2024_08_29_SLBE_318729_Amendment_006_Q_A_0006.pdf

Park SLBE

PMIS 318729

Notice ID 140P2024R0048 Link SAM.gov Question No.

Amendment No.

Amendment Date

Sheet or Ref Question Response

1 03 8/6/2024 We would request an extension of 3 weeks to the bid due date based on the requirements of the proposal, coordination efforts between subcontractors, specialty personnel, wildlife biologist, and archeological monitor needed to complete the technical write-up for the project.

Solicitation is extend to Tuesday 10 September 2024 at 1200 Eastern Standard Time. All proposal questions shall be received by Thursday, 29 August at 100 Eastern Standard Time.

2 04 8/13/2024 Can dredged material be re-used for backfill of the new pipe pile?

Dredged material can be re-used for material removed during driveline clearing. Material to be filled within pipe piles shall be a sandy material with less than 10% fines.

3 04 8/13/2024 Are there any additional drawings of the existing dock on the North Island?

Yes, please see attached titled "NMI Docks Archive Drawings"

4 04 8/13/2024 Is there any fill material under the precast panels on the existing North Dock?

Yes. Fill material is noted as Dredged Lake Bottom Sand wrapped in geotextile fabric. Please see attached reference drawings dated January 1987 (NMI Docks Archive Drawings).

5 04 8/13/2024 The specifications state that the dredging is to be performed only by mechanical means. What is the reason for that and would you be open to other options?

We would be open to other options. Please review the soil borings, geotechnical data, geology, and site photos first though. Mechanical means are anticipated to be required due to the high amount of cobbles present onsite. Hydraulic means have been attempted in the past and were not successful due to the cobbles.

Question No.

Amendment No.

Amendment Date

Sheet or Ref Question Response

6 04 8/13/2024 Will new permits be in place prior to work commencing? Permits acquired, pending, and needed to be acquired by the Contractor are listed below. Permits will be in place prior to work commencing.

Design / Govt Furnished Permits Acquired

1. Land Use Permit - Leland Township Planning and Zoning

2. Land Use Permit – Glen Arbor Township Planning and Zoning

3. NMI Septic

Design / Govt Furnished Permits Pending

1. MI EGLE / USACE Joint Permit for Docks (PENDING)

2. Leelanau County Road Commission (PENDING)

3. CZM Consistency / DNR (PENDING)

4. NMI Water Distribution Systems (PENDING)

5. SMI Water Distribution Systems (PENDING)

Contractor Permits Required

1. Electrical

2. NPDES

3. Others, Contractor to verify.

7 04 8/13/2024 The North Island completion date according to Attachment 1 - Project Manual Part 1 states, "Simultaneous work on NMI and SMI is allowed, however NMI dock construction shall be completed prior end of 2025 construction season".

Based on conversations during the bid walk, it was suggested that the contract may have potential to reduce the dredging efforts by removing the dock first and allowing the sand to move on its own. If the new dock needs to be installed prior to the existing being removed, we do not believe that is feasible by the date set if waiting for the sand to move on its own is an option. Is there any flexibility in that completion date?

The requirement noted in Spec 01 11 00 Part 1.3.B. no longer applies following Amendment 01. All work must be completed by the end date of the project noted in the solicitation, 31 December 2026. The Contractor is responsible for scheduling and sequencing the work to be completed by the end date in accordance with all permit and compliance restricitons and/or black-out-dates.

8 04 8/13/2024 Can we dredge outside of the specified dredging zones. Please submit the locations of interest to better inform our responses.

Dredging outside of the specified dredging zones will need to be reviewed for approval. Depending on the locations of interest, this may require engaging EGLE, USACE, NPS internal compliance, and the Michigan DNR.

Amendment No.

Amendment Date

Sheet or Ref Question Response

9 04 8/13/2024 In the bid the building has metal and architectural roofing spec’d can you please confirm with material you are wanting.

