Amend_05_Attachment_0005.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 Pending Pending 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?

PENDING GOVT Response

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.

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 Maintainin g 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.

Amendment No.

Amendment Date

Sheet or Ref Question Response

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.

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.

Amendment No.

Amendment Date

Sheet or Ref Question Response

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.

SLBE 318729 01 27 00 - 1

012721 DEFINITION OF CONTRACT LINE ITEMS

SECTION 01 27 00

DEFINITION OF CONTRACT LINE ITEMS

PART 1 – GENERAL

1.1 SUMMARY

A. Section explains in general, what is and is not included in a contract line item, and limits or cut-off points where one item ends and another begins.

B. If no contract line item exists for a portion of work, include costs in a related item.

C. NMI - North Manitou Island

D. SMI - South Manitou Island

PART 2 - PRODUCTS (Not Used)

PART 3 - EXECUTION

3.1 LIST OF CONTRACT LINE ITEMS

A. Contract Line Item Number (CLIN) 01 (Base Bid): NMI – Dock Replacement

1. This item consists of demolition of existing dock as well as construction of new dock per the drawings and the specifications. This line item also includes the geotechnical exploration and pile testing program to confirm the design parameters. New dock construction includes steel framing, concrete deck and accessories. Dock abutment and contractor access connecting park facilities is included in this item.

2. Measurement for payment will be lump sum or percentage complete of line item per scheduled value.

3. Payment will be made at the contract lump sum price.

B. CLIN 02 (Base Bid): NMI – Dredging, Sorting and Placement

1. This item consists of mechanical and and/or hydraulic dredging, sorting material for placement and placement of dredged materials on shore and in water and placement of dredged material per the drawings and the specifications.

2. Measurement for payment will be lump sum or percentage complete of line item per scheduled value.

3. Payment will be made at the contract lump sum price.

C. CLIN 03 (Base Bid): SMI – Dock Replacement

1. This item consists of demolition of existing dock as well as construction of new dock per the drawings and the specifications. This line item also includes the geotechnical exploration and pile testing program to confirm the design parameters. New dock construction includes steel framing, concrete deck and accessories. Dock abutment and trail connecting park facilities is included in this item.

2. Measurement for payment will be lump sum or percentage complete of line item per scheduled value.

3. Payment will be made at the contract lump sum price.

VDesai Cloud

SLBE 318729 01 27 00 - 2

D. CLIN 04 (Base Bid): SMI – Replace-In-Kind Electrical and PV System

1. This item consists of rehabilitation of existing Electrical and PV Systems in accordance with drawings and specifications.

2. Measurement for payment will be lump sum or percentage complete of line item per scheduled value.

3. Payment will be made at the contract lump sum price.

E. CLIN 05 (Bid Option #1): NMI – Replace-In-Kind Electrical and PV System

1. This item consists of rehabilitation of existing Electrical and PV Systems in accordance with drawings and specifications.

2. Measurement for payment will be lump sum or percentage complete of line item per scheduled value.

3. Payment will be made at the contract lump sum price.

F. CLIN 06 (Bid Option #2): NMI – Replace-In-Kind Septic System

1. This item consists of rehabilitation of existing Septic Systems, including demolition of existing leach fields and installation of new systems and laterals between buildings and leach field in accordance with drawings and specifications. Contractor shall be responsible for preparation of permits, submission, application, approval and start-up.

2. Measurement for payment will be lump sum or percentage complete of line item per scheduled value.

3. Payment will be made at the contract lump sum price.

G. CLIN 07 (Bid Option #3): NMI – Replace-In-Kind Water System

1. This item consists of rehabilitation of existing Water Systems, including installation of two water wells, construction of well house, water treatment system and replacement of water distribution system including piping, monuments, valves and pump out structures in accordance with drawings and specifications.

2. Measurement for payment will be lump sum or percentage complete of line item per scheduled value.

3. Payment will be made at the contract lump sum price.

H. CLIN 08 (Bid Option #4): NMI – Replace-In-Kind Fuel System

1. This item consists of rehabilitation of existing Fuel Systems including replacement of gasoline fuel tank, associated fuel pump and diesel fuel lines between diesel tank and generator room in accordance with drawings and specifications.

