Caltrans Office Engineer

Viewing inquiries for 08-0Q1104

Submit new inquiry for this project


Inquiry #1: What is the spacing of the #4 stirrups shown on Section C-C on sheet C-1 (13 of 23)?
Inquiry submitted 02/25/2013

Response #1:Submitted for consideration
Response posted 02/26/2013


Response #2:The spacing of the #4 stirrups is 6" c/c. Please note that it is shown on Standard Plan A76E.
Response posted 03/01/2013




Inquiry #2: i am looking at the hydroseed specs and have a question . it call for 30 LB of BFM along with the seed and fiber . Bonded Fiber Matrix comes pre packaged in the fiber , not as a tackifier that you add as a glue . wouldnt i use a binder instead ? and at what rate . thank you
Inquiry submitted 02/28/2013

Response #1:Submitted for consideration
Response posted 03/01/2013


Response #2:Most Contractors now use Fiber and Tackifier that is combined and it is called Bonded Fiber Matrix (BFM). Recently we have changed our way of thinking to keep up with this change in the industry. On this project we will use the combined BFM rate and it will be 2500 lbs per acre. This will include Fiber (Type-Wood) and BFM Tackifier (Type-Plant Based). Use the seed as shown in the plans.
Response posted 03/05/2013




Inquiry #3: Reference sheet L-9 Construction Note "Begin Concrete Barrier (Type 60GC)Sta 2645+50.00 80.08 LT" and "End Concrete Barrier (Type 60GC) Sta 2651+70.52 97.99 LT". Can you provide Upper Roadbed elevations and Lower Roadbed Elevations so the contractor can determine the CY of Concrete required in that section?
Inquiry submitted 03/04/2013

Response #1:Submitted for consideration
Response posted 03/05/2013


Response #2:Cross Sections are avaialble for pick up. Interested Potential Bidders should call (909) 829-3331 to arrange for getting a copy.
Response posted 03/08/2013




Inquiry #4: Does Caltrans have any cross sections or other information to enable the contractor to determine the total height of the type 60GC concrete barrier from sta 2645+50 to 2651+71 so that concrete and rebar quantities can be calculated?
Inquiry submitted 03/05/2013

Response #1:Submitted for consideration
Response posted 03/05/2013


Response #2:Concrete Barrier Type 60GC is shown on May 2006 Standard Plan A76D (page no. 32)
Response posted 03/08/2013




Inquiry #5: The current bid schedule does not account for any type of K-rail protection of excavations within 15' of the taveled way. After, Cold Planing, Roadway Excavation and Deepened Footing Excavation for the Barrier Rail, there will be a droppoff in excess of 0.15' within 15 feet of the traveled wayor the entire length of the project. Will Caltrans allow this situation without K-Rail protection? If not, please issue an addendum to either add K-Rail protection or direct the contractor to remove and replace the roadway excavation and paving in the same working window and to protect the footing excavations every 250 feet with steel plates.
Inquiry submitted 03/08/2013

Response #1:Submitted for consideration.
Response posted 03/08/2013


Response #2:As per Standard Specifications, NO excavations of height differential greater than 0.15 feet within 15 feet of the edge of a traffic lane are allowed. Therefore, no direction is required. Furthermore; since it was an inquiry, and to make it more comprehensive and consistent for all bidders, we will issue and Addendum to add termporary railing (TYPE K).
Response posted 03/13/2013


Response #3:Please refer to Addendum # 2 issued on March 14, 2013.
Response posted 03/18/2013




Inquiry #6: Ref Plan Sheet 13 (C-1) Note # 5. Clarify exactly where the scuppers are discontinued.
Inquiry submitted 03/08/2013

Response #1:Submitted for consideration.
Response posted 03/08/2013


Response #2:Scuppers are discontinued only at barrier footing which needs to be constructed at 250' intervals.
Response posted 03/11/2013




Inquiry #7: Will the California Paving Asphalt Price Index fall into play on bid item #23 "Hot Mix Asphalt(Type A)"?
Inquiry submitted 03/08/2013

Response #1:Submitted for consideration.
Response posted 03/08/2013


Response #2:The payment adjustment for price index fluctuations is applicable to asphalt contained in all materials for pavement structure and pavement surface treatment (Standard Specification 9-1.07). The California Paving Asphalt Price Index is used to calculate the payment adjustment for price index fluctuations, and it is not used to determine the bid price for item 23 "Hot Mix Asphalt (Type A)".
Response posted 03/13/2013




