Caltrans Office Engineer

Viewing inquiries for 04-2285H4

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Inquiry #1: Are Cross Sections available for this project?
Inquiry submitted 10/16/2012

Response #1:Cross sections can be downloaded below:


www.dot.ca.gov/dist4/construction/contracts/04-2285H4/XSections.zip( zipped pdf, 14MB)
Response posted 10/18/2012




Inquiry #2: According to the bid schedule Bid Item No. 70 calls for Plant (Group M), quantity 10,500. Cannot locate this on the plans. Can you tell me which plan sheet contains this information.
Inquiry submitted 10/18/2012

Response #1:Submitted for consideration.
Response posted 10/19/2012


Response #2:Plant (Group M) can be found on the erosion Control Sheets (EC-1 to ECQ-1).
Response posted 10/23/2012




Inquiry #3: Regarding payment for Materials on Hand Special Provisions Section 5-1.10 Page 22 Currently dowels, dowel baskets, and tie bars are not included in the items listed for partial payments to the contractor for materials on hand (materials furnished but not incorporated into the work.

Please include partial payments to the contractor for dowel, dowel baskets, and tie bars as materials furnished but not incorporated into the work (Material On Hand) under section 5-1.10

Inquiry submitted 10/18/2012

Response #1:Submitted for consideration.
Response posted 10/19/2012


Response #2:Please bid per contract documents.
Response posted 10/23/2012




Inquiry #4: I believe there is a quantity bust on bid item #122 for 18" APC. The summary on plan sheet DQ-7 (page 127 of 435) for 18" APC should be 689.9', not 289.9' as shown.

Inquiry submitted 10/23/2012

Response #1:Submitted for consideration.
Response posted 10/23/2012


Response #2:In the summary on plan sheet DQ-7 (page 127 of 435), the 18" APC should have a sheet subtotal of 689.9'.
Response posted 10/24/2012


Response #3:See Addendum 1.
Response posted 11/20/2012




Inquiry #5: Lately, there are several Caltrans projects have been bided as “Minimum Working Days bid format”, instead of “Cost + Time Basis bid format”. Can Caltrans change the “Cost + Time Basis bid format” of this project to “Minimum Working Days bid format”?

Thanks,

Inquiry submitted 10/23/2012

Response #1:Submitted for consideration.
Response posted 10/24/2012


Response #2:Please bid per contract documents.
Response posted 10/24/2012




Inquiry #6: Bid Item #25 "Temp Pull Box Protection" - 58 each
1) Where are these located?
2) Why are we removing the top 1' and capping with asphalt?
3) Are these pull boxes being abamdoned?
4) Are they located in the exisitng concrete road section, the existing asphalt shoulders, or in the existing dirt shoulders?

Inquiry submitted 10/26/2012

Response #1:Submitted for consideration.
Response posted 10/29/2012


Response #2:1) These refer to the fiber optic pull boxes in the I-680 Median (See Q-4)


2) This is to protect the pull boxes when traffic is temporarily shifted in Stage in Stage 2.


3) No, they are not to be abandoned.


4) They are located in the existing asphalt median shoulder.

Response posted 10/31/2012




Inquiry #7: Please refer to plan sheet #195 (Q-3), Concrete Barriers Summary:
- The 4th line down Sta 266+24 to Sta 268+12 = 188 LF
- The quantity listed under the 60C barrier is only 132'

Inquiry submitted 10/29/2012

Response #1:Submitted for consideration.
Response posted 10/30/2012


Response #2:The quantity the 4th line down Sta 266+24 to Sta 268+12 under the 60C should be 188 LF.

Response posted 10/31/2012


Response #3:See Addendum 1.
Response posted 11/20/2012




Inquiry #8: Plan sheet 391 shows Z-2 excavation at RW 1D and plan sheet 428 shows Z-2 excavation at RW 5. No bid item exists for this material. Please clarify what level of contamination this excavated material has.


