BIDDER'S INQUIRIES & RESPONSES
DISTRICT 11 CONSTRUCTION

 
CONTRACT NO: 11-2T0814
ROUTE / KP 11-SD-15-M41.8/R48.6
LOCATION In San Diego County In And Near Escondido At Various Locations From 0.1 Km South Of Highland Road Overcrossing To 0.2 Km North Of Ninth Avenue Undercrossing
DESCRIPTION To Construct Managed Lanes - North Segment
ESTIMATE $ 57,000,000
WORKING DAYS

900

ADVERTISE DATE 07/21/2008
BID OPENING 09/18/2008     10/16/2008     10/23/2008
FINAL POSTING
10/22/08   @   1510

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
07/23/08

BID ITEMS
 SPECIALS
PLANS
 PLANHOLDERS


ORDERING PROJECT PLANS AND SPECIFICATIONS

ADDENDUM


 

BIDDER'S INQUIRY SUBMITTAL FORM


Inquiry No.
Inquiry
    1 

   Q:07/22/08
   R:07/23/08

Plan Sheet / Specification Reference= Special Provisions Section 5-1.06 Project Information

Question= When will the electronic cross sections be available to download for our use?

  • Cross sections are available as of 07/23/08 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:07/30/08
   R:08/13/08

Plan Sheet / Specification Reference= 243(s) - 246(s), 249(s) - 250(s), 252(s) - 258(s) and 260(s) Jacking/Drilling operations.

Question= 1)  For the 2" and 3" Drilling installations, are you calling for
Type 1 or Type 3 conduit.  For future reference, where and how is this made
clear in the plans and specifications.

  • The conduit is type 3 as stated on page 273 under "CONDUIT".

2)Are the MDCS ducts to be installed within casing?  If so, what type?

  • It will depend on the type of Jacking/Drilling method the contractor chooses to use. On page 278 directional boring is an option of drilling/jacking which does not use casing.

3)Where is MVDS defined in the specs and what type of conduit is this calling for?

  • On page 260, MVDS is not conduit type. It's a vehicle detection system see page 307 for specifications.

4)How are the individual drilling locations delineated on the plan sheets? I am not seeing them.

  • The Electrical Plans are not complete until phase 2 submittal. Please see page 259 which states "The following are the quantity break-down for the contract lump sum items of signals, lighting, and electrical systems. The quantity break-down are included in these special provisions for the contractor to use for bidding purposes in the absence of signed electrical plans".

    3 

   Q:08/14/08
   R:10/06/08

Plan Sheet / Specification Reference= Staging for Southbound 15L1 line Sta 488+20 to 489+00 and for R4NA Ramp, right side.

Question= Please clarify in which Stage the section on Southbound 15L1 from 488+20 to 489+00 and for Right Side of R4NA Ramp.  It appears traffic is kept on existing ramp through Stage 4, but I don't see the stage to remove the existing ramp and complete right side of ramp and sectin on 15L1.

  • Please refer to the revised staging sheet in Addendum No. 2.

    4 

   Q:08/14/08
   R:10/14/08

Plan Sheet / Specification Reference= Bid Itme #108, 750mm CIDH pile rebar cages. Sheet 673 of 796 in the contract plans.  Abutment details No. 4.

Question= Hoop spacing for CIDH pile reabr cages does not met your current 1992 design memo requirements for distance between reinforcing steel.  The minimum states 5" x 5" windows.  With your hoops currently show @ 75mm (3") the actual distance between the rebar will be 2 1/2 ".

  • Sheet 673 of  796 has been changed, refer to addendum # 2 dated October 3,2008.

    5 

   Q:08/21/08
   R:10/06/08

Plan Sheet / Specification Reference= Bid Item 134, Masonry Sound Walls Sheets 430-434

Question= On sheet 434 it shows the horizontal steel to be 600mm or 2 ft. on centers, but on sheet 430 on the typical section it points to the wall and references B15-1 on the Standard Plans which shows the horizontal steel to be 4 ft. on centers, which has been the case on all state projects to date. Does the State want the steel on 2ft. center or 4ft? If 2 fts is required then would it be possible to grout the wall solid in order to save time and labor from stopping every 2 ft to grout? the cost of the additional grout (25%) would be cheaper that the labor.

