HomeMy WebLinkAboutCampbell Creek-Stormwater Plan 2005
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STRANO
ASSOCIATES, INc.-
ENGINEERS
910 West Wingra Drive
Madison, WI 53715
Phone: 608-251-4843
Fax: 608-251-8655
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May 26, 2005
City of Oshkosh
215 Church Avenue
PO Box 1130
Oshkosh, WI 54903-1130
Attention:
David C. Patek, P.E., Director of Public Works
Re:
Agreement for Planning Services
North Branch Campbell Creek Stormwater Management Plan
This is an Agreement for planning services (Services) related to a Storm water Management
Plan for the City of Oshkosh, hereinafter referred to as the PLAN, between the City of
Oshkosh, hereinafter referred to as OWNER, and Strand Associates, Inc., hereinafter
referred to as ENGINEER. This Agreement shall be in accordance with the following Scope
of Services, Compensation, Payment, Schedule, and other General Conditions contained
herein.
Background Information
This PLAN is being completed to assess alternatives to reduce flooding in the North Branch
Campbell Creek watershed. Of particular concern is the flooding that occurred on June 11,
2004, at the Landmark Plaza shopping center.
This PLAN will be prepared with the following goals in mind:
1.
Evaluate alternatives to reduce flooding in the North Branch Campbell Creek
Watershed.
2.
Evaluate specific alternatives to reduce flooding at the Landmark Pla:z;a shopping
center.
3.
Perform field survey of stormwater conveyance facilities surrounding the Landmark
Plaza shopping center as well as at other critical locations.
4.
Set up a hydraulic model of the storm water conveyance system that will allow for
assessment of existing and potential diversions to Sawyer Creek, inclusion of the
Armory and Wal-Mart detention basins (based on existing information), inclusion of
the proposed Campbell Creek Detention Basins Phase I and II at the
Menard's/Armory site, and inclusion of the Westhaven Golf Club detention (based
on existing information).
5a.
STRANO
ASSOCIATES, INc.'
ENGINEERS
City of Oshkosh
Page 2
May 26, 2005
Scope of Services
A.
Topographic Survey
ENGINEER will perform field investigation to obtain select storm drainage system elevation
data, pipe sizes/types, and ditch sizes/elevations at the locations shown on Figure 1. All
other storm sewer pipe elevation/size/pipe type information on the storm sewer to be
modeled will be obtained from the OWNER's GIS system.
1.
Along ditches to be modeled, cross sections will be taken every 200 feet in
an approximate 50-foot width centered on the ditch in areas with adjacent
floodplain and to the top of the bank in areas without adjacent floodplain (i.e.
along USH 41/Washburn Avenue). Invert elevations of the storm
sewers/culverts to be modeled that connect to these ditches will also be
surveyed.
2.
Along storm sewer to be modeled in the area immediately upstream and
downstream of the Landmark Plaza site as shown in Figure I and at the USH
41 storm sewer/culvert crossing, survey will include rim and invert
elevations of the storm sewer system as well as pipe sizes.
B.
Storm Sewer System Map
ENGINEER will develop mapping of existing storm water management features/facilities
within the Campbell Creek watershed for areas draining to the storm sewers to be modeled.
This mapping will be based on existing county and OWNER data supplemented by
information obtained in the field survey. ENGINEER will use available OWNER Phase II
WPDES Storm water Permit mapping to assist with this effort.
The following information will be shown on the mapping:
.
Watershed divides
Major waterways
Mapped floodplains
Wetlands (according to county data and existing mapping)
Existing lakes, ponds, and detention basins
Major drainage structures
Drainage problem areas
Land use
Soils
Storm sewer system existing mapping
Recommended improvements
.
.
.
.
.
.
.
.
.
.
C.
Analysis of Existing Drainage System
ENGINEER will develop computer models of the existing North Branch watershed as
shown in Figure 2. Portions of the South Branch and Main Branch will be modeled as shown
in Figure 2. ENGINEER will skeletonize the stormwater model in various areas to improve
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STRANO
ASSOCIATES, INc.'
ENGINEERS
City of Oshkosh
Page 3
May 26, 2005
the efficiency of the model. These models will estimate the peak discharge and volume of
storm water runoff draining to downstream areas. This information will be used to evaluate
the existing storm water drainage facilities to identify available capacities and identify
possible measures to address existing flooding problems.
D.
Analysis of potential impacts of future development on existing drainage system
ENGINEER will identify locations where improvements may be needed within the existing
drainage system in the North Branch watershed to accommodate future development. The
OWNER shall identify the type and location of future development. ENGINEER will
develop alternatives, opinions of probable costs, and recommendations for addressing
storm water flooding problems based on analysis guidelines developed at the kickoff
meeting. Four alternatives will be considered based on discussions at the May 3, 2005,
meeting between the OWNER and ENGINEER as follows.
1.
Alternative 1 - Analysis of the effect of additional detention on the North
Branch system. Preliminary discussions indicate that the detention to be
considered includes detention in the vacant parcel south of the Landmark
Plaza, additional detention at the golf course, detention in Wisconsin
Department of Transportation (WisDOT) right-of-ways if deemed feasible
by WisDOT through conversations with the OWNER, and provision for
providing a 100-year overflow route east of the Landmark Plaza to a
detention basin in the Tipler Junior High property. If these locations for
detention are determined to be infeasible during initial discussions with the
OWNER, an equivalent number (four) of comparable detention locations
elsewhere as preliminarily discussed will be analyzed.
2.
Alternative 2 - Analysis of the effect of adding storm sewer/conveyance
capacity to the North Branch system and downstream to the discharge at
Campbell Creek including possible revisions to the internal drainage system
within the Landmark Plaza site.
