HomeMy WebLinkAboutMemo - Mail Packet - 9/13/2016 - Memorandum From Jon Haukaas And Owen Randall Re: Update On Michigan Ditch ProjectUtilities
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700 Wood Street
PO Box 580
Fort Collins, CO 80522
970.221.6700
970.221.6619 – fax
970.224.6003 – TDD
utilities@fcgov.com
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Michigan Ditch Tunnel Project 8/25/2016
Summary Budget Table
Original Contract Projected Final Cost
Design & Construction Services $1,405,512 $1,575,583
Tunnel Construction $4,615,244 $4,168,496
Headwall, Grading & Associated Construction $1,211,020 $1,172,412
Projected Total Cost: $7,231,776 $6,916,491
Staff project management $72,000 $84,000
Budget Contingency: $912,919 $1,216,204
Project Budget $8,216,695 $8,216,695
M E M O R A N D U M
DATE: September 2, 2016
TO: Mayor and City Councilmembers
THRU: Darin Atteberry, City Manager
Kevin R. Gertig, Utilities Executive Director
FROM: Jon Haukaas, Operations Manager - Water Engineering & Field Services
Owen Randall, Chief Engineer
RE: Update on Michigan Ditch project
Bottom Line
The construction of the Michigan Ditch Tunnel project is on/under the projected budget, however
the schedule has been extended by approximately three weeks due to the hardness of the rock
excavation. The tunneling has progressed well past the half way point; as of 8-31-2016 they had
reached 483 feet of the 760 feet total length. Inlet and outlet headwall work has been advanced from
October to August to create efficiencies and hold closer to the anticipated final completion schedule.
Current completion date is estimated as November 6.
Budget
The initial budget approved for the Michigan Ditch Tunnel project is $8,216,695. We expect the
expenses for consulting services to increase slightly due to the need for additional analysis and
oversight as the project has encountered unanticipated rock conditions and adjustments were made.
We also advanced several related portions of the project and perform work in the summer months
rather than in the late fall. While the tunneling timeline has extended, advancing these other
components and other efficiencies developed throughout the project is anticipated to bring the
project to completion under budget.
DocuSign Envelope ID: 1DAB145A-BE71-4E99-90F3-CB31045C04AE
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Daily Tunnel Advance (ft)
Elapsed Time (days)
Michigan Ditch Average Daily Progress
Daily 5-day Average 10-day Average 20-day Average
Original Schedule
Start Finish
Tunneling 23-Jun 22-Aug
Headwalls, etc 9-May 21-Oct
Tunnel Lining 23-Aug 11-Oct
Anticipated Completion Date October 11
Current Revised Schedule
Start Finish
Tunneling 15-Jun 25-Sep
Headwalls, etc 9-May 4-Nov
Tunnel Lining 26-Sep 27-Oct
Anticipated Completion Date November 4
Sept Oct Nov
Activity May June July Aug Sept Oct Nov
Activity May June July Aug
Schedule
The hardness of the rock has had the greatest impact on the schedule to complete the project. The
initial completion date was anticipated to be October 18. This was based on being able to mine at a
rate of 20 feet per day. The progress has varied from 1 foot per day to 20 feet per day (see progress
graph below). The center section of the tunnel is furthest from the investigation bores and has a
lower confidence level of detail. As the tunneling progresses, it will merge back into the alignment
of our investigatory bore and we can anticipate progress similar to the beginning of the tunnel with a
high degree of confidence.
The project has experienced a number of mechanical related delays over the past week. Another
lens of hard rack, the need to replace the gauge cutters (the outer rock cutting wheels), and the need
for additional service on the generators all contributed to extended down time. The revised schedule
has the tunnel completed and ready for the delivery of water on November 6.
CC: Carol Webb, Water Resources & Treatment Operations Manager
Mark Kempton, Water Production Manager
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