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HomeMy WebLinkAbout1983-08-16; City Council; N/A; Change Order Calco Construction Buena Vista Lagoon Dredging ContractCIP JF CARLSBAD - AGENDA JILL AR# MTG 8-16-83 DEPT. ENG TITLE- CHANGE ORDER TO " CALCO CONSTRUCTION FOR BUENA VISTA LAGOON DREDGING CONTRACT DEPT. HP. R^-: C.\TV ATTY V/23 CITY MGtwHS** RECOMMENDED ACTION: Approve a change order to the Calco Construction contract for dredging the Buena Vista Lagoon to increase the quantities as requested by Department of Fish and Game. ITEM EXPLANATION: A contract was awarded to Calco Construction Company on May 12, 1983 to dredge the Buena Vista Lagoon on a unit price basis in an estimated amount of $779,740. The City awarded the contract on behalf of the Department of Fish and Game who had specified the work to be done, provided the necessary funds, and approved the terms of the contract as it was to be awarded. It has now become necessary to modify the original set of plans for the project dictated by the experiences gained during the course of construction and to maximize the benefits for the funds available. Department of Fish and Game, by letter of August 5, 1983 (Exhibit 1), has authorized the issuance of a change order to Calco to proceed with a plan based upon revised figures as furnished by Calco (Exhibit 2). The changes essentially increases the quantity of dredging to be done and also provides for the construction of a parking and visitation point behind the fence at the southeast corner of the lagoon. The intent of Department of Fish and Game is to build as many islands as is feasible with the funds available under the present contract. The approved plan was delivered to the City on August 15,1983. The contract quantities are to be'changed as follows: Item Mobilization Dredge & Export Construct Islands Road & Parking Area Fence FISCAL IMPACT: Previous Total $123,200 552,500 102,000 -0- 22,040 $799,740 Proposed Total $123,200 631,969 190,698 40,000 6.300 $992,167 Department of Fish and Game deposited $990,000 with the City for the dredging contract. As of this date, an additional $62,390 has been earned on this account for a total funding of $1,052,390. The expected construction contract costs are $992,167 leaving $60,223 for engineering and supervision costs, in- house costs, and professional services. These funds are solely Department of Fish and Game funds. No City funds are involved. EXHIBITS: 1. Letter from Department of Fish and Game dated August 5, 1983. 2. Letter from Calco dated August 12, 1983. STATE OF CALIFORNIA—THE RESOURCES AGENCY GEORGE DEUKMEJIAN, Governor DEPARTMENT OF FISH AND GAME 245 W. Broadway, Suite 350 Long Beach, CA 90802 (213) 590-5113 August 5, 1983 - ^ 08/983 Mr. Roy L. Kackley, Jr. City of Carlsbad 1200 Elm Avenue Carlsbad, CA 92008-1989 Dear Mr. Kackley: It has become necessary to modify the original set of plans for the dredging and construction of islands at Buena Vista Lagoon. Elevations and projected quantities were based on an early contour map. As construction proceeded, these elevations were shown to be in error. This has resulted in different quantities of material than those estimated in the original set of plans. Calco construction has prepared a revised plan which would raise the island elevation to 11.5 from 10.5, raise the channel elevation to 1.7 from 1.2, and create two additional islands. The payment to Calco for these revised quantities will remain within the available funds. We approve the revised figures submitted by Calco as Exhibit "A" - Sheet 3/4 in their letter of July 27, 1983. We authorize the City of Carlsbad to issue a change order to Calco to proceed with the plan based on these revised figures. Sincerely, Fred A. Worthley Jr. Regional Manager Region 5 EXHIBIT 1 POBOX 1171 CARLSBAD, CA. 92008 6i9-434-3isi August 12, 1983 City of Carlsbad 1200 Elm Avenue Carlsbad, Ca. 92008 Reference: Excavation - Buena Vista Lagoon Contract Change Order - Increased Quantities Attention: Roy L. Kackley, Jr. City Engineer Dear Roy, This letter is to confirm the information reviewed in the meeting Wednesday August 10, 1983 between Calco Construction, California Fish and Game and the City of Carlsbad. Referring to our letter of July 27, 1983 and the meeting at your office July 29, 1983 in which we were directed to proceed with alternate 3 (Exhibit A - Sheet 3 of 5), we have completed the revised drawings for Buena Vista Lagoon and the original mylar is now with California Fish and Game to obtain official approval. We are proceeding with all haste to complete the excavation for said revised plans prior to October wildlife migration. The schedule is extremely tight and can only be completed if the tropical rains now hitting Southern California do not inflict severe damage. The calculated projected final quantities are very close but slightly different to the estimate "submitted, July 27, 1983. Enclosed herewith is a tabulation of the estimate of July 27, 1983 and calculated Projected Final Pay (Exhibit "A"). The change order executed in accordance with Section 7 - Page 13 of the contract should be based upon these calculations. I have submitted under a separate cover, a suggested procedure for verifying final quantities. Cont'd EXHIBIT 2 Patge 2 August 12, 1983 It is absolutely critical that we receive written confirmation of the verbal instructions to proceed very soon if work is not to be delayed. It is my opinion that all authorizations to proceed with the revised plan is contained in the original contract with the authority to extend quantities to 125% of the Engineer's Estimate, except: 1. Extension of work outside original excavation limits. (Northwest corner) 2. Extension of construction of Island beyond the 125% for the agreed price of $2.00/cy plus lump sum for construction of work road for dragline. It is absolutely essential to begin construction of the work road for extra Island within the next 10 days if we are to complete work before the wildlife migration begins this season. Regards, Wm. A. Corn CALCO PO BOX 1171 CARLSBAD, CA. 92008 Page 3 August 12, 1983 EXHIBIT "A" — Sheet 3/5 Projected Final payment based upon target for final quantities for revised plan for Buena Vista Lagoon, prepared by Calco Construction. 1. Mobilization if 2. Dredge & Export Estimate = 98,40Qcy @ 6.50 Calculated = 97,226cy @ 6.50 , 3. Construct Island Contract Unit Price - 125% per Sec. 3-2.2.1 Estimate = 62,500cy @ 2.00 Calculated = 62,500cy @ 2.00 Construct Island - Agreed Price - over 125% Sec. 3-2.2.3 - Estimate = 25,500cy (§2.00 Calculated = 32,849cy @ 2.00 Plus ^ Construct work road @ agreed price Estimate = $30,000 Calculated = No Change 4. Not Awarded 5. & 6. Fence 1,000' @ 6.30 Extra Work - Parking Payment to Calco Administrative Cost City of Carlsbad Total Expenditure Total Allocation available Estimates Calculated $123,200 639,600 125,000 51,000 30,000 6,300 975,100 10,000 $985,100 60,000 $123,200 631,969 125,000 65,698 30,000 6,300 982,167 10,000 $992,167 50,000 $1,045,100 $1,042,167 $1,045,000 CALCO PO BOX 1171 CARLSBAD, CA. 92008 .' <-~ \ V:??.| ,> i i d T CAST C7 (j