The URL can be used to link to this page

Home My WebLink About8B - Ring Road Feasibility CITY COUNCIL AGENDA REPORT DATE: AGENDA #: PREPARED BY: SUBJECT: March 19,2001 8B Bud Osmundson, Public Works Director CONSIDER APPROVAL OF A RESOLUTION RECEIVING THE FEASIBILITY REPORT, ORDERING THE PREPARATION OF PLANS AND SPECIFICATIONS, and AUTHORIZING APPRAISALS OF BENEFITED PROPERTIES FOR THE RING ROAD, CITY PROJECT NO. 01 - 01. DISCUSSION: HISTORY At the September 18, 2000 meeting, the City Council adopted Resolution No. 00-94 authorizing WSB and Associates to provide engineering services and to prepare a feasibility report for the construction of the Ring Road between the Duluth Avenue / Tower Street intersection and just east of the proposed Ring Road / Toronto Avenue intersection. This project is identified as City Project No. 01 - 01 and is in the approved 2001-2005 Capital Improvement Program. On December 4, 2000, the City Council authorized staff to request a variance from Municipal State Aid Standards for two horizontal curves on the project. The variance was granted by the Variance Committee on December 20. A map of the project area is included in the Feasibility Report. The proposed project includes new street construction, street reconstruction on Duluth Avenue, a small amount of sanitary sewer and water main construction, storm drainage facilities, sidewalk, and appurtenant work. The purpose of this item is to have the Council receive the feasibility report and order the preparation of plans and specifications. The resolution also authorizes the initiation of appraisals of properties. CURRENT CIRCUMSTANCES / ISSUES The attached report includes the estimated City costs and funding for the project. The total estimated cost of the project is $1,321,600. The majority of the cost is for street improvements which are expected to be funded by Municipal State Aid (MSA). The storm drain facilities will be funded by MSA and the Trunk Reserve Fund. The water main and sanitary sewer improvements will be funded by the Trunk Reserve Fund. The funding for the purchase of right of way for the proposed street is X\017nOS73'Ad~I~;~~eCs\t~n~~~P~or Lake, Minnesota 55372 / Ph. (952) 440-9675 / Fax (952) 440-9678 AN EQUAL OPPORTUNITY EMPLOYER 'Ii . 1 "Ii;' X: \Osmundson\Ri ngRoad\AgendaReceiveFRordP&S ,doc also to come from MSA funds. Special assessments may be a part of the above referenced funding depending upon appraisal results. The proposed water main improvements include a new 8-inch main which will connect Duluth to Toronto on the new alignment and provide an additional loop for water flow and fire protection in this area. The proposed 8 inch sanitary sewer extension is to provide service to possible future parcels created by the Ring Road. Storm sewer improvements are required to be designed to MSA standards for the new street and any stormwater the street intercepts. Currently the storm water runoff from the Marquette Bank and PriOI"dale Mall flows overland to the wetland on the future post office site. The new Ring Road will intercept this runoff and the storm water system underlying the Ring Road will carry it to the ponding area on the south side of Tower Street owned by the city. Some minor changes could be made in the storm drainage facilities design depending on the results of a study currently being completed for the 30 acre drainage area including the Park Nicollet / proposed Crystal Care site, east ofthis project area. The proposed street is to be 42 feet wide with 5 feet wide concrete sidewalks flanking it on both sides. The width is necessary to accommodate a center turn lane, which will allow safe left turns to the many accesses (driveways) in the project area. The cost estimate will not change significantly at this stage using the second option shown in the feasibility report which includes the alignment change through the Priordale Mall property. Staff has been meeting with affected property owners on an individual basis to describe the project and its affects on each property. We have two affected property owners remaining to meet with individually which should be complete in the next week. Staff has also been in contact with an appraiser to begin the process of appraising properties for the acquisition of right of way and to determ ine if there are properties in the project area which benefit from the proposed improvements. When the individual meetings with property owners have been completed and the appraiser has determined whether or not there are benefits to properties in the project area, then the city council will be asked to address relevant policy issues. Following that, an informational meeting will be scheduled to share information and respond to questions on the Ring Road project. The purpose of the action required at tonight's meeting is to allow staff and the consultant to begin preparation of detailed plans and specifications. This accomplishes two items: ]) the detailed plans are needed to identify exact legal descriptions for the property to be 2 FINANCIAL IMP ACT: AL TERNA TIVES: RECOMMENDED MOTION: X :\Osmund~n\RingRoad\AgendaReceiveFRordP&S .doc I r r acquired 2) s1l1ce this is a State Aid project the plans have to be reviewed by MnDOT prior to city council approval of the plans and specifications which is usually a two month process. CONCLUSION In summary, the project is feasible from an engineering and economic standpoint. Approval of the Feasibility Report and ordering the preparation of plans and specifications does not grant final approval of the project. That can be done at a later date prior to authorizing the advertisement for bid. City Project No. 01 - 01 is proposed to be financed by Municipal State Aid and trunk reserve funds and potentially special assessments. Funding sources and amounts exclusive of special assessments are as shown below: Funding Source Amount MSA $ I , I 89, ] 00 Trunk Reserve $]32,500 Special Assessments To be determined Project Total Cost $1,321,600 These estimates of cost include a ] 0 % contingency, 28 % indirect costs, and right of way acquisition which can vary significantly. The funding sources shown above may change depending on the analysis of the appraiser if benefits are shown to exist from the proposed improvements. The alternatives are as follows: ]. Approve a Resolution receiving the Feasibility Report and ordering the preparation of plans and specifications. 2. Table the resolution for a specific reason. 3. Deny the Resolution. Staff recommends alternative number one described above. ,., .) II lET RESOLUTION 01;,1 21- RESOLUTION RECEIVING THE FEASIBILITY REPORT, ORDERING THE PREPARATION OF PLANS AND SPECIFICATIONS and AUTHORIZING APPRAISALS OF BENEFITED PROPERTIES FOR THE "RING ROAD", CITY PROJECT NO. 01-01 MOTION BY: Jf SECOND BY: Jc WHEREAS, Pursuant to Resolution 00-94, on September] 8, 2000, the City Council authorized WSB & Associates to provide engineering services and ordered a feasibility report to be prepared to study the feasibility of constructing the "Ring Road" between the intersection of Duluth A venue and Tower Street, and the intersection of the "Ring Road" and Toronto A venue; and WHEREAS, The report provides information regarding whether the proposed project is necessary, cost-effective, and feasible; and WHEREAS, The report has been presented to the City Council on March] 9, 200]. NOW THEREFORE, BE IT RESOLVED BY THE CITY COUNCIL OF PRIOR LAKE, MINNESOTA, that ]. The City Council hereby accepts the Feasibility Report as submitted, and the improvements described therein are necessary, cost-effective and feasible. 2. WSB & Associates is hereby ordered to prepare plans and specifications for the making of such im provements. 