California Department of Transportation
 

Contract 05-0G0304

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) Will Cross Sections and Layout Plans be available for this job?

A1) Cross Sections and Plans are not available at this time.


Q2) Referring to the summary of quantities, sheet no. 123. I cannot find a detail showing cold planing at 0.10'. What areas are to be cold planed at this depth?

A2) The 0.10' foot thick sections of Cold Plane AC Pavement listed by Post Miles and measured in square yards is for removing the thin overlay of AC that has been placed over the existing concrete slabs in small sections along Highway 101 in both directions and lanes prior to crack and seating operations. There is no specific detail for this.


Q3) Per section 10-1.01 Order of Work, "The work shall be performed in conformance with the stages of construction shown on the plans." Since the stage 1 and 2 plans are for the bridge widening only, does this imply that HMA operations outside these areas cannot begin until the bridge work is completed? Or can the HMA operations proceed concurrently outside the bridge widening areas? When can HMA operations begin?

A3) Stage Construction should not be confused with work being accomplished in the "Initial Bid Package" or work that is being accomplished in "Design Sequence 1". Stage Construction refers to the bridge widening. The HMA operations on the highway (excluding ramps) is accomplished in the Initial Bid Package before the bridge widening. HMA operations can begin as soon as all prerequisites are met.


Q4) On plan sheet C-9 pg 26, the detail of Limits for Typical Off-Ramp HMA Overlay, shows the "Limits for Typical Offramp Overlay Sequence 1". Do these limits apply to all Off-ramps or just the Off-ramps adjacent to the bridges with work shown under Design Sequence 1, pg 255? What is the purpose of these Off-ramp "Limits"?

A4) The Limits for Typical Off-Ramp HMA Overlay Sequence 1 applies at all off ramps. The HMA overlay ramp designs are not complete at this time, but will be supplied in the Design Sequence 1 plans.


Q5) Regarding The Typical Median Crossover Paving detail on sht. no. 9 (X-8), what are the limits and at what stations does this detail occur?

A5) The Typical Median Crossover Cross Section on Plan Sheet X-8 is for Tassajara Creek Road Crossover located at PM 36.8.


Q6) Items 42,43 and 44 call for reconstructing existing metal beam guard railing.Are the existing posts and blocks for these items of work to be replaced in kind or are steel posts required?

A6) Refer to addendum # 1.


Q7) Based on our past experience on other contracts, it is our understanding that UDBE subcontractors cannot be rejected based only on pricing and that there needs to be a significant price difference between a low non-UDBE subcontractor and a 2nd place UDBE, and if there is not a significant price difference then the expectation is that the 2nd place UBDE will be used in lieu of the low non-UDBE subcontractor. Is this the expectation for this contract? If so, what amount does Caltrans consider to be a significant enough difference to select a 2nd place UDBE over a low non-UDBE?

A7) The price difference should not be excessive or unreasonable, based on the federal regulations.


Q8) On Plan sheet C-9 pg 26, the detail for the "Limits for Typical Off Ramp HMA Overlay" does not show the limits of the Rubberized Hot Mix Asphalt. Where does the 0.2' Rubberized Hot Mix Asphalt stop and the 0.45' Hot Mix Asphalt begin on the On-Off Ramps? Is there a detail for the transition from RHMAG to HMA?

A8) The Limits For Typical Ramp HMA Overlay detail on Plan Sheet C-9 is to show the run off length of 225 feet for the 0.45' overlay, which includes the RHMA lift. The design for the ramp HMA overlay will be accomplished in Design Sequence 1.


Q9) What is the completion date for contract #05-402801? Will contract #05-402801 impact any of the work on 05-0G0304? If so, how?

A9) The estimated contract acceptance date for contract 05-402804 is February 2011. Your attention is directed to Section 7-1.14 "Cooperation" of the Standard Specifications.


Q10) On Page 18, Section 5-1.03, mentions the UDBE Commitment Form and UDBE Specifications, that are found in Section 2, "Bidding" of the Special Provisions. However these forms are not in the book. Will you be adding this Section in an Addendum?

