California Department of Transportation

Contract 10-3169E4

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.

Q) Are cross sections available for this project and where do we obtain them?

A) Copies of cross sections are available by ordering from Stockton Blue Reprographics, located at 1421 N. El Dorado St. in Stockton, CA 95202. Contact Don Rader at (209) 464-8724; Fax: (209) 464-8739.

Q) There is a lack of existing/design cross sectional information for basins 1 through 6. According to the drainage details shown on sheets 94 & 95, the distance from ES to R/W varies. The available cross sections only show design data from the HP to the toe of slope of the basin. There is a lack of existing/design information between the ramps and the mainline to quantify these areas of excavation. Are contour grading sheets or additional cross sections available for basins 1 thorugh 6?

A) The following resources were used for determining earthwork quantities and are available to bidders: Cross sections for Ramps A, B, C, and D and Route 99; Drainage Plan sheets D-3, D-7, D-8, D-11, and D-12, and Drainage Detail sheet DD-3. The cross sections show the proposed grade down to the toe of slope of basin. However, the existing grades extend well beyond the toe of slope and the proposed basins are flat beyond the toe of slope (see Drainage Layouts). Therefore, there is enough information, when combining the ramp and Route 99 cross sections to come up with quantities for the four interior basins.

Basins 1 and 3 (exterior basins) contain cross sectional information in the Route 99, Ramp C, and Ramp D cross sections. There are some areas in these two basins that the ramp wanders far enough away from the railroad right of way where the Ramp C and D cross sections don’t cover the full distance due to lack of page space. However, the terrain is flat in that area, and the proposed basins are flat until they rise again near the railroad right of way (see DD-3).

Q) UD-1 (sheet 131) of the plans shows how the Arena Canal is extended via a 1980-mm RCP pipe to tie into the existing Dbl 5' x 6' box culvert under existing Hwy 99. The pipe is paid for under Item 91, however, there is a considerable quantity of concrete work involved in constructing the transition structure that I cannot account for in any of the summary of quantities. It is a sizeable structure and I cannot see the concrete quantity reconciled in either the drainage quantities under minor concrete, minor structure or elsewhere on the summary of qty's. The special provisions do not address it either. Where is this structure to be paid for?

A) Refer to Section 10-1.50 of the special provisions for "Reinforced Concrete Pipe." The last paragraph states: "Full compensation for constructing outlet structure shall be considered as included in the contract price paid per meter for the reinforced concrete pipe involved and no separate payment will be made therefor."

Q) Please provide additional staging drawings for the Southern Transition to existing Hwy 99. The stage drawings do not address how to handle traffic with an 18" dropoff adjacent to live traffic. It appears there should be additional K Rail installed for Stage 1A, 2 & 2A.

A) Design does not anticipate a drop-off situation to occur. Note that Temporary Railing (Type K) is shown on Traffic Handling plans, Sheets TH-3, TH-4, and TH -5 for Stage 2 construction.

Q) while constructing "Sultana Drive OH Bridge", should we provide 2 traffic openings for both the existing and future railroad tracks? Is the future railroad track to be constructed after the bridge construction or else? Please clarify.

A) Please refer to the contract Special Provisions Section 13, "Railroad Relations and Insurance Requirements." Falsework openings for future railroad tracks are not specified for this contract.

Q) Per Revised Standard Plan RSP A35B, Note 3. 38 mm dia. dowels are to be used with pavement thickness greater than 215 mm. For a pavement thickness less than 215 mm, use 32 mm dia. smooth epoxy coated dowels. Typical Cross Sections on plan sheet 2 show that the shoulders vary in thickness due to the increased slope from that of the travel way. Therefore the thickness in the shoulders vary from 260 mm to 170 mm in the outside shoulder and from 260 mm to 140 mm on the inside shoulder. It will be impossible to place the dowels as specified. Since the shoulder is not intended to be used as a future travel lane, it our recommendation that dowels not be required for the shoulder areas. Please advise.

A) An addendum has been requested to address this issue.

Q) Due to the varying depth of the concrete pavement in the shoulders, the above specified requirement will be impossible to achieve. If the dowels are placed on baskets, the bars will be at a set distance from the base or if a mechanical inserter is used the bars will be a set distance from the pavement surface. Please advise.