3. BCL Appraisals is hereby authorized to conduct appraisals on the properties benefited by this project. Passed this 19th day of March 2001. YES NO Mader \ Mader Ericson \ Ericson Gundlach \ Gundlach Petersen \ Petersen Zieska Zieska { Seal } City Manager AgendaReceiveFRordP&S 17073 Adelmann St. S.E., Prior Lake, Minnesota 55372 / Ph. (952) 440-9675 / Fax (952) 440-9678 AN EQUAL OPPORTUNITY EMPLOYER ~ ~ o ~ ~ ~ . ,.....;) p--~~ . ,.....;) ,..c . ,.....;) c:IJ ~ ~ H[ Ring Road Toronto Avenue to Tower Street for the WSB Proj. No. 1283-002 Submitted to: City of Prior Lake 16200 Eagle Creek Avenue Southeast Prior Lake, Minnesota 55372 ~ WSB & Associates, Inc. Date: March 19,2001 4150 Olson Memorial Highway Suite 300 Minneapolis, MN 55422 INFRASTRUCTURE A ENGINEERS A PL^NNERS 763-541-4800 FAX 763-541-1700 I I UII Feasibility Report for Ring Road - Toronto Avenue to Tower Street for the City of Prior Lake S.A.P. No. 201-113-02 City Project No. 01-01 March 19, 2001 Prepared by WSB & Associates, Inc. 4150 Olson Memorial Highway Suite 300 Minneapolis, MN 55422 (763) 541-4800 (763) 541-1700 (fax) Feasibility Report City of Prior Lake, MN Ring Road -- Toronto Avetlue to Tower Street S.A.P. No. 2OJ~113-02 City Project No. OJ-01 WSB Project No. 1283-00 .1 r 1 ~ nil ~ WSB & Associates, Inc. 55422 - 763-54H800 763.54H700 FAX March 19, 2001 Honorable Mayor and City Council City of Prior Lake 16200 Eagle Creek Drive Prior Lake, MN 55372 Re: Feasibility Report Ring Road -- Toronto Avenue to Tower Street S.A.P. No. 201-113-02 City Project No. 01-01 WSB Project No. 1283-00 Dear Mayor and Council Members: Transmitted herewith is a feasibility report which addresses the construction of that segment of the Ring Road project from Toronto Avenue to Tower Street, including storm sewer, sanitary sewer and watermain improvements. We would be happy to discuss this report with you at your convenience. Please do not hesitate to contact me at (763) 287-7195 if you have any questions or comments regarding this report. Sincerely, David E. Hutton, P .E. Associate nm Minneapolis. st. Cloud. Equal Opportunity Employer II r 1 II flIT Certification I hereby certify that this plan, specification or report was prepared by me or under my direct supervision and that I am a duly licensed professional engineer under the laws of the State of Minnesota. ~~gt-. David E. Hutton, P .E. Date: March 19,2001 Lie. No. 19133 Feasibility Report City of Prior Lake, MN Ring Road -- Toronto Avenue to Tower Street S.A.P. No. 201-113-02 City Project No. 01-01 WSB Project No. 1283-00 . " r I II VII Table of Contents 1. Executive Summary ................................................ Page 1 2. Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 2 2.1 Authorization Page 2 2.2 Scope Page 2 2.3 Data Available Page 2 3. General Background. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. Page 2 3.1 3.2 3.3 Project History Project Zoning Existing Conditions Page 2 Page 3 Page 3 4. Proposed Improvements ............................................. Page 4 4.1 Streets and Storm Sewer Page 4 4.2 Sanitary Sewer and Watermain Page 5 4.3 SidewalklPathway Page 6 4.4 Private Utilities/Street Lights Page 6 4.5 Permits Page 6 5. Financing 5.1 5.2 5.3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 6 Opinion of Probable Cost Funding Right-of- Way / Easements Page 6 Page 7 Page 7 6. Preliminarv Schedule .... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. Page 8 7. Feasibility and Recommendation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 9 Appendix A ............................................................ Page 10 Figures Page 10 Appendix B ............................................................ Page 11 Prior Lake Layout - No.2 Page 11 Appendix C ............................................................ Page 12 Opinion of Probable Costs Page 12 Appendix D .... ,_ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. Page 17 Geotechnical Investigation Report Page 17 Feasibility Report City of Prior Lake, MN Rillg Road - Torollto Avellue to Tower Street S.A.P. No. 201-113-02 City Project No. 01-01 WSB Project No. 1283-00 ... II II UI 1. Executive Summary The Ring Road project includes the construction of street and utility improvements for the Ring Road, a Prior Lake Municipal State-Aid (MSA) roadway, from Trunk Highway (TH) 13 to Franklin Trail. This road is to serve as a "backage" road to TH 13 and will improve circulation and access to the surrounding commercial area. This proj ect includes that segment of the proposed Ring Road from Toronto Avenue to Tower Street. A map showing the project location is shown on Figure 1. The proposed improvements include the construction of Ring Road, a 42-foot wide urban collector street consisting of bituminous pavement and B-618 concrete curb and gutter with a 5-foot concrete sidewalk on both sides of the roadway, and a right-of-way width of60 feet. Utility improvements include extension of an existing sanitary sewer line for future use, extension of an existing watermain to provide a looped system, and storm sewer construction for the proposed roadway. The proposed improvement project cost is estimated to be $1,321,600, which includes a 10% contingency and 28% indirect costs. Funding for the project is to be provided from Municipal State Aid and City funds. The proposed project schedule shows completion of construction and restoration by October, 2001, depending on timely acquisition of the right-of-way. This project is feasible, necessary, and cost-effective from an engineering standpoint and should be constructed as proposed herein. Feasibility Report City of Prior Lake, MN Ring Road - Toronto Avenue to Tower Street S.A.P. No. 201-113-02 City Project No. 01-01 WSB Project No. 1283-00 Page 1 Iii I II f.-I 2. Introduction 2.1 Authorization On September 18, 2000, the Prior Lake City Council authorized the preparation of a Feasibility Report for the construction of one segment of Ring Road between Toronto Avenue and Tower Street. This project is anticipated to be designated as a State-Aid project. 2.2 Scope The proposed project consists ofthe construction of Ring Road from existing Tower Street to Toronto Avenue with connections to Maplewood Street and Duluth Avenue. This street is a combination of existing street and a new alignment between the intersection of Tower Street and Duluth Avenue, and the intersection of the new alignment of the Ring Road with Toronto Avenue. Proposed improvements also include the extension of sanitary sewer, watermain and storm sewer construction along Ring Road. Because of the probable designation as an MSA roadway, Ring Road must be constructed according to current State-Aid Standards. 2.3 Data Available In preparing this report, all or portions of the following sources of information were utilized: · City of Prior Lake layouts of Ring Road · City of Prior Lake Topographic Maps · City of Prior Lake Parcel Maps · City of Prior Lake As-Built Plans · Prior Lake Post Office plans prepared by C.M. Architecture, P.A. and VanSickle, Allen & Associates, Inc. · City Council Agenda Report dated March 6, 2000 regarding staff recommendations for alternatives to Ring Road ~ General Backfround 3.1 Project History The proposed Ring Road is designated to be a frontage or backage road to TH 13 and its main purpose is to take local commercial business traffic off of TH 13. The roadway is proposed to extend between TH 13 and Franklin Trail and is intended to Feasibility Report City of Prior Lake, MN Ring Road -- Toronto Avenue to Tower Street S.A.P. No. 201-113-02 City Project No. 01-01 WSB Project No. 1283-00 Page 2 I r 1 II fll provide continuous traffic flow through this commercial/business area. This project, when completed in its entirety, will eliminate several direct accesses to TH 13 and is consistent with Mn/DOT's TH 13 corridor study recommendations. City Staff previously presented various alternatives to the layout of Ring Road to the City Council and Layout No.2 was approved (See Appendix B). Due to funding concerns, the entire Ring Road project has been divided into three segments. The first segment includes the reconstruction and realignment ofCSAH 23 at TH 13, then extending to Tower Street. The third segment extends from Toronto Avenue easterly to Franklin Trail. This report addresses the second segment of the proposed Ring Road, from Toronto Avenue to Tower Street. This segment is included in the 2001 Capital Improvement Program (CIP). 