3.
Alternative 3 - Analysis of the effect of the existing and potential diversions
shown in Figure 2.
4.
Alternative 4 - Analysis of the effect of a storm water pump station at the
downstream end of the Campbell Creek storm sewer system. This will
include an analysis ofthe pumping rate and storage volume required to pump
the capacity of the existing storm sewer at the discharge point at the summer
target Lake Winnebago level.
5.
Alternate 5 - Analysis of the effect of a single mix of components assessed
above in Alternatives 1 through 4.
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STRANO
ASSOCIATES, INc.-
ENGINEERS
City of Oshkosh
Page 4
May 26, 2005
E.
Prepare Storm water Management Plan
ENGINEER will prepare a PLAN to be submitted to the OWNER in draft and final formats.
Three copies of the draft PLAN and ten copies of the final PLAN will be submitted to the
OWNER. This PLAN will include:
1.
A Storm Sewer System Map.
2.
A narrative discussion of study issues, criteria and goals, analytical methods,
and findings.
3.
Recommendations of measures to address existing and future stormwater
runoff based on an alternatives analysis, opinions of probable cost, and an
implementation PLAN.
F.
Meetings
ENGINEER will attend three meetings with OWNER as follows:
1.
2.
3.
Kickoff meeting with OWNER.
Meeting with OWNER to discuss the draft PLAN.
Meeting with OWNER to present the final PLAN to the City Councilor
Public Works Committee.
Data Provided by Others
ENGINEER is not responsible for the quality or accuracy of data nor for the methods used
in the acquisition or development of any such data where such data is provided by or
through OWNER to ENGINEER and where ENGINEER's Services are to be based upon
such data. Such data includes, but is not limited to, topographical information, soil borings,
groundwater data, chemical analyses, geotechnical testing, reports, calculations, maps, plans,
models, designs, drawings, specifications, record drawings, and OWNER's marked-up
drawings.
Obligations of OWNER
1.
Assist the ENGINEER by placing at his disposal all available information pertinent
to the Stormwater Plan including previous reports, construction drawings,
stormwater facility mapping, storm water plans, land use maps/ plans, zoning maps,
and any other data relative to the Stormwater Plan.
2.
Make all provisions for the ENGINEER to enter upon public and private lands as
required for the ENGINEER to perform the Services under this Agreement.
3.
Review all reports, sketches, estimates, drawings, and other documents presented by
the ENGINEER and render, in writing, decisions pertaining thereto within a
reasonable time so as not to delay the performance oftheENGINEER.
4.
Provide a listing/description of existing flooding problem areas.
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STRANO
ASSOCIATES. INc.'
ENGINEERS
City of Oshkosh
Page 5
May 26, 2005
5.
Provide benchmark and coordinate information for the survey to be performed in the
NAD 1983 State Plane Wisconsin South coordinate system.
6.
Provide existing hydraulic and hydrologic models from prevIOUS studies, as
available.
7. Provide water surface elevation data for Sawyer Creek and Landmark Plaza during
the June 11,2004, flood event, as available.
Compensation
The Services performed under this Agreement shall be provided for a lump sum fee of
$31,500 broken out as shown below. The lump sum fee assumes there will be no significant
delays, extensions, amendments, or changes in the Scope of Services. The cost for any
additional meetings in excess of what is defined above, or changes in the Scope of Services,
will be negotiated with the OWNER.
Topographical Survey
Meetings
Stormwater Modeling/Analysis
Stormwater Management Plan
$ 2,500
$ 4,000
$15,500
$ 9.500
$31,500
TOTAL
Hourly billing rates are adjusted annually on July 1 and are currently as follows:
Principal Engineer
Senior Project Manager
Project Managers
Project Engineers and Scientists
Engineering Technicians and Draftspersons
Secretaries
Hourly Billing Rates
$194 to $250
$112 to $146
$ 76to$117
$ 49 to $111
$ 40 to $81
$ 52.17
Expenses incurred such as subconsultants, travel, meals, printing, postage, copies, computer,
electronic communication, and long distance telephone calls shall be billed at actual cost
plus 5 percent.
Payment
The OWNER shall make monthly payments to the ENGINEER for Services performed in
the preceding month based upon monthly statements. Nonpayment 30 days after the date of
receipt of ENGINEER's invoice may, at ENGINEER's option, result in assessment of a 1
percent per month carrying charge on the unpaid balance.
Schedule
ENGINEER will complete the Services within four months after the date of authorization to
proceed from OWNER, which is estimated to be June 1, 2005. The draft PLAN will be
complete about three months after the date of authorization to proceed.
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sa.
STRANO
ASSOCIATES, INC,"
ENGINEERS
City of Oshkosh
Page 6
May 26, 2005
Termination
This Agreement may be terminated with cause in whole or in part in writing by either party
subject to a two-week notice and the right of the party being terminated to meet and discuss
the termination before the termination takes place. The ENGINEER shall be paid for all
completed or obligated services up to the date of termination.
Dispute Resolution
Except as may be otherwise provided in this Agreement, all claims, counterclaims, disputes,
and other matters in question between the OWNER and the ENGINEER arising out of or
relating to this Agreement or the breach thereof shall be decided by mediation.
IN WITNESS WHEREOF the parties hereto have made and executed this Agreement.
ENGINEER:
OWNER:
STRAND ASSOCIATES, INC.
CITY OF OSHKOSH
~~~eC.
Roger H. Huchthausen
Corporate Secretary
sjU/<1" ~ ~
Date Riéhard A. Wollangk
_u-Ci1..v Manager
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Date
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A<;Sí. City Comptroller
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Assistant City Attorney
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