Red_Brook_Addendum1_260320_Final.pdf

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Century Bog – Red Brook Restoration Project Addendum 1

March 20, 2026

NOTICE is hereby given to prospective Bidders of the following information, clarifications, and modifications to the Bidding Documents. The Bidding Documents remain unchanged except for modifications specifically indicated under Modifications.

Bidders must acknowledge receipt of this Addendum in the Bid Form and comply with the requirements for submission of Bids as set forth in the Bidding Documents.

CLARIFICATIONS

NOTICE is hereby given that the following clarifications and responses to questions from the Site Walk are provided.

1. Bidders may visit the Wildlife Management Area at any time during public hours to view site conditions without the snow cover.

2. The sign-in sheet from the Mandatory Site Walk on March 6, 2026, is attached.

3. Work is subject to an Archaeological Site Avoidance and Protection Plan (ASAPP), currently pending approval by the Massachusetts Historical Commission.

• The plan conceptually includes temporary protective fencing and signage northwest of Cell 2.

• The Contractor is responsible for providing all ASAPP-required materials and attending up to one hour of crew training.

• Payment for ASAPP compliance, including removal and disposal of measures, shall be included in Bid Item 1 (Mobilization and Demobilization).

4. MassWildlife is tax exempt and will provide the necessary certification to the selected

Contractor.

5. Project Partners have provided a list of local nurseries for Bidder’s consideration. The list is attached. Plants sourced from these or other vendors selected by the Contractor shall be subject to review under the selected Contractor’s submittals.

6. A Turtle Identification and Protocol Fact Sheet is attached. The fact sheet is supplemental to the Turtle Protection Plan outlined in Specification Section 01 35 13 Special Conditions. MassWildlife will conduct a turtle survey in the work area around mid-April. Based on that survey, MassWildlife with partners will plan to do a targeted sweep of turtle hotspots immediately prior to construction in those hotspot areas and move the turtles to the proposed “turtle protection zone”, which shall be established early in the construction phase and remain for the duration of the project. Contractors will participate in a maximum one hour training at the start of construction and will

2/7 then be responsible for moving turtles encountered out of harm’s way in accordance with the protocol.

7. The Experimental Plots Summary and Map prepared by Project Partners are attached.

Bidders are advised that the work associated with selective clearing, earthwork, bog surface treatment (including microtopography or other roughening), demolition, bog surface slash, and planting shall be captured in the relevant base bid items as described in Specification Section 01 22 00 Measurement and Payment.

8. Existing Conditions Site Monitoring photos and location plan are attached.

9. Bidders are advised that the fishway operations at White Island Pond typically occurs between April through June. During this time flow from White Island Pond is primarily conveyed through the bogs by the Temporary Herring Channel on the south side of the site as referenced on the plans. After the spring migratory period, the outlet of White Island Pond is closed to prevent warm water from the impoundment from compromising the cold groundwater inputs to the bogs under base flow conditions.

The outlet typically remains closed until the fall migratory period in November.

MassWildlife is responsible for operating the fishway. The White Island Pond Dam does have a fixed crest overflow spillway that may convey flow during significant flood events.

10. Bid Item 2 Selective Clearing involves removal of all trees and shrubs from the bog surface and within the project area, with the exception of trees greater than 3 inches in diameter at breast height and selective trees and shrubs flagged for protection within all cells except for Cell 1. Selective clearing within Cell 1 shall consist of clearing trees and shrubs less than 3 inches in diameter at breast height to facilitate access to and along the stream channel. Refer to the description herein regarding the removal of found irrigation pipes and which shall be considered incidental to this bid item. The access corridor shall be coordinated with the Engineer/Owner’s Representative prior to access. Bidders should assume that grubbing of relic cranberry plants or other existing ground cover is not part of the proposed work.