3.2 Project Zoning The surrounding commercial areas include a hardware store, a bank, a proposed post office, and a mall. The City owns a parcel ofland at the northwest comer of Duluth Avenue and Tower Street, which is right-of-way property for Duluth Street. Areas to the south and east are zoned residential, as well as the area to the west along Maplewood Street. 3.3 Existing Conditions 3.3.1 jltreets Existing Duluth Avenue, Tower Street and Toronto Avenue generally have a 32-foot wide street section with concrete curb and gutter and concrete and bituminous walle The existing street's right-of-way varies from 60 to 66 feet in width. The general condition of the streets are fair to good. 3.3.2 jlanitary Sewer, Watermain Existing sanitary sewer and watermain run along Duluth Avenue, Toronto Avenue and Tower Street, serving adjacent businesses and residents. 3.3.3 Storm Sewer Drainage from Duluth and Toronto Streets are collected via storm sewer pipe along these streets and outlets into a wetland and storm,water pond located in the Enivid First Addition (north of Tower Street), then(outler;tnto a City owned wetland south of Tower Street, which eventually outlets irlto-a-ditch running westerly on the north Feasibility Report City of Prior Lake, MN Rillg Road -- Torollto AVeIlue to Tower Street S.A.P. No. 201-113-02 City Project No. 01-01 WSB Project No. 1283-00 Page 3 . j II 1:111 side of Tower Street, west of Duluth Avenue. This system outlets into a DNR owned wetland south of TH 13 and east of CSAH 23 and then eventually through a ditch system into Prior Lake. 3.3.4 Private Utilities Private underground utilities consisting of telephone, gas and electric are located along the Duluth Avenue, Tower Street and Toronto Avenue. It is anticipated that only minimal adjustments will be required to the existing private utilities. 4. Proposed Improvements 4.1 Streets and Storm Sewer (Figures 3, 4 ) a. Street: The propo~ed street improvements include the construction of Ring Road from the existing Tower Street just west of Duluth Street, curving onto Duluth Avenue and then extending easterly south of the Marquette Bank and the Priordale Mall to Toronto Avenue (Figure 3). Proposed street improvements also include new intersection alignments with the Ring Road at Duluth Avenue, Tower Street, and Toronto Avenue. b. Variance: Typical design curves for a proposed state-aid street follow a 30 mph design speed. In order to minimize the impacts to adjacent properties and acquiring right-of-way from the Marquette Bank (Area 5 on Figure 7), the proposed post office site (Area 6 on Figure 7), and the residential property adjacent to Tower Street (Area 7 on Figure 7), a variance was sought from MnlDOT for 25 mph horizontal design curves in these impacted areas. The variance was approved by the Mn/DOT's State Aid Variance Committee on December 20, 2000 and the proposed alignment reflects this variance. The variance was approved with the following conditions: · no parking allowed on the street · center left-turn lane required · right-turn lanes where feasible · any other Mn/DOT requirements · a hold harmless agreement Figure 6 shows pavement striping and turn lane locations. Feasibility Report City of Prior Lake, MN Rillg Road - Torollto Avellue to Tower Street S.A.P. No. 201-113-02 City Project No. 01-01 WSB Project No. 1283-00 Page 4 I 'i 1 I. r ., c. Storm Sewer (Figures 4): The proposed storm sewer improvements consist of IS-inch to 24-inch reinforced concrete storm sewer along the proposed Ring Road. The storm sewer system will be designed to intercept all the stormwater which flows south from the Marquette Bank/Priordale Mall Area. Presently this flows onto the proposed U.S. Post Office site and drains into a 36" storm sewer pipe which runs south under Tower Street to the City owned wetland. By building the Ring Road, this stormwater will be intercepted, and will end up at the above-mentioned wetland and ultimately to the wetland to the west on the north side of Tower, east and adjacent to Panama Street (eSAR 23). The entire storm drainage area will be considered 80% impervious for commerciallindustriallbusiness uses. The proposed storm sewer will be constructed in accordance with state-aid standards to serve the Ring Road right-of-way and any additional existing drainage areas. The storm sewer will be designed for a IO-year rainfall event. There may be additional runoff coming into the Ring Road storm sewer system from the proposed clinic site east of Toronto Avenue. Additional analysis should be done to determine the extent of this runoff prior to the final storm sewer design: therefore the final storm drainage design may vary from the design shown in this report. This additional analysis is beyond the scope of this feasibility study. Drainage at the intersection of Toronto Avenue and Tower Street will be accommodated through a proposed storm sewer pipe along the south side of Tower Street that is to be constructed with a development project on the southeast comer of Toronto and Tower Streets. The Ring Road is proposed to be constructed as a I O-ton urban commercial roadway, 42 feet wide with concrete curb and gutter, and five-foot sidewalks on both sides of the roadway, within a 60-foot right-of-way width. Based on the geotechnical investigation completed for the proj ect and S tate Aid standards, the pavement section will consist of approximately five inches of bituminous, eight inches of Class 5 aggregate base and 18 inches of select granular borrow. A typical section is included in Figure 2. A copy of the geotechnical investigation report is included in Appendix D. Feasibility Report City of Prior Lake, MN Ring Road - Toronto Avenue to Tower Street S.A.P. No. 201-113-02 City Project No. 01-01 WSB Project No. 1283-00 Page 5 In I II 111 4.2 Sanitary Sewer and Watermain (Figure 5) The proposed sanitary sewer improvements consist of an 8-inch PVC extension from the existing sanitary sewer line along Toronto Avenue, extending southwest along the proposed Ring Road, just south of the Priordale Mall and also extending northeast along the proposed Ring Road to serve a parcel south of the Ring Road. These improvements will accommodate any future redevelopment in the area. The proposed watermain improvements consist of extending an 8-inch DIP watermain along the proposed Ring Road connecting into existing watermain along Toronto Avenue and Duluth Avenue. This improvement will provide a looped system to the existing water system and will accommodate any future redevelopment in the area. The proposed improvements also includes extending the watermain northeast from Toronto Avenue along the proposed Ring Road to serve the parcel south of the Ring Road. 4.3 Sidewalk/Pathway A five-foot sidewalk on both sides of the roadway is proposed as part of the street construction. 4.4 Private Utilities/Street Lights Street lights for the improved streets will be provided in accordance with City Standards and State-Aid Standards. 4.5 Permits Several permits will be required as part ofthe proposed construction. The anticipated permits required and the respective regulatory agencies are listed below: · Minnesota Department of Health (MDH) ........... Watermain · Minnesota Pollution Control Agency (MPCA) . .. Sanitary Sewer · Minnesota Department of Natural Resources (DNR) '" Wetlands Feasibility Report City of Prior Lake, MN Ring Road -- Toronto Avenue to Tower Street S.A.P. No. 201-113-02 City Project No. 01-01 WSB Project No. 1283-00 Page 6 H 1 II Iill! 5. Financing 5.1 Opinion of Probable Cost A detailed opinion of probable cost is included in Appendix C of this report. The opinion of probable costs includes a 10% contingency and 28% indirect costs. The indirect costs include legal, engineering, and administrative costs associated with the project. The project costs are summarized as follows: Street Construction Option A $667,000 $131,100 $24,200 $49,300 $450,000 $1,321,600 Storm Sewer Construction Sanitary Sewer Construction Water System Improvements Right-of-Way Acquisition Total Estimated Project Cost 5.2 Funding Financing of the project will be provided through MSA funds and Trunk Reserve funds. The proposed funding breakdown is as follows: Option A Streets MSA $667,000 $72,100 Trunk Reserve Total $667,000 $59,000 $131,100 $24,200 $24,200 $49,300 $49,300 $0 $450,000 $132,500 $1,321,600 Storm Sewer Sanitary Sewer Watermain Right-of-Way Acquisition Total Option A $450,000 $1,189,100 Feasibility Report City of Prior Lake, MN Ring Road - Toronto Avellue to Tower Street S.A.P. No. 201-113-02 City Project No. 01-01 WSB Project No. 1283-00 Page 7 I ; i II ~11 5.3 Right-of-Way / Easements Approximately 83,151 square feet of right-of-way, comprising of seven parcels need to be acquired (Figure 7). Right-of-way acquisition costs for the seven parcels may range from $350,000 to $450,000 or more. Right-of-way costs can vary tremendously for public projects, depending on the willingness ofthe sellers, eminent domain procedures, etc. The proposed alignment may require acquiring a parcel (Area 3, Figure 7) of the Priordale Mall south of the Ring Road and west of Toronto Avenue if determined undevelopable. In order to avoid acquiring this area from the mall and allow a larger area south of the Ring Road to be developed, an alternate road alignment was developed as shown on Figure 8. This alternate allows right-of-way acquisition from the mall to be comprised only of the Ring Road right-of-way limits (Area 2, Figure 8). Feasibility Report City of Prior Lake, MN Rillg Road - Torollto Avellue to Tower Street S.A.P. No. 201-113-02 City Project No. 01-01 WSB Project No. 1283-00 Page 8 I ! r II rllT 6. Preliminary Schedule In consideration of the effort required to complete the project as presented, the following preliminary schedule is proposed. This schedule may be revised as the project progresses. City Council Accept Feasibility Study/ Authorize Preparation of Plans and Specifications ................. March 19, 2001 Right-of-Way Acquisition (By City) . . . . . . . . .. . . . . . . . . . . . . . . .. March - July, 2001 Plan/Specification Preparation and MnlDOT Approval ............. April-May, 2001 City Council Approve Plans and Specifications and Authorize Advertisement for Bids ............................... June, 2001 Receive Bids ................................................... July, 2001 Award Contract ................................................. July, 2001 Completion of Street Construction and Restoration .................. October, 2001 Note: Ifno special assessments are utilized, a formal, legal public hearing is not required. The Council may want to obtain public input through a more informal neighborhood meeting process. The right-of-way acquisition is essential for this project to get completed in 2001. This item has the potential to delay the construction of the project until 2002. Feasibility Report City of Prior Lake, MN Ring Road -- Toronto Avenue to Tower Street S.A.P. No. 201-113-02 City Project No. 01-01 WSB Project No. 1283-00 Page 9 1fT 1 II III 7. Feasibility and Recommendation The Ring Road proj ect consists of the construction of street, and utility improvements for Ring Road from Toronto Avenue to Tower Street. The total cost ofthe project is estimated at $1,321,600, including right-of-way acquisition costs. The project is feasible, necessary and cost-effective from an engineering perspective, and WSB & Associates, Inc. recommends construction ofthe proposed improvements as detailed in this report. Feasibility Report City of Prior Lake, MN Ring Road -- Toronto Avenue to Tower Street S.A.P. No. 201-113-02 City Project No. 01-01 WSB Project No. 1283-00 Page 10 . c~ I II !Il Appendix A Figures Feasibility Report City of Prior Lake, MN Rillg Road -- Torollto Avellue to Tower Street S.A.P. No. 201-113-02 City Project No. 01-01 WSB Project No. 1283-00 In 1 I. 1111 i \=IF I I / I I hail "W " IT ~c- I ~ 1!J!; fi-!!jJj .~ c- /c ~~ ~ f;= T,~~ tifi!1 == '\;hmrrrrmrnUIIIIIIIIIIIII LL I-H II"" ---p::j--f~~ - lL1JJ.]!JJJIJ]J1I11111I11 I r W " II II11 i II 11m I-t-::JJ! IA>~ II H" III / 1::---0 Co R ~ i-- r-i. m ~ omnml J-l L II IIIIIIIIIIIIIII/V. D 2 ~ ""<i/PJ flInJ I I II f- '- I-- J ~l~ R~ I -p- - F E ~ ~~N ~~'~I~C I~' l(jn\~ 11 '-' ~ mom ~ vV - ) rurnOJDJDJOJP ill Jill , ~ 0 F y~OOOTT\\\\IL-,- ~I r d II q.j .J> 0 0? '" = == D~ 0 ~t</j~ v tJ' \) L ~ Bf~J 00 ~~o v 1 ~f) ~ ~ rih ~7T~~~,d\l>-'l \" '6 ~\ r~~~t.L C/ ~\;//12 -(rrpLlJC::~~ \~~ / ~ f- 6' I ~ ~ I TTf ~C]~' t>-\~ l,,~;ff? ~ -", L n~ ~ 1l & ~ S ) ;(<t#t \ P ~-9T......~ fI 'Y' o. DOD '1 GbJ I >> Df-lPl~Y ~!S:'- ~ u ~ ~=8 ~ fTT \ \ '--1 ~/\\ \ =r "U tr r ~~ '\ \c:,\ Icd!;: <J]f;cg III I _1.-.1 /' , () D, ~ <J."I'Y a ~Q .0"", PROJECT LOCATION yt:=~~ 'ir- l- f-- ""-.f- I- "- - >-- "- - '--' "- --1~ f- ~ '<..() ~ ::::::;J J f- ~ n--n J- ~~ jJ::j~"- ~)- = Cl- ~ ~ v I ~ t c '" -" () LL ./ VJ o Q) - LL ./ N o o r<) 00 -~ ./ E ~ I o 500 1000 ... WSB 4150 Olaon Memorial Highway Suite 300 Minneapolis, MN 55422 Project Location WSB Project No. 1283-002 Dale: March 19, 2001 &..4_.., Jrrc. 783-541-4800 FAX 763-541-1700 Ring Road Prior Lake, Minnesota Figure Number 1 .~I-.nn.!II._..-_~..._ i.!I.......r.. III I II nil R/W 1 ' I.. 5' -I- 3' -I- 2.0% - C D' U N , l? LL /" III o Q) LL /" N o o r0 00 ~ /" E . WSB cI Associote&. lnc. CONCRETE WALK 4150 Olson Memorial Highway Suite 300 Minneapolis, MN 55422 .'I~--"-_--.J__ 011.......-. 763-541-4800 FAX 763-541-1700 HI r 21/2" 2350 TYPE LV 3 WEARING COURSE. CLVWE35030Cl 2357 BITUMINOUS TACK COAT 21// 2350 TYPE LV 3 WEARING COURSE. (LVWE35030Cl 8" CLASS 5 AGGREGATE BASE (100% CRUSHED LIMESTONE) 18" SELECT GRANULAR BORROW (OPTION Al INSET A 30' rt R/W 30' 42' F-F _I_ 3 ' -I" 5' -I 4 . 0"1. 2. 0"1. 1 ' B618 CURB AND GUTTER _2.0"1. 2.0% -- CONCRETE WALK~ FINISHED rt AS SHOWN IN PROFILE SEE INSET A RING ROAD Typical Section WSB Project No. 1283-002 Date: March 19, 2001 Ring Road Prior Lake, Minnesota Figure Number 2 I II U"II j ~ 0 100 200 - - - - - - WSB project No. 1283-002 Dale: March 19, 2001 - Figure Number 3 L i [ I I : L I ~ --- I I I I I I I I I I ! 1--- I I ------1 I I I I ~--- I I I I I I -i I I~ ~ <- \ -~ I I I / I / -1// r -.J I I '- , II '-,- \1 r v I,' ! 'I t .' ,/ l/I/ // /.~ ;j' , // // /.~ // ' // ~/,~/ // </ //.' // /" " ,/"/,, ~// '/ , .- ~~ ROADWAY o _ _ _ _ _ _ _ _L ------------~----- I I I I I I I I I I [__l_ ---------,------ I I I I I I I I I I .. -- .. --- --:::. :::---::::::.:.:=:- =-- .... ..../ ----~ ../ ,;:;.-:--..-- -:/' l-- -- '" IJl w > 00( o I- Z o a: o I- I I I I I I I ----------T-i I I \ I I L PROPOSED II: ROADWAY I I I I I I I I I I I I I I ~-=...--- --------__ ____1- sf. --~-- - - - T r- POST OFFICE / --~ / / / / / '\ \ / \ / \ / / '\ \ \ \ '\ \ \ \ '\ ) S> o Alignment Ring Road Prior Lake, Minnesota Overall , 4150 Olson Memorial Highway Suite 300 Minneapolis. MN 55422 763-541~ FAX 763-541-1700 . WSB &: ~e~. 1rtC. C 0' o ") , ;2 :> III o OJ ". ~ - 1 - - Street and Storm Sewer Construction Ring Road Prior Lake, Minnesota i ( <<-<<-<<-<<-<<-<< ~ ~ . \' --------"'---' 11 I I I I I I I I I I I I ~.!, I I I I I I i MALL 18" RCP ------------------ RCP v 300'R. REPLACE DRIVEWAY RCP v \ \ \ \ \ " \ / " \' " \ / \ / \ ,,/ \ / \ / \ / \ " \ / \ \ \ \ I \ I \ I \\ 15" R,fP - \ I \ I \ I -------"-~------ -----------------~----- CONNECT TO EXISTING STORM SEWER /' / / /' /' /' /' /' /' /' /' /' /' /' /' /' / \//' ))/), /' / \ /' /' \_"/ / \ \ \ \ \ \ \ \ \ Dale: March Figure Number 4 o 1283-002 wsa project No. 4150 Olson Memorial Highway Suite 300 Minneapolis, MN 55422 763-541~ FAA 763-541.1700 ~ ~ i ~ 0 50 100 - - - - - - WSB project No. 1283-002 Dale: Marth 19, 2001 - Figure Number 5 CONNECT TO EXISTING WATERMAIN CONNECT TO EXISTING SANITARY SEWER - ..-- --- ...... -- ../......",- /"; ; - - - -- - - ;; -- ..- /" ..- I I I I I I I I I I I I I I I I I I I I I I I I I I i I I I I I /_----- I V T- : I"pve "/ /;, _ /- ____----- _ _::-:: --'L -=-_ _ :- _ >-- _ PVqANITAIiy SANITARY SEWER i1 / i _ _ ~ _ __ _ _ _ __ SEWER: SERVICE y _ _ _ 1 _ _ _ _ _ ( II (fYP.) / I -- I _/_ " ------- , i ~ I I I :: I w V> W > <( ~ I I \ MALL v 6" nIPWATERMAIN SERVICE (TYP.) ,/ y 8' ~ ~ I I Watermain and Sanitary Sewer Construction Ring Road Prior Lake, Minnesota CONNECT TO EXISTING W ATERMAIN . 4150 Olson Memorial Highway Suite 300 WSB Minneapolis, MN 55422 763-541-4800 cI: ADOCiate~. Inc. FAX 763-541-1700 , SE )f t ,----- I I I I l------ I \ MALL -------------11 I I - / I --~ I -- .