HomeMy WebLinkAbout1978-07-04; City Council; 5493; Calavera Dam Maintenance ProgramCITY OF CARLSBAD
AGENDA BILL NO. vT^? 3 Initial: S}
Dept.Hd. JC
DATE: July 4, 1978 c> Atty>
DEPARTMENT: Public Works C. Mgr.
Subject:
CALAVERA DAM MAINTENANCE PROGRAM
APPROVAL OF AN AGREEMENT FOR CONSULTING SERVICES
Statement of the Matter
A report from the Director of Utilities/Maintenance concerning '
Calavera Dam was presented to City Council at the March 8, 1978
meeting. Attached (Exhibit 1) is a report of actions taken since
that time for your review. Woodward-Clyde Consultants has pro-
posed a work program relating to additional inspection and devel-
oping recommendations for required maintenance. Cost of this
program is estimated to be $6,000 and would be billed in accordance
with a standard rate schedule.
Exhibits
1. Memo from Director of Utilities/Maintenance dated 4/24/78.
2. Resolution No. ^f~*/73 approving an agreement between the City of
Carlsbad and Woodward-Clyde Consultants and authorizing the Mayor
to execute same. " .
3. Resolution No. \5~tf7*Jauthorizing a transfer of funds in the
amount of $6,000 for consultant services for the Calavera
Dam maintenance program.
Recommendation
If Council concurs: (1) Adopt Resolution No. ^V73 approving agreement
between the City and Woodward-Clyde Consultants for consultant services
for Lake Calavera Dam and authorizing Mayor to execute agreement; and
(2) Resolution No. ^5-^7^ authorizing a transfer of funds in the .amount
of $6,000 from Water System Reserves, Account 51-000-0900, to Water
Professional Services, Account 51-243-2450.
Council action:
7-5-78 Council directed staff to file the matter with no further action.
78-100
'April 24, 1978
MEMORANDUM
TO: City Manager
FROM: Director of Utilities & Maintenance
SUBJECT: Calavera Dam; Status Update
This is a memo to advise you of recent actions relating to Calavera Dam
and updates the information provided to Council on March 8, 1978.
I met with representatives of Woodward-Clyde Consulting Engineers to
discuss the dam and make a site visit. I requested that they review
previous State inspection reports and a report prepared for the County
by Boyle Engineering in 1974 - and based upon their inspections and
review of the literature, to provide a proposal for services to:
1. Identify any shortcomings in our present maintenance program
or operating procedure;
2. Conduct any inspections which they might deem appropriate to
confirm the structural integrity of the dam;
3. Make recommendation for preventative maintenance efforts.
Attached is a copy of their proposal which outlines the work proposed and
an estimate of the costs for these consultant services at a cost not to
exceed $6000. I believe it significant that their proposal relates primarily
to soil engineering work concerning the drainage channel rather than any
additional work relating to the dam structure. This confirms my conversations
with the engineer that, in his opinion, the dam structure is sound and mainten-
ance efforts are appropriate. A copy of the proposal is attached.
The annual inspection of the dam by the Division of Safety of Dams of the State
Department of Water Resources was conducted on March 23 by Glen Swanson. Mr.
Swanson had conducted previous inspections of the Calavera Dam and is familiar
with it. A copy of his report is also attached. The report confirms the
structural integrity and indicates satisfaction with the maintenance and
operating procedures. Additionally, notation is made for the need for work
on the spillway and the channel.
Additionally, Mr. Ray Coleman, who addressed Council on March 8, wrote to the
Division of Safety of Dams in late March and outlined his concern. A copy of
their reply to him is attached for your information.
The lake is presently 3V below the spillway. We have not had any spills since
the one which occurred during February. Recent rainstorms have not resulted in
significant run-off and the lake level has remained relatively constant. I
EXHIBIT 1
Calavera Dam (continued)-2-April 24, 1978
believe that the additional inspections and reports since March 8 do not provide
any new information and, in my opinion, confirm my statement to you that "We
are, in my opinion, operating the dam in a prudent manner such as to minimize
storm impact on the structure and minimize flooding downstream".
I do recommend that Woodward & Clyde be retained to carry out the scope of
work they have outlined. I will prepare an Agenda Bill requesting Council
approval and authorization to transfer funds from reserves for the project.