11. MassWildlife is implementing a fire break project in the Wildlife Management Area south of Century Bog. The fire break project is expected to produce large wood pieces including Logs and Logs with Rootwads that will be stockpiled within the sand pit area located south of Cells 6 and 7, west of Cell B. Installation of the owner furnished Logs and Logs with Rootwads shall be paid under Bid Items Alt 2 and 3. The Fire Break Contractor will be responsible for stacking large wood materials. In addition to Logs and Logs With Rootwads, the Fire Break Contractor will stockpile tree tops with branches from the fire break project, for use as slash on the stream channel or on the bog surface. The trees shall be felled before April 15, but may be moved by the Fire Break Contractor after that date.

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12. Will the barn or the house be available for field office use by the contractor? The barn can be available for use, but there is no electricity or bathroom. Also, MassWildlife will continue to need access to the barn, which will continue to house field equipment.

13. Please clarify or quantify the level of effort, quantity, and payment of the removal and disposal of the irrigation pipes. Bidders are advised of the following clarification relative to the anticipated level of effort and payment for the buried irrigation piping present onsite:

a. Please see the attached revised Specification Section 01 22 00 Measurement and Payment and Bid Form.

b. Removal of found irrigation pipes, to the extent practical, includes removing or pulling found irrigation pipes from the ground without “chasing” the buried pipe. We do not anticipate additional excavation for the sole purpose of removing buried irrigation pipes. Contractors should assume that mapping or exploration for the identification and removal of buried irrigation pipes is not required. If a portion of the pipe remains buried and cannot be removed without the need for additional excavation beyond what is required to perform the base contract Earthwork, Selective Clearing, and General Demolition, the end of the pipe shall be buried in place.

c. Disregard references to “capping” relic irrigation pipes. Open ends of relic irrigation pipes that will remain in place shall be buried.

d. Offsite disposal of found and removed irrigation pipes shall be paid under a unit price bid item.

e. Offsite disposal of invasive plant waste, found and removed plastic irrigation pipes, and general demolition debris are captured as separate unit price bid items and are expected to be segregated, subject to the Contractor’s selected means and methods, and reviewed by the Engineer prior to disposal. Contractors that opt not to segregate these waste categories for disposal shall be paid at the lowest contract unit bid price of the intermixed waste types.

14. Is the payment for FES square feet or linear feet? Measurement and payment for Fabric Encapsulated Soil (FES) is by the linear foot of FES lift, also known as “face feet”, installed and accepted. The revised Specification 01 22 00 Measurement and Payment and Bid Form are attached.

15. Please clarify how the alternate bid should incorporate additional or deducted bid items? The Total Alternate Bid shall equal the Total Base Bid minus Bid Items 4, 10, 11, 23, and 25 plus Alternate Bid Items Alt 1 through Alt 6. Please see the attached revised bid form.

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16. Clarify the intended source for the sand cap, Is the sand cap an imported material? Bidders are advised that the amount of clean sand onsite available for use as a clean cap in the proposed sandplain grassland zone is unknown. If there is insufficient sand generated from the work to meet the criteria noted on the disposal areas on the Construction Plans, the Contractor shall take reasonable precautions to segregate and avoid compromising sand encountered onsite with the lowest organic fractions (based on visual assessment) for prioritization as capping material at the proposed sandplain grassland. We anticipate that clean sand will not be imported onsite, nor will clean sand be over excavated outside of the sand removal areas depicted on the plans for the sole purpose of reclaiming sand capping material. We do not anticipate importing soil, except for selected streambed aggregates or granular fill if required for the culvert removal (Bid Item Alt 5). We do not anticipate the need to export material from the site.

17. Where are Logs and Logs with Rootwads intended to be sourced from considering the time of year tree clearing restrictions and the size of the pines onsite?

Perspective bidders are expected to identify sources and import suitable Logs and Logs with Rootwads for Contractor provided large wood materials installed under the Bid Items 10 and 11.

18. How much slash will be generated from the fire break project? The total volume of slash, consisting of tree tops from the MassWildlife’s fire break project on the Wildlife Management Area, is unknown at this time. The payment for the slash placement along the proposed stream channel associated with Logs and Logs with Rootwads are incidental to the large wood installed along the stream and captured under the Bid Items 10, 11, Alt 2, and Alt 3. Slash installed on the bog surface for wetland complexity are captured under Bid Item Number 13.

