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HomeMy WebLinkAboutCHANGE ORDER - AGREEMENT MISC - BISHOP-BROGDEN ASSOC INCCHANGE ORDER NO. PROJECT TITLE: Gravel Pit Plan for Augmentation and Boxelder and Coy Ditch change of use CONTRACTOR: Bishop-Brogden Associates, Inc PROJECT NUMBER: PO 9112133 DESCRIPTION: 1. Reason for change: Expanded scope to include unanticipated tasks associated with original scope of work 2. Description of Change: See attached 3. Change in Contract Cost $29,900 4. Change in Contract Time: No change in contract time ORIGINAL CONTRACT COST $_26,700 — TOTAL APPROVED CHANGE ORDER TOTAL PENDING CHANGE ORDER _20.500 _29,900_ _ TOTAL THIS CHANGE ORDER TOTAL % OF THIS CHANGE ORDER 1. 1 Z'/,> TOTAL C.O.% OF ORIGINAL CONTRACT ADJUSTED CONTRACT COST $ _77,100 (Assuming all change orders approved) ��L2 ACCEPTED BY: DATE: Contractor's Representative BY: DATE: Cr BY: 'L Project Manager REVIEWED BY: DATE: Title: APPROVED BY: DATE: Title: APPROVED BY: DATE: Purchasing Agent over $30,000 Contractor Project File Architect Engineer Purchasing -;1 i_ 70 -f I o. 2 q c, oS 421 B MEMORANDUM BBA water consultants BISHOP-BROGDEN ASSOCIATES, INC. To: Daylan Figgs From: Mike Sayler Subject: Second Amended Scope of Work for Gravel Pit Plan for Augmentation and Box Elder and Coy Ditches Change of Use Job: 9625.03 Date: June 13, 2012 This memorandum summarizes a second revision to the scope of work for the Gravel Pits Plan for Augmentation and Box Elder Ditch shares change of use. We have previously provided an estimate of the costs for Phase 1 of the work, which will take us through completion of an engineering report and submission of a water court application. That scope of work was previously approved in PO #9112133 on April 14, 2011 for $26,700, The purchase order was changed in Change Order 1 on December 16, 2011 for $20,500 more work. Since that time, several additional tasks have been identified which have been added to this work. A summary of the additional tasks and the estimated additional costs to completed the Phase 1 work is as follows. 1. Submit a 2012-3 Substitute Water Supply Plan (SWSP). This fall we anticipate subnutting another request to the Division of Water Resources (DWR) for an extension of the SWSP for the Resource Recovery Farm. This task will include calculating the augmentation requirements for next year, coordinating replacement supplies with City staff, and preparing a letter report for submittal to the DWR. In addition, this year, you have asked as to review the possibility of making excess Box Elder water available to LPAC in exchange for storage. We have estimated the amount of storage that would be required, we well as the amount of excess Box Elder water that might be available to LPAC. We estimate the cost for this task, including the work already done in determining LPAC storage requirements, to be approximately $4,000. 2. We have encountered various tasks related to the Coy Ditch water that were not included in our previous scope of work. These included attending the Hoffman deposition and assisting legal counsel, interviewing Mr. Hoffman at his home, additional work in evaluating the ELCO change of use, extending the study period back to 1911 in order to address recent lack of use issues,.and . modeling the yield of both 5 and 10% ownership of the water right. The costs for these additional tasks was approximately $5,700. 3. In order to address recent lack of use issues with the Box Elder Ditch shares, we extended the study period back to 1911 and recalculated the historical use for this longer period of records. The costs for this additional work was approximately $4,400. 4. We have reviewed issues related to possible high water table conditions that might potentially affect the transferable yield of both the Coy and Box Elder Ditch shares. This included reviewing seed mixes and rooting depths, understanding the source of storm water inflows to the Coy property, analyzing survey data from the Box Elder lands, and running water budgets with possible reductions for future consumptive use of ground water. The costs of this task was approximately $4,100. 5. Attend two extra meeting beyond the two meetings we had previously planned. One of these meetings has already occurred and the other will be held when our draft report is completed. This will result in a total of four meetings rather than the two budgeted last December. We estimate the cost of this task will be $3,400. 6. We have completed several additional modeling scenarios with our planning model to determine Daylan Figgs Page 2 June 13,2012 how much storage and leased water will be needed in the future based upon several additional scenarios for future exposed ground water, recharge operations, Box Elder and Coy Ditch yields. The cost of these additional modeling scenarios has been approximately $3,200. 7. We have worked on lagging depletions from the Cottonwood Hollow/Wren pit, which has required additional modeling. Initially it was thought these pits could be considered to cause instantaneous depletions to the stream. However, due to the DWR's new policy on headgate wells, it will not be possible to claim instantaneous depletions any longer. The cost of this task is approximately $1,000. 8. We are reviewing various wetlands related issues for the RiverBend Ponds site in order to determine if there are additional depletions from this site that need to be included in the plan for augmentation. The cost of this task is approximately $1,700. 9. We will include in the augmentation plan the ability to allow the plan to be administered based upon varying water levels in the pits and varying exposed ground water areas. This will allow the City to reduce its augmentation requirements in the future if the water levels in the ponds can be decreased. The cost of this task is approximately $2,400. Based upon these additions to the previous Scope of Work, we estimate the total additional costs to complete Phase I of the gravel pit plan for augmentation and the Box Elder and Coy Ditch changes of use to be $29,900.