ROGgR W. GREER
Director of Utilities & Maintenance
Attachment
RWGrpag
3467 Kurtz Street
San Diego, California 92110
714-224-2911
Telex 697-841
Woodward-Clyde Consultants
April 14, 1978
Project No. 58166V-EC01
78P5189
City of Carlsbad
405 Oak Street
Carlsbad, California 92008
Attention: Mr. Roger W. Greer, Director
Utilities and Maintenance
PROPOSAL FOR ENGINEERING CONSULTATION
CALAVERA LAKE DAM
SAN DIEGO COUNTY, CALIFORNIA
Gentlemen:
At your request, we have visited Calavera Lake Dam, reviewed a report
entitled "Preliminary Design Report for Calavera Dam," prepared by Boyle
Engineering Corporation (dated February, 1974), and reviewed the reports
of inspections made by the Department of Water Resources, Division of
Safety of Dams on August 13, 1976, and February 9, 1977.
The site visit was made on March 10, 1978, by Mr. Bob Neely and yourself
from the City of Carlsbad, and Mr. Louis Lee and myself of our firm.
The visit revealed a nearly full reservoir with no apparent seepage,
and outlet works open to allow lowering of the lake level. Some erosion
was observed in the bottom of the side-channel spillway, apparently due
to recent spillage of the reservoir. In general, the dam appeared to be
functioning satisfactorily.
PROPOSED SCOPE
Based on our brief review of the aforementioned reports, the site visit,
and our disccusions, we propose to provide the following services to the
City of Carlsbad for Calavera Lake Dam:
(1) Examine the outlet works and control valves after dewatering
for signs of embankment distress or leakage.
(2) Perform a geologic reconnaissance and make an evaluation of
the stability of the spillway slopes.
Consulting Engineers, Geologists
and Environmental Scientists
Offices in Other Principal Cities
City of
Pro]LtV.958i66V-ECOl Woodward-dyde Consultants
78P5189
Page 2
(3) Inspect and photograph the spillway after each significant
spill to evaluate erosion trends and patterns (assumes 3
site visits over a period of 12 months).
(4) Recommend certain maintenance steps that become apparent
during our site visits.
COST ESTIMATE
We estimate the cost of these services to be approximately $6,000,
including preparation of a report of the results of spillway backslope
stability evaluation, outlet works inspection, an initial inspection of
spillway erosion, and a meeting to discuss our findings with repre-
sentatives of the City of Carlsbad. We will not exceed the amount of
$6,000 without further authorization from you. We propose to perform CITY
our services and invoicing in accordance with the attached Schedule of STAFF NOTE:
Charges and Conditions. SEE AT-
TACHMENT TO
Consultation and engineering analysis that may be requested after sub- DRAFT AGREE
mission of the report, for the purpose of making analyses of modifica- MENT
tions to the project or developing supplementary information, will be
charged at hourly rates for personnel and at unit prices for laboratory
testing.
PROFESSIONAL LIABILITY
The City of Carlsbad and Woodward-Clyde Consultants acknowledge that it
is in the public interest to have objective evaluations as outlined
above. It is also acknowledged that the current professional liability
environment in California would preclude the possibility of an objective
evaluation being made, or alternatively would pose intolerable pro-
fessional liability risks to the consultant, which would not accrue to
the government of the City of Carlsbad or its employees.
It is the intent of this agreement that the consultant be provided the
same protection against professional liability costs arising out of
failure or damage to Calavera Lake Dam and appurtenances, as the City of
Carlsbad or its employees would have.
The City of Carlsbad and Woodward-Clyde Consultants agree that the City
of Carlsbad will hold harmless, indemnify, and defend Woodward-Clyde
Consultants and its employees, agents, and consultants against liability
for injuries and damages to the owners, its employees, agents, con-
tractors, and third parties, incident to or resulting from services
performed and advice given by Woodward-Clyde Consultants in connection
with our consulting services for Calavera Lake Dam.
I
City of
P?ojecl4No!958l66V-ECOl Woodward-Clyde Consultants
78P5189
Page 3
We appreciate the opportunity of offering this proposal and we look
forward to working with you on this project. If this proposal meets
with your approval, please sign where noted below and return the
original to this office.
