Howards Bay QA 01July2020.pdf

Solicitation Issued Solicitation # W91XK20B0006 Questions Close 6/1/2020 Howards Bay SND & GLLA Dredging 6/18/2020 @ 10:00 AM - EST

Numb. Question Answer Initials of

Respondant Date/Time Answered

Can the existing conditions surface for each dredge area be provided in PDF or CAD format in order to obtain quantity take offs?

Existing conditions for ENV dredging design were developed from a combination of survey data from 2013, 2014, and 2016 that was combined into a single surface. Any points above -28 LWD were removed to simulate SND dredging down to required depth +1 ft allowable overdepth. Contours for this surface are provided in the file named "Howards Bay 2013, 2014, 2016 Contours". Existing conditions for SND dredging design were developed from 2018 survey data and the contours for this surface are provided in the file named "Howards Bay 2018 Contours". DMU boundaries and SND dredge limits are included in separate files that are named accordingly.

EAM 6/15/2020

Arcadis' 100% Design Document Report indicates the staging pads would be constructed with 6” of sand, 12-ounce non-woven geotextile, 40-mil HDPE liner, 12-ounce non-woven geotextile, 6” of crushed stone and 4” of asphalt. The specifications and contract drawings (CN504) only indicate 4” of asphalt. Please confirm how the environmental dredging staging and processing pad shall be constructed.

Construct in accordance with the specifications and drawings. Environmental staging area(s) shall have sufficiently low permeability to prevent construction water contact with underlying soil and groundwater.

EAM 6/25/2020

In the event of a conflict between 100% Design Document Report and the specifications, which document governs?

The specifications govern over the DDR. EAM 6/25/2020

Is dredged sediment allowed to be hydraulically offloaded into the Erie Pier CDF?

a. If so, is the contractor required to contain slurry, treat water, and discharge water from the Erie Pier CDF, to Howards Bay?

Dredged sediment must be conveyed into the placement area by off road dump truck or other Government approved method. (Section 35 20 23.43, paragraph 3.6.2 Erie Pier Disposal Area Transfer and Conveyance). Hydraulically offloading into Erie Pier CDF is not an approved method

EAM 6/10/2020

5 Please clarify whether multi-beam or single-beam hydrographic surveying will be utilized.

The Government has the option to use either single beam or multi-beam hydrographic surveying equipment.

EAM 6/10/2020

6 If single-beam hydrographic surveying is utilized, please specify the line spacing. If single-beam hydrographic surveying is utilized, the line spacing will be 50 ft. EAM 6/10/2020

Are progress payment and quality control surveys performed by the contractor required to match the selected method by USACE (multi vs single)? If so, please clarify which method will be utilized by USACE.

No, progress payment and quality control surveys are not required to match the selected method by USACE. The contractor can use either method for their Quality Control Checks. USACE anticipates using multi-beam equipment to perform the surveys, but has the option to use single-beam as well.

EAM 6/10/2020

Section 01 35 13.10 1.5.2 pg 9 indicates that typical hours of operation will be 8 hours per day 5 days per week. For bidding purposes, will extended shifts and weekend work be permitted?

Extended shifts and weekend work may be permitted in accordance with Section 01 35 13.10, paragraph 1.5.2 Extended Hours of Operations

EAM 6/10/2020

Based on Section 13.10 1.5.2 pg 9 indicates that typical hours of operation will be 8 hours per day 5 days per week. For bidding purposes, will extended shifts and weekend work be permitted?

Extended shifts and weekend work may be permitted in accordance with Section 01 35 13.10, paragraph 1.5.2 Extended Hours of Operations

EAM 6/10/2020

Section 35 20 23.43 1.13.2 pg 5 states that side slopes will only be paid beyond one vertical (1V) on two horizontal (2H). Should it be demonstrated via survey and dredging files that the natural angle of repose is flatter than 2:1, will the contractor be compensated for sediments removed?

Side slope for the SND portion will remain at 1V:2H regardless of the angle of repose.

EAM 6/23/2020

If hopper scows are utilized, rather than bottom dump scows, is the DQM system required?

