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HomeMy WebLinkAboutItem 1c - Accept Sixth Avenue Sewer Capacity Improvement ProjectV~ GP,,IF0$nl9Fjdf `� STAFF REPORT � -Unity of �o Public Works Services Department DATE: August 19, 2014 TO: Honorable Mayor and City Council FROM: Tom Tait, Public Works Services Director By: Ken Herman, P.E., Principal Civil Engineer Deen Buharie, Assistant Engineer SUBJECT: ACCEPT ALL WORK PERFORMED BY GENTRY BROTHERS, INC. FOR THE SIXTH AVENUE SEWER CAPACITY IMPROVEMENT PROJECT AS COMPLETE AND AUTHORIZE THE FINAL PAYMENT TO BE MADE IN ACCORDANCE WITH THE CONTRACT DOCUMENTS Recommendation: Approve SUMMARY On February 4, 2014, the City Council awarded a contract to Gentry Brothers, Inc. in the amount of $407,100 for the Sixth Avenue Sewer Capacity Improvement Project. The final project cost was $445,660.99. This amount reflects the original contract amount of $407,100 plus change orders totaling $38,560.99, or 9.5% of the original contract amount. All terms and conditions of the contract have been met and the work has been performed to the satisfaction of City staff. It is recommended that the City Council accept all work performed by Gentry Brothers, Inc. as complete and authorize the final payment to be made in accordance with the contract documents, subject to retention of $22,283.05. DISCUSSION The City's Sewer System Management Plan (SSMP) has a goal of zero sewer system overflows. This is achieved through annual inspection and cleaning of the sewer pipes, repair of broken pipes, and replacement of pipes which are flowing, or have the potential to flow above their design capacity. In addition, as part of the City's 2006 Sewer Master Plan, all sanitary sewer mains were evaluated to compare existing flows through the pipes to the design capacities of the pipes. Evaluation of the sewer pipe on Sixth Avenue, north of Live Oak Avenue indicated that the sewer pipe was flowing above its design capacity and was at risk of experiencing a sewer system overflow. As a result, City staff worked with a design consultant to prepare plans and specifications to replace the existing 8 -inch pipe with a 12 -inch pipe from Live Oak Accept Sixth Avenue Sewer Capacity Improvement Project August 19, 2014 Page 2 of 2 Avenue to Longden Avenue, and a 10 -inch pipe from Longden Avenue to Verner Circle (see attached Location Map of the project area). The final construction cost of the project was $445,660.99. This amount reflects the original contract amount of $407,100 plus contract change orders for additional work, totaling $38,560.99, or 9.5% of the original contract price. The City contracting standard allows for change orders totaling up to 10% without returning to the City Council. The change orders were the result of additional work required by the Los Angeles County Sanitation District to tie into the County trunk line, quantity adjustments for lateral connections, and additional paving to improve the pavement condition of Sixth Avenue. A summary of the items included in the change orders is as follows: Change Order 2 3 FISCAL IMPACT Description of Change of Work Install sewer bypass, conduct night work, remove concrete at storm drain crossing Additional sewer connections to house laterals Grind and overlay additional street pavement Total Change Orders Amount $ 15,914.79 $ 2,590.00 $ 20,056.20 $ 38,560.99 Funds in the amount of $600,000 were budgeted in the Fiscal Year 2013 -14 Sewer Fund Capital Improvement Program for the Sixth Avenue Sewer Capacity Improvement Project. The total cost for this project is $445,660.99, which is within the approved budget. RECOMMENDATION It is recommended that the City Council accept all work performed by Gentry Brothers, Inc. for the Sixth Avenue Sewer Capacity Improvement Project as complete and authorize final payment to be made in accordance with the contract documents, subject to the retention of $22,283.05. Approved Dominic La77a2 City Manager Attachment: Project Location Map Sixth Ave Sewer Capacity Improvement Project Project No.: 33861514 CFn OP O O 'RAND VIEW NORTH ye OW 41 CITY OF ARCADIA "E RA RE BL , o ¢ yy zJm W O ORANGE GROVE � > z S z 3 a � F OTHILL BL z m m svcaM av �- FOREST PARK COLORADO ST COLOR BL SANTA ANRA fST'9D6EPfrl ST PARK �JLJ 441-F a SANT AR ST WRACK { H TNG N R P N O ?P 02 > �9 }titii O ?� J e FA H�N SOP 3 0 OC SANTA ANRA U m P R Y GOLF COURSE wo > HUNTINGTON ¢ CAMPUS DR Fn J F N A R C A D I A H S W_ > � 5 e ¢ RD > t z o a DU ARTE ¢ 66 o U z m CAMINO REAL ¢ CAMINO REAL J ¢ a O z F 7 w iEarvEa F z LONGDEN AV Z w O J a m LIVE O AV LAS TUNAS DR ,NE OAK V 1 PROJECT LOCATION a R a D LOCATION MAP a NOT TO SCALE