2. Measurement for payment will be lump sum or percentage complete of line item per scheduled value.

3. Payment will be made at the contract lump sum price.

I. CLIN 09 (Bid Option #5): NOT USED

J. CLIN 10 (Bid Option #6): SMI – Replace-In-Kind Water System

1. This item consists of rehabilitation of existing Water Systems, including installation of two water wells, construction of well house, water treatment system and replacement of water distribution system including piping, monuments, valves and pump out structures in accordance with drawings and specifications.

2. Measurement for payment will be lump sum or percentage complete of line item per

SLBE 318729 01 27 00 - 3

K. CLIN 11 (Bid Option #7): SMI – Replace-In-Kind Fuel System

1. This item consists of rehabilitation of existing Fuel Systems including replacement of waste oil tank, new gasoline tank and associated fuel pump in accordance with drawings and specifications.

2. Measurement for payment will be lump sum or percentage complete of line item per scheduled value.

3. Payment will be made at the contract lump sum price.

L. CLIN 12 (Bid Option #8): NMI – Preservation Maintenance of External Envelopes of

Historic Structures - Roofing (LRF)

1. This item consists of external improvements (roofs, siding, paint, etc.) of buildings listed below in accordance with drawings and specifications. The building to be included within this line items include:

a. USLSS Lifeboat Station QTRS (FMSS# 1849)

b. Howard Foot Cottage (FMSS# 1860)

c. Hans Halseth House QTRS (FMSS# 1851)

d. Margaret Riggs Cottage (FMSS# 1859)

e. Margaret Riggs Generator Building (FMSS# 99884)

f. Margaret Riggs Cottage Shed (Missing) (FMSS# 51620)

g. USLSS Dwelling QTRS (FMSS# 1848)

h. Trude Cottage (FMSS# 1861)

i. Assn Generator Building (FMSS# 1981)

2. Measurement for payment will be lump sum or percentage complete of line item per scheduled value.

3. Payment will be made at the contract lump sum price.

M. CLIN 13 (Bid Option #9): SMI – Preservation Maintenance of External Envelopes of

Historic Structures - Roofing (LRF)

1. This item consists of external improvements (roofing only) of buildings listed below in accordance with drawings and specifications. The building to be included within this line items include:

a. Benth Johnson/Kelder House QTRS (FMSS# 1826)

b. Tobin, John & Lottie House QTRS (FMSS# 1830)

c. Hutzler, George I & Selma QTRS (FMSS# 1832)

d. Hutzler, George C & Mary Ann Farmhouse (FMSS# 1877)

e. Hutzler, George C & Mary Ann Barn (FMSS# 1878)

f. Hutzler, George C & Mary Ann Shed #1 (FMSS# 1879)

g. Hutzler, George C & Mary Ann Shed #2 (FMSS# 86019)

h. Keeler, Ory & Betty House QTRS (Shirk House) (FMSS# 1831)

i. SMI Maintenance Shop (FMSS# 1838)

j. Kramer QTRS (FMSS# 1824)

k. Robinette, Ray and Violet House / Burdick (FMSS# 1827)

l. USLSS Dwelling QTRS (SMI Life Saving Station) (FMSS# 1819)

m. Beck, August & Elizabeth House (FMSS #1829)

n. Beck, August & Elizabeth Shed (FMSS #1874)

o. USLSS Boathouse #1 and Launchway (FMSS #1868)

p. USLSS Small Shed (FMSS #1870)

q. Johnson, Benth House QTRS (FMSS# 1825)

SLBE 318729 01 27 00 - 4

2. Measurement for payment will be lump sum or percentage complete of line item per scheduled value.

3. Payment will be made at the contract lump sum price.

N. CLIN 14 (Bid Option #10): NOT USED

O. CLIN 15 (Bid Option #11): NMI – Preservation Maintenance of External Envelopes of

Historic Structures (LRF)

