Contract 2019-83 la TETRA TECH
October 28, 2019
Mr.James Maiworm
Assistant Director Environmental Services
City of Clermont
3335 Hancock Rd.
Clermont, FL 34711
Subject: Stormwater Master Plan Update
Project#: 200BPGen/Clermont
Dear Mr. Maiworm:
Tetra Tech is pleased to furnish this proposal for additional professional engineering services to assist
the City of Clermont with the above-referenced project. A detailed scope of services, compensation
summary,and project schedule are attached hereto.
Tetra Tech looks forward to providing these services to the City of Clermont. Should you have any
questions, please do not hesitate to contact me at 407-839-3955.
If this proposal meets your approval, please execute below and return a copy to my attention.
Very truly yours, Approval:
Tetra Tech City of Clermont
(J)In . Fox, P.E. By: �
Vice President
Date: I et r I
JDF/ab/Stormwater MP/Maiworm_092319
C: Kevin Burgess,City of Clermont
Duane Land,City of Clermont
Timothy Vanderwalker, PE,Tetra Tech
Tetra Tech, Inc.
201 E.Pine Street.Suite 1000.Orlando,FL 32801
Tel 407.839.3955 Fax 407.839.3790 www.tetratech.com
ATTACHMENT A
STORMWATER MASTER PLAN UPDATE
CITY OF CLERMONT,FLORIDA
SCOPE OF SERVICES
•
I. PROJECT DESCRIPTION
The City currently has a stormwater master plan (SWMP)that was last updated in 2013. Additionally,
Lake Minnehaha has been studied specifically with a study prepared in 2004. This proposed update
will include: 1. Hydrologic and hydraulic modeling for the drainage basins in the City surrounding
previously identified Basins 1, 11, 13, 15, 19,20,and 22;2.Water quality improvements of discharges
to Lake Minnehaha; 3. Development of Level of Service (LOS) criterion and assessment of existing
conditions within the study area; 4. Update and compile manuals and reports of stormwater
management infrastructure, operations and maintenance; 5. Update the Capital Improvement
Program for future projects and activities to list them based on the LOS criteria determined with the
City.
Professional services will be provided in accordance with the Continuing Consulting Agreement titled
Agreement Between City of Clermont and Tetra Tech, Inc. For Professional Engineering Services for
Public Works Protects dated December 9, 2014.
The lump sum fee for the services defined herein is $88,837. A breakdown of this fee is provided at
the end of this proposal.
The following is a detailed scope of the professional services Tetra Tech will provide to the City:
II. SCOPE OF SERVICES
Task 1. Data Gathering
1. It is assumed data has been gathered by the City as part of previously developed studies and
master plans. Tetra Tech will coalesce this data into a comprehensive summary to develop a
holistic assessment of how these activities are helping the City provide stormwater management
and achieve its goals for TMDL and water quality.
2. Tetra Tech will review the St.Johns River Water Management District(SJRWMD)online database
to obtain permitting information on activities that have been completed but may not be fully
documented in the City's records.
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3. Tetra Tech will work closely with the City's GIS and stormwater staff to obtain available data that
will facilitate preparation of the comprehensive project summary discussed above. This will
involve sharing data sets for the City's MS4s within the study area, if any.
4. Tetra Tech will visit the study area to confirm data provided by others and identify facilities that
have not been captured in the City's database. Obtaining survey or GIS data for these facilities
will be the responsibility of the City.
5. Tetra Tech will coordinate with the Lake County Stormwater Management staff to coordinate
stormwater management improvements that have been completed by the County that may
impact the City's stormwater management plan. Examples of this include improvements to
county roadways within the study area.
Task 2. Kick-Off Meeting
Upon issuance of a notice to proceed,Tetra Tech will schedule a kick-off meeting with the City's Public
Works Director,Deputy Public Works Director,City Engineer,and Stormwater Manager,among other
city staff to discuss Tetra Tech's existing lists of CIP projects, other available data, and review of the
proposed project schedule. Tetra Tech will prepare and distribute a summary from this meeting.
Task 3.AdICPR Modeling and Conceptual Engineering
It is our understanding that no hydrologic or hydraulic modeling has been performed for the study
area. Modeling will be completed as part of this update to the SWMP.
1. Tetra Tech will use AdICPR version 4 to complete the modeling.
2. Using available LiDar topographic data, Tetra Tech will conduct a table table-top delineation of
the drainage basins previously identified to confirm and refine the drainage basins in preparation
for the modeling process.
