California Department of Transportation

Contract 10-0H04U4

The responses to bidder's inquiries, unless incorporated into a formal addendem 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 availability or use of information provided in the responses to bidder's 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.

Q1) How do we get the cross-sections and the other information listed as available to bidders in section 5-1.10 SUPPLEMENTAL PROJECT INFORMATION?

A1) Copies of cross sections can be purchased from Stockton Blue Reprographics, Phone (209) 464-8724. The same cross sections may be viewed at the District's Construction Office in Stockton by making an appointment with the Duty Senior at (209) 948-7849. The following documents are included in the Information Handout as part of the Bid Package, and are also available for inspection by making an appointment with the Duty Senior: Department of Fish and Game Agreement; California Regional Water quality Control Board Permit; US Army Corps of Engineers, Nationwide Permit No.23. A copy of the Dust Control Plan is also available for inspection.

Q2) There is no mention of the structural section for driveways no. 1-3, only final quantities are given (sht. 146). Please provide structural section thickness so an accurate analysis can be obtained.

A2) The structural section for the driveways is the same as shown for Tracy Boulevard on the Typical Cross Sections, Sheet X-4, and on the supplemental cross sections for the driveways.

Q3) The typical x-section shown for Rte. 4 construction from sta. 31+40 to 34+40 as shown on plan sheet 2 of 171 does not seem to match the layout within the same stations as shown plan sheet 13 of 171. The layout shows the left side shoulder section continuing through sta. 34+40, a wider roadway section between left and right ETW up to sta. 33+40, the roadway section between right and left ETW stopping at station 33+40, the HMA overlay begining at sta. 33+40, and the HMA overlay straddled by the left and right side shoulder sections between sta. 33+40 to 34+30, all of which are in conflict with the typical cross section. Please clarify and provide any additional details that may be required.

A3) Refer to the supplemental cross sections for a depiction of the planned excavation and new structural section for the area in question. The estimated roadway quantities are based on these cross sections. If changes are necessary, they will be handled by proposed Contract Change Order.

Q4) The detail on Plan Sheet 26 shows a 1200 mm high Temporary Fence with High Visibilty Fabric to be installed along both sides of the existing Fiber Optic or 600 mm RCP. Special Provision Section 10-1.08 TEMPORARY FENCE states that "...temporary fence shall conform to the specifications for permanent fence of similar character as provided in Section 80, "Fences" of the Standard Specifications." Please clarify the type of fencing to be installed as Temporary Fence under Bid Item No. 4.

A4) The temporary fence is intended for protection of the existing fiber optic line, and shall be constructed with high visibility fabric as shown on Construction Details C-2 (Sheet 26 of the plans). Refer to Section 10-1.08, "Temporary Fence," of the special provisions and Section 80, "Fences," of the Standard Specifications provides for additional requirements.

Q5) Project Spec. Section 10-1.35 (P. 93) states that surcharge embankments shall be constructed on Rte. 4 Sta. 10+00 to Sta. 34+00. The traffic handling plans detail construction of Rte. 4 in multiple stages including areas of construction performed under one-way traffic control. The consolidation details provided on plan sheet 25 of 171 show the surcharge embankments near existing Rte. 4 specific to stage 1 construction only. Are surcharge embankments required for each stage of Rte. 4 construction or are they specific to the areas of Rte. 4 construction only available during stage 1 construction?

A5) Placement and consolidation of the surcharge will take place only during Stage 1. Subsequent stages cannot begin until the surcharge settlement period is complete.

Q6) Plan sheets 86, 87, 88, and 91 provide sectional views of the proposed embankment and surcharge construction along Rte. 4 and Tracy Blvd. during stage 1. These details show the 1.5 m surcharge measured from finish grade and reference plan sheet C-1 for information. Plan sheet 25 (C-1) shows the 1.5 m surcharge measured from the import borrow limit line, which would be the grading plane (subgrade). Please clarify where the 1.5 m surcharge is measured from.

A6) Per Section 10-1.35, "Earthwork," of the Special Provisions, "Surcharge embankments shall be constructed at or above the grading plane." Refer also to Construction Details C-1 (Sheet 25 of the plans).

Q7) I cannot find a specification for the Subgrade Enhancement Fabric in the Special Provisions or Standard Specifications. Please provide direction to the specifications for this item or provide the specifications for the Subgrade Enhancement Fabric.

A7) Refer to Section 88, "Engineering Fabric," of the Standard Specifications, for woven rock slope protection fabric, Type B.

Q8) I cannot find any detail for Shoulder Backing in the plans. Please provide the details referenced in the first sentence of Special Provision 10-1.38 "Shoulder Backing". Also, please provide the limits of Shoulder Backing to be included in the Bid Item.

A8) Refer to Addendum No. 2, dated August 20, 2009, for revised Typical Cross Section plans.

Q9) Spec section 5-1.17 Giant Garter Snake Protection, requires us to complete all work within irrigation canals and waterways to be done between 5/1 and 10/1. Spec section 10-1.01 Order of Work defines our work period in irrigation sytems and temporary easements (canals and drainage features) to occur from 8/1 to 1/1. Which is correct?

