BIDDER'S INQUIRIES & RESPONSES
DISTRICT 11 CONSTRUCTION
CONTRACT NO:  11-080934
ROUTE / KP 11-SD-15,56-M30.4/M31.4,14.3/15.3 
LOCATION In San Diego County In San Diego On Route 15 From 0.9 Km South To 0.1 Km North Of Route 56/15 Separation And On Route 56 From 0.5 Km West To 0.5 Km East Of Route 56/15 Separation.
DESCRIPTION Construct Additional Lanes, Movable Barriers, And Replace Bridges.
ESTIMATE $ 37,000,000.00
DESIGN SEQUENCING PROJECT
ADVERTISE DATE 01/10/05
BID OPENING 03/03/05
FINAL POSTING 03/02/05    @   18:55

BID RESULTS
1
F C I CONSTRUCTOR, INC. $32,228,497.00 
2
COFFMAN SPECIALTIES, INC. $32,685,000.00 
3
MCM CONSTRUCTION, INC. $32,937,879.00 
4
HERZOG CONTRACTING CORP. $36,510,497.00 

The Caltrans District 11 Office is located at 2829 Juan Street, San Diego, CA 92110. The mailing address is P.O. Box 85406, San Diego, CA 92186-5406. 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
 CROSS SECTIONS
 BID ITEMS
 SPECIALS
 PLANS
 PLANHOLDERS
 MIBs
 SANDAG ENVIRONMENTAL DOCUMENT
 STIPULATED INTERLOCUTORY  JUDGEMENT
   
 
 
ADDENDUM

 ADDENDUM NO.1 02/17/05
 
 
 

BIDDER'S INQUIRY SUBMITTAL FORM
 

1
  Q:01/18/05
  R:01/27/05
Plan Sheet / Specification Reference=project Cross sections 

We would like a electronic copy of the project cross sections. 

  • Cross sections are available as of 01/27/05 and can be downloaded for printing from the link above at any local printing firm or on your own printing equipment: 
     MESA BLUEPRINT 
     5560 Ruffin Road Suite 5 
     San Diego, CA 92123 
     (858) 541-1500    FAX (858) 278-0558 
     e-mail to  plot@mesablueprint.com San Diego, CA 92123
2
 Q:01/19/05
  R:01/27/05
Plan Sheet / Specification Reference=Project Plans - Retaining Walls -
Miscellaneous Details No. 5 Plan sheet no. 558 of 579.

Question=What are the limits of excavation below the footing and leveling
pad between the following stations:
315+23 to 315+38
315+38 to 318+45

  • For the excavation limits, please refer to the detail titled "Limits of Excavation and Backfill Profile Diagram for RW No. 8 (Br. No. 57-1170M)" on Plan Sheet No. 558. The limits of excavation below the bottom of footing or leveling pad are:
          Station   Limits of Excavation
          315+23 to 315+38  Varies (@ 1:10 slope) from 0 m to 1.5 m 
          315+38 to 318+30  1.5 m 
          318+30 to 318+45  Varies (@ 1:10 slope) from 1.5 m to 0 m
3
Q:02/10/05
  R02/16/05
  R03/02/05
Plan Sheet / Specification Reference= Contract Plan Sheet #s 415,441,468 and 493 of 579

Question = What are the specified strengths for the CIDH piles for the NB/SB ON/OFF ramps.

    All CIDH piles would need to have a 28MPa specified strength for each bridge.
    For NB/SB ON/OFF ramps see Section 49-4.01, "Description," of the Standard Specifications which states:  "Concrete filling for cast-in-place concrete piles is designated by compressive strength and shall have a minimum 28-day compressive strength of 25MPa.
    For the Main Access ramp see Plan Sheet 337 with CIDH (28 MPa at 28 days). 
4
Q:02/10/05
 R:02/18/05
Plan Sheet / Specification Reference=Section 2 Proposal Requirements and Conditions Subsectuion 2-1.01 General

Question=Is there an addenda pending for this project and will it change/delay the bid date?

  •  Please refer to Addendum No. 1.
5
Q:02/22/05
 R:03/02/05
Plan Sheet / Specification Reference= Rebar cage designs for Column and CIDH piles.  Sheets 382,365,447 & 448

Question=Upon the review of the rebar cages for the CIDH piles and Column Cages (which embed approx. 12' to 17' feet down in the piles) we have noted some potential problems related to the clear rebar spacing windows.

Can and will the Column rebar cage "window" spacing be modified to meet Caltrans required design standard of 5"x5" minimum?  The column cage at Bent 1 & Bents 5 thru 7 only have 4 1/4" clearance between the vertical bars.  Since this cage is embeded down in the CIDH pile and will have to be poured with the pile, it may effect the concrete flowability through this cage before it even reaches the outter CIDH cage. 
 