A) An addendum has been requested to address this issue.

Q) Referring to Section 10-1.38 of the Special Provisions, what is the intent of this specification? It is assumed that white pigmented curing compound, ASTM Designation C309, Type 2, Class A, can be used as a bond breaker for the dowels. The application rate as specified is based upon applying the curing compound to the surface of the pavement. Please explain how we would apply curing compound to the dowels at the approximate rate of one liter per 3.7 m2.

A) The intent of "Bond Breaker" in Section 10-1.38, "Concrete Pavement," of the special provisions, is to require application of a bond breaker for dowels, and to specify what type of bond breakers are acceptable. The specified spread rate for white-pigmented curing compound is approximate and applies to the surface area of the dowels.

Q) On plan sheet E-1 and E-2 sheets 196 and 197 there is some conduit and pull boxes identified as IRRIGATION. How will this work be paid for and under which item?

A) In the absence of separate item, this work should be included in the lump sum item for "Lighting and Sign Illumination".

Q) he area bounded by Frontage Road (station 704+60-707+80), Sultana Drive (station 110+40-109+00) and Route 99/Ramp B (station 505+00-508+70) shows no construction activity. Does that area (interior of Frontage Road, Ramp B and Sultana Drive) require clearing of the existing orchard? Can that area be utilized for temporary stockpiling and/or construction activities?

A) The triangular parcel framed by the Frontage Road, Ramp B, and Sultana Drive is private property (note R/W lines identified on Sheet L-3, L-8, and L-9). Therefore, no construction activity will be allowed within those limits.

Q) The time allowed for completion of the project is 450 working days. However, the Special Provisions (Section 10-1.09 Obstructions) spell out 192 working days that must be allowed for various utility relocations during the course of the project.

We feel that 450 working days minus the 192 day provision for utilities (for a net of 258 working days) is unrealistic given the nature, size, and complexity of the project. While we understand that delays will be compensated as right-of-way delays, the 258 days of uninterrupted construction activity will not be adequate. Please consider either extending the time for completion or, in the alternative suspending working days during the utility relocations.

A) Due to the locations and the extent of the work for the above-mentioned utility tasks, they are not expected to delay or interfere significantly with the Contractor's work. Therefore, time of completion will not be extended.

Q) Plan sheet E-1 sheet 195 of 260, Note 9 asks for an OH illuminated sign, 2-85 W Induction Lighting Fixture, with Type 505A Control. What is a Type 505 A control?

A) Bid in accordance with the contract plans and specifications.

Q) Plan sheet E- 4 sheet 198 of 260 shows a project note 11.However, the project notes on E - 1 stop at 9. What is project note 11 intended to read?

A) Bid in accordance with the contract plans and specifications.

Q) How will the irrigation crossovers be paid for and under which bid item? Irrigation Crossovers should not be part of the electrical bid item since Irrigation is not relevant to electrical.

A) Refer to Section 20-5.05, "Payment (Irrigation Systems)" of the Standard Specifications: "When the contract includes separate items for performing irrigation system work, the irrigation system work will be paid for at the contract lump sum or item prices for the items of work involved and identified." The conduit type identified on Sheet Q-5 (Sheet 194 of the plans) is "Bituminous Coated Corrugated Steel Pipe." Therefore, irrigation crossovers will be paid under Item No. 92 for "250 MM Bituminous Coated Corrugated Steel Pipe (1.63 MM Thick)."

Q) Addendum #1 has postponed the bid date to September 27, 2005 at 2:00 PM. The Route 99/201 Separation and Widening project at Kingsburg/Selma (Caltrans 06-350704) is also bidding on 9/27/2005. We are bidding both these projects and we understand that several contractors are bidding both projects. We cannot bid both projects on the same day at the same time and there is no reason to have both Route 99 projects bidding on the same day. We respectfully request a two-day postponement to the bid date from September 27th to the 29th.