1. This item consists of external improvements (siding, paint, etc.) of buildings listed below in accordance with drawings and specifications. The building to be included within this line items include:

a. USLSS Lifeboat Station QTRS (FMSS# 1849)

b. Howard Foot Cottage (FMSS# 1860)

c. Hans Halseth House QTRS (FMSS# 1851)

d. Margaret Riggs Cottage (FMSS# 1859)

e. Margaret Riggs Generator Building (FMSS# 99884)

f. Margaret Riggs Cottage Shed (Missing) (FMSS# 51620)

g. USLSS Dwelling QTRS (FMSS# 1848)

h. Trude Cottage (FMSS# 1861)

i. Assn Generator Building (FMSS# 1981)

2. Measurement for payment will be lump sum or percentage complete of line item per scheduled value.

3. Payment will be made at the contract lump sum price.

P. CLIN 16 (Bid Option #12): NMI – Preservation Maintenance of External Envelopes of

Historic Structures - Roofing (Repair Rehab/Cyclic)

1. This item consists of external improvements (roofing only) of buildings listed below in accordance with drawings and specifications. The building to be included within this line items include:

a. USLSS Crew Ready QTRS (FMSS# 1850)

b. USCG Generator Building (FMSS# 2649)

c. Hans Helseth Shed (FMSS# 1986)

d. 1854 Volunteer Rescue Station (FMSS# 1997)

2. Measurement for payment will be lump sum or percentage complete of line item per scheduled value.

3. Payment will be made at the contract lump sum price.

Q. CLIN 17 (Bid Option #13): NMI – Preservation Maintenance of External Envelopes of

Historic Structures (Repair Rehab/Cyclic)

1. This item consists of external improvements (siding, paint, etc.) of buildings listed below in accordance with drawings and specifications. The building to be included within this line items include:

a. USLSS Crew Ready QTRS (FMSS# 1850)

b. USCG Generator Building (FMSS# 2649)

c. Hans Helseth Shed (FMSS# 1986)

d. 1854 Volunteer Rescue Station (FMSS# 1997)

2. Measurement for payment will be lump sum or percentage complete of line item per

SLBE 318729 01 27 00 - 5

R. CLIN 18 (Bid Option #14): NMI – Rehabilitation of Trude Cottage.

1. This item consists of improvements to Trude Cottage including installing an addition, connection of electrical, water and sanitary system from utility stub outs. New fire suppression system at Trude Cottage is also included within this CLIN.

2. Measurement for payment will be lump sum or percentage complete of line item per scheduled value.

3. Payment will be made at the contract lump sum price.

S. CLIN 19 (Bid Option #15): NOT USED

T. CLIN 20 (Bid Option #16): SMI – Dock Support Infrastructure.

1. This item consists of installation of proposed infrastructure, including well house, water well, drinking fountains, PV system, vault toilets and pavilion, adjacent to new dock at

Chicago Road and improvements to Chicago Road including turnaround near shoreline and roadway connecting to Ohio Rd. in accordance with the drawings and the specifications.

2. Measurement for payment will be lump sum or percentage complete of line item per scheduled value.

3. Payment will be made at the contract lump sum price.

U. CLIN 21 (Bid Option #17): SMI – Preservation Maintenance of External Envelopes of

Historic Structures (LRF).

1. This item consists of external improvements (siding, paint, etc.) of buildings listed below in accordance with drawings and specifications. The building to be included within this line items include:

a. Benth Johnson/Kelder House QTRS (FMSS# 1826)

b. Tobin, John & Lottie House QTRS (FMSS# 1830)

c. Hutzler, George I & Selma QTRS (FMSS# 1832)

d. Hutzler, George C & Mary Ann Farmhouse (FMSS# 1877)

e. Hutzler, George C & Mary Ann Barn (FMSS# 1878)

f. Hutzler, George C & Mary Ann Shed #1 (FMSS# 1879)

g. Hutzler, George C & Mary Ann Shed #2 (FMSS# 86019)

h. Keeler, Ory & Betty House QTRS (Shirk House) (FMSS# 1831)

i. SMI Maintenance Shop (FMSS# 1838)

j. Kramer QTRS (FMSS# 1824)

k. Robinette, Ray and Violet House / Burdick (FMSS# 1827)

l. USLSS Dwelling QTRS (SMI Life Saving Station) (FMSS# 1819)

m. Johnson, Benth House QTRS (FMSS# 1825)

2. Measurement for payment will be lump sum or percentage complete of line item per scheduled value.

3. Payment will be made at the contract lump sum price.

V. CLIN 22 (Bid Option #18): SMI – Preservation Maintenance of External Envelopes of

Historic Structures - Roofing (Repair Rehab/Cyclic).