  • Column cage spacing at Bent 1 & Bents 5 thru 7  meet minimum clearance and spacing. See Section 49-4.01, "Description," of the Standard Specifications. 
At the NB On ramp, the CIDH pile cage at Bent 1 does not meet the 5"x5" window design.  Will this be changed?  Also, on this same structure, Bents 2 & 3 column cages do not have the proper 5"x5" rebar windows on the vertical bars.  WE this be changes?
 
  •  The CIDH pile cage at Bent 1 meet minimum bar spacing. 

  • Bents 2 & 3 column cages meet minimum clearance and spacing.
Historically, this out of standard specification situation has led to unnecessary anomaly risks or false readings, which may delay pile installation production.

 

6
Q:02/22/05
 R:03/02/05
Plan Sheet / Specification Reference=CIDH pile and Column connection...Sheets 362,363,364,365,366, 447, 448 &450

Question=The current contract plan design of the connection of the column rebar cages to the CIDH piles is cumbersome, difficult, and unsafe to the traveling public.

With no splices allowed in the column cages, the cages will all have to be set full height, after the CIDH pile cage is first set and supported at grade.  This task will be difficult, if not impossible to complete and pour, all in 1-day, especially if these shafts are constructed utilizing slurry. 
 

  •  No allowable construction joints are shown on the plans for the CIDH concrete piling.  Bid opening is March 3, 2005.  Please bid in conformance with current bid documents.

  •  
We ask that the Designer review the possibilty of allowing an optional Construction Joint (C.J.) at the bottom of the column cage.  This would allow the CIDH pile to be placed and poured first and separately from the column cage.

Also, we request the possibility (in conjuction with the above alternate C.J.) of allowing the isolation casing being extended to a depth of 3'-0" (min.) past the tip elevation of the column cage to allow the proposed alternate C.J. as well as a clean C.J. to produce a quality shaft. 
 

  • Isolation casing extensions are not shown on the plans.   Please bid in conformance with current bid documents. 
7
Q:02/22/05
 R:03/02/05
Plan Sheet / Specification Reference=

Section 10-1.45 “Piling,” of the Special Provisions indicates that “Acceptance tests of the concrete will be made by the Engineer…” and “Tests will included gamma-gamma logging.”  Pursuant to section 6-3.01 of the Standard Specifications, “…all tests shall be performed in accordance with the methods used by the Department of Transportation…”, however we are unable to locate Caltrans’ defined test method for gamma-gamma logging.  Accordingly, please provide the following information:

· Defined procedures for gamma-gamma logging (Cal Test number);
· Defined procedures for interpretation of gamma-gamma logging results;
· Defined procedures for re-test and interpretation of gamma-gamma logging.
 

  • Information regarding gamma-gamma logging procedures can be obtained at the following website: http://www.dot.ca.gov/hq/esc/geotech/gammaprocedure.pdf

  •  

     
     
     

    Additional information regarding gamma-gamma logging is available at the following websites: 
    http://www.dot.ca.gov/hq/esc/geotech/ft/gamma.htm
    http://www.dot.ca.gov/hq/esc/geotech/gg/geophysics2002/ggl_geophysics.pdf

 
8
Q:02/23/05
 R:02/24/05
Plan Sheet / Specification Reference=ITEM #151 REMOVABLE BOLLARD.
SHEET # 47. SPECIAL PROVISION SECTI0N 10-1.76

Question=SHOULD THE REMOVABLE BOLLARDS BE FABRICATED (GALVANIZED STEEL)PER THE DETAILS SHOWN ON THE PLANS.OR ARE THE TO BE CAST IRON AND POWDER COATED PER THE SPECIAL PROVISIONS.

  • Please bid per the contract documents.
9
Q:02/24/05
 R:03/02/05
Plan Sheet / Specification Reference=The Special Provisions...Sheet 223

Question=Under CIDH piles...aprroixmately paragraph 7 states; "If the drilling for any cast-in-drilled-concrete pile cannot be completed in the same shift, the Contractor will be required to keep the drilled hole 'dry' by pumping methods until drilling starts again on next shift"

Please clarify...does this apply to the shaft only when it is completely drilled to specified tip elevation or during the intial start (at grade) throughout the entire drilling and until poured?
Contractor Interpretation=We assume this does not apply for shafts constructed utilizing synthetic polymer!
 

  • Please see Sections 49-4.01 "Description," and  Section 49-4.03, "Drilled Holes," of the Standard Specifications.
10
Q:02/25/05
 R:02/28/05
Plan Sheet / Specification Reference=bid#171 tru. 177  all electrical
work to be done. ,E-1truE-6, 10-3-signals,lighting and electrical systems. 

Question=Q: What size are the sizes of the luminair arms.

