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HomeMy WebLinkAboutMINUTES - 08122003 - C.33 TO: BOARD OF SUPERVISORS ell FROM: MAURICE M. SHIU, PUBLIC WORKS DIRECTOR DATE: August 12, 2003 SUBJECT: APPROVE and AUTHORIZE the Public Works Director, or designee, to execute a contract with Bill Wigginton, Geolex, Inc., in the amount of$129,878, to Provide monitoring and maintenance as General Manager for the Hillcrest Heights Geologic Hazard Abatement District, for the period August 1, 2003 to July 31, 2005, El Sobrante area. (District I) Project No. 7756-6X5396 SPECIFIC REQUEST(S)OR RECOMMENDATION(S)&BACKGROUND AND JUSTIFICATION I. Recommended Action: APPROVE and AUTHORIZE the Public Works Director, or designee, to execute a contract with Bill Wigginton, Geolex, Inc., in the amount of$129,878, to provide monitoring and maintenance as General Manager for the Hillcrest Heights Geologic Hazard Abatement District (GHAD), for the period August 1, 2003 to July 31, 2005, El Sobrante area. II. Fiscal Impact: There is no impact to the County General Fund. The funding source for this service is derived from revenues generated by the Hillcrest Heights Geologic Hazard Abatement District. Continued on Attachment:X SIGNATURE: _.t.,#+;ECOMMENDATION OF COUNTY ADMINIS OR _RECOMMENDATION OF BOARD COMMIT' ,PROVE OTHER SIGNATURE(S) ACTION OF BO�Q ON AUG. 12, 2003 APPROVED AS RECOMMENDED Xx OTHER VOTE OF SUPERVISORS _x UNANIMOUS(ABSENT NO NF: ) AYES: NOES: I hereby certify that this is a true and correct copy ABSENT: ABSTAIN: of an action taken and entered on the minutes of the Board of Supervisors on the date shown. MF:sr G:\GrpData\SpDist\Board Orders\2003\08-12-03 BO-Hillcrest Heights GHAD.doc Orig.Div:Public Works(Special Districts) ATTESTED: AUGUST 12, 2003 Contact: Skip Epperly(313-2253) JOHN SWEETEN,Clerk of the Board of cc: County Administrator Assessor Supervisors and County Administrator Auditor-Controller Community Development County Counsel B.Wigginton,Geolex,Inc. By ��'Deputy Contract Folder CHAD Folder&Binder SUBJECT: APPROVE and AUTHORIZE the Public Works Director, or designee, to execute a contract with Bill Wigginton, Geolex, Inc., in the amount of$129,878, to provide monitoring and maintenance as General Manager for the Hillcrest Heights Geologic Hazard Abatement District, for the period August 1, 2003 to July 31, 2005, E1 Sobrante area. (District I) Project No. 7756-6X5396 DATE: August 12, 2003 PAGE 2 III. Reasons for Recommendations and Background: Bill Wigginton at Geolox, Inc. has been providing the monitoring and maintenance of the Hillcrest Heights GRAD in the El Sobrante area for the past five years. The CHAD wishes to continue utilizing this firm for these services. IV. Consequences of Negative Action: The monitoring and maintenance of the CHAD will be negatively impacted without execution of this contract. xd CONSULTING SERVICES AGREEMENT 1, Special Conditions. These Special Conditions are incorporated below by reference. (a) Public Agency: Public Works Department (b) Consultant's Name &Address: William Wigginton,,906 Geolex � POB 374 Aptos, CA 95001 (c) Project Name, Number, & Location: Hillcrest Heights CHAD, 7756-6X5396, El Sobrante Area (d) Effective Date: August 1, 2003 (e) Payment Limit(s): $129,678.00($64,878.00 for 2003-2004 and$65,000.00 for 2004-2005) (f) Completion Date(s): July 31, 2005 2. matures.These signatures attest the parties' agreement hereto: PUBLIC AGENCY CONSULTANT By: Maurice M. Shiu �, j 1 �►+'��f�` Public Works Director/ By: Lam' Chief Engineer, or Designee (Designate official cap in the b siness. Type of Business: (sole proprietorship,government agency,partnership,corporation,etc.) If Corporation, State of] corporation: CA By. By: C !'<5 -000#AC ee,445 t `� ► (Designate official coicity in thd business. Type of Business: (sole proprietorship,t6vernment agency,partnership,corporation,etc.) Note to Consultant: For corporations,the contract must be signed by two officers.The first signature must be that of the chairman of the hoard, president, or vice-president; the second signature must be that of the secretary, assistant secretary,chief financial officer,or assistant treasurer.(Civ.Cade,Seco 1190 and Corps.Code.Sec.313.) The acknowledgment below must be signed by a Notary Public. CERTIFICATE OF ACKNOWLEDGMENT State of California } ss. County of } Can the date written below,before me,the undersign otary Public onaily appeared the person(s)signing above for Consultant, personally known to me (or proved to me o e of satisfactory evidence)to be the person(s)whose name(s) is/are subscribed to the within instrument an ]edged to me that he/she/they executed the same in his/her/their authorized capaeity(Ees), and that by N r/their sig re(s)on the instrument the person(s), or the entity upon behalf of which the person(s)acted, ex ed the instrument. WITNESS my hand and official se Dated: No ublic (Notary's Seal) CALIFORNIA ALL-PURPOSE ACKNOWLEDGMENT State of California ss. County of - On 0 IV 02M3 before me, t Q, _ Date oma and Titte of Oflicer�,.� "'lane Doe,Notary PubllC) personally appeared ,_—W .. { 1� ._.._ Names)o!sign (s) Cl personally known to me proved to me on the basis of satisfactory evidence _ w.,,t�..:.. .. to be the person whose name i LISA A.DALZIEL Commission# 1377110 subscribed to the within instrument and 6MyComm.EVkesS9p28,2W61 Notary Public - California acknowledged to me thah Islaa executed he~Contra Costa County the same in his heuthorized capacity(*t , and that bylot* .r signator on the instrument the person or the ent4 pon behalf of which the person( acted, executed the instrument. IT SS my hand a d i I sea signature of Notafy-SWII OPTIONAL Though the information below is not required by law,it may prove valuable to persons relying on the document and could prevent fraudulent removal and reattachment of this form to another document. Des t ' iton of Attached Document Title or Type o ocument: Document Date: bet of Pages:..,.. Signers)Other Than Named Above: Capacity(ies) Claimed by Signer Signer's Name: .. C7 Individual ; Top of tt:tmib here 0 Corporate Officer—Title(s): 0 Partner—El Limited F]G ral Attorneyan-Fact C. Trustee ❑ Guardian or C ervator O Other: Signe Representing:_ —� 11- Q;999 National Notary Assoolation•9350 Da Soto Ave.,P.O.Box 2402•Chatsworth,CA 91313-2402•www.nationa;notaq.org Prod.No.$907 Reorder:Cali toil-Free 1-800-B7e-6827 CONSULTING SERVICES AGREEMENT 3. Parties. Effective on the above date,the above-named Public Agency and Consultant mutually agree and promise as follows: 4. Employment,Public Agency hereby employs Consultant,and Consultant accepts such employment,to perform the professional services described herein, upon the terms and in consideration of the payments stated herein. 5. Scope of Service.Scope of service shall be as described in Exhibit A&Exhibit C,attached hereto and made a part hereof by this reference. 