California Department of Transportation
 

Contract 10-0V1704

The responses to bidder's inquiries, unless incorporated into a formal addendem to the contract, are not a part of the contract and are provided for the bidder's convenience only. In some instances, the question and answer may represent a summary of the matters discussed rather than a word-for-word recitation. The availability or use of information provided in the responses to bidder's inquiries is not to be construed in any way as a waiver of the provisions of Section 2-1.03 of the Standard Specifications or any other provision of the contract, the plans, Standard Specifications or Special Provisions, nor to excuse the contractor from full compliance with those contract requirements. Bidders are cautioned that subsequent responses or contract addenda may affect or vary a response previously given.


Q1) Since the project that ties into this project was postponed (03-0F5904) until 12/1, doesn't it make sense to postpone this project? In addition, 03-1F4504 ties in to the north end of 03-0F5904 and it makes sense to bid the larger of the 3 projects first. There is definite economic benefit for the state to bid the larger middle project first, then bid the smaller pieces afterward.

A1) Your comments are noted. There are no plans to postpone the bid opening for this project. 23Sep10


Q2) Are there any cross sections available for this project and any other data on horizontal control for this project.

A2) The only cross sections provided are Typical Cross Sections, on Sheet X-1 (Sheet 2 of the plans). No other horizontal control is available for this project. 29Sep10


Q3) Refering to the COLD PLANE AC PAVEMENT, HMA (TYPE A) (RAMPS) chart on the Summary of Quantities Q-3 (sheet no.13). Does the HMA (type A) column include the 0.15 HMA (type A) overlay quantity per plan B on the Construction Details C-1 (sheet no.3)?

A3) The HMA (Type A) column on the "Cold Plane AC Pavement, HMA (Type A) (Ramp Conform Tapers) on Summary of Quantities, Sheet Q-3, refers back to Construction Details, Sheet C-1. The plan you use (A or B) depends on the Ramp Paving Table located on that sheet. This quantity is only for the 0.15' conform taper portion of the ramps and the HMA needed to fill in the conform.

The complete HMA quantity to pave all the ramps is on the Summary of Quantities Sheet Q-7, Roadway Items Table, on the row that says Ramp Travel Lanes and the column for HMA (Type A). Subtract this total HMA amount from the Cold Plane AC Pavement (Ramp Conform Tapers) and Cold Plane AC Pavement (Ramp Travel Lanes) and that gives you the remainder of the AC needed to pave the ramps. 1Oct10.


Q4) Refer to the COLD PLANE AC PAVEMENT, HMA (TYPE A) (RAMPS) chart on the Summary of Quantities Q-3 (sheet no.13). Some of the ramps at Hammer Lane, Eight Mile Road, and Turner Road do not specify a Length, Width, Depth, or cold plane AC pavement area, yet there is a HMA quantity provided. Can the information used to generate the HMA quantity be provided (i.e.; limits, length, width, depth, and area)?

A4) The "Cold Plane AC Pavement, HMA (Type A) (Ramp Conform Tapers) on Summary of Quantities, Sheet Q-3, refers back to Construction Details, Sheet C-1. This table has Length Width and Depth and quantities for each ramp.

The "Cold Plane AC Pavement, HMA (Type A) (Ramp Travel Lanes) on Summary of Quantities, Sheet Q-3, refers back to Typical Cross-Sections, Sheet X-1. This table has Length Width and Depth and quantities needed to do the needed 0.25' dig-outs at the ramps specified on the table. The exact ramp digout locations will be clearly defined with RE and the Contractor during construction.

The complete HMA quantity to do the 0.15' HMA overlay of all the ramps is on the Summary of Quantities Sheet Q-7, Roadway Items Table, on the row that says Ramp Travel Lanes and the column for HMA (Type A). Subtract this total HMA amount from the Cold Plane AC Pavement (Ramp Conform Tapers) and Cold Plane AC Pavement (Ramp Travel Lanes) and that gives you the remainder of the AC needed to pave the ramps.
1Oct10. The "Cold Plane AC Pavement, HMA (Type A) (Ramps)" chart on Summary of Quantities Q-3 (Sheet 13 of the plans) provides the approximate length and width of the cold plane areas along with the estimated quantity of HMA needed to fill the cold plane areas and to pave the ramp. For locations that do not require cold planing, only the estimated quantity of HMA for paving the ramp is provided. Refer to the "Table of Ramp Paving" on Construction Details C-1 (Sheet 3 of the plans).13Oct10


Q5) The Cold Plane Asphalt Concrete Pavement spec states the following "Schedule cold planing activities to ensure hot mix asphalt (HMA)is placed over cold planed area during the same work shift before opening to traffic." under section 10-1.01 Order of Work paragraph 6 states the following "The uppermost layer of pavement shall not be placed until all underlaying conduits and loop detectors have been installed." We have to cold plane prior to installing conduits and loops. Thers is a conflict between the cold plane spec and the order of work. There is not enough time in a shift to cold plane, install conduit, loops and pave. Please change the spec so that time is allowed between cold planning and placing finished lift of HMA so that other required work can be completed.

