $227,450 22.550 $250,000 75.000 $325,000 Appendix A-2 1 1 1 1 i 1 1 1 1 f i 1 1 i 1 1 1 1 Estimate Of Cost Lift Station and Forcemain Est. Unit Description Unit Qty. Price 1. LIFT STATION CAISSON & VALVE M.H. INSTALLATION PUMPS (25-30 H.P.) INSTALLATION CONTROLS ELECTRICAL SITE WORK 2. 12" PVC FORCEMAIN 3. ABANDON EX. LIFT STATION Amount L.S. 1 5,000.00 5,000 L.S. 1 12,000.00 12,000 EA. 2 12,000.00 24,000 L.S. 1 4,000.00 4,000 L.S. 1 9,000.00 9,000 L.S. 1 2,000.00 2,000 L.S. 1 4,000.00 4,000 L.F. 1,700 20.00 34,000 REMOVE EQUIPMENT L.S. 1 1,500.00 CONSTRUCT INVERT L.S. 1 500.00 REPLACE TOP SLAB L.S. 1 1,000.00 RESTORATION L.S. 1 500.00 4. RELOCATE TELEMETRY L.S. 1 2,000.00 5. IRREGULAR WIDTH PAVING S.Y. 100 10.00 6. CLEARING AND GRUBBING EA. 30 100.00 7. TOPSOIL SALVAGE C.Y. 1,200 2.50 8. SEEDING ACRE 1.5 800.00 9. EROSION CONTROL L.S. 1 3,000.00 Subtotal Lift Station And Forcemain Plus 10% Contingencies Estimated Construction Cost Plus Overhead and Engineering (30%) Total Estimated Cost Section 31 Trunk Sanitary Facilities Preliminary Report 1,500 500 1,000 500 2,000 1,000 3,000 3,000 1,200 3,000 $110,700 11,300 $123,000 37,000 $159,000 Appendix A-3 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Assessable and Core Cost Calculations Sanitary sewer core costs were determined by subtracting the assessable cost from the total project cost. The assessable cost was determined by laying out and calculating the costs of a residential equivalent sanitary system to serve only the undeveloped parcel east of Shannon Parkway. The cost of such a sewer system along Alignment A is indicated below as the assessable cost. Assessable Cost Est. Unit Description Unit Qty. Price Amount 1. 8" PVC (0'-10') L.F. 600 14.00 8,400 2. 8" PVC (10'-15') L.E 1,490 18.00 26,820 3. JACK BORE, MIN 16" CASING W/8" DIP CARRIER PIPE L.F. 100 120.00 12,000 4. MANHOLES (10') EA. 7 1,100.00 7,700 5. EXTRA DEPTH L.F. 25 70.00 1,750 6. SERVICE CONNECTOR EA. 32 35.00 1,120 Subtotal Assessable Cost $57,790 Plus 10% Contingencies 6.210 Estimated Construction Cost $64,000 Plus Overhead and Engineering (300/6) 19.000 Total Estimated Assessable Cost $83,000 Core Cost Total Project Cost - Assessable Cost = Core Cost $426,000 - $83,000 = $343,000 Section 31 Trunk Sanitary Facilities Preliminary Report Appendix A- 4 r m m mm mm m m m m m m mIIIIIIII m m O D C/) Z M D 0 �c m m m Z In rn 0 �D D D m C)—SUBDISTRICT BOUNDARYSTRI T =SUBDISTRICT NUMBER — ..� — � PROPOSED TRUNK MAI Qp =PEAK FLOW (DESIGN) N ■ PROPOSED LIFT STATION Q =PIPE CAPACITY — — F — -- PROPOSED FORCE MAIN ' I = I � > I s I � I I I I � l I I0 =0.7404 cfs I0=1.18 cfs r s t I C.S.A.H. 42 n I � L_ > r in 104 � O C - ��--�Qp=1.1911 cfs 0=2.5088cfs ro 8" Qp=1.7129 .cfs — — 0=2.8787 cfs !10p=0.6366 cfs 16_� _ _ 0=0.76 cfs Q=900 gpm =1.9687 cfs (A.-� ti 160TH STREET W NQp=2.5555cfs N" 4m 0=2.5086 cfs o Z Np I C.S.A.H. 42 n I � L_ > r in 104 � O C - ��--�Qp=1.1911 cfs 0=2.5088cfs ro 8" Qp=1.7129 .cfs — — 0=2.8787 cfs !10p=0.6366 cfs 16_� _ _ 0=0.76 cfs Q=900 gpm =1.9687 cfs (A.-� ti 160TH STREET W 1 1 i F] 1 r] FI tea, _J �— L_J L_------- - - LO) Q=TTTTTco T1 r�rTTTTTrTTTTrT M 2 � W Q W V7 82 W O 7! n I I _� / �" u LU U) I —) I \ � I I co ' �' / — 4 g Z _ Z Q� y WCC t3 y w 'AM)Id �\ I NONNVHS I / v IL Jq) I y Boa oul °w cri o G Q z�IL�� W W —� ! / � / I�I M 0 o 1 I0 I 1 �— —r � O w�cc 0 0 � 3 � 3 — F— LU w a d ti CO N v_ w g m W o t H _cr z o Q !!) Z I I am In � w LL I W Vf y ' Y I( 3A-RANVO r �J [J 1 11 ccz TTTTT �-1 r�TTTTrrTTTTrT NOPMIrHSz Ix O \` 2 N ? W K Q�a 3 N <L— N ir O I z m I Z \ � Z \ � a a 1 I I 3 _ JCO Z U 0 UJ 0 0 CL C 3 i m as m LL W AWA — W p a N ? W K Q�a 3 N <L— N ir O I z m I 1 H N LL N 1 I I 3 _ N ? W K Q�a 3 N _T_ PR�. PO ED FUTUR EXPAN 0 -.OF- P914MW AREi� SCALE W FEET 0 100 200 400 3 � a LJ, - z O Z j � I \ I PR POSED L T STA ION 41TEL SA�ITA Y., EWE SU DIS RICT 102 160TH ST ROSEMOUNT, MINNESOTA FILE NO. 92442 LIFT - STATION SITE LOCATION DR G. NO. WGMYEERS / ARCNl1t�TS I ILAMNERf