Questions and Answers to Project Documents — Business Opportunities
PROJECT:  Runway 8-26 Complex Pavement Rehabilitation
NUMBER:  201732479

Current as of:  3/23/2017
Question Number  1:   Can you please provide a complete bid submittal checklist?
    Answer:   There is no bid submittal checklist. Please comply with the requirements set forth in the Project Manual.
Question Number  2:   I see that there will not be a site visit conducted following the pre-bid on 3/2 per page 2 of the Project Manual Part 1. Will it be possible to set up an individual site visit so my firm can determine the condition of the spalls, joints, and other pavement repair? Who do I contact to set up a site visit? It is vital for us to see the condition of those pavement repair items so we can accurately bid them.
    Answer:   It is possible to arrange a limited site visit. Please contact Keith Johnson, T: 303-342-2736, or
Question Number  3:   Do the joint sealing bid items in Schedule VII cover all joint sealing on the entire project or is there incidental joint sealing for the new concrete?
    Answer:   New joint sealant is incidental to Pay Items P-501-8.1 and P-501-8.2. Replacement joint sealant attached to existing or remaining pavement shall be paid by either Pay Items P-501-8.4 or P-501-8.5.
Question Number  4:   My inquiry is regarding the bid item L-125-5.1. Please let me know if I am correct in understanding that the term “procure” would mean the same as new. Looking at the electrical legend on sheet EL002, I don’t see a new L850A fixture. Am I missing something?
    Answer:   The term "procure" refers to the contractor supplying a new fixture. The new L-850A(L) fixtures are called out in Note 2 on Sheets EL105 and EL113.
Question Number  5:   IB-30 states that the City may provide a ROCIP, the insurance requirements appear that this project will be under the ROCIP program; please clarify if this will be a ROCIP project or not?
    Answer:   This project is a ROCIP designated project.
Question Number  6:   To maintain unescorted airfield access for badge drivers, is it correct that each contractor/subcontractor/trucking company must provide the $9 million excess umbrella liability insurance as it is not covered under the ROCIP insurance?
    Answer:   Yes, anyone who is driving unescorted on the airfield must provide a total of $10 million (primary and excess) in order to get their vehicles permitted. Auto is not covered under the ROCIP.
Question Number  7:   Do all truck drivers utilizing the project haul routes need to be badged?
    Answer:   REVISED RESPONSE: Yes, per General Note 14 on Sheet GI109.
Question Number  8:   Will the low profile barriers/lights and the construction delineators be provided by DEN or are they to be provided by the contractor?
    Answer:   The barriers and delineators are to be Contractor supplied and will be paid under the “Traffic Control” bid item.
Question Number  9:   Detail 4 on plan sheet CP503 is called welded wire fabric but indicates #4 bar on 12” centers, can welded deformed steel fabric be used in lieu of the #4 bar for the reinforced panels, if so please provide the gauge size required?
    Answer:   Yes, D6xD6 at 6” spacing can be used.
Question Number  10:   It does not appear details have been provided for “spall repair at light cans”, will any be performed on this project? If any will be performed can a separate bid item be provided as the scope of these spall repairs is significantly different than that of regular spall repairs?
    Answer:   Details 1 and 2 on CP801 show light can spall repair details. Necessary additional details and a bid item will be provided in Addendum 2.
Question Number  11:   Please verify that all vertical edges of the rotomilled surface must be sawcut per section P-150-1.10?
    Answer:   Correct. These limits are also shown on the Demolition Plans.
Question Number  12:   There is no pay item for survey as required per section 01 32 23, including DEN required BIM and GIS. Please confirm that this cost is to be allocated throughout the other pay items?
    Answer:   All survey is incidental to the project.
Question Number  13:   Is the intent of the multiple schedule to be that DEN will award individual schedules based on DEN’s budget. In other words, if the overall bid exceeds the budget, some of the schedules may not be awarded? Can the airport identify it’s priority of schedules?