Inquiry submitted 11/01/2012

Response #1:Submitted for consideration.
Response posted 11/01/2012


Response #2:It should read as Structure Excavation (Type Y-1) (ADL) for both sheets 391 & 428
Response posted 11/05/2012


Response #3:See Addendum 1.
Response posted 11/20/2012




Inquiry #9: In response to Inquiry #6:
1) Are these pull boxes restored during the course of this project?
2) If they are to be retored how are they paid for?

Inquiry submitted 11/01/2012

Response #1:Submitted for consideration.
Response posted 11/01/2012


Response #2:1) Yes the pull boxes are to be restored this is only temporary protection while traffic is shifted over into the median.

2) This item is to be paid per each, and covers the installation and removal of the temporary protection as well as the reconstruction to the existing condition.
Response posted 11/05/2012


Response #3:See Addendum 1.
Response posted 11/20/2012




Inquiry #10: Typical Cross Sections X-1 (sheet no. 2), shows structural section 17 as having 0.20' FBARIC. What is FBARIC? I cannot find it referenced anywhere. Please Clarify.
Inquiry submitted 11/02/2012

Response #1:Submitted for consideration.
Response posted 11/05/2012


Response #2:It should say FABRIC.

Response posted 11/07/2012


Response #3:See Addendum 1.
Response posted 11/20/2012




Inquiry #11: My question is in regard to road sections "E" & "F" which are to be done in stage 2/2. Per the plans this work is to be done in an overnight closure. I do not believe that it will be possible to do the earthwork, subgrade prep, CL4 subbase, LCB and PCC paving in one 8 hour night shift.

This work will typically require the following time frame:
1) Earthwork and off-haul - 1 shift
2) Subgrade prep, supply/knockdown/finish CL4 subbase - 1 shift
3) LCB -1 shift
4) JPCP - 1 shift

At a minimum the work in road section "E" will require 4 shifts. The same is true for road section "F". We need to install k-rail along these areas and shut the on-ramps down for 1 week.

Inquiry submitted 11/02/2012

Response #1:Submitted for consideration.
Response posted 11/05/2012


Response #2:The work in this area is not intended to be done in one night. The intention is for this work to be done over several nights a few sections per night. See TH-16 - 21 for traffic handling. Also see the lane closure charts. The ramps are to remain open.
Response posted 11/13/2012




Inquiry #12: Please provide a detail for the 4" plastic pipe underdrain cleanouts located in the bio-swale. We need to determine how this relates to the 12"-24" slotted pipe in these locations.
Inquiry submitted 11/02/2012

Response #1:Submitted for consideration.
Response posted 11/05/2012


Response #2:See Addendum 1. GMP inlets are used as cleanouts.
Response posted 11/20/2012




Inquiry #13: Per Q&A #4 is the District going to adjust the bid quantity for the 18" APC?
Inquiry submitted 11/02/2012

Response #1:Submitted for consideration.
Response posted 11/05/2012


Response #2:Please refer to Section 9-1.05 "CHANGED QUANTITY PAYMENT ADJUSTMENTS" in the Amendments to the Standard Specifications.
Response posted 11/07/2012


Response #3:See Addendum 1.
Response posted 11/20/2012




Inquiry #14: Specification section 10-1.72 Slotted Corrugated Steel Pipe discusses heel guards to cover the slotted openings. Please clarify the specific drainage systems requiring this system.
Inquiry submitted 11/05/2012

Response #1:Submitted for consideration.
Response posted 11/07/2012


Response #2:See Addendum 1.
Response posted 11/20/2012




Inquiry #15: Can the State make available on-line the As-Built plans of the existing soundwalls instead of having to go to Oakland to inspect the plans?
Inquiry submitted 11/05/2012

Response #1:Submitted for consideration.
Response posted 11/07/2012


Response #2:You can download the files below:

www.dot.ca.gov/dist4/construction/contracts/04-2285H4/RehabFiles.zip

www.dot.ca.gov/dist4/construction/contracts/04-2285H4/AsBuilts.zip
Response posted 11/08/2012




