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HomeMy WebLinkAbout7.a. Accept Feasibility Report / Set Hearing Date - O'Leary's 4th Addition, City Project #184� 4 DATE: APRIL 13, 1988 TO: MAYOR & COUNCILMEMBERS C/O CITY ADMINISTRATOR JIL FROM: CITY ENGINEER HEFTI RE: ITEMS FOR THE APRIL 19, 1988 COUNCIL MEETING NEW BUSINESS Accept Feasibility Report/Set Hearing Date for O'Leary's Hills 4th Addition Public Improvements, Project #184 I have reviewed the feasibility report that our Consultants completed regarding the installation of utilities and streets within the O'Leary's Hills 4th Addition. I am enclosing a copy of the feasibility report for Councils information. Because the feasibility report finds the improvements feasible from an engineering standpoint, I would recommend that Council receive the feasibility report and set a public hearing for Project #184, O'Leary's Hills 4th Addition Utility and Street Improvements, at 8:00 p.m. on May 17, 1988. A representative from our Consulting Engineering firm who prepared the report will be available to provide a brief overview of the project. Until then, should Council have any questions or concerns regarding this project, please feel free to contact me at Councils convenience. i �ff I i CITY OF ROSEMOUNT RESOLUTION 198$ - A RESOLUTION RECEIVING THE FEASIBILITY REPORT OF CITY PROJECT #184 O'LEARY'S HILLS 4TH ADDITION STREET AND UTILITIES IMPROVEMENTS, AND CALLING FOR PUBLIC HEARING TO CONSIDER THE PROJECT WHEREAS, the City Council deemed it necessary and expedient that the City of Rosemount, Minnesota, construct certain improvements, to -wit: City Project #184, O'Leary's Hills 4th Addition Street & Utility Improvements, 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 street and utility improvements, City Project 184, 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 Administrator/Clerk on April 19, 1988; 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. NOW THEREFORE BE IT RESOLVED, by the City Council of the City of Rosemount that a public hearing be scheduled to consider City Project #184, O'Leary's Hills 4th Addition Street and Utility Improvements to be held on Tuesday, May 17, 1988 at 8:00 o'clock p.m. in the Council Chambers of City Hall. ADOPTED this 19th day of April, 1988. Rollan Hoke, Mayor ATTEST: I s I Stephan Jilk, Administrator/Clerk I f I j I I i m fi / f 17 JY i I I UNIVER 4TY - OF AGRICULTURAL ~ ROSEM" fl i ' P/L. pg�MpL� 4' tall IRI H iOUN. scop 1 s ` C.` I �rv, r{• ! .'�� �' AF`s .. ��-- m fi / f 17 JY i I I UNIVER 4TY - OF AGRICULTURAL ~ ROSEM" fl i ' P/L. pg�MpL� 4' tall IRI H iOUN. scop 1 1 1 1 1 1 1 i 1 1 1 1 1 1 1 1 1 1 0 3 0 CL c 0 c C- 0 C- 100 0 100 200 T- 50 V i .w r~m* ww"1� 66+r • FILE N0. N pwww" oyn..ww w Gi..e w O'LEAR1�'S HILLS 4th 88174 2 �� �� ROSEMOUNT, MINNESOTA DATE Lwoa� o� �, s „tia o.� ANFfmcmPLAN+S" SANITARY SEWER aria 8e5 100 0 100 200 50 L ILC N V. O'LEARYS HILLS 4th ,- ROSEMOUNT, MINNESOTA Dena 3 .�.�. r ��• DATE " ft.W."gas M_ �„�.�7� WATERMAIN 14119188V 5 0 3 0 c 0 c C: 0 s 100 0 100 200 50 IwMr wtltr Nal al. Mm s Pn,../ 07.m al ww-�r-oo - -»"l� - •Ar 0 LEARY'S HILLS 4th no ^Vhodmd�..... me low 10 N. OWNROSEMOUNT, MINNESOTA STORM SEWER N0. BY GATE - REVISIONS ITEM. OESM CFIMM , TURE ORM WER FILE N0. 