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Home My WebLink About9 Geotechnical Testing Agenda Item # 9 Public Utility District ACTION To: Board of Directors From: Neil Kaufman Date: March 17, 2010 Subject: Consideration of the Award of a Contract to Perform Geotechnical Testing Services for the 2010 Construction Season 1. WHY THIS MATTER IS BEFORE THE BOARD Board action is required for expenditures in excess of$15,000. 2. HISTORY Geotechnical Testing involves testing of materials such as soil, asphalt and concrete associated with the District's construction projects. The District has a need for such testing associated with its construction projects and District personnel are not trained nor equipped to perform the necessary testing work. In February 2009, the District issued a Request for Proposals (RFP) for Geotechnical Testing Services associated with the 2009 construction projects. Twelve proposals were received in response to the RFP. After reviewing the proposals, the Board awarded a contract to Holdredge & Kull (H&K) for geotechnical testing. The work performed by H&K in 2009 was satisfactory. 3. NEW INFORMATION The District requires similar geotechnical testing services for the planned 2010 construction projects. At the District's request, H&K submitted the attached proposal to perform the necessary testing services. The proposed cost for this work is $801256.00. 4. FISCAL IMPACT Geotechnical testing is paid on an hourly basis and the hourly cost is allocated to the project on which the work is performed. The pipeline related work is paid from Water Department 2006 COP funds. The substation work is funded from Electric Department rates. The anticipated funding sources are: Funding Source Amount Water Department 2006 COP $76,752 Electric Department Rates $3,504 Total $80,256 Sufficient funds exist in both these sources to cover the cost of this additional work. 5. RECOMMENDATION 1) Authorize a Task Order to the contract with Holdredge & Kull for geotechnical testing services in an amount not to exceed $80,256.00. 2) Authorize the transfer of monies from the 2006 COP funds to the Water Department General Fund and from Electric Department Rates to the Water Department General Fund to cover the cost of the contract. Michael D. Holley General Manager/ Water Utility Manager [MHOLDRE (H & KULL CONSULTING ENGINEERS • GEOLOGISTS Proposal No. PT10019 March 9, 2010 Truckee Donner Public Utility District 11570 Donner Pass Road P.O. Box 309 Truckee, California 96160-3896 Attention: Neil Kaufman, P.E. Reference: District Pipeline Replacement—2010— Contract A and 2010 Tahoe Donner Substation Rebuild Project Truckee Donner Public Utility District Truckee, California Subject: Proposal for Earthwork Observation and Materials Testing This letter presents our proposal to provide earthwork observation and materials testing services for the proposed Truckee Donner Public Utility District (TDPUD) District Pipeline Replacement — 2010 — Contract "A" project in Truckee, California. The project will involve replacement of approximately 10,000 lineal feet of water line within the existing Tahoe Donner residential community. Additionally, our proposal includes providing materials testing and special inspection during earthwork and foundation construction for the Tahoe Donner Sub-Station Rebuild project. Construction is planned to start May 3, 2010 for the Pipeline Replacement project. The purpose of our earthwork observation and materials testing services will be to provide the TDPUD and the Town of Truckee with field data and information to assess compliance with the project plans and specifications. Included in this proposal is a brief summary of our understanding of the project, the scope of services we can provide, and an estimate of our fees. Holdrege & Kull provided testing and observation services to TDPUD for similar work last year. PROJECT DESCRIPTION This proposal is based on review of "District Pipeline Replacement — 2010 — Contract A" plans and specifications prepared by TDPUD dated January 2010 and Addendum No. 1, and our previous experience with similar projects in the (530) 587-5156 • FAX (530) 587-5196 • E-mail:handk ark HandK.net 10775 Pioneer Trail,Suite 213 Truckee,CA 96161 • A California Corporation Pm posal Na.PT10019 Proposal for Earthwork Observation and TestW 7DPUD 2010 PmpM March 9,2010 —Paw 2 project area. We understand that the proposed project will involve replacement of existing water lines with approximately 2,100 feet of 4 to 1 F-inch diameter main line trench with two pipes; approximately 8,600 feet of 8 to 16-inch diameter main line trench with a single pipe; approximately 3,400 feet of water service laterals; and associated flow control valve station, electrical vault, communications pull box water meter boxes, fine hydrants and laterals; and connections to existing pipelines. Several separate services and tie-ins will be installed and Additive Alternates A, B and C may be installed. In summary the water line replacement will include: Bid Schedule No. 1 - Northwoods Boulevard Bid Schedule No. 2 - Zermatt Drive Bid Schedule No. 3- Snowpeak to Sierra Glen (Stations 17+50 to 32+77.83) Bid Schedule No. 4- Miscellaneous Work Bid Schedule No. 5 - West Reed Avenue Additive Alternative A- Bid Schedule No. 