Title
GLWA-CS-165 Change Order No. 1
Professional Services for Route Study, Condition Assessment and Design-Build Contractor Oversight for 96-Inch Water Main Relocation
Body
Agenda of: April 25, 2018
Item No.: 2018-688
Amount: N/A
TO: The Honorable
Board of Directors
Great Lakes Water Authority
FROM: Sue F. McCormick
Chief Executive Officer
Great Lakes Water Authority
DATE: April 4, 2018
RE: Contract No. GLWA-CS-165 Change Order No. 1
Professional Services for Route Study, Condition Assessment and Design-Build Contractor Oversight for 96-Inch Water Main Relocation
Vendor: CH2M Hill Engineers, Inc.
MOTION
Upon recommendation of Cheryl Porter, Chief Operating Officer - Water and Field Services, the Board of Directors (Board) of the Great Lakes Water Authority (GLWA), authorizes the Chief Executive Officer (CEO) to enter into Contract No. GLWA-CS-165 Change Order No. 1, “Professional Services for Route Study, Condition Assessment and Design-Build Contractor Oversight for 96-Inch Water Main Relocation” with CH2M Hill Engineers, Inc. for a time extension of 365 days at no additional cost for a total contract duration of 730 days; and authorizes the CEO to take such other action as may be necessary to accomplish the intent of this vote.
BACKGROUND
CH2M Hill Engineers, Inc. (CH2M) started work on March 6, 2017, for engineering services related to the relocation of the 96-inch water transmission main outside of the closed G&H Industrial Landfill site. It was initially planned that the relocation of the 96-inch water transmission main would be conducted in two phases. Phase 1 involved installing two new tie-in connections with new isolation valves on the existing 96-inch water main. The new isolation valves/tie-ins would be located upstream (north) and downstream (south) of the closed G&H Industrial Landfill site. These new tie-ins would be made using live-taps and would serve as future connections for the new 96-inch relocated main. The two new valves were to be used to isolate the 96-inch main between the Rochester Booster Pump Station and the North Service Center pumping/reservoir facility. This section of main would have been dewatered and inspected to assess its condition. Phase 2 involved constructing the approximately 2.5 miles of relocated 96-inch main and connecting it to the two tie-in locations installed during Phase 1.
As GLWA and CH2M evaluated the technical feasibility and risks associated with live tapping the 96-inch water main, which is prestressed concrete cylinder pipe (PCCP) with a relatively thin embedded steel cylinder, we mutually determined that there was excessive risk associated with live tapping the 96-inch PCCP and that other alternatives to tie into the existing main were needed. The alternatives considered for tying into the existing 96-inch water main have been referred to as “implementation strategies”. Evaluation of the implementation strategies have required significant engagement from GLWA’s member partners because of impacts to their level of service during construction. Similarly, as more information about the contamination in the closed landfill and previous stockpiling of excessive soils on top of the 96-inch transmission main became apparent, GLWA determined that it was best to first construct the new, relocated main, tie it into the existing main, and lastly abandon the 96-inch main within the limits of the closed landfill. Therefore, the existing 96-inch transmission main beneath or near the closed landfill would not be taken out of service for a condition assessment due to the risks associated with the main developing leaks or breaks if it was depressurized.
These decisions set forth a new direction for the project. As a result, GLWA operations and engineering has directed CH2M to continue to execute the on-going tasks listed in Table 1 because of the importance associated with (a) getting the 96-inch main out of a contaminated landfill site, thereby protecting public health, and (b) providing redundancy that is absent today to our customers served off the 96-inch main between Romeo and North Service Center.