88174 4 DATE .5 4/19/88 0 0 n C: 0 c C: 0 100 0 100 200 N 50 KE NO. N ROSEMOUNT, MINNESOTA D'LEARY'S HILLS 4th U174 5 ,AN0WWC19,ft STREET dt STREET LIGHTING 4,,191ee 5` FEASIBILITY STUDY FOR UTILITY AND STREET CONSTRUCTION IN O'LEARY'S HILLS 4TH ADDITION CITY PROJECT NO. 184 April 19, 1988 SEH FILE NO: 88174 I hereby certify that this report was prepared by me or under my direct supervision and that I am a duly Registered Professional Engineer under the laws of t e State of Minnesota. �(J !C04� DATE: '¢ 9/ $ S REG. NO. REVIEWED BY: DATE: 12691 AV AAASEH ENGINEERS ■ ARCHITECTS ■ PLANNERS April 19, 1988 222 EAST LITTLE CANADA ROAD, ST PAUL, MINNESOTA 55117 612 484-0272 City of Rosemount 2875 145th Street West Rosemount, MN 55068 RE: ROSEMOUNT, MINNESOTA O'LEARY'S HILLS 4TH ADDITION STREET AND UTILITIES SEH FILE NO: 88174 Attn: Rich Hefti, Director of Public Works Gentlemen: In accordance with your authorization we have prepared the attached feasibility report for utility and street construction in O'Leary's Hills 4th Addition. This report discusses sanitary sewer, watermain, drainage, streets, and street lighting improve- ments, and provides cost estimates for each. We would be pleased to review this report with you in detail. Sincerely, SHORT-ELLIOTT-HENDRICKSON, INC. Steve Campbell SDC/cih SHORT ELLIOTT ST PAUL, CHIPPEWA FALLS, HENDRICKSON INC. MINNESOTA WISCONSIN TABLE OF CONTENTS TITLE PAGE CERTIFICATION LETTER OF TRANSMITTAL TABLE OF CONTENTS EXECUTIVE SUMMARY PART 1 - INTRODUCTION 1.1 Authorization 1.2 Scope 1.3 Data Available PART 2 - GENERAL BACKGROUND 2.1 Location 2.2 Project Area 2.3 Existing Conditions 2.4 Adjacent Property PART 3 - PROPOSED IMPROVEMENTS 3.1 Sanitary Sewer 3.2 Watermain 3.3 Drainage 3.4 Street Construction 3.5 Street Lighting 3.6 Easements PART 4 - FINANCING 4.1 Cost Estimates 4.2 Assessment Area 4.3 Cost Recovery 4.3.1 Core Facilities 4.3.2 Assessments 4.3.3 Summary 4.4 Pending Assessments PART 5 - PROJECT SCHEDULE APPENDIX ESTIMATES OF COST DRAWINGS 1-5 EXECUTIVE SUMMARY City Project 184 provides for the construction of sanitary sewer, watermain, storm sewer, street and lighting facilities in O'Leary's Hills 4th Addition. This development consists of 31 single family residential lots and is located in the northeast quarter of Section 31 adjacent to Shannon Parkway and O'Leary's Hills 3rd Addition. The project includes approximately 1,560 feet of sanitary sewer; 2,150 feet of watermain; 465 feet of storm sewer; 1,600` feet of street construction; and 4 street lights. The total estimated project cost is $273,000. Of the total, $249,000 will be recovered through assessments and the remaining $24,000 will be obtained from the Sanitary Sewer Core Facility Fund. The project is scheduled for construction during the 1988 construction season. PART 1 - INTRODUCTION 1.1 AUTHORIZATION On March 15, 1988 the Rosemount City Council, upon petition by the owner, authorized the preparation of an engineering feasibility report for utilities and street construction in O'Leary's Hills 4th Addition. This project has been designated as City Project No. 184. 1.2 SCOPE The purpose of this report is to determine the engineering feasibility of this project based upon a review of the data available, and to make recommendations and provide cost estimates for the construction of sanitary sewer, watermain, storm sewer, street and lighting facilities in O'Leary's Hills 4th Addition. 