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Home My WebLink About2009/10/20 Item 6 CITY COUNCIL AGENDA STATEMENT ~Vt- CITY OF .~ (HUlA VISTA 10/20/09, Item~ REVIEWED BY: RESOLUTION OF THE CITY COUNCIL OF THE CITY OF CHULA VISTA ACCEPTING THE FINAL REPORT OF EXPENDITURES FOR THE "EMERGENCY STORM DRAIN AND SLOPE REPAIR AT 1526 GRAND TETON COURT (DRI80)" AND RATIFYING THE ACTIONS OF THE CITY MANAGER AND DIRECTOR OF PUBLIC WORKS FOR MAKING AND EXECUTING A CONTRACT FOR SAID EMERGENCY REPAIR WITH CASS CONSTRUCTION, IN~.. . DIRECTOR OF PUBLIC WORKS" ~. ASSISTANT DfRECTOR OF ENGIN' ~ CITY MANAGE~ ASSISTANT CI~~fMANAGER ~J 4/5THS VOTE: YES 0 NO 0 ITEM TITLE: SUBMITTED BY: SUMMARY On February 19, 2009, Public Works received a call fTom Mr. Han Su Taik, the owner of the residence at 1526 Grand Teton Court that a large hole appeared at the rear yard of his property. Public Warks staff responded immediately to secure the affected area amI to prevent any other potential problems and ensure public safety. The sinkhole was caused by piping (the underground movement of soil by water) of the fill soils surrounding an existing 18" RCP storm drain pipe that runs within the property. In accordance with the emergency provisions of Section 1009 of the City Charter, City staff contracted the services of Cass Construction, Inc. (General Engineering Contractor License No. 298336) for the repair. The repair was completed on June I, 2009. An Informational Item was submitted on February 27,2009 (Attachment I) with the plan to report back to City Council after the filiI cost of the project was identified. This report represents the total expenditures for the repair. ENVIRONMENTAL REVIEW The Environmental Review Coordinator has reviewed the proposed activity for compliance with the California Environmental Qlwlity Act (CEQA) and has determined, based on the evidence presented, that the activity falls under the emergency project exemption for specific actions necessary to prevent or mitigate an emergency, pursuant to Section 15269 (c) of the State CEQA Guidelines. Thus, no further environmental review is necessary. 6-1 10/20/09, Item~ Page 2 of 3 RECOMMENDATION Council adopt the resolution. BOARDS/COMIVIISSION RECOMMENDATION Not applicable. DISCUSSION On Thursday, February 19, 2009, Public Works received a call trom Mr. Han Su Taik, the owner of the single-family residence at 1526 Grand Teton Court that a large hole appeared at the rear yard of his property, adjacent to a swimming pool. Public Works staff responded immediately to secure the affected area and to evaluate the situation. During the evaluation of the site, staff confirmed the presence of a 7 feet-wide by 7 feet-long by 10 feet-deep sinkhole directly over an existing publicly owned 18" reinforced concrete pipe (RCP) storm drain. Public Works staff immediately stabilized the site by placing temporary backfill and installing safety barricades around the perimeter of the sinkhole. In order to determine the extent of the repair and to obtain a precise construction bid estimate, a geotechnical consultant (Ninyo & Moore), selected from the City's on-call consultant list, was retained to perform soil testing, to assess geotechnical conditions, and to provide repair recommendations. This report assisted the City and the contractor in determining the scope and extent of the necessary repair and associated costs. Ninyo & Moore's report concluded that the sinkholes along the western edge of the property were caused by groundwater piping of the fill soils adjacent to the 18-inch RCP storm drain. This loss offill soils around the 18" RCP also led to the separation of pipe joints, additional loss of soil, and tree root intrusion into the storm drain. Ninyo & Moore's recommendation was to remove and replace the existing 18-inch storm drain pipe and to repair the slope distress by removing the disturbed material and rebuilding the slope with compacted fill, which included the use of a geo-grid reinforcing system, a keyway, and back drains. The Director of Public Works and the City Manager agreed with the recommendation of staff on the necessity to proceed with the emergency repair due to the fact that if the slope and storm drain were not repaired as soon as possible, the pool and the house could sustain additional, unnecessary damage and could also threaten neighboring properties. Contractor Selection Process Staff prepared and solicited three informal bids from qualified contractors that have previously worked for the City of Chula Vista. On April 7, 2009 the City received three proposals. The Contractors were ranked as follows: Contractor Proposal Amount Contractor Ranking Cass Construction Co., Inc. $125,553.00 First Negotiation Preference TC Construction Co., Inc. $198,435.00 Second Negotiation Preference vVest Tech Contracting. $276,125.90 Third Negotiation Preference 6-2 10/20/09, Item~ Page 3 of 3 Staff Costs In addition to construction activities, staff time is also required for construction inspection, geotechnical investigation and administrative staff. These staff components total $43,917. DECISION MAKER CONFLICT Staff has reviewed the property holdings of the City Council and has found no property holdings within 500 feet of the property, which are the subject action. CURRENT FISCAL IMPACT There is no impact to the General Fund as there are sut1icient TransNet funds in the existing crr DR180 (approved by City Council under the FY 2009-10 Capital Improvement Program) necessary to fund the project. A breakdown of the project costs is as follows: Item Cass Construction, Inc. (Final Cost, indudmg quantity adjustments emd contract change orders) Nin 0 & Moore Geotechnical Consultants Ci ty Staff Amount $ 127,179.01 35,318.00 43,917.00 ONGOING FISCAL IMPACT The improvement will require only routine City maintenance. ATTACHMENTS 1. Council Information Item Prepared by: Luis A. Labrada, Associate Engineer. Department o.t'?ublic Works-Engineering M:\Engineer\AGENDA\CAS2009\IO-20-09\DR180A A-113 Rev.doc 6-3 MEMO ATTACHMENT ~\r(,... ~ "-..