6. Report Disclosure Section.Any document or written report prepared hereunder by Consultant,or a subcontractor,for Public Agency shall contain, in a separate section, the numbers and dollar amounts of this contract and all sub- contracts relating to the preparation of such document or written report,provided that the payment limit specified in Sec. 1(e) exceeds $5,000. When multiple documents or written reports are the subject or products of this agreement,the disclosure section may also contain a statement indicating that the total contract amount represents compensation for multiple documents or written reports. 7. Insurance.Consultant shall, at no cost to Public Agency,obtain and maintain during the term hereof:(a)Workers' Compensation Insurance pursuant to state law; (b) Professional Liability Insurance with minimum coverage of $1.000,000.00 and a maximum deductible of $50,000,00; and (c) Comprehensive General Liability Insurance, including blanket contractual(or contractual liability)coverage,broad form property damage coverage,and coverage for owned and non-owned vehicles, with a minimum combined single limit coverage of $1 000000.00 for all damages due to bodily injury,sickness or disease,or death to any person, and damage to property, including the loss of use thereof, arising out of each accident or occurrence, and naming Public Agency, Contra Costa County Public Works Department its/their governing bodies officers and employees as additional insureds.Consultant shall promptly furnish to Public Agency certificates of insurance evidencing such coverage and requiring 30 days'written notice to Public Agency of policy lapse,cancellation or material change in coverage. 8. Payment. Public Agency shall pay Consultant for professional services performed at the rates shown in Exhibit B&D attached hereto,which include all overhead and incidental expenses,for which no additional compensation shall be allowed. Notwithstanding the foregoing, those incidental expenses specifically itemized in Exhibit S & D shall be reimbursable by Public Agency to Consultant,provided that Consultant submits copies of receipts and,if applicable, a detailed mileage log to Public Agency. In no event shall the total amount paid to Consultant exceed the payment limit(s)specified in Sec. 1(e)without prior written approval of the Public Agency.Consultant's billing statements shall be submitted at convenient intervals approved by Public Agency and shall list, for each item of services, the employee categories,hours and rates.Public Agency will pay consultant in accordance with the requirements of Civil Code Section 3320 as applicable. 9. Status.The Consultant is an independent contractor, and shall not be considered an employee of Public Agency. 10. Time for Completion.Unless the time is extended in writing by Public Agency,Consultant shall complete all services covered by this Agreement no later than the Completion Date(s)listed above. 11. Record Retention and Auditing.Except for materials and records delivered to Public Agency,Consultant shalt retain all materials and records prepared or obtained in the performance of this Agreement,including financial records,for a period of at least five years after Consultant's receipt of the final payment under this Agreement.upon request by Public Agency,at no additional charge,Consultant shall promptly make such records available to Public Agency,or to authorized representatives of the state and federal governments,at a convenient location within Contra Costa County designated by Public Agency, and without restriction or limitation on their use. 12. Documentation,Consultant shall prepare and deliver to Public Agency at no additional charge,the items described in Appendix A to document the performance of this Agreement and shall furnish to Public Agency such information as is necessary to enable Public Agency to monitor the performance of this Agreement. 13. Ownership of Documents.All materials and records of a finished nature,such as final plans,specifications,reports, and maps, prepared or obtained in the performance of this Agreement, shall be delivered to and become the property of Public Agency.All materials of a preliminary nature,such as survey notes,sketches,preliminary plans, computations and other data,prepared or obtained in the performance of this Agreement,shall be made available, upon request, to Public Agency at no additional charge and without restriction or limitation on their use. CONSULTING SERVICES AGREEMENT 14. Extra Work. Any work or services in addition to the work or services described in Exhibit A&C shall be performed by Consultant according to the rates or charges listed in Appendix B. In the event that no rate or charge is listed for a particular type of extra work,Consultant shall be paid for the extra work at a rate to be mutually agreed on prior to commencement of the extra work. In no event shall Consultant be entitled to compensation for extra work unless a written authorization or change order describing the work and payment terms has been executed by Public Agency prior to the commencement of the work. 15. Pavment Retention. Public Agency shall retain ten percent f, Q}of the monies due the Consultant as security for the fulfillment of this Agreement.After the Consultant completed all work under this Agreement,submitted final billing,and the Public Agency has found the wor a accurate,the Public Agency will pay all withheld funds.Public Agency will pay withheld funds in accords w#th the requirements of Civil Code Section 3320 as applicable. A retention will not be withheld for any"o SII°work. 16. Termination by Public Actency.At its option, Public Agency shall have the right to terminate this Agreement at any time by written notice to Consultant,whether or not Consultant is then in default.Upon such termination,Consultant shall,without delay,deliver to Public Agency all materials and records prepared or obtained in the performance of this Agreement, and shall be paid,without duplication, all amounts due for the services rendered up to the date of termination. 17. Abandonment by, Consultant. In the event the Consultant ceases performing services under this Agreement or otherwise abandons the project prior to completing all of the services described in this Agreement,Consultant shall, without delay, deliver to Public Agency all materials and records prepared or obtained in the performance of this Agreement, and shall be paid for the reasonable value of the services performed up to the time of cessation or abandonment, less a deduction for any damages or additional expenses which Public Agency incurs as a result of such cessation or abandonment. 18. Breach. In the event that Consultant falls to perform any of the services described in this Agreement or otherwise breaches this Agreement,Public Agency shall have the right to pursue all remedies provided by law or equity.Any disputes relating to the performance of this Agreement shall not be subject to non judicial arbitration.Any litigation involving this Agreement or relating to the work shall be brought in Contra Costa County, and Consultant hereby waives the removal provisions of Code of Civil Procedure Section 394. 