1.3 DATA AVAILABLE Information and materials used in the preparation of this report include: 1. Final plat of O'Leary's Hills 4th Addition (March, 1988). 2. O'Leary's Hills Residential Planned Unit Development (PUD) Information (March, 1987). 3. Utility Study for Section 31 (December, 1978). 4. City of Rosemount Topographic Maps. 5. City of Rosemount Construction Record Drawings. Part 1 - 1 PART 2 - GENERAL BACKGROUND 2.1 LOCATION The project area is located in the southwest quarter of the northeast quarter of Section 31 and lies between Shannon Parkway and Chippendale Avenue north of 155th Street as shown on Drawing No. 1. 2.2 PROJECT AREA O'Leary's Hills 4th Addition consists of 31 single family residential lots, rights-of-way for segments of 153rd Street, Columbia Way, Claret Avenue and the Columbary Circle cul-de-sac, and Outlot A, which includes a proposed City storm water detention pond. This is the fourth phase of the O'Leary's Hills PUD. 2.3 EXISTING CONDITIONS The project area is currently used for agricultural purposes. In accordance with City requirements all street and site grading will be completed by the developer in accordance with the master grading plan submitted in the approved PUD. The required street grading includes core excavation of all plastic (non -suitable) materials within the roadway area and replacement with granular (suitable) materials. 2.4 ADJACENT PROPERTY The project area is located immediately east of Shannon Parkway and immediately north of O'Leary's Hills 3rd Addition. Street and utility construction in O'Leary's Hills 3rd Addition was nearly completed in 1987 under City Project No. 175. Utility construction was completed in Shannon Parkway in 1987 with the remaining street construction to be completed this spring under City Project No. 171. Part 2 - 1 PART 3 - PROPOSED IMPROVEMENTS 3.1 SANITARY SEWER Proposed sanitary sewer facilities are shown on Drawing No. 2. These facilities include the northerly extension of an inplace 12" sewer on Columbia Way to 153rd Street; the westerly extension of an 8" sewer along 153rd Street from Columbia Way to Shannon Parkway; the easterly extension of a 10" sewer along 153rd Street from Columbia Way to Claret; and the northerly extension of an 8" sewer into the Columbia Circle cul-de-sac from 153rd Street. The 10" and 12" lines will be constructed at extra depth to provide for future extensions from the manhole stubs at 153rd Street and Claret to the north and east. These extensions will provide service to the remainder of the Section 31 service area bounded by Chippendale Avenue and County Road 42. The proposed facilities also include the extension of 4" services 10' into each lot from the proposed mains in the street. Service risers will be installed on the extra depth 10" main. 3.2 WATERMAIN Proposed watermain facilities are shown on Drawing No. 3. These facilities include the northerly extension of an inplace 6" main on Columbia Way to 153rd Street; the easterly extension of an 8" main from Shannon Parkway to Claret; the northerly extension of an 8" main on Claret Avenue from mid -block to 153rd Street; and the northerly extension of a 6" main through the Columbary Circle cul-de- sac to the northeast corner of the plat. This