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Viewing inquiries for 08-1F7304
Submit new inquiry for this projectInquiry #1: On sheet 257 of 341, are we allowed to use the California Wide Flange girder in lieu of the California Bulb Tee girder? Could Caltrans provide an alternate design using the WF girder?
Inquiry submitted 11/12/2020
Response #1:Submitted for consideration
Response posted 11/12/2020
Response #2:Wide Flange girder is not allowed due to aesthetics constraint. Please bid per the current contract documents.
Response posted 11/17/2020
Inquiry #2: Sheets 8 and 9 of 13 for Retaining Wall No. 105 (at the Traffic Signal) are not included.
Please provide.
Inquiry submitted 11/16/2020
Response #1:Submitted for consideration
Response posted 11/16/2020
Response #2:Your inquiry is being reviewed. Unless an addendum is issued addressing your concern, please bid per the current contract bid documents
Response posted 11/25/2020
Inquiry #3: You do not need to post this inquiry. For clarity, please indicate the name of the bridge on the cover sheet where "Name of Bridge" is currently shown.
Inquiry submitted 11/16/2020
Response #1:Submitted for consideration
Response posted 11/16/2020
Response #2:Washington Street OC, Bridge No. 54-1355
Response posted 01/06/2021
Inquiry #4: We would like to request the original ground data. A CAD or XML would be preferred.
Inquiry submitted 11/25/2020
Response #1:Submitted for consideration
Response posted 11/25/2020
Response #2:Original ground data (Cadd format .dgn) provided in addendum No.1
Response posted 01/06/2021
Inquiry #5: Please provide the structural section for the Temporary Pavement, as shown on the Staged Construction Sheet Stage 1, Phase B (57 of 341).
Inquiry submitted 11/30/2020
Response #1:Submitted for consideration
Response posted 12/01/2020
Response #2:Please bid per current contract documents
Response posted 12/18/2020
Inquiry #6: In reference to Division VIII; Section 78-4.04 for Staining Concrete and Shotcrete.
Will an AMS or FED 595 std be provided for the stain color onto retaining walls, barriers, and bridge concrete?
Additionally, on Drawing Set 201-300 Pg. 71-72 a "Dark Gray" is noted for the Recessed Letters, can Cal Trans select an AMS/FED 595 Std Color for that scope as well?
Inquiry submitted 12/03/2020
Response #1:Submitted for consideration
Response posted 12/03/2020
Response #2:ASM STS 595 36081 is for recessed letters
Response posted 01/06/2021
Inquiry #7: Per sheet 17 of 368 of the project specifications - "Notice To Bidders", the work is to be completed including and excluding plant establishment in the same 480 working days. It also states that the plant establishment work is 250 working days. Please clarify the duration of the project.
Inquiry submitted 12/10/2020
Response #1:Submitted for consideration
Response posted 12/11/2020
Response #2:The duration of the project is 480 working days. The Plant Establishment is 250 working days and will have to occur within the 480 working days.
Response posted 12/17/2020
Inquiry #8: Existing contours / grades are not shown on the contour grading plans sheet 40. Please provide existing contours / grades.
Inquiry submitted 12/18/2020
Response #1:Submitted for consideration
Response posted 12/23/2020
Response #2:Plan sheets revised, refer to addendum No.1
Response posted 01/06/2021
Inquiry #9: The response to bidder's inquiry #5 states to bid per the contract documents. Please point to the contract document that states the temp structural section. Also the contractor is directed to place Minor HMA. the QTY sheets and Bid Item list do not have a pay item for Minor HMA.
Inquiry submitted 12/18/2020
Response #1:Submitted for consideration
Response posted 12/23/2020
Response #2:Refer to addendum No.1
Response posted 01/06/2021
Inquiry #10: Please provide the water meter charges for bid item 188.
Inquiry submitted 12/21/2020
Response #1:Water charges are a bid item and the bidder should be providing this estimate by contacting a water purveyor.
Response posted 12/22/2020
Inquiry #11: Please make the CAD files available for the bidders with existing and final grade information
Inquiry submitted 12/21/2020
Response #1:This issue will be addressed via an upcoming addendum.
Response posted 12/22/2020
Response #2:Refer to addendum No.1
Response posted 01/08/2021
Inquiry #12: Please, provide correct Grading Plan (G-1) with distinguished Design and Existing contours.