Per Specification 13 34 23 part 2.5.B, "Roofing shall be Fabral, 26-gauge, Horizon 16, standing seam panels, with 16 in covered width."

Please see the referenced section for additional information including salient Characteristics.

10 05 8/23/2024 01 27 00 Definition of contract items

3.1 B. Clin 02. Please define sorting of material for

placement on shore and in water.

Assume sorting of materials is not required. CLIN 02 has been updated accordingly.

11 05 8/23/2024 01 27 00 Definition of contract items

3.1 N Clin 14. Temporary access during construction. Is the

contractor’s requirement to maintain access to NMI at the existing dock during construction as part of the base bid?

CLIN removed as part of Amendment 01. Please also see response to comment 7.

12 05 8/23/2024 Steel Piling 31 62 16

1.5 E.1 Pre-installation conference. To be held at the

jobsite 5 days prior to the test pile. Could this be done in Leland or virtual?

Pre-installation conference can be virtual and is to be set up by the Contractor in coordination with the Contracting Officer.

13 05 8/23/2024 Steel Piling 31 62 16

3.0 E.2 Driving tolerances. Maximum 1/8 in/ft out of

plumb. The plans say 2% vertically. Do the plans or specs govern?

Follow requirements listed in specifications and shown in detail 1 on

CT0.1.

14 05 8/23/2024 Steel Piling 31 62 16

3.0 H.1 Cutting-Off. “If directed, pilings must be spliced as required to drive them to depths greater than shown and extend them up to the required top elevation”. If the contractor installs piling to the lengths and depths shown on the plans and is directed to splice onto a piling and continue to drive, would the contractor be paid for the splice and additional length of pling? Also, when would the contractor be instructed to perform this work? If not immediately, then would the contractor be compensated for standby while waiting approvals?

A "Notice of Change" must be submitted in accordance with the "Differing Site Conditions" clause in the Contract. The Government will subsequently review and issue an RFP where warranted. Response to the RFP shall be in accordance with Specification 01 26 01 for Contract Modification Procedures.

Contract modifications will be made when the additional lengths and splices are through no fault of the Contractor. Over-driving of piles resulting in required splices will not result in a contract modification.

The Contractor shall submit a splicing procedure prior to starting any pile driving for COR review.

The Pile Testing (Section 3.2 D), Geotechnical Exploration (Section 3.3), Production Piles (Section 3.4 B.1) as well as clearing of the driving lane, is set up to significantly reduce this risk.

15 05 8/23/2024 Steel Piling 31 62 16

3.4 H 1.b “Pile cut offs will become the property of the

Contracting Office and must be removed from the site.”

Where should the contractor deliver the piling cut offs? +/- 150 pile

Steel Piling Specification has been revised. All pile cut offs will become the property of the Contractor and must be removed from the Site.

Amendment No.

Amendment Date

Sheet or Ref Question Response

16 05 8/23/2024 Steel Piling 31 62 16

3.4 K. This section asks for a pile driving survey to the

nearest half inch in both directions, and to be prepared and certified by a land surveyor licensed in the State of Michigan. The contractor is to also provide tip elevations and pile driving records. Is the survey by a certified land surveyor licensed in Michigan necessary?

Provide survey either under the direct supervision of a professional engineer licensed in the state of Michigan or completed by a licensed surveryor licensed in the state of Michigan.

17 05 8/23/2024 Steel Piling 31 62 16

3.3 B. Can these borings be performed in the fall of 2024? Yes.

18 06 8/29/2024 Steel Piling 31 62 16

3.3 D.1.b Excavate a minimum of 5 feet below mudline to

clear any debris in the driveline that may impede the installation of the piles. Can the excavated material be sidecast? Are there any restrictions to the depth the contractor can pre dig the driveline?

Revised spec section 3.4.D.1.b to read:

"Probe driveline minimum 5 feet below mudline and clear any debris which may impede the installation of the piles. Any excavation required within the area where pilings are to be installed must be completed prior to placing pilings. The production pile may not be used to clear the drive line."

