Backup Documents 06/22/2010 Item #16A1716 -A-171
MEMORANDUM
Date: June 29, 2010
To: Lyn Wood, Contract Specialist
Purchasing Department
From: Ann Jennejohn, Deputy Clerk
Minutes & Records Department
Re: Change Order #2 to Work Order #URS -FT- 3657 -07 -11
Contractor: URS Corporation Southern (URS)
Attached is a copy of the document referenced above, (Item #16A17)
approved by the Board of County Commissioners on June 22, 2010.
The original will be on file in the Minutes and Records Department as part of the
Board's Official Record.
If you should have any questions, please contact me at 252 -8406.
Thank you.
Attachment
ITEM NO.: C)\U J�
FILE NO.:
ROUTED TO:
16 A 17
DATE 46EIVED:
DO NOT WRITE ABOVE THIS LINE
REQUEST FOR LEGAL SERVICES
Date: June 22, 2010
To: Office of the County Attorney
Heidi Ashton
From: Lyn M. Wood, C.P.M., Contract Specialist
Purchasing Department, Extension 2667
Re: Change Order #2 to Work Order URS -FT -365
Contractor: URS Corp. Southern
RVA
i
� �� r
V D
t l VA-1S
BACKGROUND OF REQUEST:
This item went to the BCC on June 22, 2010; Agenda Item 16.A.17 a� `
This item has not been previously submitted.
ACTION REQUESTED:
Change Order review and approval.
OTHER COMMENTS:
Please forward to the BCC for signature after approval. If there are
any questions concerning the document, please contact me. Purchasing would
appreciate notification when the documents exit your office. Thank you.
C: Mac Hatcher, Growth Management
16 A 17
CONTRACTIWORK ORDER MODIFICATION
CHECKLIST FORM
PROJECT NAME: Watershed Mana ement Plans PROJECT #: PROJECT MANAGER: Mac Hatcher
% n R G 3 o
$URF43 #: M�D -#:
PO#: 4500102994 WORK ORDER #URS -FT- 3657 -07
DEPARTMENT, Engineering &Environmental Services CONTRACTOR/FIRM NAME: URS.
Original Contract Amount:
Current BCC Approved Amount:
Current Contract Amount:
Change Amount:
Revised ContractlWork Order Amount:
Cumulative Dollar Value of Changes to
this Contract/Work Order:
$ 198.840
(Starting Point)
$ 198,840
(Last Total Amount Approved by the BCC)
$ 198,840
(Including All Changes Prior To This Modification)
$ (40142.50)
$ 158,G97.50
(Including This Change Order)
$-�(40, 142.50)
Date of Last BCC Approval September 25 2007 Agenda Item # 10.E
Percentage of the change over /under current contract amount 20 %
Formula: (Revised Amount / Last BCC approved amount) -1
CURRENT COMPLETION DATE (S): ORIGINAL: March 29. 2008 CURRENT: August 15. 2010
Describe the change(s): Add Planned Phase 2 of project the Watershed Management
Specify the reasons for the change(s) X 1. Planned or Elective X 2. Unforeseen Conditions 1- 3. Quantity
Adjustments r 4. Correction of Errors (Plans, Specifications or Scope of Work) r 5. Value Added
r 6. Schedule Adjustments Note: One or more may be checked, depending on the nature of the change(s).
Identify all negative impacts to the project if this change order were not processed: Growth Management Plan
required studies would not be completed. j (,Owner This change was requested by: rlContractor /Consultant y r-1 Using Department X GMD
CDesign Professional rlRegulatory Agency (Specify) / rOther (Specify)
CONTRACT SPECIALIST PARTICIPATION IN NEGOTIATIONS: C Yes )(No
This form is to be signed and da ad.
i
APPROVED BY: �,IV `� P� �� (�'Xa — Date:
Project Manager \ /
APPRO) D BY: . X Date: X
REVIEWED BY: Date: - C�
Contract 'Sp cialist
Revised 2 -22 -08
16 A 17
CHANGE ORDER TO WORKORDER
TO: URS Corporation Southern FROM: Engineering and Environmental Services
7650 Corporate Center Drive, S 401
Miami, Fl 33126 -1220 2800 North Horseshoe Dr
Watershed Management Plans
September 12, 2007 URS -FT- 3657 -07- 11/4500102994
Change Order 2 May 26, 2010
Change Order Description:
This change order is to authorize tasks in Phase 2 of the project, reduce contract by $40,142, and
extend completion date by 533 days.
