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Grand River Center_Floor Settlement Remediation Project TO: The Honorable Mayor and City Council Members FROM: Michael C. Van Milligen, City Manager SUBJECT: Grand River Convention Center Floor Settlement Remediation Project (C I P's 3501991) DATE: August 30, 2012 Assistant City Engineer Bob Schiesl is recommending that a public hearing be set for September 17, 2012, for the Grand River Convention Center - Floor Settlement Remediation Project and to authorize advertisement for proposals. The Grand River Center (GRC) was opened to the public in October, 2003. In the summer of 2007, differential settlement was observed around the lobby and escalators. The geotechnical engineer of record, Terracon, and the deep foundation contractor for the GRC, Hayward Baker, were called in to inspect the observed settlement locations. Based on the recommendations of both Terracon and Hayward Baker, subsurface borings were performed around the escalator area. However, the subsurface investigation proved to be inconclusive, the fill material under the floor slab appeared to be of high density and no apparent voids were encountered directly under the slab. The decision was made retain the services of Hayward Baker to perform a specialized polyurethane foam grouting application to raise the slab-on-grade system. This method was effective in correcting the settling that occurring in this specific area of the building. During the February 2012 monthly inspections, the GRC showed signs of accelerated floor slab settlement in the escalator area, but the settlement had also moved laterally outward to the administrative offices, lobby and pre-functions areas. Bob Schiesl was informed and began follow up discussions with both Terracon and Hayward Baker. In March 2012, the City's survey crew measured baseline elevation readings throughout the main floor areas of the lobby, pre-function, restroom and offices. Based on the recorded elevations, settlement readings ranged from .25 inches to 2.64 inches, with the most significant settlement occurring at the base of the escalators (2.64"). Upon further inspection of the GRC, it does not appear that any of the building structure that is supported on deep foundation auger cast piling is showing signs of distress or movement. This would include the second floor conference rooms, the river room, and the underground parking structure. It appears that the primary main floor areas of the GRC that are experiencing the majority of the settlement are those areas supported by stone column foundations. It should be noted that minor settlement of the GRC was anticipated during the original design of the structure. The original 2002 Terracon report reported the soil conditions beneath the now-existing structure as a fill material to a depth of approximately 15 to 22 feet. This fill material was reported to be highly variable and composed of a combination of sand and clay, cinders, wood chips and fragments, and organics. Based on the pre- existing soil conditions and the geotechnical engineering foundation recommendations, the report indicated the structure could experience long term settlement to the magnitude of 1 inch. What remains uncertain is why over the last 6 months the structure has experienced such a rapid and accelerated degree of settlement at the main floor slab-on-grade areas. Staff has been working with Terracon, Hayward Baker, URETEK and other specialty contractors to discuss and evaluate repair and remediation alternatives and to establish budgetary cost projections. All of the specialty contractors recognize and acknowledge the complexity of the subsurface conditions as well as the challenges in performing non-destructive repairs within the confined finished space of the GRC. As a result, many of the specialty contractors are proposing a combination of solutions to provide both long-term settlement control and improve the existing slab-on-grade conditions on site in the short-term. Many of the proposed remediation solutions included the installation of geopiers, micropiles, helical piles, deep compaction grout applications, deep injection polymers, polyurethane foam grouting and slab-jacking. Due to the highly specialized nature of the floor system settlement repair and the proprietary methods and techniques used to perform the subsurface soil stabilization and remediation work, the City will develop plans showing the settlement and remediation areas; a scope of work, specifications and performance measures