CONTRACTOR'S INQUIRY RESPONSES

April 17, 2000

 

 

 

 

 

Contract No. 04-045034
San Mateo Bridge Highway Widening

 

 

The responses to contractors' inquiries, unless incorporated into a formal addenda to the contract, are not a part of the contract and are provided for the contractor'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 contractors' 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, and any such subsequent response or addenda should be taken into consideration when submitting a bid for the project. Inquiries submitted within seventy-two (72 ) hours of the bid opening date might not be addressed

CALTRANS TOLL BRIDGE RETROFIT PROGRAM ADDRESS

The Caltrans District 4 Office is located at 111 Grand Avenue, Oakland, CA 94612. The mailing address is P.O. Box 23660, Oakland, CA 94623-0660. The Toll Bridge Retrofit Duty Senior telephone number is (510) 286-5549, the email address for Contractor's inquiries is Duty_Senior_Tollbridge_District04@dot.ca.gov, and the fax number is (510) 286-4563. All inquiries must include the contract number.

 

1. May we make copies of the cross section sheets?

*Updated 3/3/00

Yes. Copies of the cross sections are available at BPS Reprographics Services 1700 Jefferson Street, Oakland, CA 94612. The telephone number is (510) 287-5485 and the Fax number is (510) 444-1262.

 

2. I am looking for information on the specifications on item 76 "lightweight Fill"

The specification for item 76" Lightweight Fill" can be found in Section 10-1.34 "Lightweight Fill Material" on page 127 of the Contract Special Provisions.

 

3 Is the quality control portion of the project Caltrans or contractor supplied?

Quality control is always the Contractor's responsibility per the Standard Specifications and the Special Provisions. Sections 10-1.48 and 11 of the special provisions for this Contract add quality control requirements for Type A and Type B asphalt concrete, which are beyond "regular" contract requirements, and for which the Contractor is responsible for providing as specified.

 

4. Does the surface of item 96 get profilographed?

The top surface of Contract Item #96 "Rubberized Asphalt Concrete (Type G)" does not get profiled. Rubberized asphalt is not subject to the QCQA profile requirements, but subject to normal overlay surface tolerances as specified in Section 10-1.51 of the special provisions and Section 39 of the Standard Specifications. The underlying intent is that the underlying asphalt material already meets profile smoothness prior to performance of the rubberized asphalt overlay.

 

5. Does the surface of item 93 and 95 get profilographed?

The top surface of Contract Items #93 "Asphalt Concrete" and #95 Asphalt Concrete (Leveling) do get profiled per Section 10-1.48 of the special provisions. The underlying intent is to obtain a smooth roadway profile prior to placement of the rubberized asphalt overlay.

 

6. Please advise on how to arrange a site inspection of the project. Our request is for access to the underground tunnel and the area adjacent to existing lane 7?

Site tours will be conducted on March 29, 2000 and April 4, 2000 at 11:30am. The tours will be limited to 10 people per tour. To reserve a space on one of these dates contact the Toll Bridge Duty senior by fax or e-mail. The Toll Bridge Duty Senior, fax number is (510) 286-4563 and the e-mail address is duty_senior_tollbridge_district04@dot.ca.gov.

The following is the site tour itinerary:

10:15am Meet at the Caltrans District 4 Office lobby. The Caltrans District 4 Office is located at 111 Grand Avenue, Oakland, CA 94612.

10:45am Leave Oakland and head towards Hayward.

11:30am Arrive at San Mateo/Hayward Bridge Toll Plaza.

11:35am Conduct tour of Toll Plaza area.

12:30pm Leave San Mateo/Hayward Bridge Toll Plaza.

1:15pm Arrive at Caltrans District 4 Office.

All tour attendees are require to have a hard hat and an orange, strong yellow-green or fluorescent colored warning vest. Caltrans will not provide these items.

 

7. Is a soils report including boring results available to the contractor? This information is necessary especially due to the excavation for the cellular concrete being approximately 12' below the water level.

*Updated 4/7/00

Attention is directed to section 2-1.03 of the Standard Plans "Examination of Plans, Specifications, Contract, and Site of Work Area." Arrangements to inspect soils reports and boring logs can be made by contacting the Toll Bridge Duty Senior by fax or e-mail. The Toll Bridge Duty Senior, fax number is (510) 286-4563 and the e-mail address is duty_senior_tollbridge_district04@dot.ca.gov.

