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HomeMy WebLinkAboutCO 20 C� > } Change Order #020 Contract Number: CAG-11-192 Federal Aid Number: STPUL-CMO167(O48) Contract Title: Rainier Ave S Improvements Change Order Number: 020 Prime Contractor: Johansen Excavating X Ordered by Engineer under the terms of Section 1-04.4 of the Standard Specifications Change proposed by Contractor Endorsed by Surety Consent Contractor Attorney on Fact Date Date Original Contract Amount: $16,032,772.44 Current Contract Amount: $16,978,155.51 Estimated Net Change This Order: ($95,071.21) Estimated Contract Total After Change: $16,883,084.30 L4-proval Recommended ❑Approval Recommended esident Engineer 3((I Date Date V(ApprjRecommended ,, v City of Renton—[Project Manager Name I Irt Ha nson,�PE � Da e 213 Transportation Systems Division Date Representing You are ordered to perform the following described work upon receipt of an approved copy of the change order. Page 1 of 3 \\10.21.6.1\datalRainier Ave File Structure\700 Construction Admin-Project Control\715 Change Orders\715.2 Individual Change Orders\715.2.OXX CO XX CTS Roadway Section\Change Order No 020 Cover-CTS Roadway Section.docx Change Order #020 f Contract Number: CAG-11-192 Federal Aid#:STPUL-CM 167 048 Date: February 19,2013 Page 2 of 3 THE CONTRACT IS MODIFIED AS FOLLOWS: Background The existing design calls for the construction of a reservoir rock course and concrete roadway pavement between STA 30+90 and STA 32+60. During a meeting on September 27,2012,the contractor discussed the constructability of the concrete roadway panel work as specified and the significant impacts,such as lane closures,that would occur to transportation moving through the corridor during this phase of the project.Also discussed were the timeframe and the potential additional costs needed to insure public safety and access. Finally,the existing design calls for the excavation and removal of hazardous and contaminated soils. At the time of design,the soil conditions beneath the roadway from approximately STA 30+00 to STA 34+00 were largely unknown. Upon observation during the installation of storm drain pipe and the excavation of Wall#4 footing,the geotechnical engineer issued a design addendum memo dated November 8,2012. The memo concluded that using in-situ cement treated soil would adequately prepare the existing subgrade for asphalt placement.This method provides the ability to achieve a roadway section that performs as well as the original design,while reducing the cost,time,and traffic impacts. Therefore,the City of Renton will delete the reservoir course and cement concrete panel section between STA 30+90 and STA 32+60 from this contract and include cement treated soil for the area between STA 30+00 to STA 34+00 per the recommendations of the geotechnical addendum memo dated November 8,2012. Description of Change Contractor shall provide the necessary labor,equipment,and materials to complete the revised pavement section per the revisions on the following plan sheets: • Typical Sections,sheets 20 and 21,dated 11/28/12, by KPG • Alignment Plan,sheets 86 and 87,dated 11/28/12, by KPG • Alignment Detail,sheet 92,dated 11/28/12, by KPG • Drainage Plan,sheet 109,dated 11/28/12, by KPG • Drainage Details,sheet 128,dated 11/28/12,by KPG Description of Work The approach for the Cement Treated Soil(CTS)shall be as follows: • Median Section and Northbound Lanes—apply 10%cement and mix the layer 18"or more in thickness so that a section of 24"is the result.Contractor shall provide a CTS subgrade suitable for the construction of asphalt pavement. • Eastside;outside of the old curb—apply 10%cement and mix to improve the subgrade.Contractor to provide a CTS subgrade that is suitable to place pavement on it.and/or sidewalk upon p • A consistent subgrade section should be used throughout the CTS areas. This may require the introduction