that the specialty contractors will use to prepare and submit a proposed remediation work plan along with an associated bid proposal for the work. Following the selection and award of a contract, the selected contractor will be required to provide a proposed remediation work plan that is signed by a Licensed Professional Engineer in the State of Iowa. This process is very similar to the Request for Proposal (RFP) process that the City uses when soliciting consultant professional services. Staff proposes to only bid the Floor Settlement Remediation Project at this time. Staff will solicit quotes from janitorial contractors to perform daily cleaning services in addition to retaining the services of Schindler Escalator for a technician to be on-site while remediation work is performed around the escalator. All other anticipated restoration work, such as the decorative concrete in the lobby entrance, carpeting, and tile will be informally bid separately and completed following the floor settlement remediation work. 2 Staff has worked closely with the GRC staff to minimize impacts to scheduled event and facility operations and will continue to do so for the duration of the project. Due to the disruptive nature of the remediation work to be performed in the interior main floor finished areas of the GRC, the contractor will be required to work during the evening hours, approximately 10:00 P.M. to 7:00 A.M. The contractor will be provided a schedule of events at the GRC and will be required to adjust working days and hours of operation to minimize impacts to scheduled event. Sufficient funds in the amount of $551,050 have been identified to complete the project. I concur with the recommendation and respectfully request Mayor and City Council approval. / AAh kt1&1 Michael C. Van Milligen MCVM:jh Attachment cc: Barry Lindahl, City Attorney Cindy Steinhauser, Assistant City Manager Teri Goodmann, Assistant City Manager Robert Schiesl, Assistant City Engineer 3 THE C D Masterpiece on the Mississippi TO: Michael C. Van Milligen, City Manager Gus Psihoyos, City Engineer FROM: Robert Schiesl, Assistant City Engineer SUBJECT: Grand River Convention Center Floor Settlement Remediation Project (CIP's 3501991) DATE: August 29, 2012 INTRODUCTION Dubuque All- America City II II 2012 The enclosed resolutions authorize the public bidding procedure for the Grand River Convention Center - Floor Settlement Remediation Project. BACKGROUND The Grand River Center (GRC) was opened to the public in October, 2003. In the summer of 2007, differential settlement was observed around the lobby and escalators. The geotechnical engineer of record, Terracon, and the deep foundation contractor for the GRC, Hayward Baker, were called in to inspect the observed settlement locations. Based on the recommendations of both Terracon and Hayward Baker, subsurface borings were performed around the escalator area. However, the subsurface investigation proved to be inconclusive, the fill material under the floor slab appeared to be of high density and no apparent voids were encountered directly under the slab. The decision was made retain the services of Hayward Baker to perform a specialized polyurethane foam grouting application to raise the slab -on -grade system. This method was effective in correcting the settling that occurring in this specific area of the building. Since 2010, monthly inspections of the GRC have taken place by the City and Platinum Hospitality. At this time capital projects, operating concerns, schedules, and more are addressed. The monthly inspection includes walking about the Center to address physical issues of the building. Marie Ware, Leisure Services Manager, and Mitzi Yordi, General Manager for Platinum Hospitality, began to note concerns regarding what seemed to be settling in the lobby area around the escalator. A request was also made to Assistant City Engineer, Bob Schiesl, to have him inspect the concerned area because he had worked with the settlement problem in the prior years. It was agreed to continue to closely monitor the situation. During the February 2012 monthly visit, the GRC showed signs of accelerated floor slab settlement in the escalator area, but the settlement had also moved laterally outward to the administrative offices, lobby and pre- functions areas. Bob Schiesl was informed and began follow up discussions with both Terracon and Hayward Baker. In March 2012, the City's survey crew measured baseline elevation readings throughout the main floor areas of the