Halona_Street_Bridge_Questions_(4).pdf

DTFH6816B00029

HI STP H1(1) Halona Street Bridge 11/03/2016

QUESTION #1:

See Drawing RG3077-F "Suggested Sequence of Construction" & Specification Section 551 "Driven Piles", Subsection 551.05(a) "Pile Hammers" Paragraph (5) "Nonimpact Hammers" Item 5 of the construction sequence shows that a temporary cofferdam needs to be installed within the existing canal to divert the stream flow. Depending on the contractor's design and means and methods, the contractor may require the use of a vibratory hammer in order to install and extract the temporary cofferdam. Specification Section 551, Subsection 551.05(a), Paragraph (5) makes mention that use of nonimpact hammers such as a vibratory hammer is an acceptable method for pile installation. Please confirm if the contractor would be allowed to use vibratory equipment for the project.

RESPONSE:

The Contractor can use Vibratory Hammer for Pile installation in accordance with FP-14 Section

551.05 (a)(5).

QUESTION #2:

Please confirm that there is no static load test required to be performed for the pre-cast pile driving work for this project and that the contractor is only to perform four (4) each dynamic load tests as called out in the project plans and special contract requirements.

RESPONSE:

See SCR Section 551.13 Pile Load Test for Pile testing requirements.

QUESTION #3:

Reference the provided Geotechnical Report prepared by Hirata and Associates dated January 26, 2016. See page 9, Section 4.1.6.

The geotechnical report provides information that the recommended pile driving hammer for driving 24" octagonal piles should provide an energy rating between 26,000 ft-lbs per blow to 41,000 ft-lbs per blow. No minimum energy rating for the hammer to be used for pile driving was provided in the specifications or special contract requirements, please confirm if the contractor should base their pile driving operations on the hammer recommendation provided in the geotechnical report.

RESPONSE:

See FP-14 Section 551.05 (b)(2). The Project geotechnical Report is part of the Contract Documents and should always be denoted. The energy rating range specified in the project geotechnical report can be used as guidelines to the contractor when selecting a hammer.

QUESTION #4:

Reference special project requirements, section 108 "prosecution and progress", page E-19 Please confirm that contractor is limited to work days and times of Monday - Friday 8:30 AM to 3:30 PM and that night work is prohibited for this project RESPONSE: See Subsection 108.01(e) for limitations regarding work on Kokea Street, Kohou Street, and detour roads only.

See Subsection 108.01 (b) for project-wide limitations on night work.

QUESTION #5:

Reference special project requirements, section 551 "driven piles", page E-49, section 551.05 "pile driving equipment" This section states that swinging leads are not permitted for the project. In regards to the pile driving operations for the pre-cast piles at Piers 1 and 2, due to the difficulty of accessing and providing a level pad at the bottom of the existing stream so that a pile driving lead can be fixated and can be kept stable, it is requested that a hanging lead be allowed for this project.

RESPONSE:

See Amendment 002. Per FP-14 Section 551.05 (c) (3) “Swinging Leads” may be utilized only if they are adequately embedded in the ground or the pile is constrained in a structural frame to maintain proper alignment per FP-14 Section 152 Table 152-1.

QUESTION #6:

Reference Bid Item 55101-0300 Please confirm if the cost to furnish the 24" octagonal production and test piles are intended to be covered by this bid item. If so, it is requested that the cost to furnish the 24" octagonal piles be separated as its own bid item and that Bid Item 55101-0300 be intended to only cover the cost to drive/install the precast piles. Separating the furnish and installation of the pre-cast piles into separate bid items allows the contractor be fully compensated for furnishing a pile of a certain length in the event the installation length decreases due to the pile hitting refusal criteria above the intended tip elevation. Likewise, this separate bid item for furnish only of the piles will allow the contractor to be compensated if the length of the 24" octagonal piles needs to be increased after analysis of the dynamic load testing.

RESPONSE:

See SCR Subsection 551.07, paragraph 1. “The test piles will be used as production piles to support the structure”.

See FP-14 Subsection 551.18. Measure the length of the pile from cutoff elevation to the tip. The dynamic test are paid per each test and do not include the cost of the precast piles.

It’s the contractors responsibility to identify unit prices to be adequately compensated for the contract work requirements. See FAR 52.211-18 for variation in estimated quantity.

QUESTION #7:

Reference Bid Item 55101-0300 The current bid item appears that it is intended to cover costs for both the 4 each test piles and the remaining production piles. It is requested that the cost to install the indicator piles and the production piles be separate bid items.

RESPONSE:

See SCR Subsection 551.07, paragraph 1. “The test piles will be used as production piles to support the structure”.

It’s the contractors responsibility to identify unit prices to be adequately compensated for the contract work requirements. See FAR 52.211-18 for variation in estimated quantity.