19. Compliance with Laws. In performing this Agreement, Consultant shall comply with all applicable laws, statutes, ordinances,rules and regulations,whether federal,state,or local in origin.This includes compliance with prevailing wage rates and their payment in accordance with California Labor Code,Section 1775, 20. Assignment. This Agreement shall not be assignable or transferable in whole or in part by Consultant, whether voluntarily,by operation of law or otherwise;provided,however,that Consultant shall have the right to sub-contract that portion of the services for which Consultant does not have the facilities to perform so long as Consultant notifies Public Agency of such subcontracting prior to execution of this Agreement.Any other purported assignment,transfer or sub-contracting shall be void. 21 Subcontracting. All subcontracts exceeding $25,000 in cost shall contain all of the required provisions of this contract.Consultant will pay each subconsultant in accordance with the requirements of Civil Code Section 3321 as applicable. 22. Endorsement on Plans. Consultant shall endorse all plans, specifications, estimates, reports and other items described in Appendix A prior to delivering them to Public Agency, and where appropriate, indicate his/her registration number. 23. Patents and Copyrights. The issuance of a patent or copyright to Consultant or any other person shall not affect Public Agency's rights to the materials and records prepared or obtained in the performance of this Agreement. Public Agency reserves a license to use such materials and records without restriction or limitation, and Public Agency shall not be required to pay any additional fee or royalty for such materials or records.The license reserved by Public Agency shall continue for a period of fifty years from the date of execution of this Agreement, unless extended by operation of law or otherwise. CONSULTING SERVICES AGREEMENT 24. Indemnification. Consultant shall indemnify,defend,save,protect,and hold harmless Public Agency,its governing body,officers,employees,representatives,and agents("Indemnitees")from any and all demands, losses,claims, casts, suits, liabilities, and expenses for any damage, injury, or death (collectively "Liability") arising directly or indirectly from or connected with the services provided hereunder which is caused, or claimed or alleged to be caused, in whole or in part, by the negligence or willful misconduct of Consultant, its officers, employees, agents, contractors, subconsultants, or any persons under its direction or control and shall make good to and reimburse Indemnitees for any expenditures, including reasonable attorneys'fees and costs, the Indemnitees may make by reason of such matters and,if requested by any of the Indemnitees,shall defend any such suits at the sale cost and expense of Consultant. Consultant's obligations under this section shall exist regardless of concurrent negligence or willful misconduct on the part of the Public Agency or any other person;provided,however,that Consultant shall not be required to indemnify Indemnitees for the proportion of liability a court determines is attributable to the negligence or willful misconduct of the Public Agency, its governing body,officers, or employees. This indemnification clause shall survive the termination or expiration of this Agreement. 25, Heirs,Successors and Assigns.Except as provided otherwise in Section 20 above,this Agreement shall inure to the benefit of and bind the heirs, successors, executors, personal representatives, and assigns of the parties. 26. Public Endorsements. Consultant shall not in its capacity as a Consultant with Public Agency publicly endorse or oppose the use of any particular brand name or commercial product without the prior approval of the Public Agency's governing board. In its Public Agency Consultant capacity,Consultant shall not publicly attribute qualities or lack of qualities to a particular brand name or commercial product in the absence of a well-established and widely accepted scientific basis for such claims or without the prior approval of the Public Agency's governing board. In its Public Agency Consultant capacity,Consultant shall not participate or appear in any commercially-produced advertisements designed to promote a particular brand name or commercial product,even if Consultant is not publicly endorsing a product, as long as the Consultant's presence in the advertisement can reasonably be interpreted as an endorsement of the product by or on behalf of Public Agency. Notwithstanding the foregoing, Consultant may express its views on products to other Consultants,the Public Agency's governing board,its officers,or others who may be authorized by the Public Agency's governing board or by law to receive such views. 27. Project Personnel. In performing the services under this Agreement, Consultant shall use the personnel listed in Exhibit D, attached hereto and made a part hereof by this reference. Changes in project personnel may only be made with Public Agency's written consent, and Consultant shall notify Public Agency in writing at least thirty(30) days in advance of any proposed change. Any person proposed as a replacement shall possess training, experience and credentials comparable to those of the person being replaced. 28. Consultants must give consideration to DBE Firms as specificed in 23 CFR172 5fe) Attachments:Exhibit A,Exhibit 8,Exhibit C,and Exhibit D Form approved by County Counsel(5/00) G:\GrpData\SpDistlContractN\GeolexHillcrestGHAD2003-2005 Exhibit A A. 4n a periodic basis during each year, the GHAD will perform the following: 1. Monitoring and maintenance of the following items: a) Interceptor Ditches b) Piezometers and hydraugers c) Survey points and benchmarks d) Subdrains 2. Mitigation measures, including the following items: a) Sandbagging b) Hydroseeding 3. Cather items included within is the Plan of Control (Exhibit C) S. During each year, the GHAD will perform repair and improvement projects as and when necessary, within budgetary limits. Exhibit B Projected Revenue Assessment $ 983 per unit per year x 66 units (2003/2004)= $ 64,878 $1,006 per unit per year x 65 units (200412005)w $ 65,000 Projected Expenses Estimated Estimated 2003/2004 2004/2005 General Manager/Geologist ($150 per hour) $ 9,000 * $ 9,000 Support Services (Consultants) $ 7,500 * $ 7,500 Repair, Maintenance (see Appendix C) $ 20,200 * $20,700 Improvement Program — Cleaning $ 15,000* $ 5,000* and capping subdrains SUBTOTAL $ 51,700 * $ 42,2130* Legal, Accounting and Insurance $ 8,000 $ 8,000 County Staff Services $ 0 $ 0 Reserve for contingencies $ 5,178 $ 14,800 TOTAL. NOT TO EXCEED $ 64,878 $ 65,000 * - These are payment limits for which the District Manager has authority to pay. The Support Services and the Maintenance Contractors are paid by the Contra Costa County based on District Manager and the Contra Costa County's approval. n Exhibit C "ILLCIt-]E T BEI HT UBD. ION 7582 GEOLOGIC HAZARD ABATEMENT DISTRICT (GRAD) PLAN OF CONTROL MONITORING & hUINTENANCL AlANUAL c> / t� $ TABLE OF CONTENTS