Loading...
HomeMy WebLinkAbout1977-04-19; City Council; 3310-5; Buena Vista Pumping station improvementsCITY OF CARLSBAD. \ f^ AGENDA BILL NO. 3310 - Supplement 5 _ • . < Initial: Dept.Hd. DATE: DEPARTMENT: _ Public Works _ _ |C. Mgr. Subject: •VISTA-CARLSBAD SEWAGE TRANSMISSION SYSTEM. PHASE I B IMPROVEMENTS TO BUENA VISTA PUMPING STATION ----- ...... ----- • . . .. . _ ------- f ...... ^. ........ _. .. . _ -------- Statement of the Matter Plans and Specifications for the construction of Phase I B improvements to the Buena Vista Pump Station have been completed by Brown and Caldwell. Consulting Engineers in accordance with Agreement No. VSD-108, the second supplemental agreement between the Vista Sanitation District (VSD) and the City of Carlsbad, dated September 3, 1975 and approved on September 2, 1975 by City Council Resolution No. 3740. A detailed description and cost estimate for the subject improvements are contained in the Staff Report attached as Exhibit "A" . The Plans and Specifications have been reviewed and approved by Public Works Staff. The total project estimate is $895,000. Carlsbad's share (15.5%) is $138,72"5. To this must be added the remaining portion of the buy in payment ($20,700) by which our percentage was increased to the present Is. 5%. Total estimated cost to Carlsbad then, is $159,425. Funds are- available in the City's Joint Sewer Construction Funds for this project, EXHIBITS: • A. Staff report - B. Resolution /^^Wapproving plans and specifications and authorizing the Vista Sanitation District to advertise for bids and award a contract. C. Plans and Specifications (on file - the City Engineer's Office). RECOMMENDATION: . . . Adopt Resolution No.^y^TV/ approving plans and specifications and • authorizing the Vista Sanitation.District to invite bids for. construction of the Buena Vista Pumping Station - Phase I'B Improvements. Council action 4-19-77 Resolution #5054 was adopted, approving plans and specifications and authorizing Vista Sanitation District to-invite bids. MEMORANDUM - April 11, 1977 TO: City Manager FROM: Public Works Administrator SUBJECT: BUENA VISTA PUMP STATION - Phase IB Improvements The City Council, on March 4, 1975 (AB 3310) accepted the project report and the Environmental Impact Report for the improvement of the Vista-Carlsbad trunk line and pump stations. The project included paralleling force mains, adding upgraded emergency power, replacing and upgrading pumping capacity, and structural modi- fications to the pump stations. Several units of the project have followed with council approving and authorizing each one. The latest council action was to approve, by minute motion on September 21, 1976, the modification of Phase IB of the project to call for replacement of existing pumps at the Buena Vista pump station on an accelerated schedule and authorize submittal of the project for EDA grant funds. We were not successful in obtaining grant funding for the project. With the changes which have been approved in their funding systems, the Vista Sanitation District (owners of 84.5% of pump station) now wishes to proceed with this phase. The drawings and specifi- cations have been reviewed by staff. NEED FOR PROJECT The Vista Sanitation District and City Staff feel the project is required at this time because, during peak flow conditions, all three existing pumps are required to operate. If one of these pumps were inoperative, there is danger of wastewater overflow into the Buena Vista Lagoon because of inadequate pumping capacity. Normal pump station operation provides for standby or reserve pumping capacity to be available in the event of sudden pump failure or a necessary repair. The proposed project will eliminate this undesirable condition and provide for the long range needs of this major pumping facility. Briefly, the project consists of the installation of three new pumps, piping, valves, instrumentation, electrical controls, improved ventilation facilities, and more effective isolation of the wet well. Dependable pumping capacity will be increased from about 