lobby, pre- function, restroom and offices. Based on the recorded elevations, settlement readings ranged from .25 inches to 2.64 inches, with the most significant settlement occurring at the base of the escalators (2.64 "). During this same time period, the escalator was experiencing operational issues and the escalator service technician was called in to review. Based on the magnitude of the settlement at the base of the escalator and the rotational movement observed at the top of the escalator, the decision was made to turn off the escalator in the interest of public safety and to prevent any further damage from occurring. Upon further inspection of the GRC, it does not appear that any of the building structure that is supported on deep foundation auger cast piling is showing signs of distress or movement. This would include the second floor conference rooms, the river room, and the underground parking structure. It appears that the primary main floor areas of the GRC that are experiencing the majority of the settlement are those areas supported by stone column foundations. It should be noted that minor settlement of the GRC was anticipated during the original design of the structure. The original 2002 Terracon report reported the soil conditions beneath the now - existing structure as a fill material to a depth of approximately 15 to 22 feet. This fill material was reported to be highly variable and composed of a combination of sand and clay, cinders, wood chips and fragments, and organics. Based on the pre- existing soil conditions and the geotechnical engineering foundation recommendations, the report indicated the structure could experience long term settlement to the magnitude of 1 inch. What remains uncertain is why over the last 6 months the structure has experienced such a rapid and accelerated degree of settlement at the main floor slab -on -grade areas. DISCUSSION Staff has been working with Terracon, Hayward Baker, URETEK and other specialty contractors to discuss and evaluate repair and remediation alternatives and to establish budgetary cost projections. All of the specialty contractors recognize and acknowledge the complexity of the subsurface conditions as well as the challenges in performing non - destructive repairs within the confined finished space of the GRC. As a result, many of the specialty contractors are proposing a combination of solutions to provide both long -term settlement control and improve the existing slab -on -grade conditions on site in the short -term. Many of the proposed remediation solutions included the installation of geopiers, micropiles, helical piles, deep compaction grout applications, deep injection polymers, polyurethane foam grouting and slab - jacking. Due to the highly specialized nature of the floor system settlement repair and the proprietary methods and techniques used to perform the subsurface soil stabilization and remediation work, the City will develop plans showing the settlement and remediation areas; a scope of work, specifications and performance measures that the specialty contractors will use to prepare and submit a proposed remediation work plan along with an associated bid proposal for the work. Following the selection and award of a contract, the selected contractor will be required to provide a proposed remediation work plan that is signed by a Licensed Professional Engineer in the State of Iowa. This process is very similar to the Request for Proposal (RFP) process that the City uses when soliciting consultant professional services. Staff proposes to only bid the Floor Settlement Remediation Project at this time. Staff will solicit quotes from janitorial contractors to perform daily cleaning services in addition to retaining the services of Schindler Escalator for a technician to be on -site while remediation work is performed around the escalator. All other anticipated restoration work, such as the decorative concrete in the lobby entrance, carpeting, and tile will be informally bid separately and completed following the floor settlement remediation work. GRAND RIVER CENTER - EVENT COORDINTION Staff has worked closely with the GRC staff to minimize impacts to scheduled event and facility operations and will continue to do so for the duration of the project. Due to the disruptive nature of the remediation work to be performed in the interior main floor finished areas of the GRC, the contractor will be required to work during the evening hours, approximately 10:00 P.M. to 7:00 A.M. The contractor will be provided a schedule