HomeMy WebLinkAbout36. Amendment to Professional Service Agreement for TID 34 & TID 35 Brown & CaldwellCity
of�
Oshkosh
MEMORANDUM
TO: Honorable Mayor and Members of the Common Council
FROM: Steven M. Gohde, Assistant Director of Public Works S
DATE: July 19, 2018
RE: Amendment to Professional Services Agreement for TID #34 and TID #35 Storm Water
Support / Brown and Caldwell ($11,944)
A professional services agreement was executed on April 27, 2018 with Brown and Caldwell for TID #34 and
TID #35 storm water support services. Additional services were requested from Brown and Caldwell due to
information requested by the Wisconsin Department of Natural Resources at the Notice of Intent permit pre -
submittal meeting and the impacts of water quality basin design on the Oshkosh Corporation site.
The additional services include additional hydrologic and hydraulic modeling, Koeller Street/Westfield
Street Prairie Treatment System water quality modeling, TID #34 wet detention basin storm water modeling
report, and TID #35 storm water modeling report.
Staff has reviewed the amendment and the costs. The amount of this agreement amendment is not to exceed
$11,944. This will raise the total agreement amount to $35,189 (not to exceed). Funds for this project are
included in the Storm Water section of the 2018 Capital Improvement Program.
Chapter 12 of the Municipal Code of the City of Oshkosh provides that professional services of a specialized
nature, including engineering services, may be procured without the use of formal, sealed quotes. In
accordance with Section 12-16 of the Code, I am hereby submitting this report regarding this professional
services amendment.
Please contact me if you have any questions concerning this professional services amendment.
Approved,
Mark A. Rohloff
City Manager
SMG/tlt
1: \ Engineering \ 2018 CONTRACTS \ 18-14 Oshkosh Ave Area \ Project_Information \ Correspondence \ Memo \ 18-14 B&C TID #34 & TID k35 SW Support CA #1 Memo_7-19-18.docx
AMENDMENT NO. 1
The CITY OF OSHKOSH, hereinafter referred to as CITY, and BROWN AND CALDWELL, 8383 Greenway
Boulevard, Suite 600, Middleton, WI 53562, hereinafter referred to as the CONSULTANT, entered into an agreement for
TID #34 AND #35 STORM WATER SUPPORT on April 27, 2018.
Paragraph C in ARTICLE XII. PAYMENT included the provision that costs for additional services shall be
negotiated and set forth in a written amendment to this AGREEMENT executed by both parties prior to proceeding with
the work covered under the subject amendment.
THEREFORE, the CITY and the CONSULTANT agree to insert the following paragraph after the first paragraph
in ARTICLE III. SCOPE OF WORK:
The CONSULTANT shall provide the services described in the CONSULTANT's Exhibit A — Scope of Services and
Compensation dated July 6, 2018.
The CITY and the CONSULTANT further agree to insert the following bullet point after the first bullet point in
Paragraph A of ARTICLE XII. PAYMENT:
• Payment for Amendment No. 1 shall be a Time and Materials Sum not to exceed $11,944 (Eleven
Thousand Nine Hundred Forty Four Dollars).
All other terms contained within the April 27, 2018 agreement remain unchanged and in effect.
In the Presence of:
(Seal of Consultant
if a Corporation
CONSULTANT
By:
(Specify Title)
By:
(Specify Title)
CITY OF OSHKOSH
By:
(Witness) Mark A. Rohloff, City Manager
And:
(Witness) Pamela R. Ubrig, City Clerk
APPROVED: I hereby certify that the necessary provisions
have been made to pay the liability which
which will accrue under this Agreement.
City Attorney
City Comptroller
L\ Engineering\ 2018 CONTRACTS\18-14 Oshkosh Ave Area\Project_Information\Contract Info\Consultant- Page 1 of 1
Contractor Agreements\Brown & Caldwell\18-14 B&C CA M1-TID 934# SW Support_7-6-18.docx
Exhibit A — Scope of Services and Compensation
Amendment #1 to TID #34 & #35 Stormwater Support
Brown and Caldwell Project # 152187 _
City of Oshkosh Purchase Order # 180700 RECEIVED
July 6, 2018
JUL -6 2018
DEPT OF PUBLIC WORKS
OSHKOSH, WISCONSIN
Sco e: This Exhibit A documents additional tasks requested of Brown and Caldwell (BC) by the
City of Oshkosh (City) for services under the TID #34 & #35 Stormwater Support project (City
Authorization Dated May 3, 2018; BC Project # 152187) agreement dated April 27, 2018. All
terms and conditions from that agreement remain in effect for the work and budget described in
this Amendment #1.
Task #9: Additional Hydrologic & Hydraulic Modeling
BC will update the proposed conditions hydrologic and hydraulic model (XPSWMMTm) for the
TID #34 and #35 project area. Updates to the model will include:
• The TID #35 (Koeller Street / Westfield Street) final storm sewer design, as provided by
the City.
• The former golf course pond system equalization pipe design, as provided by the City.
• The TID #34 (Oshkosh Corporation Global Headquarters) wet detention basin design, as
provided by the City. This BMP was previously a prairie treatment system.
The model will be executed for the for 10-, 25-, and 100 -year, 30 -minute critical duration storm
events (with rainfall depths and distributions from the Midwest Climate Center Bulletin 71) and for
the 1-, 2-, 10-, and 100 -year, 24-hour storm event with rainfall depths and distributions consistent
with City of Oshkosh Municipal Code Chapter 14. The results of the analysis will be summarized
(using graphical and tabular formats) and provided to the City. Graphical maps (2D output from the
XPSWMMT" modeling) of the flooding extent in the study area will be prepared for the 10 -year and
100 -year, 24-hour storm events.