Yes, DQM Scow Monitoring requirements apply to hopper scows. EAM 6/10/2020

Section 02 61 13 1.2.1 pg 2 Contractor shall allow for 14 calendar days between end of navigational dredging and start of environmental dredging within each dredge unit. Can you please detail the need for this requirement?

As indicated in Section 35 20 23.53 (Pargraphs 1.3 and 1.5.3), this time is needed to allow the Government to complete prior-to-dredging sounding survey work and issuance of updated dredge prisms. Actual time may be less but for planning purposes plan 14 calendar days.

EAM 6/25/2020

Are there tipping fees for the contractors use of Wisconsin Point Landfill, Erie Pier CDF, and or Vonco Landfill?

There are no tipping fees at Wisconsin Point Landfill or Erie Pier CDF. The Contractor is responsible for negotiating costs with Vonco.

EAM 6/23/2020

The dredge sequence in spec section 35 20 23.53 1.5.3 omits DMU OC-11. Please indicate the anticipated dredge sequence for DMU OC-11.

Revise specification Section 35 20 23.53, paragraph 1.5.3 h to read: "h. OC-11 and OC-12, followed by FC-9"

EAM 6/25/2020

Are the Baxter Avenue Embayment and Cummings Slip Staging Areas cleared of all equipment for use?

Equipment and material stockpiles will be removed from within the boundaries of the Baxter Ave. Embayment Staging Area and the Cummings Slip Staging Area shown on Sheet CN105 before 24 July 2020.

EAM 6/23/2020

Can conventional construction equipment access the east and west borrow areas without installing access roads?

"Conventional construction equipment" is too broad of a category to give a definitive answer. The Contractor will need to perform their own site investigation of the borrow pit areas prior to bid opening.

EAM 6/10/2020

Section 01 57 19 – 1.7.9.3.3 Perimeter Air Monitoring What is the rational for using a PID with an 11.7 lamp to determine lower explosive limit versus a combustible gas meter?

Use of an equivalent monitoring device for measuring lower explosive limit may be proposed for use. The equivalent device must:

- Have accuracy equivalent to a PID or sufficient for the monitoring application specified.

- Be capable of being safely operated under expected site conditions.

Language to allow for use of an equivalent monitoring device for lower explosive limit monitoring will be added to the specifications.

EAM 6/29/2020

Section 01 35 26 – 1.3 Submittals Radiography Operation Planning Work Sheet is required. We could not find a specification section that identified the requirements of this work task. Is this required?

In accordance with Section 01 33 00, paragraph 1.10 SCHEDULING, if a submittal is called for but does not pertain to the contract work, the Contractor is to include the submittal in the register and annotate it with "N/A" with a brief explanation. Approval by the Contracting Officer does not relieve the Contractor of supplying submittals required by the contract documents but which have been omitted from the register or marked "N/A."

Use of portable machine sources of ionizing radiation such as nuclear density gauges require submission of Radiography Operation Planning Worksheet.

EAM 6/29/2020

Can you provide the xyz dredge design and top of sediment files. Also cad files for quantity take offs.

It is unclear what is meant by xyz dredge design. Existing conditions for ENV dredging design were developed from a combination of survey data from 2013, 2014, and 2016 that was combined into a single surface. Any points above -28 LWD were removed to simulate SND dredging down to required depth +1 ft allowable overdepth.

Contours for this surface are provided in the file named "Howards Bay 2013, 2014, 2016 Contours". Existing conditions for SND dredging design were developed from 2018 survey data and the contours for this surface are provided in the file named "Howards Bay 2018 Contours". DMU boundaries and SND dredge limits are included in separate files that are named accordingly.

EAM 6/15/2020

Section 35 20 23.53 2.1.1 and 2.1.2 With the accuracies listed in these sections and the requirements for the bucket open/close is it the intent that the environmental dredge will be a fixed arm. I.e. an excavator and not a cable crane?

The specifications do not dictate means and methods for achieving the required tolerances for environmenal dredging. The Contractor must choose the means and methods they think will achieve the tolerances required in the specifications.

EAM 6/15/2020

Section 02 61 13 2.3 Is it anticipated that all environmental dredge sediment will require amendment added?

The Government cannot anticipate the extent to which solidification agent will be needed for all environmental dredge sediment.