    Answer:   Yes. Yes. The individual schedules have the same priority.
Question Number  14:   Can QC Technicians, per spec section 01 45 25, that are performing material testing also serve as the QC inspectors; or will QC inspectors be required, per 01 45 10, in addition to the testing technicians?
    Answer:   A QC technician with the required qualifications can perform inspection and testing duties, but not at the same time.
Question Number  15:   Section P-501-5.2 contains an acceptance requirement of vertical deviation from plan shall not exceed +/-0.04 feet. Final pavement elevations have not been provided, are these to be provided?
    Answer:   Yes, per Sheet CP101, elevations will be provided with the Issued for Construction set. Survey is still being performed on the existing panels.
Question Number  16:   Plan sheet CP501 states that any portion of the basket in contact with the subgrade is required to be plastic or epoxy coated. Plastic coating has not been allowed in the past, will it be allowed now? The specs seem unclear whether the bottom of the reinforcing steel supports chairs (zig-zags) are also required to be epoxy coated, please clarify?
    Answer:   Plastic will not be allowed. This change will be incorporated into Addendum 2. According to P-501, “Dowel assemblies, tie bars and other miscellaneous steel embedded in the concrete should be epoxy coated according to ASTM A1078.”
Question Number  17:   Specification section T-905 indicates that all topsoil is required to be tested, amended and meet the requirements indicated. Will the existing on-site topsoil that is stripped and replaced be required to be tested & amended and meet these criteria? Should the contractor bid imported topsoil in order to meet these requirements?
    Answer:   Yes it will. The existing topsoil can be amended to meet the requirements of T-905 or topsoil meeting the requirements of the specification can be imported.
Question Number  18:   SC-7 indicates that the contractor shall complete the Work within 133 calendar days from NTP; In this section there are also completion dates set for Administrative of July 9th, and Construction of October 31st. The phasing schedule on sheet GC601 and 80-08 indicates a construction duration of 114 calendar days. Please clearly define what the durations are for the administrative period and construction period?
    Answer:   We anticipate the Notice To Proceed will be dated June 19, 2017, and the “administrative” period will be 21 days ending on July 9. The construction period is anticipated to be from July 10, 2017 through and including October 31, 2017 for 114 days.
Question Number  19:   Will the contractor be required to remove concrete by sawing into pieces, lifting out, and placing into trucks per section P-150? Will breaking be allowed?
    Answer:   P-150-1.9 states lifting out unless another method can be successfully demonstrated to the DEN Project Manager.
Question Number  20:   The documents indicate that if the north recycling yard is not available, the contractor will be required to crush the removals and stockpile in their staging area, it is unclear if the contractor is to dispose of or crush. Can DEN clarify if the north recycling yard is available for this project and what the contractor is to do with the removed concrete and asphalt materials?
    Answer:   The Contractor will use the North Recycle Yard for crushing the removed concrete and asphalt materials. If additional space is needed for crushing, the project’s staging area can be used. The crushed material will become property of DEN. The plans and specification Section P-159 have been updated in Addendum 2.
Question Number  21:   If the contractor is to crush the removed material, can the contractor utilize the crushed material on this project and/or other projects at no cost to the contractor? Does this material become the property of the contractor or DEN?
    Answer:   The crushed material shall become property of DEN, and it will be available to DEN who has the first priority and to the contractor for use on other projects.
Question Number  22:   Please confirm that removed CTB and CTS material is not to be disposed of on DIA property and must be hauled to DADS per section 01 74 19?
    Answer:   Confirmed.
Question Number  23:   Panel blockouts as indicated on sheet CP101 and CP505 are not shown on the paving plans, can these be indicated? Upon change of panels to be replaced, how is the contractor to figure the cost of blockouts; previous projects have included a blockout pay item, can one be included?
    Answer:   Blockout callouts will be added to the Paving Plans. A separate bid item will be included in Addendum 2.