The following is a list of the available reports:

Title

Prepared by

Date

Site Investigation Report

State Route 92 Projects

San Mateo and Alameda Counties, California

Geocon

January 1999

Site Investigation Report

State Route 92 Projects

San Mateo-Hayward Bridge Projects

Trestle Approach Widening

Landscape Mitigation

Including Pedestrian Overcrossing

San Mateo and Alameda Counties, California

Geocon

June 1999

Sediment Sampling and Analysis Report

San Mateo-Hayward Bridge Trestle Widening, State Route 92, San Mateo and Alameda Counties, California

Geocon

July 1998

Draft Soil and Groundwater Assessment

San Mateo-Hayward Bridge Seismic Retrofit

San Mateo and Alameda Counties, California

Harding Lawson Associates

April 1997

Supplemental Soil Sampling Results

Route 92-Mt. Eden Overhead and Industrial Boulevard undercrossing, Hayward California

Geocon

January 31, 2000

Site Investigation Report

San Mateo-Hayward Bridge Projects State Route 92 East Approach Widening Alameda County, California

Volume 1

Geocon

October 1999

Site Investigation Report

San Mateo-Hayward Bridge Projects State Route 92 East Approach Widening Alameda County, California

Volume 2

Geocon

October 1999

Sediment Investigation

San Mateo-Hayward Bridge Seismic Retrofit Project

Clayton Environmental Consultants

December 1996

 

8. Does Metro Structure's price of $139,620 for the new toll plaza canopy include sales tax?

See page 318 of the Special Provisions. " The price includes the following Terms and Conditions" under "Administration" "sales tax at rate of 8.25%."

 

9. Does Metro Structure's price of $139,620 for the new toll plaza canopy include installation?

Yes, See page 318 of the Special Provisions.

 

10. Metro Structure's price of $139,620 for the new toll plaza canopy excludes traffic control; so how many nights will it take Metro to complete the work?

Under "Schedule" on page 318 of the Special Provisions, 3-4 weeks is listed.

 

11. Does Metro Structure's price of $139,620 for the new toll plaza canopy include all coatings (prime coat, finish coat, touch up)?

The space frame comes factory finished. Any damage during shipping and construction would be repaired in the field.

 

12. Are submittals (calculations, shop drawings, erection drawings, samples) for the new toll plaza canopy received and approved?

Submittals are yet to be made. They shall be submitted per section 12-1.04, "Submittals" in the Standard Provisions.

 

13. Does Metro Structure's price of $139,620 for the new toll plaza canopy include a complete package for everything above the two concrete columns (metal rib bed footing, fascia system, gutters, tube steel framing for roof, tube steel framing for message board)?

Metro's price includes only the items listed on page 318 of the Special Provisions; namely the space frame. Metal Roof Decking, fascia, and other items are found elsewhere in the Special Provisions.

 

14. Will a pedestrian bridge over Hwy 92 be added to this project; if true, will bid opening be delayed?

Bid the contract according to the plans and specifications.

 

15. We would like to know if the cross-sections for "CR1" Line (off-ramp to Mt. Eden) and "IBR1" Line (on-ramp from Industrial Blvd) are available for contractors. We copied a set of cross-sections from you (2 weeks ago) but somehow the two lines mentioned above are not included.

Yes. Copies of the cross sections for "CR1" Line (off-ramp to Mt. Eden) and "IBR1" Line (on-ramp from Industrial Blvd) are available at BPS Reprographics Services .1700 Jefferson Street, Oakland, CA 94612. The telephone number is (510) 287-5485 and the Fax number is (510) 444-1262. There are 8 sheets.

 

16. Discrepancy in seed quantity per hectare, pg. 138-- chart at top of pg., total seeds = 116kg and bottom chart = 121kg. Are seed quantities correct?

Please refer to addendum 1.

 

17. Rate of application of fertilizer not given or shown.

Please refer to addendum 1.

 

18. Estimated quantities on pg. 6 and 7 vary too much when calculated at per hectare rates:

Line 81: Fiber 5960kg @ 1120kg/hec (two applications) = 5.32hec

Line 83: Seed 550kg @ 116kg/hec or 121kg = 4.74hec or 4.55hec

Line 85: Binder 1070kg @ 135kg/hec = 7.93hec

Line 80: Straw 22tonn @ 4tonn/hec = 5.5hec

I think line 85 and 80 should be equal

Please refer to addendum 1.

 

19. What is the size of the Machine Control System Matrix?

Please refer to addendum 1.

 

20. Where in the DEC will the Machine Control System Matrix Switcher reside? The components for this aspect of the switcher are the same size as the Analog Video portion. As an example, a similar system recently installed in the Walnut Creek TOC required the full DEC to accommodate both the video and controller matrices.