If excavation is required to remove debris in the driveline, then the excavated materials may temporarily be sidecasted. After removal of the debris, the sidecasted materials must be moved back to where they were excavated from.

No excavation greater than 10 feet below existing mudline may be performed. If excavation greater than 10 feet below existing mudline is required, the Contractor shall notify the CO.

19 05 8/23/2024 Steel Piling 31 62 16

3.5 A. How would the contractor be compensated should

the contractor encounter more obstructions than the 40% shallow obstructions and 10% of the deep obstructions?

A "Notice of Change" must be submitted in accordance with the "Differing Site Conditions" clause in the Contract. The Government will subsequently review and issue an RFP where warranted. Response to the RFP shall be in accordance with Specification 01 26 01 for Contract Modification Procedures.

20 05 8/23/2024 Steel Piling 31 62 16

3.5 G. If a driven pile encounters an obstruction and is

damaged during installation, the Contractor shall remove and replace the pile at no additional cost to the Contracting Officer. If the Contractor has installed the pile to the lines and grades shown on the plans but hits an unknown obstruction and damages the pile. Would the contactor be compensated for the damaged and new pile? Would this event be considered for a change order?

A "Notice of Change" will be considered for any obstructions beyond the percentages noted in spec 31 62 16 (see comment 19).

Contractor shall submit alternate methods for handling obstructions.

This should be included in the pile installation submittal, and discussed in detail at the pre-installation conference.

Amendment No.

Amendment Date

Sheet or Ref Question Response

21 05 8/23/2024 Steel Piling 31 62 16

3.5 H. Shallow or Deep obstructions. Both are defined as

stated. If a contractor follows the mitigation efforts stated and tries other contractor stated methods, but is not successful in mitigating the obstruction, what is the consequence of failure?

A "Notice of Change" must be submitted in accordance with the "Differing Site Conditions" clause in the Contract. The Government will subsequently review and issue an RFP where warranted. Response to the RFP shall be in accordance with Specification 01 26 01 for Contract Modification Procedures.

22 05 8/23/2024 Steel Piling 31 62 16

3.7 A.1. If the test piles are not incorporated into the

finished work, can they be extracted or cut off at an elevation?

The test piles must be extracted.

23 05 8/23/2024 35 01 50 Maintaining

Island Access

3.3 Temporary Dock Design. Can the existing North

Manitou Dock be the temporary dock?

CLIN removed as part of Amendment 01. Please also see response to comment 7.

24 05 8/23/2024 35 20 13 Dredging

3.2 H. Why are BMPs for environmental dredging required

at this location?

Anticipated BMPs are listed on drawing sheet CN1.6. Sections 3.2 H.1 and 3.2 I.6 have been removed from specification 35 20 13.

25 05 8/23/2024 35 20 13 Dredging

Drawing Sheet 181(CT3.0): Are the cover plates attached to the concrete or the steel? Detail 4 on drawing CT3.2 sheet 183 of 188 does not seem to show any connection.

Fasten the cover plate to the steel pipe pile with minimum 1/8" fillet weld.

26 05 8/23/2024 35 20 13 Dredging

Drawing Sheet 182 (CT3.1): Detail 1 pipe piles require sand fill to elevation 581.15’ then concrete fill to the top of the pipe pile. What is the purpose of concrete? Could the piles be fully sand filled then weld a cap to the top of the pipe pile?

Concrete provides additional stiffness to the pipe wall at the connections. Provide concrete fill as shown in the plans and details.

27 05 8/23/2024 35 20 13 Dredging

Drawing Sheet 184 (CT 3.3): Detail 6 the welded connections under the precast concrete, after they are installed, what is the remedy if the heat from the weld pops the concrete? If the water elevation is at its current level or higher and the weld connection cannot be made due to lack of space between water and concrete what is the remedy for this?