- [ ----_ I[ I ---_ I I I --'--I I [ I ~-~--------- [ - - ----~~~~----- --------------~ --T- I \ \ \ \ \ \ \ \ - r- POST OFFICE / / \ / ---~~------ v ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ / ~ \ \ \ ~ \ ~ ~ \~ ~ \ ~ / '\ \ \ \ \ '\ y/), '\~ ~~~ ~~ \ --/- \........ /-- ~ ~ 20 Dale: March 6 1283-002 WSB Projec1 No. Ring Road Prior Lake, Minnesota 4150 Olson Memorial Highway Suite 300 Minneapolis, MN 55422 763-541-4800 FAX 763-541-1700 LEGEND - AREA 1 - 9.753 SQ. FT. AREA 2 - 2B.007 SQ. FT. R_, AREA 3 - 24.35B SQ. FT. AREA 4 - 7.510 SQ. FT. AREA 5 - 11.670 SQ. FT. AREA 6 - BOB SQ. FT. AREA 7 - 1.045 SQ. FT. TOTAL AREA - B3.151 SQ. FT. Y 1..- I 0 100 200 WSB project No. 1283-002 Dale: Marth 19. 2001 Figure Number 7 L i [ I I : [ I ~--- I I I I I I I I I I I r--- - I I I I I I I ~--- I I I I I I -1 I I~ ~ <- I ~~ \ \ I I I / I / I / / r --1 I I " I, ' :1 r '\ v U I ~~--- L 1/ J ' ;/ ; Iii , ' I I' / /1 /' ' , /,/ / ' /",/j h' // /,'//',/ /.'/ Y ~-://'/// __ _.-- --:::: ..... ..J" ~ ___:..----- /' I ....;. - -....... - / ,.o"" ------------ - /':/'" /' 1./ - -.::-::-':=;'; -::-::: ;;-- , ~/- -;/' ------------,---- I I I I I I I I I I ~- - - ~ - o I , I --' __ II I _~~ II I ___ II I - J.I I I I ~~-------- I sE. --- I ____ I POST OFFICE /' \ /' ,,/'/' \ /' \ /' '(/'/' \ \ \ / ( ~ \ '\ j / _ _ _ _ _ _ _ _L _ _ _ _ _ ---------,------ I I I I I I I I I Right-oC-Way Acquisition Map Ring Road Prior Lake, Minnesota l---- ~~~ - - T o 4150 Olson Memorial Highway Suite 300 Minneapolis. MN 55422 763-541-4800 FAX 763-541-1700 ) \. .. WSB & Anociak', I"", :;, ~ , 2 L / II ~ " / " ::l ::l ') o " / E 20 i t WSB Project No. 1283-002 Figure Number 8 5T -1----- I 1 I 1 I l------ \ MALL Ring Roal Prior Lake, Minnesota 300 --, I _-'I I I _/ I I I \ \ \ \ \ \ \ \ \ POST OFFICE \ \ \ \ \ r -------------~--~----- \ / ----~~------ v /' /' /' /' /' /' /' /'/'/' /'/'/' \ /' /' \' \ /' /' /' /' /' /' /' /' /' \/' /' '\/' /'/'/'/' \ ",,/"/'"- \.--- -- -- /' Y/,/,/,)\ /' /' /' 4150 Olson Memorial Highway Suite 300 Minneapolis, MN 55422 763-5011-4800 FAX 763-541-1700 /' /' /' /' /' /' :;, J J 2 n J u " J ) 1 J " / Appendix B Prior Lake Layout - No.2 Feasibility Report City of Prior Lake, MN Ring Road - Toronto Avenue to Tower Street S.A.P. No. 201-113-02 City Project No. 01-01 WSB Project No. 1283-00 I I 1 11 I II ~.z tI1 ';':::li';'!~,:j'i~::;i;;. .. II r~~ \~~ ~~ . a-l .- - .' ( -\,- . .~ :~I :. LLr \~' \8;': ~ \- 'J~ III Appendix C Opinion of Probable Costs Feasibility Report City of Prior Lake, MN Ring Road - Toronto Avenue to Tower Street S.A.P. No. 201-113-02 City Project No. 01-01 WSB Project No. 1283-00 IT! r 11" r 11 City of Prior Lake, MN Feasibility Report Rillg Road - Torollto Avellue to Tower Street WSB Project No. 1283-00 Cost Opinioll Schedule A - Street Construction I I Item Descriptioll I Unit , Qty Unit Cost Extended Cost i -,--- 1 I Mobilization LS 1.00 $15,000 $15,000 ! ... --~------- 2 Clearing and Grubbing ACRE 1.00 $2,500 $2,509_ 3 I Remove Bituminous Pavement SY 7,100.00 ! $2.00. $14,200 , 4 Remove Curb & Gutter LF 2,500.00 $1.50 ! $3,750 5 Remove Walk SF 7,650.00 $1.00 i $7,650 --,_.._- 6 Remove Concrete Median LF 50.00 I $50 $1.00 : 7 Remove Sewer Pipe (Storm) LF 525.00 $8.00 ! $4,200 "------,--- 8 I Remove Manhole or Catch Basin EACH 8.00 $200.00 ! $1,600 --_._~- - J 9 Sawing Bit Pavement (Full Depth) LF 160.00 $3.00 $480 10 Subgrade Excavation CY 12,700.00 $7.00 $88,900 11 Select Granular Borrow CY 8,000.00 $10.00 $80,000 - 12 Aggregate Base Class 5 TON 5,750.00 $8.00 I $46,000 --..- -- _--0 ____ .-------1---- ----- I 13 Bituminous Mixture TON 3,230.00 ! $35.00 : $113,050 ! .-~---~----_. -----."--- ----~._- -..-. ---- ---~._---+-----~._--- ----- 14 Bituminous Material for Tack Coat GAL 620.00 ! $1.50 $930 15 Concrete Curb & Gutter Design B618 LF 4,400.00 $7.00 $30,800 16 Traffic Control LS 1.00 $2,000.00 $2,000 17 Concrete Walk SF 19,700.00 $2.00 $39,400 18 Concrete Median SY 25.00 $20.00 $500 ------- --- 19 F&I Sign Panels Type C SF 60.00 $25.00 $1,500 20 F&I Sign Panels Type D EACH 3.00 $100.00 $300 21 4" Solid Line White-Epoxy LF 4,200.00 $0.50 $2,100 22 4" Double Solid Line Yellow-Epoxy LF 2,100.00 $1.00 $2,100 23 Silt Fence, Type Heavy Duty LF 200.00 $3.00 I $600 i -- ------ '-~---.----'-'.- 24 ; Seeding ACRE I 1.00 $1,Q9~~00 I $1,000 I ~- I I ~._- 25 i Sodding SY 2,050.00 $2.50 $5,125 ~ I 26 ! Street Lights EA 4.00 $2,500.00 $10,000 Subtotal $473,735 +J 0% Contingency $47,374 Subtotal : $521,109 +28% Indirect Costs: $145,910 Total Street Construction i $667,019 Feasibility Report City of Prior Lake, MN Ring Road - Toronto Avenue to Tower Street S.A.P. No. 201-113-02 City Project No. 01-01 WSB Project No. 1283-00 . T I I r II City of Prior Lake, MN Feasibility Report Ring Road - Toronto Avenue to Tower Street WSB Project No. 1283-00 Cost Opinion Schedule B - Storm Sewer Item Description Unit I Qty ! Unit Cost . Extended Cost ! , I I 1 15" RC Pipe Sewer Design 3006 CL V LF I 660.00 I $22.00 $14,520 I --_.~_._----~-- -- 2 i 18" RC Pipe Sewer Design 3006 CL III LF I 850.00 $25.00 $21,250 I t------ , ! 21" RC Pipe Sewer Design 3006 CL III I ,-.- 3 LF 260.00 $26.00 : $6,760 I , --'--.....-......,----_._~------ I -' -r---~-- 4 I 24" RC Pipe Sewer Design 3006 CL III LF 310.00 $35.00 i $10,850 t-----~+--- , --.----. --------- 5 I Connect to Existing Storm Sewer Each 3.00 ! $500.00 $1,500 6 Construct Drainage Structure Design Special- 2'x3' Each 8.00 $900.00 i $7,200 7 Construct Drainage Structure Design 48-4020 Each 9.00 $1,500.00 $13,500 ---- 8 Construct Drainage Structure Design 60-4020 Each 6.00 $2,000.00 $12,000 - 9 Salvage & Reinstall Apron Each 1.00 $400.00 $400 10 Casting Assembly Each 17.00 $300.00 $5,100 Subtotal $93,080 +1 0% Contingency $9,308 Subtotal $102,388 +28% Indirect Costs $28,669 Total Storm Sewer $131,057 Feasibility Report City of Prior Lake, MN Ring Road - Toronto Avenue to Tower Street S.A.P. No. 201-113-02 City Project No. 01-01 WSB Project No. 1283-00 1 II III City of Prior Lake, MN Feasibility Report Ring Road - Toronto Avenue to Tower Street WSB Project No. 1283-00 Cost Opinion Schedule C - Sanitary Sewer Item i Description i Unit i Qty Unit Cost i Extended Cost I ! I I $500.00 i 1 Connect to Existing Sanitary Sewer Each 2.00 $1,000 I ,- 2 8" PVC Pipe Sewer LF 460.00 $18.00 i $8,280 I Construct Sanitary Manhole I i 3 I LF 25.00 $170.00 i $4,250 i -- 4 ! Casting Assembly : Each 1.00 I $300 I $300.00 i r."--r ------,-- 5 Adjust Frame & Ring Casting Each 3.00 $200.00 $600 ..- 6 6" PVC Pipe Sewer LF 140.00 $17.00 $2,380 7 8"x6" PVC Wye Each 4.00 $100.00 $400 Subtotal : $17,210 +10% Contingency; $1,721 I Subtotal I $18,931 +28% Indirect Costs $5,301 Total Sanitary Sewer $24,232 Feasibility Report City of Prior Lake, MN Rillg Road - Torollto Avelme to Tower Street S.A.P. No. 201-113-02 City Project No. 01-01 WSB Project No. 1283-00 I i r I I. III City of Prior Lake, MN Feasibility Report Ring Road - Toronto Avenue to Tower Street WSB Project No. 1283.00 Cost Opinion Schedule D - Watermain Item Description ! Unit I Qty Unit Cost · Extended Cost I. I 1 : Connect to Existing 8" Watermain I Each 2.00 $500.00 ; $1,000 i 2 6" Gate Valve and Box Each 3.00 $450.00 I $1,350 -- I . , 3 i 8" Gate Valve and Box Each 3.00 $650.00 $1,950 ! ---.-.-- + --------~- ---_.~,-------,._- -- -- .1 4 . 6" Watermain -- Ductile Iron Class 52 I LF 215.00 $18.00 $3,870 e .....----.----- - -~------- .',--- no. -- ~- I .---------.--- I 5 , 8" Watermain -- Ductile Iron Class 52 I LF 1,020.00 $20.00 : $20,400 --~ ~'__'___n..