3. GIS, with the use of the Arc Hydro module, will be used to refine the hydrologic parameters
including curve numbers and time of concentrations for the refinement to the basins.
4. Stormwater Level of Service (LOS) — Tetra Tech in conjunction with staff will determine the
appropriate parameters for a LOS evaluation for the study area, including but not limited to,
reduction of flood risk, improvement of water quality,water reuse,regulatory and maintenance
status of the stormwater system. Previously developed LOS criteria will be used to inform this
process. The LOS criterion will be used to gage the performance of existing system and facilitate
management decisions related with operation and capital investment for future projects.
5. Tetra Tech will develop up to two(2) alternatives to address one problem area within the study
area identified as not meeting the City's LOS criteria.
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6. Conceptual designs will be provided on 11" x 17".
7. Tetra Tech will conduct up to two (2) progress meetings with the City during the course of
preparing the SWMP Update.
Task 4. LOS Analysis
1. The City is a stakeholder in the adopted Upper Ocklawaha Basin Management Action Plan
(BMAP). The latest amendment to this BMAP was adopted in July 2019 by the Florida
Department of Environmental Protection (FDEP), and it includes detailed allocations to the
responsible stakeholders in the basin.
Currently,the City meets its loading reduction targets. Tetra Tech will conduct a holistic analysis
of the City stormwater to identify stormwater retrofit projects that will provide water quality
enhancements to untreated outfalls from the City's system within the study area.
2. LOS Analysis—once the existing condition modeling has been completed,Tetra Tech will evaluate
the stormwater infrastructure based on the defined LOS in Section 4 of Task 3 above and develop
a priority matrix for a short-term LOS and long-term CIP.
When evaluating LOS project options, Tetra Tech will determine where there are opportunities
for flood control and/or water quality improvements.
Task 5.Lake Minnehaha Stormwater Improvement Study Update
Tetra Tech will analyze the data and results from tasks 1 through 4 above and summarize them in the
study update. The intent of this document is to summarize the City's stormwater management
activities report, studies, O&M manuals, and permits to coalesce, in a single document, all that the
City must manage in the study area. The study update will consist of the following:
1. The study update will consist of an executive summary, table of contents, an introduction,
methodology, H&H modeling, alternatives analysis and recommendations, water quality
assessment.
2. 11"x 17"figures illustrating the alternative solutions analyzed in previous tasks above. These will
represent approximately 10% complete preliminary engineering to illustrate the various
alternatives.
3. Preliminary Engineer's opinions of probable construction costs will be prepared for each
alternative solution.
4. A LOS benefit versus cost analysis will be prepared for each alternative.
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5. Tetra Tech will provide recommendations to the City regarding the alternative solutions and
benefit to cost.
6. Compilation of the City's status for its completion of CIP projects identified in the last SWMP
Update in 2008. Maps and tables will be provided to reflect the progress that has been made and
the magnitude of the CIP projects remaining.
7. Creation of an updated CIP for the City's stormwater management program.This updated CIP will
be critical part of the City's efforts to update its stormwater utility rate.
Task 6.Reimbursable Expenses and ODCs
1. Meetings(assumed 2 will be held at Clermont Environmental Services).
2. Tetra Tech will provide the City two(2)hard copies of the draft report; Four(4)copies of the final
report; a PDF copy sent via One Drive or Tetra Tech's RMFT file transfer site.
III. ASSUMPTIONS
1. Field data collection will be obtained by City staff. Site visits will be performed by Tetra Tech to
verify existing data and field conditions; findings will be noted and any "hard data" will be
requested of the City.
2. Tetra Tech will coordinate with the City's GIS and stormwater staff to establish protocols on
how all data will be received by the City for use in the City's data base. All work on the City's
GIS database will be conducted by City staff.
IV. ANTICIPATED SCHEDULE
Activity Days From
Notice to Proceed
Notice to Proceed 0
Data Gathering 21
Kick-Off Meeting 30
AdICPR Modeling and Project Analysis 90
LOS Analysis 150
Study Update 210
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I
V. COMPENSATION SUMMARY
The total lump sum compensation for the Scope of Services described in Sections II above is$88,837.
Tasks Total Cost
Data Gathering $ 6,159
Kick-Off Meeting $ 1,827
AdICPR Modeling $ 33,700
LOS Analysis $ 10,313
SWMP Update $ 35,023
Reimbursable Expenses&ODCs $ 1,815
Total $ 88,837
aTETRA TECH
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