Welding to embed plates is common practice in for attaching precast plank to steel structures. The heat generated for the 1/4" fillet weld should not be high enough and for a long enough duration to cause overheating of the concrete.

Concrete planks shall cure minimum 7 days prior to welding activities.

If water level is above the weld locations, utilize underwater welding techniques to complete the welds.

28 05 8/23/2024 35 20 13 Dredging

Drawing Sheet 184 (CT3.3): Detail 4 is grinding off the galvanizing, welding a connection, and spray galvanizing acceptable for connections that require this during installation?

Yes, this is an acceptable method for installation.

Amendment No.

Amendment Date

Sheet or Ref Question Response

29 05 8/23/2024 35 20 13 Dredging

Drawing Sheet 186 (CT3.5) Detail 1 welded connections for the hooks on top of the new piles is currently under water.

Is the abutment intended to be built in the dry with a cofferdam or can the design elevation of the piles raise to above water?

The top of the piles in the abutment may be raised up above the water level provided the dock elevation as shown remains unchanged and appropriate cover and clearances are provided. Such changes may be proposed for review by the Government and the Government's designer of record after award, during submittal and shop drawing reviews.

30 05 8/23/2024 35 20 13 Dredging

Drawing Sheet 183 (CT3.2): Detail 1 and Detail 2 depict the OHWM at different elevations on the detail drawings please provide the correct OHWM line for each detail.

NAVD88 OHWM: 581.75'

NAVD88 LWD: 577.75'

Drawing Sheet 183 has been revised to more accurately depict this.

31 05 8/23/2024 Was attendance at the prebid meeting was mandatory for companies to bid prime.

No, attendance was not mandatory.

32 05 8/23/2024 We are working on confirming the needed scope of services for the Wildlife Biologist and would like to know if an “IPaC report” was available or any other information that would help define what species of wildlife and plants are present.

An official IPaC species list was generated and informed the Biological Assessment that was submitted to USFWS. NPS is awaiting the USFWS Biological Opinion which will confirm conservation measures and mitigations. The Final BA has been included as part of this Amendment.

33 05 8/23/2024 Is Contractor required to carry Builder’s Risk insurance for this project?

Insurance requirements are provided in contract clause 1452.228-70, Liability Insurance (page 42 of 78 in the contract clauses).

34 05 8/23/2024 Can the site safety supervisor also be the site superintendent or is this a standalone position?

It is permissible for the Superintendent to also be the On-Site Safety Manager.

35 05 8/23/2024 If the site safety supervisor has no other tasks, does the site safety supervisor need to be on site every day while work is in progress?

The site safety supervisor is required to be on-site to perform the duties noted in specification 01 35 23.

Amendment No.

Amendment Date

Sheet or Ref Question Response

36 06 8/29/2024 01 50 00 In spec section 15000, we are instructed to provide 3000 gallons of diesel fuel per season per island. What are the sizes of the existing diesel tanks on the islands?

Ultimately, this would determine how many deliveries of diesel would be required to each island.

The diesel fuel tank capacity is 1,000 gallons on North Manitou Island and 6,000 gallons on South Manitou Island. The contractor is required to supply the diesel per season.

Transporting of the fuel will need to be coordinated with the Park through the CO. This will be done over several trips because the Park can only haul 420 gallons at a time. Alternatively, the Contractor may submit a spill prevention plan / safety contingency plan for Government Review. A plan reviewed and accepted by the Government would allow the Contractor to transport to and fill the existing island tanks.

37 06 8/29/2024 01 50 00 Spec section 01 50 00 -2 states that contractor must use existing vault toilets on the islands but also states on 01 50 00 – 4 that contractor must provide his own temporary toilet facilities. Please advise.

Contractor must use existing vault toilets on the islands. The CO / Park has equipment and means to remove waste safely and plans to maintain the vault toilets throughout the duration of the project.

Contractor shall coordinate with the CO / Park frequency of removal activities required.