|
Table 1 Contract No. CS-165 On-Going Major Tasks |
|
On-Going Major Tasks |
Status |
Target Date |
|
1 |
Continued agency coordination (Environmental Protection Agency (EPA), Michigan Department of Environmental Quality (MDEQ), Macomb County Department of Roads (MCDR), Road Commission for Oakland County (RCOC), Oakland County Water Resources Commissioner (OCWRC), Macomb County Public Works Office (MCPWO), Shelby Township, Rochester Hills, and others), including utilities (DTE, ITC, Consumers, AT&T, Comcast, Sunoco, OCWRC, etc.) and stakeholders (Macomb Orchard Trail Commission, Clinton River Watershed Council, Clinton River Trail Alliance, Southeastern Michigan Council of Governments (SEMCOG). |
On-going |
NA |
|
2 |
Finalize scope of “opportunity projects” with Oakland and Macomb County Road Departments/Commissions and SEMCOG. |
On-going |
April 2018 |
|
3 |
Conduct aerial survey of the pipeline route and valve station locations |
On-going |
April 2018 |
|
4 |
Develop construction sequencing plan to drain, flush, disinfect, and place new and existing main back into service between Romeo and North Service Center. |
On-going |
July 2018 |
|
5 |
Prepare concept design and identify location for the Chesterfield Loop temporary booster pump station. |
On-going |
July 2018 |
|
6 |
Select the alignment of the relocated 96” pipeline and continue coordination with Yates Cider Mill and county road departments. |
On-going |
July 2018 |
|
7 |
Prepare service restoration plan, including flushing, testing, tie-in separation, schedule restrictions, and water disposal. |
On-going |
July 2018 |
|
8 |
Identify temporary and permanent easement requirements. |
On-going |
July 2018 |
|
9 |
Prepare preliminary drawings for the four (4) new isolation valve vaults that will improve redundancy for the customers served off the 96” water main south of Romeo. |
On-going |
July 2018 |
|
10 |
Verify East Pond Creek discharge facility and determine hydraulic capacity of the creek for MDEQ permitting purposes. |
On-going |
July 2018 |
|
11 |
Conduct geotechnical and environmental testing along the selected pipeline alignment. |
On-going |
October 2018 |
|
12 |
Locate utilities along the selected pipeline alignment using “pot-holing” techniques. |
On-going |
October 2018 |
|
13 |
Conduct detailed surveying and mapping along the pipeline alignment. |
On-going |
October 2018 |
|
14 |
Verify operation of critical blow-off valves and air release valves needed to drain the pipeline; determine water disposal requirements; determine use of abandoned 96” main. |
On-going |
December 2018 |
|
15 |
Verify Bruce Twp., Romeo, Washington Twp., and Shelby Twp. ability to back each other up through interconnections for extended time periods (i.e. several months during wintertime construction). |
On-going |
January 2019 |
Although this is a no-cost change order, it is noted that the tasks associated with this professional engineering services contract are budgeted and being managed as shown in Table 2. Two tasks from the originally executed contract will remain open, Task 1.1. Project Administration and Task 2.1. Agency Coordination. Remaining budgets for these two tasks will remain unchanged ($23,068.12 for Task 1.1 and $14,276.05 for Task 2.1). The remaining unspent budgets from the other tasks will be reallocated to a new task, Task 1.5: Pre-Design ($1,205,702.10). All other tasks will be closed out. The total remaining budget through February 28, 2018, is $1,243,046.27.
|
Table 2 Re-Allocated Budget by Task |
|
Task |
Description |
Original Contract Budget |
Total Spent |
Remaining Budget |
Re-Allocated Budget |
|
Task 1 |
Phase 1: Route Evaluation and Selection |
|
1.1 |
Project Administration |
$68,840.00 |
$45,771.88 |
$23,068.12 |
$23,068.12 |
|
1.2 |
Pipeline Route Evaluation |
$279,800.00 |
$656,874.89 |
($377,074.89) |
$ |
|
1.3 |
Tie-in Configuration Analysis |
$62,190.00 |
$15,313.01 |
$46,876.99 |
$ |
|
1.4 |
Design Submittal Review |
$102,735.00 |
$ |
$102,735.00 |
$ |
|
1.5 |
Pre-Design |
NA |
NA |
NA |
$1,205,702.10 |
|
Task 2 |
Phase 2: Agency Coordination |
|
2.1 |
Agency Coordination |
$52,650.00 |
$38,373.95 |
$14,276.05 |
$14,276.05 |
|
Task 3 |
Phase 3: Construction Administration |
|
3.1 |
Construction Administration |
$455,635.00 |
$ |
$455,635.00 |
$ |
|
3.2 |
Condition Assessment of Existing Water Main Segment |
$540,730.00 |
$ |
$540,730.00 |
$ |
|
3.3 |
Valve Witness Testing |
$11,000.00 |
$ |
$11,000.00 |
$ |
|
3.4 |
Full-Time RPR |
$425,800.00 |
$ |
$425,800.00 |
$ |
|
|
Total |
$1,999,380.00 |
756,333.73 |
1,243,046.27 |
1,243,046.27 |
JUSTIFICATION
A portion of GLWA’s 96-inch water transmission main is located within the limits of the closed G&H Industrial Landfill site, a United States Environmental Protection Agency (USEPA) Superfund site of contamination. This current situation poses a risk to water quality to those served by the 96-inch water transmission main, which is the principle driver to relocate the 96-inch water transmission main out of the closed landfill.
The original scope and schedule was predicated on executing a live-tap on the 96-inch water main, which has been determined to be a method that exposes GLWA and its member partners to unacceptable risk. As a result, the new approach that has been developed and is being engineered by the professional engineering consultant (CH2M, now JACOBS) reduces the risk of water service disruptions to member partners and continues the push to deliver a solution to remove the portion of the 96-inch water transmission main from the closed G&H Industrial Landfill site.
FINANCIAL PLAN IMPACT
Proposed change order number one is an extension of time only and has no overall financial plan impact.
COMMITTEE REVIEW
This item was presented to the Operations and Resources Committee at its meeting on April 11, 2018. The Operations and Resources Committee unanimously recommended that the GLWA Board adopt the resolution as presented.
SHARED SERVICES IMPACT
This item does not impact the shared services agreement between GLWA and DWSD.