Tabular results will include peak water surface elevations at key locations in the model and pump
run-time information for all events analyzed. Tabular results will include the runoff volumes 1-, 10-,
and 100 -year, 24-hour storm events discharged from TID #34 and to the stormwater water quality
BMPs designed for Koeller St and Westfield St. The output file for all XPSWMM" model runs will
be provided in their standard text format. Copies of the input/output XPSWMMTM model runs will
be provided in XPSWMM" standard read only export format.
Task #10: Koeller Street / Westfield Street Prairie Treatment System Water Quality
Modeling
BC will develop a WinSLAMM model to estimate the average annual pollutant reduction for TSS and
TP for the proposed Koeller Street / Westfield Street Prairie Treatment Systems. To the extent
possible, the model will be consistent with the requirements of current WDNR guidance documents.
The City will provide design information including design plans and the design TSS reduction the
Prairie Treatment System will achieve. WinSLAMM modeling will be used to estimate the annual
runoff volume passing through the treatment system and the annual runoff volume that bypasses the
treatment system based upon the design information provided by the City.
TID 34_35 Amendment 1—final-2018-7-06—Q Page 1 of 3
Exhibit A — Scope of Services and Compensation
Amendment #1 to TID #34 & #35 Stormwater Support
Brown and Caldwell Project # 152187
City of Oshkosh Purchase Order # 180700
July 6, 2018
Task #11: TID #34 Wet Detention Basin Stormwater Modeling Report
A stormwater modeling report will be prepared to document the modeling of the TID #34 wet
detention basin. The report will document the water quality modeling and the hydrologic and
hydraulic modeling completed as part of this project. The report will be prepared such that the City
may use it as part of a Stormwater Notice of Intent (NOI) submittal for construction of the TID
#34 wet detention basin. Included in the report will be a brief narrative of the modeling, model
input/output, and supporting figures.
A draft report will be prepared and provided to the City for review. Following review, the report will
be finalized and a final report delivered to the City. The final report will be delivered as an Adobe
Acrobat Portable Document Format (pdf .
Task #12: TID #35 Stormwater Modeling Report
A stormwater modeling report will be prepared to summarize the modeling of the TID #35
stormwater system. The report will document the water quality modeling and the hydrologic and
hydraulic modeling completed as part of this project. The report will be prepared such that the City
may use it as part of a Stormwater Notice of Intent (NOI) submittal for construction of the Koeller
Street and Westfield Street extensions. Included in the report will be a brief narrative of the
modeling, model input/output, and supporting figures.
A draft report will be prepared and provided to the City for review. Following review, the report will
be finalized and a final report delivered to the City. The final report will be delivered as an Adobe
Acrobat Portable Document Format (pdf .
Schedule
BC anticipates initiating the effort included in this amendment by July 6`', 2018. BC will commence
work immediately after the City issues a written (email) Notice to Proceed. A draft TID #35
stormwater modeling report will be provided to the City by July 16, 2018, or ten (10) calendar days
after the City issues a written Notice to Proceed and provides all needed data to BC, whichever date
is later. A draft TID #34 wet detention basin stormwater modeling report will be provided to the
City by July 23, 2018, or seventeen calendar days after the City issues a written Notice to Proceed.
Interim information will be provided to the City as requested to meet the City''s project needs. Final
reports will be provided to the City three (3) days after review comments are received.
TID 34_35 Amendment 1_fmal_2018-7-06_v2 Page 2 of 3
Exhibit A — Scope of Services and Compensation
Amendment #1 to TID #34 & #35 Stormwater Support
Brown and Caldwell Project # 152187
City of Oshkosh Purchase Order # 180700
July 6, 2018
Budget
Task
Estimated
Estimated
Estimated
#
Task Description
Budget
TID #34
TID #35
Cost
Cost
9
Additional Hydrologic & Hydraulic Modeling
$3,288
67%
33%
Koeller Street / Westfield Street Prairie
10
Treatment System Water Quality Modeling
$2,148
0%
100%
TID #34 Wet Detention Basin Stormwater
11
Modeling Report
$3 254
100%
0%
12
TID #35 Stormwater Modeling Report
$3,254
0%
100%
Total
$11,944
Current contract Amount: $23,245
Amendment #1: $11,944
Amended Contract Amount: $35,189
Assumptions for Work Conducted Under Amendment #1:
1. The City will provide design drawings (PDFs) of all elements to be included in the modeling.
The files for all elements will be provided prior to start of the work. The following design
plans will be included:
a. Koeller Street / Westfield Street storm sewer.
b. Koeller Street / Westfield Street prairie treatment system.
c. Former golf course pond system equalization pipes.
d. TID #34 wet detention basin.
2. The scope of work assumes there are no changes to the drainage areas or drainage area
hydrologic conditions to each of the items identified under Assumption 1 a -d.
3. The scope of work includes one (1) iteration of hydrologic and hydraulic modeling.
Evaluations of alternative designs are not included as part of this scope of work.
4. The hydrologic and hydraulic analysis conducted does not include inlet capacity analyses, inlet
leads, privately -owned storm sewers, privately -owned structural management measures, or the
prairie treatment systems in Koeller Street / Westfield Street.
5. The scope of work does not include preparing permit applications. Stormwater reports will be
prepared to supplement the City -prepared applications.
6. No survey or other field work is budgeted.
7. Data required for stormwater analyses will be provided to BC at no cost to the project.
8. The scope and budget does not include any face-to-face meetings with the City or other
governmental agencies.
All work will be conducted in 2018.
TID 34_35 Amendment 1—final-2018-7-O6—v2 Page 3 of 3