BIDDER'S INQUIRIES & RESPONSES
DISTRICT 11 CONSTRUCTION

 
CONTRACT NO: 11-2T0924
ROUTE / KP 11-SD-15 ,163 -R16.7/M34.1E16.1/R18.8
LOCATION In San Diego County In San Diego On Route 15 From 0.3 Km South Of Route 52/15 Separation To 1.0 Km North Of Carmel Mountain Road Overcrossing And On Route 163 From 0.6 Km North Of Route 163/52 Separation To Route 163/15 Separation.
DESCRIPTION To Construct The Managed Lanes - South Segment, Unit 2.
ESTIMATE $ 75,000,000
WORKING DAYS

900

ADVERTISE DATE 04/14/2008
BID OPENING 06/12/2008  07/10/2008
FINAL POSTING
07/09/08   @   1515

BID RESULTS

The Caltrans District 11 Office is located at 4050 Taylor Street, San Diego, CA 92110. The District 11 Duty Senior telephone number is (619) 688-6635. Please submit all inquiries in the proper format by fax to (619) 688-6988 or e-mail to:
Duty_Senior_Const_District11@dot.ca.gov.
The responses to bidder' inquiries, unless incorporated into a formal addenda 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 responses may be considered along with all other information furnished to prospective bidders for the purpose of bidding on the project. The availability or use of information provided in the responses to bidder' 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.
Caltrans District 11 Construction Department has developed this method of answering Bidder's Inquiries to better serve the needs of the Contractors who bid on our Projects. Caltrans District 11 Construction Department will post all of the questions submitted by any of the contractors that are registered Planholders for that Contract, but reserves the right to not answer any questions deemed unsatisfactory for public viewing.
The BIDDER'S INQUIRIES & RESPONSES will be updated continuously and all attempts will be made to do the final posting by 15:00 on Wednesday prior to the bid opening.
INFORMATION AVAILABLE

X-SECTIONS
4/25/08

BID ITEMS
 SPECIALS
PLANS
 PLANHOLDERS
ADDITIONAL X-SECTIONS
05/19/08



ADDENDUM


 ADDENDUM #3
Posted  06/27/08
 

BIDDER'S INQUIRY SUBMITTAL FORM


Inquiry No.
Inquiry
    1 

   Q:04/17/08
   R:04/25/08

Plan Sheet / Specification Reference= Special Provision Section 5-1.17 Project Information

Question=Special Provision Section 5-1.17 Project Information page 159, states that cross sections are available in electronic copy. When will the cross sections be available for download and use.

  • Cross sections are available as of 04/25/08 and can be downloaded for printing from the link above at any local printing firm or on your own printing equipment:

     MESA REPROGRAPHICS 
     5560 Ruffin Road Suite 5 
     San Diego, CA 92123 
     (858) 541-1500    FAX (858) 278-0558 
     e-mail to  plot@mesareprographics.com San Diego, CA 92123

    2 

   Q:04/30/08
   R:05/05/08

Plan Sheet / Specification Reference= 

Question= Stage Construction Plans - Stage 5B, Sheets SC-78 and SC-79.  There appears to be missing sheets as the stationing on SC-78 ends @ approx Sta 250 but starts @ approximately Sta 275 on Sheet SC-79.  The quantity sheets indicate the easterly K-Rail runs continuously through the missing sheets/stations.  Please confirm.

  • Easterly K-Rail does run continuously between stations 249+80 "SD-15M" and 274+60 "SD-15M" and quantities are correct.  For K-rail placement in this area please refer to Section A-A on sheet SC78

    3 

   Q:05/06/08
   R:05/19/08

Plan Sheet / Specification Reference= Summary of Quantities, Drawing Q-2, Sheet No. 566

Question= The Earthwork Summary list 19 locations for excavation and embankment volumes. The provided electronic cross sections on your website covers only 11 of these locations. Please provide cross sections for the following locations:

SD-15B Line Sta. 193+30.000 to Sta. 194+81.576
ML-1 Line Sta. 194+55.987 to Sta. 203+94.339
SD-15R Line Sta. 194+81.574 to Sta. 195+24.000
SD-15L Line Sta. 194+81.574 to Sta. 195+90.964
HVRA Line Sta. 195+24.000 to Sta. 198+75.183
SR2A Line Sta. 201+30.661 to Sta. 202+20.000
DR17A Line Sta. 264+20 to Sta. 268+00.000
C10 Line Sta. 201+30.000 to Sta. 201+50.000

  • Please refer to the link for ADDITIONAL X-Sections posted above.