7 MGD to 13 MGD upon completion of the projected construction. MEMO to City Manager -2-April 11, 1977 A copy of Brown and Caldwell's letter of December 7, 1976 is enclosed (Attachment III) which points out the full capacity of the pumping station cannot be utilized until upstream and down- stream trunk sewer projects are constructed. The peak flow through these gravity lines is in excess of 9 MGD. By adjusting an electronic controller, the maximum output of the new pumping units must be set to approximately the 90 percent level until the parallel sewers are available. The estimated total cost of the construction, resident engineering, printing of plans and specs, and all incidental expenses, including a contingency, is $895,000. Costs are to be shared according to ownership, with the City paying $159,425 and VSD paying $735,575. Attachment I is a final cost estimate that shows the development of project costs and the allocation between each agency. The costs include a final buy-in payment of $20,700 to be made by the City to VSD for an increase in capacity rights from 5.5% to 15.5% in the Buena Vista Pump Station. The City has sufficient funds available in the sewer construction account for their share of the expenses. While a slight potential for grant funds may still exist, staff feels that further delay is not warranted. Our evaluation of the situation is that the grant prospect is highly speculative, costly to the owners to prepare new reports for SWRCB evaluation, and any postponement of project construction will result in a prise increase due to inflation. The consultant has informed us that recent project bids have been substantially below estimate and the bidding climate is presently favorable for the owner. It is our recommendation that the City approve the project and authorize VSD to award an acceptable construction bid as soon as possible. Review of the proposed project schedule (Attachment II) shows that the project has a 550 day construction time with com- pletion estimated to be almost two years from now. The long contract period is necessary because of the long delivery time required for the pumps and highly specialized motor control instru- mentation equipment. The standby turbine generators now installed at the Buena Vista Pump Station are a key part of the overall improvement work that this project will bring to completion. The Environmental Impact Report (EIR) covering this project was accepted and certified by the City on March 4, 1975. A permit for the ongoing work and this final phase of the project was issued by the San Diego Coast Regional Commission on May 2, 1975. Ronald A. Beckman Public Works Administrator Attachments Attachment I FINAL COST ESTIMATE BUENA VISTA PUMPING STATION PHASE IB IMPROVEMENTS Costs: Estimated Construction Cost (1) $815,000 Resident Engineering 30,000 Project Administration, Printing, 7,000 Advertising, Legal, Miscellaneous Contingency (5%) 43,000 TOTAL PROJECT COST $895,000 Cost Sharing Vista Carlsbad Ownership (84.5) (15.5%) Construction $756,275 $138,725 Remaining Buy-in Payment (2) - 20,700 +20,700 Total $735,575 $159,425 (1) Includes $20,000 construction contingency (2) Refer to Section 4 of Agreement No. VSD 108 Attachment II PROPOSED PROJECT SCHEDULE BUENA VISTA PUMPING STATION PHASE IB IMPROVEMENTS Plans and specifications approved April 19, 1977 by Carlsbad Vista approves plans and specifications May 4, 1977 and authorizes bids Bids Opened - 2:00 p.m., Vista City Hall June 16, 1977 Contract awarded July 6, 1977 Construction Starts (550 days allowed) August, 1977 Construction completed February, 1979 BROWN AND CALDWELL CONSULTING ENGINEERS c c A • fi-'«r ft 3 " ;»4ija P? C. V J3VES PSD » i.a Pg T B LO.