BIDDER'S INQUIRIES & RESPONSES
DISTRICT 11 CONSTRUCTION


CONTRACT NO: 11-2M0804
ROUTE / KP 11-SD-8-R31.8/R39.7
LOCATION In San Diego County Near Alpine From Viejas Creek Bridge To Horsethief Creek Undercrossing
DESCRIPTION Replace Concrete Slabs, Grind Pavement, And Replace Shoulders.
CONTRACT TYPE A + B Bidding
ESTIMATE $4,580,000
WORKING DAYS

90

ADVERTISE DATE 03/29/2010
BID OPENING 05/13/2010
FINAL POSTING
05/10/2010 @ 11:45

Bid Summary

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 the day prior to the bid opening.


INFORMATION AVAILABLE



BID ITEMS
 SPECIALS
PLANS
 PLANHOLDERS




ORDERING PROJECT PLANS AND SPECIFICATIONS   

Cost per set: Bidders: $22, Non-bidders: $15. 4% UDBE Requirement.

ADDENDUM



 

BIDDER'S INQUIRY SUBMITTAL FORM


Inquiry No.
Inquiry

   1

  Q:04/01/10
R:04/23/10

Plan Sheet / Specification Reference= Item 15, HMAC, special provisions section 10-1.21


Question= Item 15, HMAC, special provisions section 10-1.21 states that the material will be governed by section 39 "Standard Process" that involves JMG, mix approval, and verification procedure.  The section also states that the "aggregate...must comply with the 3/8 inch grading".  It is common knowledge that there is no approved and verified mix design for 3/8 inch aggregate in the entire state of California.  It is known if it is physically possible to produce a 3/8 inch mix that will meet the quality requirements of section 39.  There are, however, approved mix designs with 1/2 inch aggregate.
Why don't you specify a product that can be manufactured and design the project to perform with that product?

  • Please see Addendum 1

 

  2
  Q:04/09/10
R:04/23/10

Plan Sheet / Specification Reference.= Calculation for Cost per day for A+B bidding, page 5 Volume 2.

Question= What is, or how do you calculate, the dollar amount used to multiply the working days bid to determine the B - Time portion of bid?

  • Please see Addendum 1

 

 3
  Q:04/09/10
R:04/13/10
R:04/14/10

Plan Sheet / Specification Reference.= Bid Item 20 - Replace Concrete Pavement, Spec Section 10-1.24, page 71, Base Replacement Layer, & plan sheet X-1

Question= Plan sheet X-1 Detail A, indicates remove existing 0.67' PCC& 0.35' CTB and install 1.02' RSC. Spec page 71, section Base Replacement Layer, first sentence reads "Replace removed base materials with RSC in a separate & distinct operation from replacing concrete pavement". Will the 1.02' RSC Concrete replacement slab require two operations, one to replace the 0.35' of CTB removed & a second to replace the 0.67' slab, OR can the new RSC be installed in one operation 1.02' thick?

  • Per the special provisions, Section 10-1.24, "REPLACE CONCRETE PAVEMENT (RAPID STRENGTH CONCRETE)": The replace concrete pavement slab requires two operations. Replace removed base materials with RSC in a separate and distinct operation from replacing concrete pavement.available for inspection.

 

 4
  Q:04/16/10
R:04/19/10

Plan Sheet / Specification Reference= Item 8 TEMP SHUTTLE VAN SERVICE. This seems to be intended to shuttle bicycle riders past a potentially temporarily closed shoulder for a distance of approximatley 4 miles with no distinction drawn between a daytime closure and a nighttime closure.

 

Question= If we acknowledge that virtually all bicyle riders would be travelling this route during daylight hours, we must consider the following: It is true that the shoulder is permitted to be closed during the day time. However, no freeway lanes may be closed during the day time and virtually nothing can be accomplished contributing to the completion of the construction work with only a shoulder closure.