    4 

   Q:06/04/08
   R:06/09/08

Plan Sheet / Specification Reference= 2-1.02A DVBE GOAL FOR THIS PROJECT (5%)

Question= Does the DVBE goal of 5% include an incentive? If so, what is the incentive percentage? If not, what is the reason for not including it?

  • Yes, there is an incentive for DBVE, see Section 2-1.05.

    5 

   Q:06/09/08
   R:06/17/08

Plan Sheet / Specification Reference= LIGHTING AND SIGN ILLUMINATION, TEMPORARY LIGHTING

Question= ELECTRICAL PLANS ON E-65, E-66 DOES NOT SHOW ANY NEW POLES, ONLY TEMPORARY POLES,IS THIS CORRECT?
RUN(DELTA)#7 IS ON E-65(loop on ramp s/b), WHAT KIND OF CONDUIT IS RUN #7 AND HOW MANY WIRES? 

  • POLE DESCRIPTIONS AND QUANTITIES ARE INCLUDED IN COST BREAKDOWNS PER SPECIAL PROVISIONS SECTION 10-3.02 "COST BREAK-DOWN" - TABLE 1 - PAGE 399
  • PER SPECIAL PROVISIONS, FINAL ELECTRICAL PLANS WILL BE INCLUDED AS PART OF THE PHASE III DELIVERY. BID PER INFORMATION INCLUDED IN BID PACKAGE

    6 

   Q:06/16/08
   R:06/23/08

Plan Sheet / Specification Reference= 249(S) 860798 Booster Pump Electrical system,  10-3.37

Question= Where does this system show up on the drawings?

  • Booster Pump (BP) location is shown on sheet IP-7. Booster Pump Detail sheets will be included as part of the Phase II delivery. Bid per description included in Special Provisions Section 10-3.37

    7 

   Q:06/19/08
   R:06/24/08

Plan Sheet / Specification Reference= Section 10-4.5 Welded Steel Pipe, page 490
Re: Hydrostatic Testing: “While under this pressure, the pipe shall be sharply struck at 150 mm intervals along the weld…..”

Question= We strongly urge to remove this requirement because it will put the life of workers in jeopardy
It is Northwest Pipe internal policy that during the pressure testing the employees not to walk next to or inspect pipe . Please consult OSHA regulations and advise.

  • Hydrostatic testing of pipe shall be per  AWWA C200; Section 5.2 "Test Procedures" requirements.

    8 

   Q:06/19/08
   R:06/24/08

Plan Sheet / Specification Reference= Section 10-4.5 Welded Steel Pipe, page 490
Re: “Maximum pipe lengths shall be 9 meters unless spreader beams are used in lifting the pipe sections”  

Question= Are we allowed at the manufacturing facility to handle the pipes larger than 9 meters with the forklift?
It is impractical to use a spreader bar to move the pipe around the manufacturing facility and in your specification it is unclear to where spreader bars to be used

  • The requirement to use a spreader beam  for pipe sections 9 meters or longer applies to pipe handling and installation during construction, not for pipe handling during pipe fabrication.

    9 

   Q:06/19/08
   R:06/24/08

Plan Sheet / Specification Reference= Section 10-4.88 Pipe Preparation, page 504
Re: “Omit cement mortar coat for steel pipe to be installed inside bridge girder”

Question= We are asking to change the bare tapewrap coating with polyurethane paint per AWWA C222 standard.
We do not recommend bare tapewrap inside bridge girder. The tape will be destroyed during installation.

  • Bid as per special provisions and plans included in Bid Set Package

    10 

   Q:06/19/08
   R:06/24/08

Plan Sheet / Specification Reference= Section 10-4.55 Pipe Preparation, page 491

Question= We do not recommend field lining of the 400 mm steel pipe.
Please review and advise.

  • Bid as per special provisions and plans included in Bid Set Package

    11 

   Q:06/19/08
   R:06/24/08

Plan Sheet / Specification Reference= Re: Drawing UD-8 Detail 3 shows welded wire fabric as reinforcement for cement mortar lining

Question= Please allow spiral wire as reinforcement for the straight lengths of pipe as allowed on AWWA C205 paragraph 4.5.5.1.
Pieces of wire fabric are used for reinforcement only for fittings, when spiral ribbon wire can not be applied.
It is impossible to bend the fabric on diameters smaller than 600 mm and for 900 mm diameters is impossible to have it centered on the 32mm of coating.