main will ultimately be extended to connect with a main in Claret Avenue. The proposed facilities will also include the extension of 1" services 10' into each lot from the proposed mains in the street. Part 3 - 1 i 1 1 I r 1 1 3.3 DRAINAGE Proposed storm ,sewer facilities are shown on Drawing No. 4. These facilities include the northerly extension of an inplace 15" storm sewer on Columbia Way to 153rd Street and the construction of a 12" storm sewer from the Columbary Circle cul-de-sac to the detention pond located in Outlot A. Inlets are proposed to collect storm runoff at the upstream end of each of these lines. In a subsequent phase, an overflow storm sewer from .the detention pond in Outlot A will be constructed as shown in Drawing No. 4. This sewer will transport flows from the detention pond southeasterly to the inplace trunk storm sewer in Chippendale Avenue via Claret Avenue and 153rd Street through future phases of the O'Leary's Hills PUD. 3.4 STREET CONSTRUCTION The construction of standard city streets is proposed as shown on Drawing No. 5. The proposed streets are 30 feet wide with a cul-de-sac radius of 45 feet. The proposed street section consists of a 2" bituminous wearing course and 2" bituminous binder course placed over a 6" aggregate base with design D418 (surmountable) concrete curb and gutter. This section assumes that a granular subgrade will be provided by the developer. The developer will also be responsible for the restoration of the boulevard areas as a part of the final lot development. Street construction in Claret Avenue will be included in a subsequent phase after the installation of the future storm sewer. 3.5 STREET LIGHTING The type and location of proposed street lights are also shown on Drawing No. 5. Type A lighting units are 15 feet Part 3 - 2 high with post to g p p mounted fixtures. Type H lighting units are 25 feet high with the fixtures mounted on a 2-1/2 foot mast arm. Street lighting facilities will also include the installation of feedpoints and connector runs to each of the units. The feedpoints will be installed adjacent to transformers which will be located and installed by the local electric utility (NSP). 3.6 EASEMENTS A 10 foot utility easement will be required on each of Lots 13 and 14 of Block 3 along either side of their common lot line for the installation of the proposed 6 watermain. A 10 foot utility easement will also be required on each of Lots 11 and 12 of Block 3 along either side of their common lot line for the installation of the proposed 12 storm 7r sewer. Part 3 - 3 1 1 1 4.1 COST ESTIMATES PART 4 - FINANCING Detailed cost estimates for all improvements proposed herein are included in the Appendix of this report. These estimates are based on projected 1988 unit costs and include allowances for contingencies (10$) and anticipated overhead costs (20%). These estimates do not include any costs for street or site grading or easements which will be required of the developer as a part of the Development Contract with the City. A summary of these costs is as follows: Sanitary Sewer $ 90,000 Watermain 70,000 Storm Sewer 20,000 Street Construction 80,000 Lighting 13,000 Total $273,000 4.2 ASSESSMENT AREA The following parcel of land is located within the project area and is subject to assessments to recover the