HomeMy WebLinkAbout1997-04-22 - AGENDA REPORTS - PHASE III STORMWATER (2)AGENDA REPORT
City Manger Approval
Item to be presented by:
Lawrence P. Cushman
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DATE: April 22, 1997
SUBJECT: PHASE III OF THE STORMWATER MANAGEMENT PLAN INCLUDING
AUTOMATED MAPPING
DEPARTMENT: Building & Engineering Services
On June 18, 1990, the City of Santa Clarita became a co -permittee with the County of
Los Angeles on an NPDES Permit. The permit requires the City to meet Clean Water Act
requirements relating to pollution reduction in local and regional waterways. The City initiated
a comprehensive program to meet permit requirements through the formation of a Stormwater
Utility enterprise to fund necessary program activities. In the absence of such a funding
mechanism, these federally mandated activities would have to be supported by the general fund.
This would deplete revenues which have previously been allocated for other purposes.
On July 15, 1996, a new permit was adopted by the Regional Water Quality Control Board to
supplement the original three-year permit which had expired. This new permit includes a
requirement that the City establish programs and develop a Watershed Management Plan.
The mandated permit activities include creating.a work plan for the runoff monitoring program,
providing better information regarding deficiencies in drainage facilities, mapping drainage
areas, and linking land use classifications with associated quality and quantity of runoff. On
January 19, 1995, after a comprehensive RFQ and interview process, the City Council
authorized Woodward -Clyde Consultants to prepare the City's Stormwater Management Plan.
Phase I of the Plan has been completed. This phase included the design of an Automated
Mapping System and completion of Citywide aerial mapping. Phase I also included the
development of detailed steps for completion of the Stormwater Management Plan and
implementation of stormwater field operations.
Phase II of the plan was authorized on February 27, 1996, and is in the final stages. Phase II
included procurement of specialized automated mapping software and input of digitized data
from the aerial mapping completed in Phase I. The result is a complete Automated Mapping
System that encompasses the entire City. The system includes parcel -specific data and
information on all storm drainage facilities, including deficiencies, and the cost of various
options for improvement.
appnOoffl Agenda Item: 500
PHASE III OF THE STORMWATER MANAGEMENT
PLAN INCLUDING AUTOMATED MAPPING
April 22; 1997 - Page 2
Upon finalization of the drain information on the Automated Mapping System, staff will submit
the facility data and other required information to Los Angeles County and the Regional Water
Quality Control Board as part of the evidence of the City's compliance. The Automated Mapping
System will be an important part of assisting with compliance with the new permit which was
issued in July 1996, and will significantly benefit City staff and the public by providing new
information and more efficient information access.
Now that the new permit has been issued, the City must proceed immediately with Phase III.
There are numerous specific deadlines which must be met. The scope of work and costs for the
work are attached. These costs were anticipated when the Stormwater Utility was established
and were included in the three-year Utility start-up budget. Since Santa Clarita is a fairly new
city, many of the records and maps required for compliance did not exist and have to be
established.
The City did a request for proposals for the Stormwater Management Plan. The City received
eleven proposals in response to the request for qualifications process. The eleven firms were:
1. Anil Verma Associates, Inc., Los Angeles
2. Dwight French & Associates, Diamond Bar
3. Simons Li & Associates., Inc., Newport Beach (teamed with Tetra Tech)
4. Willdan Associates, Anaheim (teamed with CDM)
5. P&D Technologies, Orange (teamed with DART)
6. Boyle Engineering, Newport Beach (teamed with Psomas)
7. BSI Consultants, Inc., Orange County
8. Gannett Fleming, Anaheim
9. Hawkes & Associates, Ventura
10. Woodward -Clyde, Santa Ana (teamed with Sikand)
11. Holmes & Narver, Orange (teamed with Metrex)
Six of the responding firms were invited for interviews, with the top three rated as follows:
1) Woodward -Clyde; 2) Boyle Engineering, and 3) P&D Technologies. Woodward -Clyde was the
top firm and has signed the proposed contract. Funds for this purpose in the amount of
$397,225 have been appropriated in Account Nos. 4510-8001 and 4510-8068.
RECOMMENDATION
City Council direct the City Manager to execute the contract with Woodward -Clyde Consultants
in the amount of $397,225 for Phase IH of the Stormwater Management Plan including the
Automated Mapping System.
ATTACHMENT
Scope of Work
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EXHIBIT A
City of Santa Clarita
Phase III - Task Descriptions
5.7 Create Critical Area Mapping Coverage's
The coverage's identified below will be added to the City's GIS as derived from available
documents and GIS sources:
• liquefaction areas
• landslide areas
• special study zones (Alquist-Priclo)
• sensitive environmental areas
•. Federal Insurance Rate Map Index (FIRS
• L.A.. County•,Floodway Maps
These coverage's can be created at the discretion and authorization of the City's Project
Manager. These coverage's may be produced by City staff.
Deliverable: GIS coverage's of the critical area mapping
Estimated Completion Time: 4 months
5.11 Develop database maintenance procedures
During the development of the City's database, the process and procedures required for
maintaining the database will be documented. This task includes developing a written record
of the procedures to be used for ongoing updating and maintenance of the database. Any
computer programs or macros developed during the database creation process will be
documented and included for use by the City.