___ '_n 6 Hydrant Each 3.00 $1,400.00 $4,200 7 Ductile Iron Fittings LB 1,500.00 $1.50 $2,250 Subtotal $35,020 I I +1 0% Contingency : $3,502 Subtotal I $38,522 I +28% Indirect Costs $10,786 Total Watermain $49,308 Summary Schedule A - Street Construction $667,019 Schedule B - Storm Sewer $131,057 Schedule C - Sanitary Sewer $24,232 Schedule D - Watermain $49,308 Total Estimated Project $871,616 Feasibility Report City of Prior Lake, MN Ring Road - Toronto Avenue to Tower Street S.A.P. No. 201-113-02 City Project No. 01-01 WSB Project No. 1283-00 II" fJ1' Appendix D Geotechnical Investigation Report Feasibility Report City of Prior Lake, MN Ring Road - Toronto Avenue to Tower Street S.A.P. No. 201-113-02 City Project No. 01-01 WSB Project No. 1283-00 . . r 1 II [lj . STS Consultants, ltd. Solutions through Science & Engineering November 21, 2000 City of Prior Lake c/o Ms. Shibani Khera WSB & Associates, Inc. 8441 Wayzata Boulevard, Suite 350 Minneapolis, MN 55426 Re: Subsurface Exploration and Geotechnical Engineering Analysis for the Proposed Ring Road Street and Utilities Between Toronto Avenue and Tower Street in Prior Lake, Minnesota; STS Project 97973 Dear Ms. Khera: We have performed a limited subsurface exploration and geotechnical engineering analysis for this public improvement project. The attached report contains the logs of four soil borings, an evaluation of the conditions encountered in the borings, and our recommendations for underground utility line installation, pavement subgrade preparation, and parameters for design of the bituminous pavement. We appreciate the opportunity to work with the City of Prior Lake and WSB on this project. If you have any questions about our recommendations, please call us at 763/315-6300. To arrange for our testing services during the construction phase of this project, please call me or Mr. Steve Ruesink, P .E., at the same phone number. Sincerely, STS CONSULTANTS, LTD. ~~ Mervyn Mindgs, P .E. Senior Project Engineer :""-"1 ~~~4~~-~ James H. Overtoom, P.E. Principal Engineer/Vice President MM/dn Encs. C697300I.DOC 10900 73rd Avenue North, Suite 150 ~ Maple Grove; MN 55369-5547 . (763) 315-6300 . (763) 315-1836 Fax . ~ l' . I 11" I, 1/ 3.0 4.0 5.0 TABLE OF CONTENTS 1.0 Proj ect Overview ........................................ ................. ......... .......... .................... 1.1 1.2 Proj ect Description ......... ....... .......... ...... .................... .... ............... ........... Project Scope and Purpose .. ..... ............. ........... ...... .......................... ....... 2.0 Exploration and Testing Procedures ................................................................... 2.1 2.2 2.3 2.4 Boring Layout and S,urvey Procedures ................................................... Groundwater Measurements and Borehole Abandonment ..................... Laboratory Testing, Procedures ............. ............. ............. ............... ......... Boring Log Procedures and Qualifications ............................................. Exploration Results ... ................... ........... ...... .............. ....................... ........ .... ..... 3.1 " ? J._ " ? J._ Site and Geology ..... ......... ........... .......... ............. ........... ............... ...... ..... Soil Conditions ...... ...... ..................... .... ..... ..... ........................................ Groundwater Conditions .... ..... .............. ............ ....... ....... ........................ Analysis and Recommendations .... ..................... ....... ................. ........................ Page No. 1 1 1 2 2 3 3 .., J 4 4 4 5 6 4.1 Discussion .... ......................... ..... ....... """ ......... .......... ..... ........ ................ 6 4.2 Recommendations ........... ~..... '" ............ ......... .... ...... ............... ................. 6 4.3 Construction Considerations ................................................................... 7 4.4 Winter Construction .. ......... ...... ........... ........... ......... ................................ 7 4.5. Construction Safety ...... ........................ ......... ....... ..... .............................. 8 4.6 Field Observation and Testing ...................... .......................................... 8 4.7 General Qualifications ............................................................................ 8 Standard of Care ................ ....... ..... ......... ......... .......... ......... .... .............. .............. APPENDIX R697300I.DOC . ~~ 1 II 9 [II Ring Road Streets and Utilities Project STS Project 97973 2.0 EXPLORATION AND TESTING PROCEDURES 2.1 Borin~ Layout and Soil Samptin~ Procedures The civil engineer recommended the number of borings and selected the soil boring locations. STS recommended the boring depths. A WSB survey crew staked the borings and provided surface elevations to National Geodetic Vertical Datum. We drilled the borings on October 12, 2000 with a truck-mounted Diedrich D-50 drill rig operated by a two person crew. The drill crew advanced the borings using continuous flight hollow stem augers. Detailed descriptions of typical drilling procedures are included in the Appendix. Drilling methods, depths, casing usage, drill rig type, foreman, and other drilling information are indicated on the boring logs. The drill crew sampled the soil in advance of the auger tip at 2.5 foot intervals of depth to 10 feet and at 5 foot intervals thereafter. The soil samples were obtained using a split-barrel sampler which was driven into the ground during standard penetration tests in accordance with ASTM D-1586, Standard Method of Penetration Test and Split-Barrel Sampling of Soils. An explanation of typical STS drilling and sampling procedures is presented in STS Field and Laboratory Procedures in the Appendix. Recovered soil samples were described on field logs, containerized, labeled and transported to our laboratory for further examination and testing. The field logs also document sample intervals, test data, observations of drilling resistance, groWl,dwater occurrence and other pertinent conditions. ,'\',:' -2- 1 II III Ring Road Streets and Utilities Project STS Project 97973 3.0 EXPLORATION RESULTS 3.1 Site and Geology The topography along the proposed Ring Road alignment slopes from the southwest upward toward the northeast. There was approximately a 20 foot difference in elevation between our southwesterly and northeasterly borings. The principal naturally occurring soil types in this area are a relatively thin and discontinuous upper layer of lean sandy clay glacial till deposited by the Des Moines ice lobe of the Wisconsin glaciation, underlain by sand of varying gradation. 3.2 Soil Conditions The area of the proposed roadway has been extensively filled, and we found from 9 to 12 feet of fill in our four borings. The fill consisted of an irregular mixture of sandy clay, clayey sand, fine to coarse sand, traces of black organic topsoil, and one layer of crushed rock. Standard penetration N-values in the fill ranged from 29 to 6, and tended to decrease with increasing . depth. This indicates that the upper portion of the fill was compacted, whereas the lower portion probably was not. Below the fill at borings 2 and 4, we found a 1.7 to 6.3 foot thick transitional layer of stratified silt, sandy silt, silty clay, and fine sand. Standard penetration N-values in this alluvial formation range from 4 to 11, representative of a loose to medium dense condition. Between the 9 and 13 foot depths in boring 4, and below the 15-1/2 foot depth in boring 2, we found layers of lean sandy clay glacial till having firm to stiff consistency. -4- ., r I II In Ring Road Streets and Utilities Project STS Project 97973 ( The major underlying soil stratum at this site commenced at depths of 9-112 to over 20 feet below ground surface. This is a variably graded sand consisting of silty fine to medium sand, fine to medium sand, and fine to coarse sand with gravel. Boring 2 did not extend deep enough to intercept the underlying sand fonnation. Standard penetration N-values in the sand ranged from 6 to 18 within the depth range explored. Most of this sand was medium dense, although the upper portion of the sand at boring 1 was loose. 