Inquiry submitted 12/21/2020
Response #1:Submitted for consideration
Response posted 12/21/2020
Response #2:Issue to be addressed under upcoming Addendum
Response posted 12/22/2020
Response #3:Refer to addendum No.1
Response posted 01/08/2021
Inquiry #13: Please confirm bid item 183 can use new materials and equipment installed under bid item 181 during stage work.
Inquiry submitted 12/21/2020
Response #1:Submitted for consideration
Response posted 12/23/2020
Response #2:Yes, generally, new materials and equipment installed under bid item 181 during stage work can be used under Bid item 183, specifically, electronic equipment with its hardware, with the exception of temporary poles that cannot be interchanged.
Response posted 12/24/2020
Inquiry #14: Per project sheet no. 243 (‘Washington St OC’ Sheet 4 of 40), the shading for “Special Bridge Removal†does not cover existing piles @ Bent 2. Note 4 does not specifically require removal of any of the existing piles, however, the details on the plan page show some of the existing piles to be in conflict with the proposed CIDH and footings @ Bent 2. Please provide further information regarding the following:
1) Please clarify the required minimum O.C. spacing between proposed CIDH and existing piles.
2) Please clarify which existing piles shown on “Washington St. OC†Sheet 4 of 40 are required to be removed.
3) Please confirm that existing piles specified on the plans as required to be removed will be paid for under bid item 109.
4) Please confirm whether existing piles are allowed to remain in place within the limits of any of the proposed Bent 2 footings.
5) Please provide detail(s) specifying all protect-in-place requirements for existing piles within the proposed Bent 2 footings (reinforcement modifications, expansion material, etc).
Inquiry submitted 12/22/2020
Response #1:Submitted for consideration
Response posted 12/23/2020
Response #2:Please refer to Notes 2, 3 and 4 on plan sheet 243 of 341, and bid per the current contract documents
Response posted 12/23/2020
Inquiry #15: The response to bidder's inquiry #5 states to bid per the contract documents. Please point to the contract document that states the temp structural section. Also the contractor is directed to place Minor HMA. the QTY sheets and Bid Item list do not have a pay item for Minor HMA.
Inquiry submitted 12/22/2020
Response #1:This issue will be addressed via an upcoming addendum.
Response posted 12/22/2020
Response #2:Refer to addendum No.1
Response posted 01/08/2021
Inquiry #16: Please clarify that bid item 188 Water Meter Charges are for the 2 water meters located within the irrigation plans (IP-1 & IP-2) only and no additional water meter cost will be associated with this bid item. If there are additional water meter cost or locations, please clarify the location as this item typical has an allowance and unit (per EA) associated. Please consider revising the bid item to EA and providing an allowance.
Inquiry submitted 12/22/2020
Response #1:An addendum will be issued to address the issue of water meters
Response posted 12/23/2020
Response #2:Refer to addendum No.1
Response posted 01/08/2021
Inquiry #17: The 2nd thru 5th supplemental info documents are not able to be viewed, since they are xml & dgn files, instead of PDF's.
Inquiry submitted 12/23/2020
Response #1:The files referred to are required in their current formats to satisfy Automated Machine Guidance requirements under 2018 Special Provisions Section 5-1.25. PDF conversion is not possible
Response posted 12/23/2020
Inquiry #18: 1. Type 7 MOD - Is there a detail sheet for Type 7 MOD showing materials and assembly?
2. Type 7 MOD on Retaining Walls 103 and 104 details for sheets 309 and 320 do not show arch. Will arch be typical for retaining walls as it is for the bridge?
Inquiry submitted 12/28/2020
Response #1:Q1. Type 7 MOD - Is there a detail sheet for Type 7 MOD showing materials and assembly?
A1. Please refer to plan sheets 270, 309 and 320 of 341, and Standard Plan B11-52.
Q2. Type 7 MOD on Retaining Walls 103 and 104 details for sheets 309 and 320 do not show arch. Will arch be typical for retaining walls as it is for the bridge
A2. Please bid per the current contract documents
Response posted 12/30/2020
Inquiry #19: The working days for the project appear to be insufficient to perform the work required. Since the total working days includes the plant establishment work, all planting must be complete by 230 WD. The planting work area is shown in Stage 2. Compounding the duration of critical path work is the multiple stages and the restriction on fabrication of the precast piles until the dynamic monitoring of production piles. This could consume up to 30 WD per stage of the 230 WD. A realistic baseline schedule could never be produced to meet the 480 WDs as required prior to beginning construction. Please increase the working days to a more realistic value.