The Contractor is responsible for determining the minimum amount of solidification agent that needs to be mixed into a given stockpile of dredged material for it to meet the requirements for placement in the offsite disposal facilities

EAM 6/25/2020

Will electrical power be provided for air/bubble curtain required? If power is provided by owner is contractor responsible for electrical usage?

Utilities must be furnished by the Contractor in accordance with Section 01 35 13.10, paragraph 1.4.5.1

EAM 6/23/2020

23 Please provide the volumes for volumes per DMU and area?

Refer to Table 4 of the 100% Design Document Report for breakdown of neatline volumes and footprints by DMU. The values presented in the "95% Plans and Specifications" columns are the final design values.

EAM 6/25/2020

24 Can barges and other floating equipment be stored in the Cummings slip?

The Government does not have real estate agreements allowing storage of floating equipment in Cummings Slip. Fraser Shipyards is a project stakeholder and is the riparian owner of both sides of the slip. The Contractor may enter into a real estate agreement to store equipment in Cummings Slip in accordance with Section 01 10 10, paragraph 1.2.2.

EAM 6/24/2020

25 Please provide and water depth information around Erie pier.

The Government does not have current data at the Erie Pier dock. The contractor is responsible to make their own investigations of the conditions.

EAM 6/23/2020

52.211-10 states “completion of dredging residual cover, and dredged material placement and disposal not later than 15 Oct 2021”. Does this finish date apply to both the environmental dredging and navigational dredging?

15 Oct 2021 applies to both the environmental dredging and navigational dredging EAM 6/15/2020

Can you confirm that cap sand material for biditems 0009 ENR and 0007 Residual Cover is the same material specification as outlined in 35 20 24 2.1? Can this cap material be material that has been dredged from the navigation channel? Material required to be imported to the site?

Material meeting requirements of Section 35 20 24, Paragraph 2.1 shall be used for both ENR Cover (Item 0009) and Residual Cover (Item 0007). ENR Cover shall be placed in DMUs identified on the Drawings. Residual Cover placement will be determined in the field based on confirmation sampling results.

Cover Material shall be clean, imported fill obtained from offsite sources (Section 35 20 24, 2.1.1). Use of SND dredge material is not acceptable.

EAM 6/23/2020

Will quantities for 0009 and 0007 be paid off certified delivery tickets? Is it the intent of the owner to pay for material placed above the 6” design requirement?

Quantities for CLIN 0007 and 0009 will be paid based on certified delivery tickets.

Payment will be for material placed within the specified tolerances.

EAM 6/23/2020

Can material used to build biditem 0008 – Dewatering Area, mostly imported aggregate, be paid for as part of biditems 0020 and 0021 or is the trucking and disposal of this material upon project completion incidental to dredging unit price? Liner material transport and disposal incidental or paid under biditem quantity?

The trucking and disposal of the dewatering area material is incidental to item 0017 Water Treatment. Spec section 01 22 00.00 10 Paragraph 1.3.17.1 states “Item shall include costs to design, install, operate, and maintain (including media changeout) the onsite water treatment system and all associated equipment to treat construction water in accordance with SECTION 02 61 13 EXCAVATION AND HANDLING OF CONTAMINATED MATERIAL. Item shall also include costs to decontaminate and demobilize onsite treatment system components at the completion of work and the required waste characterization, manifesting, and disposal of the spent media from the treatment system.”

EAM 6/23/2020

Is the labor utilized to truck dredge material to the disposal sites subject to prevailing wage requirements? Same question for labor to truck aggregate/sand material to the site.

Labor for trucking material to the disposal sites is subject to prevailing wage requirements. Add WI-15 to the solicitation.

EAM 6/23/2020

Biditem 0017 – Water Treatment. Is it the intent of the owner to pay for additional months of water treatment if the project exceeds the 7 month bid quantity? Pay less than the bid quantity if completed prior to that duration? How will partial months by paid?

How is water treatment start and finish defined.

If water treatment exceeds 7 months, additional time will be added on and paid via a VEQ Modification. If water treatment is shorter than 7 months, only time required will be paid and contract quantity will be paid via a VEQ Modification. Partial months will be paid to the nearest whole month, rounded up. Water treatment start is defined as the date that Contaminated Material Removal begins. Water treatment finish is defined as the date that demobilization of the water treatment facility is completed.