1. This item consists of external improvements (roofing only) of buildings listed below in accordance with drawings and specifications. The building to be included within this line items include:

a. USLSS Wood Shed (FMSS# 1871)

b. USLSS Boat House #2 (FMSS# 1869)

c. Thomas & Hattie Thompson Privy (FMSS# 1892)

d. Post Office Tom Thompson (FMSS# 1867)

SLBE 318729 01 27 00 - 6

e. Hutzler, George C Privy (FMSS# 86011)

f. Hutzler, George C & Mary Ann Chicken Coop (FMSS# 87518)

g. Hutzler, George C (Riker) Garage (FMSS# 1880)

h. E. Tobin Cottage (FMSS# 51760)

2. Measurement for payment will be lump sum or percentage complete of line item per scheduled value.

3. Payment will be made at the contract lump sum price.

W. CLIN 23 (Bid Option #19): SMI – Preservation Maintenance of External Envelopes of

Historic Structures (Repair Rehab/Cyclic).

1. This item consists of external improvements (siding, paint, etc.) of buildings listed below in accordance with drawings and specifications. The building to be included within this line items include:

a. USLSS Wood Shed (FMSS# 1871)

b. USLSS Boat House #2 (FMSS# 1869)

c. Thomas & Hattie Thompson Privy (FMSS# 1892)

d. Post Office Tom Thompson (FMSS# 1867)

e. Hutzler, George C Privy (FMSS# 86011)

f. Hutzler, George C & Mary Ann Chicken Coop (FMSS# 87518)

g. Hutzler, George C (Riker) Garage (FMSS# 1880)

h. E. Tobin Cottage (FMSS# 51760)

2. Measurement for payment will be lump sum or percentage complete of line item per scheduled value.

END OF SECTION 01 27 00

COMPREHENSIVE FACILITY REHABILITATION ON MANITOU ISLANDS 35 20 13 - 1

SLBE 318729 DREDGING

SECTION 35 20 13

DREDGING

PART 1 - GENERAL

1.1 SUMMARY

A. Section includes:

1. Furnishing suitable mechanical dredging equipment, performing all work required to remove the specified materials from within the prescribed work area limits as indicated, and transporting and disposing of the dredge material within an approved material placement area. The work includes conducting an initial investigation of existing conditions, furnishing all equipment, supplies, tools, performance of labor and services, and all incidentals necessary to complete the dredging, transporting, and placement of material in an approved suitable disposal area.

2. The Contractor is responsible for making necessary arrangements with the Contracting Officer to assure satisfactory completion of dredging in the vicinity with a minimum interruption of service, and shall perform their operations in such a manner to avoid damage to existing facilities which are to remain.

1.2 REFERENCES

A. General Requirements Sections of Division 01 and the Drawings apply to Work of this Section.

B. Michigan Department of Environment, Great Lakes, and Energy (EGLE) Dredging Standards.

C. United States Army Corps of Engineers Dredging Standards.

D. United States Coast Guard Lighting Standards.

E. Michigan Department of Transportation (MDOT) Standard Specifications for Construction.

F. USACE Standards EM 1110-2-1003, Hydrographic Surveying.

1.3 DEFINITION

A. Hard material

1. Material requiring the use of special equipment for economical removal, including boulders or fragments too large to be removed in one piece by the dredge.

B. Maintenance Material

1. Shoaling which has occurred since the project areas were last dredged.

C. New Work Material

1. Previously un-dredged material.

1.4 SUBMITTALS

A. Dredging plan for use on this project must be submitted to the Contracting Officer for approval prior to beginning dredge operations. Dredging plan shall include:

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1. Authorized representative who is trained and approved for dredging work, and authorized to render decisions on behalf of the Contractor.