of events at the GRC and will be required to adjust working days and hours of operation to minimize impacts to scheduled event. Each morning, following the contractors work operations, the City will retain the services of the janitorial contractor to perform daily cleaning of the administrative offices, lobby, pre- functions areas in addition to other areas as needed. ESCALATOR SERVICE AND REPAIR Staff has worked closely with Schindler Escalator personnel. Due to the nature of the remediation work to be performed to stabilize and raise the escalator pit, Schindler Escalator will be required to have a technician on -site while remediation work is performed around the escalator. Following the raising and leveling of the escalator, Schindler Escalator personnel will assess the condition of the escalator and will perform the necessary work required to make the escalator operational. PROJECT SCHEDULE The schedule for the Floor Settlement Remediation project is as follows: Initiate Public Bidding Process September 4, 2012 Publish Notice to Bidders, Advertise for Bids September 7, 2012 Publish Public Hearing Notice on Plans & Specs September 7, 2012 Public Hearing on Plans & Specifications September 17, 2012 Receipt of Bid Proposals (Bid Letting) September 20, 2012 Award Construction Contract October 1, 2012 Project Completion Date December 7, 2012 RECOMMENDATION I recommend that the City Council establish a date for the Grand River Convention Center - Floor Settlement Remediation Project public hearing and authorize the City Clerk to advertise for proposals. BUDGETIMPACT The overall planning level estimate to remediate, repair and restore the Grand River Convention Center main floor settlement areas is as follows: The estimate of probable cost to complete the immediate Floor Settlement Remediation Project and restore the operational use of the escalators is as follows: Estimate Floor Settlement Remediation $ 250,000.00 Janitorial Cleaning Service 15,000.00 Escalator Service and Repair (Service Contract) 75,000.00 Decorative Concrete Replacement 35,000.00 Carpet Replacement 50,500.00 Restroom Tile Replacement 10,000.00 Drywall & Ceiling Tile Repair 10,000.00 Painting 10,000.00 Contingency 45,550.00 Construction Engineering, Administration & Inspection 50,000.00 Total Project Funding Total Project Cost 1551.050.00 The estimate of probable cost to complete the immediate Floor Settlement Remediation Project and restore the operational use of the escalators is as follows: The project funding summary is as follows: CIP No. Estimate Floor Settlement Remediation $ 250,000.00 Janitorial Cleaning Service 15,000.00 Escalator Service and Repair (Service Contract) 75,000.00 Construction Engineering, Administration & Inspection 23,500.00 Grand River Center Mechanic Room Screen Total Project Cost IM The project funding summary is as follows: CIP No. Fund Description Fund Amount 3501991 Grand River Center Floor Leveling $ 45,279.00 1021214 Veteran's Memorial Ball Field 130,250.00 1002198 Grand River Center Mechanic Room Screen 12,000.00 1022113 Grand River Center Replace Carpet 70,768.00 1002197 Grand River Center Paint Exhibit Hall 70,203.00 1022391 Grand River Center Office Painting 35A00.00 Total Project Funding $ 363.500.00 Staff has identified sufficient funding to cover the immediate Floor Settlement Remediation Project and to restore the operational use of the escalators. The project cost remaining of $187,550 which includes decorative concrete replacement ($35,000), carpet replacement ($50,500), restroom tile replacement ($10,000), drywall and ceiling tile repair ($10,000), painting ($10,000), project contingency ($45,550) and construction engineering, administration and inspection ($26,500) will be funded by the one million dollars one -time reserve that was established by City Council in Fiscal Year 2013. ACTION TO BE TAKEN The City Council is requested to establish the date of the public hearing and to authorize the City Clerk to advertise for proposals through adoption of the enclosed resolutions for the Grand River Convention Center - Floor Settlement Remediation Project. cc: Jenny Larson, Budget Director Marie Ware, Leisure Services Manager Chris Lyons, Engineering Technician F: \PROJECTS \GRCC - Grand River Convention Center Repairs \Floor Settlement Repairs 2012 \Council & Staff Documentation \Initiate \Grand River Center Floor Settlement Repairs - Staff Initiate Memo NOTICE TO BIDDERS CITY OF DUBUQUE PUBLIC IMPROVEMENT PROJECT GRAND RIVER CONVENTION CENTER FLOOR SETTLEMENT