Very truly yours,
WOODWARD-CLYDE CONSULTANTS
James E. Cavallin
Associate
JEC/vm
Attachment
AGREED TO THIS DAY OF , 1978
FIRM ADDRESS
BY
STATE OF CALIFORNIA—RESOURCES AGENCY EDMUND G. BROWN JR., Governor
DEPARTMENT OF WATER RESOURCES
P.O. BOX 388
SACRAMENTO
95802(916) 322-6206
*£AA PR 1978 <&$
APR18 m | *£& "
Mr. Ray J. Coleman
3571 Don Juan Drive
Carlsbad, CA 92008
Dear Mr. Colemani
Calavera Dam and Reservoir, Ho. 647
This is in answer to your letter of March 22, 1978,
regarding Ca laver a Dam and Reservoir. This dam was con-
structed under the supervision of this office and was
completed in 1941. The design and construction met the
approval of the State and a Certificate of Approval
authorising storage in the reservoir was issued on
March 26, 1942. The current Certificate of Approval issued
September 16, 1966, authorizes storage to Elevation 216.5,
the level of the spillway crest.
Calavera Dam and Reservoir is inspected once annually by
a field engineer from this office. The last inspection
was made March 23, 1978. There are no indications that the
dam is unsafe to store water to the level of the spillway
crest as authorized by the Certificate of Approval. Our
experience with City personnel who operate the dam is that
they are conscientious in their operation and maintenance
so as to maintain a safe structure.
In answer to specific questions raised in your letter, the
following is offeredi
The outlet is not an 18-inch steel pipe as described
in your letter. It is a 30-inch reinforced concrete
pipe placed within an adequately designed reinforced
concrete encasement. An outlet of this type should
not deteriorate. There are no indications of any
problems involving the outlet.
Mz. Ray J. Coleman
Pa^e 2
APR 1 8 1978
The general condition of the spillway remains
satisfactory. Where erosion has produced minor voids,
the owner plans to fill these voids with concrete or
gunite as general maintenance. The erosion which has
occurred does not pose a threat to the safety of the
structure.
Rodent burrows and growth of large vegetation on a dam
embankment are detrimental to its condition. Proper
maintenance includes control against these conditions.
The owner is performing proper maintenance.
When we find a dam safe to store water we approve
storage to a specified level. In the case of Calavera
Dam that level is the spillway crest. The method of
operation up to that level is the owner's option.
We hope this letter will satisfactorily answer the questions
you had regarding the safe operation of Calavera Dam and
Reservoir. Thank you for the photographs taken at the danu
They will be placed in our file of Calavera Dam.
Sincerely,
Original signed by
James J. Doody, Chief
Division of Safety of Dams
cc: Assemblyman William A. Craven
Room 5175
State Capitol Building
Sacramento* CA 95814
Attention! Mr. Leonard Elok
Mr. Roger W. Greer
Utility/Maintenance Manager
Division of Utility/Maintenance
City of Carlsbad
405 Oak Avenue
Carlsbad, CA 92008
Mr. Ronald C. Packard, Mayor
City of Carlsbad
1200 Elm Avenue
Carlsbad, CA 92008
7//?
Calavera 847 San Diego
Earth Side Channel
3.5 below 11.0 below at
max. sectio
Inspected with Bob Nee ley. Utility Supt., City of Carlsbad.
Operational evaluation.
Encouraged minor repairs in spillway.
X met Mr. Roger Greer, Utility/Maintenance Manager, prior to
following the inspection. Since the heavy rains in January
February 1978, the City has retained Woodward-Clyde to evaluate
adequacy of the spillway. As reported by Bob Nee ley, the maximum
reservoir level during the heavy rains was about 1 foot above the
spillway level. Mr. Greer said a copy of Woodward-Clyde * s report will
be made available to this office when it is complete.
Mr. Greer reported that some damage (mainly deposits of debris)
occurred during January 1978 at the trailer court about one-half wile
downstream of the dam. However this damage was caused primarily by
peak flood flows from an adjacent watershed which drains into Calavera
Creek between Calavera Dam and the trailer park. Peak flows at the
trailer court reportedly occurred prior to the start of spillway
discharge from Calavera Reservoir.
Embankment
Both slopes of the embankment have been cleared of the large brush
and small trees. There were no indications of instability or other
problems in the embankment.
Seepage
There was no detectable seepage. A small pond of water remained below
the toe of the dam from recent outlet discharges.
Spillway
The side channel spillway remains in general satisfactory condition.
