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HomeMy WebLinkAboutCOW 2007-08-13 Item 4B - Agreement - Change Order for Westfield Shoppingtown North Sewer Repair for $120,000 NN N J ��11LA, st9 COUNCIL AGENDA SYNOPSIS Q sy Initials ITEM NO. Ot' ...i i t, to; Meetinx Date Prepared by 1 Mayor's review 1 Council review D N f 08 i3 07 I BG us s SCI fit,' k c 08/20/07 1 BG�� 1908 I cs 1 I 1 L I I ITEM INFORMATION CAS NUMBER: 0 093 I ORIGINAL AGENDA DATE: AUGUST 13, 2007 AGENDA ITEM TILE Westfield Shoppingtown North Sewer Repair Project Approval of Budget and Change Order No. 1 for $120,000. CATEGORY Discussion Motion Resolution Ordinance Bid Award Public Hearing Other Mtg Date 8/13/07 Mtg Date 8/20/07 Mtg Date Mtg Date Mtg Date Mtg Date Mtg Date: SPONSOR Council Mayor Actin Svcs DCD Finance Fire Legal P&it Police Pff7 SPONSOR'S This project repaired the sanitary sewer lines that had settled at the Westfield SUMMARY Shoppingtown Mall. The repair is required before the sewer lines can be turned back to the Mall for ownership and maintenance per the developer's agreement. During construction, massive utility conflicts were discovered that required a re- design and a new alignment of the sanitary sewer line. Change Order No. 1 is for $120,000 and over the contingency and the budgeted amounts. REVIEWED BY COW Mtg. CA &P Cmte F&S Cmte Transportation Cmte Utilities Cmte Arts Comm. Parks Comm. Planning Comm. DAFE: 08/08/07 RECOMMENDATIONS: SPONSOR /ADMIN. Authorize Mayor to sign Change Order No. 1. COMMIIME Unanimous approval, forward to COW. COST IMPACT FUND SOURCE EXPENDITURE REQUIRED AMOUNT BUDGETED APPROPRIATION REQUIRED Est. 221,000.00 150,000.00 71,000.00 Fund Source: 402 Sewer Fund (page 115, 2007 CIP) Comments: Contract awarded was $100,559.62 plus 10% contingency for a total of $110,615.58 MTG. DATE I RECORD OF COUNCIL ACTION 08/13/07 1 08/20/07 1 MTG. DATE I ATTACHMENTS 08/13/07 Information Memo dated July 30, 2007 Exhibits A B As Bid and Re- design Drawings Utilities Committee Meeting Minutes from August 8, 2007 08/20/07 INFORMATION MEMO To: Mayor Mullet From: Public Works Director Date: July 30, 2007 Subject: Westfield Shoppingtown North Sewer Repair Project No. 06 SW04 Change Order Number 1 and Budget Shortfall ISSUE Change Order Number 1 in the amount of $120,000 brings this project over budget. BACKGROUND The Notice to Proceed for Contract No. 07 -063 with Construct Co. of Sumner, WA was issued on May 14, 2007. This project repaired the sanitary sewer line on the north side of Westfield Mall. A section of the City-owned sanitary sewer line near Macy's had settled which caused a low spot in the sewer line. The Developer's Agreement required that the City repair the sanitary sewer before the sewer could be turned back to the Mall for ownership and maintenance. This 20- calendar day contract was supposed to be substantially completed on June 3, however, due to massive utility conflicts, the substantial completion was not achieved until July 3, 2007. Change Order Number 1 has been negotiated at $120,000.00 to cover the resolution of considerable utility conflicts and will be paid as Force Account (time and materials). The entire week of night work between Sunday May 20 and Monday May 28 was spent potholing and analyzing the extensive concrete encased power conduits found to be placed over the existing sanitary sewer. The power conduits were found to be secondary power, which was not located by PSE. Westfield was not aware of the location and did not know they were responsible to locate the power conduits. The sanitary sewer alignment had to be re- designed away from the power conduits. See Exhibit A (as -bid design) and Exhibit B (re- design). After potholing again for utility conflicts on the re- designed alignment on May 31, work began on the new alignment on Friday night, June 1 and the manholes and pipes were successfully installed June 7. The following week was spent re- connecting the side sewers to the mall, grouting manholes and cleaning up. ANALYSIS While this change order amount is very high, the amount of re -work and extra work was extraordinary. The change order includes additional compensation for: standby time waiting for the new