Inquiry #16: On Oct 29 an inquiry was submitted that does not show up on the "Bidder Inquiry" list. It has to do with Bid Items 128 & 130 as well as DD4,5,6,7,8&9,"BIORETENTION SWALES. Describe in detail the type of perforations required for the 12" & 24" "Slotted CSP". It does not appear the traditional "Slotted Drain" such as bid item 129 would work in the "BOIRETENTION SWALE" application. Please advise what was intended for items 128 & 130.
Inquiry submitted 11/06/2012

Response #1:Submitted for consideration.
Response posted 11/07/2012


Response #2:See Addendum 1.
Response posted 11/20/2012




Inquiry #17: Section 10-1.63 makes reference to only curing architectural treatment with forms-in-place or water methods. Is this for the oak texture only (wall 2), or the fin texture (all walls)?


Inquiry submitted 11/07/2012

Response #1:Submitted for consideration.
Response posted 11/08/2012


Response #2:The curing in Section 10-1.63 should apply to all architectural treatments.
Response posted 11/27/2012




Inquiry #18: The "Seal Pavement Joint" item appears to be short quantity, more specifically the transverse joint footage. Please verify.
Inquiry submitted 11/07/2012

Response #1:Submitted for consideration.
Response posted 11/08/2012


Response #2: The Seal Pavement Joint did not previously include the traverse joints. When added in the Seal Pavement joint quantity should be 54670 LF.
Response posted 11/13/2012


Response #3:See Addendum 1.
Response posted 11/20/2012




Inquiry #19: Please clarify that in 10-1.19 Maintaining Traffic the "white squares" in the lane closure charts, mean no lane or shoulder closures are allowed. Also that this when combined with "When work vehicles or equipment are parked within 6 feet or a traffic lane to preform active construction, the shoulder area shall be closed as shown on the plans."~also from 10-1.19. Forbids Lane or shoulder closures outside the night work hours. We would like this clarified due to the huge variance between what some contractors are allowed to do during heavy public traffic travel times.
Inquiry submitted 11/12/2012

Response #1:Submitted for consideration.
Response posted 11/13/2012


Response #2:Contractor should bid per contract documents.
Response posted 11/27/2012




Inquiry #20: 10-1.55 Jointed Plain Concrete Pavement Rapid Strength Concrete needs to be excluded from the requirements of 40-3.15 Protecting Concrete Pavement to be construct-able per the plans provided by the State.
Inquiry submitted 11/12/2012

Response #1:Submitted for consideration.
Response posted 11/13/2012


Response #2:An addendum has been requested to exclude 10-1.55 Jointed Plain Concrete Pavement Rapid Strength Concrete from the requirements of 40-3.15 Protecting Concrete Pavement.
Response posted 11/14/2012




Inquiry #21: 10-1.52 Lean Concrete Base Rapid Setting - Construction - General - Please re-examine the strengths and limits proposed, please more clearly define "operating equipment on it".


Inquiry submitted 11/12/2012

Response #1:Submitted for consideration.
Response posted 11/13/2012


Response #2:Strengths and limits are as defined on the advertised documents.
Response posted 11/14/2012




Inquiry #22: For Structural Section E and F - Would the state allow and consider thickening the LCB-RS Section to eliminate all of the new sub base class 4 material? It would greatly reduce the complexity in building these sections under nightly lane closure. Resulting new sections would be(starting at the bottom) TSS-E = 1.7ft LCB-RS, Bond Breaker, 1.05ft JPCP-RSC & TSS-F = 1.05ft LCB-RS, Bond Breaker, 1.05ft JPCP-RSC.
Inquiry submitted 11/12/2012

Response #1:Submitted for consideration.
Response posted 11/13/2012


Response #2:No. Due to the soil property at structural section E and F, a thicker LCB-RS section to eliminate all the new sub base materials is not recommended.
Response posted 11/14/2012




Inquiry #23: Please clarify how to determine total working days to bid relative to the working days specified for plant maintenance prior to contract acceptance as specified in Section 10-2.04 of the Special Provisions.
Inquiry submitted 11/13/2012