Original agreement amount ......... ............................... .......................$198,840
Sum of Previous Changes ...................... .............................$0
This Change Order No. 2 Amount ( subtract) ...... ............................... (4 0. 14 2 .50)
0 )
Revised Agreement Amount .............................. ............................... $15 8 6 9 7. 5 0
Original contract time in calendar days ................. ....................... `....180 days
Adjusted number of calendar days due to previous change orders ...............336 days
This change order adjusted time is ........................ ............................533 days
Revised Contract Time in working days ...................... ...........................1049 days
Original Notice to Proceed date ................... ............................... October 1, 2007
Completion date based on original contract time ........................ March 29, 2008
Revised completion date due to change order (s) ......................... August 15, 2010
Your acceptance of this change order shall constitute a modification to our Agreement and will
be performed subject to all the same terms and conditions as contained in said Agreement
indicated above, as fully as if the same were repeated in this acceptance. The adjustment, to this
Agreement shall constitute a full and final settlement of any and all claims arising out of or
related to, the change set forth herein, including claims for impact and delay costs.
Prepared by:,
Accepted by:
Approved by.
Mac Hatcher, Project Manager
Land Development Services
Date: / Lf -`' "'
Date: 5/28/10
Michael Nardone, Senior Vice President
URS orporation Southern
wi4 _ I,— Date:
Oliam D. Lorenz, Jr., P.E., Land Development Services
O S -Z9 -2.0/0
Approved by e ' a , ' Date: 0, od' 201(1
Nick Cas`alannuida4TWing and Regulation
Change Order No.
Page 2
Approved by: _
N
Approved by: s
Lyn W.
, Growth Management UIvrsion
Contract Specialist
ATTEST:
Dyuiglit �. Bibck� Clerk
16A 17
Date:
Date: /d
BOARD OF COUNTY COMMISSIONERS OF
COLLIER COUNTY FLORIDA
Y: W
Fred W. Coyle, Cha an
Print Name: c?M }�. PaQ'b
�asiS�t County Attorney
l
Item A '!SQL l
Agenda
Date
Date
Dale
ReC'd ��
16 A 17
Attachment A
Collier County Project Management Oversight Contract
URS Program Management Assistance
5/20/10
For PBSJ Contract Collier County Watershed Model Update and Plan Development
"Phase 1 Scope of Work Hydrodynamic Model Update, Topographic Data Development
and Data Management, and Water Quality/Ecological Assessment"
INTRODUCTION
This scope of work is to provide limited program management assistance to Collier County with respect
to the above PBSJ contract. Originally, URS was to provide program management for the development
of the Watershed Plans which was thought to require the assistance of four to five additional modeling
consultants. Early in 2008, it was determined that only one additional modeling consultant was
required. URS assisted with the development of an RFP to complete the Watershed Plans. PBSJ was
selected through the County procurement procedures in November of 2008. PBSJ was awarded Phase 1
of this project in April of 2009. Full program management services are not warranted or needed to
oversee this.one contractor / consultant. However, this scope will provide technical expertise to the
County as needed to critically review and assist PBSJ in developing the tools needed for the construction
of the watershed management plans. The intent is to supplement the County's modeling and ecological
expertise with respect to the Watershed Management Plan Development.
PBSJ developed a Phase 1 Scope to include the following elements. The table below presents those
elements and PBSJ fees. URS proposes to provide QA /QC reviews and County support on these tasks
which will include providing guidance, and a critical review of work products.
PBSJ
Element
PBSJ Element Description
PBSJ Fee
URS Percent
URS Fee
1
Initial Model Comparison and
Estimate of Flow to Estuaries
$28,346
21%
$6050
2
Topographic Data Development
$46,988
N/A
$0
3
Development and Calibration of CC
ECM Model
$357,713
12%
$43,390
Total
$49,440
Following are descriptions of the tasks included in each work element.
Element 1 — Initial Model Comparison and Estimate of Flow to Estuaries
URS will review the Technical memorandum developed by PBSJ for Task 4 and
provide the County a critical review of the work product in a summary
memorandum format.
Below are the specific tasks outlined in the PBSJ Scope.
Task 1 - Literature Review related to flows in Collier County.
16 A 17
In this task, the PBS &J /DHI team will prepare a summary of literature regarding historical and current
flow regimes in Collier County. This will include works by the SFWMD, the U.S. Fish and Wildlife Service,
FDEP, Collier County, and others.
Task 2 - Obtain Models for Existing Conditions (Year 2000), Natural System (pre -
development) Condition, and Future Condition.
In this task, the PBS&J /DHI team will obtain model setup files for MIKE SHE models previously
developed for the Big Cypress Basin.
Task 3 - Develop Comparison Plots.