6—Kitzbuhel Road Additive Alternative B - Bid Schedule No. 7—Snowpeak to Sierra Glen (Stations 0+00 to 17+50) Additive Altemative C- Bid Schedule No. 8—Fjord to Snowpeak The Tahoe Donner Substation Rebuild project began during the 2009 construction season and the project was not completed. We understand that TDPUD would like to continue work on this project during 2010 to complete the project. SCOPE OF SERVICES District Pipeline—2010— Contract A Based on our current understanding of the project, we anticipate providing the following services: • Attend Pre-Construction and/or Progress meetings as requested. We anticipate up to four Pre-Construction or Progress meetings at the district offices. • Observation of earthwork materials and placement procedures to help verify compliance with project plans and specifications, and Town of Truckee design standards. • Field density testing of underground utility trench backfill, pavement subgrade and aggregate base to evaluate relative compaction. Holdmge&Kull Proposal No PT10019 Propose/for Eart wAxk%wrva0on and Testing TDPUD 2010 Projects March 9,2010 Paw 3 • Laboratory testing of soil samples for dry density evaluation (compaction curves) and sieve analyses. Asphalt concrete paving observation and testing. Field tests will include nuclear gauge density, temperature and thickness measurements. • Project management and review will involve scheduling and supervision of our technicians, review of data and reports, and report preparation. Engineering consultation will be provided on an as requested basis. Project reports will include all field and laboratory test results, daily field reports and a summary of compliance with the contract documents. 2010 Tahoe Donner Substation Rebuild Project Based on our current understanding of the project, we anticipate providing the following services during construction of the Tahoe Donner Substation Rebuild project: • Observation of foundation excavations, and placement and compaction of engineered fill. • Field density testing of backfill and pavement subgrade. • Laboratory testing of soil samples for dry density evaluation (compaction curves). • Reinforced concrete special inspection during placement of concrete for the structure. • Project management and review will involve scheduling and supervision of our technicians, review of data and reports, and report preparation. Engineering consultation will be provided on an as requested basis. Our services will not include supervision or direction of construction personnel, acceptance of the contractor's work; interpretation or modification of the project plans or specifications; or job site safety. Holdrege&Kull Proposal No.PT10019 P►vposal for EarMwt)t*Observation and Testing TDPUD 2010 Projects March 9,2010 ft2 4 SCHEDULE AND FEES District Pipeline--2010— Contract A We understand that the project is subject to State of California Prevailing Wage rates. Fees for our services will be provided on a time and materials basis in accordance with the enclosed 2010 Prevailing Wage Fee Schedule. Our general approach to the project will be to provide one engineering technician as needed for the project. We will try to coordinate our services required with the contractor's schedule to help reduce the number of trips to the site. We anticipate that our technician will be on the project an average of 6 hours per day. We anticipate that on paving days our technician will be on site for up to 8 hours per day. For the scope of work outlined above, we estimate our fees will range up to about $76,800. A summary of our estimated fees are presented in Table 1, attached. Preparation of this proposal and our fee estimate required the following assumptions: • The project will start May 3 and end October 15 for a total of 24 weeks, requiring about 120 working days to complete. We anticipate 1 to 3 construction crews will be working at a time. During this time we will provide a technician on an intermittent basis an average of 6 hours per day, 5 days per week. Our technician will likely make more than one site visit per day. Based on our experience from last year, we have budgeted 4 Saturdays at an over-time rate. We anticipate up to 20 laboratory compaction curves will be required during construction. • Subgrade preparation and aggregate base placement will occur within the 24 week period. We have budgeted an additional two hours per day over 10 working days for this task. • Asphalt concrete paving will also occur within the 24 week time period. Again, we have budgeted 2 hours per day over 10 working days for this task. During this time, we will provide a technician on site to measure AC thickness, temperature and compaction. No laboratory tests on asphalt concrete material are planned_ If requested, laboratory tests for asphalt concrete may include, aggregate gradation, oil content and Rice maximum theoretical density. Cores to evaluate relative compaction (based on the Rice) and thickness would be obtained only at TDPUD's request. Holdr+ege&Kull Proposal Ab.PT10019 Proposal for Earthwork Observation and Testing TDPUD 2010 Projects March 9,2010 P&JO 5 2010 Tahoe Donner Substation Rebuild Project Again, we will coordinate our services with the contractor's schedule to help reduce the time and number of trips to the site. We anticipate