REMEDIATION PROJECT Time and Place for Filing Sealed Proposals. Sealed bid proposals for the work comprising each improvement as stated below must be filed before 2:00 p.m. on September 20th, 2012, in the Office of the City Clerk, City Hall - First Floor, 50 West 13th Street, Dubuque, Iowa. Time and Place Sealed Proposals Will be Opened and Considered. Sealed proposals will be opened and bids tabulated at 2:00 p.m. on September 20 , 2012, at City Hall - Conference Room B, 50 West 13th Street, Dubuque, Iowa, for consideration by the City Council (Council) at its meeting on October 1st, 2012. The City of Dubuque, Iowa, reserves the right to reject any and all bids. Time for Commencement and Completion of Work. Work on each improvement shall be commenced within 10 da�rs after the Notice to Proceed has been issued and shall be completed by December 7 h, 2012. Bid Security. Each bidder shall accompany its bid with a bid security as security that the successful bidder will enter into a contract for the work bid upon and will furnish after the award of contract a corporate surety bond, acceptable to the governmental entity, for the faithful performance of the contract, in an amount equal to one hundred percent of the amount of the contract. The bid security shall be in the amount of ten percent (10 %) of the amount of the contract and shall be in the form of a cashier's check or certified check drawn on a state - chartered or federally chartered bank, or a certified share draft drawn on a state - chartered or federally chartered credit union, or the governmental entity may provide for a bidder's bond with corporate surety satisfactory to the governmental entity. The bid bond shall contain no conditions excepted as provided in this section. Contract Documents. Construction Bidding Documents may be obtained or viewed at the Office of the City Engineer, City Hall - Second Floor, 50 West 13th Street, Dubuque, Iowa. No plan deposit is required. Project information will also be posted on the City's website at www.cityofdubugue.org. Davis -Bacon Federal Prevailing Wage Requirements. Davis -Bacon Federal prevailing predetermined wage rates and related labor requirements and regulations WILL NOT APPLY to work under the contract. Preference for Iowa Products and Labor. By virtue of statutory authority, preference will be given to products and provisions grown and coal produced within the State of Iowa, and to Iowa domestic labor, to the extent lawfully required under Iowa statutes. Equipment or products authorized to be purchased with federal funding awarded for this contract must be American -made to the maximum extent feasible, in accordance with Public Law 103 -121, Sections 606 (a) and (b). Sales Tax. The bidder should not include sales tax in its bid. A sales tax exemption certificate will be available for all material purchased for incorporation in the project. General Nature of Public Improvement. Grand River Convention Center - Floor Settlement Remediation Project The scope of the project includes performing non - destructive subsurface soil stabilization remediation and repairs to the existing slab -on -grade floor system in the interior finished lobby and pre- function areas of the Grand River Center to provide both long -term settlement control and improve the existing slab -on -grade conditions on site in the short -term. Pre -Bid Construction Conference. There will be no Pre -Bid Construction Conference held for this project. Published in the Telegraph Herald, September 7th, 2012. RESOLUTION NO. 237 -12 GRAND RIVER CONVENTION CENTER FLOOR SETTLEMENT REMEDIATION PROJECT PRELIMINARY APPROVAL OF PLANS, SPECIFICATIONS, FORM OF CONTRACT, AND ESTIMATED COST; SETTING DATE OF PUBLIC HEARING ON PLANS, SPECIFICATIONS, FORM OF CONTRACT, AND ESTIMATED COST; AND ORDERING THE ADVERTISEMENT FOR BIDS NOW THEREFORE, BE IT RESOLVED BY THE CITY COUNCIL OF THE CITY OF DUBUQUE, IOWA: The proposed plans, specifications, form of contract and estimated cost for the Grand River Convention Center - Floor Settlement Remediation Project, in the estimated amount $250,000.00, are hereby preliminarily approved and ordered filed in the office of the City Clerk for public inspection. A public hearing will be held on the 17th day of September, 2012, at 6:30 p.m. in the Historic Federal Building Council Chambers (second floor), 350 West 6th Street, Dubuque, Iowa, at which time interested persons may appear and be heard for or against the proposed plans and specifications, form of contract and estimated cost of said