HomeMy WebLinkAboutCOW 2012-06-11 Item 4D - Contract Supplement #2 - Water and Sewer Comprehensive Plans with Carollo Engineers for $21,721.50CouNuLAGENDA SYNOPSIS
Initials ITEM NO.
Meeting Date Prepared by Mayor_'s repi f I ;omW'l review
06/11112 BG f{' 4.D.
06/18/12 BG
ITEM INFORMATION
STAFF SPONSOR: BOB GIBERSON I ORIGINAL AGENDA DATE: 06/11/12
AGENDA I rLM TITLE Water and Sewer Comprehensive Plans
Consultant Supplemental Agreement No. 2 with Carollo Engineers
CATEGORY Discussion Motion Resolution Ordinance Bid Award Public Hearing ❑Other
Mt g Date 06111/12 Mtg Date 06/18/12 Mtg Date Mtg Date Mtg Date Mtg Date Mtg Date
(SPONSOR Council Mayor HR DCD Finance .Fire IT P&R Police PW
SPONSOR'S Carollo Engineers were hired as the consultant for the Water and Sewer Comprehensive
SUMMARY Plans in 2010. Due to additional requirements on the Water Comprehensive Plan,
Supplement No. 2 with Carollo is required to add to the scope of work. Additional water
funds will come from the Interurban Water Reuse Project with $25,000.00 budgeted.
Council is being asked to approve Supplement No. 2 with Carollo Engineers in the amount
of $21,721.50.
REVIEWED BY COW Mtg. CA &P Cmte F &S Cmte Transportation Cmte
Utilities Cmte Arts Comm. Parks Comm. Planning Comm.
DATE: 05/30/12 COMMITTEE CHAIR: DENNIS ROBERTSON
RECOMMENDATIONS:
SPONsoR /ADMIN. Public Works Department
COMMI'I'ITE Unanimous Approval; Forward to Committee of the Whole
COST IMPACT FUND SOURCE
EXPENDITURE RE-'QUIRE-11) AMOUNT BUDGETED APPROPRIATION REQUIRED
$21,721.50 $328,000.00 $0.00
Fund Source: 401 WATER (PGS 86 &90, 2012 CIP)
Comments:
MTG. DATE J RECORD OF COUNCIL ACTION
06/11/12
06/18/12
MTG. DATE
06/11/12
06/18/12
ATTACHMENTS
Informational Memorandum dated 05/25/12
Carollo Engineers' Supplement No. 2 to Contract 10 -055
Minutes from the Utilities Committee meeting of 5/30/12
155
W1 1 11
City of Tukwila
Jim Haggerton, Mayor
INFORMATIONAL MEMORANDUM
TO: Mayor Haggerton
Utilities Committee
FROM: Bob Glberson, Public Works Director 10
BY: Mike Cusick, Senior Engineer
DATE: May 25, 2012
SUBJECT: Water and Sewer Comprehensive Plans
Project No. 91040101, Contract No. 10 -055
Supplement No. 2
ISSUE
Approve Supplement No. 2 to Contract No. 10 -055 with Carollo Engineers for the Water /Sewer Comprehensive Plan.
BACKGROUND
The Departments of Health and Ecology require the City of Tukwila to update the Water and Sewer Comprehensive Plans every
six years. In 2010, the City contracted with Carollo Engineers to update the Water and Sewer Comprehensive Plans.
DISCUSSION
Carollo Engineers completed the work draft of Chapter Two, "Demographic Analysis and Demand Projections," for the
Comprehensive Plan in October 2010 using current population data. In November 2010, DCD requested that the Public Works
department rerun the population study model with 4,800 new housing units and 15,500 net new jobs by the year 2031.
In the 2005 water model, most areas of the City had more than adequate fire flows in excess of 4,500 gpm. In May 2011, the
Tukwila Fire Marshal requested that the fire flows in the Commercial Business District (CBD) be increased from 6,000 gpm to
8,000 gpm. The increased fire flows resulted in most of the CBD not having adequate fire flows and would require costly upgrades
to existing water lines. In April 2012, the Fire Marshal revised the required fire flows in all areas of the CBD except north of
Strander Blvd to 6,000 gpm.
The Consultants scope of work was to prepare a sewer system map book for the Public Works field crews to carry in their vehicles.
The task went over budget due to City staff finding multiple discrepancies in the existing sewer pipe maps.
FINANCIAL IMPACT
Supplement No. 2 will increase the Consultant's scope of work for Task 300 Planning Considerations for $5,721.50, Task 700
Distribution System Analysis and Task 900 Capital Improvement Program for $10,000, and Task 060 Hydraulic Model and
Mapping for $6,000, for a total Supplement of $21,721.50. Funding for the additional work will come from the Interurban Water
Reuse Project, page 86, 2012 CIP,
EXPENDITURES
Fundinq Budget
Original contract
$291,000.00
Water Comp Plan
160,000.00
Supplement No. 1
12,662.00
Sewer Comp Plan
143,000.00
Supplement No. 2
21,721.50
Interurban Water Reuse
25.000.00
Total
$325,383.50
$328,000.00
RECOMMENDATION
Council is being asked to approve Supplemental Agreement No. 2 to Contract No. 10 -055 with Carollo Engineers in the amount of
$21,721.50 and consider this item at the June 11, 2012 Committee of the Whole meeting and subsequent June 18, 2012 Regular
Council meeting.
