HomeMy WebLinkAboutCC 7 FLD CNTL STORM DR 02-03-86 CONSENT CALENDAR
JANUARY 22, 1986 Inter Corn
DATE:
TO:
FROM:
SU BJ ECT:
WILLIAM HUSTON, CITY MANAGER
BOB LEDENDECKER, DIRECTOR OF PUBLIC WORKS/CITY ENGINEER
AGREEMENT FOR REGIONAL MASTER PLAN FOR FLOOD CONTROL AND STORM DRAINAGE
RECOMMENDATION:
That the Tustin City Council, at their meeting of February 3, 1986, authorize the
Mayor to execute the Agreement for Regional Master Plan for flood control and
storm drainage within the San Diego Creek drainage area, subject to final approval
of the City Attorney's office and authorize a supplemental budget appropriation
for 1985-86 in the amount of $5,000.00 for Tustin's total share (8.33%) of the
first year cost.
BACKGROUND:
The staffs' of The Irvine Company, City of Irvine and City of Tustin have been
working on a plan to provide an updated master plan for flood control and storm
drainage within the San Diego Creek drainage area. The major purpose for
developing this master plan is to assure a uniform regional analysis of flood
hazards and to develop a model of the flood control and storm drain facilities
required to provide flood protection to homes and businesses during the 100 year
storm conditions.
This master plan will ultimately be presented to the Orange County Flood Control
District for the approval and inclusion into their overall Flood Protection
Program.
DISCUSSION:
The attached Agreement provides for a cooperative effort between The Irvine
Company and cities of Irvine and Tustin. The master plan is proposed to be
developed over a two fiscal year period of 1985-86 and 1986-87. Costs for the
1985-86 fiscal year are estimated to $60,000.00 and would be distributed as
follows:
The Irvine Company ..... $30,000.00 (50%)
City of Irvine ......... 25,000.00 (41.67%)
City of Tustin '- ........ 5,000.00 (8.33%)
$60,0O0.00
Cost for fiscal year 1986-87 have not been developed but it is anticipated that
they will be equal to or less than the $60,000.00 for 1985-86.
The study area pertaining to Tustin will be almost totally related to that area
identified as the East Tustin Specific Plan area and more specifically the Peter's
Canyon Wash and the E1Modena-Irvine Channel watersheds.
JANUARY 22, 1986
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The plan has been divided into four phases as follows:
Phase I
Study alternative plans for the required major flood control
system including alignments, diversions, detention facilities,
land requirements and cost estimates.
Phase II
Preparation of the final hydraulic plan and profile,
cross-sections and cost estimates for the major flood control
system identified in Phase I.
Phase III -
Based upon the major flood control system determined in Phase II,
determine the location size, cross-section and cost of local
storm drains required to assure lO0-year flood protection to
existing and planned homes and businesses.
Phase IV - Development of a final report combining the results of
Phase I, II and III.
The anticipated schedule for this plan is as follows:
Phase Start Date Complete Date
I February, 1986 March, 1986
II March, 1986 June, 1986
III July, 1986 October, 1986
IV October, 1986 January, 1987
This Agreement is currently being reviewed by the City Attorney's office and that
review will hopefully be completed by February 3, 1986 when City Council action is
requested.
Bob Ledendecker
Director of Public Works/City Engineer
BL:jr
cc: Ron Nault
Attachment
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DRAFT AGREEMENT
Agreement No.
AGREEMENT
THIS AGREEMENT MADE AND ENTERED INTO THIS
BY AND BETWEEN
AND
AND
DAY OF 1986.
THE CITY OF IRVINE, hereinafter referred to
as "IRVINE";
THE CITY OF TUSTIN, hereinafter referred to
as "TUSTIN";
THE IRVINE COMPANY, hereinafter referred to
as "COMPANY".