of CSBC to meet grade elevations. In addition,the following plan sheet, Landscape Plan,sheet 299,dated 11/28/12,by KPG was revised to allow for the installation of sidewalk in place of seeded lawn landscaping.Sidewalk will be placed from approximately STA 30+80,47' RT to STA 32+40,47' RT. Material 324 pounds of cement per cubic yard of treated subgrade soil. • Contract Number: CAG 11-192 STPUL-CM0167(048) 3 Plans/Reference Typical Sections,sheets 20 and 21,dated 11/28/12,by KPG Alignment Plan,sheets 86 and 87,dated 11/28/12,by KPG Alignment Detail,sheet 92,dated 11/28/12,by KPG Drainage Plan,sheet 109,dated 11/28/12, by KPG Drainage Details,sheet 128, dated 11/28/12,by KPG Timeline A total of—6.0—working days will be deleted from the Contract by this change order. Measurement&Payment Payment shall be made by the following: 'EM F a r A33 Roadway Excavation Including Haul CY 15,366 14,928 (438) $26.90 ($11,782.20) A36 SulvenL Cuntaminated Excavation and TN 1,942 1,474 (468) $94.80 ($44,3bb.40) Disposal Including Haul A41 Construction Geotextile for Underground SY 1,773 0 (1,773) $1.25 ($2,216.25) Drainage A43 Crushed Surfacing Base Course TN 11,111 10,882 (229) $14.55 ($3,331.95) A44 H MA f " or Overlay Class/ PG 64-22 TN 8,240 8,796 556 49 88.34 $ $49,117.04 A46 HMA for Overlay Class''/:" PG 70-22 TN 5,055 5,240 185 $85.65 $15,845.25 A48 Planing Bituminous Pavement SY 44,385 45,976 1,591 $2.85 $4,534.35 A54 Cement Concrete Pavement CY 1,207 720 (487) $247.95 ($120,751.65) A56 Reservoir Course,Including Haul TN 1,093 0 (1,093) $30.80 ($33,664.40) A248 Cement Treated Soil per RFP#21 CY 0 845 845 $61.00 $51,545.00 TOTAL CONTRACT CREDIT: ($95,071.21) A CONSTRUCTION MANAGEMENT 2/22/13 Mike Dysert P.O. Box 674 Buckley,WA 98321 Project: Rainier Ave.S.(167) Improvement,5 Grady Way to 5 2nd St Subject: Time Impact Reconciliation PW#: CAG-11-192 Fed Aid#:STPUL-CM0167(048) Doc#: SL 012 Dear Mr. Dysert, The purpose of this letter is to summarize the time impact issues, correspondences, and meetings that have occurred throughout the life of the project. • Per SL006, an additional 3.5 days will be added to the contract due to unanticipated force account work. • Per SL006, an additional 2.5 days will be added to the contract due to work extension. • Per SL009, an additional 7.5 days will be added to the contract due to unanticipated force account work. • Per SL 011, an additional 6.5 days will be added to the contract due to work extension. • Per the 2/18/13 schedule analysis meeting, no work days will be deleted from the contract as part of the"west end culvert deletion'change order. • Per the 2/18/13 schedule analysis meeting, no time impacts will be requested or granted arising from unanticipated erosion control work performed to date. • Per the 2/22/13 schedule analysis meeting, six work days will be deleted from the contract as part of the "CTS roadway section"design change. • Per the 2/22/13 schedule analysis meeting, no alteration in contract days will be made in relation to the"concrete crosswalk deletion'change order. • Per negotiations that occurred on 1/23/13, the compensation for an unanticipated force account work day will be at a rate of$603.41 per day and will contain all project costs associated with the extension of the project not covered by traditional force account markups. The compensation for a 2/22/2013 work extension day will be at a rate of$2500.66 per day and will contain all costs associated with the extension of the project. Sincerely, Nathan Monroe,PE Resident Engineer cc: Bob Hanson,PE—Transportation Design Supervisor,City of Renton Derek Akesson,PE—Project Engineer,City of Renton File I, 2 o y yQ ¢V N scar c<W W NLLor< 7N u ^m "� aurm i LU p 9A ���U a6s� ffX ° h << $ m aid ai°irca r✓, W i` °° zr6F '� .. . p �<�g > m: �° ''°S" �� V o6$�0 �� WW §-a r 'Yi - W v�bl< xg s° h e99°` W w ' . 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