Project, and the City Clerk be and is hereby directed to cause the attached notice of the time and place of such hearing to be published in a newspaper having general circulation in the City of Dubuque, Iowa, which notice shall be published not less than four days nor more than twenty days prior to the date of such hearing. At the hearing, any interested person may appear and file objections to the proposed plans, specifications, form of contract, or estimated cost of the Project. The Grand River Convention Center - Floor Settlement Remediation Project is hereby ordered to be advertised for bids for construction. The amount of the security to accompany each bid shall be in an amount which shall conform to the provisions of the Notice to Bidders hereby approved. The City Clerk is hereby directed to advertise for bids for the construction of the improvements herein provided, by publishing the attached Notice to Bidders to be published in a newspaper having general circulation in the City of Dubuque, Iowa, which notice shall be published not less than four but not more than forty -five days before the date for filing bids before 2:00 p.m. on the 20th day of September, 2012. Bids shall be opened and read by the City Clerk at said time and will be submitted to the City Council for final action at 6:30 p.m. on the 1st day of October, 2012, in the Historic Federal Building Council Chambers (second floor), 350 West 6th Street, Dubuque, Iowa. Attest: Passed, adopted and approved this 4th day ofseptembe,r201 Dtki Roy D. Buol, Mayor Kevin S Firnstahl, City' NOTICE OF PUBLIC HEARING ON PLANS, SPECIFICATIONS, FORM OF CONTRACT, AND ESTIMATED COST FOR THE GRAND RIVER CONVENTION CENTER - FLOOR SETTLEMENT REMEDIATION PROJECT NOTICE IS HEREBY GIVEN: The City Council of the City of Dubuque, Iowa will hold a public hearing on the proposed plans, specifications, form of contract and estimated cost for the Grand River Convention Center - Floor Settlement Remediation Project, in accordance with the provisions of Chapter 26, Code of Iowa, at 6:30 p.m., on the 17th day of September, 2012, in the Historic Federal Building Council Chambers (second floor), 350 West 6th Street, Dubuque, Iowa. Said proposed plans, specifications, form of contract and estimated cost are now on file in the office of the City Clerk. At said hearing any interested person may appear and file objections thereto. The scope of the Project is as follows: Contractor shall perform non - destructive subsurface soil stabilization remediation and repairs to the existing slab -on -grade floor system in the interior finished lobby and pre - function areas of the Grand River Center to provide both long -term settlement control and improve the existing slab -on -grade conditions on site in the short -term. Any visual or hearing- impaired persons needing special assistance or persons with special accessibility needs should contact the City Clerk's office at (563) 589 -4120 or TDD at (563) 690- 6678 at least 48 hours prior to the meeting. Published by order of the City Council given on the ay o ' 2012. Kevin ' ' irnstahl, Cit ClerW ar Legal Notices NOTICE OF PUBLIC HEARING ON PLANS, SPECIFICATIONS, FORM OF CONTRACT, AND - ESTIMATED COST FOR THE GRAND RIVER CON= VENTION CENTER - FLOOR SETTLEMENT REMEDIATION PRO- JECT ., NOTICE IS HEREBY GIVEN: The City Council of the City of Dubuque, Iowa will hold a public hearing on the proposed plan s, specifications, form of contract and estimated cost for the Grand River Convention Center - Fl000r� Settle- ment Remlediation Project, in accordance with the provisions of Chapter 26, Code of Iowa, at 6:30 p.m., on the 17th day of September, 2012, in the Historic Federal Build- ing Council Chambers (second . floor), 350 West 6th Street, Dubuque, Iowa. Said proposed plans, speci- fications, form .. of contract and estimated cost are now on file in the office of the City Clerk. At said hearing any interested person may appear and file objections thereto. The scope of the Project is as follows: Contractor " shall perform non-destruc- tive subsurface soil stabilization remedia- tion and repairs to the existing slab -on -grade floor system in the interior finished lobby and pre - function areas of - the Grand River Center to provide'' both long -term settlement control and improve the existing slab-on- grade conditions on site in the short- term. Any visual or hearing impaired persons need- ing special assistance or persons with special accessibility needs should contact the City Clerk's office at (563) 589 -4120 