W I TNESSETH
WHEREAS, the San Diego Creek drainage area, including the Peters Canyon
drainage area, is presently served by a large number of natural, partially
improved, and improved flood control and storm drain facilities, and
WHEREAS, the areas of jurisdiction of IRVINE and TUSTIN and the sphere
of influence of IRVINE include much of the San Diego Creek drainage area,
and
WHEREAS, COMPANY is the major landowner in the San Diego Creek drainage
area, and
WHEREAS, IRVINE, TUSTIN, and COMPANY are desirous of assuring that a
fully integrated, economic flood control and storm drain system is developed
within IRVINE's and TUSTIN's incorporated limits and spheres of influence
through the use of a current master plan for flood control and drainage, and
WHEREAS, existing flood control and storm drain master plans are no
longer current and need to be updated to reflect current hydrology and land
use planning and the most economical system including diversions and
detention facilities, and
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WHEREAS, IRVINE, TUSTIN, and COMPANY, hereinafter collectively called
"PARTIES", wish to join together to develop and adopt an updated regional
master plan for flood control and storm drainage, hereinafter referred to as
REGIONAL PLA~, to assure the orderly and economic development of these
facilities, and
WHEREAS, the PARTIES intend to adopt the REGIONAL PLAN and will seek to
have the Orange County Flood Control District adopt the REGIONAL PLAN as
the District's Master Plan for the San Diego Creek drainage area and in
developing the REGIONAL PLAN will use the hydrology currently approved by
the Orange County Flood Control District.
NOW, THEREFORE, the PARTIES hereby agree as follows:
I. A major purpose for developing the REGIONAL PLAN is to assure a
uniform, regional analysis of flood hazards, to develop a model of the flood
control and storm drain facilities required to provide flood protection to
homes and businesses during the lO0-year flood under master-planned
'development conditions, to identify deficiencies in existing systems, to
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describe the preferred physical solutions, and to seek adoption of the
REGIONAL PLAN by the PARTIES.
2. The PARTIES will jointly finance and manage the development of the
REGIONAL PLAN within those portione of the San Diego Creek drainage area
including Peters Canyon drainage that are within the incorporated limits of
IRVINE and TUSTIN or within their spheres of influence and the tributary
areas, all as shown on the attached map entitled "Drainage Area Boundary for
Regional Plan".
3. Where necessary to accurately complete the REGIONAL PLAN, work will
be done in adjacent,.upstream, or downstream drainage areas outside the
spheres of influence of IRVINE and TUSTIN.
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4. The REGIONAL PLAN when completed will include the alignment,
hydraulic plan and profile, and cross-section of all channels and storm
drains and the location, size and configuration of detention facilities.
5. The' currently approved Orange County Hydrology Manual or County-
approved alternative will be used for the final REGIONAL PLAN. Preliminary
studies done as part of the REGIONAL PLAN may use other hydrology methods
felt by the PARTIES to reasonably represent the hydrologic and hydraulic
conditions of the watersheds. All studies will use IRVINE's and TUSTIN's
s~andards for local storm drainage design.
6. As part of the development of the REGIONAL PLAN the PARTIES will
develop for distribution to the PARTIES a hydrologic model of the REGIONAL
PLAN that can be operated on personal computer-type hardware and which can
be adjusted and updated in the future to aid in the analysis of proposed
changes to the REGIONAL PLAN and to determine the effect of a phased
implementation of the facilities described in the REGIONAL PLAN.
7. The development of the REGIONAL PLAN shall be directed by a Steering
Committee made up as fol lows:
IRVINE - City Engineer, Chairman
TUSTIN - City Engineer
COMPANY - Director, Water, Waste and Energy Issues
Meetings may be called by the Chairman or other members. At least one
meeting will be held quarterly. Minutes of decisions made at all meetings
shall be recorded and distriDuted to the committee members.