In this task, the PBS &J /DHI team will use the generated results from the BCB PIR, BCB NSM, and
BCB FCM models for comparison purposes. This effort will focus on comparing predicted flows
to the estuaries and average wet and dry season water levels. For purposes of this preliminary
evaluation, comparisons will be made for the 13 year simulation period of the PIR and NSM MIKE SHE
models developed for the BCB. The following comparison plots will be generated:
• Flow to Estuaries. Individual time series of predicted flow will be generated for each of the
modeled channels that discharge to the estuaries for the 13 year simulation period. It is
recognized that the BCB NSM includes only a few flow ways.
• Water Levels. Average wet and dry season water level maps will be generated for each of the
models to evaluate hydrologic conditions.
• Groundwater Levels. Groundwater results can be evaluated in several ways, either as spatially
distributed maps, or as profile views, or as time series at specific locations. For this evaluation,
results will be generated as spatially distributed maps showing the average annual, average wet
season, and averaged dry season groundwater elevation in the surficial aquifer. Comparative
maps will be generated by subtracting the PIR results from the NSM results.
• Water Budgets. The PBS &1 /DHI team will develop water budgets for each basin and for the
entire county for the BCB PIR, BCB NSM, and BCB FCM models. The water budget will model
inflows such as rainfall and groundwater, and outflows such as evapotranspiration, runoff,
groundwater infiltration, groundwater withdrawals, and groundwater flux to estuary
boundaries.
Task 4 - Prepare Technical Memorandum.
The Technical Memorandum will include the following:
• Summary discussion of available literature related to flows and average wet season water level
assessments of Collier County
• Model descriptions and discussion of model
• Comparative results for discharge to the estuaries
• Comparative results for average wet season water level analysis
• Comparative results for groundwater analysis
• Water Budget results
• Summary of identified differences between the models related to depth of overland flow,
aquifer drawdown, and average seasonal water levels.
Element 2 — Topographic Data Development and Data Management
The County does not require URS support with review of these Tasks.
16 A 17
Task 1 - Digital Terrain Model (DTM)
Work will consist of processing area of new LiDAR for Collier County (approximately 1250 tiles) for
creation of Digital Terrain Model with breaklines based on SWFWMD standards and supported by
SFWMD. The deliverable will be the processed LiDAR and breaklines in DTM's.
Task 2 - DEM Generation
Work will consist of the following subtasks:
a. Creation of 5 -foor by 5 -foot horizontal grid raster DEMs from the DTMs generated in Task 1 for
Quality Control review and for definition of drainage and watershed boundaries. The elevation
within each grid cell will be the average of the LiDAR elevations within each cell. The vertical error is
expected to be ± 3 inches. The deliverable will be 5 -foot horizontal raster Digital Elevation Models
(DEM) derived from the terrain.
b. Creation of a regional raster DEM and two detailed area raster DEM's for MIKE SHE modeling
purposes.
Task 3 — Subbasin Delineation
Work will include re- delineation of subbasins for consistency with the DEM. The level of detail will
be the same as currently available from the County's subbasin map, but the new subbasin dividers
will follow the new DEM topography.
Task 4 - Data Management:
Work will consist of the following sub - tasks:
a) Collaboration with the County and the project team to establish a project geodatabase (ESRI
format) that is compatible with SFWMD geodata standards and supports all data required for
the modeling.
b) Loading, integration and management of GIS model data and time - series (observations and
modeled results).
c) Loading, integration and management of all other project spatial data and supporting tables,
including water quality. The deliverable will consist of databases in ESRI geodatabase format.
16 A 17
Element 3 - Development and Calibration of CC ECM Model
URS will critically review the model calibration procedures and results with
primary concern on the calibration adjustments to appropriate coefficients and
the surface groundwater interface. The existing Mike -She model was developed
from a flood simulation and control perspective. This watershed project focuses
more on overall water budget for the estuaries. Groundwater level is the key
components to the ecology of the watershed. URS will also review the Technical
memorandums developed by PBSJ for Tasks 1 through 12 and provide the
County a critical review of the work products in a summary memorandum
format.
Task 7 — Review current model applicability
In order to identify existing model shortcomings with respect to the current objectives, we will first
review the existing model. Models are built with different objectives in mind, different calibration
criteria, and different data. As such, a review of the basic framework of the existing model will aid us in
determining how much work we might anticipate occurring in future tasks; allowing us to maintain
schedule and budget. If there are significant issues with respect to the current objectives and the
existing model, we will immediately notify the County, as this may bring about changes in scope or
schedule.
Task 2 - Meteorological data
The existing MIKE SHE /MIKE 11 models of the Big Cypress Basin (BCB) use spatially distributed rainfall
and reference evapotranspiration (ET) data developed by the South Florida Water Management District
( SFWMD). These data have a resolution of 2 -miles and contain data through December 2000. For the
Collier County model (CCM), the PBS &J /DHI team proposes to replace the rainfall data used in the BCB
models by available 1.2 -mile resolution NEXRAD radar dataset from the SFWMD for the current decade.