Inquiry submitted 12/29/2020
Response #1:Submitted for consideration
Response posted 12/30/2020
Response #2:Please bid per contract documents
Response posted 01/06/2021
Inquiry #20: According to bid items list, item #62 shows 2 each of 3" gate valve. However, irrigation plans sheet IP-1 & IP-2 show one gate valve 2.5" & one 3". Please clarify.
Inquiry submitted 12/30/2020
Response #1:Submitted for consideration
Response posted 12/30/2020
Response #2:Your inquiry is being reviewed. Unless an addendum is issued addressing your concern, please bid per the current contract bid documents.
Response posted 01/06/2021
Inquiry #21: Refer to irrigation plans, symbol of new Armor-clad conductors are shown. However, there is no item for this conductors provided on Bid item list, please clarify which item includes it.
Inquiry submitted 12/30/2020
Response #1:Submitted for consideration
Response posted 12/30/2020
Response #2:Your inquiry is being reviewed. Unless an addendum is issued addressing your concern, please bid per the current contract bid documents.
Response posted 01/06/2021
Inquiry #22: Following up on the answer given for #18.1 (Answer).
Per the standard specifications for B11-52 the arch and bottom rail is not referenced, nor is it in the plan sheets that were called out in the answer. (270, 309 and 320 of 341, and Standard Plan B11-52)
None of these call out any material sizing or method of attaching. Please advise.
Inquiry submitted 12/30/2020
Response #1:Submitted for consideration
Response posted 01/04/2021
Response #2:Your inquiry is being reviewed. Unless an addendum is issued addressing your concern, please bid per the current contract bid documents.
Response posted 01/05/2021
Inquiry #23: Is Addendum No. 2 available?
Inquiry submitted 01/02/2021
Response #1:Submitted for consideration
Response posted 01/04/2021
Response #2:Addendum No.1 posted 12/31/2020
Response posted 01/06/2021
Inquiry #24: Please clarify the sequence/durations of utility work by others. How many working days are required for removing the existing water line shown on Sheet 46? Also, is the 48" water line to be protected in place along the "ALN16" Line as stated in Section 5-1.36C(3) or the "ALN14" Line as shown on Sheet 46?
Inquiry submitted 01/04/2021
Response #1:Submitted for consideration
Response posted 01/04/2021
Response #2:Your inquiry is being reviewed. Unless an addendum is issued addressing your concern, please bid per the current contract bid documents.
Response posted 01/08/2021
Inquiry #25: Which part of the Colton Graphic Motif Panel is Porcelain Enamel? The details indicate a recessed/stained surfaces with no mention of Porcelain Enamel.
Inquiry submitted 01/04/2021
Response #1:Submitted for consideration
Response posted 01/04/2021
Response #2:The whole Colton Graphic Motif is Porcelain Enamel. Please refer to the COLTON GRAPHIC MOTIF PANEL detail on sheet no.309 of the project plans.
Response posted 01/11/2021
Inquiry #26: On Sheet U-1 indicates that the existing 14†CML&C Steel water line (COC-W) is to be “Relocated by Othersâ€. Is this water line to remain in service during the demo and construction of the new bridge? If so, How is the City of Colton planning on keeping the line in service during the demo?
Inquiry submitted 01/04/2021
Response #1:Submitted for consideration
Response posted 01/04/2021
Response #2:Refer to addendum No.1
Response posted 01/08/2021
Inquiry #27: Following up on the answer given for #18.1 (Answer).
Per the standard specifications for B11-52 the arch and bottom rail is not referenced, nor is it in the plan sheets that were called out in the answer. (270, 309 and 320 of 341, and Standard Plan B11-52)
None of these call out any material sizing or method of attaching. Please advise.
Inquiry submitted 01/04/2021
Response #1:Submitted for consideration
Response posted 01/04/2021
Response #2:Your inquiry is being reviewed. Unless an addendum is issued addressing your concern, please bid per the current contract bid documents.