>., . ~--~ -- I ClIT OF (HULA VISTA Department of Public Works DATE: February 27,2009 TO: The Honorable Mayor and City Council VIA: Jim Sandoval, City Manage~ ~ Scott Tulloch, Assistant ci~-iia:ager S '/ . FROM: R A. Hopkins, Director of Public Works @-- SUBJECT: Emergency Storm Drain and Slope Repair at 1526 Grand Teton Court On Thursday, February 19,2009, Public Works received a call from Me. Han Su Taik, the owner of the single-family residence at 1526 Grand Teton Court, that a large hole appeared at the rear yard of his property, adjacent to a swimming pooL Public Works staff responded immediately to secure the affected area and to evaluate the situation. During the evaluation of the site, staff confirmed the presence of a T-wide by T-Iong by 10'-deep sinkhole and that it was directly over an existing publicly owned 18" reinforced concrete pipe (RCP) storm drain. Public Works staff immediately stabilized the site by placing temporary backfill and installing safety barricades around the perimeter of the sinkhole. The home is currently vacant. The 18" RCP extends from the curb line on Grand Teton Court through the side yard ofthe property and it outlets at the toe of slope adjacent to an SDG&E transmission easement, as shown on the attached plat. At this point, it is not known what caused the sinkhole. A geotechnical consultant (Ninyo & Moore) is studying the problem and will identify the cause of the sinkhole and provide detailed recommendations/plans to restore the storm drain, slope, and property. Restoration work will be implemented as soon as possible. Ninyo & Moore's recommendations will assist the City and the City's Contractor to determine the repair area and associated costs. City staff has taken all possible precautions to ensure the temporarv safetv for the property and its residents during this pre-repair period. However, because we are still in the rainy season, staff believes that if the repair is not .performed as soon as possible, the property could sustain additional and unnecessary damage. Therefore, the Public Works Department believes it is important to complete all repair and restoration work immediately. Staff intends to enter into an emergency repair contract in accordance with the emergency provision of Section 1009 of the City Charter based upon the necessity to preserve life, health, and property. Upon receiving and concurring with Ninyo & Moore's recommendations, City staff will solicit three bids from responsible Contractors that have previously worked for the City and have performed similar type work satisfactorily. The preliminary, estimated cost for this repair is $150,000. This estimate includes the geotechnical recommendations report, construction repairs. and City staff costs. Staff will be using the General Fund Reserves to undertake this work as no other funding sources are available at this time. Staff will return to Council with a full report as soon as the repair has been completed. Attachment M:\Engineer\AGENDA\lnformation ltems\Emergency repair 1526 Grand Teton Ct.doc 6-4 w '" '" ..-- o I- .... U <: o .... '" I- -0 = r'., ~ I', C). .,", ::'; ",;:., L_(~r \- o '2 : ~~::~,:1 ~~~'I, ~. ~;' . ; ',\; '\ ~f~;<. " c ::"-~ , ~.:. I f~~r~~,~" 6 5 RESOLUTION NO. 2009- RESOLUTION OF THE CITY COUNCIL OF THE CITY OF CHULA VISTA ACCEPTING THE FINAL REPORT OF EXPENDITURES FOR THE "EMERGENCY STORM DRAIN AND SLOPE REPAIR AT 1526 GRAND TETON COURT (DRI80)" AND RATIFYING THE ACTIONS OF THE CITY MANAGER AND DIRECTOR PUBLIC WORKS FOR MAKING AND EXECUTING A CONTRACT FOR SAID EMERGENCY REPAIR WITH CASS CONSTRUCTION, INC. WHEREAS, on February 19, 2009, the City of Chula Vista Department of Public Works Operation received a call from the owner of the residence at 1526 Grand Teton Court that a large hole appeared at the rear yard of his property; and WHEREAS, the sinkhole was caused by groundwater piping of the fill soils adjacent to the existing l8-inch RCP storm drain, therefore the groundwater flow caused distress and settlement of the fills soils wedge beneath the property, causing lateral relaxation and creep of the existing fill slopes, and consequently it triggered joint separation and root intrusion to the existing storm drain system; and WHEREAS, on April 7, 2009, the Director of Public Works received three (3) sealed bids for the project as follows: Contractor Proposal Amount Contractor Rauking Cass Construction, Inc. $125,553.00 First Negotiation Preference TC Construction, Inc. $198,435.00 Second Negotiation Preference West Tech Contracting. $276,125.90 Third Negotiation Preference WHEREAS, in accordance with the emergency provisions of Section 1009 of the City Charter, City staff contracted the services of Cass Construction, Inc. (General Engineering Contractor License No. 298336) for the repair; and WHEREAS, the storm drain and slope repair was completed on June 1,2009; and WHEREAS, the Director of Public Works and the City Manager agreed with the recommendation of staff on the necessity to proceed with the emergency repair because the pool and the house itself could sustain additional unnecessary damage and threatened the neighboring properties; and WHEREAS, this report represents the total expenditures for the repair. 6-6 NOW, THEREFORE, BE IT RESOLVED that the City Council of the City of Chula Vista does hereby accept the final report of expenditures for the "Emergency Storm Drain and Slope Repair at 1526 Grand Teton Court (DRI80)" and ratifies the actions of the City Manager and Director of Public Works for making and executing a contract for said emergency repair with Cass Construction, Inc. Presented by Approved as to form by ~~ Bart Miesfeld p f /L 7'(, City Attorney Richard A. Hopkins Director of Public Works 6-7