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HomeMy WebLinkAboutRDA ST IMPROVEMENTS 11-01-82TO: FROM: WILLIAM HUSTON, EXECUTIVE DIRECTOR TUSTIN COMMUNITY REDEVELOPMENT AGENCY BOB LEDENDECKER, DIRECTOR OF PUBLIC WORKS/CITY ENGINEER DALE WICK, ASSISTANT CITY ENGINEER SUBJECT: EL CAMINO REAL/MAIN STREET IMPROVEMENTS RE-CAP OF COST OVER-RUNS Per the Agency's request, tabulated below are the various cost over-run items known to date for subject project, with explanations of each item: ITEM EXPLANATION TOTA ~OST Extend 10" water main on E1 Camino Real from 150' S. of First Street to First St. The 10" water main installed several years ago on E1Camino Real was stopped about 150 feet south of First Street. It was felt that it would be advisable to extend this main northerly past the crosswalk to prevent future dig-up of the inter- locking pavers (or cobblestones as some call them). $6,109.80 e Miscellaneous cost over-runs in connection with water main work. This work consisted of water main fittings, valves, and tapping sleeves which were called for on the plans, but not included as bid items in the bid document. 6,493.50 3. Furnish and install "Tustin This item was requested and approved Area Museum" sign. by the Redevelopment Agency. 3,653.00 0 Provide and place aggregate base access ramps at drive- ways and street inter- sections. This item was requested by the Redevelopment Agency to provide better access to businesses. The total cost is based on estimated tonnage. To date, approximately $5,000.00 of the estimated cost of $9,000.00 has been expended. 9,000.00 o Construct new catch basin at the northwest corner of Main St. and Prospect Ave. This catch basin was deleted from the storm drain constructed last year on Main Street between Prebble and Prospect pending the downtown redevelopment project. It was in- advertently not included on the plans for the E1Camino/Main Street improvements. 5,083.25 RE-CAP OF COST OVER-RUN~ OCTOBER 25, 1982 PAGE TWO ITEM EXPLANATION TOT~L COST o 10. Close-up skylights on north side Main Street between E1Camino Real and Prospect. Replace existing steel checker plate Edison vault covers with decorative covers, Furnish, install and paint wood sign posts for traffic control and directional signs. Furnish and place aggregate base for pavement subgrade. Repair, replace, or lower existing utility services. This work was called for on the plans, but not detailed or in- cluded as a bid item in the bid document. The Engineer expended considerable time working with the Edison Co. to evolve a decorative cover which Edison tentatively approved. After bids were opened, Edison rejected the cover called for on the plans. A different type of cover had to be specified with the resultant extra cost. It was the City's intent to replace all steel channel sign posts with wood posts stained to match the decor of other hardscape items. The plans and specs neglected to include this item. During the course of the work, a shortage of dirt evolved due to the fact that the existing pavement being removed was much thicker than anticipated. In addition, many areas of unsuitable pumping or boggy subgrade were uncovered. It was determined to utilize aggregate base to replace the dirt shortage and dig out of the boggy areas and replace with aggregate base. The total cost is based on estimated tonnage. To date, approximately $11,000.00 of the estimated cost of $15,000.00 has been expended. It was discovered that many of the water and gas services were laid directly under the old sidewalk. Some were broken during the side- walk removal and many had to be lowered to permit subgrade compac- tion and installation of the new sidewalk $1,800.00 10,910.00 2,940.00 15,000.00 876.86 RE-CAP OF COST OVER-RUNS OCTOBER 25, 1982 PAGE THREE 11. 12. ITEM Excavate roots and deleterious material from behind ficus trees and replace with aggregate base. Pump out abandoned gasoline tanks and fill with cement slurry. 13. Additional excavation. 