Hillcrest Heights, Subdivision 7582 GHAD, Plan of Control Letter of Transmittal Recital 1 GHAD (Description) 2 Description of Landslide Hazard 2 Other Potential Geotechnical/Geologic Hazards 3 Exclusion of Isolated Problems on a Single Lot 4 PLAN OF CONTROL A. Authority and Scope 5 B. Criteria for inclusion or Exclusion 5 C. Funding 6 D. Description of Geologic Hazards and Repair 7 E. Definitions 9 F. Plan for Prevention, Mitigation, Abatement, or Control 9 G. Geotechnical Techniques for Mitigation 9 H. Operation and Maintenance Procedures 10 I. Monitoring Frequency 13 J. Annual Report i3 K. Initial Start-up Period 14 L. Future Modifications of Plan of Control 14 FIGURES 1. Vicinity Map 2. Site Map 3. Rough Grading Plan 4. Schematic of Remedial Grading 5. Eastern Landslide Repair Cross-section 6. Western Landslide Repair Cross-section 7. Subdrain Detail 8. Preliminary Remedial Grading Plan 9. B-58 Concrete Lined Ditch 14. J Concrete Lined Ditch GEOLOGIC AND SOILS MAP (Pre-Construction by Harlan Tait for EIR) BIBLIOGRAPHY Hl"LLCREST HEIGHTS SUBDIVISION 7582 GEOLOGIC HAZARD ABATEhWI TT DISTRICT GHAD Plan of Control and Monitoring and Maintenance Manual RECITAL The proposed project,Hillcrest Heights,is an R-6 single-family residential detached development. (six units per acre) consisting of 66 lots on 17.5-± acres. The subdvision.is located within the unincorporated El Sobrante.area of Contra Costa County on a north facing hillside of the San Pablo Ridge (see Figures 1 & 2). Two open space parcels within the subdivision are the 2.65 acre Parcel B and 0.13 acre Parcel A. These parcels lie outside of individual lot boundaries, and are to be under the ownership of the Hillcrest Heights Homeowners Association (HOA)together with the HOA maintained private streets. The project EIR recognized that a potential significant geologic hazard exists for this development in the form of landslides. "elides on site need to be properly evaluated as to their hazard potential to site. Sites near Hayward fault and its or any other nearby faults effects need . to be evaluate(." Also since the site will be heavily graded this was considered a significant environmental impact and "the effect on this on underground water needs to be investigated". These issues raised in the EIR. were addressed in the geotechnical reports by Alan Kropp and Associates (AKA 1988,1991,1995) and a geologic report by Darwin Myers Associates (1988). Other relevant publications used in preparation of this report are in the Bibliography in the Appendix. AKA came to the conclusion that'"the site is suitable for the proposed development." This was with the provision that the conclusions and recommendations contained in their reports were followed. Corrective work to stabilize landslide materials is defined in these reports. Darwin Myers (1988) in his geologic report recognized the potential landslide hazard and stated " a network of subdrains, in combination with--an efficient surface drainage system will be critical to stabilize the site." The County in its Conditions of Approval (6/13/93) for the Hillcrest Heights Subdivision, recognizing a need for post-construction maintenance of surface and subsurface drainage facilities, called for in Condition 21 (J). "A Geologic Hazard Abatement District (GHAT)) or functional equivalent shall be developed to monitor and maintain the slope stability measures (e.g., subdrains) for this development." The Conditions of Approval place a requirement for an annual inspection report to be filed with the County by "a licensed Geotechnical Engineer." The intent of the Condition of Approval xy GS Y �i s tt� LLI � p ur vutoop tt5 t xzi . w z 4O"R 0 0 v�b z f3� G ✓ter � " 4a 0 r � OD % l to fi �•*•..� ft1 t N r 10 o '" cck r' rains, breaks in water lines, or other severe environmental conditions. For this reason the G1 AD is responsible to make slope repairs that affect more than one property owner within the district. OTHER POTENTIAL GEOTLCHI\TICAL/GEOLOGIC HAZARDS Reside landsliding, several other geotechnical and/or geologic hazards are described for this project, including. 1. Erosion and sedimentation 2. Expansive soils and bedrock 3. Creep of slopes 4. Earthquake hazards such as ground shaking 5. Potential flooding It is not the purpose of the Geologic Hazard Abatement District to take care of all potential soil and geologic problems or concerns within the project site. potential landsliding is the primary hazard for which the district serves as the mitigation measure. Rapid removal of surface water resulting from precipitation by means of concrete lined ditches and storm drain facilities prevents waterinfiltration into the subsurface and weakening of slope materials. 'Therefore proper operation of the concrete lined ditches, storm drains and detention pond is considered a long- term maintenance function suitable for the district. The surface ditches which total approximately 4,000 feet of aggregate length drain into a permanent stormdrain system. A sediment detention basin six feet deep and 60 by 100 foot in dimension is also present on-site. An.erosion control plan is required for this project and details for post-construction maintenance should be given in this document. The geotechnical report (AICA 1995) states that the surficial clay soils and landslide debris are moderately to highly expansive and can undergo significant volume changes when shrinking and swelling. finis can cause damage to homes, pavements, garage slabs, etc. Design mitigation will include the use of drilled pier and grade beam foundations for homes. In the EIR the authors also recognize the likelihood that the bedrock can also exhibit expansive (swelling) characteristics. The Hillcrest Heights Geologic Hazard Abatement District is not formed to undertake repairs resulting from the shrink-swell phenomena unless it directly effects the integrity and functioning of the drainage facilities for which it is responsible. Soil creep is.differentiated from landsliding in that landslides have a distinct surface of sliding (slip plane), and creep does not. Creep may, however, in some cases be a precursor of landsliding. The rate of movement for creep is in fractions of an inch per year whereas landsliding occurs in inches or feet per day, month, or year. AKA(1995) state that "the surface soils tend to lose strength after prolonged rains, and when they are located on moderate slopes they have a tendency to creep". The mitigation measure chosen, given that the proposed homes are to be constructed on sloping terrain, is to design the foundation elements to resist the anticipated creep forces near the ground surface. The Hillcrest Heights CHAD is not firmed 3 ' k to undertake repairs resulting from the soil creep phenomena, unless it directly effects the integrity and functioning of the drainage facilities for which it is responsible. AKA is expected to place at least four slope inclinometers into the subsurface and periodic readings will be made by the District to record the depth and amount of any ground.movement with time at the