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HomeMy WebLinkAbout87-1106 Airlite 1a and 4a Well repairs change Order No.1 ' • ELGIN, ILLINOIS AIRLITE STREET 1A ? 4A WELL REPAIRS CHANGE ORDER NO. 1 SCOPE: This Change Order No . 1 covers the necessary work to pull and inspect the pump and motor in well 4A as noted below in this Change Order No . 1 . The general contractor operating under contract to the City of Elgin is Layne-Western Company , Inc . of Aurora , Illinois 60506. REASONS FOR CHANGE: This change order is required in order to determine why the pumping production has dropped with well 4A at the Airlite Street Water Treatment Plant and to prevent possible damages to the pump and motor . SUMMARY OF CHANGES IN CONTRACT AMOUNT: The amount of the contract will be revised as follows : ITEM ADD Pull and inspect the pump and motor at well site $7 ,000.00 4A; Lump Sum. The City Council at its Committee of the Whole meeting on September 9, 1987, authorized Layne-Western Company , Inc . , to pull the pump and motor located at well site IA at a cost of $7,700.00. In a letter dated September i6 , 1987, Layne- Western indicated a cost of approximately $7,000 .00 to pull and inspect well 4A . The Water Department ' s account budget 400--98B-9908, annual well repair , contains $40,000, of which repairs for both Airlite 1A and 4A would be included . The authorization for the inspection of well 4iA was approved at the Committee of the Whole meeting on October 14 , 1987. By reason of this Change Order No . 1 , the contract for the Airlite Street Well Repairs will be increased in the amount of Seven Thousand Dollars ( $7,000 .00) , the total contract value being Fourteen Thousand Seven Hundred Dollars ($14,700 .00 ) . OTHER CONTRACT PROVISIONS: All other contract provisions shall remain the same . • CHANGE ORDER NO. 1 October 23, 1987 Page 2 / Agreed to this V day of AJO _ , 1987, Recommended : WATER DEPARTMENT By* .d4111,/ tet Date: ,Or'l ov." .; 14 /797 Ader Accepted : LAYNE—WESTERN COMPANY, INC. Party of the Second Part (Contractor ) By: Title: Date: .9e7 Approved : CITY OF ELGIN Party if the F - rst Part (Owner ) .14( BY: Al, T e Date: 4 , / A /p/7 MEMORANDUM TO: Mayor and Members of the City Council FROM: City Manager DATE: October 1, 1987 SUBJECT: 4A WELL REPAIRS PURPOSE: This memorandum will provide the Mayor and Council with information to consider the subject repairs. BACKGROUND: On September 11 , 1987, well 4A, located at the Airlite Street Water Treatment Plant, was removed from service. It was determined through evaluation of flow tests that the production of this well had dropped off to approximately 0.6 million gallons per day from an initial 1.05 million aallons per day. Water Department records indicate that the pump and motor were last serviced in 1985 due to the production of the well dropping off substantially. Continued use of well 4A with its llmited production would most likely cause additional damages to both the pump and the motor . Due to the low production rate of well 4A, it is believed that the velocity of the water is so low that it does not keep the sand in suspension, and it drops and further clogs the pump. FINAN's;AL IMPA"T: The City Council at its Committee of the Whole meeting on Wednesday, September 9, 1987, authorized Layne-Western Co. , Inc. , to pull the pump and motor located at well site lA at a cost of $7,700. In a letter dated September 16, 1987 (attached) , Layne-Western indicated a cost of approximately $7,000 to pull and inspect well 4A. The Water Department 's account budget 400-988-9908, annual well repair , contains $40,000, of which repairs for both Airlite lA and 4A would be included. Page Two RECOMMENDATION: It is recommended that the City Council accept Layne-Western's proposal to pull and inspect well 4A on a time and material basis at an approximate cost of $7,000. Layne-Western has consistently been the lowest bidder in every bid we have taken regarding well repairs as evidenced by the bids received for pulling well 1A. Layne-Western can simply move from well IA to well 4A, thereby saving move-in costs. The City of Elgin has used Layne-Western on numerous occasions for well repairs and has found their expertise invaluable. Council will be kept informed on recommended repairs and/or improvements. y Manager KMF:jk mem5092902 3000/19a Attachment I . Company, Inc . � a WATER SUPPLY SERVICES ilL42•,•>. WATER WELLS • LAYNE PUMPS • TEST DRILLING • WATER TREATMENT EQUIPMENT 721 West Meek Avow.. • Aimee, IMM,.i •` 312 S 7.D41 September 16 , 1987 _ ' City of Elgin 150 Dexter Court - Elgin, IL 60120 ATTENTION : Mr. Kurt Eshelman Water Plant Superintendent SUBJECT: Airlite Street Plant Well No . 4A Dear Mr. Eshelman : In our meeting of September 14 , we discussed at length the deteriora- tion of pumping capacity of the submersible pump installed in Well No . 4A. We speculated that the bowl assembly was worn, possibly due from sand pumping which has been a phenomenon with this well since approximately 1980 . The pump was pulled in 1984 and again in 1985 due to damage caused from operation with excessive clearances evi- dentally from water born sand . Our records indicate that the pump consists of a Baker Monitor pitless adapter; 976' of 10" Schedule 40 column pipe in random lengths ; two Lakewood column check valves ; approximately 980' of No . 2 , 3C , 5000 volt submersible cable ; two airlines--one stainless steel , one plastic ; Byron Jackson 12MQH9L2-11 stage all bronze submersible bowl assembly ; and Byron Jackson 350 H . P. , 3/4/60/2300 volt 16" Type H submersible motor. The column pipe was coated in 1984 with epoxy paint which was touched up during the work in 1985 . The 350 H .P. motor was new in 1985 , the previous 300 H . P. motor having been in service since 1973 . Should you wish to pull this pump for inspection, I would suggest that there would be a cost savings if the job could be scheduled to dovetail with the pulling of the Well No . lA pump. We would propose to do this work on a time and material basis and I would estimate a cost for the pulling and inspecting at approximately $7 , 000. 00. Our current union labor contract expires September 30, 1987 and a rate increase is antici- pated. A five percent speculative rate increase has been included in this estimate . I am assuming that access may still be gained to the jobsite by means of the Blue Moon parking lot , that parking spaces may be used for temporary pipe storage , and guy line stakes may be driven within the parking lot islands . This was the situation during the 1985 repair. KANSAS CITY • WICHITA • GARDEN CITY • OMAHA • AMES • AURORA • ST. LOUIS • DENVER City of Elgin Page 2 ATTN : Mr. Kurt Eshelman SUBJ : Airlite Street Plant Well No . 4A September 16 , 1987 We uld be moving to the lA jobsite during the week of iptember 21 . Th you for the opportunity of presenting this proposal . I look forward to meeting with you during the work on the lA well . Very truly yours , LAYNE-WESTERN COMPANY , INC . C C . F. Behrens CFB/lb