  • Please see the revised sheet 434 in addendum No. 2.  The spacing of the horizontal #13 bars has been changed to 1219mm.

    6 

   Q:08/21/08
   R:10/06/08

Plan Sheet / Specification Reference= Bid Item 134, Masonry Sound Walls Sheets 430-434

Question= There seems to be some kind of pattern or design attached the walls that is not shown on the Details sheet 434. Can you please clarify what this is?

  • Please see the revised sheet 434 in addendum No. 2.  The hatching shown in the "partial elevation view" has been revised to clarify the block pattern.

    7 

   Q:08/26/08
   R:10/06/08

Plan Sheet / Specification Reference= Bid Item 112, 400MM CIDH Pile (Sound Wall)

Question= What soil friction angle is to be used to determine pile length and spacing?

  • Please refer to Addendum No. 2.  Foundation Recommendations for the sound walls have been added to the information handout.

 

 

8  

   Q:09/05/08
  R:10/15/08


Plan Sheet / Specification Reference=

Question= What is the requirement for constructing CIDH piles with less than 3 diameters center to center
spacing?
The Addendum to the Foundation Report for 9th Ave. UC (Widen) dated 10/3/07 states "Within a support location, no piles shall be constructed (i.e. concrete poured) immediately adjacent to recently constructed piles until the adjacent (recently constructed) CIDH piles have cured for a
minimum period of 48 hours."

  • Please refer to addendum 3.
 

   9

   Q:09/12/08
  R:09/12/08


Plan Sheet / Specification Reference=

Question= In the Notice to Bidders, the telephone number (916) 654-4990 is for another state agency.  Can the correct telephone number be provided to where the Bid Documents may be viewed.

  • The correct Department.of Transportation Bid Documents contact telephone number is (916) 654-4490.  We apologize for any inconvenience.

    10 

   Q:09/22/08
   R:10/06/08

Plan Sheet / Specification Reference= Item # 86   50 mm Water meter
Item # 87   75 MM Water Meter

Question= There are no specifications as to what water district these in and will there be a specifications for these line items or an estimated cost for them provided?

  • Please refer to addendum No. 2.  In the Special Provisions, Section 10-2.05, "IRRIGATION SYSTEMS," the subsection "WATER METER," is added.

    11 

   Q:09/22/08
   R:09/24/08

Plan Sheet / Specification Reference= Cross sections

Question= Where can I find the cross section for “R-3CA” Line? (Citracado Parkway N/B Off Ramp). The cross section for the subject line is not posted on the internet.

  • Cross sections are available as of 07/23/08 and can be downloaded for printing from the link above.  The "R-3CA" line is in the file named "R3CA1_08063.pdf".

    12 

   Q:09/25/08
   R:10/02/08

Plan Sheet / Specification Reference= TRANSITION BARRIER ON C-10, C-17, C-18, C-19... NO METHOD OF PAY EXISTS.


Question=
TRANSITION BARRIER ON C-10, C-17, C-18, C-19... "NO METHOD OF PAY EXISTS"

HOW ARE THE TRANSITIONAL CONCRETE BARRIERS PAID FOR?

BI NO. 219 PAYS FOR CB60 AR
BI NO. 220 PAYS FOR CB60 MOD
BI NO. 221 PAYS FOR CB60
BI NO. 222 PAYS FOR CB60 C
BI NO. 223 PAYS FOR CB60 E
BI NO. 224 PAYS FOR CB60 G MOD

HOW ARE THE REFERENCED TRANSITIONAL CONCRETE BARRIERS PAID FOR...IF THEY SHOULD BE PAID IN BI 219 - 224 PLEASE DETAIL WHICH BID ITEM.

  • Payment for Concrete Barrier Transitions are included in the unit price of the various concrete barriers.  Refer to the Layout sheets and the Quantity sheet for the limits of payment for each concrete barrier.

    13 

   Q:09/25/08
   R:09/29/08

Plan Sheet / Specification Reference= BID ITEM 219, CB 60AR... 