  • Welded wire fabric reinforcement or continuous wire reinforcement per AWWA C205 is acceptable for this project.

    12 

   Q:06/24/08
   R:07/03/08

Plan Sheet / Specification Reference= Cement Mortar Thickness for welded steel pipe: Specification book page 504 & page 501 require 25.4mm and Specification book page 491 and Dwg UD-8 require 32mm

Question= Please clarify the thickness for Cement Mortar Coating required on the welded steel pipe.

  • Cement-Mortar coatings shall be applied as per bid documents according to size of pipe and surface to be applied on. 

    13 

   Q:06/26/08
   R:07/03/08

Plan Sheet / Specification Reference= This project was scheduled to bid June 12, 2008.  Addendum #1 was issued May 14, 2008 in which the bid date was postponed until July 10, 2008 for no apparent reason.  Today,
we received Addendum #2 with changed specification sheets approximately one inch thick and changed plan sheets about one half inch thick, WITH NO CHANGE IN BID DATE! 

Question= If you can issue an addendum on May 14, 2008 giving the Caltrans TWO MONTHS to make any changes that were desired, how can you issue a major addendum that adds to, and changes the scope of work and allow the bidding contractors barely TWO WEEKS to analyze these changes before the bid date?  This is basically a five year job, that cannot be awarded until the state budget is approved (sometime in August, we understand) so what is the point in rushing the bidding preparation process?  WE REQUEST A POSTPONEMENT OF THE BID DATE OF AT LEAST TWO WEEKS!

  • Bid as per plans, special provisions, and addendums provided with the bid package.

    14 

   Q:06/30/08
   R:07/01/08

Plan Sheet / Specification Reference= Item #211

Question= Can the SCI100GM (Smart Cushion) be used instead of the React 9CBB? Can it be bid as an equal, or will it be expected as a post bid C.R.I.P. ?

  • No, crash cushions may not be substituted.  Bid as per information provided with bid package.
    15 

   Q:07/01/08
   R:07/08/08

Plan Sheet / Specification Reference= B.I.#109, 1.5M CIDH Conc. Piles @ Carroll CYn. Rd. OC. 

Question= Current satging in conctract documents have very restricted access for work to be performed in Stage 2A & 2B for Abutment 1 work.  What is the allowable equipment loads that would be acceptable for palcing equipment on the Carroll Canyon Bridge deck for Abutment #1 work, prior to the removal of that section of existing bridge?

  • Refer to the Standard Specifications, Section 51 "Concrete Structures," subsection 51-1.11 "Construction Methods"
      
    16 

  Q:07/02/08
R:07/03/08
R:07/07/08
R:07/07/08

Plan Sheet / Specification Reference= Item 91, HOT MIX ASPHALT, Section 10-1.51, MATERIALS, Third paragraph.

Question= Section 10-1.51, Materials, Third paragraph, reads "The aggregate for HMA Type A must comply with the 12.5 mm grading".  Is the 12.5 mm aggregate to be used for all HMA Asphalt as it reads, or only for the mix to be used for the dike?  Please clarify if this should read 19 mm aggregate
for HMA Type A, except HMA to be used for dikes.

  • Section 10-1.51 Hot Mix Asphalt, MATERIALS, third paragraph shall read:  "The aggregate for HMA Type A must comply with the 19 mm grading." 
  • Section 10-1.51 Hot Mix Asphalt, MATERIALS, third paragraph shall read:  "The aggregate for HMA Type A must comply with the 19 mm grading."
    A Contract Change Order will be issued for this change to the special provisions.

  • Please bid per the current contract documents.

    17 

   Q:07/02/08
   R:07/09/08

Plan Sheet / Specification Reference= Item # 161, 600MM Alternative Pipe Culvert. Plan sheet # 187 & # 226

Question= How does the State propose the contractor install "element a" of Drainage unit #22 accross 4 lanes of live freeway traffic 2.4 meters deep without diverting traffic off of the work area for a prescribed amount of time or specifying some sort of Bore? Please give us some incite into what the designer may have had in mind for this work. You have designed this element to be Alt. Pipe. Are you sure you want to allow plastic pipe in this configuration. 