Note that the staging area, which includes demobilization of water treatment facility, must be removed following completion of material handling in accordance with Section 02 61 13, paragraph 3.8 Contaminated Material Dewatering and paragraph

3.7.1 Staging Area.

EAM 6/30/2020

01 35 26 1.6.1.1 states that the contractor is to “Provide a Safety oversight team that includes a minimum of one (1) person at each project site to function as the Site Safety and Health Officer” Can you confirm that this is one person for the entire project and not one person at the dredge/processing area, one at WI Point Landfill, and one at Erie Pier?

The dredge/processing area, WI Point Landfill, and Erie Pier are work areas within the "project site" for this contract. The Contractor must provide at least one full time SSHO for the project site. One person serving as SSHO for the entire project meets this requirement. The contractor must also designate one person for the entire project to serve as an alternate for the SSHO.

EAM 6/30/2020

Per Section 01 45 00.00 10 Quality Control, Section 3.7.2 Testing Laboratories, “All testing laboratories must be accredited by the Department of Defense Environmental Laboratory Accreditation Program (DoD ELAP) and certified or registered under Wisconsin Administrative Code NR 149 for the tests to be performed that have such certifications.”

Question: Can the Department of Defense Environmental Laboratory Accreditation Program (DoD ELAP) requirement be waived? This requirement is preventing a local analytical laboratory from working on this project.

The DOD ELAP requirement will not be waived. EAM 6/22/2020

This is a large and complex project and the site visit is scheduled for June 18 leaving only 12 days to prepare a responsive bid. Can the bid due date be extended two weeks?

Amendment is forth coming which will change the Bid Opening Date to July 14, 2020. DSG 7/1/2020

01 22 00.00 10 1.3.3.1 2nd Paragraph. If a mechanical dredge is used with an environmental dredging bucket and debris is encountered that requires changing the bucket to a rock bucket or grapple, will those tools be considered a “special apparatus”

The paragraph referenced in the inquiry relates to SND. For SND, an environmental bucket is not required, so changing the bucket to a rock bucket or grapple is not considered a special apparatus.

EAM 6/22/2020

O1 35 26 1.7.2.3 b – Does a barge mounted hydraulic dredge excavator require an

NAA?

Excavators mounted to a barge used to dig or dredge material with a bucket must have a Qualified Person analysis that addresses the same hull stability and machine list and trim parameters as in a Floating Crane Naval Architectural Analysis.

EAM 6/24/2020

01 35 29.13 – Is a SSHO and CQM required at each of the dredge site, WPL, and Erie Pier

The dredge site, processing area, WI Point Landfill, and Erie Pier are work areas within the "project site" for this contract.

The Contractor must provide at least one full time SSHO for the project site. One person serving as SSHO for the entire project meets this requirement. The Contractor must also designate one person for the entire project to serve as an alternate for the SSHO.

The Contractor must provide a CQC System Manager that is on the project site at all times during construction. One person serving as CQC System Manager for the entire project meets this requirement. The Contractor must also designate one person for the entire project to serve as an alternate for the CQC System Manager.

The person designated as CQC System Manager cannot also serve as the SSHO.

EAM 6/30/2020

01 45 00.00 10 3.4.3 - Will personnel with substantial work experience in these fields be acceptable in lieu of the dictated degree / major?

Qualifications for Environmental CQC personnel may also include "Construction Manager with 2 years experience in the type of work being performed on this project or technician with 5 yrs. related experience". The applicable specification section will be revised.

Note that a single person can cover more than one CQC area provided that the single person is qualified to perform quality control activities in each designated area and that workload allows.

EAM 6/30/2020

Who is responsible for moving any vessels in the work area? Contractor will coordinate timing with shipyard/ any other adjacent property owners, but please clarify that physically moving docked vessels is not the responsibility of the contractor.

Vessel owners are responsible for physically moving docked vessels. EAM 6/22/2020

Will all DMU’s be cleared and accessible for the Contractor to perform remedial activities?

Vessel owners are responsible for relocating docked vessels and the Contractor is responsible for removing, storing, protecting from damage, and re-installing docks.