Response posted 01/06/2021
Inquiry #28: Sheet U-1 indicates the existing water line mounted on the bridge is 14†diameter. On sheet 6 of 40 of the Washington St. OC (replace) – Foundation Plan indicates the water line to be 16â€. Please clarify the size of the utility.
Inquiry submitted 01/04/2021
Response #1:Submitted for consideration
Response posted 01/04/2021
Response #2:Your inquiry is being reviewed. Unless an addendum is issued addressing your concern, please bid per the current contract bid documents.
Response posted 01/08/2021
Inquiry #29: There is an existing billboard sign on the southeast corner of the Washington Street OC Bridge, not shown on the plans, which appears to be conflict with the construction of the new bridge approach slab. The plans do not indicate the location of the billboard, nor show if it is to be relocated. Please provide direction on location and relocation if needed.
Inquiry submitted 01/04/2021
Response #1:Submitted for consideration
Response posted 01/04/2021
Response #2:Billboard sign to be relocated by others.
Response posted 01/06/2021
Inquiry #30: Addendum 1 provided the as-built contours needed to bid the earthwork for this project. It was provided at the end of the day on 12/31/2020. Additionally, there are multiple other projects bidding in the next two weeks. There is not enough time to perform take-of and estimate the project between the release of Addendum 1 and the current bid date of 1/12/21. Will Caltrans please postpone the bid date by 2 weeks?
Inquiry submitted 01/04/2021
Response #1:Submitted for consideration
Response posted 01/06/2021
Response #2:Your inquiry is being reviewed. Unless an addendum is issued addressing your concern, please bid per the current contract bid documents.
Response posted 01/08/2021
Inquiry #31: Retaining Wall 105 Footing and CIDH Pile extend into the existing driveway for the shopping center. Will the contractor be allowed to shutdown the conflicting portion of the driveway during construction in Stage 1 or will the Wall need to be built in two stages?
Inquiry submitted 01/04/2021
Response #1:Submitted for consideration
Response posted 01/06/2021
Response #2:Driveway at approximate Station 150+00 "ALN14" will be closed permanently
Response posted 01/08/2021
Inquiry #32: Can the owner clarify the work windows or parameters for the work that is shown at the below location as neither is represented in the phasing?
• West side of the bridge – The intersection at S. Mt Vernon and Washington St.
o ALN 16 Stations: 146+80 to +/- 149+00.
• East side of the bridge – The Washington St
o ALN 14 Stations: 152+42 to 156+82.
Inquiry submitted 01/04/2021
Response #1:Submitted for consideration
Response posted 01/06/2021
Response #2:Your inquiry is being reviewed. Unless an addendum is issued addressing your concern, please bid per the current contract bid documents.
Response posted 01/08/2021
Inquiry #33: The stage construction plan sheets SC-1 thru SC-8 are missing the work from "ALN16" Sta 146+80 to Sta 150+00 and also the East tie in on "ALN14" from Sta 154+00 to 157+28.54. Please provide the stage construction plan sheets for these 2 work areas.
Inquiry submitted 01/04/2021
Response #1:Submitted for consideration
Response posted 01/06/2021
Response #2:Your inquiry is being reviewed. Unless an addendum is issued addressing your concern, please bid per the current contract bid documents.
Response posted 01/08/2021
Inquiry #34: Please disregard the inquiry about the Colton Graphic Motif Panel.
Inquiry submitted 01/05/2021
Response #1:Submitted for consideration
Response posted 01/06/2021
Response #2:Please bid per current contract documents.
Response posted 01/11/2021
Inquiry #35: Addendum 1 provided a Revised Contour Grading Plan, yet failed to address the dirt in front of the Bridge Abutments and how it relates to the freeway. Please provide a plan with these details.
Inquiry submitted 01/05/2021
Response #1:Submitted for consideration
Response posted 01/06/2021
Response #2:Please bid per current contract documents
Response posted 01/11/2021
Inquiry #36: The Typical Cross Sections show 1.5' of Class 2 AB under the proposed curb and gutter, yet the summary of quantities (Engineers Quantities) don't appear to capture this quantity. Please confirm this requirement.
Inquiry submitted 01/05/2021
Response #1:Submitted for consideration
Response posted 01/06/2021
Response #2:Your inquiry is being reviewed. Unless an addendum is issued addressing your concern, please bid per the current contract bid documents.
