Exh 8BAGENDA ITEM 8B
MARCH 25, 2002
CITY OF ATLANTIC BEACH
CITY COMMISSION MEETING
STAFF REPORT
AGENDA ITEM: Engineering Contract - Stormwater Master Plan Update
SUBMITTED BY: Robert S. Kosoy, P.E.
Director of Public Works
DATE: March 18, 2002
BACKGROUND: The Commission's Strategic Plan identified mapping and master
planning as high priority concerns. The Sewer and Water Master
Plans aze now complete, and a Stormwater Master Plan Update
was included in the current fiscal yeaz's budget.
The Stormwater Master Plan Update will include:
1) an update of the 1995 Stormwater Master Plan with a
companion document
2) update and conversion of AutoCAD drainage maps and
Primary Stormwater Management System maps to a
Geographic Information System (GIS)
3) .evaluation of the system deficiencies and problems, including
modeling for Hopkins Creek
4) formulation of a 10-year Capital Improvement Plan (CIP) for
the City's stormwater projects identified as part of this project
A second Request for Proposals (RFPs) was advertised and staff
received proposals on February 13, 2002. On February 25, 2002,
the City Commission authorized staff to negotiate a contract with
Camp, Dresser & McKee, Inc. Staff has negotiated a proposed
contract with Camp, Dresser & McKee to complete the update,
GIS. and 10-yeaz CIP effort, in the amount of $95,385.
RECOMMENDATION: Awazd the contract for prepazation of the Stormwater Master Plan
Update to Camp, Dresser & McKee in the amount of $95,385.
Authorize the City Clerk to send notification of the awazd to the
firm, and authorize City Manager to sign the contract with Camp,
Dresser & McKee.
ATTACHMENTS: Cover letter and Scope of Services from Camp, Dresser & McKee.
BUDGET: Funds in the amount of $75,000 for the Stormwater Master Plan
Update were budgeted in account 470-0000-538-6300. Additional
funding to complete the modeling effort is available in the same
account, since the Selva Marina Streets Project bid price for
stormwater work was well un budget in this account.
REVIEWED BY CITY MANA
MAR-15-02 14:14 FROM-CbM Jacksonville
8658 Baypine Rbad,Suhe 200
JadBbmllle, Flbrlda 32256
tei: 904731-7109
fax: 904 731.0465
March 15, 2002
Mr. Robert S. Kosoy, P.E.
Public Works Duector
City of Atlantic Beach
1200 Sandpiper Lane
Atlantic Beach, FL 32233-4318
904-791-0465 T^81 .AGENDA ITEM 8B
MARCH 25, 2002
Subject: City of Atlantic Beach
Scope of Services and Sudget -Revised
Stormwater Management Master Plan Update
Dear Mr. Kosoy:
CDM is pleased to submit this revised scope of services for the City of Atlantic Beach Master
Stormwater Management Plan Update (SWMPU) for your review and comments. This scope
was developed based on our most recent conversations and has been modified to address
your questions and comments.
We trust that the enclosed proposal meets your expectations for a comprehensive scope of
services thatwill contzx'bute to the successful development of an iznplementable SWMPL7.
We are looking forwazd to working with you on flus project . Tf you have any questions or
comments regarding Phis scope of services, please callus at (904) 731-7109.
Tbonald 1~. Maurer; P.E., DEE
Associate
Camp Dresser & McKee Tne.
Enclosures
ronmhine.enbinceflno •conStN<tibn •Opetat(o115
AGENDA ITEM 8B
MARCH 25, 2002
City of Atlantic Beach
Stormwater Master Plan Update
Scope of Services.
March 14, 2002
BACKGROUND
In 1995, the City of Atlantic Beach (City) developed a stormwater master plan (SWMP) that
evaluated the level of service provided within its six primary surface water systems, namely:
Selva Marina Canal, Hopkins Creek, Sherman Creek, Intracoastal Waterway, Puckett Creek,
and the Atlantic Ocean. The SWMP also provided recommendations for improvements in areas
where the stormwater system did not meet the established level of service (flooding occurs).
Since the publication of the SWMP, the Selva Marina system has been re-evaluated and
improvements are being implemented in the. core City improvements project (south of 12~
Street). Furthermore, other improvements are being implemented throughout the City in an
effort to provide for the stated level of service.