Question Number  24:   Sections P-301, P-304 and P-610 are specifying a Type V cement. DEN has always allowed a Type I/II LA as an equivalent provided it met a list of requirements. Additionally the type I/II LA is the cement type specified for P-501. Can a Type I/II LA be used in lieu of the Type V for section P301, P-304 and P-610?
    Answer:   Yes, a Type I/II LA cement equivalent to Type V is acceptable and will be updated with Addendum 2.
Question Number  25:   Previous projects have required the contractor to place cones around any open holes on the complex, will this be required on this project? If so can a detail be provided for how often?
    Answer:   Traffic cones shall be placed around any open holes on the project. For openings in the PCCP, cones shall be placed at the corners and mid points of each removed panel. For all other openings, cones shall be spaced no more than 10’ apart.
Question Number  26:   Specification GP 80-01 state Contractor shall perform 25% of the work, Special Condition SC-5 states no more than 50% of the work may be subcontracted, which is correct?
    Answer:   50% is correct. GP 80 correction will be shown in Addendum 2.
Question Number  27:   Specification Section P-304-5.6 states that each lift may be no greater than 6” thick. Previous DEN projects have specified a max of 6” lift except where the total depth is greater than 6”, then no layer shall be in excess of 8”. Is it the airports intent to have the 8” CTB layer constructed in 2 lifts or can it be constructed in a single 8” lift?
    Answer:   Two (2) lifts are required as indicated in the specification.
Question Number  28:   Sheet GI-107 states the contractor will be given additional space should crushing operations be needed. Where is this additional space located?
    Answer:   Crushing operations are to take place in the North Recycle Yard. If additional space is necessary for crushing, the staging area can be used. Prior to the de-mobilization of the staging area, remaining stockpiles of crushed material will be hauled to a location on Denver International Airport property that has been designated by the DEN Project Manager.
Question Number  29:   GI-109 Note 7 states all haul route damage is to be fixed at the expense of the contractor. Are all paved areas designed to handle legal tractor-trailer loads? If not, will the contractor be required to fix these areas at their own expense if they are damaged by legal tractor trailer loads.
    Answer:   The construction access roads shall be maintained throughout the project and restored to their preconstruction condition, or better, at the completion of the project. The maintenance and restoration work will be incidental to the contract.
Question Number  30:   There does not appear to be any items for jumpers, covering of signs, covering of edge lights, shorting plugs, or blank covers for fixtures within 1 panel of the work areas as is typical on DEN jobs. Can separate bid items be given for these items of work?
    Answer:   This work shall be considered incidental to the project.
Question Number  31:   The legend on plan sheet CE-101 shows sediment control logs, however going through the erosion plans there does not appear to be any used. Will sediment control logs be required anywhere on the project & if so can the locations be given?
    Answer:   Sediment control log locations are currently shown on Sheet CS146.
Question Number  32:   Note 7 on plan sheet CE-101 states additional VTC may be needed if required by erosion control inspector. Will the contractor be compensated for any extra VTC to be installed which is not shown on the erosion control plans?
    Answer:   No. Reference: General Requirements Section 015719, Paragraphs 4.1 and 5.1.A.
Question Number  33:   The erosion control plans show erosion control blanket being installed but there is no bid item for erosion control blanket. Can a bid item be provided for erosion control blanket?
    Answer:   A bid item will be included in Addendum 2.
Question Number  34:   The typical sections on plan page C-301 do not show any details for the existing subgrade under the CTS on RW 8-26 at the "bump." Will the contractor be required to recondition the existing subgrade to a depth of 5’ below pavement elevation as stated in section P-152-1.4; Or will the existing need to be prepared per section P-152-2.5 to a depth of 6”? Does the existing soil meet the lower select specifications?
    Answer:   The existing soil will be prepared per P-152-2.5 prior to importing the Upper Select Embankment to be cement treated. The subgrade preparation work shall be considered incidental to the project.