QUESTION #8:

Please confirm that the pile length to be furnished for the four (4) each test piles on Sheet RG3077-D should be at minimum 10-ft longer than the pile length given on the "pile length data" table on Sheet RG3077-H

RESPONSE:

Confirmed.

QUESTION #9:

Reference Bid Item 55101-0300 and Sheet RG3077-H "Prestressed Concrete Pile Details" There is a provided bid quantity of 1900 LF. Will the measurement for payment be from pile cutoff elevation to installed pile tip elevation? Will measurement for payment be from given top of pile elevation to installed tip elevation as shown on drawing "RG3077-H"? Please clarify the how the length will be measured for payment to contractor.

RESPONSE:

See FP-14 Section 551.18.

QUESTION #10:

See Drawing RG3077-F "Suggested Sequence of Construction"

A. Is the contractor required to follow the work sequence as shown on the plan sheet or does the contractor have the ability to modify the suggested construction sequence as necessary?

RESPONSE: The details provided in sheet RG3077-F and RG3077-G provide a “suggested sequence of construction”. It is the contractors’ responsibility to determine the means and methods necessary to complete the work in accordance with the contract requirements.

B. Item 9 of the construction sequence shows that the pre-cast piles are intended to be installed after the temporary cofferdam is removed and flow from the existing stream is restored. Will the contractor be allowed to install pre-cast piles before the temporary cofferdam is removed so that pile driving operations do not need to occur within the water?

RESPONSE: See response to question 10 (A).

C. Items 9 and 10 appears to show that the contractor needs to install the piles at the new bridge pier locations first and then at the abutments. It is requested that the government allow the contractor to install the piles at a similar side of the new bridge (i.e. Pier 1 and Abutment 1 together) to minimize the amount of movement for equipment required to install the pre-cast piles.

RESPONSE: See response to question 10 (A).

QUESTION #11:

Reference Sheet "RG3077-D" Foundation Plan Are all 4 test piles required to be installed and tested prior to the installation of the remaining production piles? Or, will the contractor be allowed to install one each test pile at a particular structure (i.e. Pier 1), perform dynamic testing on the one test pile only, and then install the remainder of the production piles at that one particular structure before moving on and repeating the same process at the next structure?

RESPONSE:

It is the contractor’s responsibility to determine the means and methods necessary to complete the work in accordance with the contract requirements. See subsection 551.07 Test Piles. The test pile located at a particular structural element must be tested prior to beginning the production pile installations.

QUESTION #12:

Is the power line that runs parallel to the existing stream on the east side an active line? If so, what is the voltage of the power line and what is the height clearance from the line to the existing ground? Can the contractor request temporary shutoffs of adjacent power lines to the project site if the power lines interfere with contractor operations.

RESPONSE:

See section 107.02 pertaining to utility impacts within the project construction limits. Operations outside the construction limits are the responsibility of the contractor.

QUESTION #13:

Reference Bid Item 55115-1000 Please define how the payment length for pre-boring for the pre-cast concrete piles will be measured.

RESPONSE:

See Amendment 002. When measuring pre-boring by the linear foot, measure the length from the ground elevation of hole to the tip of the pre-boring hole.

QUESTION #14:

Reference Sheet S3, Note 1: What are the compaction requirements, if any, of the structural backfill material at existing piers?

RESPONSE:

See FP Subsection 204.11

QUESTION #15:

Reference Sheet S7, Note 16: Due to the difficulty of installing cofferdams below the freeway, will Contractor be allowed to only remove columns 3' below mud line for all existing piers?

Remaining footings would be outside the limits of the new construction.

RESPONSE:

See plan sheet S7 note 16 and detail for steps 14, 15, and 16 for contract requirements.

QUESTION #16:

What is the contract small business goal?

RESPONSE: Please refer to the solicitation page A-iii (Subcontracting Section) and page B-14 for Minority Participation and Female Participation Goals.

QUESTION #17:

Please clarify Bid Items 62101-0000 Monument and 63301-0000 Monument.

RESPONSE: See plan sheet T17.

QUESTION #18:

Please provide AS-BUILT Drawings of existing bridge and freeway culvert.

RESPONSE: As-built drawings are provided for the Halona Street Bridge. Please contact the Hawaii Department of Transportation for as-built drawings of the H1 freeway.

QUESTION #19:

Please clarify if bid time is 1:00pm or 2:00pm.

RESPONSE: Please refer to the IFB, page A-1, Item 13 (A) for bid opening date and time.

QUESTION #20:

Road Typical Section - Plan Sheet A7 and A6-Plan Sheet A8 typical section from 9+87.39 to 10+08.40 and Plan Sheet A6 typical section 9+71.84 to 10+48.23 overlaps one another. Please clarify when each typical section is to be used versus the other typical section?