3.3 Groundwater Conditions We observed free groundwater in all four borings while drilling. In borings 1 and 2, at the southwesterly end of the project, the water levels were at depths of 6 to 15 feet below ground surface, corresponding to elevations 942.9 to 940.8 feet. At borings 3 and 4, in the northeasterly half of the project, the observed groundwater levels were at depths of 3.8 to 14 feet below ground surface, corresponding to elevations 954.2 to 954.3 feet. Unnamed ponds southwest, south, and east of the site have average summer water elevations of 940, 956, and 945 feet, respectively. Prior Lake is approximately 3500 to 3800 feet to the northwest, and has an average summer water elevation of 899 feet. Our interpretation of these data is that the observed groundwater levels in the borings represent perched groundwater conditions. The groundwater is evidently retarded from further downward percolation by low permeability clay lenses at depths. The perched groundwater levels at this site will fluctUate seasonally and annually, depending primarily on precipitation and climatic conditions. The shallow perched groundwater which we found at two locations will probably be encountered in utility trench excavations, requiring some dewatering. - 5 - . -r r 11 il r ~ Ring Road Streets and Utilities Project STS Project 97973 4.0 ANALYSIS AND RECOMMENDATIONS 4.1 Discussion The existing fill at borings 1 and 2 is generally a poor quality material, and should be partially subcut from below the pavement subgrade. The lower portion of the fill does not appear to have been adequately compacted. Thus it will be necessary to subcut below utility line invert elevations, and add at least a 1.5 foot thiclrness of pipe bedding. Some dewatering will be required for utility line installation. 4.2 Recommendations When the utility trench excavations are made, the trench base should be probed with hand augers and manual penetrometers. Where soft or loose soils are encountered, the trenches should be subcut to at least 1.5 feet below design invert elevation, and the subcut replaced with granular bedding conforming to MnDOT 3149.2.F or aggregate bedding conforming to MnDOT 3l49.2.G. Some groundwater intrusion should be expected in portions of the utility trenches. Where this occurs, the water should be removed by pumping. Well point dewatering may be feasible, but the well points would probably have to be installed in oversized holes, and surrounded by reverse filter aggregate. The soil backfill above the crown of the utility pipes could consist of on-site inorganic soils. Sandy soils should be placed in 8 to 10 inch lifts and compacted to 100% Standard Proctor dry density, ASTM D-698. If sandy clay fill is used, it should be moisture conditioned to within -6- .. r . II fll Ring Road Streets and Utilities Project STS Project 97973 :t3% of the optimum moisture content, and compacted to 95% of the maximum Standard Proctor dry density. The uppermost 3 feet offill below design subgrade elevation should consist of sand or silty sand. Clay fill should not be used within this upper zone. In the section of roadway encompassing borings 3 and 4, the pavement sub grade will consist of good quality sand. This should be surface compacted. In the section o~ roadway encompassing borings 1 and 2, clay fill soils exist. These areas should be subcut to at least 2.5 feet below design subgrade elevation, and replaced with compacted sand fill. Two representative samples of subgrade soil were submitted to the MnDOT materials laboratory for stabilometer R-value tests. The test results are appended. On the basis of these tests, we recommend that an R-value of25 should be used for the pavement thickness design. 4.3 Construction Considerations Utility trench bases, particularly in the southwesterly half of the project, should be checked for adequacy prior to placing the pipe bedding material. Provision should be made for some subcuts along portions of the trench alignment. Perched groundwater is likely to be encountered at some locations. Provision should be made for dewatering as appropriate. Under no circumstances should fill be placed into standing water. 4.4 Winter Construction Only unfrozen fill should be used. Placement of fill should not be permitted on frozen soil, because excessive post-construction settlement could occur as the frozen soils thaw. - 7 - . ~~ . II fl1 Ring Road Streets and Utilities Project STS Project 97973 4.5 Construction Safety All excavations must comply with the requirements of OSHA 29 CFR, Part 1926. Subpart P "Excavations and Trenches". This document states that excavation safety is the responsibility of the contractor. Reference to this OSHA requirement should be included in the job specifications. The responsibility to provide safe working conditions on this site, for earthwork, underground utility line installation, or any associated operations is solely that of the contractor. This responsibility is not borne in any manner by STS Consultants, Ltd. 4.6 Field Observation and TestinJ?; We recommend that the bases of underground utility trenches should be observed and tested by a geotechnical engineer or qualified engineering technician to determine if the soils are adequate to support the utility pipes without excessive settlement. Fill placement and compaction should be monitored and tested to determine that the resulting fill conforms to specified density requirements. STS would be pleased to provide the necessary field observation, monitoring and testing services during construction. 4.7 General Qualifications TIns report has been prepared to aid in the evaluation of the Ring Road utilities and pavement at this site. and to assist the civil engineer in the design of this project. The scope is limited to the specific roadway section described herein, and our description of the project represents our understanding of the significant aspects relative to soils. In the event that there any changes in the grade or location of the roadway, the opinions and recommendations contained in this report shall not be considered valid unless STS reviews these changes and modifies or- verifies the recommendations in writing. - 8 - .!! r II HI Ring Road Streets and Utilities Project STS Project 97973 5.0 STANDARD OF CARE The recommendations and opmlOns contained in) this report are based on our professional judgment. The soil testing and geotechnical engineering services performed for this project have been conducted in a maImer consistent with that level of skill and care ordinarily exercised by other members of the profession currently practicing in this area under similar budgetary and time constraints. No other warranty, express or implied, is made. - 9 - . f! 1 II III APPENDIX 1. STS Changed Condition Clause 2. Boring Location Diagram 3. Boring Logs 4. STS General Boring Log Notes 5. STS Soil Classification System 6. STS Field and Laboratory Procedures Subsurface Exploration Procedures Sampling Procedures Laboratory Index Test Procedures 7. R-value Test Results 8. STS Standard Boring Log Procedures 9. ASTM Specification D-1586 10. STS Subgrade Protection Guideline II. STS Subgrade Stabilization Guideline 12. STS Earthwork Guideline I, r 1 II n II STS Changed Conditions Clause ~ DIFFERING SITE CONDITIONS The following is a suggested standard clause for unanticipated subsurface conditions: The owner had a subsurface exploration and testing program performed by a geotechnical consultant. The results of this program are contained in the consultant's report. The consultant's report presents conclusions on the subsurface conditions based on their interpretation of the data obtained in the exploration. The contractor acknowledges that they have reviewed the consultant's report and any addenda thereto, and that their bid for earthwork operations is based on the subsurface conditions, as described in that report. The contract parties recognize that a subsurface exploration does not disclose all conditions as they actually exist and further, conditions may change, particularly groundwater conditions, between the time of subsurface exploration and the time of subsurface construction operations. In recognition of these facts, this clause is made part of the contract and provides a means of equitable additional compensation to the contractor if adverse unanticipated conditionS are encountered and found to be materially different than reasonably expected as represented in the contract documents. If at any time during earthwork, paving, foundation, and underground construction operations, the contractor encounters conditions that they consider to be materially different than those anticipated by the geotechnical consultant's report, contractor shall promptly and before such conditions are disturbed notify the owner's representative