Question Number  35:   Note 1 on plan sheet CP-701 states all work is to be performed under schedule XV. As there is no schedule XV for bid items please confirm if these work should be bid under the items provided in bid schedule VII?
    Answer:   Correct, this will be corrected in Addendum 2.
Question Number  36:   Note 1 on plan sheet CT501 states all pavement marking removals will be per the demo plans. There does not appear to be any pavement marking removals shown on the demo plans. Can locations of the pavement marking demo be provided?
    Answer:   The locations will be included with Addendum 2.
Question Number  37:   The erosion control plan does not have the East end of the TW 8-26 complex on it. Can a plan sheet showing this area be provided?
    Answer:   There is no erosion control work at the east end.
Question Number  38:   On past contracts DEN has provided and submitted SWMP documents and covered the cost for all erosion permitting done through the City and County of Denver. Will DEN procced this way on this project or, will it be the responsibility of the contractor to draft up the SWMP documents, submit them and obtain the permit?
    Answer:   DEN will coordinate the submittal of the SWMP to the City and County of Denver, and DEN will cover the cost of the erosion permit.
Question Number  39:   The prevailing wages tables do not seem to be in the contract documents. Can the full prevailing wage table be provided?
    Answer:   Yes, in Addendum 1.
Question Number  40:   On EL002 there isn’t a symbol for the L850a, 852d and 852k that are to be procured, the description says reinstall. Please provide a light schedule with colors for the new fixtures.
    Answer:   There are two L-850A fixtures to be procured in Schedule I which are noted on the layout sheets EL105 and EL113. Both are 1-circuit with red/clear lenses. Procurement and installation of L-852D and L-852K will occur only as part of Schedule VIII work. Reference to installation of new taxiway centerline lights in Schedule I will be deleted.
Question Number  41:   Are the 852D and 852K fixtures being procured to be 1-Circuit or 2-Circuit?
    Answer:   Procure the fixtures as 1-circuit.
Question Number  42:   Schedule 1 bid items 5.21 and 5.22, what fixture types are being installed? Need to know if they are 1 circuit or 2 circuit. Bid form only says taxiway centerline, need to know fixture type and uni or bi directional to determine transformer size.
    Answer:   Bid item 5.22 will be deleted from Schedule I as part of an upcoming addendum. No new fixtures are required for Schedule I work.
Question Number  43:   How deep are the new 868b cans supposed to be? EL503 detail 5 states 22”, details 1 and 4 show 24”. Drawing EL506 shows a 26” deep can.
    Answer:   All cans except for one shall be 24” deep. Detail 5 on EL503 will be changed to 24” depth. The detail on EL506 will be noted as reference for the installation of TW CL light at TW R2 and RW edge.
Question Number  44:   On EL514 detail 3 calls for the L867E to be epoxy coated; the spec says all cans are galvanized; please clarify.
    Answer:   The required base cans shall be galvanized. Reference to epoxy will be changed in an upcoming addendum.
Question Number  45:   EL514 detail 1; is the ACE unit shown existing?
    Answer:   Yes.
Question Number  46:   Per EL515 it appears fixtures, cans & snow plow rings are FAA furnished. Are bid items L-125-5.28 & 5.29 in schedule 3 for installation only?
    Answer:   Correct.
Question Number  47:   In schedule 1, is bid item L-125-5.22 a duplicate of 5.21?
    Answer:   Yes. 5.22 will be deleted in an upcoming addendum.
Question Number  48:   Are any spare fixtures or spare parts required with the bid?
    Answer:   No.
Question Number  49:   There are only 8 L850d in the procure bid item, there are 16 in the install bid item. Are 8 of them existing or owner furnished?
    Answer:   Correct, the quantity will be increased to 16 in an upcoming addendum.
Question Number  50:   Please provide a detail for the L853 Roadside Delineators.
    Answer:   Please refer to Detail 4/EARD701.