Deliverable: Database maintenance procedures document
Estimated Completion Time: 3 months
Meetings
Throughout Phase III regular meetings are required to communicate progress and discuss
project issues and direction. Meeting between the City and the consultants, as well as
between the consulting team are required on a regular basis.
Deliverable: Summary of meetings
Estimated Completion Time: At the completion of Phase III activities
6.1 GTS Cost Benefit Index work map
This task will involve the development of a GIS interface between the Stormwater
Management Model results and the geographical data. The purpose is to graphically display
the results of the hydrologic model, including flood flows and hydraulic deficiencies, on the
GIS. The relative cost -benefit factor will also be displayed as part of the GIS computerized
display.
Deliverable: GIS interface custom program
Estimated Completion Time: 3 months
6.2 SMP Model Coverage's
Collect data and develop GIS coverage's of additional hydraulic structures within the City of
Santa Clarita that may effect drainage. Specifically this task includes the addition of an new
GIS overlav that will include pipe and wire revetments within the City. boundaries. The City
will provide the plans and locations of all facilities to be added to the GIS. Tire consultant va
digitize and add this coverage to the GIS as a separate overlay.
Deliverable: Digital database of pipe and wire revetment infrastructure
Estimated Completion Time: 3 months
6.5 Processing Hydraulic structure input
This task includes data collection and field inspection of selected hydraulic features within the
Santa Clarita study area. Several areas modeled in Phase II will require field inspection and
the collection and processing of additional information to improve model accuracy.
Deliverable: Digital data added to the GIS
Estimated Completion Time: 3 months
6.6 Verification of hydrologic model with updated data
Data from Task 6.5 will be supplemented based on preliminary model results. Updated data
will be added to the hydrologic model to verify the results from Phase II. The hydrology and
hydraulic model will be modified to reflect the updates from Task 6.5 and the model will be
re -tun to simulate the new model conditions.
Deliverable: Verified model results
Estimated Completion Time: 5 months
6.8 GIS hardware and software support
This task will include on-call system and software support for the duration of this Phase. This
task also includes the development of City requested software development to support the
GIS. As required, efforts to support and assist in the development and maintenance of new or
revised GIS related computer databases will be provided under this task.
Deliverable: GIS hardware and software support
Estimated Completion Time: Phase III duration
7.1 Collection, processing, and digitizing GIS input of pipe lateral and additional
detailed hydraulic structures
This task includes the collection, processing, digitizing, and QA/QC of detailed drainage
information. Supplemental drainage information will be added to the hydraulic system
database for use in the hydrologic model, Collect and process data including laterals, debris
dams, catch basins, and hydraulic structures.
Deliverable: GIS data and maps
Estimated Completion Time: 3 months
7.2 GIS processing of drainage information for input to the hydrologic models
This task involves the processing of GIS information into a format suitable for input to the
hydrologic models used to simulate the City's storm drain system. Each for the 15 watersheds _
have significant lard use, topography, and drainage structure information which must be
transferred to a format for use in the stormwater models.
Deliverable: Hydrologic data for use by stcrmwater models
Estimated Completion Time: 4 months
7.3 Support and assist in computer data maintenance procedures
Given the huge amounts of hydraulic data developed form various sources and input into the
GIS, it is imperative to develop and execute a procedure to manage this information. This
task will identify the needed management systems.
Deliverable: Data management procedures
Estimated Completion Time: 4 months
7.4 Program management
Proiect communication will be provided on a regular basis with the City's program manager.
This task also includes internal team project communications and review of team deliverables.
('rereral project management and project direction are also included under this task.
Deliverable: Coordination and Progress reporting
Estimated Completion Time: Phase III duration
7.5 Technical support for the Arc/LYrO and ArcView programs
This task will provide training and support to City staff for Arc/DMO and ArcView
programming on an as needed basis.
Deliverable: Technical support
Estimated Completion Iime: Phase III duration
TOTAL COST FOR PHASE III OF THE STORMWATER MASTER PLAN
AND THE AUTOMATED MAPPING SYSTEM
Section 5.0 - GIS Tasks
5.7 Critical Area Mapping - Liquefaction, Landslides, Special Studies
Zones, SEAS, FIRM, Floodways $ 47,075
5.11 Database Maintenance Procedures 26,328
Meetings 6,822
5.0 Subtotal $ 80,225
Section 6.0 - Mapping and GIS Tasks
6.1
GIS work to create CBI work map
$ 18,000
6.2
SMP Model Coverages - additional mapping for pipe and wire
revetment and other facilities
24,000
6.5
Processing hydraulic structure input
35,000
6.6
Verification and reprocessing of data
60,000
6.8
GIS hardware and software support
18,00
6.0 Subtotal $155,000
Section 7.0 - Additional GIS Tasks
7.1 Collection, processing, digitizing and checking of GIS data input $ 77,000
7.2 Collection, processing and GIS input of pipe lateral and additional
detailed drainage structures 32,000
7.3 Support and assist in database maintenance procedures 6,000
7.4 Additional program management 12,000
7.5 Technical support for the Arclnfo and ArcView programs 5.00
7.0 Subtotal $132,000
Contingency $ 30,000
Phase III Subtotal $397,225
Consultant shall not commence any work without written work orders from the City Engineer.
Scope of work is based on the Final Phase II work plan dated August 1995.
Scope may be modified by the City Engineer if necessary.
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