Minor erosion had occurred at the base of the gunite protection
for the side channel weir. Mr. Nee ley said he plans to clean the
eroded areas and fill the small voids with concrete or gunite. Z
encouraged him to complete these plans.
sd G. H. Swanson
4/3/78 3/23/78
3/27/78
x
sheet 1 of 2.
fa a a. - £/n, foft V
f\
Calavera Dan, No. 847
March 23. 1978
Page 2
Some erosion had also occurred in the downstream portion of the
spillway channel. This condition does not present any hazard at
this time. Additional erosion in the weathered granite may be
expected to occur at a slow rate during future spillway discharges.
Mr. Neeley said he would consider placing additional concrete cutoffs
in the channel to control future erosion.
Some sloughing had occurred from the right bank of the spillway
plunge basin. Future spills will carry out this sloughed material.
Major slides into the spillway* which would block flows* are not
likely to occur. However future minor sloughs from this bank may be
expected during spillway operation.
Outlet
The outlet has recently been operated to lower the reservoir level to
3h feet below the spillway. Mr. Nee ley said this storage was evacuated
to provide some downstream flood protection.
The outlet is operated exclusively with the upstream controls.and
discharges freely just below the toe of the embankment. I. requested
that the City continue this method of operation for the outlet.
Conclusion
There was no evidence of any unsafe condition. Minor maintenance is
planned for the spillway.
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RESOLUTION NO. 5473
A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF CARLSBAD,
CALIFORNIA, APPROVING AN AGREEMENT BETWEEN THE CITY OF
CARLSBAD AND WOODWARD-CLYDE CONSULTANTS FOR ENGINEERING
CONSULTATION SERVICES FOR LAKE CALAVERA DAM AND AUTHORI
THE MAYOR TO EXECUTE SAID AGREEMENT
The City Council of the City of Carlsbad, California, dp&s hereby re-
solve as follows:
1. That that certain agreement between the City o/Carlsbad and Woodward-
Clyde Consultants for engineering consultation services for Lake Calavera Dam,
a copy of which is attached hereto, marked Exhibit/, and incorporated herein
by reference, is hereby approved;
2. That the Mayor of the City ofCarlsbdd is hereby authorized and
directed to execute said agreement fc r anjlyon behalf of the City of Carlsbad.
PASSED, APPROVED AND ADOPTjED at Regular meeting of the City Council
of the City of Carlsbad held thel / day of , 1978, by the
~ \~7~following vote, to wit:
AYES:
NOES:
ABSENT:
RONALD C. PACKARD, Mayor
ATTEST:
MARGARET E.
(SEAL)
S, City Clerk
AGREEMENT FOR ENGINEERING SERVICES
TO KECQNMEND A MAINTENANCE PROGRAM
FOR LAKE CALAVERA DAM IN
THE CITY OF CARLSBAD, CALIFORNIA
THIS AGREEMENT, made and entered into as of the day
of , 1978, by and between WOODWARD-CLYDE CONSULTANTS, hereinafter
referred to as Engineer, and the CITY OF CARLSBAD, hereinafter referred to as
City.
WITNESSETH:
WHEREAS, the State Department of Water Resources, Division of
Dams, has made periodic inspections of Calavera Dam to insure an unsafe con-
dition does not exist; and
WHEREAS, the rainfall during the period of January 1, 1978,
to May 1, 1978, has been unusually heavy causing the dam level to rise sig-
nificantly; and
WHEREAS, City Council, on March 8, 1978, requested that City
staff contact a qualified dam engineer to make certain inspections and make
a report;
NOW, THEREFORE, the parties hereunto agree as follows:
ARTICLE I: Scope of Engineering Services
1. The Engineer shall examine the outlet works and control
valves after dewatering for signs of leakage or embankment distress.
2. The Engineer shall perform a geologic reconnaissance
and make an evaluation of the stability of the spillway slopes.
3. The Engineer shall inspect the spillway after each sig-
nificant spill to evaluate erosion trends and patterns. Photographs of each
inspection (estimated to be three visits over a 12-month period) shall be
provided.
4. The Engineer shall make a recommendation on certain cor-
rective maintenance that becomes apparent during Engineer's site visits.
5. The Engineer shall not make stability analyses for the
dam nor provide opinions or conclusions regarding its stability.
ARTICLE II: Scope of City Staff Responsibilities
1. City staff shall provide Engineer with:
A. Any correspondence from the Division of Safety of
Dams relative to the condition of Calavera Dam.
B. Consultations as required during the study.
ARTICLE III: Progress and Completion
1. The engineering services specified herein shall begin
within fifteen (15) days following the execution of this agreement and re-
ceipt in writing of notice to proceed.