A5) The Special Provisions, section for Cold Plane Asphalt Concrete Pavement, Paragraph 2, under the Sequence and Scheduling continues to state that "If you cannot place HMA over the entire cold planed area before opening it to traffic: The contractor may....
1. Construct a temporary HMA taper to the level of the existing pavement.

The HMA that fills in the 0.25' deep repair dig out or 0.15 conform grind at the locations where there are loops to be placed will need to be scheduled and coordinated so that we maintain the requirements and exceptions called out in the Special Provisions and Standard Specifications. 1Oct10.


Q6) Dowel Bars are 18 inches in length, but are only drilled and bonded 9 inches into the pavement does the state pay the length of bar or the length drilled and bonded into concrete?

A6) Dowel bars will be measured and paid by length (Linear Foot) of bar. 12Oct10


Q7) Will data cores need to be taken on the shoulder paving?

A7) No. Data cores are taken from lanes, including ramp lanes, as specified in Section 10-1.22 "HOT MIX ASPHALT," subsection "Construction," of the Special Provisions. 12Oct10


Q8) Can the job be postponed?

A8) No, the bid opening will not be postponed. 12Oct10


Q9) Will dowels bars be required at transverse joints that are not at the ends of repair sections? Example, 180ft repair section, 12 dowels drilled and bonded at each end (24dowels), 180ft would be about 10panels leaving 9 transverse joints in the new RSC concrete that specs are unclear if those joints require dowel bars....the bars would be in baskets and would be skewed 1 to 6 to match the adjacent lane, are they required.

A9) Refer to the "Replace Concrete Pavement" detail on Construction Details plan C-3 (Sheet 5 of the plans) and Note 3: "Dowel bars shall be used to tie new slabs to existing slabs." Dowel bar placement for transverse construction joints in the new pavement depend on the Contractor's production rate for Replace Concrete Pavement. Refer also to Revised Standard Plan RSP P8, "Jointed Plain Concrete Pavement-Individual Slab Replacement" (Sheet 24 of the plans) for dowel placement. For slab replacements greater than 100 feet refer to Revised Standard Plan RSP P1, "Jointed Plain Concrete Pavement."

RSP 1 may be viewed at http://www.dot.ca.gov/hq/esc/oe/project_plans/HTM/stdplns-US-customary-units-new06.htm#pavement. 12Oct10


Q10) When panels in excess of 15 ft are poured and we cut a new transverse joint midway thru the slab are dowel bars required at these joints?

A10) Refer to Note 5 on Revised Standard Plan RSP P8 (Sheet 24 of the plans): "Transverse joint to match skew of existing joint. Omit dowels." 12Oct10


Q11) Please explain how the quantity of drill and bond dowel bar was calculated in terms of LF of drill and bond dowel per 18ft panel.

A11) The quantity of dowel bars (drill and bond) is an estimate based on the various total lengths of slabs to be replaced and expected production rate for slab replacement, and includes round-up. Refer to the quantity summary for dowel bars in the "Concrete Pavement Items" on Summary of Quantities plans Q-1 and Q-2 (Sheets 11 and 12 of the plans). 12Oct10


Q12)on page C-1 of the plans the Tabel of Ramp Paving the "x" in the table appears to be the width of the ramp (that is what the Plan A and B on C-1 show for "x"). However some of the feet used in the "x" column seem to be wider than the ramps. NB on ramp Peltier Rd has a "x" width of 164'. The ramp is not that wide.

A12) That is correct. The quantities for X and Y were mistakenly switched for NB On-Ramp Peltier Road on Construction Details C-1 (Sheet 3 of the plans). Refer to "Cold Plane AC Pavement, HMA (Type A) (Ramps)," on Summary of Quantities plan Q-3 (Sheet 13 of the plans), where it shows the approach and departure length and width of each ramp, along with the associated bid item quantities for these locations. 12Oct10


Q13) In Q4 the state said" The completed HMA quantity to do the .15" HMA overlay of all the ramps is on on the Summary of Quantities Sheet Q-7, Roadway Items Talbe, on the row that says Ramp Travel Lanes and the column for HMA (Type A). Subtract this total HMA amount from the Cold Plane AC Pavement (ramp Conform Tapers) and Cold Plane AC pavement (Ramp Travel Lanes)and that gives you the remainder of the AC needed to Pave the Ramps" This does not make sence. Please clarify.

A13) Refer to the "Roadway Items" table on Summary of Quantities plan Q-7 (Sheet 17 of the plans). The location described as "Ramps" provides total estimated quantities for cold plane areas and resurfacing of the ramps. The row described as "Ramp Conform Tapers" provides the total quantities for conform tapers on the ramps. Refer to the "Cold Plane AC Pavement" tables on Summary of Quantities Q-3 (Sheet 13 of the plans) for dimensions. Also, see response to Question 4. 13Oct10