Response posted 01/08/2021
Inquiry #37: Can the owner clarify the work windows or parameters for the work that is shown at the below location as neither is represented in the phasing?
• West side of the bridge – The intersection at S. Mt Vernon and Washington St.
ALN 16 Stations: 146+80 to +/- 149+00.
• East side of the bridge – The Washington St
ALN 14 Stations: 152+42 to 156+82.
Inquiry submitted 01/06/2021
Response #1:Submitted for consideration
Response posted 01/06/2021
Response #2:Submitted for consideration
Response posted 01/07/2021
Response #3:Submitted for consideration
Response posted 01/07/2021
Response #4:Submitted for consideration
Response posted 01/07/2021
Response #5:Submitted for consideration
Response posted 01/07/2021
Response #6:Your inquiry is being reviewed. Unless an addendum is issued addressing your concern, please bid per the current contract bid documents.
Response posted 01/08/2021
Inquiry #38: Please provide the as-builts and profiles for drainage systems 3 & 4. The current documents do not address the type of inlets that require capping, raise to grate frame and covers, elevations and additional information needed to accurately provide pricing.
Inquiry submitted 01/06/2021
Response #1:Please bid per contract documents. Refer to Caltrans Standard Specifications section 2-1.06 and 2-1.07.
Response posted 01/07/2021
Inquiry #39: Please clarify who is responsible for furnishing the waterline bridge hangers for the proposed waterline that is to be relocated. Will the proposed waterline contractor furnish the hangers or are they part of this contract.
Inquiry submitted 01/06/2021
Response #1:The utility owner (City of Colton) will furnish the hangers.
Response posted 01/07/2021
Inquiry #40: Please clarify the joint material/type between the proposed waterline vault located in the approach slab as it appears the approach slab will be install after the vaults and the vault top will be at finish grade.
Inquiry submitted 01/06/2021
Response #1:Please bid per current contract documents.
Response posted 01/12/2021
Inquiry #41: Sheet C-13 (34 of 341) note 3 references median replacement pavement with a typical section shown on Sheet X-6. Sheet X-6 does not exist; please provide.
Inquiry submitted 01/07/2021
Response #1:Refer to detail on plan sheet C-13, "Typical Cross Section Under the Washington Bridge". Pavement section No.3 is proposed, refer to plan sheet X-1 for structural depth corresponding to section No.3.
Response posted 01/08/2021
Inquiry #42: What is the specification for the type of pedestrian barrier needed? Thank you.
Inquiry submitted 01/07/2021
Response #1:Refer to plan sheet C-17 and Caltrans Standard specification section 56-3.02B
Response posted 01/08/2021
Inquiry #43: Per the revised specification, section 20-5.03C, item no.1, gravel mulch color from Type 1, 2 & 3 must match the referee sample available for inspection by bidders at landscape Architecture Unit. However it appears that bidders are not permitted to the building, also we were not able to get this information from the specified contact. Please clarify gravel mulch color for each type for bidding purposes.
Inquiry submitted 01/07/2021
Response #1:Type 1= Mix light and dark brown
Type 2= Tan
Type 3= Gold
Response posted 01/08/2021
Inquiry #44: Per the revised specification, section 20-5.03C, item no.1, gravel mulch color from Type 1, 2 & 3 must match the referee sample available for inspection by bidders at landscape Architecture Unit. However it appears that bidders are not permitted to the building, also we were not able to get this information from the specified contact. Please clarify gravel mulch color for each type for bidding purposes.
Inquiry submitted 01/07/2021
Response #1:Type 1= Mix light and dark brown
Type 2= Tan
Type 3= Gold
Response posted 01/11/2021
Inquiry #45: what type of drainage inlet protection is expected for this project? what types of inlets are on the project site? T61? T62? T63? or T64?
Inquiry submitted 01/07/2021
Response #1:Type G1 / G2 inlets are on project site. T62 is the expected drainage inlet protection
Response posted 01/12/2021
Inquiry #46: What type of pedestrian barricades are needed for this project?