Before continuing with other improvements, the City would like to evaluate the systems that
have not been improved, and rank the improvements that are needed. Therefore, the City has
selected CDM to update the master stormwater plan. Hopkins Creek has been identified as one
of the systems that would specifically be further modeled. In addition, the City needs its
stormwater system maps to be converted from a CAD to a GIS based system.
CDM will provide the following services to assist the City of Atlantic Beach (City) in updating
their Stormwater Master Plan (Figure 1).
• Update the 1995 Stormwater Master Plan with a companion document (SWMPU;
Volume 2);
• Update and convert Auto Cad drainage maps and Primary Stormwater Management
System (PSWMS) maps to a Geographic Information System (GIS);
• Evaluate system deficiencies and problems, including modeling for Hopkins Creek; and
• Formulate a 10.yeaz Capital Improvement Plan (CIP) for the Cit}~s stormwater projects
identified as part of this project. A more detailed description of the various components
of this project is provided below.
The project scope consists of performing the preliminary engineering evaluation and providing
recommendations for improved LOS. At the option of the City, a supplemental agreement may
be negotiated to address the issues of providing permitting, funding and negotiation assistance,
and construction plans and specifications development services. The specific tasks to perform
the work are as follows:
AGENDA ITEM 8B
MARCH 25, 2002
Task 1 -Review Existing Report and Available Data and Idenizfy Problem Areas
CDM will review the 1995 SWMP and problem azea location maps provided by the City (road
closures from historic storms). CDM will meet with City staff to identify area location maps
provided by the City where recommendations made in existing reports were implemented
(either completely or partially). CDM will further obtain the following information from City
staff:
• Staff estimate of the level of service provided for City-identified problem areas,
• CAD drawing of stonnwater basin boundaries,
• CAD drawing of Citywide stormwater system (both open and closed),
• Extent of information (data) on the stormwater system shown on the CD drawing,
• Royal Palms stormwater letter report (Jones Edmunds' Report),
• Location of stormwater outfalls to waters of the state,
• NPDES permit and requirements, and
• Survey data collected during the development of 1995 master plan.
Based on the information furnished by the City, CDM will update the SWMP by generating a
section in the SWMPU (Volume 2) companion document that discusses areas where additional
data, further evaluation, and/or capital improvement project implementation maybe required.
Task 2 -Review of 1995 Drainage Maps and Convert from CAD to GIS Based
CDM will work with City of Atlantic Beach staff available topographical maps, engineering
plans, and other previous stormwater studies as identified in Task 1 to update the extent of the
watershed boundaries identified in the 1995 SWMP. CDM will then incorporate the digital
information (ACAD graphics) available from the City of the drainage map and the available
PSWMS. The GIS will be generated using State Plane NAD 83 coordinate system. If available,
CDM will incorporate data available for the PSWMS in a database format. CDM's work on the
stormwater facilities GIS will be compatible with the GIS format established for the water
master plan and the water distribution system GIS. The following specific tasks will be
performed:
• Convert watershed boundary map from CAD to GIS based (Figure l,)
• Convert digitally available PSWMS map from CAD to GIS based (essentially content of
Abstorm.dwg file provided to CDM)
• Using the templates provided to the City, populate the GIS data with digitally available
data (Appendix A). This is generally XYZ coordinate and conduit size data.
• Produce a 24" x 36" color graphic (5 copies) that shows the information and create a CD
for City use.
Task 3 - Stormwater Modeling for Hopkins Creek
Based on the evaluation of the existing Master Plan and discussion with City staff, the most
severe stormwater problem is in Hopkins Creek. Therefore, the modeling effort will focus on
modifying the existing SWMM model that CDM has developed for the Hopkins Creek system
as part of the City of Jacksonville Master Stormwater Management Plan. CDM has extended the
model well into the Aquatic Gardens area and this model has already been calibrated. Specific
subtasks necessary for the completion of this element are further described here.