2. The final report shall be completed within 360 calendar
days following notice to proceed.
ARTICLE IV: Compensation
1. Fees for engineering services as described in Article I
of this Agreement shall be on an hourly basis not to exceed the amount below:
A. Inspection, geologic reconnaissance, testing, analy-
ses and written report of recommendation - $6,000.
ARTICLE V: Guaranteed Maximum Fee
1. The guaranteed total maximum fee for engineering services
shall be $6,000.
ARTICLE VI: Payment of Fees
1. Fees as set forth in Article TV shall be paid on an hourly
basis in accordance with Exhibit A, "Schedule of Charges and Conditions," at-
tached hereto and made a part hereof.
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ARTICLE VII: Engineering Personnel
1. Personnel to be assigned to this project shall be:
A. Principal - Louis Lee
B. Associate - James Cavallin
C. Project Engineer - as assigned
D. Project Geologist - as assigned
2. Replacement of the above-named personnel shall be subject
to approval by the City.
ARTICLE VIII: Responsibility of the Engineer
1. The Engineer is employed to render a professional service
only, and any payments made to him are compensation solely for such services as
he may render and recommendations he may make in the course of this project.
2. The Engineer makes no warranty, either expressed or implied,
as to his findings, recommendations, or professional advice other than they
were promulgated after following a practice usual to the engineering pro-
fession.
ARTICLE IX: Suspension of Services or Termination of Agreement
1. The City shall have the right to terminate this agreement
and the work done under it at any time without cause by giving the Engineer
notice in writing.
2. In the event of such suspension or termination, upon re-
quest of the City, the Engineer shall assemble the work product and put same
in order for proper filing and closing and deliver said product to City.
3. In the event of termination, the Engineer shall be paid
for work performed to the termination date; however, the total shall not ex-
ceed the guaranteed total maximum. City shall make the final determination
as to the portions of the tasks completed and the compensation to be made.
-3-
ARTICLE X: Status of the Engineer
1. The Engineer shall perform the services provided for
herein in his own way as an independent contractor and in pursuit of his
independent calling, and not as an employee of the City.
2. He shall be under control of the City only as to the
result to be accomplished and personnel or construction firms to be as-
signed to the project. The professional firms to be assigned to the proj-
ect shall be subject to the approval of the City.
ARTICLE XI: Conformity to Legal Requirements
1. The Engineer shall cause all drawings and specifications
to conform to all applicable requirements of law: Federal, State and local.
2. The Engineer shall provide the necessary copies of such
drawings and specifications, together with all necessary supporting docu-
ments, to be filed with any agencies whose approval is necessary.
ARTICLE XII: Ownership of Documents
1. All plans, studies, sketches, drawings and specifications
as herein required are the property of the City whether the work for which
they were made be executed or not.
2. In the event this contract is terminated, all documents,
plans, specifications, and drawings of the project shall be delivered forth-
with to the City.
ARTICLE XIII: Hold Harmless Agreement
1. The City, its agents, officers, and employees shall not
be liable for any claims, liabilities, penalties, fines, or any damage to goods,
properties, or effects of any person whatever, nor for personal injuries to
or death of them caused by or resulting from or claimed to have been caused
by or resulting from any negligent act or omission of Engineer or his agents,
employees, or representatives.
-4-
ARTICLE XVI: Prohibited Interest
1. No official of the City who is authorized in such ca-
pacity on behalf of the City to negotiate, make, accept, or approve, or take
part in negotiating, making, accepting or approving of any architectural,
engineering inspection, construction, or material supply contractor, or any
subcontract in connection with the construction of the project shall become
directly or indirectly interested personally in this agreement or in any
part thereof.
2. No officer, employee, architect, attorney, engineer or
insepctor of or for the City who is authorized in such capacity and on be-
half of the City to exercise any executive, supervisory, or other similar
functions in connection with the performance of this agreement shall become
directly or indirectly interested personally in this agreement or any part
thereof.
ARTICLE XVII: Verbal Agreement or Conversation
1. No verbal agreement or conversation with any officer,
agent, or employee of the City, either before, during or after, the execu-
tion of this agreement, shall affect or modify any of the terms or obliga-
tions herein contained, nor such verbal agreement or conversation entitle
the Engineer to any additional payment whatsoever under the terms of this
agreement.