chosen installation sites. The Hillcrest Heights Subdivision is located approximately 0.7 to 1 mile northeast of the nearest strands of the active Hayward fault. The assumption is made (AICA, 1995) that the site will be subjected to at least one moderate to severe earthquake during the next 30 to 50 years. The likelihood of fault offset at the site is considered remote,however, ground shaking would occur. A secondary effect of earthquakes is seismically induced landsliding. The EIR authors under mitigation measure 4.2-1(g) recognize this possibility and call. for: "A stability analysis of both existing and reconstructed project area slopes should be performed. Project area slopes should have a factor of safety greater than one under the effects of the design earthquake, ag ing maximum pgssible growndwater levels during the life f the project" (underline added for emphasis in this document). A stability analysis (static and pseudostatic) was prepared by AKA. The maximum allowable Level of groundwater is to be defined. Currently the stability analyses are based on an assumption that groundwater would remain below the repaired material at the base of the compacted fill. The CHAD monitoring responsibility is to assure that the ground water level in the subdrained areas does not rise above the maximum possible groundwater level as'determined by the project design. Personnel retained by Hillcrest Heights GHAD are used to inspect surface drainage facilities, concrete lined ditches, the inlets, subsurface storm drains, and the sediment detention basin. The Hillcrest Heights GRAD is not formed to undertake repair of earthquake damage unless it directly effects the integrity and functioning of the drainage facilities for which it is responsible. EXCLUSION OF ISOLATED PROBLEMS ON A SINGLE,LOT The Hillcrest Heights Geologic Hazard Abatement District(GHAD) is not intended to treat landsliding or adverse erosion damage confined within a single lot boundary. If, however, a hazardous landslide or erasion condition encroaches from a lot into the open space (Parcels A or B) or crosses a property line, or threatens in the judgement of the District more than one property the District should act to mitigate the damage. 4 HII.LLCREST HEIGHTS CHAD PLAN OF CONTROL Maintenance and Monitoring Manual EXHIBIT C A. Authority and Scone Under authority of the California Public Resources Cade(Division 17, commencing with Section 26500) the County of Centra. Costa wishes to establish the Hzllerest Heights Geologic Hazard Abatement District (CHAD) in the El Sobrante area. Development of the Plan of Control by a state licensed Certified Engineering Geologist is a requirement for formation of a CHAD. The potential for long-term landslide and erosion are known to exist and this plan document provides a plan for their prevention, mitigation, abatement, or control. B. r n lu i n or EXclUsi Exclusions 1. Landslide or erosion damage within a single lot which does not pose a clear cut hazard to public health, safety and welfare. 2. Maintenance of privately maintained right of ways other than the EVA. 3. Property or lot which lies completely outside the GHAT) boundary in which the landslide or erosion problem does not encroach or directly affect the improved lands within the district. 4. Surface concrete lined drainage ditches or homeowner installed subdrains that traverse only one lot. C. Funding The GRAD District will be funded from the assessment of each lot within the GHAD boundaries. The tax assessment would commence upon the filing of the Final Subdivision Map. The owner of each lot which includes the developer would pay the full assessment whether or not a residence is constructed on the lot. a. Single Family Unit(lot size up to 1 acre )....$-;$75--per Year*(approximate) * Based on 1996 estimate. Automatic escalation according to US Dept. of Labor, Bureau of Labor Statistics, Consumer Price Index. Open space and undeveloped land within the district will not be assessed. Streets, the detention basin, and any lands held in common by the homeowners association will not be assessed. The project is anticipated to be graded in 1996 and lot sales would commence in 1997. For the first year after grading the contractor is normally responsible for any defects or problems with drainage installations. The developer is expected within the three year buildout period to handle any minor landslide or erosion problems. It is therefore expected that a reserve can be established in the first three years on the order of$60,000. The reserve should only be tapped to repair shallow landslides or adverse erosion within the district areas of responsibility, to maintain ditches, or repair damaged pipes for which the district is responsible. 6 F � D. Description of Geologic Hoards and Repair The site is on "a northwest facing slope that contains two swales. Elevations on the property range from 340 feet near the southeast corner of the site to elevations of about 120 feet near the northwest comer of the site. Natural slopes at the site are at inclinations of 2:1 (horizontal to vertical) to 5:1 over broad areas "(AKA, 1995). The average slope is slightly steeper than 5:1, ie 22°x. The majority of the site appears hummocky suggesting soil creep or shallow soil slippage (AKA, 1995). Beneath a soil cover of colluvium, landslide deposits, existing fill, or terrace deposits is the bedrock of the Pliocene Contra Costa Group C'fce). This unit consists chiefly of a weakly lithified nonmarine claystone, siltstone, sandstone, and pebble conglomerate. 'Where exposed bedrock dips of approximately 35 to 40 degrees to the southwest. For more detail on site geology refer to the geologic reports referenced in the Bibliography. Harding Lawson and Associates (lU A, 1988) prepared the first site specific geologic map and outlined two significant large landslide deposits (15 to 20 foot thick) on-site which have become identified as the eastern slide and western slide. A smaller on-site active slide(northeastern slide) is also mapped. The Hillcrest Heights Subdivision 7582 Grading Plan was prepared by Wollman Associates and is .included as Figure 3. A major portion of the site is to be graded with approximately a balanced 100,000 cubic yards of cut and fill. Slope repairs could take an additional 110,000 cubic yards (Simonitch, 1992) Depth of cut is up to 26 feet and thickness of fill can be up to 32 feet. The corrective work solution for the existing landslides by the project geotechnical consultant AKA is to remove the landslide material. onsite. "Corrective work should include the construction of a keyway at the downslope boundary of the work, construction of benches in the slope where.material is to be placed, installation of subsurface drainage systems, placement and compaction of the materials onto the preps slope, and construction of surface drainage features" (AKA,1995), see Fig. 4. 