2. Equipment to be used (e.g., crane, clamshell, barge, tug, etc.).

3. Sequence of dredging operations.

4. Notice of Start of Dredging

5. Debris Management Plan

6. A site utilization plan with conceptual drawings showing proposed location of equipment, pipelines, staging areas and details of proposed temporary measures (ex., protect existing structures, protect wetlands, endangered species, etc.).

7. A spill contingency plan and water quality management plan that comply with requirements of the USACE Permit and with all Federal, State, and Local laws and regulations.

B. Dredge Disposal Placement Plan

1. Submit a Dredge Placement Plan to the Contracting Officer for approval prior to beginning dredge operations.

2. Include material, equipment, and methods for transporting, delivering, and placing dredge material. Include all required stormwater and erosion control measures.

3. Dredge disposal shall comply with requirements of the USACE and EGLE Permit and with all Federal, State, and Local laws and regulations.

4. Include Dredge Placement Safety Plan, describing in detail the means and methods to be utilized to provide public safety at placement area, all in accordance with the Accident Prevention Plan.

C. Bathymetric Survey Quality Control (QC) Plan shall be submitted to the Contracting Officer for approval prior to the start or preparation of any dredging activities. The QC plan shall include:

1. Survey equipment to be utilized, including survey vessel, echosounder, GPS equipment, and post-processing software.

2. Multibeam echosounders are to be utilized. Contractor shall submit the following information:

a. Swath angle

b. Swath direction

c. Points per swath

d. Ping Rate

3. Frequency of construction survey checks.

4. Qualification of bathymetric surveyor. A minimum of two years of bathymetric survey experience is required.

D. Test Reports

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1. Daily report of dredging operations

2. Sieve analysis test results

E. Existing site conditions including photographs and condition reports of:

1. Seawalls, docks, and mooring structures

2. Fenders

3. Dredge and disposal locations

4. Haul roads

5. Buoys

F. Schedule indicating Work sequence.

1. Coordinate the schedule to allow sufficient time for required testing, inspections, and installation of work of Related Sections.

2. Coordinate construction schedule to accommodate Contracting Officer’s on-site operations.

G. Closeout

1. Material Placement Records

1.5 UNIT PRICES

A. Dredging

1. Measurement and Payment

a. The total amount of material removed and to be paid for under the contract, will be measured by the Lump Sum. Cubic yards dredged will be measured in place for Quality Control purposes, by means of soundings taken before and after dredging.

Measurement of the number of cubic yards in place will be made by computing the difference in volume between the bottom surface shown by soundings of the last survey made before dredging, and the bottom surface shown by soundings of the first survey after dredging. All bathymetric survey and soundings to be performed by Contracting Officer’s Representative.

b. The volume for measurement will include the material within side slopes, less any deductions that may be required for misplaced material.

c. Incidental costs shall include but not be limited to (1) anticipate vessel traffic at and near the project area, (2) Environmental Protection Requirements (BMP’s), (3) development of dredge plan, (4) development of dredge disposal placement plan, (5) development of bathymetric survey QC plan, (6) development of dredging QC plan,

(7) protection of existing structures, (8) coordination & cooperation with other Contractors, and (10) furnishing all submittals.

d. Bathymetric surveys or soundings performed by the Contractor will not be considered or accepted for determining quantities of material dredged, payment, or final acceptance of project.

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e. Contractor shall acknowledge, in writing, that the Contracting Officer’s representative bathymetric survey equipment and process for determining quantity of material dredged for payment purposes is acceptable, prior to commencing dredge operations.