The requirements for coordinating these activities must be in accordance with Section 01 35 13.10, paragraph Coordination with Others. The Government cannot comment as to whether DMUs will be accessible, the Contractor must make that determination.

EAM 6/22/2020

41 Is there an active discharge permit for the CDF? There is no active discharge permit for the CDF. PHA 7/1/2020

Please clarify that the fish windows have been waived for dredging under this contract and detail any other applicable work restriction windows applicable to this contract?

It is not clear what is meant by "fish windows have been waived". Dredging is allowed starting 01-May. Work restrictions applicable to this contract are provided in the drawings and specifications.

EAM 6/24/2020

May the berm along the Cumming Slip staging area be altered, if restored after work is completed?

The berm along Cummings Slip staging area must not be altered EAM 6/24/2020

44 May the Cummings Slip staging area be used as the dewatering pad?

The Cummings Slip Staging Area is surrounded by existing berms that must not be modified. Marine access of the area for loading and unloading would require significant effort. This area must not be used for dewatering but may be used for staging land based equipment and stockpiling materials for upland use. Drawing CN105, Note 5 will be revised to specifically prohibit use of this area for dewatering.

EAM 6/30/2020

45 Please provide an as-built for the CDF unloading hard structures?

A FOIA request must be submitted by the Contractor to view Erie Pier CDF As-Built Drawings. Reference Spec Section 35 20 23.43 Paragraph 3.6.2 Erie Pier Disposal Area Transfer and Conveyance for loading limits of the CDF unloading area.

EAM 6/24/2020

Are there any requirements for Contractor’s subcontractors to enter the Shipyard (i.e.

safety training, etc.?)

The Contractor and subcontractors must view the Fraser safety video (approximately 20 minutes) prior to entering the Shipyard. Workers must at minimum wear safety toe boots, hard hat, safety glasses, pants - no shorts, and a PFD when within six feet of the water, while on Fraser property.

EAM 6/24/2020

What is the depth of topsoil presently at the Wisconsin Point Landfill? Can this topsoil be stripped and utilized for the final restoration 6” layer of topsoil?

Current topsoil depth is not known. Topsoil stripping may be performed if elected by the Contractor and documented in the Wisconsin Point Landfill Material Placement Plan approved by the Government and work complies with all requirements of Section 02 66 00, Paragraph 3.1.3, including, but not limited to: stripping material to a maximum depth of 4 inches; testing stripped material to confirm the material meets the requirements of the Specifications for topsoil; placing stripped material below imported topsoil if stripped material does not meet Specifications for topsoil; and complying with erosion control requirements in the Specifications.

EAM 6/30/2020

Please verify that both staging areas will be cleared of equipment, stockpiles, etc. prior to Contractor’s use.

Equipment and material stockpiles will be removed from within the boundaries of the Baxter Ave. Embayment Staging Area and the Cummings Slip Staging Area shown on Sheet CN105 before 24 July 2020.

EAM 6/22/2020

The Erie Borrow material possesses significant vegetation, is the Contractor required to remove the vegetation prior to being placed at Wisconsin Point Landfill?

Vegetation is considered to be a type of deleterious matter. The Contractor is required to obtain material from Erie Pier Borrow Areas that is free of deleterious matter in accordance with Section 02 66 00, paragraph Erie Pier Borrow Material.

EAM 6/22/2020

Should the amount of borrow material fall short to meet the grades on the Drawings, will the Contractor be compensated to procure common borrow from a local source?

The contractor will need to source the borrow material from the designated locations on the drawings. If additional material is necessary, the contractor will need to work with the COR to determine additional areas within Erie Pier.

EAM 6/24/2020

51 Are the air bubble curtains required to operate during non-working hours? Air bubble curtains are required to operate during non-working hours EAM 6/24/2020

Please indicate the difference between the required sampling points and the required post SND or offset sample point. Are sand cores represented on this drawing as well?

"Required Post-SND" are samples collected after SND dredging takes place in DMUs where that are "No Action" or "Enhanced Natural Recovery". "Offset Sampling" are samples collected from areas adjacent to structures in the offset where dredging does not occur. "Required Sampling Points" identified on Drawings CN117 and CN118 are samples collected from ENV dredge areas after ENV dredging takes place. "Required Post-SND or Offset Sampling Points" and "Required Sampling Points" shown on CN117 and CN118 shall be sampled, processed, and analyzed in accordance with the confirmation sampling requirements detailed in Section 35 20 23.53, Paragraph 3.5.4.