Response #1:Submitted for consideration.
Response posted 11/13/2012


Response #2:The time required for maintenance of liner plants shall be considered as included in the total time limit specified for the contract.
Response posted 11/16/2012




Inquiry #24: There is no bid item for the soundwall mounted signs shown on SD-7 Sheet #213. Please advise. Thank You.
Inquiry submitted 11/13/2012

Response #1:Sound wall mounted signs are paid for as part of “Misc Iron & Steel” quantities as shown on the Sign Quantities Sheets.
Response posted 11/14/2012




Inquiry #25: As shown on the Stage Construction Drawing SC-1, Existing soundwalls are to remain in place, while the new ones are built behind them. This is what was supposed to happen on a previous job which had the same notes, yet the contractor was allowed to remove the existing, prior to new being built. Is this going to be allowed on this project?
Inquiry submitted 11/15/2012

Response #1:Submitted for consideration.
Response posted 11/16/2012


Response #2: Contractor should bid per contract documents. Except as indicated in section 10-1.01 “Order of Work” and on the plans, sound walls are to remain in place until new sound walls are constructed.
Response posted 11/20/2012




Inquiry #26: Please clarify if the contractor will be required to install dowel bars in the transvers joints in the shoulder areas. RSP P1 says that dowel bars maybe omitted from shoulders when the shoulder cross slope is not the same as the adjacent traffic. I understand that, but this pavement will never be a lane of traffic due to the proximity of the walls. Thank You.
Inquiry submitted 11/16/2012

Response #1:Submitted for consideration.
Response posted 11/20/2012


Response #2:Bidder should bid per advertised contract documents.
Response posted 11/26/2012




Inquiry #27: Addendum #1 plan sheet DQ-8; Bioretention swale quantities added two sections DI (Type GMP) and 36" Corrigated Steel Pipe. The 4" plastic Cleanouts were deleted from this summary but no changes were made to the Estimate Sheet. How is this addition paid for under the bid sheet.
Inquiry submitted 11/19/2012

Response #1:Submitted for consideration.
Response posted 11/20/2012


Response #2:The new GMP inlets added 3540 lbs. to the Misc. Iron and Steel quantity, so the new quantity for Misc. Iron and Steel is 37536 lbs. With the additional 36” CSP at the bioswales, the new quantity for 36” CSP is 108 LF.

Response posted 11/20/2012




Inquiry #28: Section 10-1.79 Chain Link Fence, paragraph two states "attention is directed to the 'Miscellaneous Metal (Retaining Wall)' of these Special Provisions for anchoring chain link fence to the existing retaining wall." I do not see this referenced section in the Special Provisions.

Please provide the section for Miscellaneous Metal (Retaining Wall) for us to review.

Inquiry submitted 11/19/2012

Response #1:Submitted for consideration.
Response posted 11/26/2012


Response #2:The clause "attention is directed to the 'Miscellaneous Metal (Retaining Wall)' of these Special Provisions for anchoring chain link fence to the existing retaining wall." should be deleted.
Response posted 11/26/2012




Inquiry #29: Per Q&A #27 is Cal-Trans going to issue an addendum to modify the bid quantity sheet??
Inquiry submitted 11/26/2012

Response #1:The quantities in sheet DQ-8 in Addendum 1 are correct. This is not reflected in the Bid Item List of Addendum 1. It's too late to issue another addendum.
Response posted 11/27/2012




Inquiry #30: Conflicting Joint Seal materials in 10-1.54 JPCP page 159.
Isolation joints - compression or silicone? Can't be both.


Inquiry submitted 11/26/2012

Response #1:Submitted for consideration.
Response posted 11/27/2012


Response #2:The liquid joint sealant for isolation joints must be silicone.
Response posted 11/27/2012






The information provided in the responses to bidder inquiries is not a waiver of Section 2-1.03, “Examination of Plans, Specifications, Contract, and Site of Work,” of the Standard Specifications or any other provision of the contract, nor to excuse the contractor from full compliance with the contract. Bidders are cautioned that subsequent responses or contract addenda may change a previous response.