Please refer to addendum 1.

 

21. The Specification states "Control Panels shall be available..." Does this mean they shall be available from the manufacturer for installation at a future date, or that they shall be available to the Operator as part of the equipment covered in this bid item. How many panels would need to be provided and what type?

Please refer to addendum 1.

 

22. What machines will the Machine Control Panels be controlling? The control panels described are designed to operate Video Tape Machines and telecine equipment. These panels are not applicable to Caltrans CCTV under the current installation parameters. Again, using Walnut Creek as an example, the UCP panel installed with the Switcher controlled both the video and data section of the Matrix Switcher. The switching requests were sent over the common command bus as described in the Specification under "Matrix Control System".

Please refer to addendum 1.

 

23. The specifications on item 71(F) "lightweight Backfill"

Please refer to addendum 1.

 

24. Will bedding material be required on this job for culverts with cover less than 3 meters deep? The Standard Plans A62-D show no bedding material until method 3.

No.

 

25. Is structure backfill for culverts the same material as the excavated trench material, or is it another kind material?

Refer to Standard Specifications, dated July 1995, for "Structure Backfill" (Section 19-3.06).

 

26. Item 175-- 1.2 chain link fence, spec's on page 203, C-34 Construction Details for post and anchorage. Where is the detail for attaching fabric and fittings to square posts? There's no square fittings. do you want this to be bid and chain link railing under section 83 of railings?

*Updated 4/7/00

Bid the contract according to the plans and specification. Refer to Standard Specifications, dated July 1995, for "Chain Link Fence" (Section 80-4).

 

27. Pg. 101 states HOV lane(s) has certain hours it must be open. Is this correct? Cannot perform work such as stair ex. w/shoring and still maintain lane. Lane needs to be permanently closed until #8 island floating slab complete. Possibly shift HOV to lane 7 for duration.

HOV lane must remain open during the restricted hours indicated and it can be closed during the non-restricted hours and weekend. For specific issues not covered on project plans or special provisions, Contractor should discuss with the Resident Engineer directly.

 

28. Where can I find lane closure procedure for closing lane(s) at approach to toll plaza?

Lane closure procedure is addressed in the plans and the special provisions.

 

29. Plan sheets #23-37, C-1 to C-15, what does the elevation at the centerline of the concrete barrier represent? I am trying to calculate the barrier height offset.

The elevations represent pavement elevations.

 

30. I find no detail of Item #90, CB Type 60C Modified. What is modified?

See detail on plan sheet 56.

 

31. AO-4 351/440 "Contractor Notice"..."Final Color" to match (E). (E) paint faded, covered w/debris, modeled. Does (N) canopy need to match faded color less debris. Suggest hot water pressure wash (E) for accurate match and more consistent w/old and new.

The specification for "Space Frame Canopy" on page 318 of the Special Provisions under "MATERIALS" item 2. lists the color as "selected from Mero's palette of available colors to match existing."

 

32. Where, or how can the soil boring reports be reviewed? Where are the located? Can copies be made?

Please refer to the response for bidder inquiry #7.

 

33. How and when will information be available about what contractor(s) has won the bid for the lane widening job at the San Mateo Bridge? Is there any available avenue to get information about bid results for all Caltrans jobs?

Information about Caltrans jobs can be found online at the Caltrans Engineering Service Center. You can either search for awarded contracts or , under Ads for Bid, check for preliminary bid results.

 

34. Please reference CDOT response #29, pavement elevations. Type 60C Barrier is variable in height, and bordered by two distinct pavement elevations. Only one elevation is given in the plans.

The one elevation given from Station NT 124+70.8 to 142+11 shows the pavement elevation at the edge of shoulder. The elevation on the other side of the Type 60C barrier can be estimated from the cross sections.

 

35. Note 9, page X-1 (2 of 440) "Hazardous material can be placed in median between 138+70-152+20". Can the hazardous material be placed in the median starting at Sta 121+00? If no, why not?

No. Placement of hazardous material requires a minimum two feet separation from the high groundwater level. According to our information, this can be acheived by the placement limits in the plans.

 

36. Is a detail available for the new water line and sewer between Sta 115+80 and 120+60 (how does the lightweight concrete section conflict with the new pipe)?

Refer to detail shown on sheet 142A. The cellular concrete would go around the encasement of the new pipes.