19. Can Invasive plants be buried onsite? MassWildlife implemented invasive plant removal in late summer/fall 2025 throughout the project area except for Cell 1. Any additional invasive plants encountered during construction should be flagged, removed, and disposed offsite. Additionally, Miscanthus sinensis (Chinese silvergrass) should be added to the invasive species list in the bid document for management during and post-construction. We have inquired with the Conservation Commission whether invasive plant waste is permitted to be buried on site and their response is pending. If the Conservation Commission approves the request, Contractors should assume that waste will be chipped and buried a minimum of 6 feet below final grade and subject to the mitigation under the Contractor’s 3 year monitoring period. The Conservation Commission may impose additional restrictions.

Disposal of invasive plant species, whether disposed on or offsite, shall comply with local, state, and federal regulations.

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20. Please clarify the end date for the project. Substantial completion is 240 days after Notice to Proceed. All work must be completed by March 31, 2027, when grant funding expires.

21. Who is responsible for locating and stockpiling sphagnum moss and where it is located? Sphagnum moss for transplant will be reclaimed from the site by the Contractor. Sphagnum moss is present in the lateral, perimeter and central ditches in variable densities. Project Partners will try to map potential sources of Sphagnum moss for reclamation from within the site.

MODIFICATIONS

NOTICE is hereby given that the Bidding Documents have been modified as follows.

1. Add the following additional insureds to Special Provisions for Century Bog Restoration Project, Insurance Section (p 1-13):

Buzzards Bay Coalition 114 Front St New Bedford, MA 02740

2. The following sections are reissued herewith in their entirety, have an Issue Date of March 20, 2026, contain(s) reference to “ADDENDUM NO. 1” in the footer, and text changes identified by underline for additions and strikeout for deletions.

Reissued Sections (with text changes shown) Bid Form Section 01 22 00 Measurement and Payment

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3. 32 90 00 Site Plantings: Replace the table in Section 2.1.A.3 with the following table specifying the proposed Sandplain Grassland seed mix.

Species (Latin, common)

Percent of Mix (%) Bulk Qty

(PLS Lb. Bulk)

Schizachyrium scoparium, Little Bluestem

54 0.33

Elymus virginicus, Virginia wild rye

15 0.32

Elymus canadensis, Canada wild rye

14 0.19

Sorghastrum nutans, Indian grass

9 0.08

Andropogon gerardii, Big bluestem

7 0.08

Juncus tenuis, Path rush 1 0.01

4. 32 90 00 Site Plantings: Replace the table in Section 2.1.A.4 with the following table specifying the proposed Grass/Forbs seed mix:

Species (Latin, common) Percent of Mix (%) Bulk Qty

(PLS Lb. Bulk)

Schizachyrium scoparium, Little bluestem 30 0.276

Eragrostis spectabilis, Purple love grass

8 0.004

Solidago juncea, Early goldenrod

8 0.013

Solidago nemoralis, Gray goldenrod

8 0.018

Euthamia graminifolia, Grassleaf goldenrod

8 0.003

Sporobolus cryptandrus, Sand dropseed

8 0.003

Asclepias tuberosa, Butterfly milkweed

4 0.127

Asclepias syriaca, Common milkweed

4 0.127

Baptisia tinctoria, Yellow wild indigo

4 0.403

Aster laevis (Symphyotrichum laeve), Smooth blue aster

4 0.009

Aster novi-belgii

(Symphyotrichum novi-belgii), New York aster

4 0.013

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Aster pilosus

(Symphyotrichum pilosum), Heath (Hairy) aster

4 0.004

Achillea millefolium, Common yarrow

3 0.002

Juncus tenuis, Path rush 3 0.0002

5. 32 90 00 Site Plantings Section 2.1.A.: Insert. paragraph 11 as follows:

“Seed materials must be native ecotypes, originate from local or regional sources no more than 100 miles from the project, at sites having the same or similar environmental conditions as the site of planting, unless approved by the Engineer.”