Therefore is it extremely unlikely that this shoulder would ever be closed during the day time and equally unlikely that a bicycle rider would need to make use of a shuttle van during a night time closure. However, we can dispense with this discussion if we can acknowledge that the entire purpose of bicycle riding on a route anything like this one is to get some healthful exercise and enjoy the rustic scenery by developing a temporary, well-signed detour on non-freeway roads that would carry the riders past this reach of freeway in safety and comfort with the addition of a paltry 5.7 miles to what must surely be a planned ride involving many multiples of that distance. This eastbound detour would start at at the town of Alpine by taking the Tavern Road off ramp, travelling south to Japatul Road, thence southeasterly to Japatul Valley Road, thence northeasterly to rejoin interstate 8.

This detour would cost the taxpayers absolutely ZERO!

  • Please bid per current contract documents.
 5
  Q:04/20/10
R:XX/XX/XX

Plan Sheet / Specification Reference= Item 8, TEMPORARY SHUTTLE VAN SERVICE

Question= Is the TEMPORARY SHUTTLE VAN SERVICE required to be available during nighttime shoulder closures?

  • Per the special provisions Section 10-1.14, "Temporary Shuttle Van Service,"  the Contractor shall provide service whenever shoulders on Interstate 8 are closed under Section 10-1.09, "Maintaining Traffic."
6
  Q:04/20/10
R:04/21/10

Plan Sheet / Specification Reference= Item 8, TEMPORARY SHUTTLE VAN SERVICE

Question= If the purpose of this van is to shuttle touring bicycle riders, why is required to be ADA compliant/lift-equipped?


  • Please bid per current contract documents.
7
  Q:04/20/10
R:04/21/10

Plan Sheet / Specification Reference= Item 8, TEMPORARY SHUTTLE VAN SERVICE, Special Provisions section 10-1.14, sub paragraph 8.

Question= What permits and licenses does the State of California require a company to hold in order to operate the servie defined in the referenced section?

  • Attention is directed to the Standard Specifications, Section 7, "Legal Relations and Responsibility."
8
  Q:05/03/10
R:05/05/10

Plan Sheet / Specification Reference= Item 32, PAVEMENT MARKER (RETROREFLECTIVE-RECESSED), Special Provisons Section 10-1.35 (Page 81)

Question= Our assumption is that the existing recesses are to be reused, but some new recesses will have to be cut. Does Caltrans have a quantity for this? And after grinding will the existing recesses have sufficient depth for placement of new markers?

 

  • Per Section 85-1.07 of the Standard Specifications the Contractor is responsible for constructing pavement recess in existing or new pavement to the depth shown on the Standard Plans recess detail. The Post Mile limits of the recessed markers are from R34.17 to R39.7.


9
  Q:05/04/10
R:05/05/10

Plan Sheet / Specification Reference=THE link to the federal prevailing wages seems to be broken

Question= fix it? 

  • The link works but you have to navigate to the ad2 subdirectory 11-2M0804fw.pdf. Here is a direct link 11-2M0804fw
10
  Q:05/04/10
R:05/05/10

Plan Sheet / Specification Reference= ITEMS 12 & 15, COLD PLANE AC PAVE, FURN & PLACE HMA.The typical sections, and the Q sheets, depict consistent widths of shoulders: 8' inside, 10' outside. From a site visit, it is apparent that there are substantial portions of the project where the existing shoulders are not as shown. Some of the inside shoulder is only about 5' wide, and portions of the outside shoulder is greater than 10' wide.

Question= What work will be done at locations where the shoulders vary from the widths shown on the typical sections? If the plan is to only perform the milling and paving on the 10' of shoulder, the operation is quite different than it would be if the entire width of shoulder is to be treated. Cold planing and paving beyond the 10' width shown on the outside shoulder would involve a separate operation to cold plane and reconstruct the variable cross fall for the high side of super ditches and the variable widths that exist in the field.

  • It is the intent of the contract to coldplane and pave the entire shoulder width on both the inside and outside shoulders. This would include high-side-of-super ditches. The contractor will get paid for the number of square yards coldplaned and number of tons of HMA placed per the contract items.


11
  Q:05/06/10
R:05/10/10

Plan Sheet / Specification Reference= Item # 15 Hot Mix Asphalt

Question=Item # 15 addendum #1 changes the HMA from 3/8" to 1/2" but
does not change the grade of binder. Is the binder going to remain PG
64-16 or will it change to PG 64-10?

  • The PG grade should stay at 64-16.




 


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