2. Variation in Estimated Quantity

a. If the quantity of a unit-priced item in this contract is an estimated quantity and the actual quantity of the unit-priced item varies more than 15 percent above or below the estimated quantity, an equitable adjustment in the contract price shall be made upon demand of either party. The equitable adjustment shall be based upon any increase or decrease in costs due solely to the variation above 115 percent or below 85 percent of the estimated quantity.

b. If the quantity variation is such as to cause an increase in the time necessary for completion, the Contractor may request, in writing, an extension of time, to be received by the Contracting Officer within 10 days from the beginning of the delay, or within such further period as may be granted by the Contracting Officer before the date of final settlement of the contract. Upon the receipt of a written request for an extension, the Contracting Officer shall ascertain the facts and make an adjustment for extending the completion date as, in the judgement of the Contracting Officer, is justified.

3. Excessive Dredging

a. Any excessive dredging material removed will be considered excessive dredging and will not be paid for. Materials taken from beyond the limits specified in sections “Side slopes,” will be excluded from the computed total amount dredged as excessive side slope dredging, and for which payment will not be made. The final determination of the amounts of excessive dredging will be based wholly on the surveys made for final examination and acceptance. See paragraph entitled “Final Examination and Acceptance.”

B. Mobilization and Demobilization

1. Contracting Office will pay all costs for Contractor’s mobilization and demobilization at the contract lump sum price for this item.

a. 50 percent of the lump sum price upon completion of the Contractor’s mobilization to the project site.

b. The remaining 50 percent upon completion of the demobilization.

2. The Contracting Officer may require the Contractor to furnish cost data to justify Mobilization and Demobilization bid item if the Contracting Officer believes that the line item for the Mobilization and Demobilization not bear a reasonable relation to the cost of the total contract (unbalanced bidding).

1.6 QUALITY CONTROLS

A. Use adequate numbers of skilled workmen under the supervision of a Project Manager who is experienced in the necessary crafts required for proper performance of the Work.

1. Project Manager shall be completely familiar with the specified requirements.

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2. Project Manager shall be authorized to render decisions on behalf of the Contractor.

B. Use equipment adequate in size, capacity, and number to accomplish the Work in a timely manner.

C. The Contractor shall establish and maintain a quality control system for dredging and placement operations to assure compliance with the Contract requirements and provide a Daily Report of Dredging Operations by completing the appropriate form and completing all inspections of items under this system, including, but not limited to, the following:

1. Layout of Work, and placement areas.

2. Proper dredging depths and placement heights.

3. Conveyance and placement operations.

4. Removal of misplaced material.

5. Safety requirements.

1.7 CHARACTER OF MATERIALS

A. Sediment sampling was performed at 14 locations near the proposed dredge area. Laboratory testing for contaminates and sieve analysis were performed on the samples. Results are included in the Appendices to these Specifications. Hydraulic dredging is not anticipated to be feasible given the gravel and cobble materials. Contractor shall plan to perform mechanical dredging.

1.8 CONTRACT COMPLIANCE

A. Side Slopes

1. Materials actually removed, within limits shown on the drawings, to provide for final side slopes not flatter than one vertical (1V) on two horizontal (2H), perpendicular to the dredge limit line, but not in excess of the amount originally lying above the side slope payment limit line will be calculated and paid for. The provisions of this section also apply to end slopes at the upstream and downstream dredging limits of the channel.

Dredging or side slopes utilizing “Box Cut” method will not be allowed.

B. Shoals

1. No shoaled material above the required pay prism line will be allowed for final acceptance.

C. Hydrographic Survey Equipment

1. Hydrographic surveys will be conducted to meet USACE accuracy standards defined in EM 1110-2-1003, Hydrographic Surveying.

2. Surveys will be performed by multiple vertical beam transducer sweep, or multibeam sweep methods. When utilizing multibeam technology, the operating acoustic frequency will range from 180 kHz to 250 kHz. All depth measurement devices, positioning, and motion compensation systems will be calibrated following the quality control procedures outlined in EM 1110-2-1003.

D. Volume Calculations

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1. The volume of material removed will be generated by using the TIN (Triangulated Irregular Network) computation, as outlined in the Hydrographic Surveying Manual EM 1110-2-1003, and subsequent changes/revisions issued by HQUSACE.