in writing of the condition and shall explain: (1) how subsurface or latent physical conditions at the site differ materially from those indicated in the contract, or, (2) what unknown physical conditions were encountered that are of an unusual nature and differ materially from those ordinarily encountered and generally recognized as inherent in work of the character provided for in this contract. The owner's representative will promptly initiate an investigation of the alleged differing site conditions. The contractor will provide access to the conditions and fully cooperate with the investigation. Upon completion, the owner's representative will issue a findings report with a recommendation on merit. Conversely, if owner's representative observes subsurface conditions which are different than those anticipated by the foundation consultant's report, he will also promptly notify the contractor. If a differing site condition claim has been found to have merit, negotiations will commence between the owner and the contractor to arrive at an equitable change in contract price for the necessary additional work or for reduction in work because of the unanticipated conditions. The contractor agrees that unit prices listed in the bid are applicable in computing equitable adjustments for additional or reduced work under the contract. For changed conditions for which unit prices are not listed, the additional work will be paid for on a time and material basis. n 1 II III +E;; to c;':l I t>:I ~~ to a ::t:l ~ c;':l t-< a ~ ::2 a :;;:: ~i: - 0 Z 0 ..., . CTl CTl '" .... 0 o I, b ~ ./1 /. 14'''''TI~-' - ~' J - ~ I I c:::::::J c::::::::::J I c::::::J ~~ '" g~~ ![I~! l! ~JI DIt~a'\'l o.lt: DArtt floC 11/J'l1JOOl DAl't mt CICOlD ft: &tAte: SOIL BORING LOCATION DIAGRAM FOR: CITY OF PRIOR LAKE RING ROAD PRIOR LAKE. MINNESOTA ... ~niDAttl ... CAllftI.L/IWlI[: t . II r IT " . , ~ OWNER LOG OF BORING NUMBER 1 City of Prior Lake PROJECT NAME ARCHITECT-ENGINEER ST5 Consultants Ud. Ring Road Street and Utilities WS8 & Associates, Inc. SITE LOCATION -0 UNCONFINEO COMPRESSIVE STRENGTH From Tower Street to Toronto Avenue, Prior Lake, MN TONSIFT.' 1 2 3 4 5 ;= w PLASTIC WATER L10UlO u. u LIMIT % CONTENT % Z z LIMIT % ;= 0 w ~ DESCRIPTION OF MATERIAL ~ ~---.----6. LL ;:: ci 0- X :; ~ ~>- .... z 00: >-~ 10 20 30 40 50 "- w W W WW ~t W ...I -' -' ...I > 0 W "- 0- "-0 STANDARD ~ ~ ~~ .... .., XI - '" ~ PENETRATION BLOWSIFT. SURFACE ELEVATION +948.9 NGVD z'" en en '" 0: ::>...1 10 20 30 40 50 HS 0.6 Bituminous pavement ~ 1A SS 1.2 Fine to coarse sand, little gravel - brown - damp - medium ~ "dense - (SP-SW) - base course FILL 18 SS Sandy clay, trace gravel, onCK, plastic - gray-brawn - stm to firm - (CL) - FILL 2 SS ~2 / HS 3 5S *4i J HS ~ ..L , 4 55 , , HS 9.5 Silty fine to medium sand and fine to medium sand - gray - ~ 5 SS saturated - loose - (SM-SP) : ; HS i 6 SS ~ , HS \ 1 \ 7 SS H5 8 S5 C 70.0 *CaJ b rated enell' ~er End of boring at 20.0 ft. Boring backfilled with cuttings. The stratification lines represent the approximate boundary lines between soil types: in situ, the transition may be gradual. WL BORING STARTED STS OFFICE Minneapolis Area - 06 6.0 ft WS 10/12/00 'IWL BORING COMPLETED ENTERED BY SHEET NO. OF 8.5 ft BCR 10/12/00 ON 1 1 IWL RIG/FOREMAN APP'O BY STS JOB NO. 0-5OJHH MM 97973 ~ ~ t- o Cl '" .... '" , "- Cl ~ ~ en Cl o ...I Cl z '" o '" T ,. r 11 ),:1 i. ~ OWNER LOG OF BORING NUMBER 2 City of Prior Lake PROJECT NAME ARCHITECT-ENGINEER STS Consultants Ltd. Ring Road Street and Utilities WSB & Associates, Inc. SITE LOCATION -0 UNCONFINED COMPRESSIVE STRENGTH From Tower Street to Toronto Avenue, Prior Lake, MN TONSIFT.' 1 2 3 4 5 >=" w PLASTIC WATER LIOUID u. () Z :z LIMIT % CONTENT .'" LIMIT % >=" 0 w ~ DESCRIPTION OF MATERIAL ~ x- - - .--e- - - - - - e. u. ;::: 0 '" ! ~ ~ 22>- :z Ca: ~ ~. 10 20 30 40 50 ll. ~ W W ~~ W ... ... o t;: C W ll. ll. ll. 0 STANDARD ~ ~ ~ ~ SURFACE ELEVATION f- ~ Xl '- en 18l PENETRATION BLOWS/FT. +955.8 NGVD :z en en en ::> ... 10 20 3Q 40 50 HS 0.5 004' to 0.5' bituminous pavement 1 SS Fine to coarse sand, some gravel- brown - damp - dense - ~ 9 1.5 (SP-SW) - base course FILl- 1A SS MIXED FILL Clayey sand, sandy clay, silty sand, traces black topsoil - gray-brown - stiff to firm - (SC, Cl, SM) 2 55 ~ 9 H5 ~4 3 S5 ~; H5 1 6 4 SS 18l 9.2 1 Stratified sanely silt, silty clay, fine sand - gray - wet to saturated - soft to loose - (ML, Cl, SP) 4 5 S5 18l H5 6 55 ~ 15.5 6A S5 Sandy clay, trace gravel - gray - stiff - (Cl) HS " 7 SS ~3 0 * 20.0 *Calb rated Penet/1 meter End of boring at 20.0 ft. Boring backfilled with cuttings. The stratification lines represent the approximate boundary lines between soil types: in situ, the transition may be gradual. WL BORING STARTED STS OFFICE Minneapolis Area - 06 15.0 ft. WS 10/11/00 WL BORING COMPLETED ENTERED BY SHEET NO. OF 10/11/00 ON 1 1 WL RIG/FOREMAN APP'D BY STS JOB NO. D-50/HH MM 97973 ~ ~ f- e C) en f- en .., ll. C) ... .... ~ '" C) o ... C) z a: '0 en In I I. r II ). ~ OWNER LOG OF BORING NUMBER 3 City of Prior Lake PROJECT NAME ARCHITECT-ENGINEER STS Consultants Ud. Ring Road Street and Utilities WSB & Associates, Inc. SITE LOCATION -0 UNCONFINED COMPRESSIVE STRENGTH From Tower Street to Toronto Avenue, Prior Lake, MN TONS/FT.' 1 2 3 4 5 ;::- w PLASTIC WATER LlaUID u.. '-' LIMIT'll. CONTENT % LIMIT'll. Z z 1= 0 w ~ DESCRIPTION OF MATERIAL g x- - - -..... - - - 6. LL ~ 0 a. f ~ !!l >- .... Z 00: >-. 10 20 30 40 50 a. w w w WW ~ tL: w .... .... .... ....> 0 w a. a. a. 0 STANDARD ~ ~ :::au I- ..., Xl - '" I8l PENETRATION BLOWS/FT. <( W SURFACE ELEVATION +958.1 ~GVD Z <XI '" '" '" 0: ::> .... 10 20 30 40 50 H5 0.3' bituminous pavement 1 55 0.9 0.6' class 5 base course 1A 55 Fine to coarse sand, liWe gravel - brown - damp - dense to ~t medium dense - (SP-5W) FILL 2 55 ~8 ; H5 4.5 , Sandy clay, trace gravel- gray - stiff to firm - (CL) - FILL 12 3 S5 I8l " ,. H5 ! 4 55 1 *~ ,HS 9.4 I 1 3/4" to 1-1/2" crushed rock - brown - wet - (GP) - FILL I8l 5 5S 11.8 Silty fine to medium sand and fine to medium sand - gray - ~ saturated - medium dense - (SM-SP) 6 SS I ! HS ,'1 ~ 7 SS I I I HS ! '1 ~ 8 S5 20.0 *Calb rated Penetr meter End of boring at 20.0 ft. Boring backfilled with cuttings. The stratification lines represent the approximate boundary lines between soil types: in situ, the transition may be gradual. WL BORING STARTED STS OFFICE Minneapolis Area - 06 4.0 ft. WS 10/11/00 ',Wl BORING COMPlETED ENTERED BY SHEET NO. OF 3.8 ft. BCR 10/11/00 ON 1 1 IWL RIGlFOREMAN APP'D BY STS JOB NO. D-SOIHH MM 97973 ~ '" ~ I- o <!) '" I- (I) .., Q. <!) ~ ~ '" <!) g <!) Z 0: o <XI II 1.11 a ~ ~ OWNER LOG OF BORING NUMBER 4 City of Prior Lake PROJECT NAME ARCHITECT-ENGINEER STS Consultants Ud. Ring Road Street and Utilities WSB & Associates, Inc. SITE LOCATION D- UNCONFINED COMPRESSIVE STRENGTH From Tower Street to Toronto Avenue, Prior Lake, MN TONS/FT.' 1 2 3 4 5 ;::- w PLASTIC WATER LIQUID u.. u LIMIT % CONTENT % LIMIT % ~ ~ j:' 0 w DESCRIPTION OF MATERIAL ~ )f-----,,-- ---l::,. u.. ;:: 0 a. ,.... I ~ ~ !Q>- ,.... Z Olr >-. 10 20 30 40 50 0.. ~ ~ w WW a:: >-' UJ ...l ...l > 0 UJ a. a. 11.0 Ou.. STANDARD ~ ~ ~frl ,......, @ Xl -en PENETRATION BLOWS/FT. SURFACE ELEVATION +968.2 NGVD ZlIl en en "'Ir ::> ...J 10 20 30 40 50 0.3' bituminous pavement Silty fine to coarse sand, little gravel - brown - numld to damp - 23 1 SS medium dense to dense - (SM) - FILL @ 12 2 55 @ HS ~ 42 @ 3 55 HS 4 55 17.5 1 Silt and clayey silt - brown - wet - stiff - (ML) 11' 4A 55 *( ~. 9.2 Sandy clay, little gravel - brown - firm - (eLl I *~ '7 5 55 @ , \ I HS 13.0 \ Fine to coarse sand, silt traces - brown - saturated - medium HS dense - (SP-SW) \ \ \12 6 55 @ ! i I H5 ! 1 114 7 55 @ 20.0 *Calb rated Penetr lITleter End of boring at 20.0 ft. Boring backfilled with cuttings. The stratification lines represent the approximate boundary lines between soil types: in situ, the transition may be gradual. WL BORING STARTED STS OFFICE Minneapolis Area. 06 12.7 ft. WS 10/12/00 'IWL BORING COMPLETED ENTERED BY SHEET NO. OF 14.0 ft. BCR 10/12/00 ON 1 1 IWL RIGIFOREMAN I APP'O BY STS JOB NO. 0-50/HH MM 97973 ,.... o " en ,.... en .., lL " ::? ~ '" " g " Z a: o III I ~f I I. I, IT