California Department of Transportation

Contract 10-0U9404

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) Per Sht 6 of 10 Are we to assume that Type III Detail will be used on this project as we have done many panel replacements in this stretch of 99 and have never put dowels in these slabs. There is not a pay item for dowels and it does not appear to be covered in Bid item #8 RCS.

A1) Dowel bars are not required to be installed during slab replacement for this contract. Therefore, the Type III detail on Revised Standard Plan RSP P8 (Sheet 6 of the plans)should be used. 8Mar11

Q2) Per Sht 7 of 10 Concrete Pavement Joint Details-Is Caltrans intention to use these details on all panels on this project, this has not been done typically on slab replacements in this area. How are the Types of joints determined? There are 5 Listed.

A2) Type C and Type R details on RSP P20 (Sheet 7 of the plans) do not apply. Please use either Type A1 and Type A2, or Type B details. Refer also to "Joints" under "Rapid Strength Concrete" in Section 10-1.16 "REPLACE CONCRETE PAVEMENT (RAPID STRENGTH CONCRETE)" of the Special Provisions. 8Mar11

Q3) Per Sht 7 of 10 How are the joint being paid for, there is not a paid item and it does not appear to be covered in Item #8 RCS?

A3) Special Provisions Section 10-1.16 "Measurement and Payment" states that "replace concrete pavement (RSC) is measured and paid for in the same manner specified for concrete pavement in Section 40-4, "Measurement and Payment," of the Standard Specifications. Section 40-4.02, "Payments" specifies that payment for concrete pavement "includes full compensation for furnishing all labor, materials, tools, equipment, and incidentals, and for doing all the work involved in constructing the concrete pavement, complete in place." 8Mar11

Q4) Regarding the addition of section 10-1.18 Disposal of Portland Cement Concrete Pavement Grooving and Grinding Residues (pg. 61 Special Provisions) and Plan Sheet 2 of 10 'Typical Cross Sections X-1' Note: 6 'Daylight into existing as shoulder when grinding existing concrete pavement in the contract documents, are we to assume that all panel replacements get ground in conformance with Standard Specifications Section 42-2 'Grinding'? If so, where is this item called for/paid under in the Special Provisions?

A4) Note 6 on Typical Cross Sections X-1 (Sheet 2 of the plans), "DAYLIGHT INTO EXISTING 'AS' (i.e., AC) SHOULDER WHEN GRINDING EXISTING CONCRETE PAVEMENT," refers to corrective grinding that may be necessary to meet smoothness and friction requirements for the new concrete pavement. Grinding shall extend to adjacent existing concrete pavement to provide a uniform smoothness across all lanes. Section 40-4 "Measurement and Payment" of the amended Standard Specifications states, "Full compensation for grooving and grinding for final finishing is included in the contract price paid per cubic yard for concrete pavement as designated in the Verified Bid Item List and no separate payment will be made therefor." 12Mar11

Q5) 10-1.13 PCMS Measurement and Payment, last sentence states contractor will be paid extra work at force account for PCMS ordered in excess of the number shown on the plans. Could Caltrans please share their anticipated quantity, we are unable to find any in the plans and it is a LS item?

A5) Section 10-1.13 "Portable Changeable Message Signs," subsection "Construction," of the Special Provisions provides the minimum number of message signs required: "Place two portable changeable message signs in advance of the first warning sign for each lane closure and one for each ramp (closure)." Bidders must determine the quantity of portable changeable message signs required based on their estimate of lane and ramp closures that will be necessary to perform the work. 15Mar11

Q6) 10-1.16 Replace Concrete Pavement (RSC) For pavement in excess of 10 inches thick, what is the required strength before opening to traffic, state has two pay tables, less than 10" is 400psi 10" plus is 333psi, but under engineers acceptance it states 400psi is required to open to traffic. Please clarify?

A6) The required strength for RSC pavement before opening to traffic is 400 psi, as stated in Section 10-1.16 "Replace Concrete Pavement (Rapid Strength Concrete),” subsection "Engineer's Acceptance for Modulus of Rupture," of the Special Provisions. Since the "planned replacement pavement nominal thickness” is greater than 10 inches (refer to "Roadway Items" depth on the Summary of Quantities Plan, Q-2), payment for Rapid Strength Concrete (RSC) may be adjusted for actual opening-to-traffic and/or 7-day Modulus of Rupture results as they correspond to the conditions listed in subsection "Pay Factor Adjustment for Low Modulus of Rupture” for pavement thickness 10 inches or greater (bottom of pg. 53). 15Mar11

Q7) Can I get a copy of the Plan holders list?

A7) The list of planholders for contracts is available on the Caltrans Office Engineer website at 12Mar11