8. The REGIONAL PLAN will be developed over a two fiscal year period.
The funding of the development of the REGIONAL PLAN shall be shared by the
PARTIES. The agreed-upon costs for the 1985-1986 fiscal year will be as
follows:
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IRVINE $25,000
TUSTIN $ 5,000
COMPANY$30~00Q
Total - $60,000
The distribution of costs which shall be used for 1985-1986 and 1986-
1987 fiscal years is based on the agreement that COMPANY will pay one-half
the cost and that IRVINE and TUSTIN will share the balance in proportion to
the land area within TUSTIN's city limits and the land area within IRVINE's
sphere of influence within the San Diego Creek drainage area including
Peters Canyon Channel. These proportions are:
IRVINE - 84%
TUSTIN - 16%
The Steering Committee shall make an estimate of the cost to be shared
by the PARTIES for fiscal year 1986-1987 by March 15, 1986 and shall submit
it to each party for budgeting. Should any party be unable to fund its
share, the other parties may fund the missing share and complete the
REGIONAL PLAN.
9. It is agreed that COMPANY shall employ the services of one or more
professional engineering consultants agreed to by the Steering Committee to
develop the REGIONAL PLAN for the PARTIES in accordance with a scope &work
approved by the Steering Commi'ttee. The cost of services shall be limited
to those set forth in Paragraph 8. IRVINE's, TUSTIN's, and COMPANY's
required contributions are limited to those defined herein.
10. IRVINE and TUSTIN shall deposit with COMPANY their respective shares
for development of the REGIONAL PLAN. The deposits shall be made in each
fiscal year for the cost as described in Paragraph 8 for that fiscal year.
The deposits for fiscal year 1985-1986 shall be made by February 15, 1986
and for fiscal year 1986-1987 by August 1, 1986.
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11. Should the actual cost for completing the REGIONAL PLAN be less
than the funds deposited with COMPANY by IRVINE and TUSTIN and COMPANY's
share, PARTIES shall share the total cost in proportion to their
contributions. Any surplus funds will be returned to IRVINE and TUSTIN in
proportion to their total contribution upon completion of the REGIONAL PLAN.
12. It is the intent of the PARTIES to this agreement to have the work
required to develop the REGIONAL PLAN done in phases. This will assure
development of the most urgently needed elements of the work at the
beginning of the study and will assist all the PARTIES to more effectively
plan land development before the entire REGIONAL PLAN is completed and
adopted. The phases are:
Phase I: Study alternative plans for the major flood control system
including alignments, diversions, detention facilities, land required, and
cost estimates as directed by the Steering Con~nittee.
Phase II: Prepare final hydraulic plan and profile, cross sections, and
cost estimates for the major flood control system chosen by the Steering
Committee from the results of Phase I. All existing deficiencies will be
identified.
Phase III: Using the major flood control system approved by the
Steering Committee, perform additional studies to determine the location,
size, cross section, and cost of local storm drains required to assure 100-
year flood protection to existing homes and businesses and to meet existing
IRVINE and TUSTIN criteria for street drainage.
Phase IV: Following approval by the Steering Committee of Phases I, II,
and III, develop a report combining the results of Phases I, II, and III,
including alignments, hydraulic plan and profile, diversions, detention
facilities, cost estimates, and a phasing plan where a special sequence of
flood control or storm drain construction is desirable. The report shall
describe the process that was used to develop the master plan, including
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coordination 'with affected agencies, the responses of these agencies, the
alternatives that were considered but not adopted, and the reasons for their
not being ~dopted. It shall include a phasing plan incorporating the
timetables of the Caltrans freeway widening, The Irvine Company land
development program, other agency schedules, interim drainage facilities as
needed, and the criteria and schedule for upgrading interim facilities to
permanent facilities. It shall include hydrology, hydraulics, preliminary
plans, profiles, cross sections, and cost estimates of the master plan
facilities. It shall include multiuse and joint venture opportunities and a
statement about the effect of the master plan on the Upper Newport Bay
Sedimentation Control Program.
For general purpose use by the PARTIES, develop the software of the
hydrologic and hydraulic model used in Phases I, II, and III including
sufficient narrative to allow a hydrologist to independently use the model.
This Phase includes seeking adoption of the REGIONAL PLAN by the PARTIES and
Orange County Flood Control District.
13. Phase I will be started immediately by COMPANY and the cost for all
Phases will be charged to the PARTIES as described in Paragraph 8.