Inquiry #8: Ref Item 13 and plan sheetsL-1,L-3 and L-6- You currently have not provided for Temporary K Rail to allow removal of existing MBGR, and time for constructing new paving and installing new concrete barrier. Please provide a contract items for this temporary potective system.
Inquiry submitted 03/11/2013

Response #1:Submitted for consideration.
Response posted 03/13/2013


Response #2:An addendum will be forthcoming to address this issue.
Response posted 03/13/2013


Response #3:Please refer to Addendum # 2 issued on March 14, 2013.
Response posted 03/18/2013




Inquiry #9: Question regarding details shown on Page C-1:

Is a construction joint allowed between the Type 60G Modified Barrier and the 10" x 24" x 10' footing or is this section to be poured monolithic with no construction joint allowed?

Inquiry submitted 03/11/2013

Response #1:Submitted for consideration.
Response posted 03/13/2013


Response #2:Refer to note No. 2 of Construction Detail Sheet C-1.
Response posted 03/15/2013




Inquiry #10: In inquiry #2-response#2. Calls for a BFM tackifier(plant based). Can you be more specific on the type of tackifier. The BFM tackifier has always been guar with a crosslinker @ 10%. The plantago and starch based are not considered BFM tackifiers but are you accepting those also?
Inquiry submitted 03/12/2013

Response #1:Submitted for consideration.
Response posted 03/13/2013


Response #2:The material 'Guar' is derived from the ground endosperm of the Guar plant.
It is like sap from a tree and a natural substance (organic & plant based).
This is the material we want on this project.
Response posted 03/15/2013




Inquiry #11: For relocated signs, will they be relocated outside the new paving area?
Inquiry submitted 03/12/2013

Response #1:Submitted for consideration
Response posted 03/13/2013


Response #2:Yes, all signs will be relocated outside of the newly paved area
Please see attached notes which are part of sheet SQ1

"1)RELOCATION AND RESET LOCATION OF THE SIGNS WILL BE DETERMINED BY THE ENGINEER.
2)PRIMARY SIGNS LIKE COOK ST 1 MILE AND COOK ST NEXT EXIT MAY BE RELOCATED ON THE MEDIAN IF SPACE ON THE OUTSIDE SHOULDER IS LIMITED"
Response posted 03/15/2013




Inquiry #12: What is the thickness of the existing HMA at the shoulder?
Inquiry submitted 03/12/2013

Response #1:Submitted for consideration.
Response posted 03/13/2013


Response #2:The HMA thickness varies from 0.35' @ ETW to 0.25' @ ES.
Response posted 03/15/2013




Inquiry #13: Are we to do anything with the existing cracked shoulder HMA south of the cold plane line?
Inquiry submitted 03/12/2013

Response #1:Submitted for consideration.
Response posted 03/13/2013


Response #2:No. Please follow the Typical Cross-Section on sheet X-1.
Response posted 03/15/2013




Inquiry #14: On the typical cross section, there is one dimension for paving to be 14’ north of ETW plus 3’ (17’ overall, then there is a dimension for paving to be 1’ north of the Barrier. Is it the intent to provide 17’ of paved shoulder or to pave 1’ outside the Barrier?
Inquiry submitted 03/12/2013

Response #1:Submitted for consideration
Response posted 03/13/2013


Response #2:The x-section shows the existing shoulder is 10-12 feet, part of the 14 feet from traveled way. Leave the existing shoulder as is, except cold plane 1 foot. Pave the 1 foot and the space between the shoulder and the barrier to be placed, (which varies between 2 to 4 feet,) plus the 2 feet under the barrier and 1 foot on the outside of the barrier. We should end up with 17' total AND 1' outside the barrier.
Response posted 03/15/2013




Inquiry #15: Does the 5% shoulder grade extend below the barrier or is the barrier on level paving?
Inquiry submitted 03/12/2013

Response #1:Submitted for consideration.
Response posted 03/13/2013


Response #2:The barrier will be in level paving.
Response posted 03/15/2013




Inquiry #16: From STA 2559+11.99 to 2559+89.35, the barrier goes around a light pole and communications box. Do we pave the area around the box and light pole or just pave to the cross section limit outside the barrier?
Inquiry submitted 03/12/2013

Response #1:Submitted for consideration.
Response posted 03/13/2013


Response #2:Pave to the cross section limit outside the barrier.
Response posted 03/15/2013