Question Number  51:   Schedule 1 bid item L-125-5.23 – Is the existing isolation transformer going to be reinstalled? If a new one is required please provide the size.
    Answer:   The transformers will be reinstalled.
Question Number  52:   It appears that the work on the DS taxiway is to include full new sections of taxiway, including 5ft depth of lower select, Upper select, CTS, CTB, underdrain, RCP, full asphalt shoulder, and full new electrical; this is in addition to some portion of removal and replacement of existing PCCP. Can it be confirmed that in the area west of TW-M and down to TW-ED this full scope of work is required to be completed in the Phase 1a - 90day duration?
    Answer:   Correct. The areas within the hatches shown on GC102 are required to be completed within the contract time associated with each subphase.
Question Number  53:   Without detail or plan sheets for exact scope of work at TW-DS it is unclear how much of this work will be required to be performed at night, please clarify what work is anticipated to be required for the Schedule VIII scope at night?
    Answer:   DEN will be providing jet blast deflectors to be placed parallel to TW ED adjacent to this work area. The blast deflectors should reduce the amount of night work for TW DS provided the contractor is comfortable working up against them. Some work, such as grading to the edge of TW DS will be required to be performed at night. See revised GC102 included in Addendum 2.
Question Number  54:   3. It is difficult for contractor’s to precisely bid the Taxiway DS pay items without plan sheets for this work. This approach allows contractors interpretations of the work, which may vary significantly. Additionally this approach may put the airport at risk for additional cost if the final work plans differ from each contractor’s interpretation at the time of the bid. In order to keep all bidders equal, can one of the following options be provided?
    Answer:   The majority of the pay items being performed on TW DS is also being performed under the other bidding schedules. Specifications and quantities are provided for Schedule VIII for bidding purposes. Per GC101, a change order will be issued once detail design of this work is complete to rectify any quantity discrepancies and items not included in the bid.
Question Number  55:   Can a Force Account item be provided as opposed to bid items so that bidders varying interpretations of the work and associated cost are avoided at bid time?
    Answer:   No.
Question Number  56:   Can the base bid, and the basis of determining lowest bidder, be based on Schedules I-VII so that bidders varying interpretations of schedule VIII are not included in the basis of low bidder?
    Answer:   No.
Question Number  57:   There are limitations on available ITA testing firms in the local market to cover the demand of this project. DEN has a current QA Testing contract, as well as an upcoming QA testing contract; can DEN indicate which of these contracts will be performing the QA testing on this project so that the bidders may solicit the other firm?
    Answer:   Currently, Kumar and Associates performs DEN’s QA testing. DEN will transition to Ground Engineering for QA testing in August and September, 2017.
Question Number  58:   Where is the Waste Embankment delineated? Is this embankment that is remaining from the lower borrow stockpile to be installed OR is it from the first stock pile to be relocated to the second? This bid item follows spec p-152-5.4 which there is no spec in the spec book, it stops at 152-4.4 then jumps to 153.
    Answer:   Waste embankment is excess earthwork material removed from the project area. The majority of the waste embankment from Schedule I is from excess material generated from the runway and taxiway safety area grading. The majority of the waste embankment in Schedule VIII is for construction of the new Taxiway DS pavement section, assuming the in situ material does not meet the lower select embankment requirements. All references should be to 152-4.4, and are corrected in Addendum 2.
Question Number  59:   Note 5 on plan sheet CP-701 states the saw & seal silicon rehab listed in pay schedule VII will be field located by the DEN. Is the intent to use the re-seal quantity in large areas through runway 8-26 complex or to “spot seal” on runway 8-26 and the various taxiways? Productions can vary significantly pending how big or small these areas are; can DEN provide the expected average re-seal quantity expected per re-seal location?
    Answer:   This quantity is to be used as both high production areas along the runway and spot sealing in areas where necessary across the complex. This will be dependent on the state of joint seal at the time of construction. The DEN Project Manager will differentiate the need between high and low production.