6. 32 90 00 Site Plantings Section 2.1.C.: Replace paragraph 2 with the following:

“Plant materials must be native ecotypes, originate from local or regional sources no more than 100 miles from the project, at sites having the same or similar environmental conditions as the site of planting, unless approved by the Engineer.”

This Addendum and items listed above are provided to Bidders in Portable Document Format (PDF) posted on CommBuys as indicated in the Invitation to Bid. It is each Bidder’s responsibility to check the website for Addenda per the Instructions to Bidders.

EJCDC® C-410, Bid Form for Construction Contracts.

Copyright © 2013 National Society of Professional Engineers, American Council of Engineering Companies, and American Society of Civil Engineers. All rights reserved. Page 1

PROJECT IDENTIFICATION: Red Brook – Century Bog Restoration Project

Proposal (Bid Schedule)

1.01 Bidder will complete the Work in accordance with the Contract Documents for the following price(s):

BASE BID________________________________________________________ ($__________________)

(Words) (Figures)

Note: Award will be based on the Total Base Bid.

Alternate Bid = Base Bid deduct Bid Items 4, 10, 11, 23, and 25 add Alternate Bid Items Alt 1 through Alt

6.

TOTAL ALTERNATE BID_____________________________________________ ($__________________)

(Words) (Figures)

BASE BID SCHEDULE

Item

No.

Description Unit

Estimated

Quantity

Bid Unit

Price (Figure)

Total Estimated

Bid Price

1 Mobilization & Demobilization LS 1

2 Selective Clearing LS 1

Demolition and Disposal

General

LSTON 112

4 Culvert Backfill LS 1

Erosion, Pollution and Water

Control

LS 1

Earthwork

(Ditches/Uplands/Berms)

CY 21,400

7 Earthwork (Channel Excavation) CY 18,200

8 Earthwork (Sand Removal) CY 8,300

9 Microtopography DAY 25

Logs (Owner furnished, Contractor installed)

EA 413

Rootwads (Owner furnished, Contractor installed)

EA 576

12 Salvaged Saplings EA 70

13 Slash Day 16

Copyright © 2013 National Society of Professional Engineers, American Council of Engineering Companies, and American Society of Civil Engineers. All rights reserved. Page 2

Item

No.

Description Unit

Estimated

Quantity

Bid Unit

Price (Figure)

Total Estimated

Bid Price

14 Riffle Aggregate TON 600

Fabric Encapsulated Soil (FES)

Lifts

LF 2,2001,000

Sphagnum Moss Salvage and

Transplant

AC 0.7

17 Transitional Seeding AC 7.6

18 Sandplain Grassland Seeding AC 4.0

19 Grass/Forbs Seeding AC 1.0

20 2-Gallon Container Trees EA 2,600

21 1-Gallon Container Shrubs EA 1,650

22 Swing Gates EA 3

23 Timber Stoplogs EA 8

24 Disposal – Irrigation Pipes TON 4

25 Disposal – Invasive Plant Waste TON 2

ALTERNATE BID SCHEDULE

Item

No.

Description Unit

Estimated

Quantity

Bid Unit

Price (Figure)

Total Estimated

Bid Price

Alt 1 Earthwork (Sand Removal Area in Cell 4 and 5)

CY 4,800

Alt 2 Logs (Contractor Provided) EA 413

Alt 3 Rootwads (Contractor

Provided)

EA 576

Alt 4 Shiplap 2x6 Stoplogs EA 8

Alt 5 Culvert Removal and Backfill LS 1

Alt 6 Onsite Disposal – Invasive Plant

Waste

CY 5

Copyright © 2013 National Society of Professional Engineers, American Council of Engineering Companies, and American Society of Civil Engineers. All rights reserved. Page 2

Bidder acknowledges that (1) each Bid Unit Price includes an amount considered by Bidder to be adequate to cover Contractor’s overhead and profit for each separately identified item, and (2) estimated quantities are not guaranteed, and are solely for the purpose of comparison of Bids, and final payment for all unit price Bid items will be based on actual quantities, determined as provided in the Contract Documents.