Inquiry #17: Around STA 2640+00, there is an existing street light which may be in the way of the barrier construction. How is the street light dealt with?
Inquiry submitted 03/12/2013

Response #1:Submitted for consideration.
Response posted 03/15/2013


Response #2:Submitted for consideration.
Response posted 03/15/2013


Response #3:The barrier will be placed in front of the light pole.
Response posted 03/18/2013




Inquiry #18: Because of the clearance and grade changes that happen just north of the Barrier type 60 GC section, the certain criteria shown on the typical cross section on sheet 2 (X-1) can’t be obtained. Can you provide a typical cross section for the Barrier Type GC?
Inquiry submitted 03/12/2013

Response #1:Submitted for consideration
Response posted 03/15/2013


Response #2:Cross-section for Concrete barrier type GC is shown on Standard Plan A76D (page 37) of 2010 Standard Plan.
Response posted 03/18/2013




Inquiry #19: Ref your response to Pre Bid Inquiry # 3 and # 4- You had some design data available, when you established a need for Type 60GC barrier. Please share this, by providing plan details to all plan holders via Addendum, so we know what you have in mind. At the least, why not post your apparent avaiable cross sections on line, in lieu of requiring us to make arrangements to "pick them up".
Inquiry submitted 03/14/2013

Response #1:Submitted for consideration
Response posted 03/15/2013


Response #2:District 08 is looking into the possiblility of having Cross-Sections being posted online. Until then, the Cross-Sections for this project will be abailable to all bidders via a CD in pdf format. To obtain a copy, please call 909-829-3331
Response posted 03/21/2013




Inquiry #20: On the provided cross sections for the Type 60GC, it appears that there will backfill and slope finish behind the retaining portion of the wall. What bid item should we include the cost of this backfill?
Inquiry submitted 03/15/2013

Response #1:submitted for consideration.
Response posted 03/15/2013


Response #2:In 2010 Standard specification section 83, it says "Excavation and Backfill must comply with section 19. On section 19-7.04, paragraph 1, it says "Local borrow is paid for as roadway excavation". So, it should be paid under roadway excavation
Response posted 03/18/2013




Inquiry #21: Addendum #2 has added substantial work to the contract scope. Will you be increasing the advertised " Engineer's Estimate" and Time of Completion accordingly?
Inquiry submitted 03/15/2013

Response #1:Submitted for consideration.
Response posted 03/18/2013


Response #2:The revised estimate of cost of the project is $3,360,000. The number of Working Days will remain unchanged (90 working days).
Response posted 03/20/2013




Inquiry #22: Was the Bid Opening Date for this project postponed?
Inquiry submitted 03/18/2013

Response #1:Yes. Addendum # 2 postponed the Bid Opening Date for this project.
Bids will be opened on Thursday, March 28, 2013, instead of the original date of Thursday, March 21, 2013.

Response posted 03/18/2013




Inquiry #23: This email is in response to your Response #2 that states

"Most Contractors now use Fiber and Tackifier that is combined and it is called Bonded Fiber Matrix (BFM). Recently we have changed our way of thinking to keep up with this change in the industry. On this project we will use the combined BFM rate and it will be 2500 lbs per acre. This will include Fiber (Type-Wood) and BFM Tackifier (Type-Plant Based). Use the seed as shown in the plans."

That is an incorrect statement. The new 2010 Caltrans Standard Specifications clearly states the requirements for a Bonded Fiber Matrix (BFM). BFMs are made with with other products other than a "Type-Plant Based" tackifier. There is a substancial performance difference and Caltrans erosion control testing as San Diego State. There is a substancial price difference as well.

The hydroseeding industry has not changed it understanding of what a BFM is. BFMs are pre-packaged products with a certain type of chemistry.

It seems as though some hydroseeding contractor has been providing Caltrans with incorrect information.

Please call Jack Broadbent and Greg Balzer to clarify.

Inquiry submitted 03/26/2013

Response #1:Submitted for consideration.
Response posted 03/27/2013




Inquiry #24: In Division V page 15 there is no mention of requiring CT 371 or of treating asphalt aggregates with an anti-strip additive, is this test and an additive required for this project?
Inquiry submitted 03/27/2013

Response #1:Submitted for consideration.
Response posted 03/27/2013


Response #2:No, this is not a test. Lime is not required at this location.
Response posted 03/27/2013






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.