Caltrans Office Engineer

Viewing inquiries for 11-264114

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Inquiry #1: can plantago binder be used with wood fiber mulch to make Bonded Fiber Matrix....and how much plantago tacifier do we use??
Inquiry submitted 04/08/2013

Response #1:Please refer to Standard Specification Section 21-1.02F(3) for the Bonded Fiber Matrix Tackifier and the Bonded Fiber Matrix Table on Plan Sheet WQ-1 for the application rate for fiber and tackifier (combined).
Response posted 04/08/2013




Inquiry #2: Referencing sheets D-1, D-2, and DD-3 due to the condition of the existing curb/gutter and sidewalk, it will not be possible to perform the work without causing extreme damage to the existing curb/gutter and sidewalk. Would the agency consider creating a Minor Concrete item for the replacement of the curb/gutter and sidewalk at these locations?
Inquiry submitted 04/18/2013

Response #1:Submitted for consideration.
Response posted 04/18/2013


Response #2:Please refer to addendum #1.
Response posted 05/15/2013




Inquiry #3: Is is possible to obtain a copy of the Existing Laurel Street Overcrossing as built plans?
Inquiry submitted 05/13/2013

Response #1:Yes. Please refer to Section 2-1.06B "Supplemental Project Information" (pg 17)of the Standard Specifications.
Response posted 05/13/2013




Inquiry #4: 1. Should all work conform to the “Secretary of the Interior’s Standards for Rehabilitation” published in the most current edition of the United States National Park Service in “The Secretary of the Interior’s Standards for the Treatment of Historic Properties”?

2. Are the specialty historic subcontractors required to have at least ten (10) years experience on similar historic projects?

3. Will this project require a historic conservator?

4. Will the historic sub contractor(s) require certification or experience to install restoration products specified?

5. Will there be inspection on the historic restoration by the historic architect or a historic consultant?

6. Is this project under the governing jurisdiction of the State Historic Preservation Office?

7. Is the project under the local governing jurisdiction of the City of San Diego Preservation Office?

8. Is the project listed on the National Register of Historic Places?

9. The specifications state that the materials, methods and mock ups are to be approved by the engineer; do these also have to be approved by the historic consultant?

10. The Secretary of the Interior’s Standards for Rehabilitation warn against sandblasting. Currently all the spall repair is called out to be abrasive blasted to prepare for the repair work. As this could damage the adjacent surface, should the repair surface be prepared by grinders and chisels for the concrete and mechanical wire brushes for the rebar?

11. The bid documents are requesting pricing based on square foot cost. Please confirm that one square foot will be represented by 0”-12” x 0”-12’ per location.

12. There is a lump sum price requested for Pressure Rinse Concrete. Please confirm this is just to be performed once at the beginning of the project.

13. For Pressure Rinse Concrete: Are cleaning products to be used for this work? Is so what kind?

14. Is the Graffiti to be removed? Is so, is this required to be chemically removed so it doesn’t damage the historic concrete? Is so, where should pricing for this be included?

Inquiry submitted 05/15/2013

Response #1:Submitted for consideration.
Response posted 05/15/2013


Response #2:1. Should all work conform to the “Secretary of the Interior’s Standards for Rehabilitation” published in the most current edition of the United States National Park Service in “The Secretary of the Interior’s Standards for the Treatment of Historic Properties”?

Please bid per the current contract documents.

2. Are the specialty historic subcontractors required to have at least ten (10) years experience on similar historic projects?

No.

3. Will this project require a historic conservator?

No.

4. Will the historic sub contractor(s) require certification or experience to install restoration products specified?

No.

5. Will there be inspection on the historic restoration by the historic architect or a historic consultant?

Yes.

6. Is this project under the governing jurisdiction of the State Historic Preservation Office?

Yes.

7. Is the project under the local governing jurisdiction of the City of San Diego Preservation Office?

Yes.

8. Is the project listed on the National Register of Historic Places?

The Cabrillo Bridge is included within the National Historic Landmark boundary for the El Prado District of Balboa Park and part of the state designated Cabrillo Historic Parkway.

9. The specifications state that the materials, methods and mock ups are to be approved by the engineer; do these also have to be approved by the historic consultant?

The Engineer will be the final approval authority.

10. The Secretary of the Interior’s Standards for Rehabilitation warn against sandblasting. Currently all the spall repair is called out to be abrasive blasted to prepare for the repair work. As this could damage the adjacent surface, should the repair surface be prepared by grinders and chisels for the concrete and mechanical wire brushes for the rebar?

Please bid per the current contract documents.

11. The bid documents are requesting pricing based on square foot cost. Please confirm that one square foot will be represented by 0”-12” x 0”-12’ per location.

One square foot is 12" x 12".

12. There is a lump sum price requested for Pressure Rinse Concrete. Please confirm this is just to be performed once at the beginning of the project.

Please bid per the current contract documents. Refer to the added provisions to section 10-1.02 of the Revised Standard Specifications for Section 10-1 and 15-5.09 "Pressure Rinse Concrete" of the contract Special Provisions.

13. For Pressure Rinse Concrete: Are cleaning products to be used for this work? Is so what kind?

Please bid per the current contract documents. Refer to Section 15-5.09B "Materials" of the contract Special Provisions.

14. Is the Graffiti to be removed? Is so, is this required to be chemically removed so it doesn’t damage the historic concrete? Is so, where should pricing for this be included?

