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Home My WebLink AboutAGENDA BACKUP 09-21-95 Central Contra Costa Sanitary District BOARD OF DIRECTORS PAGE 1 OF 2 BOARD MEETING OF September 21, 1 995 NO. 4. CONSENT CALENDAR a. AUTHORIZATION FOR P.A. 95-15 (ALAMO) TO BE INCLUDED IN A FUTURE FORMAL ANNEXATION TO THE DISTRICT DATE September 13, 1995 TYPE OF ACTION SUBJECT ACCEPT ANNEXATION FOR PROCESSING SUBMIIJED B't H II uenms a Associate Engineer INITIATING DEPT-lDIV. Englneenng Departmentl Infrastructure Division PARCEL NO. 95-15 AREA OWNER/ADDRESS PARCEL NO. & ACREAGE REMARKS LEAD AGENCY! CCCSD Alamo G.A. and S.A. Neighbors (77D1) 20 Mt. Rushmore Place Clayton, CA 94517 (187-120-022) 0.29 AC. Existing house with a failing septic system; must connect to the public sewer system. Project is exempt from CEQA. RECOMMENDATION: Authorize P.A. 95-15 to be included in a future formal annexation. REVIEWED AND RECOMMENDED FOR BOARD ACTION INITIATING DEPT.IOIV. d)t( 00 1302A-7/91 DH JSM RAB , \ , \ , , , , , ' , , \ \ , \-1.-.....' , '''' \ , "1>' , , \,~ \ , "9" , , ,..... \ , , ,<", , " , , ,\ , \ , , \ \ , ,\ , \ , \ \ \ 6'\ \ \~\ \ \ \ , , \, , \ , \ , , , \ , \ " \ \ ., \,' ,~\ \i ,~, 1\ \ '. '. , , \, \ \ \ \ , , \ \, \ \ \ \ , , , , .'~~ \ I PROPOSED ANNEXATION P.A. 95-15 Central Contra Costa Sanitary District BOARD OF DIRECTORS PAGE 1 OF 1 BOARD MEETING OF September 21, 1995 NO. 4. CONSENT CALENDAR. b. DATE SUBJECT ACCEPT CONTRACT WORK FOR CSOD FACILITY RECONFIGURATION PROJECT, DP 9023, AND AUTHORIZE FILING OF THE NOTICE OF COMPLETION. Se tember 18 1995 TYPE OF ACTION ACCEPT CONTRACT WORK SUBMITTED BY INITIATING DEPT.lDIV. Tom Godsey, Associate Engineer Collection System Operations ISSUE: Construction has been completed on the CSOD Facility Reconfiguration Project, DP 9023, in Walnut Creek, and the work is now ready for acceptance. I BACKGROUND: The District initiated a capital project to reconfigure the CSO Yard in 199q in anticipation of the loss of approximately 1 acre (22 % of the usable of corporation yard area) due solely to the CAL Trans 1680/24 Project. The District's project included the purchase of additioral property and the design of replacement facilities including a Vehicle Maintenance Shop, retaining walls, grading, paving, fencing, and landscaping. Negotiations are underway with CAL Trans regarding reimbursement of the District for its costs. CAL Trans has paid $798,000 as part df a I negotiated settlement for the Right of Entry. The CSO Yard was an existing, non-conforming use, under the City of Walnut Creek's Gen~ral Plan. The magnitude of the Reconfiguration Project, which is occasioned solely by the CAL Tr~ns work, triggered the need for obtaining a General Plan Amendment and a Conditional Land Use Permit. The planning and design work has been completed under the City of Walnut Creek plan and Design Review processes adding both time and cost to the project. Additional information on the project is presented on pages GI-12 and GI-13 of the Capital Improvement Budget. On February 28, 1994, the Board of Directors authorized the award of a contract for constructjon of the project to N. E. Carlson Construction Co, of Brentwood. The Notice to Proceed was issued on April 26, 1994, with a specified completion date of August 24, 1994. The project scope was revised and the completion date extended to November 10, 1994. Inclement weather subsequently delayed completion of the additional work until June 6, 1995 when the work was substantially completed. The remaining work consists of maintenance items which do not affect the project acceptance. The total authorized budget for the project including the cost of engineering design, contr~ct construction and administration, inspection, community relations and testing services is $1,537,000. A detailed accounting of the project cost will be provided to the Board at the time of project closeout. It is appropriate to accept the contract work at this time. RECOMMENDATION: Accept the contract work for the construction of the CSOD Facility Reconfiguration Project, DP 9023, and authorize the filing of the Notice of Completion. RE~EWEDANDRECOMMENDEDFORBOARDAcnON INITIATING DEPT.lDIV. u7v 1302A-7/91 TG JAL ~ Central Co~tra Costa Sanitary District BOARD OF DIRECTORS PAGE 1 OF ,2 B..QARD MEE11NG Of ::septemoer "L 1, 1 995 NO. 7. ENGINEERING a. SUBJECT AUTHORIZE THE GENERAL MANAGER-CHIEF ENGINEER TO EXECUTE A $200,000 CONSTRUCTION CONTRACT CHANGE ORDER ON THE PLEASANT HILL RELIEF INTERCEPTOR PROJECT, PHASE 3 (D.P. 5031), FOR DIFFERING SITE CONDITIONS NEAR K-MART August 21, 1 995 TYPE OF AGTJQti. ' AU I HORIZE CHAN~E ORDER DATE SUBMITTED BY Charles A. Canepa, Assistant Engineer INITIATING DEPT./DIV. Engineering Department/Infrastructure Divisici>n ISSUE: Authorization by the Board of Directors is required for the General Manager-Chief Engineer to execute a construction contract change order in an amount greater than $50,000. I BACKGROUND: Phase 3 of the Pleasant Hill Relief Interceptor Project (D.P. 5031) includes the construction of 4,900 feet of 48-inch sewer line and 5,200 feet of reclaimed water line. The majority of the sewer line is to be installed by microtunneling. The alignment of the pipeline' is generally