Attachment: Supplemental Agreement No. 2
W:\PW Eng \PROJECTS\A- WT Projects \Water Comprehensive Plan Water (91040101) \InfoMemo Water Comp Plan Sup #2 052512- sb.doc
157
158
SUPPLEMENTAL AGREEMENT NUMBER 2
To
CONSULTANT AGREEMENT NUMBER 10 -055 C\D)
THIS SUPPLEMENTAL AGREEMENT is entered into between the City of Tukwila,
Washington, herein-after referred to as "the City and Carollo Engineers Washington, P.C.,
hereinafter referred to as "the Consultant in consideration of the mutual benefits, terms, and
conditions hereinafter specified.
The City desires to supplement the agreement entered into with the Consultant and executed on,
May 19, 2010, and identified as Agreement No. 10 -055. All provisions in the basic agreement
remain in effect except as expressly modified by this supplement.
The changes to the agreement are described as follows:
1. Scope of Services, for Supplemental Agreement #2 to the Comprehensive Sewer and
Water Plans (Plans) for the City of Tukwila. The purpose of this supplement is to add:
a. $5,721.50 for Task 300 Planning Considerations Section 304 Population. The
Consultant to rerun population growth model using revised data from the PSRC for
the year 2010.
b. $10,000.00 for Task 700 Distribution System Analysis and Task 900 Capital
.Improvement Plan. The Consultant to reanalyze the water system in the CBD south of
Strander Boulevard for a reduced fire flow of 6,000 gpm and required Capital
Improvement Program.
c. $6,000.00 for Task 060 Hydraulic Modeling and Mapping of the Sanitary Sewer
System. The Consultant is to reconcile the existing pipe data with current piping
inventory.
2. Deliverables
a. Revised Chapter 2 of the Comprehensive Plan with increased population numbers
based on November 2010 PSRC data.
b. Revised Chapter ,6 of the Comprehensive Plan "Distribution System Analysis" for
the CBD south of Strander Boulevard.
c. Revised Chapter 8 of the Comprehensive Plan "Capital Improvement Plan" for the
CBD south of Strander Boulevard.
d. Revise sanitary sewer map books.
3. Time for Performance, is amended to change the number of calendar days for
completion of the work to read an additional 90 days for a total of 980 days.
(W PW [ng/Olher/ Projects /A- WT /10 -WT01 /Supplemental Agreement 2 earollo 051512.doc)
159
4. Payment, shall be amended as follows:
Payment for the work provided by the Consultant as part of this supplement shall be
made for an additional $21,721.50. The total amount for the Consultant for this contact
shall not exceed $325,383.50 without express written modification of the Agreement
signed by the City.
DATED this day of
CITY OF TUKWILA
Jim Haggerton, Mayor
(W.PW Eng/ Other /ProjectslA- WT /10 -WTO1 /Supplemental Agreement 2 carollo 051512 do,)
7 2012.
CAROLLO ENGINEERS WASHINGTON, P.C.
-4-Irm- V'D-WW"^"jr'
Lara Kammereck, Associate Vice President
160
UTILITIES COMMITTEE
Meeting Minutes
Citv of Tukwila
Utilities Committee
May 30, 2012 5: 00 p.m. —Conference Room I *Wednesday Due to Holiday
PRESENT
Councilmembers: Dennis Robertson, Chair; Joe Duffie and Kate Kruller
Staff: Bob Giberson, Frank Iriarte, Robin Tischmak, Mike Cusick, Mike Ronda, and Gail Labanara
CALL TO ORDER: The meeting was called to order at 5:04 p.m.
L PRESENTATIONS
No presentations.
II. BUSINESS AGENDA
A. Proiect Completion and Acceptance: Interurban Avenue South Gravitv Sewer
Staff is seeking Council approval for project completion, closeout and release of retainage to R. L. Alia
Construction of Renton in the amount of $664,401.62 for the construction of the Interurban Avenue South
Gravity Sewer Project. This project replaced a failing sewer lift station with a gravity feed sewer line.
Ten (10) change orders in the amount of $28,580.38 were issued during this project, but were offset by
under runs. The project was completed under budget by approximately $17,000 without using the
contingency. Photos from the project were presented to the Committee in order to understand the need for
the changes orders. UNANIMOUS APPROVAL. FORWARD TO JUNE 4 CONSENT AGENDA.
B. Water and Sewer Comprehensive Plans: Consultant Supplement No. 2 with Carolla Engineers
Staff is seeking Council approval for Supplement No. 2 with Carollo Engineers in the amount of $21,721.50
for updates relative to the 2010 Water and Sewer Comprehensive Plans, specifically Tasks 300, 700, 900
and 060 of the Water Comprehensive Plan.
The consultant's scope of work needs to be increased due to multiple discrepancies in existing sewer pipe
maps; over estimation of the multi family population results in the Commercial Business District, and
changes to the fire flow requirements. Also part of the Water Comprehensive Plan is that the Department of
Health has notified us of their concern with the size of our water storage capacity. UNANIMOUS
APPROVAL. FORWARD TO JUNE 11 COW FOR DISCUSSION.
C. Educational ODDortunity: CIP 102
Per the request of Committee Chair Robertson (see Utilities Committee minutes dated 02/28/12), staff
utilized extra time at the Committee meeting to review the Capital Improvement Program (CIP) and
accompanying Attachments D, E and F, including the rate matrix. Committee Members will find this
information useful when utility rate increases are brought to Committee later this year. INFORMATION
ONLY.
III. MISCELLANEOUS Meeting adjourned at 6:20 p.m.
Next meeting: Next meeting: Tuesday, June 12, 2012 5:00 p.m. Conf. Room No. 1.
Committee Chair Approval
Minutes by Reviewed by KAM.
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