'Two idealized cross-sections are presented in Figures 5 and 6 that show the regrading concept. They illustrate replacement of landslide debris with compacted engineered fill. Figure 7 shows the detail of the subsurface drainage.installations at the base of a subexcavated slope. During site grading some temporary shoring work will be necessary along the southern property line to prevent upslope buildings from being adversely affected by excavations necessary for the slope reconstruction work. Darwin Meyers (1988) in his report for the landslides on-site recognized that"a network of subdrains, in combination with an efficient surface drainage system will be a critically important component of any plans to stabilize the site" (DMA, 1988). The primary function of the Hillcrest Heights CHAD is to provide the post-construction long-term maintenance and monitoring of the subdrainage, surface drainage, and buried storm drainage systems. Provided the drainage systems perform as designed the landslide hazard is prevented, mitigated, or controlled. 7 �� t .�' ' � � . ., },� +..�' i ` �,t.` �Wiz. -,."`*'��' �\.�, M1r�'� ....r ^' �,�, �� f ,r� � ry moi. � i r �� . � �� r B }. r`y .l Y,. � t ]' .�.; �j :��� � �. i I t"�. * � �~ -`� ° � .. �' n f ,,�* ,^.rte rP. t a«t♦ �- J �. } 'y,..4^' u �' 4 `i T l T* _�Kh 3 .i-: -,�bC�.'�'* i�.•et.:d� ..ih.. r.•w� .. ,� 3.,w. t � i: � ' X J T ."'``� w 1... "r<•-- s .....a. "�_�ts'fiw-3i..�.. .,.+ �';'. C en o o a _ 0 *4 a� " I 40 ` w 'go\ � v a x in _ me M � M to 0 Z c o. L (� ow � i o- r* to O Y .a N V + � d m 45c� ui a J t c� 7 ca cs C a CD O C3 .er. . tg % l ti. tm r dUA 1� 70 ce r CL. It Q� v G W r CL y m Q � G% •� �����tiC)11.. geotextile overlapped '/�-Inch, clean, open graded drainrock; wrapped in an approved non-woven polyester geotextlle - .•: J Wit••./• iS 61 .6-Inch rigid, perforated, plastic pipe, placed with Dotes down, on maximum 6 Inches of bedding, - ; �a o ,,;. �+ ,• f, sloping 2% minimum to solid pipe system {joints glued where sloping>3.1). Provide g°':.; •i cleanouts at 'high` ends `w• . � a AS PER A. KROPP & ASSOCIATES ELT.S. SUBDRAIN DETAIL. nom No. C a E=- <=> L_.. E=- X SLMONISM 7582 7 EL SOBRANTI-, CALFORNA .L W1G0x1N_T0N PROSECT HO. 95117 DATE A11.5,10A av xirn,ar a Subdrainage System Figure 8 illustrates the current concept of the subdrainage system envisioned currently by the project geotechnical consultant. Approximately 12,000 feet of piped subdrains are anticipated by AKA ( see remedial grading plans dated Jan. 1996). It is expected that the project geotechnical engineer will ultimately determine the extent and layout of the subdrains in the field during grading. It is recommended by AKA that the project surveyor locate all subsurface drains, solid pipes, and cleanouts on an AS-BUILT DRAWING OF REPAIR AREAS. These drawings are definitely needed by the Hillcrest Heights CHAD to assist the district in locating the pipes in the future.should any repair work be necessary. Clean-outs for the subsurface drains are to be provided at the upslope boundary of each subdrainage pipe and at intervals of no more than 100 feet for solid discharge pipe. Additionally a cleanout should be provided at each 90 degree elbow. The collected water is taken to a suitable "appropriate discharge facility". Concrete Lined SurfaQe Drainage Ditches Current grading plans show an aggregate length of 4,000 feet of concrete lined ditches of the County B-58 and/or J design (see Figs. 9 & 10). B-58 ditches are typically placed on a 8 foot width drainage terrace (see detail). AKA has called for no surface.water being allowed to flow over the top of cut or fill, slopes. Drainage berms or interceptor ditches should be provided to prevent surface water from flowing over the slopes. Drainage terraces on the surface of cut or fill slopes should be provided with paved "V" ditches (in accordance with Contra Costa County specifications for a B-58ditch). AKA calls for the use of reinforcing bars rather than wire mesh in the concrete lining of the ditches. The ditches are to slope at a gradient of at least 5%. Collected water is to be carried in solid pipe to an "appropriate discharge location": A cleanout should be installed at the "high'" end of the solid pipe and at 100-foot intervals along the length of the solid pipe. The project surveyor should survey in and place the location of this solid pipe on the As-built drawing of the repair areas. Project Improvement Plans,should designate the discharge storm drain facilities that the Hillcrest Heights GRAD is not responsible to maintain. The EIR describes that a LEGAL ENTITY" ( which is in this case is the Hillcrest Heights Geologic Hazard Abatement District) should be established to fund the needed maintenance of concrete lined ditches, inlets or drainage pipes located on slope benches or along rear lot lines in accordance with Division 914 of Title 9, Subdivision Ordinance. All drainage facilities that drain more than one lot before entering the storm drain system. would be maintained by the district. Drainage facilities that drain more than one lot located within lot boundaries need to have specified easements to permit the district to enter to perform the needed maintenance. Early implementation of the district is facilitated by developer funding in the form of assessment on improved lots before homeowner occupancy. This together with the periodic inspection called 8 7` 32* 3' min. WS 3' min. 12' v; ,ham 6' Lip -can uphill side r � 3' �miin. 6x6x10 Ga. mesh* NOTE. Use rebvr, see 12' min. comment below C.C. CO. STD. B-58 DITCH Lined surface ditch, sloping 5% minimum to suitable discharge facilities. Lined ditches should be reinforced with reinforcing bars. (not wire mesh) and have score joints spaced appropriately. 8 feet minimum % minimum DRAINAGE TERRACE DETAIL KT.S. B-58CONCRETE LINE DITCH DETAIL AND DRAINAGE TERRACE rWWK ko. L._ E—= X SUBOMSION 7682 ttv c F c t p. f` 1 EL SCERANTF, CALIFURNA V+1.B. W100INTON PROJECT NO. 95117 DATE 4/15196 RY WRW k E i t X`' � ` cI S LO PG ONI ALL 3 E E t TYPICAL. `J` CONCRETE LINED DITCH ncURE No. L Ev X SUBDMSION 7582 1�J �r�tcCa t��Rsa.'r r� EL SOBRAt� CALFOFMA W.E3. WI(:.GINT0N Sao tc xo. )5#17 oars 4/15/86 9Y WBW for in this manual should provide adequate "proof that periodic maintenance" will be done. The maintenance should reduce the impact of long-term erasion and sedimentation on-site. Required monitoring should determine that the groundwater levels are maintained below a critical level where slope stability could be,jeopardized. B. pg initi n LANDS IIlr1B - is defined as a deposit of soil and/or rock moving downward from its original position under the influence of gravity. Slides are mass movements of earth materials, primarily intact, which occur along discrete shear surfaces. These surfaces (shear or slip planes) can be rotational such as for earth stumps, or planar as for translational earth slides or block glides. Flows are mass movements of earth materials in which the type of movement is one of flowing. When composed of soil finer than gravel size, the flowing material is commonly called a mudflow. When the material flows downslope with speed the mass movement is called a debris flow or avalanche. MOSIDN - is defined