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Viewing inquiries for 04-0Y2004

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Inquiry #1: Bid Schedule shows Bid Item #21 as 620 tons of HMA-OGFC; however, the plan Typical Cross-Sections (plan page 2-3) and Summary of Quantities sheet (plan page 41) show 620 tons of RHMA-O. Please clarify which mix is correct.
Inquiry submitted 05/15/2023

Response #1:The inquiry has been received and submitted for consideration.
Response posted 05/16/2023


Response #2:See Addendum 1 issued on May 24, 2023.
Response posted 05/24/2023



Inquiry #2: According to the Typical Cross-Sections (plan pages 2-3) we are to Cold Plane .50' and pave back .50' HMA-A, and then Cold Plane another .10' and pave back with .10' RHMA-O. Is it Caltrans intent to pay for Cold Plane in the same areas twice as reflected in the Summary of quantities (plan page 41)? Or can Contractors Cold Plane .60’ in one operation and then pave with .10’RHMA-O/.50’HMA-A?
Inquiry submitted 05/15/2023

Response #1:The inquiry has been received and submitted for consideration.
Response posted 05/16/2023


Response #2:Cold Plane in the same areas twice. Since the existing surface is RHMA-O, we are putting RHMA-O at surface. Therefore, we recommend additional 0.10' cold plane and 0.10' RHMA-O after the whole lane dig out repairs. Therefore Cold Plane in the same areas twice.

"0.50' COLD PLANE AC PAVEMENT
0.50' HMA (TYPE A)"
with
"0.10' COLD PLANE AC PAVEMENT
0.10' RHMA-O"

Response posted 05/16/2023



Inquiry #3: 1)Sheet C-1 - Please correct Legend to Read 0.50' CP AC / 0.50' HMA / 0.10' CP AC / 0.10' RHMA-O
2)Sheet Q-1 - EB - R8.32 to R8.56, Depth for 15,720 sf show 0.10' on Q1 but C-4 show 0.50',0.10'. What is the correct paving section for this area?
3)Sheet Q-1 - EB - R8.32 to R8.56, Depth for 19,450 sf show 0.50', 0.10' on Q1 but C-4 show 0.10'.What is the correct paving section for this area?
4)Sheet Q-1 - EB 20.3, Depth for 4,301 sf shows 0.15 on Q1 but C-14 shows0.50',0.10'.What is the correct paving section for this area?
5)Sheet Q-1 - EB Route 580 off-ramp to nb route 680 - PM 20.76, Area for 3,900 sf, Q-1 shows 0.15' but C-16 show 0.50' & 0.10'.What is the correct paving section for this area?
6)Sheet Q-1 - EB Route 580 off-ramp to nb route 680 - PM 20.87, Depth for 840 sf shows 0.15' on Q-1, but C-16 Shows 0.50',0.10'. What is the correct paving section for this area?
7)Sheet Q-1 - WB R8.4, Depth for 3,600 sf show a depth of 0.50',0.10' on Q-1, but C-4 Shows 0.10'. What is the correct paving section for this area?
8)Sheet Q-1 - WB R8.4, Depth for 1,200 sf show a depth of 0.10' on Q-1, but C-4 Shows 0.50', 0.10'. What is the correct paving section for this area?

Inquiry submitted 05/23/2023

Response #1:The inquiry has been received and submitted for consideration.
Response posted 05/23/2023


Response #2:Please bid per the quantities in sheet Q-1, and the bid item quantities.
Response posted 05/30/2023



Inquiry #4: In clarification of Inquiry #2 Response:

It is the State's intent to cold plane 0.50', of the existing roadway, and install 0.50' HMA (Type A).

Then cold plane 0.10', of the newly installed HMA (Type A), and install 0.10' of RHMA-O.

Please confirm.
Inquiry submitted 05/23/2023

Response #1:The inquiry has been received and submitted for consideration.
Response posted 05/23/2023


Response #2:
Response posted 05/23/2023


Response #3:Yes, that is the intention.
Response posted 05/30/2023



Inquiry #5: How is the contractor getting paid for the removal of 1,270 CY of existing material where the RAPID STRENGTH CONCRETE BASE is to be installed?