Residual Cover Placement Cores are not shown on the Drawings and sampling locations will be determined in the field based on extents of Cover Material placed and results of check surveys.

EAM 6/30/2020

In the event shoaling occurs between SND and environmental dredging, will Contractor be compensated to remove accumulated material? Additionally, will the shoaled sediment be excavated with environmental dredging and paid under this unit rate or will a separate SND dredging event be needed to remove shoaled sediment?

See spec section 35 20 23.43 Strategic Navigation Dredging Paragraph 1.8 Shoal Removal: “If, before the work is completed, shoaling occurs in any section previously accepted by the Government, including shoaling in the finished channel, because of the natural lowering of the side slopes or other natural causes, re-dredging at the Contract unit price, within the limit of available funds, may be performed if agreed upon by both the Contractor and the Contracting Officer.” If additional shoaling occurs between the SND and environmental dredging, additional guidance will be provided by the Contracting Officer at that time.

EAM 6/30/2020

Please confirm that Contractors are to utilize 7.5% portland cement stabilize sediment destined for the Wisconsin Point Landfill, and 4% Calciment to stabilize sediment destined for Vonco Landfill.

If material that has been gravity dewatered for at least 24 hr meets the requirements for placement in the offsite disposal facilities identfied in the specifications, solidification agent is not required.

If material that has been gravity dewatered for at least 24 hr does not meet the requirements for placement in the offsite disposal facilities identfied in the specifications, a solidification agent must be added. The Contractor is responsible for determining the minimum amount of solidification agent that needs to be mixed into a given stockpile of dredged material for it to meet the requirements for placement in the offsite disposal facilities.

Based on the sediment samples collected for the treatability testing, the percentages quoted in the submitted question were the minimum identified in the treatability study to meet the known disposal requirements.

EAM 6/24/2020

Attachment A: Dewatering Treatability Study Report indicates that Calciment is to be sourced from Mintek. Mintek has indicated they will not be able to support the project due to the location. Can an alternative amending agent be provided?

The Contractor may submit a proposed alternative source for solidification agent, or an alternative material to be used as the solidification agent, or both for USACE approval.

EAM 6/30/2020

Can a 2-week extension be provided to afford contractors additional time to prepare a responsive bid and to coordinate with local property owners since the site walk was only conducted on the 16th?

The current response date will not be extended at this time due to the current program schedule. The sitewalk did not alter the specifications provided in the initial solicitation.

DSG 6/18/2020

For scheduling purposes, what is the approximate turnaround time from the time analytical results for the in-water core samples are submitted to the determination of additional re-dredge or no more action required?

As indicated in Section 35 20 23.53, Paragraph 3.5.4.4, Contractor shall allow at least 2 business days between receipt of the results by the Contracting Officer and determination by Contracting Officer of next steps.

EAM 6/30/2020

58 What is the maximum depth of possible re-dredge? (i.e. 2 ft? 3ft?)

The estimated quantity of Environmental re-dredging is included in the Bid Schedule.

Re-dredging depths will be determined in the field based on confirmation sampling results. The maximum depth of possible environmental re-dredging is the depth to native clay for the representative area of a given confirmation sample. Existing sediment core logs are provided in Appendix A of the 100% DESIGN DOCUMENT REPORT attached to the specifications.

EAM 6/30/2020

Will all the material and equipment located in the work area at the Former Baxter Area Embayment be removed prior to the start of work?

Equipment and material stockpiles will be removed from within the boundaries of the Baxter Ave. Embayment Staging Area and the Cummings Slip Staging Area shown on Sheet CN105 before 24 July 2020.

EAM 6/22/2020

Can the Former Baxter Area Embayment be closed to only our work activities or do we need to maintain an access road through the area?

The Baxter Embayment area will be closed to contractor work activities within the staging area boundary lines shown on Sheet CN105. The existing access road between the east and west gates must be left open for use by Fraser Shipyards.

EAM 6/24/2020

Will the ship located in the Cummings Avenue Slip be removed prior to start?