38 06 8/29/2024 1. In setting up our camps, we intend to have a kitchen area for the use of the workers. This kitchen area would require running water and would produce wastewater.

a. Would NPS allow Contractor to run temporary water service from the existing water infrastructure? The temporary service would be abandoned upon demobilization.

b. Would NPS allow the wastewater to flow into a tank that would be removed and replaced at intervals? If this is not acceptable, please provide an alternative.

The Park will allow tie-in to existing water infrastructure on the islands for use in a kitchen area for Contractor use. This will need to be coordinated with the Park through the CO. Contractor shall provide anticipated water usage rates / quantities for coordination with the CO.

Contractor will be allowed to remove wastewater from the kitchen areas as described and must coordinate this activity with the Park through the CO. The Waste Management Plan required in Spec Section 01 74 19 Construction Waste Management and Disposal must include this activity for CO review.

39 06 8/29/2024 Can a wage rate be provided for Water Well Drillers and Laborers (as well as apprentices).

NPS will submit a request to DOL for a wage rate. Apprenticeship programs must be within Department of Labor regulations.

Amendment No.

Amendment Date

Sheet or Ref Question Response

40 06 8/29/2024 31 11 13 Section 2.3 of spec section 33 11 13 - 3 calls submersible well pumps that would hang on 2” drop pipes. Paragraph M on 33 11 13 – 7 alludes to a line shaft well pump.

Please confirm that the intent is to use the Franklin electric submersible pumps and not line shaft turbine pumps.

Franklin electric submersible pumps to be used. Specification Section 33 11 13 has been updated to reflect this clarification.

41 06 8/29/2024 31 11 13 Per paragraph 2.1 of 33 11 13-2, we are to use threaded and coupled steel casings. Line “G” of 33 11 13-6 states that all joints are to be butt welded. Please confirm that the joints are to be threaded and coupled.

Joints to be threaded and coupled. Specification Section 33 11 13 has been updated to reflect this clarification.

42 06 8/29/2024 Please confirm that the Trude Cottage addition will not be conditioned space. No heaters or other mechanical equipment are shown on the drawings.

The addition to Trude Cottage will be a conditioned space. Baseboard heaters are shown - reference Detail 1 on Sheet EJ1.0. The cottage will not be air conditioned.

43 06 8/29/2024 Please clarify if Contractor Performance Assessment Reports will be accepted in lieu of the Past Performance Questionnaires requested in Factor 6 - Past Performance.

CPARS reports are in addition to Past Performance Questionnaires, not in lieu of them.

44 06 8/29/2024 Are Government Furnished Permits and/or relevant conditions available to review before the bid is due? If not, what is the anticipated schedule to receive Government Furnished Permits?

Please see response to comment 6. Permits are anticipated Fall 2024.

For anticipated permit requirements, please see the project manual.

45 06 8/29/2024 01 11 00 01 11 00-4: 1.9: There is a discrepancy between two sections of the Project Manual (Part 1) regarding the window for the cutting/trimming of trees. 1.9 B2a states said activity may occur from October 1 through April 15 and 1.10 B6b states October 1 through May 15, for trees exhibiting a DBH of 3 inches or more. Clarification is needed to determine the need for a wildlife biologist during clearing activities.

Wildlife Biologist is not required if the trees are cut within the allowable window, October 1 through April 15

46 06 8/29/2024 01 11 00 01 11 00-4: 1.10 15A states “A restoration plan shall be in place for restoration of trees, vegetation, and soils after construction activities are complete.” As this plan is not listed as a Contractor deliverable, will the NPS supply this plan for Contractor coordination?

Specification and associated project submittal list has been updated to note the restoration plan is to be provided by the Contractor for review and approval.

Amendment No.

Amendment Date

Sheet or Ref Question Response

47 06 8/29/2024 C0.0 Plan Sheet C0.0 13of188:

General Site Demolition and Clearing Notes – indicates contractor responsible for documenting existing conditions prior to start of work. What is required?