Question= WHERE IS THIS BARRIER LOCATED?

  • The concrete barrier type 60AR (MOD) is located at Ninth Avenue, details are shown on plan sheet 783 of 796, "Typical Section No. 2."  

WHAT STANDARD SHOULD BE USED FOR 60"AR"?

  • Section 10-1.100 "Concrete Barrier," page 240 in the special provisions covers the requirements for concrete barrier.  

    14 

   Q:09/25/08
   R:10/06/08

Plan Sheet / Specification Reference= PLAN SHEET C-19....CONCRETE BARRIER 60"R1"

Question= WHAT BID ITEM PAYS FOR CONCRETE BARRIER 60R1 ???

  • Please refer to Addendum No. 2.  Item #268 "CONCRETE BARRIER (TYPE 60R1)" has been added.

    15 

   Q:09/25/08
   R:10/02/08

Plan Sheet / Specification Reference= Item 247, Changeable Message Sign

Question= Bid item 247, Changeable Message Sign System has no plan or material sheet in the specs.  There is no way to estimate the item. Please clarify.

  • Bid item 247 (Changeable Message Sign) is covered by our SSPs. The contractor will use the cost breakdown table shown on page 271 to complete their bidding as stated on page 259.

    16 

   Q:09/25/08
   R:09/25/08

Plan Sheet / Specification Reference= X-SECTION SHEETS

Question= WHERE CAN I FIND THE X-SECTION FOR THE CITRACADO OFF RAMP? I HAVE ASKED THIS QUESTION BEFORE BUT I WAS REFERED TO CROSS SECTION FOR CITRACADO ON RAMP.

  • The "R-3CA" line is the file named "R3CA1_080603.pdf".  For the ramp gores please refer to the mainline cross sections.  "R-3CA" from 469+65.337 to 470+47.663 is in the file named "(north)45632 to 47300_SD15R1_080612.pdf"

    17 

   Q:09/29/08
   R:10/06/08

Plan Sheet / Specification Reference= The following bid items share the same discription:

BI 225 & 229 - concerte barrier (type 736 Mod)
BI 253 & 254 - temp closed circut television

Question= What dose each bid item scope include or cover...?

  • Bid Item 229 is the CB (type 736A Mod) in bridge items, and Bid Item 225 is the CB (Type 736A Mod) in the roadway items.  BI 229 is Final Pay, and 225 is not.
  • Please refer to Addendum No. 2.  The temp closed circuit television items have been changed to specify (Location 1), and (Location 2).

    18 

   Q:09/29/08
   R:10/06/08

Plan Sheet / Specification Reference= Items 213,214

Question= Information for above items could not be found in the special provisions. Will this be added? Please advise

  • Please see Addendum No. 2.  In the Special Provisions, Section 10-1.98, "METAL BEAM GUARD RAILING," subsection "ALTERNATIVE
    CRASH CUSHION SYSTEM," and subsection "TERMINAL SYSTEM (TYPE CAT)," are added.

    19 

  Q:10/01/08
 R:10/07/08
 R:10/15/08

Plan Sheet / Specification Reference= 183 JACKIGN 900 MM WSP (50 MM THICK)

Question= The jacking subs are questining the thickness of the pipe. According to them, in most cases for Caltrans project the specified thickness is around (15mm) 1/2 ". Is 50 mm the correct thickness?

  • Please bid per the current contract documents. 
  • Please refer to addendum 3.  Engineer’s Estimate Item 183, the description is revised as follows: "JACKED 900 MM WELDED STEEL PIPE (15 MM THICK)"

    20 

   Q:10/07/08
   R:10/14/08

Plan Sheet / Specification Reference= DD 21 Low Clearence Culvert Details

Question= Can an optional construction joint be installed at top of pipe?

  • Per sheet 173 the concrete backfill is a monolithic pour.

    21 

   Q:10/09/08
   R:10/14/08

Plan Sheet / Specification Reference= Items # 74, 78, 83 and 84 as per revised bid form per addenda 2 issuance. SP Section 10-2.01, Highway Planting and Irrigation Cost Breakdown example schedules as shown per addenda 2 issuance and as per original SP issued, Section 10-2.01 page 244 through 246. Highway planting sheets PP-12, PP-13, and IP-16 (plan sheets 516, 517, and 533).