Fraser Shipyards will move the ship in the Cummings Avenue Slip to a different part of the shipyard when it is required by the contractor for access. Fraser will coordinate where it is moved to with the contractor so it is not required to be moved multiple times.

EAM 6/24/2020

Will the current occupants have all their materials and equipment removed from Cummings Slip Staging Area prior to start?

Equipment and material stockpiles will be removed from within the boundaries of the Baxter Ave. Embayment Staging Area and the Cummings Slip Staging Area shown on Sheet CN105 before 24 July 2020.

EAM 6/22/2020

Do trucks need to enter/exit the main gate or can they enter/exit the secondary gate by the Baxter Area Embayment?

The Contractor may use the secondary (West) gate by the Baxter Area Embayment for trucks to enter and exit.

EAM 6/24/2020

64 Can we use the Cummings Slip Staging Area for soil processing and treatment?

The Cummings Slip Staging Area is surrounded by existing berms that must not be modified. Marine access of the area for loading and unloading would require significant effort. This area must not be used for dewatering but may be used for staging land based equipment and stockpiling materials for upland use. Drawing CN105, Note 5 will be revised to specifically prohibit use of this area for dewatering.

EAM 6/30/2020

65 Can we utilize the fenced in area for staging at the Erie Pier?

Contractor use of the fenced in area at Erie Pier will be at the discretion of the COR, pending USACE need to use the area for storage of Government owned equipment.

EAM 6/24/2020

Please clarify WTS sampling/analytical frequency requirements and confirm that continual discharge to sewer is allowable during routine WTS operations.

At a minimum, treated water shall be tested in accordance with Section 02 61 13, Paragraph 3.9.2 and results submitted for approval prior to initial discharge.

Additional testing may be required by the City of Superior.

Once approval for discharge is received, discharge shall comply with Section 02 61 13, Paragraph 3.7.3.3. Discharge during wet weather is prohibited and the discharge location shall be covered when unattended.

EAM 6/25/2020

67 Is there an available water source near Wisconsin Point Landfill?

The Contractor is responsible for providing utilities for its use and should perform their own site investigation.

EAM 6/24/2020

Will the material and equipment located near the existing precast concrete barriers be removed prior to start (at Erie Pier)?

The area in question is part of an allowed contractor storage area for a different project that goes through the end of July 2021. That contractor is allowed to store their equipment through the end of that project. The storage area is outside of the allowed access road that is part of the Howards Bay Project. If the Howards Bay Contractor wants to use this area, please reference spec 01 35 13.10 paragraph

1.4.9 Coordination with Others

EAM 6/24/2020

69 Can we modify the berms located at the Cummings Slip Staging Area? The berm along Cummings Slip staging area must not be altered EAM 6/24/2020

70 Can we access the property to the west of the Cummings Slip Staging Area?

The Government has obtained real estate rights that allow use of the area shown on Sheet CN105. The Contractor may pursue additional agreements allowing use of other areas in accordance with Section 01 10 10.

EAM 6/22/2020

71 Can we modify the containment/dewatering cells if we maintain containment?

Contractor may propose an alternate layout for USACE approval. If USACE does not approve the alternate layout, Contractor shall construct containment areas in accordance with the Specifications and Drawings.

EAM 6/30/2020

72 Please provide the Municipal Separate Storm Sewer System (MS4). The Combined Sewer Overflow Public Notification Plan is provided as an attachment. DSG 7/1/2020

For the sediment processing pad the details shown in the Arcadis drawings and the USACE drawings are different. Which shall be used?

Construct in accordance with the specifications and drawings. Environmental staging area(s) shall have sufficiently low permeability to prevent construction water contact with underlying soil and groundwater.

EAM 6/29/2020

Is bucket mixing an acceptable means of mixing Portland Cement and Dredge Sediment?

It is not entirely clear what is meant by "bucket mixing". Mixing means and methods shall be capable of achieving a relatively homogenous distribution of solidification agent throughout dredged material (Section 02 61 13, Paragraph 3.8). Contractor shall maintain strict dust control during mixing (Section 02 61 13, Paragraph 3.4;

Section 01 57 19, Paragraphs 1.7.9 and 3.5.4) and methods that minimize dust generations are preferred.

EAM 6/25/2020