Red Brook – Century Bog Restoration Project February 2026 (Revised March 20 2026) Addendum 1

Addendum 1 MEASUREMENT AND PAYMENT Revised: March 2026 01 22 00 – 1 of 16

SECTION 01 22 00

MEASUREMENT AND PAYMENT

PART 1 GENERAL

1.1 SUMMARY

A. This section describes the basis of measurement and payment for the contract items:

1. Mobilization & Demobilization

2. Selective Clearing

3. Demolition and Disposal - General

4. Culvert Backfill

5. Erosion, Pollution and Water Control

6. Earthwork (Ditches/Uplands/Berms)

7. Earthwork (Channel Excavation)

8. Earthwork (Sand removal)

9. Microtopography

10. Logs and Vertical Piles (Owner furnished, Contractor installed)

11. Logs with Rootwads (Owner furnished, Contractor installed)

12. Salvaged Saplings

13. Slash

14. Riffle Aggregate

15. Fabric Encapsulated Soil Lifts

16. Sphagnum Moss Salvage and Transplant

17. Transitional Zone Seeding

18. Sandplain Grassland Zone Seeding

19. Grass/Forbs Zone Seeding

Addendum 1

Addendum 1 MEASUREMENT AND PAYMENT Revised: March 2026 01 22 00 – 2 of 16

20. 2-Gallon Trees

21. 1-Gallon Shrubs

22. Swing Gates

23. Timber Stop Logs

24. Disposal – Irrigation Pipes

24.25. Offsite Disposal – Invasive Plant Waste

25.26. Alt 1 - Earthwork (Sand Removal Area in Cell 4 and 5)

26.27. Alt 2 - Logs and Vertical Piles (Contractor provided)

27.28. Alt 3 - Logs with Rootwads (Contractor provided)

29. Alt 4 - Shiplap 2x6 Stoplogs

30. Alt 5 – Culvert Removal an Backfill

28.31. Alt 6 - Onsite Disposal – Invasive Plant Waste

B. The bid price for each item of the contract shall cover all work shown on the

Drawings and required by these Specifications and other contract documents. All costs in connection with the Work, including furnishing all materials, equipment and supplies; providing all construction, plants, equipment and tools, and performing all necessary labor and supervision to fully complete the Work, shall be included in the lump sum and unit prices bid. All work not specifically set forth as a pay item in the Construction Contract shall be considered as a subsidiary obligation of the Contractor and all costs in connection therewith shall be included in the prices bid.

C. All estimated quantities provided in the Construction Contract are to give the

Bidder an estimate of the effort required to fulfill the Contract. Owner does not represent that the listed description of lump sum pay items is either comprehensive or unique. The Contractor shall be responsible to make independent quantity estimates to determine the actual quantities necessary to construct the project as shown in the Drawings and described in the

Specifications. The Contractor agrees not to make any claim for damages, anticipated profits or otherwise on account of any difference between the amount of work actually performed and materials actually furnished and the estimated amounts herein except as allowed in Section II Information to Bidders/General

Conditions.

Addendum 1

Addendum 1 MEASUREMENT AND PAYMENT Revised: March 2026 01 22 00 – 3 of 16

D. Unit prices include all necessary material, plus cost for delivery, installation, insurance, applicable taxes, overhead, and profit.

E. Engineer reserves the right to reject Contractor's measurement of work-in-place that involves use of established unit prices and to have this work measured, at

Owner's expense, by an independent surveyor acceptable to Contractor.