Inquiry submitted 01/07/2021
Response #1:Refer to plan sheet C-17 and Caltrans Standard specification section 56-3.02B
Response posted 01/08/2021
Inquiry #47: Section 5-1.36 States that a 48" Water line shown on U-1 30' RT of "ALN16" from STA 148+90 to 156+42 and 30' RT STA 148+90 to 110' RT STA 155+48. wil not be rearranged.
Upon review of Sheet U-1 it appears that a 14" water line (COC-W) exists in roughly this position. That sheet notes the 14" Water Line shown (COC-W) is to be relocated by others.
1) Please verify the position and location of the 48" Water Line outlined in Section 5-1.36 of the Special Provisions that will not be rearranged.
2) Please provide details of the water relocation by others as it does not seem to be addressed in Section 5-1.36C(3).
3) Please verify that the 48" Waterline will not be in conflict with the Washington St. OC Bridge Construction.
Inquiry submitted 01/07/2021
Response #1:Please bid per current contract documents.
Response posted 01/11/2021
Inquiry #48: There's an 8" ACP Waterline that is in conflict with RW105 that states to be relocated by others, but the specifications don't provide a window for this work. Please review and clarify when this work is to be done and where the waterline is being relocated.
Inquiry submitted 01/08/2021
Response #1:Please bid per current contract documents.
Response posted 01/11/2021
Inquiry #49: Notice to Bidders requires that the project be completed including plant establishment within 480 Days.
The majority of the planting on this project occurs in Stage 2, which would require all construction through stage 2 to be completed prior to begining plant establishment.
With a plant establishment period of 250 working days, the schedule would require that all construction through Stage 2 be completed within 230 Days. Due to several issues with pile procurement, bridge cure, and various Traffic Switches required by the Staging, It does not appear that the State has provided enough time in the Contract to complete the work.
Please verify that it is the State's intent to include Plant Establishment within the 480 working days.
If it is not the intent, please provide adequate time to complete the project.
Inquiry submitted 01/08/2021
Response #1:Please bid per current contract documents.
Response posted 01/11/2021
Inquiry #50: Please provide Drainage Profiles for Drainage Systems 3 & 4.
Several Bid Items including Structural Concrete, Drainage Inlet and Cap Inlet require information from these profiles to provide acurate bid pricing.
Inquiry submitted 01/08/2021
Response #1:Please bid per current contract documents.
Response posted 01/11/2021
Inquiry #51: Addendum 2 was issued, but information and updated file for Bid Express has not been updated/added.
Inquiry submitted 01/08/2021
Response #1:Issue has been resolved and posted.
Response posted 01/11/2021
Inquiry #52: Inquiry #14 requests additional information as it relates to existing CIDH Piles.
Not enough information exists in order to accurately price the removal of the existing piles. We request that the State provide the following information:
1) The required minimum spacing between Proposed Piles and Existing Piles (what will be required to be removed), or specify which piles are to be removed.
2) The type and strength of the existing piles. The Foundation report states that the as-built bridge set (1958) contains CIDH piles, and further goes on to state that the Bridge Inspection Report notes driven piles. There is a conflict within that document and no further information exists within the Contract Documents.
At this time with the existing information contained in the Contract Documents, the work cannot be accurately priced. Please consider providing provide additional information so that the work can be priced or changing the method of payment to Change Order Work if proper information cannot be provided prior to bid.
Inquiry submitted 01/08/2021
Response #1:please bid per current contract bid documents.
Response posted 01/11/2021
Inquiry #53: Plan Sheet 22 (Plan C-1) indicates "Beg Curb (Type H) 60.6 Lt 149+19.32 'ALN 16.'" Type H Curb is not included in the Minor Concrete Column of the table on plan sheet 95 (Plan Q-1) and appears to have been omitted from the quantity for bid item 124. Will Caltrans increase the quantity of bid item 124 to account for this omission?
Inquiry submitted 01/08/2021
Response #1:Please bid per current contract documents.
Response posted 01/11/2021
Response #2:Please bid per current contract documents
Response posted 01/11/2021
Inquiry #54: Reference the Typical Cross Section Sheet (X-1) from Addendum 2. The cross section shows Cold Plane / RHMA-G Overlay on the new Structural Section 1. Please review and confirm.
Inquiry submitted 01/11/2021
Response #1:Refer to Sheet No. 7 and 36 for differentiation between structural sections.
Response posted 01/11/2021
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.