A9) Both are correct and represent separate interests. The restriction specified in Section 5-1.17 "Giant Garter Snake Protection" refers to work within or directly adjacent to the existing irrigation ditches, and the restriction specified in Section 10-1.01 "Order of Work" refers to irrigation work and work within the temporary construction easements shown on the plans. Refer to revision to Section Addendum No. 2, dated August 20, 2009.

Q10) How can bidders obtain a copy of the geotechnical report for this project?

A10) Refer to the Information Handout included as part of Addendum No. 2, dated August 20, 2009:

Q11) Project Spec. pg. 94 states that removal of surplus embankment materials placed as a settlement or surcharge embankment will be paid for as roadway excavation. The Engineers estimate for bid item 39 (Roadway Excavation) is 11,300 M3. Does this estimated quantity include anticipated surplus settlement or surcharge embankment material? If so, how much?

A11) The estimated quantity for removal of the surcharge embankment is based on its theoretical design as shown on the plans.

Q12) Is the intent of this sentance("Imported borrow for constructing preload fills shall be compacted to a minimum density of 17.3 kN/m3.") to be a compaction requirement or a density requirement of the import borrow. Typically compaction requirements are stated as 90 percent or 95 percent, not as kN/m3.

A12) The compaction requirement for the preload fill is a density requirement, as specified in Special Provisions Section 10-1.35, "Earthwork," whereas the compaction requirement for the embankment is actually a "relative" compaction that is a ratio of in-place density to the maximum density, measured as a percentage. Refer to Section 19-5, "Compaction," of the Standard Specifications.

Q13) Plan sheet 25 of 171 details a profile view and spacing plan view for the typical wick drain installation requirements. The details provided do not specify a typical distance from proposed toe of slope to installation of the nearest wick drain. How far from the proposed toe of slope should the wick drain installation start?

A13) Refer to Note 3 on Construction Details C-1 (Sheet 25 of the plans): "Wick drains to be placed where fill exceeds 1 m in height."

Q14) Plan sheet 25 of 171 provides a detail for consolidation near existing Rte. 4. Specific to this detail, how far from the catch point of the existing slope should the wick drain installation start?

A14) Again, refer to Note 3 on Construction Details C-1 (Sheet 25 of the plans).

Q15) The utility drawings (plan sheets 77 to 84) show an exsiting AT&T buried cable to be abandoned. There are no abandon details, bid items, or specification requirements provided for this work. Please clarify what is meant by abandonment of this line.

A15) Refer to Special Provisions Section 5-1.18, "Nonhighway Facilities (Including Utilities)," as revised by Addendum No. 2, dated August 20, 2009. The utility company, AT&T, will be responsible for abandonment of their facilities, once their new facilities are in their new location.

Q16) In the application table on page 100, compost is to be applied at 1200 M3/HA. Is this application rate correct? The depth of the compost dry-applied will be nearly 5 inches deep. Please clarify.

A16) The application rate specified for compost under subsection "Application" in Special Provisions Section 10-1.39, "Erosion Control (Type C)," is a typographical error. No further addenda are anticipated prior to the bid opening. Therefore, if changes are necessary, they will be handled by proposed Contract Change Order.

Q17) On Drainage Details the diameter shown for the Reinforced Concrete Junction structure is ahown as being 1.7min in one detail and two outher details show 1200mm as the outside diameter. Please clarify.

A17) Reference Drainage Details DD-1 (Sheet 64 of the plans). The Reinforced Concrete Junction Box should have an outside diameter of 1200 mm.

Q18) Bid Item #61 calls for 400mm Reinforced concrete pipe. That size is not made. What is made is, 375mm or 450mm, Please clarify.

A18) Please Submit a bid based on the work item quantities the Department shows in the Bid Item List. If a change is necessary it will be done by proposed Contract Change Order.

Q19) Specification Section 10-1.35.C (Imported borrow) does not specify the settlement anticipated by the Engineer. To assist in determining the quantity of roadway excavation of surcharge material to be removed, please provide the anticipated settlement value utilized by the engineer.

A19) Refer to the Geotechnical Design Report, dated May 25, 2006 (Table 1, page 5), included in the Information Handout as part of Addendum No. 2, dated August 20, 2009.

Q20) Specification Section 10-1.35 specifies surcharge embankments are to be installed at or above the grading plane to a height of 1.5 meters. It also specifies that borrow for constructing preload fills shall be constructed at the maximum loading rates of: 1.5 meter initially placed; 0.3 meter per week for 10 weeks; and 0.15 meter per week thereafter. Are the supplemental lifts noted above, after the initially placed 1.5 meter of surcharge material, to continue throughout the settlement period to maintain the full surcharge height?

A20) No. The surcharge height is placed only once. Once the settlement period begins, no additional Imported Borrow is to be placed.

Q21) Where can subcontractors obtain a planholders listing?

A21) Refer to the California Department of Transportation web address:

The Office Engineer database search information allows you to scroll down and input the contract number and records for Planholders for Currently Advertised Projects."