Question= The previous noted addenda 2 cost breakdown schedule examples are different from the original examples as isssued in the initial set of Special Provision. But addenda 2 does not make any mention of plan sheet changes or elimnation of what is shown on those plan sheets.

Are we to assume that any item that was on the original Cost schedule breakdown example which does not now show on the revised schedule as per addenda 2 has been in fact eliminated from the current project?

  • Please refer to Addenda 2, "Project Plan Sheets 28, 29, 85, 125, 126, 516, 517, and 533 are deleted."

    22 

   Q:10/09/08
   R:10/15/08

Plan Sheet / Specification Reference= 

Question= I know I have asked the question before, but the jacking subs are still insisting that the 2-inch casing is too big and it should be half inches thick. They site past Caltrans project with similar situation. We will bid it as 50 mm thick casing. But it is going to very expensive. Can you check and make sure that the designers did not make a clerical mistake? 
 
Thank you,

  • Please refer to addendum 3.  Engineer’s Estimate Item 183, the description is revised as follows: "JACKED 900 MM WELDED STEEL PIPE (15 MM THICK)"

    23 

   Q:10/09/08
   R:10/14/08

Plan Sheet / Specification Reference= #49, Remove Concrete (Ditch), G-10 to G-13

Question= There is an existing concrete channel that runs on the west side of the South Bound Lanes from Sta 481+00 - 489+82 (+/-).  Drainage System(DS)-13 is in line with the concrete channel.  The concrete channel will need to be removed in order to complete DS-13.  What bid item will this work be paid under?

  • If the concrete channel is within the limits of roadway excavation it is included in the unit price for roadway excavation.  If it is within the trenching limits for the drainage unit it is included in the unit price of the various bid items for drainage pipe. 

    24 

   Q:10/10/08
   R:10/14/08

Plan Sheet / Specification Reference= Items 100, 96, 93 Plan sheet 3,4,5,6

Question= The designed pavement grade break at the ETW, .6 meters from the a/c shoulder, is not an industry standard practice. This design causes constructiblity issues at all levels of the pavement section. Industry standard equipment cannot put a break that close to an edge. Will Caltrans consider moving the grade break to the joint between AC and PCC?

  • Please bid per the current contract documents.

    25 

   Q:10/14/08
   R:10/14/08

Plan Sheet / Specification Reference= Item No. 134 Sound Wall (Masonry Block)

Question= Please clearly state if the CMU walls for the aesthetic pattern have split-face on one-side (freeway side)or if the walls have split-face on both sides (freeway & residential).

  • The CMU wall pattern has a split-face surface on both sides of the wall.

    26 

   Q:10/14/08
   R:10/15/08

Plan Sheet / Specification Reference= PLAN SHEET...603 

Question= Reference is made to sheet RSP P18???? Where is it?

  • The most recent standard plans are available at:
          "http://www.dot.ca.gov/hq/esc/oe/project_plans/HTM/stdplns-met-new04.htm"

    27 

   Q:10/14/08
   R:10/14/08

Plan Sheet / Specification Reference= PLAN SHEET..."L" Example of one: sta 482+00 - 486+00 on 15L1

Question= There are alot of tapering PCC sections... when the taper is less than one lane...must it be tied? Do you want to have a 1.2 m wide section with isolation joint?

  • Please refer to standard plan P2.  Isolation joints are used for widening adjacent to existing skewed pavement.Tied joints are used for widening adjacent to non-skewed pavement.

    28 

   Q:10/14/08
   R:10/15/08

Plan Sheet / Specification Reference= Special Provision Section 8-2.02 CORROSION CONTROL FOR PORTLAND CEMENT CONCRETE

Question= 8-2.02 states that portland cement concrete at slag embankments is considered to be in a corrosive environment.  Please identify the structures that this section applies to.

  • Please refer to the materials information brochure for the corrosion analysis of the in place materials.  Section 8-2.02 applies if slag aggregate is used per section 8-1.04. 


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