-SJO' P£ V L \V»*7T Pf December 6, 1976 Mr. C. B. Oldsen County of San Diego . Department of Sanitation Building 2, 5555 Overland Avenue San Diego, California 92123 Subject: BVPS - Design Capacity Dear Mr. Oldsen: S-396C In our July 16, 1976 letter to you which discussed design alternatives to the subject facility, we referred to,flow projections contained in the Sewerage System Improvement Program for the City of Carlsbad, draft report dated December,, 1975. This report is still in draft form, but has significant impact on our project as will be explained herein. Phase I improvements for the subject facility as stated in the October 1974 Project Report include a 24-inch force main installation and addition of two pumps for a total capacity of 13 mgd. The force main has been installed and the plans and specifications for the pumping station are essentially complete. The pumping station improvements differ from those stated in the project report as noted in our July 16, IS75 and September 3, 1976 letters. The capacity of this facility is essentially the same as that in the report, but is greater than that of the receiving 21-inch and 24-inch sewers. This fact was realized in the Project Report, Figure 5-1, and later during the force main design. The Carlsbad report proposes staged expansion to the sewerage system which would increase the capacity of the Buena Vista sewers by 1981. This expansion is necessary to accommodate the capacity of the Buena Vista Pumping Station as presently designed in the Phase IB improvements. This letter should serve as notice to Carlsbad and the Vista Sanitation District of the need for coordinating construction of the proposed sewerage facilities. Our dasign has adequately considered the operation of the new pumping units BRO-.VN AN'D CAIO.V5LL 150 SOUTH ARROYO PARKWAY, BIN 83. ARROYO ANNEX PASADENA. CA 91109 (213) 577-1020 VMLN'JT CREEK P,-TAD;NA EUC^Nc SEATTLE TUCSC.N w County of San Diego -2-December 6, 1976 during an interim period while the Carlsbad system is being enlarged.^ An electronic adjustment to the Mode 2 controller will be necessary to match pumping station discharge to the capacity of the receiving sewer, approximately 11.5 mgd. This adjustment is relatively simple and will not adversely affect the pumping units. If you have any questions on this, please contact us. Yours very truly , BROWN AND CALDWELL Michael G. Hoover '; MGHraa cc: Vista Sanitation District, Wayne Elliott City of Carlsbad, Ron Beckman BROWN AND CALDvVELL 150 SOUTH ARROYO PARKWAY. BIN 83, ARROYO ANNEX. PASAOENA. CA 91109 (213) 577-1023 sci£v~= AND ENGINEERING WALNUT'C-£EK PASADENA EUGENE SEATTLE TUCT:N 8 9 10 11 12 13 14 15 16 17 18 RESOLUTION NO. 5054 • A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF CARLSBAD, CALIFORNIA, APPROVING PLANS AND SPECI- FICATIONS AND AUTHORIZING THE VISTA SANITATION DISTRICT TO INVITE BIDS FOR: CONSTRUCTION OF THE BUENA VISTA PUMPING STATION - PHASE I B IMPROVEMENTS. WHEREAS, on September 3, 1975 the City of Carlsbad and the Vista Sanitation District entered into a Second Supplemental Agree- ment for the enlargement and addition to those Joint Facilities known as the Buena Vista Pumping Station; and WHEREAS, pursuant to said agreement plans and specifications have been prepared and filed in the Engineering Department of the City of Carlsbad for construction of the Buena Vista Pumping Station - Phase I B Improvements and are incorporated by reference herein; NOW, THEREFORE, BE IT RESOLVED by the Council of the City of Carlsbad, California, as follows: 1. That the above recitations are true and correct. 2. That those certain drawings and specifications for construction of the Buena Vista Pumping Station - Phase I B Improvements are hereby approved, and the Vista Sanitation District is authorized to advertise for bids thereon, award and enter into 19 a contract in response to the bids received as agent of, and on behalf of, the Vista Sanitation District and the City of Carlsbad 20 to accomplish the construction set forth in said Plans and Speci- fications. 21 PASSED, APPROVED AND ADOPTED by the City Council of the City of Carlsbad at a regular meeting held the 19th day of Apri 1 1977 by the following vote, to wit: AYES: Councilmen Frazee, Lewis, Packard, Skotnicki and Council woman Casler 22 23 24 25 NOES: None 26 ABSENT: None 27 28 ATTEST: 29 30 31 32 ROBERT C. FRAZEE, Mayor MAI^GAKET E. ADAMS^ 'City Clerk (SEAL)