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AGENDAITEM 8B
MARCH 25, 2002
Task 3.1 -Field Reconnaissance
Hopkins Creek
CDM will meet with Cites staff to establish the location, type and invert elevation of primary
stormwater structures (e.g., major culverts, bridges, weirs, lake controls, etc.) that are not
currently incorporated in the Hopkins Creek model. Existing information will be utilized to the
maximum extent possible, but if additional survey data are needed, CDM will define additional
survey information in a memorandum for the City to provide. City will be responsible for
furnishing CDM with additional survey information.
Ci Wide
CDM will visit the study area for observation of project infrastructure to define survey needs
and existing maintenance conditions of the PSWMS infrastructure. This will include three days
of field reconnaissance. Evaluation of the maintenance condition will include observations of
maintenance concerns such as condition of culvert, vegetative accumulation, sediments, and
erosion. CDM will use these observations in the refinement of the stormwater model for this
study.
CDM will consider the following for potential survey to be provided by the City:
Ditches
PSWMS ditches in the watersheds have already been modeled; however, secondary ditches that
are important will be determined by CDM and the City and will be included in the survey
request.
Wetlands/Ponds
Wetlands/Ponds provide storage for the runoff from the basin and the quantity of storage
provided will have to be identified.
Culverts
Culvert crossings along the I'SWMS and roadway profiles above the main crossing will have to
be considered for survey in order to identify flow overtopping the road.
Flooding Areas
Finish floor elevation for houses along City-identified flooding areas will be identified for
survey. In addition, in areas where the model identifies flooding potential, finish floor
elevations may also be identified for survey.
Task 3.2 -Refine Existing Hopkins Creek Stormwater Model (Existing SWMM Model) and
Simulate for Mean Annual, 5-, 10-, 25-, and 100-year24-hour Storm Events
CDM will refine (as necessary) the existing Hopkins Creek hydrologic and hydraulic model
(Figure 2). CDM will verify that the current model discretization of the sub-catchment areas and
of the PSWMS will allow for the determination of the extent of the problem identified by the
City of Atlantic Beach Staff and update the model accordingly. CDM will evaluate the existing
model as it relates to the problem areas identified in Task 1 and decide with the City whether
further discretization of the model is warranted. If the model is to be extended, CDM will add
up to 4sub-catchments and up to 2 additional nodes and conduits to the existing model.
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AGENDA ITEM 8B
MARCH 25, 2002
The hydraulic performance of the existing system will be evaluated by CDM under existing
.(since this tributary is considered built out, an evaluation of future land use condition is not
warranted) land use conditions using the Mean Annual, 5-,10-, 25-, and 100-year return periods
for the 24-hour distribution. Design storm simulation results will be tabulated by CDM and
compared to known structure elevations and street centerline elevation to determine the level of
service provided by the stormwater management system. Comparing existing flooding
deficiencies with known flooding problem locations will validate the model. If available,
additional anecdotal and recorded high water marks for an available storm event will be used
to verify the models.
Peak flood stages will be presented in a tabular format for the five storms evaluated. The
existing conditions will be compazed to the results developed for each of the alternative
conditions.
Task 3.3 Alternative Evaluations
CDM will evaluate two alternatives to the existing hydraulic condition for Hopkins Creek and
the City-identified problem areas (deficiencies). Each of the solutions will include a series of
conveyance and/or storage upgrade that would improve the existing levels of service currently
provided by the system. The alternative will build on each other and will provide the City a
solution that can be implemented in phases (e.g., acquire land, construct storage, add pipe
capacity). Tables will be generated to compaze the level of improvements provided by
implementing each of the alternatives for the five storms.
Task 4 -Develop Conceptual Capital Improvement Plan (CIP)
CDM will suggest PSWMS improvements to enhance and increase future evels of service as
well as potential improvements to water quality consistent with the Cit}/s NPDES permit with
cost estimates based on future system requirements.
For the Hopkins Creek system, CDM will develop a conceptual improvement plan to achieve
various levels of street and building flooding protection throughout the system using the City's
Level of Service goals. This improvement plan will include a mixture of conveyance and storage
improvements that are sized to provide the appropriate levels of service under future (built out)
land use conditions. A priority rating will be provided for each improvement with the level of
improvement provided at each step of implementation.
The project costs for the conceptual improvement plan will be estimated by CDM, including the
costs of constrnction, land acquisition, legal, engineering, and appropriate contingencies.