as the process by which, earth materials are loosened and removed by running water on the surface or in the subsurface. Sedirne ntation is the depositing or settling of soil or rock particles from a state of suspension in a liquid. T. Pign fQr PrP,van i i ti n A atement r on fExi tin r o anti Landslid and Erosion Hazards The district will retain'a professional registered geotechnical/civil engineer and/or a certified engineering geologist to identify potential landslide and erosion. hazards. The professional consultant or consultants or their staff shall monitor existing or potential. slide and erasion hazards and take action if authorized by the GHAD Board of Directors to repair or stabilize slides; and to mitigate,abate, or control the effects of sliding. The erosion hazard and adverse sedimentation effects are also to be monitored, mitigated and controlled. The ongoing annual maintenance is to be limited to that designated in the annual budget. G. technical TechniQue._s for Midgation o LMdslide and Er _ionds If a hazardous landslide or erasion condition affects more than a single property, one of which is within District boundaries, or threatens in the judgement of the District more than one; property, the Flan of Control is to be followed to mitigate the damage. This can include but may not be limited to: a. removal of the geologic hazard. 9 b. stabilization (either partial or total) of landslide by removal and replacement with compacted drained fill. C. construction of structures to retain or divert slide material: or sediment. d. construction of erosion control devices such as gabions, riprap, gotextiles, or lined ditches. e. placement of drained engineered buttress fill. L placement of subsurface drainage devices; e.g. underdrains, or horizontal drilled drains. g. slope correction (i.e. gradient change, biotechnical stabilization, slope trimming or contouring). h. construction of additional surface ditches and/or detention basins, silt fences, sediment traps, backfill or erosion channels. Potential landslide and erosion hazards can best be mitigated by controlling soil saturation and water runoff by maintaining the surface and subsurface drainage system. Operation and maintenance procedures for district operation are given along with a proposed monitoring schedule in the following sections. H. ra ion and Mai:n�enance pr c uses Once formed the Hillcrest Heights Geologic Hazard Abatement District through its retained . professional consultant, would be responsible for implementation of the monitoring and maintenance program. The Consultant retained-by the District could either be a Registered Geotechnical/Civil:.Engineer or Certified Engineering Geologist with experience in landslides and erosion and capable of maintaining civil engineering works. The administration required is limited and can be done by the subcontracted private consultant. Funding initially is from assessment of the lots (primarily developer's money in the beginning) and as the lots are sold the individual homeowners tax assessment would fund the district's annual. budget. Concrete Lined Ditches The retained professional consultant and/or the consultant's designated representative would make the recommended periodic inspections (see next section for monitoring frequency). This 10 to placement of inclinometers behind and upslope of these structures to monitor the slope along the property line during grading. Provided the sharing materials are durable materials it is appropriate to leave this shoring material in-place rather than pulling the shoring out as fill: is placed. This would be up to the project geotechnical consultant to determine. If the inclinometer casings upslope of the temporary sharing wall are left in place and are accessible, these installations should be integrated into the CHAD monitoring network. &Wring Nall Subdrainage Some proposed retaining walls cross a number of property lines or are in open space. These most likely would have a subdrainage system.planned behind as wall and possibly a concrete lined ditch running behind the top of wall. The grading plan calls for criblock walls which are concrete crib type structures. If a retaining wall is confined to one lot it is the responsibility of the homeowner. If a wall, has a subdrain which crosses a number of lots or is in open space, it is the district's responsibility to maintain the wall and to keep the drain functioning. Adequate drainage may be provided by a subdrain system consisting of 4-inch rigid perforated pipe bedded in 1/4-inch clean, open-graded rock. The entire rock/pipe unit should be wrapped in an approved non-woven, polyester geotextile. The rock and fabric placed behind the wall should be at Ieast one font in width and should extend to within one.foot of finished grade. The upper one foot of backfill should consist of on-site, compacted, relatively impervious soils(an impermeable plug). We should note that flexible, perforated pipe(flexbe), 2000-Pound Mush, L,eachfteld, and ASTM FS 10 pipe are not acceptable for use in the subdrain because of the likelihood of damage to the pipe during installation and the difficulty of future cleaning with mechanical equipment without damaging the pipe. We.recommend the use of Schedule 40 PVC, SDR 35 PVC or ABS, Contech A-2000 PVC drainpipe, or equivalent for the drain system. The subdrain pipe should be connected to a system of closed pipes(non-perforated) that lead to suitable discharge facilities. At.the location where the perforated subdrain pipe connects with the solid discharge drainpipe, drainrock backfill should be discontinued. A"clay plug" should be constructed out of relatively impervious soils to direct and collected water into the perforated pipe and minimize the potential of water collecting around the solid drainpipe and saturating the adjacent sails. In addition, the "high" end and all 90 degree bends of the subdrain pipe should be connected to a riser which extends to the surface and acts as a cleanout. The number of cleanouts can be reduced by installing "sweep" 90-degree bends or pairs of 45-degree beads in succession instead of using "tight" 90-degree bends. "Sweep" 90-degree bends are similar to those used in sanitary sewer pipe connections. .Dined surface ditches should be provided behind any walls that will have an exposed sloping surface steeper than 4:1 behind thefn. These ditches, which will collect runofl`water from the slopes, should be sloped to drain to suitable discharge facilities. The trip of the walls should extend at least one foot above the ditch(one foot of freeboard). 12 f , Deflection or Impact Structure The EIR authors as a mitigation measure discuss the need of impact and deflection structures below the Parcel B at the rear of Lots 35 and 36. Current grading plans show upslope retaining walls behind Lots 38,39, and 40. An Emergency Vehicle Access Road and concrete lined ditches are present on this slope upslope of the lots. The possibility of a debris flow is the reason for the need of deflection or impact structures to protect downhill lots. If the graded slope is steeper than 3:1 the possibility of more rapid debris flow movements is increased. The potentialbuildup of slide debris against the upslope side of the wall as well as possible encroachment of slide debris on the uphill ditches or EVA should be checked after heavy storms. 