2. Multibeam survey technology will be used for the collection of survey data. The data will be post-processed into a 2 foot by 2 foot matrix using the average depth of all depths recorded in a cell will be generated from the edited multibeam data to perform the TIN volume computations, following the procedures outlined in EM 1110-2-1003. Any corresponding plotted plan view sounding sheets depicting representative depths over a dredging project will be generated using a cell size that is plot-scale dependent, utilizing a randomly selected sounding that is closest to cell center (shot depth) shifted to the center of the cell from the edited multi-beam data, as described in EM 1110-2-1003.

3. If the material to be dredged in the contract is categorized to be hard rock bottom or rock, the matrix used for the volume computations will be reduced to a 1 foot by 1 foot matrix and an average of the soundings in the cell will be used.

4. Shoal or strike plots depicting material above the required dredging grade will be generated using confirmed minimum depths in accordance with the data processing procedures outlined in EM 1110-2-1003.

5. All raw survey data and edited/processed binned data used for volume computations shall be available to the Contractor upon request.

E. Survey Time Constraints.

1. Plans and specifications surveys will be performed as close to the scheduled date as possible, fully considering the historical shoaling conditions of the project.

2. Pre dredging surveys shall be completed as close to the start of dredging as possible, but generally within two (2) weeks prior to commencement of work in the reach to be dredged.

3. Post Dredge and/or Final Acceptance surveys shall be completed as close to the end of dredging an acceptance section as possible, but generally within five (5) days after completion of work in the applicable acceptance section or channel reach.

F. Disposition of Survey Data.

1. Survey data shall be reduced, edited, and plotted as expeditiously as possible, generally within two (2) days after completion of the survey.

G. Environmental Protection Requirements

1. Provide and maintain during the life of the Contract, environmental protective measures.

Also, provide environmental protective measures required to correct conditions, such as oil spills or debris, that occur during the dredging operations. Comply with Federal, State, and Local regulations pertaining to water, air, and noise pollution.

PART 2 - PRODUCTS

2.0 NOT USED

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PART 3 - EXECUTION

3.1 EXAMINATION

A. Inspect the work, keep records of work performed, and ensure that gauges, targets, ranges, and other markers are in place and usable for the intended purpose. Furnish, at the request of the Contracting Officer’s Representative, boats, boatmen, laborers, and materials necessary for inspecting, supervising, and surveying the work. When required, provide transportation for the Contracting Officer’s Representative and inspectors to and from the disposal area and between the dredging plant and adjacent points on shore.

3.2 DREDGING

A. Fourteen (14) calendar days prior to any dredging work being performed the contractor shall provide written Notice of Start of Dredging to the Contracting Officer so that the Contracting Officer can schedule and perform prior soundings. The Contractor shall perform all dredging work to remove material to the required depths within the limits shown on the drawings as specified. Any materials in the allowable over-dredge depth prism and allowable side slopes are not required to be removed.

B. Rocks, cobbles (3 to 12 inches) and boulders (over 12 inch) may be encountered near breakwaters, revetments and pier heads shall not be removed if they are part of the harbor structures nor shall toe stones be undermined.

C. Indicated required dredging areas within required downstream and upstream dredging limits will be revised by the Contracting Officer, after obtaining the before (prior to) dredging soundings.

D. The Contractor shall perform all dredging and/or obstruction removal work to remove material to the required depths within the limits shown on the drawings and as specified.

E. The Contractor may be required to suspend dredging at any time when for any reason the gauges or ranges cannot be seen or properly followed.

F. During actual dredging operations, overflow from compartments of hopper dredges is not permitted. Overflow is prohibited from any floating plant that is in transit between the point of pick-up and the point of deposition of dredge materials in the disposal area.

G. Side casting of dredge materials is prohibited.

H. Contractor shall implement best management practices (BMPs) for environmental dredging.

BMPs shall be implemented to minimize suspended sediment during dredging operations. In the event of a conflict between BMPs and Laws and Regulations, the Contractor shall notify the Contracting Officer’s Representative in advance in writing and shall comply with Laws and Regulations. BMPs include, but are not limited to:

1. Barges shall be water-tight and inspected to confirm water-tightness prior to dredging operations and dredged material transport.