A10) The "Caltrans Bidder - UDBE - Commitment" form is supplied in the "Bid" Book and for a 24 hrs request, please Download the request form from the following website and fax it to (916) 654-7028.
http://www.dot.ca.gov/hq/esc/oe/weekly_ads/bid_documents_via_fax.pdf


Q11) Why are there two bid items for temporary concrete washouts on this contract (items 11 & 19)? Typically we only see one or the other.

A11) Due to the length of the project and the multiple locations where concrete will be placed, it was assumed a Temporary Concrete Washout (Portable) station would be beneficial to the contractor. The two (2)Temporary Concrete Washout stations are for bridge construction at Santa Margarita Creek Bridge and Traffic Way Undercrossing.


Q12) Please refer to plan sheet Q-8 which has 159.8 sqyd of Place HMA (miscellaneous area) shown to be on the R-3, R-18 and R-22 ramps. We have not found this work on the plans. Could you please provide more information as to what this work is.

A12) The Place HMA (Miscellaneous Area) at R-3, R-18, and R-22 are for placing hot mix asphalt in gore areas.


Q13) Will the State allow a portable asphalt plant in the right a way for this project?

A13) Your attention is directed to Section 5-1.12 "Areas for Contractor's Use" of the Special Provisions, Sections 7-1.01 "Laws to be Observed" and 7-1.09 "Public Safety" of the Standard Specifications. No area within the contract limits is for the exclusive use of the Contractor. Areas to be used will be approved by the Engineer based on the needs of the State, public safety and environmental clearances. For temporary support facilities such as PCC and HMA batch plants the Contractor shall obtain all necessary permits, licenses, agreements, certifications or any combination of these including obtaining coverage under the Industrial General Permit.


Q14) Please refer to plan sheets C-1 to C-4. Various details on these sheets show a 225' HMA Conform Taper and refer to Note 1 which states, "HMA comform taper is temporary over existing PCC pavement and permanent over the HMA shoulders." Are the shoulders in these conform areas to be reconstructed with 1' of HMA, similiar to what is shown on C-4 at the bridges and as note 1 on C-4 implies, or does the HMA taper go over the existing shoulders? Additionally, please confirm that the grading for the shoulder reconstructions will be paid as roadway excavation. It is difficult to tell from the quantity sheets what Caltrans has included in the roadway excavation quantity.

A14) The note on C1-C3 referring to: "HMA conform taper is temporary over existing PCC pavement and permanent over the HMA shoulders" should be interpreted just as it is written.

There is no shoulder overlay work under the structures between the conform tapers.

The existing shoulders are not included in the one foot concrete pavement. Where widening occurs under a structure, the finished grade of the HMA shoulder shall be no higher than the highest existing elevation of the existing shoulder. This is to maintain the existing vertical clearance between the shoulder and the structure.

The shoulder reconstruct as shown on C-4 is for the additional traffic loading that will be shifted on to the shoulders during stage construction, for the listed bridges.

Roadway excavation for shoulder widening has been calculated and included in Roadway Quantities.


Q15) Please refer to section 10-2.04, Highway Planting, of the special provisions. How is Roadside Clearing paid?

A15) In accordance with Section 20-4, "Highway Planting", of the Standard Specifications, roadside clearing will be paid for under the lump sum of item number 62 "Highway Planting."


Q16) Will pinning of the temporary krail be required? Is so, please identify which krail will need to pinned.

A16) Pinning of the temporary Krail will be required in accordance with sheet T3, "Temporary Railing (Type K)" of the Standard Specifications.


Q17) Please refer to section 10-1.50, Hot Mix Asphalt, of the special provisions, specifically Vertical Joints on page 161. The 2nd paragraph states, "Place HMA on adjacent traveled way lanes so that at the end of each work shift, the distance between ends of HMA layers on adjacent lanes is between 5 feet and 10 feet." As the shoulders and median borders adjacent to the lane must also be paved prior to opening the lane, the Contractor will need to pave all the way across the freeway each shift. On other projects the special provisions have allowed for a vertical joint of up to 0.15' to be left between adjacent lanes opened to traffic. Since the HMA on this project will be placed in two layers (0.10' and 0.15') for the majority of the project, why couldn't the Contractor leave a vertical joint of not more that 0.15' between lanes versus paving across the entire freeway?

A17) The contract must be constructed in accordance with the contract documents for 05-0G0304 and shall be bid accordingly.