For the other systems, based on CDM knowledge of the azea, we anticipate that the type of Best
Management Practices (BMPs) that can be implemented in each of the problem areas will be as
follows:
• In the Puckett Creek watershed, additional storage will likely have to be provided to
improve the existing level of service (downstream systems have limited capacity and
soils have limited infiltration potential).
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AGENDA ITEM 8B
MARCH 25, 2002
In the other watersheds (e.g., Intracoastal Waterway and Sherman Creek), other facilities
such as exfiltration trenches, swales and baffle boxes will be considered to augment
treatment and storage in these areas.
CDM will present the City with a list. of recommended capital improvement projects by
problem area location with conceptual planning level estimates of project costs. Furthermore,.
the recommended projects will be prioritized in order of importance based on discussions with
the City. The capital improvement program will span a 10-year horizon for project
implementation.
Task 5 -Report Preparation and Presentation
CDM will prepare and deliver five draft and five final copies of a report that describes the
efforts in the above tasks. The report will contain the following sections:
• Table of Contents
• Introduction and Background
• Data Evaluation and Problem Areas
• Stormwater GIS
• Hopkins Creek Analyses
• Recommended 10-year CIP
CDM will provide one set of the SWMPU, volume 2 on disk, with maps and drawings as
Arview shapefiles with the coordinate system in state plane NAD 83, and text and tables in
Microsoft Word format. GIS mapping shall coordinate with existing GIS water and sewer base
maps.
Task 6 -Meetings and Presents#ons
CDM will participate in up to five regular progress meetings with the City during the course of
completing the assignment. CDM will also meet once with the SJRMWD to present the
recommended alternative and discuss potential permitting requirements. CDM will assist in
two presentations of this plan to the City Administration and elected officials.
BUDGET
Total compensation to be paid by the City to CDM for the services, materials, supplies and
other items or requirements necessary to complete the services as descnbed herein, shall be a
lump sum amount as shown on Table 1 payable via partial payments. CDM will submit no
more than one invoice statement to the City each calendar month covering services rendered
during the invoiced time frame. Each invoice will be due and payable in accordance with the
provisions of the Florida Prompt Payment Act.
SCHEDULE
The schedule to complete Tasks 1 through 6 will be completed within six months of the receipt
of the Notice to Proceed (NTl?). CDM will submit a draft report, including a CIP estimate,
within three months of the NTP.
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Table 1
City of Atlantic Beach
Stormwater Management Master Plan Update
Budget Estimate
March 14, 2002
CDM
Task Desrrintinn
Senior
Technical Project Design CAD
PrincinaI Advisor Manager Engineer Desiener Operator
't'otal
Total Loaded
Hour Per Dollar Per
Clerical Task Task
1.0 Review Existin Re ort and Available Data and Identif Problem Areas 2 4 10 60 18 18 10 122 $ 9,966
2.0 Review 1995 Draina a Ma sand Convert Data from CAD to GIS Based 2 4 12 24 18 100 20 180 $ 12,166
3.0 Stormwater Modelhr for Ho kips Creek
3.1 Field Reconaissance 0 2 12 24 8 0 2 48 $ 4,373
3.2 Refine Existin Model and Produce Existin H draulic Profile 4 8 20 80 40 32 10 .194 $ 16,033
3.3 Alternatlve Evaluation 2 4 ]2 80 40 24 4 166 $ 13,497
4.0 Conce foal Ca ital Im rovement Plan 2 8 24 60 30 10 4 138 $ 12,249
5.0 Re orCand Presentation 4 10 40 60 30 24 8 176 $ 15,598
6.0 Meetin s 2 4 24 32 10 8 8 88 $ 7,854
Total Labor Cost: $ 91,735
Total Hours IS 44 154 420 194 216 66
Hourl Raw Rate rom AB RFP Februar 2002 $52 $60 $40 $32 $24 $21 $15
Other Duect Costs Number Cost Total
CADComuter GIS 80 $20.00 $1,60D
Miaocom uter 150 $12.00 $1,800
Ex ress Service 10 $10.00 $100
Co ies 1,000 $0.15 $150
Total $3,650
Total Labor Cost $ 91,735
Other Direct Costs .$3,650
Total Bud et $95,385
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