1. Monitoring Frequency SURFACE(B-58/J)DITCHES and solid pipe outfalls....................................Semi-annually SUBSURFACEDR.AINS in LandslideRepair Areas......................................Semi-ennually SUBSURFACE DRAINS behind Common Retaining Walls...........................Annually SLOPE INDICATORS..........................................................................5years* *first set after one year and then every 5 Years. DEBRIS ORIMPACTWALL......................................................................Annually As a minimum two permanent piezometers should be placed by the Project Geotechnical Consultant, one in the Eastern and one in the Western Landslide Repairs. 'Preferably these should be placed in proximity to the two inclinometers in readily.accessible locations. Initial readings of ground water level should be taken after completion of grading. and then Red Flag Levels should be established by the project geotechnical engineer. At Red Flag Level 1 a Licensed Geotechnical Engineer should be consulted to determine what if any remedial measures should be undertaken. At Red Flag Level 2 the district should take some action to lower the ground water such as by pumping or installing horizontal drains. Monitoring frequency should be increased should a Red Flag water level be reached. Inclinometers 'should be placed in grouted holes. If in excess of 2 inches of movement takes place or if the rate of movement is in excess of 1 inch per year, monitoring frequency should be increased and a Licensed Geotechnical Engineer consulted as to the significance of these measurements. For annual inspections, the timing should preferably be in the spring, following the end of winter rainfall. For semi-annual monitoring, the inspection should include a fall pre-winter storm inspection and one in the spring following winter rains. For major (once every 5 year type) storms that occur subsequent to 10 inches of rainfall within one winter season, a storm damage check of the site would be appropriate by a district representative. J. Annual RepQrl An Annual Report shall be prepared by the Professional Registered or Certified Consultant 13 retained to administer the District. The scope of the work in preparation of the annual report would be to: a.) Prepare annual assessment roll. b.) .Prepare a Quarterly financial report. c.) Coordinate with the Hillcrest Heights Homeowners Association President or appropriate Board Member so as to obtain maintenance plans of the association. d.) Review monthly expense records for district. e.) Calculate the level of taxation for the coming year. The Annual Report and proposed budget for the Fiscal Year is to be submitted to the County Board of Supervisors. K. Initial Startup Period The project is anticipated to be graded in 1995 and lot sales would commence in 1997. It is expected that all lets would be sold in 3 years. The tax assessment would commence after the filing of the Final Subdivision Map. The owner of each lot would pay the full assessment whether or not a home is constructed on the lot. For the first year after grading the contractor is normally responsible for any defects or problems with the drainage installations. The developer is expected to handle any minor landslide problems during the 3 year buildout. The first three years should permit a buildup of a reserve. Assuming an assessment per unit(lot) of approximately$875 per year the annual initial budget is'on the order of$57,750. Provided that $20,000 goes to a Reserve, $37,750 is the first year budget for administration and normal maintenance. This is in 1996 dollars and a 6% inflation rate can be assumed for subsequent years. After 3 years a reserve of $60,000 could be established. The reserve should only be used to repair shallow landslides or adverse erosion within the areas of district responsibility, to replace ditches, or repair damaged pipes for which the district is responsible. L. Future Modifications of Plan Of Control This document is to be considered as the initial Plan of Control to serve as a guide for the operation of the district. With time it may become necessary to update or expand this plan to meet changed conditions present at some point in the future. The current document was prepared based on available information from the project consultants (see Bibliography). No independent study of the site conditions was made by William B. Wigginton, CBCT or GEOLEX Inc. and the document was prepared for the sole use of the client Eugene Lee and the Hillcrest .Heights CHAD. 14 v .q.• „ aW%.ad «TXS;+eO++w+,aY.w4H:4awr ..� t y y �� �f• ( CeA v `v„ j wr.,.s aaer.cn........,..:.......wwt,nr:. 1,\( rarao w,c rraA..u._so+e •�' !' +«c •Y^"W� ts-a i.o. anma na.asw« . .,, i i 1' r+w` ,%` •r..+«.w ".� v. < at. v:.awa sRraxr LSGENC F.{'41 BSC >,aresw erNn,rM..u.r...Mr �,a tAK azo+.Mzufi w.a«.�<t+wMz Lha �,y„a■ -}E'L Xr},n+, �. 6ie� 6YYe<mNRswtlYWiw rfwRw Vis.. C ''t ' ✓ }� ` >�t- / ..• ., i '~ .,. �'w.s.. t f.' T •� ./...-eon O.rwe<tM sr.Mvneta lk 4 � � t ibwr4Nr �M _ zlf"4 � 1o.ry Fw � LY�.wW(rMr r a r cEo ooczc Am Sons MAP 3 BIBLIOGRAPHY 1. Alan Kropp and Associates, 5/21/91, Geotechnical Evaluation Update (Appendix C of 4/28/95 report). 2. Alan Kropp and Associates, 4/28/95, Geotechnical Investigation, Hillcrest Heights. 3. Alan Kropp and Associates, 1/19/96, Supplemental Geotechnical Analysis, Hillcrest Heights. 4. Alan Kropp and Associates, 3/20/96, Response to 3rd Party Review, Hillcrest Heights. 5. Contra Costa County, 10/92, Draft Enviornmental Impact Report, Hillcrest Heights. 6. Contra Costa County, 3/93, Response to Comments on EIR. 7. Margason, E. M., 1984, Landslide Repair in Orinda Claystone Utilizing Geogrid Reinforcement, International Symposium of Landslides, ISSMPE, Toronto, Volume 1 (Hillcrest Road Slide Repair). 8. McCutcheon, Doyle, Brown and Enerson, 1996, Draft Articles of Incorporation and CC&R's, Hillcrest HOA: 9. Dyers, Darwin, 11/15/88, Subsurface Investigation, Hillcrest Heights. 10. Wollman Associates, 9/94, Grading Plan, Hillcrest Heights. 11. Wollman Associates, 2/96, Improvement Plans, Hillcrest heights. 12. Wollman Associates, 1/961, Preliminary Remedial Grading Plan, Hillcrest Heights. Exhibit D FEE SCHEDULE Professional Services William Wigginton -- principal Engineering Geologist $ 150 / hour Depositions, Mediation and Court Appearances $ 750 Y2 day $ 1,500 full day Expenses Hourly rates include all direct costs for photocopies, reproductions, postage, courier services, facsimiles and telephones. Travel Hourly rates include all direct costs for personal safety gear, cellular telephone and travel expenses. The rates shall also apply to travel time to and from site. Auto mileage charged at applicable County rate. Invoice Invoice Monthly