or TDD at (563) 690 -6678 at least 48 hours prior to the meeting. Published by order of the City Council given on - the 4th day of September, 2012. Kevin S. Fimstahl, CMC, City Clerk it 9/7 NOTICE TO BIDDERS CITY OF DUBUQUE PUBLIC IMPROVEMENT PROJECT GRAND RIVER CONVENTION Proceed has been issued and shall be completed by Decem- ber7th,2012. Bid Security. Each bidder shall accom pany its bid with a bid security as security that the successful bidder will enter into a contract for the work bid upon and will furnish after the award of contract a corporate surety bond, accept- able to the govern- I mental entity, for the faithful performance of the contract, in an amount equal to one hundred percent of the amount of the con- tract. The .bid security shall be in the amount of ten percent (10 %) of the amount of the contract and shall be in the form of a cashier's . check or certified check drawn on a state - chartered or federally chartered bank, or a certified share draft drawn on a state - chartered or federally chartered credit union, or the governmental entity may provide for a bidder's bond with corporate surety satis- factory to the governmental entity. The bid bond shall contain no conditions - ,excepted as provided in this section. Contract Docu- ments.. Construction Bidding Documents may be obtained or viewed at the Office of the City Engineer, City Hall - Second Floor, 50. West 13th Street, Dubuque, Iowa, No ' plan deposit . is required. Project information will also be posted on the City's website at www.cityofdubuque.org. Davis -Bacon Fed- eral Prevailing Wage Requirements. Davis- Bacon Federal prevail - ing predetermined wage rates and related labor requirements and regulations WILL NOT APPLY to work under the contract. Preference for Iowa Products and Labor. By- virtue of 'statutory authority, preference . will be given to products and 'provi- sions grown and coal produced within the State of Iowa, and to lowadomestic labor, to the extent lawfully required . under Iowa statutes. Equipment or products authorized to be purchased with ' federal funding award- ed for this contract must be American- ,(;E(VTER made, to the maximum FLOOR SETTLEMENT extenntl 9, feasible in REMEDIATlON a'ccordahcewiith Public PROJECT' Time and Place for Filing Sealed Propo- sals. Sealed bid proposals for the work comprising each improvement as stated below must be filed before 2:00 p.m. on September 20th, 2012, in the Office of the City Clerk, City Hall - First Floor, 50 West . 13th Street, Dubuque, Iowa. Time and Place Sealed Proposals Will be Opened and Considered. Sealed proposals will be opened and bids tabulated at 2:00 p.m. on September 20th, 2012, at City Hall - Conference Room B, 50 West 13th. Street, Dubuque, Iowa, for consideration by the City Council (Council) at its meeting on October 1st, 2012..The City of Dubuque„ Iowa, reserves the right to reject any and all bids. Time for Com- mencement -: _.and, Completion of Work. Work on • each improvement shall be commenced within 10 days after the Notice to Law 10§ =121, Sections 606 (a) and (b). Sales Tax. The bidder should not include sales tax in its bid. A sales tax . exemption certificate will be available for all material purchased for incorporation, in the General Nature of Public Improvement. Grand River Conven- tion Center - `Floor Settlement Remedia- tion Project The scope of the project includes per- forming non- destruc- tive subsurface soil stabilization remedia- tion and repairs to the existing slab -on -grade floor system in the interior finished lobby and ,pre- furjction ,areas .of� the ?Grand River Cepter to provide both long -term settlement controls and improve i the ;'existing slab -on -I grade conditions on site in the short- term. Pre -Bid .: Construe- Crony A Conference. There will be no aPre- Bid Construction Con- ference held for this project. Published in the Telegraph Herald, September 7th, 2012. 1t 9/7 . ' STATE OF IOWA {SS: DUBUQUE COUNTY CERTIFICATION OF PUBLICATION I, Suzanne Pike, a Billing Clerk for Woodward Communications, Inc., an Iowa corporation, publisher of the Telegraph Herald,a newspaper of general circulation published in the City of Dubuque, County of Dubuque and State of Iowa; hereby certify that the attached notice was published in said newspaper on the following dates: September 07, 2012, and for which the charge is $74.99. Subscribed to before me, a this /88 day otar Public in and for Dubuque County, Iowa, , 20 /,„2., Notary Public in and for ubuque County, Iowa. Coun I16ae Commission NOM 4N