2. Utilize RTK GPS, or equivalent as determined by Contracting Officer, on the dredge head to make the operator aware of the location of the dredge head in relation to the top of sediment.

3. Dredge all sediment from within the dredge prism without excavating beyond the over-dredge limit.

Morris Rectangle

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4. Work on slopes proceeding from top of slope to toe of slope to maintain stable cut slopes.

5. No “sweeping” of the bottom to contour channel.

6. Use an experienced dredge operator that is capable of implementing BMPs to limit movement material which becomes suspended during removal.

7. Oil booms shall be available for emergency use.

I. BMPs related to mechanical dredging:

1. Use an appropriate bucket to limit resuspension caused by the dredge bucket going through the water column.

2. Minimizing overfill of dredge bucket.

3. Reduce the rate of bucket descent and retrieval.

4. Slow release of excess water at surface.

5. Perform single bites with the bucket; each bucket shall be brought to the surface and emptied between bites.

6. Using a wash bucket to rinse dredged material from the dredge bucket prior to lowering into the water, if other BMPs do not provide sufficient sediment control.

7. No bottom stockpiling.

8. Do not over-fill barges with dredged material.

3.3 INTERFERENCE WITH NAVIGATION

A. Minimize interference with the use of channels and passages. The Contracting Officer’s Representative will direct the shifting or moving of dredges or the interruption of dredging operations to accommodate the movement of vessels and floating equipment, if necessary.

3.4 LIGHTS

A. Each night, between sunset and sunrise and during periods of restricted visibility, provide lights for floating plants, pipelines, ranges, and markers. Also, provide lights for buoys that could endanger or obstruct navigation. When night work is in progress, maintain lights from sunset to sunrise for the observation of dredging operations. Lighting shall conform to United States Coast Guard requirements for visibility and color.

3.5 RANGES, GAUGES, AND LINES

A. Furnish, set, and maintain ranges, buoys, and markers needed to define the work and to facilitate inspection. Establish and maintain gauges in locations observable from each part of the work so that the depth may be determined. Suspend dredging when the gauges or ranges cannot be seen or followed.

3.6 SAFETY OF STRUCTURES

A. The prosecution of work shall ensure the stability of piers, bulkheads, and other structures that are to remain and are lying on or adjacent to the site of the work, insofar as structures may be jeopardized by dredging operations. Contractor shall repair damage resulting from dredging operations.

3.7 PLANT

Morris Rectangle

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A. Maintain the plant, scows, barges, and associated equipment to meet the requirements of the work. Remove dredged material placed due to leaks and breaks.

3.8 NOISE CONTROL

A. All equipment and dredge barges, boats, and tugs used on this work shall be equipped with satisfactory mufflers or other noise abatement devices. The Contractor shall conduct his operations to comply with all Federal, State, and Local laws pertaining to noise. The use of horns and whistle signals shall be held to the minimum necessary to conduct as quiet an operation as possible.

3.9 METHOD OF PLACEMENT

A. The method employed by the Contractor to convey dredged materials to a disposal area shall be as approved by the Contracting Officer’s Representative at all times. Temporary dumping or placement of materials outside of the pre-approved disposal area for subsequent re-handling into the disposal area is prohibited.

B. Transfer Site

1. If use of a Contractor-furnished placement site entails use of a transfer site, or if a Contracting Officer provided transfer site is specified, the Contractor shall sounding across the full width and length of the transfer site mooring area prior to the start-up and immediately after the completion of transfer operations under this contract. Contractor shall refer to CONTRACT COMPLIANCE section for equipment & post-processing requirements for soundings.

C. Vehicle Conveyance

1. Vehicles used to transport dredged materials to a disposal area shall have leak tight cargo bodies or compartments with spill and splash preventing devices as well as necessary sidewall height.

2. Vehicles shall not be loaded over their capacity, nor shall any loads exceed the limits of the thoroughfare over which the vehicles are operated. If the dredged materials are transferred from vessels to vehicles by bucket type equipment or any device which may leak or spill, provisions shall be made to prevent water and materials from escaping into the waterways.

3. Contractor shall ensure that materials that are splashed around vehicles during loading or unloading operations are…