  • Per Plan Sheet DQ-1 (Sheet No. 249) "ALTERNATIVE PIPE - ALLOWABLE PIPE MATERIAL & PROTECTION" Table, only RCP may be used under traveled way. Bid as per current contract documents.
    18 

   Q:07/03/08
   R:07/08/08

Plan Sheet / Specification Reference= Item #68, Structure Backfill (Soldier Pile Wall), Special Provision Section 10.137(pg279) and plan sheet 865.

Question= Plan sheet 865 exhibits limits of payment for structure backfill (SP Wall) above and in front of lagging.  The specials state that structure backfill (SP Wall) is behind lagging.  Please clarify limits of structure backfill with respect to lagging.  Is drainage behind lagging paid under item 68, 158 or other (see specials section 10.137 "measurement and payment")?

  • Refer to the Special Provisions, Section 10-1.37, "Earthwork," subsection "Measurement and Payment."
    For payment of structure backfill, refer to the first paragraph:  
    "If structure excavation or structure backfill for bridges is not otherwise designated by type and payment for the structure excavation or structure backfill has not otherwise been provided for in the Standard Specifications or these special provisions, the structure excavation or structure backfill will be measured and paid for as structure excavation (bridge) or structure backfill (bridge), respectively."

    For payment of the geocomposite drain, refer to the last paragraph:
    "Except for structure approach slabs, full compensation for geocomposite drain, including, filter fabric, treated permeable base, and plastic pipe, shall be considered as included in the contract price paid for the various types of structure backfill involved and no additional compensation will be allowed therefor."

    19 

   Q:07/03/08
   R:07/09/08

Plan Sheet / Specification Reference= Sheet X-9 of Addendum 2, SD-15M Line

Question= Sheet X-9 of Addendum 2 added 45mm cold plane/45mm HMA-A overlay on the 56SON and SD-15M Lines from Sta 315+40 to 320+25.  Please clarify the following in regards to this added work:
1.  Which lane closure chart is to be used for this work?
2.  In which stage is this work to be perfomed?

  • Lane Closure Charts are provided in the Special Provisions for the closure of HOV and Managed Lanes.
    As per Addendum #2 Order of Work, this work shall be completed prior to installing guide wire for the movable barrier. Bid as per current contract documents.

    (Please note typo on Addendum #2 write up within Order of Work Section, it reads "guide qire" instead it should read "guide wire")
         
    20 

   Q:07/07/08
   R:07/09/08

Plan Sheet / Specification Reference= Addenda #2, Page #56 (CHART) REDUCED PAYMENT FACTORS FOR PERCENT OF MAXIMUM THEORETICAL DENSITY

Question= Could you please clarify, and or explain, the chart on Page 56 of Addenda #2.  It appears, according to your chart, that the contractor will receive "Reduced Payment" by achieving maximum in-place asphalt densities greater than 97%.

Also, what happens to payment factors when in-place asphalt densities fall between 91.1% and 96.9% of maximum theoretical density?

Should there not be a bonus payment, for densities achieved above the minimum reduced payment requirements, since there is a penalty for not achieving the minimums?

  • Please refer to Section 10-1.51 "Hot Mix Asphalt" (Pg 299) of the Special Provisions, and Addendum #2 Section 39 "Hot Mix Asphalt".
           
    21 

   Q:07/07/08
   R:07/08/08

Plan Sheet / Specification Reference= 136, Bar Reinforcing Steel (Retaining Wall)

Question= Please clarify what Bid Item 136 applies to.  Does it apply to the shotcrete facing over the 1.5 M CIDH at Abutment 1 of Carroll Canyon Rd., the initial shotcrete facing on RW 250L or both?

  • No additional information will be provided.  Bid per the current contract bid documents.
    22 

   Q:07/07/08
   R:07/09/08

Plan Sheet / Specification Reference= You did not answer to question # 12 submitted on 06/24/08.
The thickness on the drawing UD-8, detail 3 (32mm) conflicts with Specification 10-4.87 (25.4mm)

Question= What is the thickness of cement mortar coating over the tape wrapped pipe?
Is 24.8mm or 32mm? Drawing UD-8, detail 3 shows 32mm and Specification 10-4.87 asks for 25.4mm

  • Refer to Special Provisions Section 10-4 "Relocation of Utility Facilities."    

OTHER LINKS OF INTEREST

DISTRICT 11 CONSTRUCTION BIDDER'S INQUIRIES & RESPONSES
DISTRICT 11 HOMEPAGE
CALTRANS OFFICE ENGINEER: Contract Advertisement, Special Provisions, Plan Holders, Contract Awards, etc.
DEPARTMENT OF TRANSPORTATION