This data is available for the period from January 2002 — October 2007.
Task 3 - ECM Land Use and Vegetation Data
The existing BCB models utilize land use data for the year 2000 acquired from SFWMD and classified per
Florida Land Use, Land Cover Classification System (FLUCCS). For this project, the PBS &J /DHI team will
obtain the most recent FLUCCS data (year 2004). The PBS &1 /DHI team will then review the most recent
aerial photography of the County to update the land use map for existing conditions.
Task 4 - ECM Agricultural Irrigation Updates
The irrigation component in the CCM MIKE SHE /MIKE 11 model will be modified to reflect changes in
water used for irrigation since 2000. Modifications will be made based on the new land use distribution
map and aerial photos.
Task 5 - ECM Ground Water Withdrawal Data
Development of an accurate ground -water withdrawal database for the CCM is essential for the success
and the efficiency of the ground -water calibration process. The most current and complete
ground -water withdrawal information available will be incorporated into the model. Ground -water
withdrawal rates for each of the permitted potable water supply utilities will be updated in the most
current withdrawal data.
Task 6 - ECM Topographic Data and Extend Catchment
The CCM will use updated topographic data developed from Light Detection and Ranging (LIDAR)
surveys provided by Collier County for the proposed extended model domain.
16 A 17
Task 7 - ECM Subsurface Model Update
The CCM will include an updated and expanded ground -water component. Grid files for the existing
three layers of the BCB model (water table aquifer, Lower Tamiami aquifer, Sandstone aquifer) will be
extended to encompass the proposed CCM model domain. Considerable effort will be made to address
the communication between the surface water network, the overland flow plain and the three layers of
the ground -water component.
Task 8 - ECM Definition of Boundary Conditions
Surface water boundaries will be modified as necessary to accurately represent surface water sources
and connections.
Task 9 - ECM Definition of Initial Conditions
Results from preliminary model runs will be used to establish the initial conditions. The initial condition
will represent an approximate condition of stage and ground -water heads with respect to observed
conditions for the starting date of the simulation. In order to reduce any errors associated with assumed
initial conditions, a warm up period of at least one full wet season will be added to the beginning of each
subsequent simulation.
Task 10 - ECM Hydraulic Model Updates
The PBS &J /DHI team will collaborate with SFWMD and the County to update the surface water network
to include pertinent features maintained by Collier County that is not currently included as a part of the
SFWMD system. The inclusion of County maintained canals and structures will be dependent on criteria
established with the County. Engineering drawings and survey data will be used to describe channel
cross - sections, structure geometries and operations where such data is available. The additions will be
prioritized to add problem areas first such as Gordon River, and Lely District 6. As with the SFWMD
structures, the model will be calibrated with operational controls that are primarily based on recorded
data; the final model will utilize operational rules established by Collier County water management
policy.
Task 11 - ECM Observation Data
To assess performance of the CCM, observation data sets within the CCM model domain will be
extended through 2007 using data collected from the LISGS, SFWMD, Lee County and Collier County.
This will include stage and flow monitoring time series data from within the canal network,
ground -water elevation time series data from observation wells, and historic structure operation time
series data. The data will processed into the MIKE SHE compatible format and added to a MS Access
database file.
Task 12 - Model Calibration
The calibration effort will be performed in two stages. During the first calibration stage, the PBS &J /DHI
team will work to calibrate the model on a county -wide basis. At the end of this effort, results will be
compared to the targets and they will be reviewed with the County. During the review process, areas of
the model that may need improvement will be identified. If the County determines that additional effort
is needed to improve calibration in specific areas of the model, these efforts will be completed during a
second calibration stage.
Task 13 — Development of Storm Event Simulations (not included)
16 A 17
The calibrated CCM model will be applied to evaluate 4 established storm events. These will include the
5 year, 24 -hour event; the 10 year, 24 -hour event; the 25 year, 72 -hour event; and the 100 year,
72 -hour event. Initial conditions for these assessments will be the SFWMD antecedent moisture
conditions. The results will be processed and reported to the County for evaluation and planning
purposes.
Task 14 - Levels of Service Analysis and Basin Discharge Rates (not included)
The results of the design storm event simulations will be used to evaluate the flood protection levels of
service (LOS) standards associated with road access and structural flooding. Currently available County
LOS criteria will be used if available. Otherwise, LOS criteria that consider types of roads and accessible
flooding depths will be developed in coordination with the County. The product of this analysis will be a
map and a table showing the modeled LOS conditions.
Task 15 - Task Reporting (not included)
16A 17
§ (\(
\k`
? \,
■
{
KE��|
.
.....
7�£E
;!
k!§
\
E
»
:lelNi
■
: ■
��,2¥-E|
§ (\(
\k`
? \,
■