that our technician will be on the project,up to about 4 hours per day. For the scope of work outlined above, we estimate our fees will range up to about $3,500 for a total fee of approximately$80,000. A summary of our estimated fees are presented in Table 2, attached. Preparation of this proposal and our fee estimate required the following assumptions: • Foundation excavation observation and placement and compaction of engineered fill will require up to 3 site visits by our technician for 2 hours per visit. We anticipate up to 2 laboratory compaction curves will be required during construction. • We anticipate reinforced concrete special inspection will require up to 3 site visits with an average of 4 hours per visit. We anticipate up to 3 sets of four concrete cylinders will be required for compressive strength tests in our laboratory. • We have budgeted 3 site visits for field density testing and up to 3 laboratory compaction curves for the Substation Rebuild project. In the event that conditions arise which are beyond our control, unknown at the time this proposal was prepared, unanticipated based on available information, or differ significantly from the assumptions outlined above, we may need to revise our scope and estimated fee in order to complete the project. Should this occur, we would contact you for authorization before proceeding with additional worts. Actual time required may vary, depending on the contractor's schedule, weather, changes in engineering design, and other unexpected factors. Progress billing for the project will be monthly. UMITATIONS Testing services provided by Holdrege & Kull will be performed consistent with generally accepted practices employed in Northern California. The owner and contractor are hereby informed that in all cases the contractor is solely responsible for the direction and quality of the work, adherence to plans and specifications, and repair of defects regardless of when they are discovered. Holdrege&Kull Propose!N0.PT10019 Proposal lbr EartH mk Observadon and Testing TDPUD 2010 Pnjects March 9,2010 —Page6 CLOSING Holdrege & Kull will perform its services in a manner consistent with the standard of care and skill ordinarily exercised by members of the profession practicing under similar conditions in the geographic vicinity and at the time the services will be performed. No warranty or guarantee, express or implied, is part of the services offered by this proposal. We understand that you will provide a TDPUD Master Services Agreement for authorization of our services. This proposal is deemed to be incorporated into and made part of the Agreement We appreciate the opportunity to provide our services to TDPUD and we look forward to working with you on this project. If you have any questions or need additional information, please contact the undersigned. Sincerely, Holdrege& Kull Matthew E. Dodge JJoh K. Hudson, P.E., C.E.G. Staff Engineer Engineer Enclosures: Table 1 Contract A-Earthwork Observation and Testing Cost Estimate Table 2 Substation-Earthwork and Materials Testing Cost Estimate Holdrege&Kull TABLE 1 EARTHWORK OBSERVATION AND TESTING COST ESTIMATE Truckee Donner PUD District Pipeline Replacement-2010- Contract A Task Estimated Unit Rate Total Units Und round Utilities Supervisory Technician 20 Days 40t 2 hr*day 40 $85.00 $3,400.00 E Technician 120 Days 41 6 hraMay 720 $78.00 $56,160.00 Engineering Technician O 4 6 hrs/ 24 $103.00 $2,472.00 Laboratory Compaction Curve 20 1 Tests 20 $190.00 $3,800.00 Sieve Analysis 4 Tests 4 $110.00 $440.00 SUBTOTAL= $66,272.00 Subgracle Pre ration and to Base Placement Field Engineer 2 Da Q 2 hrs/da 4 $105.00 $420.00 Engineering Technician 10 Days @ 2 hrsklay 20 $78.00 $1,560.00 Laboratory Compaction Curve 2 Tests 2 $190.00 $380.00 Sieve Analysis 2 Tests 2 $110.001 $220.00 SUBTOTAL= $2,580.00 Asphalt Concrete Placement Observation and Testi Su Technician 2 Days 0 2 hrs/ 4 $85.00 $340.00 Engineering Technician 10 Days IM 2 hrsJ 20 $78.00 $1,560.00 Extraction 0 Tests C 0 $135.00 $0.00 Gradation 0 Tests @ 0 $120.00 $0.00 Rice Density 0 Tests a 0 $W.00 $0.00 Core Density 0 Tests a 0 $35.00 $0.00 Coring Machine 0 days @ 0 $300.00 $0.00 ISUBTOTAL= $1,900.00 Re ration and P ilia ent Senior Engineer 1724 4 Weeks 0.5 hrs/week 12 $125.00 $1.500.00 Su rviso Technician Weeks 91 1.5 hrs/week 36 $85.00 $3,060.00 Project Assistant 24 Weeks @ 1 hrshweek 24 $60.00 $1,440.00 SUBTOTAL= $6,000.00 CONTRACT"A"TOTAL: $76 752.00 Page 1 TABLE 2 EARTHWORK OBSERVATION AND TESTING COST ESTIMATE Truckee Donner PUD 2010-Tahoe Donner Substation Rebuild Task Estimated Unit Rate Total Foundation Excavation Observation and Field Dens' TestingUnits Field Technician 3 Days hrstday 6 $78.00 $468.00 om Laboratory p on Curve 2 Tests t 2 $195.00 $390.00 SUBTOTAL= $858.00 Cast in Place Concrete Testing and Reinforci Steel S 1al Inspection S ial Inspector 3 Days Q 4 hrs/da 12 $78.00 $936.00 Laboratory Compression Tests 3 Sets @T 4 cylinders/set 12 $25.00 $300.00 SUBTOTAL= 1,236.00 Re Preparation and P744 nagement Senior Engineer Weeks 0.5 hrsJweek 2 $126.00 $260.00 Su iso Technician Weeks 90 2 hrs/week 8 $85.001 $680.00 Project Assistant 4 Weeks @ 2 hmkfeek 8 $60.001 $480.00 iSUBTOTAIL= $1,410.001 SUBSTATION REBUILD TOTAL: $3,504.00 TOTAL ESTIMATED COST: $80,256.00 Page 2