RESPONSE: Please use sheet A6 for the overlapped stations.

QUESTION #21:

Hazardous Material - SCR 203.04(b) - SCR 203.04(b) states Perform a survey to determine whether asbestos-containing material, lead based paint or both are present. Please clarify that if these materials are present then the cost for abatement and disposal will be handled as a change to the contract. Otherwise please provide specification and information needed to quantify & price the abatement and disposal work.

RESPONSE: Please refer to FAR 52.243-4 changes.

QUESTION #22:

Hazardous Material - SCR 203.05(d) - SCR 203.05(d) please clarify that Federal Highways or State of Hawaii Department of Transportation will be listed and sign waste manifest as the owner/generator for hazardous materials if present (i.e., asbestos containing material, lead containing material and petroleum containing material) from removal, demolition, and rehabilitation activities.

RESPONSE: For the purposes of bidding on this contract, it is assumed hazardous waste material will not be generated. Please refer to FAR 52.243-4 changes.

QUESTION #23:

Signing and Striping - SCR 633.03 / Plan Sheet D6 - SCR 633.03 states submit permanent signing and striping plans that are signed and sealed by a professional engineer. Plan Sheet D6 shows the permanent signage and striping plan. Please clarify what other permanent signing and striping plan per SCR 633.03 is to be signed & sealed by a professional engineer?

RESPONSE: See plan D6 for the projects permanent signing and striping requirements.

QUESTION #24:

Proposal - Bid Schedule page A – 11 - Bid Schedule page A - 11 bottom left corner references the wrong project No and Name.

RESPONSE: See Amendment 001.

QUESTION #25:

Proposal - Bid Schedule Page A – 1 - We request a 2 week extension to the November 9, 2016 bid date. The scope & complexity of this project requires extra time to evaluate the Kapalama Canal cofferdam, dewater, support of excavation, falsework, pile driving, and precast pile & girder requirements, and coordinate scope with the specialty & small business contractors & suppliers needed for this project.

RESPONSE: There is currently no intention for the government to re-establish the bid opening date beyond the extension provided under Amendment 001.

QUESTION #26:

Reference Sheet D4 - D5 & Sheet S8, Drawing No, "RG3077-H"

The current traffic control plan and staging area currently allows for one travel lane in the north bound direction to remain open during construction on Kokea Street and one travel lane in the south bound direction to remain open during construction on Kohou Street. Based on the current design for the 24" octagonal pre-cast, pre-stressed concrete piles, the longest test pile that would need to be driven would weigh approximately 25 tons. Based on this weight, the contractor would be required to utilize equipment such as a large crawler crane that would not fit within the confines of the traffic control plan and would not allow for one traffic lane to remain open, especially on the Kokea Street (East) side of the bridge. In order to complete the work as called out in the design, it is requested that Kokea Street (and possibly Kohou Street) be allowed a 24-hours a day shut down in all directions of traffic within at least a 100' radius of the limits of the project area so that the contractor will have an adequate amount of space to stage and utilize equipment required to complete the work for the project. With a 24-hour shut down of Kokea Street near the project area as requested, it would be then be requested that Auld Lane or Palama Street be allowed to be utilized as alternative streets to re-direct vehicle traffic towards School Street instead of Kokea Street as shown on the drawings.

RESPONSE: See Subsection 156.04 Accommodating Traffic During Work.

QUESTION #27:

Reference Sheet D4 - D5 & Sheet S8, Drawing No, "RG3077-H" Based on the current design for the 24" octagonal pre-cast, pre-stressed concrete piles, the longest test pile that would need to be driven would weigh approximately 25 tons. Based on this weight and based on the given area the contractor is allowed to use from the traffic control plan, the contractor would be required to utilize equipment such as a large crawler crane that would not fit within the confines of the traffic control plan and would not allow for one traffic lane to remain open. In order to minimize the weight that needs to be picked and possibly allow the contractor to use smaller equipment that would fit within the confines of the existing traffic control plan, would the contractor have the option to either mechanically splice or utilize a splice can for the installation of the concrete piles? If the piles are allowed to be spliced, is there a minimum length below the existing ground that the splice point for the pile would need to be?

RESPONSE:

See FP-14 Subsection 551.11 (c) for Pile splices guidelines.

QUESTION #28:

Plan Sheet S6, S7 - Plan sheet S6 and S7 - typical sections shows cofferdam between H-1 and Halona Street bridge. It would be very much appreciated if we could get H-1 Bridge and Halona

Bridge as-built plans. We require the as-built plans to determine how to access the area under H-1 and Halona bridges to install cofferdam. Also we need the as-built drawings to quantify the Halona bridge demo quantities.

RESPONSE: As-builts for the Halona Street are attached. Please contact the Hawaii Department of Transportation for the H1 freeway as-builts.