along the west bank of Grayson Creek from Chilpancingo Parkway to Taylor Boulevard. The Notice to Proceed for construction was issued to the Contractor (McGuire and Hester) on June 5, 1995, and construction commenced at the site next to the K-Mart Shopping Center parking lot. Towards the end of July, a problem developed due to differing site conditions resulting in increased costs and delays .to the Contractor's work. A brief chronology is as follows~ On July 28, 1995, the tunneling machine encountered wood debris approximately 400 feet into ~he 725-foot bore and for approximately 70 feet thereafter as evidenced by the presence of wqod fragments in the soils removed during the tunneling operation. On July 29, 1995, the cutting head of the machine became clogged, causing the Contractor to Iqse all ability to control the machine. The cause of the clogging was thought to be wood debtis. Various attempts by the Contractor to re-start the tunneling operation failed. The operation ""as discontinued until a resolution could be determined. The boring head was located approximately 2:50 feet from the receiving pit (near the McDonald's Drive-thru) underneath the K-Mart parking lot adjacent to Grayson Creek. I On July 31, 1995, the Contractor and District staff decided to excavate to the boring head, approximately 25 feet deep, to confirm the nature of the obstruction. During the excavat,on process, the Contractor encountered groundwater, large tree roots and stumps, and numerous latge boulders below the surface. It has been learned that a rock quarry occupied the site before it vjtas abandoned to accommodate the Shopping Center. It appears that a small side stream from ~he quarry site crossed the interceptor alignment at the approximate location of the boring head. The former small stream bed was apparently backfilled with rocks and debris many years ago. The removal of the boulders, tree roots, stumps, and copious groundwater made the excavation process extremely slow and arduous. REWEWEDAND RECOMMENDED FOR BOARD AcnON CAC f/If w INITIATING DEPT.lDIV. (3tF2- 1302A-7/91 JSM RAB AUTHORIZE THE GENERAL MANAGER-CHIEF ENGINEER TO EXECUTE A $200,000 CONSTRUCTION CONTRACT CHANGE ORDER ON THE PLEASANT HILL RELIEF INTERCEPTOR PROJECT, PHASE 3 (D.P. 5031), FOR DIFFERING SITE CONDITIONS NEAR K-MART SUBJECT PAGE 2 OF 2 DATE AUTHORIZE CHANGE ORDER On August 1, 1995, the Contractor uncovered the boring head and confirmed that pieces of wood had accumulated on the face of the boring machine, clogging the slurry recirculation system. The Contractor removed wood fragments and mud from the cutting face and attempte~ to re-push the pipe. The attempt was unsuccessful. Apparently, material had squeezed and hardened around the boring head and nearby sections of pipe, preventing any further movement~ The Contractor and District staff then decided to remove the boring head and to complete the remaining 250 feet of pipe using a conventional open cut method. Because of the differing site conditions (unknown boulders, roots, and stumps) and the need tq minimize disruptions of the K-Mart Shopping Center and the nearby McDonald's Restaurant, the Contractor agreed to continue the work expeditiously. Records of all extra costs were kept on a time and material basis. The total cost for this change order is $200,000. The Contract will also be extended by 22 calendar days. RECOMMENDATION: Authorize the General Manager-Chief Engineer to execute a $200,00Q contract change order with McGuire and Hester for extra costs associated with differing site conditions encountered in the K-Mart Shopping Center parking lot. 13028-7/91 Central Contra Costa Sanitary District BOARD OF DIRECTORS PAGE 1 OF 1 BOARD MEETING OF September 21, 1995 NO. 7. ENGINEERING b. SUBJECT DATE September 18, 1995 AUTHORIZE $57,000 FROM THE SEWER CONSTRUCTION FUND TO THE GENERAL IMPROVEMENTS PROGRAM CONTINGENCY ACCOUNT TYPE OF ACTION SUPPLEMENTAL AUTHORIZATION SUBMITTED BY John J. Mercurio, Administrative Analyst INITIATING DEPT./DIV. Engineering Dept.lPlanning Division ISSUE: Budget authorizations from the Sewer Construction Fund to Capital Improvement Prog~am accounts may only be made by the Board of Directors. BACKGROUND: The recently approved allocation from the General Improvements Contingercy Account for completion of the Emergency Operations Centers will deplete the account. Sinoe it is early in the fiscal year, it is likely that other contingency allocations will be needed. . In the past, the contingency account has been funded at five percent of projected bu~get allocations for the fiscal year . However, since budgeted allocations in the Generallmprovem~nts Program have declined over the past few years, the five percent criterion results in a very s~all amount ($43,000 this year). It is proposed that in the future the balance of program contingency accounts be set at the five-percent-of-projected-allocations level or $100,000, whichever is greater. To achieve this balance for the current fiscal year, staff recommends a suppleme~tal authorization of $57,000. RECOMMENDATION: Authorize $57,000 from the Sewer Construction Fund to the Genieral Improvements Program Contingency Account. JMM DJC RAB RE~EWEDANDRECOMMENDEDFORBOARDAcnON v lJf~