14. Additional decorative side- walk pavers. EXPLANATION During the course of the sidewalk work, it was found that the root structure of the Ficus trees was so extensive that the contractor was unable to obtain proper compaction for the sidewalk pavers. It was determined that the roots should be removed and replaced with aggregate base to prevent future settlement of the pavers. During Phase III removals, two abandoned underground gasoline tanks were uncovered within the public right-of-way at the Tustin Garage at 6th & E1Camino Real. Per Fire Marshall requirements, it was necessary to pump these tanks and fil) with cement slurry. This work necessitated hiring a special hauler capable of hauling hazardous material as well as obtaining a State Hazardous Waste Permit. Old State Highway plans indicated that the existing concrete pavement was 7" thick. Our records indicated 3" to 4" of asphalt concrete overlay had been placed over this. The contract excavation quantity was based on a total of 11" thick pave- ment removal. During the removals, it was discovered that the pavement in some areas was much thicker, up to 18" total in some places. The $20,000 over-run is an estimate for the entire project since all re- movals are not completed as of this date. To provide project uniformity, the design architect determined that additional sidewalk paver areas should be added. During the rush of meeting the plan submittal dead- line, they had neglected to show on the plans all of the decorative sidewalk paver areas intended. An additional 668 sq. ft. was added. TOTAL COST $4,966.56 845.04 20,000.00 2,571.80 RE-CAP OF COST OVER-RUNS OCTOBER 25, 1982 PAGE FOUR ITEM EXPLANATION TOTAL COST 15. Additional 6"x6" PCC header. This is the concrete ribbon utilized to retain the sidewalk pavers. The quantity take-off utilized for the bid document was in error by an estimated 1,000 L.F. $5,700.00 16. Transfer excess dirt from water main trench on Main St. to low subgrade area east side E1 Camino Real between 1st & 3rd. It was determined that contractor should receive payment for this work under provisions of State of Cali- fornia specifications under which this project is operating. 1,308.20 17. Miscellaneous This item consists of miscellaneous extra work ordered by the inspector to expedite the project such as: lowering existing traffic signal conduits which were not originally installed deep enough, misc. traffic signal pull box modifications and repairs, remove wet material to expedite curb & gutter pour, crush existing abandoned irrigation line uncovered during removals and other minor misc. work. 2,378.95 SUBTOTAL COST OVER-RUNS $99,636.96 The following items cannot be considered cost over-runs, but are project expenses which:much be considered in the over-all cost of the project. 18. ITEM Blueprinting. EXPLANATION TOTA~ Printing costs for this project are very high due to the large number of sheets involved (32) and the many subcontractors who all must have copies of plans. In addition, during the bidding process, about 40 sets of plans & specs were taken out by prospective bidders. $1,536.40 RE-CAP OF COST OVER-RUNS OCTOBER 25, 1982 PAGE FIVE ITEM EXPLJ~NATION TOTAl. COST 19. Soils and compaction test- ing. This is not normally a large item to consider. In this case, due to the urgency of completing the work, it was necessary to ingage a private laboratory for soils testing because we could not get the required ser- vice out of Orange County's lab. By utilizing private industry, costs have about doubled. The $8,000 cost is an estimate of the amount to complete the project. To date, $5,401.85 has been expended. $8,000.00 20. Film. This is cost of film purchased to keep a pictorial record of project progress as requested by the Re- development Agency. In addition, the photos are utilized in the event of any future litigation. 237.45 21. Barricades This is cost of renting barricades for the "Downtown Merchants are Open for Business" signs as request- ed by the Redevelopment Agency. 413.40 SUBTOTAL PROJECT EXPENSES $10,187.25 GRAND TOT~ COST OVER-RUNS & PROJECT EXPENSES $109,824.21 The Grand Total of $109,824.21 is still an estimated amount and it is conceivable that this figure could increase or decrease depending on the results of the final field measurements of all of the various contract items, which will be made when the project is complete. Hopefully, the original contact quantities are accurate enough so that there will be no significant increase from this estimated amount. DALE A. WICK ASSISTANT CITY ENGINEER db CC: Ci-ty Clerk Finance Director B.S.I.