Q18) This project calls for RHMA to be placed under the guardrails as miscellaneous AC. In lieu of RHMA, Caltrans may want to consider changing this to HMA Type A if it will work for this application. The cost difference could be considerable. Please advise.

A18) The contractor should bid the place RHMA (Misc Area) as shown on the plan sheets.


Q19) Does the 'Good Faith Efforts Documentation' have to be submitted with the bid? Typically only the three lowest bidders have until the 4th business day after bid opening to submit this but it is not listed anywhere in the specs.

A19) Refer to addendum # 1.


Q20) How did Caltrans calculate the area of RHMA (misc area) on this project? Based on the details on sheet C-5 it looks like the RHMA (misc area) goes from approx ES to the hinge point which is approx 3' (5.25" narrower where there is dike). However, based on the quantities on sheets Q-1-3 it looks like the average width of the misc area is approx 1 foot. Please clarify

A20) Placement of RHMA (Misc Area) ends at the face of the MBGR Post. The typical cross sections should be reviewed for placement of shoulder backing or embankment up to the hinge point.


Q21) The plans on sheet 124, page Q-10, shows four tables of Roadside Clearing (Tree Removals). Each Tree to be removed greater than 6" DBH is listed. After onsite inspection of each area there are numerous trees with an orange dot on the base of the trunks which are greater than 6" DBH, but are not shown in the tables. Is it Caltrans intent to remove these trees, greater than 6" DBH, if they have an orange dot but are not listed in these tables? Or does the contractor figure just to remove the trees greater than 6" DBH per the plan tables? How should the contractor bid these?

A21) Trees marked with orange dots at the base are not necessarily marked for tree removal. Refer to Special Provisions, Section-10-2.04 (Roadside Clearing) and the Roadside Clearing Tables on Q-10 quantify the trees greater than 6" DBH to be removed as part of roadside clearing.


Q22) Please confirm that the limit of (edge) of RHMA( Misc Area) is at the traffic face of steel posts, as shown by shaded legend in the plan view. This limit is also established by quantification check refrenced in pre bid question # 20 previously posted.

A22) Yes, the limit of (edge) of RHMA (Misc Area) is at the traffic face of MBGR posts.


Q23) Ref. above question #22. Please inform the plan holders what material is to installed behind the steel posts shown in Sections A-A on C-5, if it's not RHMA( Misc Area).

A23) The contractor should use the typical cross sections to verify material on the sides and back of MBGR up to the hinge point.


Q24) Page C-6 of the Plans details a Thrie Beam Concrete Anchor Block.
How many are there? Where are they located? Under what Bid Item are they paid?

A24) The Thrie Beam connector detail shown on C-6 will be part of Design Sequence 1. The quantities and locations will be determined in Design Sequence 1.
The Thrie Beam Concrete Anchor Block work is included in the cost of doing the Transition Railing (Type WB) connection work. Sheet C-6 is designated as Design Sequence 1 work. For Sequence 1 work, see sheet Q3 under the column Transition Railing (Type WB) for the expected locations and quantities for the Thrie Beam Concrete Anchor Blocks with the Transition Railing (Type WB).


Q25) Given the number of bidder inquiries to address and the upcoming holiday, does Caltrans anticipate postponing the bid date of this contract? Several subcontractors are asking us as some of the bidder inquiries affect their work. Please advise.

A25) No, Caltrans will not postpone the bid open date.


Q26) Please refer to note 1 on plan sheet C-4 which states, "For limits of shoulder reconstruction at concrete pavement locations, see construction detail sheets C-1, C-2, C-3." There is no shoulder reconstruction identified on sheets C-1, C-2, or C-3. Please clarify.

A26) Please refer to Question #14.


Q27) Per Special provisions section 10-1.50 Hot Mix Asphalt the minimum California Test 371 result is 70 for the QC/QA HMA. However, it does not reference a minimum of 70 for the Standard process HMA (Leveling). Is the HMA (Leveling) under the Standard process required to have a minimum of 70 on CT 371? Or is the HMA (Leveling) Standard process okay under 70 for CT 371?

A27) For all HMA where a JMF is required, including HMA (Leveling), CTM 371 will be required in accordance with Section 10-1.50.