14. The PARTIES will use their best efforts to seek adoption of the
REGIONAL PLAN by the Orange County Flood Control District and will each
adopt the plan for their use.
15. It is recognized by the PARTIES that the REGIONAL PLAN, once
adopted,, may be revised from time to time.
16. The attached Scope of Work and Schedule for the Regional Plan are
to guide the development of the REGIONAL PLAN. Should adjusbments to the
Scope of Work be required during the development of the REGIONAL PLAN, they
may be made at the direction of the Steering Con~ittee.
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CITY OF IRVINE
Dated:
ATTEST:
, 1986 B~
Mayor
APPROVED AS TO FORM:
City Clerk
CITY OF TUSTIN
-Dated:
ATTEST:
City Attorney of Irvine
, 1986 By
Mayor
APPROVED AS TO FORM:
City Clerk
THE IRVINE COMPANY
Dated:
City Attorney of Tustin
, 1986 By
President
APPROVED AS TO FORM:
Attorney for The Irvine Company
Senior Vice President
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CITIES OF IRVINE, TUSTIN, AND THE IRVINE COMPANY
FLOOD CONTROL SYSTEM MASTER PLAN AND IMPLEMENTATION PROGRAM
Scope of Work
This scope of work defines the tasks required to develop for the Cities
of Irvine and Tustin and The Irvine Company a flood control master plan and
implementation program to be called the Regional Plan. This Plan is being
developed by the three entities to assure an integrated system and
implementation policy that reflects the interests of the three entities.
The work will be closely coordinated with the County and recommended for
adoption by Irvine, Tustin, The Irvine Company, and the County of Orange.
The geographical areas include those areas tributary to San Diego Creek
including Peters Canyon Channel within the City of Irvine and its sphere of
influence and within the City of Tustin.
The objectives of this ~ork are to develop the physical configuration of a
master-planned flood control and drainage system that will provide lO0-year
flood protection meeting the standards of the National Flood Insurance
Program, minimize flood control and storm drain construction costs, reflect
the plans of other government agencies and land development plans, promote
multiuse of facilities, meet County standards for operation and maintenance,
and assure full use of existing facilities. In addition, it will describe
the phasing of interim and permanent flood control and drainage facilities,
wi l 1 consider the sediment management objectives for Upper Newport Bay, and
will identify multi-entity opportunities for cooperative ventures. It will
also develop a computer model for use by all interested parties in future
analysis and updating.
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The work will be directed by a steering committee made up as follows:
City of Irvine - City Engineer, Chairman
City of Tus~in - City Engineer
The Irvine Company - Director, Water, Waste, and Energy Issues
Periodic briefings will be held to al low the steering committee full
involvement in the program and to allow timely adjustments to the program.
The work will be developed in four phases to meet the needs of the
sponsoring parties. The phases and the related tasks are:
Phase I: Study alternative plans for the major flood control system
including alignments, diversions, detention facilities, land required,
and cost estimates as directed by the Steering Committee.
Task 1. Gather Existing Data, Plans, Schedules, Standards, and Criteria
a. Obtain from Orange County all existing flood control master
plans, hydrology reports, project reports, sediment analyses,
data on existing facilities, topographic mapping, land-use
plans, criteria for acceptance for operation and maintenance,
flood control and bridge plans, construction schedules, soils
data, and hydrologic data.
b. Obtain from the Cities of Irvine and Tustin all existing flood
control and drainage master plans, land-use plans, hydrology
reports, project reports, topographic mapping, street drainage
criteria, development drainage criteria, multiuse
possibilities, data on existing facilities, bridge plans,
construction schedules, and opportunities for joint ventures.
c. Obtain from The Irvine Company all existing flood control and
drainage master plans, hydrology reports, topographic mapping,
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~ask 2.
project reports, development phasing plans and schedules,
multiuse possibilities, data on existing facilities, land-use
plans, bridge plans, construction schedules, and opportunities
for joint ventures.