A) An addendum is being processed for Contract 06-350704 which will include the new bid opening date of 10/04/05.
Addendum No. 2 for Contract 06-350704 , issued September 20, 2005, postpones the bid opening date to 10/04/05. The bid opening date for Contract 10-3169E4 is still the same (09/27/05) per addendum number 1.

Q) What are the payment methods for the three seperate application methods of Erosion Control? In the Special Provisions, it list three methods of application; Erosion Control Type C, Erosion Control Type D, and Erosion Control Drill Seed. Normally there is a seperate bid item for Erosion Control Drill Seed.

A) Refer to Section 20-3.07, "Payment (Erosion Control)" of the Standard Specifications: "Items of work, measured in conformance with the provisions in Section 20-3.06, "Measurement," and Section 9-1.01, "Measurement of Quantities," will be paid for at the contract prices per tonne or cubic meter for imported topsoil, and per kilogram or tonne for straw, commercial fertilizer, pure live seed, fiber and stabilizing emulsion."

Q) Item # 50 list 1200 KG of Pure Live Seed which is approximately 31 ha. There is nothing in the plans or special provisions that display a breakdown for each method of Erosion Control. What is the quantity of area for Type C, D, and Drill Seed?

A) Erosion control quantities are normally calculated for all disturbed soil areas. Therefore, the Engineer's Estimate for the items for straw, fiber, pure live seed, commercial fertilizer and stabilizing emulsion provides the total estimated quantity for all of the Type C, Type D, and Drill Seed Erosion Control applications.

Q) The scope of work for the Arena Canal extension is unclear. Please clarify the scope of work and timing. The plans indicate that 3.81M of box and outlet structure are to be placed by others in Stage 1 and removed in Stage 2. Who is responsible for the removal, others or the Contractor? When does the headwall get removed and who is responsible for its removal? Is this essentially going to be a siphon when completed (will flowlines match)? How long will work by others take to complete? Is the canal flowing all the time? When is the irrigation season? Will a collar be rquired at the point of connection Sta 516+57.60?

A) The Arena Canal as shown on Sheet UD-1 of the plans will perform as a siphon, as approved by the Merced Irrigation District (MID). The outlet structure will serve as a connection collar. Placement of the canal extension will be done by MID during Stage 1. Refer to Section 10-1.09, “Obstructions,” of the special provisions, which indicates 40 working days for coordination with MID (the Arena Canal dry season varies). Removal will be done by the Contractor during Stage 2. Quantities for removal of the existing drainage facilities are shown on Sheet UD-1, and will be paid under Item No. 34, “Remove Headwall” and Item No. 40, “Remove Box Culvert.” Refer also to Section 10-1.24, "Existing Highway Facilities," of the special provisions, “Remove Drainage Facility.”

Q) The engineer’s estimate shows a quantity of 6400 meters broken down into PG&E Gas, Telephone Conduit, and Irrigation on the summary of quantities table. The Utility Plan indicates these same items to be “ABANDONED BY OTHERS”. Is the contractor or the utility company abandoning the utilities?

A) Relocation work will be done by others as specified in Section 10-1.09, "Obstructions," of the special provisions and where shown on the plans. Abandon pipeline will be done by the Contractor. Please bid in accordance with the Engineer's Estimate for Item No. 19, "Abandon Pipeline."

Q) The specification for the removal of Portland cement concrete pavement does not mention anything about the CTB below the PCC. Are we required to remove the CTB as well? If so, shouldn't the quantity be adjusted to reflect this?

A) Removal of cement treated base (CTB), as well as removal of base and surfacing, was included in the roadway excavation quantity, and will be measured and paid for as Roadway Excavation.

Q) Referring to the Remove Base and Surfacing specification, "resulting holes and depressions shall be backfilled with earthy material selected from excavation...". Are there any areas in which the PCC removal will need to be backfilled? If so, shouldn't the Import Borrow quantity be adjusted to reflect the additional quantity?

A) Refer to Section 10-1.26, "Earthwork," of the special provisions, which states that "the quantity of imported borrow to be paid for will be that quantity remaining after deducting the adjusted quantities of excavation from the total embankment quantity." Refer also to Section 19-2.08, "Measurement," of the Standard Specifications, which states "excavation in excess of the planned or authorized cross section will not be paid for."