Graffiti removal is not part of this contract.

Response posted 05/21/2013




Inquiry #5: In reference to Inquiry #3 and obtaining Laurel St Overcrossing as-built plans. We have submitted a fax requesting the as-built plans to the number listed in the Standard Specifications on page 17 with no response. We have also left numerous phone messages to the phone number listed on page 17 with no response. Please provide a phone number and name we can contact in order to obtain a copy of the Laurel Street OC as-built plans.
Inquiry submitted 05/15/2013

Response #1:Submitted for consideration.
Response posted 05/15/2013


Response #2:Please refer to Inquiry #6.
Response posted 05/17/2013




Inquiry #6: Reference Inquiry #5 - We did receive a CD today from Sacramento with the Bridge As-Builts. Please disregard request for name and phone number.
Inquiry submitted 05/16/2013

Response #1:Disregarded.
Response posted 05/16/2013




Inquiry #7: Reference plan sheet 94 and plan sheet 106. Plan sheet 94 shows bridge removal (portion) for Access Openings. Plan sheet 106, section B-B shows rebar details for the reconstruction of the Access Openings. Please confirm whether the concrete for the reconstruction of the Access Openings is paid for under "Structural Concrete - Bridge". If not, please confirm where the concrete is to be paid.
Inquiry submitted 05/16/2013

Response #1:Submitted for consideration.
Response posted 05/17/2013


Response #2:Concrete for pier wall access opening reconstruction is paid as “STRUCTURAL CONCRETE, BRIDGE”.
Response posted 05/20/2013




Inquiry #8: Item 40- Reconstruct Steel Backed Timber Guardrail. Are all components of the guardrail to be reused? Typical Reconstruct Metal Beam Guardrail usually calls for new wood posts, blocks and hardware. Please clarify which components if any Caltrans wants replaced on this item. Thank you.
Inquiry submitted 05/20/2013

Response #1:Submitted for consideration.
Response posted 05/20/2013


Response #2:Please refer to Section 15-2.04A of the Standard Specifications.
Response posted 05/21/2013




Inquiry #9: Reference Bid Item #26 - Remove Formwork and Special Provisions Section 15-4.03 on page 51. How will SF quantities be established for the following removal items of work that are to be included in the Remove Formwork bid item: catwalk hangers, steel cables, drain pipe, electrical conduit and equipment.
Inquiry submitted 05/20/2013

Response #1:Submitted for consideration.
Response posted 05/21/2013


Response #2:Please refer to Section 15-4.03 “Remove Formwork" Form Work” of the current contract Special Provisions and “Estimate of Remove Formwork” Table shown on sheet 95 “Demolition Details No. 7” of the current contract plans.
Response posted 05/21/2013




Inquiry #10: Aggregate gradation for HMA Roadway and Bridge. Spec page 59, section 39-1.02E indicates HMA Type A 3/4". Section 39-1.13 specifies Type A, but no aggregate gradation. Standard specifications indicate 1/2" aggregate for bridge decks. Therefore it is our understanding that 3/4" aggregate is to be used for HMA Roadway, and 1/2" aggregate for HMA placed on the bridge, is this correct?
Inquiry submitted 05/22/2013

Response #1:Submitted for consideration.
Response posted 05/22/2013


Response #2:Yes, 1/2" aggregate is for HMA placed on the bridge and 3/4" aggregate is to be used for HMA Roadway. Please refer to Section 39-1.13 of the Standard Specifications for the bridge and Section 39-1.02E of the Special Provisions for the roadway.
Response posted 05/24/2013




Inquiry #11: Reference is made to Section 15-5.03, Repair Spalled Surface Area, of the 2010 Standard Specifications. In Sub-Section 15-5.03B, Materials, it states that Mortar must comply with Section 51-1.02C which states that bonding material must be magnesium phosphate concrete. Is this the material to be used for patching the exterior or will Section 51-1.02F, Mortar, be accepted as an alternative?
Inquiry submitted 05/22/2013

Response #1:Submitted for consideration.
Response posted 05/22/2013


Response #2:Please bid per current contract documents. No, Section 51-1.02F, Mortar, will not be applicable.
Response posted 05/24/2013




Inquiry #12: Would it be allowable to extend the distance from the footings to bearing assembly as noted on sheet 24 of 61 Section A-A to a total of 14.0” in the locations that list 6.0” and 12.0”?
Inquiry submitted 05/24/2013

Response #1:Submitted for consideration.
Response posted 05/28/2013


Response #2:Please bid per current contract plans.
Response posted 05/29/2013




Inquiry #13: Reference Special Provisions page 38 and 39 - Traffic Charts No 10 and 11. The last Note makes reference to "Major Events at Balboa Park". Please clarify when the "major events" occur and the duration of each "major event".
Inquiry submitted 05/26/2013

Response #1:Submitted for consideration.
Response posted 05/28/2013


Response #2:Please bid per current contract plans.
Response posted 05/29/2013




Inquiry #14: Reference Bid Item 70 - JPCP (Mod). Will widening and sealing of the contraction joints be required? If so, where will this work be paid?
Inquiry submitted 05/26/2013

Response #1:Submitted for consideration.
Response posted 05/28/2013


Response #2:The Bid Opening Date is 05/30/13 and an addendum will not be issued. Contractor to bid per the current contract bid documents.
Response posted 05/29/2013






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.