Obtain from Caltrans data on existing drainage structures,
topographic mapping, freeway widening plans and construction
schedule, drainage plans and reports, and opportunities for
joint ventures.
Obtain from FEMA Flood Insurance Rate Maps and floodway maps,
hydrology studies, hydraulic studies, and the standards and
criteria of the National Flood Insurance Program.
Obtain from the USMCAS E1 Toro all drainage master plans,
reports, studies, drainage facility inventories, construction
schedules, multiuse possibilities, and opportunities for joint
ventures.
Obtain from any other sources information, plans, data, and
schedules that will facilitate the master plan.
Develop Preliminary Regional Plan Concept for Steering
Con~nittee Approval
Utilizing existing data, develop a preliminary Regional Plan
Concept for the major flood control facilities that indicates
the alignment of channels, alternative detention sites, known
restrictions, possible diversions, subarea breakup, land uses,
and possible flow splits. Consider and prepare a
recommendation on the most effective method to develop the
hydrology and hydraulic studies required to study the
alternatives proposed. The preliminary Regional Plan Concept
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will be based on coordination with the sponsoring parties and
other affected agencies, such as Caltrans, USMCAS E1 Toro,
Orange County, and the Upper Newport Bay Sediment Management
Executive Con~ittee.
Task 3. Brief Steering Committee on the Regional Plan Concept,
Hydrology, and Hydraulics
This task will utilize the information developed in Task 2 to
prepare and conduct a briefing for the Steering Committee and
obtain direction on the alternatives to be studied in detail
and the hydrology and hydraulic approach to be used.
Task 4. Evaluate Regional Plan Alternatives Approved in Task 3 and
Present Recommended Plan to Steering Committee
This task includes detailed hydrologic and hydraulic
calculations for the alternatives approved in Task 3. This
task will result in defining the configuration, size,
alignment, location, and cost estimates of channels, detention
basins, and other facilities for the alternatives approved by
the Steering Committee. A phased implementation plan shall be
included in the recommendation. This task will include a
briefing of the Steering Committee and will result in approval
of the master plan configuration.
Phase II: Prepare the final hydraulic plan and profile, cross sections,
and cost estimates for the major flood control system chosen by the
Steering Committee from the results of Phase I. All existing
deficiencies will be identified.
Phase III: Using the major flood control system approved by the Steering
Committee, perform additional studies to determine the location, size,
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cross section,'and cost of local storm drains required to assure 100-
year flood protection to existing homes and businesses and to meet
existing Irv~ne and Tustin criteria for street drainage.
Phase IV: Following approval by the Steering Con~nittee of Phases I, II,
and III, develop a report combining the results of Phases I, II, and
III, including alignments, hydraulic plan and profile, diversions,
detention facilities, cost estimates, and a phasing plan where a special
sequence of flood control or storm drain construction is desirable. The
report shall describe the process that was used to develop the master
plan, including coordination with affected agencies, the responses of
these agencies, the alternatives that were considered but not adopted,
and the reasons for their not being adopted. It shall include a phasing
plan incorporating the timetables of the Caltrans freeway widening, The
Irvine Company land development program, other agency schedules, interim
drainage facilities as needed, and the criteria and schedule for
upgrading interim facilities to permanent facilities. It shall include
hydrology, hydraulics, preliminary plans, profiles, cross sections, and
cost estimates of the master plan facilities. It shall include multiuse
and joint venture opportunities and a statement about the effect of the
master plan on the Upper Newport Bay Sedimentation Control Program.
For general purpose use by the parties, develop the software of the
hydrologic and hydraulic model used in Phases I, II, and III including
sufficient narrative to allow a hydrologist to independently use the
model. This phase includes seeking adoption of the Regional Plan by the
parties and the Orange County Flood Control District.
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Phase
Phase I
Phase II
Phase III
Phase IV
SCHEDULE FOR REGIONAL PLAN
Start Date
February 1, 1986
March 15, 1986
July i, 1986
October 1, 1986
Completion Date
March 15, 1986
June 15, 1986
October 1, 1986
January 1, 1987
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