 

37. What is a treadle? What is its' dimensions? It is shown to be removed on contract plan sheet ST1-4.

A treadle is a piece of equipment embedded into the concrete to help count vehicle axles. A new one is being installed so you can look at sheet EE-16 to get an idea. You should take a site visit to satisfy yourself as to the exact dimensions as described in the Standard Specifications section 2-1.03, "Examination of Plans, Specifications, Contract, and Site of Work."

 

38. Please direct me to the plan sheet number with the % slope for the new sewer line or is this a force sewer?

It is a force sewer.

 

39. Designated portion of the work from WOS Sta 12+03 to 14+81 does not show toll booth/lane expansion work. Does item 221 work occur during this period? If not, when?

The toll booth work isn't part of the designated portion of the work, but it does occur during phase one (plan sheet SC-1).

 

40. Has contract 04-045024 been awarded? If so, where is there toll plaza work?

No.

 

41. In Addendum 1, "Designated Portion of Work"; "Contractor shall complete...utility relocation": does this mean the portion of sewer/water line in stage III work should be completed prior to stage I work or during stage I work?

Refer to the Stage Construction sheets in the Contract plans.

 

42. Plan sheet 142A shows 200mm casing. Is this for total pipe length and if so, what type of casing?

PVC casing is only required as shown on sheet 128 within the traveled way from WOS 12+5.4 to 12+8.9.

 

43. Plan sheet 142A refers to sewer/water details on C-34 and X-3. Don't see any details (Where are the details)?

The Notes refer to the AC Planing At Conform detail on sheet C-34 and the Typical Cross Section detail on sheet X-3 since we did not repeat details of the structural section on sheet 142A.

 

44. The ratio of best estimated work under/over within 50ft of tracks is "1.00," 100% of contract value?

Please refer to addendum 2.

 

45. We need clarification on your roadway excavation, and excavation hazard material quantities. From our take off it looks like CDOT may of included all of the excavation of hazard material in the roadway excavation item. Did CDOT subtract .3 M, and .6 M from the o.g. on the cross sections in order to calculate the roadway excavation quantity.

The quantities for Roadway Excavation and Excavation Hazardous Material were calculated separately.

 

46. Please advise us as to make and model of the Weather Station required in section 10-3.48 page 261. More precisely the precipitation sensor, power requirements/soloar requirements, datalogger, telemetric devices, and tower.

Instruments required to put together the Weather Station as required in the Contract Special Provisions, are standard instruments. There are several makes and models that can be obtained through companies that carry "Weather Monitoring Instruments."

 

47. We were under the impression that this was to be a competitive bid project. However, on page 317, it states that "arrangements have been made to insure that any successful bidder can obtain the space frame from the following source: Mero Structures..." The spec also state that "The lump sum price quoted by the distributor for the space frame, fob San Mateo is $139,620.00 including sales tax." On the next page it goes on to list but what Mero will and will not include but clearly states that Mero has included labor to install in their price of $139,620.00. It appears that a mistake has been made. Instead of writing a specification, someone has mistakenly copied the Mero proposal and revealed their proposal type.

Mero is a competitor of Delta Structures. Delta Structures engineers, fabricates and installs space frame systems the same as Mero...Nationally and overseas. So we have two possibilities here...Either Mero already has the contract or it has been promised to them, or an addendum has to be issued opening the specs to alternate manufactures to submit their own bids. If Mero already has the contract, why would you need a bid from us?

This contract is competitively bid. The Public Contract Code provides for the incorporation of proprietary items under certain circumstances, such as the Mero space frame in this particular circumstance.

 

48. Who can we coordinate with potholing of the median for 04-045034? We will need to close the shoulder for 2-3 hours.

Potholing will not be available. Please bid according to the project plans and specifications.

 

49. Special Design Foundations are indicated on plans for OH S/S #B, O, P, X, & Y. Details are shown for #B, O, & P on S-12. No details are given for #X & Y. Final Pay Quantities for Items #64 an 70 only represent the work for #B, O, & P.

Will details for OH S/S #X & Y be given, and the Final Pay Quantities increased?

Please bid according to the project plans and specifications.

 

50. Please clarify: Drawing E-20; excavation, furnish CL400C piles, drive CL400C piles, construct concrete foundation including reinforcing steel, and backfill is paid for under Item 203(s), Traffic Operation System, Lump Sum.

The work involved on sheet 255 (E-20) is paid under "Item 198 Lighting and Sign Illumination (Location 1)," according to Special Provisions. (See 10-3.47 Payment in the Special Provision.)

 

*Bidder Inquiry # 1 Response Updated 3/3/00

*Bidder Inquiry # 26 Response Updated4/7/00

*Bidder Inquiry # 7 Response Updated4/7/00