  • As stated per STD plans ES-6A and ES-6H.
Q: Wher are the locations of the #5t and #6t pullboxes.
  • Locations will be given when final plans are delivered for Phase III and IV submittals.
Q: What is the method of installation for conduit.
  • Conduit cost per meter. All types of methods are included per SSP and Standard Specifications. Exact location and method will be shown on final plans.
Q: How much conduit is going to empty.
  • Final plans will show exact contents in conduit.
Q: How much conduit is going to be installed by "trenching in pavement
method".
  • Same answer see above.
Q: For fiber opitics how many splices are going to be installed.
  • Stated in SSP under Section 10-3, Signal,Lighting and Electrical Systems, Cost      Break_Down, 3. Fiber Optic Communication System (see table).
11
Q:02/28/05
 R:02/02/05
Plan Sheet / Specification Reference=Sheet 366 & 450 Isolation Casings

Question=Can the Cut-off elev. be lowered to match the bottom of the Isolation casing?
This would allow the CIDH pile to be poured first and the Isolation casing set after by the GC.
 

  • Bid opening is  March 3, 2005.  Please bid in conformance with current bid documents.
 
12
Q:02/28/05
 R:02/02/05
Plan Sheet / Specification Reference=Bid Item 59, Check Valve in a quantity of 40 Ea., Irrigation quantities plan sheets 105 through 116, Special Provisions pages 138 through 148, Standard Specifcations July 1999, Section 20, pages 174 through 180.

Question=This item does not seem to have a description of materials, of usage, or size related to it in the various referenced construction documents.
 

  • In the 1999 Standard Specifications, Section 20-5.03F, "Valves and Valve Boxes", (page 204) states that when check valves aren't shown on the plans and there is a contract item for them in the, their location shall be directed by the Engineer. 

  •  

     
     
     
     
     
     
     
     
     

    When the special provisions do not contain any additional information regarding the check valves to be used, the section of the Standard Specifications cited above provides only  the  materials requirement for the check valves. 
    The sizes vary between 3/4" and 1 1/2" in  (20mm and 40mm).
     

 
13
Q:03/01/05
 R:03/02/05
Plan Sheet / Specification Reference=Item 159 (F) CONCRETE BARRIER TYPE 732 (MOD) EE 2513 METERS On Bridges and Barrier Slab 
Item 182 (F) CONCRETE BARRIER TYPE 182 (MOD) EE 1063 METERS 
On Retaining Walls 

Question=Item 159 Final Pay Quantity is 2513 Meters. This is over what is shown on the contract drawings. 

Is the 575 meters of Type 732 Mod rail shown on sheet 228 actually supposed to be Type 732A as first shown on sheet 231?
 

  • Concrete Barrier (Type 732 Modified) is used on the bridge decks, approach slabs, or mechanically stabilized embankment barrier slabs, with traffic adjacent. Concrete Barrier (Type 732 A Modified) is used on top of retaining walls with traffic adjacent. Refer to the barrier details in the Contract Plans. 
14
Q:03/01/05
 R:03/02/05
Plan Sheet / Specification Reference=CIDH Piling

Question=Will Foundation Recommendations be made available for the Bridges
with CIDH Piling?
 

  • Foundation Recommendations and Foundation Reviews are available within the two Information Handout packages for bidders and non-bidders.

  • See Section 5-1.17, "Project Information," (page 104) of the Special Provisions and Addendum No. 1 dated February 18, 2005 for information included in the Information Handout.
 
15
Q:03/01/05
 R:03/02/05
Plan Sheet / Specification Reference=Items 161 and 181, and Item 182. Sheet 228, 229 and 245

1.  The summary of Quantity Sheets on pages 228 and 229 show 189m of Type KA26A rail with tubularhandrail on wall No. 14L, but sheet 245 shows a type 732A modifiedrail on top of wall 14L. Plaese clarify.
 

  • Concrete Barrier (Type KA26A) is used on top of retaining walls with bicycle and/or pedestrian traffic adjacent.  Refer to the barrier details in the Contract Plans.
2.  Item 182 "Concrete Barrier Type 732A modified" and Item 159 "Type 732 modified" quantities both apear to account for the 575m of Type 732 modified rail shown for the district retaining walls(Sheet 228). As these items are both final pay, is it necessary that these quantities be resolved?
 
  • Please refer to the response to Bidder's Inquiry #13. 

  •  
 
16
Q:03/02/05
 R:03/02/05
Plan Sheet / Specification Reference=Concrete barrier at Retaining Walls

Question=1- Plan sheets 249 through 251 appear to have concrete barrier details similar to the "Structural" final design plans , sheets 518 through 561. The barrier shown on structural plans appear to agree with "Final Pay" quantities of Items 155 and 156. Request confirmation that "Final Pay" Items will be adjusted if and when the other Retaining wall designs are finalized and the required barrier types are identified.
2- Layout plan sheets 19 through 21 have many refrences to Retaining walls, e.g. " End RW 5 and 6". The structural, detail plans are numbered diffrently. Provide consistent identification to permit accurate assesment of the details required. 

  • Please refer to the response to Bidder's Inquiry #13 and bid in conformance with current bid documents.
 
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