ARTICLE XVIII: Successors or Assigns
1. Subject to the provisions of Article XIV, all terms,
conditions, and provisions hereof shall inure to and shall bind each of the
parties hereto, and each of their respective heirs, executors, administrators,
successors, and assigns.
ARTICLE XIX: Effective Date
1. This contract shall be effective on and from the day and
year first above written.
-5-
IN WITNESS WHEREOF, we have hereunto set our hands and seals.
ATTEST:CITY OF CARLSBAD
MARGARET E. ADAMS, City Clerk RONALD C. PACKARD, Mayor
APPROVED AS TO FORM:WOODWARD-CLYDE CONSULTANTS
VINCENT F. BIONDO, JR., City Attorney
-6-
3467 Kurt? Street
San Diego. California 92110
714-224-2911
Telex 697-841
Woodward-Clyde Consultants
EXHIBIT B
SCHEDULE OF CHARGES AND CONDITIONS
(January, 1978)
PERSONNEL:
Personnel charges are for technical work. Charges are made for tech-
nical typing as in the preparation of reports and for the time and costs
of printing as in the production of reports. Direct charges are not
made for secretarial service, office management, general accounting and
maintenance, since these items are included in overhead. Current hourly
rates are as follows:
Technical Typist & Staff Assistant $14.00
Illustrator 18.50
Field Inspector, Technical Assistant 23.50
Staff Engineer or Geologist, Lab. and Tech. Supervisor 28.00
Senior Staff Engineer or Geologist, Field Coordinator 33.00
Project Engineer, Geologist or Engineering Geologist 37.00
Senior Project Engineer, Geologist or Engineering Geologist 41.00
Associate 47.50
Principal 55.. 00
Rates for Consultants and Consulting Principals will be provided upon
request. Court appearance as an expert witness will be charged at a
rate of $700 per day, plus expenses. The full day rate will be the
minimum charge for any portion of a day. Preparation for a court case
will be charged at regular hourly rates.
Time spent in travel in the interest of the client will be charged at
hourly rates except that no more than 8 hours of travel time will be
charged in any day. When it is necessary for an employee to be away
from the office overnight, subsistence will be charged. Overtime,
weekend, and holiday work for field personnel will be invoiced at an
additional 25%.
DRILLING AND SAMPLING:
Drill Rig and Driller
Additional Helper, when needed
DIVING:
Per Hour
$52.00
23.50
Overtime
$60.00
29.50
Employees providing diving services are charged at the regular rates
listed above plus $150 per whole day or portion thereof.
Consulting Engineers, Geologists
and Environmental Scientists
CXfices in Other Principal Cities
Woodward-Clyde Consultants
EQUIPMENT:
Field Inspector mobile laboratory and other vehicles used in field work $ 3.2Q/hr.
Vehicles for transportation 0.20/mi.
Refraction Seismograph 10.00/hr.
Use of WCC sampling equipment with subcontract drilling 5.00/hr.
Rates for other equipment such as seismic survey equipment, strong motion monitors,
downhole shearwave system, shearwave hammer, resistivity equipment, magnetometer,
earthquake data bank, slope indicator, area! photographic camera, acoustical equip-
ment, vibration monitoring equipment, nuclear moisture density gauge and settlement
plates will be furnished upon request.
LABORATORY TESTS:
Unit Price
Sieve Analysis (material larger than #4 sieve, without wash) $22.50
Sieve Analysis (material larger than #4 sieve, with wash) 30.00
Sieve Analysis (material smaller than #4 sieve, with wash) 22.50
Mechanical Analysis (sieve analysis on -#4 material and 3 pt hydrometer) 35.00
Hydrometer Analysis (ASTM D 4222 on -#10 material) 40.00
Lab Compaction Test (up to 4-in. diameter mold) 70.00
Lab Compaction Test (6-in. diameter mold and California 216-F) 85.00
Lab Compaction Test - 1 point 20.00
Sand Equivalent ' 25.00
Liquid Limit (LL) 17.50
Plastic Limit (PL) 17.50
Shrinkage Limit - 25.00
Specific Gravity 25.00
Moisture Determination (MC) 6.00
Moisture Content and Dry Density Determination (DD) 10.00
Unconfined Compression (UC), Undisturbed Sample 12.00
Quick Direct Shear Test 50.00
Consolidation Test - Set-up 50.00
- Per Point 20.00
Confined Compression (including 2 points) 50.00
Swell Test (2-in. diameter specimen)
Undisturbed Sample 45.00
Recompacted Sample 60.00
Expansion Test (recompacted 4-in. diameter specimen per San Diego
County Test Procedure, including laboratory compaction test) 110.00
Permeability
Undisturbed Sample 90.00
Fabricated Sample 100.00
Sample preparation, when required, reduction of data, analyses, and plotting will be
charged at personnel rates. Rates for other laboratory testing such as triaxial
compression, slow direct shear, resistance value, California Bearing Ratio, MTS
cyclic loading, corrosivity and resistivity will be furnished upon request.