QUESTION #29:

EA Appendix A - Please confirm that Federal Highways Division will obtain the Army Corps of Engineers permit 404 and State DOH permit 401 WQC.

RESPONSE: The government has obtained the 404 permit and 401 WQC.

QUESTION #30:

Sheet T14 of the project plans details CRT wood posts for the guardrail system to be installed.

Would it be acceptable to install the guardrail using the more common steel posts of the same height instead?

RESPONSE: The contract includes pay item 61701-1200 Guardrail System G4, Type 2, Class A, Steel Posts. See subsection 617.01 and plan sheet T11 for the project requirements.

QUESTION #31:

The proposal states that item 61701-1200 is "GUARDRAIL SYSTEM G4, TYPE 2, CLASS A STEEL POSTS." The guardrail details on the plans show CRT wood posts. Please confirm that the guardrail system will have steel posts.

RESPONSE: See plan sheet T11.

QUESTION #32:

Will this project require advisory signs and construction work zone signs as required in Hawaii state standard specifications 645.03(G) and 645.03(B) respectively? See below:

RESPONSE: See the project plans, section 635 of the “The Standard Specifications for Construction of Roads and Bridges on Federal Projects” FP-14, and the Special Contract requirements, for the project requirements.

QUESTION #33:

Sheet T8 - How deep is the existing 42" waterline below grade?

RESPONSE: See provided BWS as-builts for the 42” waterline.

QUESTION #34:

Plan Sheet S2 - Plan Sheet S2 General Note for Reinforcing steel states "All reinforcing steel shall conform to AASHTO M31 or M322 grade 60 deformed". AASHTO M31 references smooth or deformed carbon steel bars. AASHTO M322 references rail or axle steel rebar which is not commonly used or available in the market. Please clarify if this is a special type of rebar or standard grade 60 deformed rebar.

RESPONSE: The intent is for the contractor to furnish Grade 60, deformed steel rebar conforming to AASHTO M 31 or M 322. Note that per FP-14 Subsection 709.01(b) conformance with AASHTO M 322 is not required, but an option.

QUESTION #35:

Plan Sheet S7 - Plan Sheet S7 Suggested sequence of construction step 16 states "Install cofferdam, as above, and remove the remainder of the existing pier columns and footings as indicated". Exist H-1 bridge prevents access from above to install a sheetpile cofferdam to remove the entire length of pier column and footing. Please consider revising to "Install cofferdam and remove the remainder of the existing pier columns to a depth of 3 feet below the exist stream bottom".

RESPONSE: The details provided on sheet S7 provide a “suggested sequence of construction”. It is the contractors’ responsibility to determine the means and methods necessary to complete the work in accordance with the contract requirements. See Subsection 208.05 of the FP-14 and Special Contract Requirements for cofferdam requirements.

QUESTION #36:

Bid Schedule - Item 20304-1000 "Removal of Structures and Obstructions" please clarify which structures & obstructions, and the plan sheet that this is work is shown that is to be included in this item.

RESPONSE: See Plan Sheet B3 “Removal Summary” notes 1 and 2.

QUESTION #37:

Bid Schedule - Item 20301-1500 "Removal of Light Pole" please clarify which plan sheet show removal of light pole.

RESPONSE: See plan sheet C1. The location of the light pole to be removed is at Station 11+40 Rt.

QUESTION #38:

Bid Schedule - There are two bid items for monuments. Item 62101-0000 Monument 2 each is shown on plan sheet C1. Please clarify which plan sheet show item 63301-0000 Monument 5 each.

RESPONSE: Item 62101-0000 Monument is a street survey monument. See plan sheet T17. Item 63301-0000 is a sign system installation. See plan sheet B4.

QUESTION #39:

Will the design team accept C1293 for aggregate ASR qualification in place of C1260 for this project?

RESPONSE: See Subsection 703.01 (b)(4) of the FP-14. C1293 is acceptable.

QUESTION #40:

Will the design team (engineer and/or architect) waive the air entrainment requirement?

RESPONSE: See Amendment 002. Air entrained concrete is not required.

QUESTION #42:

Please clarify which bid item to include the temporary pedestrian access and utility bypass work.

RESPONSE: It’s the contractors responsibility to identify unit prices to be adequately compensated for the contract work requirements.

QUESTION #41:

Amendment #1 extended bid date 1 day. We would greatly appreciate it if CFL would extend the bid date at least another week for the following reasons

1. We have not yet received responses to the RFI's that have been submitted.

2. The scope of this project Includes Kapalama Canal cofferdam, dewater, support of excavation, falsework, pile driving, and precast pile & girder requirements.

3. Proposal requires small business contractors & suppliers participation for this project.

RESPONSE: There is currently no intention for the government to re-establish the bid opening date beyond the extension provided under Amendment 001.