design (the average daily standby rate for this amount of labor and equipment was $3,000); extended bypass pumping at over $4,100, the additional asphalt patching was almost $9,000; and the seven nights of potholing averaged $8,000 for each night. The Developer's Agreement with Westfield does not require Westfield to locate utilities for the City's repair work. However, the Agreement requires that Tukwila repair the sewer in order to accept all of the water and sewer system. This turnover will eliminate several days of maintenance per year. The contract award amount was $100,559.62 plus 10% contingency for a total of $110,615.58. The budgeted amount is $150,000. The final total contract amount is expected to be around $221,000.00 and the contract will be closed out after final payment. The $71,000 budget shortfall will be taken out of the ending fund balance for the sewer fund (402.02). RECOMMENDATION Authorize the Mayor to sign Change Order No. 1 for $120,000. attachments: Exhibits A and B P_\PROJECTS\A- SW Projects \06swO4 Westfield North Sewer Repair\In10 Memo Westfield Change Order I Budget Ovemiadoc SANITARY SEWER FOR WESTFIELD SHOPPINGTOWN SANITARY SEWER FOR WESTFIELD SHOPPINGTOWN Transportation Committee Minutes Auaust 8, 2007— Pane 2 D. Westfield Shonninetown North Sewer Repair Change Order No. 1 Jim Morrow briefly explained a long standing agreement between the City and Westfield Shoppingtown in which the City had been maintaining the mall's utility lines since 1969. With the Mall's recent expansion plans, the City negotiated the return of ownership and maintenance of these utility lines back to the Mall. During inspection of the lines, one City -owned sanitary sewer line j located near Macy's was identified for repair. ,l In May of this year, a contractor was secured for the above mentioned repair work. During the repair process, City staff and the project contractor identified concrete encased power lines which were obstructing access to the sewer line. The project could not be constructed according to the original design, and required project redesign. This unanticipated interruption and need for additional work resulted in a substantial monetary change order. $150,000 was originally budgeted for this repair work. The final contract total with this change order is expected to total $221,000. This change order will cause the project to be over budget by $71,000. This shortfall will be taken from the ending fund balance for the sewer fund. Staff is requesting Council's authorization for the Mayor to sign Change Order No. 1. UNANIMOUS APPROVAL. FORWARD TO AUGUST 13 COW. E. Standby Power Upgrade Supplement No. 2 As per Council direction and identified emergency preparedness initiatives, staff has been moving forward with standby power upgrades for nine City facilities. The original contract for study and preliminary design is complete. The next step, Supplemental Agreement No. 2, will allow for final design and construction observation services for four facilities which were identified in the pre design report of the original contract (City Hall and Fire Stations 52, 53 and 54). Staff is seeking Council authorization for the Mayor to enter into an agreement with Abacus Engineered System for these services in the amount of $101,364. Staff hopes to be out for project bid this winter, and will return to Committee prior to construction. UNANIMOUS APPROVAL. FORWARD TO AUGUST 13 COW. M. MISCELLANEOUS Jim Morrow informed the Committee of a request made by the Washington State Department of Transportation in response to last week's bridge catastrophe in Minneapolis. The state is requesting the re- inspection of all steel truss bridges and bridges determined as structurally deficient. The Boeing Access Bridge is considered to be rated structurally deficient and will be re- inspected by the City's two certified bridge inspectors, Pat Brodin and Robin Tischmak. A bridge status report will be forwarded to the Department of Transportation. Staff stated that all bridges in Tukwila are inspected every two years. Meeting adjourned at 6:11 p.m. Next meeting: Tuesday, August 21, 2007 5:00 p.m. Conference Room No. 1 1inu� Committee Chair Approval KAM. Reviewed by GL.