See Specification 02 41 13 Selective Site Demolition 1.3B. Pre-work photographs or video before work begins. Post-demolition photographs or videos will be required based on 02 41 13 Selective Site Demolition 1.3C.

48 06 8/29/2024 CT3.5 Plan sheet CT3.5 Detail 5 – indicates armor stone below “insitu sand”.

Is this sand to be remove and replaced to place armor stones? If so, what are the requirements for placing the sand back above the armor stone?

If there is no insitu sand, is sand required to be place after armor stones placement? if so, to what elevation?

Please provide top of abutment elevation.

No specification section was presented for the precast panels to be used on the dock. Please clarify specification requirements for precast panels to be used on the dock.

Remove insitu sand as required to install armor stone. Sand to be placed on top of armor stones to create a "buried revetment". Top of sand should match the top of the abutment with the exception of dock structural conflicts (i.e., precast panels). Details 1/CT3.5 and 4/CT3.5 have been updated for clarification.

Top of the abutment to match the top of dock plank elevation.

Concrete requirements are detailed in specification section 03 33 00.

The reinforcement, embed plates, and lifting lug placement requirements are identified on plans and in details.

49 06 8/29/2024 31 62 16 31 62 16 -9: 3.3:

Please provide a Maximum required boring depth at which point no more data is required.

2 borings are indicated in this section, but no location.

Please provide approximate location of borings to be taken.

Can SPT be increased to 5ft intervals after 20ft of soil penetration?

Please confirm - proposed geotechnical investigation will assume no rock boring, rock boring to be treated as an unforeseen condition.

Is it required for the third party geotechnical consultant to be on-site for production pile installation, or can the contractor provide installation records for production piles?

Borings may be terminated at 90 feet.

Approximate locations of soil borings are indicated on plan sheets CT1.1, CT1.2, and CT2.2.

Yes, SPT may be increased to 5-ft intervals after 20-ft of soil penetration.

Proposed geotechnical investigation assumes no rock boring and is considered unforseen conditions. However, if bedrock is encountered, Contractor should be prepared to take rock cores without additional mobilization/demobilization requirements.

Contractor can provide installation records for the production piles.

The installation records will need to be verified and certified by a third party geotechnical consultant.

Amendment No.

Amendment Date

Sheet or Ref Question Response

50 06 8/29/2024

Confirm the only required contracting goal for non-large business contractors is 25% SBE.

Please see page 74-78 of the solicitation package including the language copied here from page 74. SMALL BUSINESS SUBCONTRACTING PLAN: Small business offerors are not required to submit a subcontracting plan; however, large business offerors shall complete and submit the attached Subcontracting Plan Form in response to the requirements of clause 52.219-9.

The NPS subcontracting goals for Fiscal Year 2024 are: Small Businesses (42%), Small Disadvantaged Businesses (10%), Women- Owned Businesses (5%), HUBZone (3%), and Service Disabled Veteran- Owned Businesses (5%), Indian Small Business Economic Enterprises

(ISBEE) (3%)

Subcontracting plans that contain goals less than the NPS goals shall include rationale as to why the above goals cannot be met.

51 06 8/29/2024 The there are other contracting goals non-large business contractors please clarify what those are.

See response to question 50

52 06 8/29/2024 For a contractor to be consider a Small Business please confirm that the only requirement is that the annual value is below $45-million annually along with employees listed on page 52 of document #140P2024R0048.

a.Is the $45-million an average over several years or past year only?

Please see FAR 52.219-8 which contains a link to 13 CFR part 121 for small business size regulations. You may also contact your local Apex Accelerator for more information https://www.apexaccelerators.us/#/service-area-locator

53 06 8/29/2024 Confirm that for a company to be considered a Small Business it does not need a certification/document stating that they are a Small Business.

Status as a small business is checked in SAM.gov no other certification is needed.

54 06 8/29/2024 If we were to fall short of the goal is there any consideration for an exemption.