Please note that INDIVIDUAL SLAB REPLACEMENT (RSC) will only pay for the removals in top 0.75' not the 0.35'-0.50' of RAPID STRENGTH CONCRETE BASE.

Please advise.
Inquiry submitted 05/23/2023

Response #1:The inquiry has been received and submitted for consideration.
Response posted 05/23/2023


Response #2:There is no bid item for this work.
Response posted 05/30/2023



Inquiry #6: Please clarify what type of work is taking place in Sheet C-6. The limits and the notes are vague.
Inquiry submitted 05/24/2023

Response #1:The inquiry has been received and submitted for consideration.
Response posted 05/24/2023


Response #2:There is no work on C-6. It provides notice of the existing Weigh-In-Motion system.
Response posted 05/30/2023



Inquiry #7: Please clarify what type of work is taking place in Sheet C-8. The limits and the notes are vague.
Inquiry submitted 05/24/2023

Response #1:The inquiry has been received and submitted for consideration.
Response posted 05/24/2023


Response #2:There is no work on C-8. It provides notice of the existing Weigh-In-Motion system.
Response posted 05/30/2023



Inquiry #8: On sheets C7 & C9 the drawings show overcrossings and the improvement areas below are not captured in the plan view.

Do the areas under the overcrossings get improved? Please revise the quantities if the areas are not currently captured.


Inquiry submitted 05/24/2023

Response #1:The inquiry has been received and submitted for consideration.
Response posted 05/24/2023


Response #2:Work shown on both sides of the overcrossings are to be continuous and are already included in the quantities.
Response posted 05/30/2023



Inquiry #9: We are in receipt of Addendum No. 1 that was issued today on 5/24/23. The addendum did not have new drawings. Will Caltrans be releasing an additional Addendum with revised drawings to resolve many of the critical issues in the bidder inquiries?
Inquiry submitted 05/24/2023

Response #1:The inquiry has been received and submitted for consideration.
Response posted 05/24/2023


Response #2:No further addendum will be issued.
Response posted 05/30/2023



Inquiry #10: “ARB production consists of proportioning:
The preblended liquids. Combine with the proportioned scrap tire rubber and high natural rubber simultaneously and mix for the specified time at specified temperatures.
The method and equipment for combining liquid and dry ingredients must enable the resident engineer to readily determine compliance with proportioning requirements for each material and the completed ARB. The district weights and measures coordinator (WMC) must approve all required equipment before use.”

In order to meet the OCT 2022 MPQP Manual Update publication, simultaneously mixing both rubber types require the rubber blending plant to have (2) rubber hoppers. One hopper would proportion the scrap tire rubber and the second hopper would proportion the High Natural Rubber. Without the presence of a second hopper, the data collection component of the required MPQP reporting does not align with the latest MPQP update.

On 4/3/2023 and 4/7/2023, District 4 WM’s approved a single hopper Asphalt Rubber Blending Plant setup at (2) separate locations within D4. This can be confirmed via the Weights and Measures Certified Material Plant List available on CDOT’s website. CDOT has responded in previous D4 pre-bid bidder inquiries that they would be enforcing the approved Oct 2022 MPQP Manual Update. The approval of the single hopper plant on 4/3 and 4/7 directly contradicts previous pre-bid responses and the OCT 2022 MPQP Manual update language. The guidance previously provided is causing confusion amongst AR Binder Suppliers and Hot Mix Facilities. This is potentially allowing an unfair bidding environment to exist and thrive as Dual Hopper Plants have twice the maintenance/calibration costs. Will D4 Weights and Measures continue to allow Single Hopper Asphalt Rubber Plants to operate within District limits? Please advise.

Inquiry submitted 05/30/2023

Response #1:The inquiry has been received and submitted for consideration.
Response posted 05/30/2023


Response #2:This issue is under review by HQ Construction at this time. Until a decision is made, the district is to approve both single and dual hopper plant setups.
Response posted 05/31/2023

The information provided in the responses to bidder inquiries is not a waiver of Section 2-1.07, "JOB SITE AND DOCUMENT EXAMINATION" 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.