project costs. The west half of parcel #34-03110-013-17, which is proposed to be platted as O'Leary's Hills 4th Addition Block 1, Lots 1 through 6 Block 2, Lots 1 through 7 Block 3, Lots 1 through 18 4.3 COST RECOVERY 4.3.1 Core Facilities The estimated cost of the extra depth and pipe diameter of the 10" and 12" sanitary sewers, which is necessary to provide service to future Part 4 - 1 development areas, is considered to be a City core facility cost. This cost is not assessable to the project area but can be recovered from the Sanitary Sewer Core Facility Fund. With standard contingencies and overhead allowances, this cost is estimated to be $24,000. This cost is calculated as the differential unit cost of the core facilities from the standard residential sanitary sewer and is based on the following estimated unit costs: ITEM NO. DESCRIPTION UNIT UNIT PRICE 0256.408 8" PVC, 14'-16' DEEP L.F. $17.00 0256.514 12" RCP, CL. V 24'-26' DEEP L.F. 35.00 0256.610 10" DIP, 24'-26' DEEP L.F. 40.00 The calculation is as follows: ITEM UNIT PRICE NO QUANTITY UNIT DIFFERENTIAL AMOUNT 0256.514 145 L.F. X (35.00 - 17.00) = $ 2,610 0256.610 670 L.F. X (40.00 - 17.00) = 15,410 SUBTOTAL $18,020 +10$ CONTINGENCIES 1,980 ESTIMATED CONSTRUCTION COST $20,000 +20$ OVERHEAD & ENGINEERING 4,000 TOTAL ESTIMATED COST $24,000 4.3.2 Assessments After the core facility cost has been subtracted from the total estimated cost of the project, the remaining assessable amount is $249,000. Spreading this amount over the 31 lots in the project area, the total estimated assessment rate for each lot is $8,030. Part 4 - 2 4.3.3 Summary Assessments (31 @ $8,030) _ $249,000 Core Facility Costs = 24,000 Total $273,000 4.4 PENDING ASSESSMENTS Pending assessments against the project area for the construction of Shannon Parkway Street Improvements, City Project No. 171, are estimated to be $1,514/Acre. Part 4 - 3 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. It assumes that all elements of the improve- ment, including developer obligations are completed in a timely manner. Receive Feasibility Report Hold Public Hearing Approve Plans & Specifications Receive Bids Award Contract Begin Construction Complete Construction Hold Assessment Hearing First Payment Due with Taxes Part 5 - 1 April 19, 1988 May 17, 1988 June 21, 1988 July 14, 1988 July 19, 1988 August, 1988 October, 1988 Spring, 1989 May, 1990 ESTIMATE OF COST SANITARY SEWER CITY PROJECT NO. 184 ROSEMOUNT, MINNESOTA ITEM UNIT NO. DESCRIPTION UNIT QUANTITY PRICE AMOUNT 0256.408 8" PVC, 10'-12' DEEP L.F. 605 $13.00 $ 7,865 0256.408 8" PVC, 12'-14' DEEP L.F. 90 15.00 1,350 0256.408 8" PVC, 14'-16' DEEP L.F. 50 17.00 850 0256.514 12" RCP, CL. V 24'-26' DEEP L.F. 145 35.00 5,075 0256.610 10" DIP, 24'-26' DEEP L.F. 670 40.00 26,800 0256.701 STANDARD MANHOLE, 8' DEEP EACH 6 1,000.00 6,000 0256.702 EXCESS DEPTH STANDARD MANHOLE L.F. 25 75.00 1,875 0256.706 MANHOLE DROP SECTION L.F. 35 125.00 4,375 0256.801 8" BY 4" PVC WYE EACH 17 40.00 680 0256.801 10" BY 4" DIP TEE EACH 14 80.00 1,120 0256.803 4" PVC SERVICE L.F. 1,250 5.00 6,250 0256.805 4" DIP RISER L.F. 225 25.00 5,625 0256.900 CONNECT TO EXISTING SEWER EACH 1 300.00 300 SUBTOTAL +10% CONTINGENCIES ESTIMATED CONSTRUCTION COST +20$ OVERHEAD & ENGINEERING TOTAL ESTIMATED COST $68,165 6,835 $75,000 15,000 $90,000 ESTIMATE OF COST WATERMAIN CITY PROJECT NO. 184 ROSEMOUNT, MINNESOTA ITEM UNIT NO. DESCRIPTION UNIT QUANTITY PRICE AMOUNT 0257.406 6" DIP WATERMAIN, CL. 52 L.F. 750 $13.00 $ 9,750.00 0257.408 8" DIP WATERMAIN, CL. 52 L.F. 1,400 17.00 23,800.00 0257.606 6" R.S. GATE VALVE AND BOX EACH 2 400.00 800.00 0257.608 8" R.S. GATE VALVE AND BOX EACH 3 550.00 1,650.00 0257.630 FITTINGS LESS THAN 12" LB. 600 1.25 750.00 0257.640 FIRE HYDRANT EACH 5 900.00 4,500.00 0257.710 1" COPPER SERVICE L.F. 1,300 6.00 7,800.00 0257.730 1" CORPORATION EACH 31 30.00 930.00 0257.740 1" CURB STOP EACH 31 70.00 2,170.00 0257.806 INSULATION BD. FT. 150 1.00 150.00 0257.903 CONNECT TO EXISTING WATERMAIN EACH 3 200.00 600.00 SUBTOTAL +10$ CONTINGENCIES ESTIMATED CONSTRUCTION COST +20$ OVERHEAD & ENGINEERING TOTAL ESTIMATED COST $52,900.00 7,100.00 $60,000.00 10,000.00 $70,000.00 ESTIMATE OF COST STORM SEWER CITY PROJECT NO. 184 ROSEMOUNT, MINNESOTA ITEM UNIT NO. DESCRIPTION UNIT QUANTITY PRICE AMOUNT 0258.401 12" RCP CATCH BASIN LEADS, CL. IV L.F. 110 $23.00 $ 2,530 0258.412 12" RCP STORM SEWER, CL. IV L.F. 190 20.00 3,800 0258.415 15" RCP STORM SEWER, CL. IV L.F. 165 24.00 3,960 0258.603 MANHOLE, TYPE B L.F. 5 125.00 625 0258.704 CATCH BASIN, TYPE X L.F. 16 110.00 1,760 0258.801 R 1733 MH CASTING EACH 1 150.00 150 0258.930 R 3067 CB CASTING EACH 4 200.00 800 0258.920 RIPRAP C.Y. 3 50.00 150 SUBTOTAL +10$ CONTINGENCIES ESTIMATED CONSTRUCTION COST +20% OVERHEAD & ENGINEERING TOTAL ESTIMATED COST $14,055 945 $15,000 5,000 $20,000 ESTIMATE OF COST STREET CONSTRUCTION CITY PROJECT NO. 184 ROSEMOUNT, MINNESOTA ITEM UNIT NO. DESCRIPTION UNIT QUANTITY PRICE AMOUNT 2105.501 COMMON EXCAVATION C.Y. 500 $1.00 $ 500 2105.521 GRANULAR BORROW (LV) C.Y. 500 3.00 1,500 2111.501 TEST ROLLING R.S. 16 40.00 640 2112.501 SUBGRADE PREPARATION R.S. 16 80.00 1,280 2211.503 AGG. BASE PLACED CLASS 5 C.Y. 1,000 10.00 10,000 2211.504 BIT. MAT, FOR MIX. TON 70 175.00 12,250 2341.504 WEARING COURSE MIX. TON 600 14.00 8,400 2341.510 BINDER COURSE MIX. TON 600 13.00 7,800 2357.502 BIT. MATERIAL FOR TACK COAT GAL. 300 1.50 450 2504.602 ADJUST GATE VALVE BOX EACH 3 100.00 300 2506.522 ADJUST FRAME AND RING CASTING EACH 7 130.00 910 2531.501 CONCRETE CURB & GUTTER, DESIGN D418 L.F. 3,200 5.00 16,000 SUBTOTAL +10$ CONTINGENCIES ESTIMATED CONSTRUCTION COST +20$ OVERHEAD & ENGINEERING TOTAL ESTIMATED COST $60,030 4,970 $65,000 15,000 $80,000 ESTIMATE OF COST LIGHTING CITY PROJECT NO. 184 ROSEMOUNT, MINNESOTA ITEM UNIT NO. DESCRIPTION UNIT QUANTITY PRICE AMOUNT 2545.511 LIGHTING UNIT, TYPE A EACH 1 $900.00 $ 900 2545.511 LIGHTING UNIT, TYPE B EACH 3 1,200.00 3,600 2545.532 UNDERGROUND CONDUCTOR L.F. 1,000 2.50 2,500 2545.552 FEED POINT EACH 3 1,000.00 3,000 SUBTOTAL $10,000 +10$ CONTINGENCIES 1,000 ESTIMATED CONSTRUCTION COST $11,000 +20% OVERHEAD & ENGINEERING 2,000 TOTAL ESTIMATED COST $13,000 W J Q w J CL CL Q ENGINEERS 0 ARCHITECTS 6 PLANNERS b A Z / --- O+ M -- - 0.0 M - 0.3ee 04' P611F."i 146 TH 5 7 TH a , ST W' S�REI UPPER•147/TH Sl 148 iH...+ST a • q x 1 s= u14 TH S,RE ETi UPPER •WBTH ST` W.'3 �• .� t a•� 2 w ° 'i'4e 149 W �» i 'a • • n •.� 1149 t • • �LPPER TH ST 1 14 s e oa I oa-e I T PROJECT EMPIRE OILEARY'S HILLS 4TH. ADDITION 0,0 50 i 1 � a 1 - 1 aeo m f 0.e -10 XwwM run NS 00 ow -r f FJLE NG 88174 7)RG NO I/5