See response to question 50

55 06 8/29/2024 Is the Environmental Manager required to be on-site full-time while work is taking place?

The Environmental Manager must be on-site for all applicable work responsibilities (see Spec 01 31 00 Par 1.8.A.2). Where on-site work does not include the noted responsibilities, the Environmental Manager is not required to be present. The Contractor is responsible for ensuring compliance compliance with the Project Manual, Drawings, permits, and all other applicable items.

Amendment No.

Amendment Date

Sheet or Ref Question Response

56 06 8/29/2024 Please confirm whether the Environmental Manager can also be the site superintendent.

It is permissible for the Superintendent to also be the Environmental Manager provided they meet the required qualifications. However, the Superintendent may only perform two (2) project roles including Superintendent. Coordinate with comment 34.

57 06 8/29/2024 Please confirm that the Quality Control Supervisor must be on site full time while work is taking place.

The Quality Control Manager must be on site at all times that work is being performed.

58 06 8/29/2024 Can you please explain the role of the wildlife biologist beyond conducting bird and bat surveys? For instance, will the biologist need to be on site to assist the CO? We are trying to get a sense for whether the biologist is required at certain intervals or whether this is a full-time role.

Please reference Spec 01 11 00 Part 1.10.B.4. Beyond the surveys, further coordination with the CO is not anticipated. However, the Contractor may consider utilizing the Contractor's Wildlife Biologist to help develop and/or coordinate the Communication Plan / Mitigation Plan submittal (see submittal list).

59 06 8/29/2024 The drawings for Trude cottage currently do not show an existing addition on the west side of the building. After reviewing our walk-through photos, it appears that there is already an addition built onto the Trude Cottage where the new addition is supposed to go per CLIN 18. Would this need to be demolished? Please advise. (See attached picture)

Please reference Spec 02 41 01 Part 3.01.A which notes "Remove portions of the Trude Cottage building. 1. The NPS will remove portions of the Trude Cottage on North Manitou Island, now shown to be demolished, in the Summer of 2024."

60 06 8/29/2024 Steel Piling 31 62 16

2.3.F

Spec Section Steel Piling 31 62 16 2.3.F states jetting will not be permitted. Is this only for installation? Will jetting be permitted for the demo and removal of existing piling?

There are 69 battered and 69 vertical H-piles to be removed within the existing North Manitou Dock and jetting could be required for removal. Jetting is acceptable for the demo and removal of existing piling.

61 06 8/29/2024 Amendment 4 contained historical drawings of the North Manitou dock. Drawings do not give a length of the vertical and battered piling within the sheet piling. Is the length of these piling available?

There is no formal documentation regarding the lengths of the vertical and battered pilings withing the sheet piling. From the Preliminary Design Report for the North Manitou Island Docking Facility dated October 1985, the total estimated linear footing of vertical and battered piling was estimated at 11,040 LF => an average length of 80' assuming 69 vertical and 69 battered piles. This report has been attached to this amendment for reference.

62 06 8/29/2024 31 62 16 1.7.A

Spec Section 31 62 16 1.7.A. talks about soil borings on both North and South Manitou dock locations. Can you please provide these soil borings?

Referenced soil borings from June 1985, June 2011, as well as soil borings from May 1982 have been included in this amendment.

Refence March 1984, October 1985, and July 2011 reports.

Amendment No.

Amendment Date

Sheet or Ref Question Response

63 06 8/29/2024 31 62 16 3.5.A

Spec Section 31 62 16 3.5.A Says to anticipate shallow obstructions at 40% of the piles and deep obstructions at 10% of the piles. Section 1.7 describes the subsurface conditions as uniform sand with no mention of obstructions. How were these percentage values derived?

Is there historical pile driving records or data available?

Assumptions were made to provide a basis for bidding. The predominant native materials onsite are sands; however, there is gravel, cobble, and even boulder inclusions. Existing piling (at the historical dock location), remnants of structures, and misc. debris are reasonably anticipated to be encountered.