OUTSIDE SERVICES:
Drilling, bulldozing, trenching and similar grading contract work in connection with
exploration on which WCC administers a subcontract will be charged at the cost rate
times 1.25.
Woodward-Clyde Consultants
Other outside services and equipment rental items will be charged at the
billing or cost rate times 1.15. Common items to which this 1.15 multiplier
applies include: equipment rental, printing and photographic work, llpner
computer time purchases (which are increased by a factor to cover computing
equipment leases), special insurance, outside consultants, travel and
transportation, subsistenance (or room and board) and long distantcommunications.
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RESOLUTION NO. ->474
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A RESOLUTION OF THE CITY COUNCIL OF THE CITY
OF CARLSBAD, CALIFORNIA, AUTHORIZING THE
TRANSFER OF FUNDS FOR CONSULTANT SERVICES F/R
CALAVERA DAM MAINTENANCE PROGRAM.
BE IT RESOLVED by the City Council of the City of/Carlsbad
as follows:
1. That the transfer of six thousand dollar's ($6,000) for
consultant services for Calavera Dam Maintenance Program from the
Reserves to the Water Professional^Servic^sis hereby authorized
and approved.
2. That Department of Fibancfe^fund Transfer No. 46 on
\ /file in said department and inqppporated by reference herein is
approved.
PASSED, APPROVED'AN!) ADOPTED at a regular meeting of the
City Council on .the , 1978 by the following
vote, to wit:
AYES:
NOES:
ABSENT:
RONALD C. PACKARD, Mayor
MA/GARET E. ADAMS, City Clerk
(SEAL)
MarchrS, 1978
MEMORANDUM
TO: City Manager
FROM: Director of Utilities & Maintenance
SUBJECT: Status of Calaveras Dam
Calaveras Dam was constructed in 1942 and is composed of a compacted
earth fill with rock skirts on both faces - a cross section of the
dam and the spillway are attached. The flooded area behind the dam
is about 26 acres with a design capacity of 550 acre feet. The width
(front to back) of the dam at the base is 260 feet. A tower is used
to drain the dam and the lowest valve is 37.5 feet from the spillway
top - another words the water can be lowered 37.5' and no more - there
will be 9 to 10 feet of water retained in the bottom. The outlet pipe
is 18" steel encased with 2" of concrete and traverses the 260' from
the tower to the outlet downstream.
The dam was inspected by the State Department of Dam Inspection on
January 27, 1977.- It is inspected annually. We were requested to
remove some brush that was growing on the dam face, but no other
corrections or recommendations were made. The brush was grubbed out
sometime during the Spring as time permitted.
The dam did spill at the spillway during the rains in January. The
lake was drained down through the outlet over a period of time and
was retained at about 7' below the spillway - nominally at an unused
capacity or a capacity for runoff of about 150 acre feet. It did spill
most recently during the past weekend rains. It is being drained once
again - a picture is attached taken at about 3 P.M. today.
The storm run-off has caused some erosion of the drain channel below the
gunite spillway. Some reconstruction of this channel may be necessary
to minimize further erosion and to prevent undercutting of the spillway
area - this spillway is 20 feet,wide gunnite over compacted soil. We
have during the past week also placed decomposed granite on the roadway
surface of the dam to restore the crown and ensure proper drainage from
the top, rather than concentrating flow to low spots which would then
tend to erode the dam face. I will contact an engineer to inspect the
spillway area and drainage channel and to recommend necessary reconstruc-
tive efforts.
We are, in my opinion, operating the dam in a prudent manner such as to
minimize storm impact on the structure and to minimize flooding downstream.
There is a two-man crew posted at the dam during heavy rainstorms, so as
to detect any unforeseen conditions which may develop so that prompt
remedial actions can be taken.
W. GTTEtR
Director of Utilities & Maintenance
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