PART 2 PRODUCTS (NOT USED)

PART 3 EXECUTION

3.1 MEASUREMENT AND PAYMENT ITEMS

A. Base Bid Items

1. Mobilization & Demobilization. This item includes all preparatory work and operations necessary for the movement of personnel, equipment, supplies, and incidentals to the project site; for necessary permits, submittals, notifications and other documentation including permit signs;

establishment of all offices or other facilities necessary for work on the project, premiums on contract bonds and insurance for the Contract and for other work and operations that must be performed or costs incurred before beginning work on the project. This item also includes work and operations necessary to disband all mobilized items and clean up the site.

The removal of all temporary access ways, signs, temporary fencing, and temporary facilities or works and the restoration of surfaces to an equal or better than existing condition shall also be included. Mobilization &

Demobilization for subcontracted work is included. Access and Traffic

Control, access development, and any temporary crossings needed for construction access and movements, will be incidental to the Item

“Mobilization & Demobilization.”

a) Measurement. No measurement for this item will be made.

b) Payment. Payment for Mobilization & Demobilization will be made at the contract lump sum price of the Construction Contract, which shall be compensation in full for all labor, materials, equipment and other expenses necessary to complete the work as specified for this item.

2. Selective Clearing. This item includes all labor, equipment and materials associated with tree and brush clearing including but not limited to: all vegetative clearing required to complete the Work, including removing and stockpiling trees and shrubs from the work area as indicated for reuse as Large Wood and Slash, the clearing vegetation and debris from ditches as indicated, as well as removing and, treating, and disposing any additional invasive species prior to substantial construction completion

Addendum 1

Addendum 1 MEASUREMENT AND PAYMENT Revised: March 2026 01 22 00 – 4 of 16 from within the Limit of Disturbance as shown in the Drawings and any additional disturbed areas and as described in the Specifications. Removal, to the extent practical, of plastic irrigation pipes encountered during selective clearing shall be incidental to the Item “Selective Clearing”.

a) Measurement. No measurement for this item will be made.

b) Payment. Payment for Selective Clearing will be made at the contract lump sum price in the Construction Contract, which shall be compensation in full for all labor, materials, equipment and other expenses necessary to complete the work as specified for this item.

3. Demolition and Disposal - General. This item includes all labor, equipment and materials associated with the demolition and disposal of culverts, appurtenances, plastic surface drainage pipes/culverts, steel pipes/culverts, valves, and all other structures indicated for removal and disposal from the work area as shown in the Drawings and described in the Specifications. Removal, to the extent practical, of buried plastic irrigation pipes encountered during general demolition operations shall be incidental to this item. Disposal of found irrigation pipes removed during earthwork, selective clearing, general demolition, and microtopography operations shall be measured and paid under the Item “Disposal –

Irrigation Pipes”. Disposal of invasive plant debris shall be paid under

Item “Disposal – Invasive Plant Debris” or Alternate Bid Item Alt 6, if authorized.

a) Measurement. This item will be measured on the basis of per net ton of general demolition debris disposed offsite as measured by the receiving facility and documented on submitted weight tickets. No measurement for this item will be made.

b) Payment. Payment for Demolition and Disposal - General will be made at the contract lump sumunit price in the Construction Contract, which shall be compensation in full for all labor, materials, equipment and other expenses necessary to complete the work as specified for this item.

A copy of the weight tickets shall be provided to the Engineer.

4. Culvert Backfill. This item includes compensation in full for all labor, materials, equipment and other expenses necessary to backfill the culvert beneath the fire access drive at the south side of the site as depicted on the

Construction Plans and as specified for this Item, including installation and removal of temporary bulkheads or forms, site access, and fill materials.

a) Measurement. No measurement for this item will be made.

Addendum 1

Addendum 1 MEASUREMENT AND PAYMENT Revised: March 2026 01 22 00 – 5 of 16

b) Payment. Payment for Culvert Backfill will be made at the contract lump sum price in the Construction Contract, which shall be compensation in full for all labor, materials, equipment and other expenses necessary to complete the work as specified for this item.

5. Erosion, Pollution and Water Control. This item includes all labor, equipment and materials associated with Erosion, Pollution and Water

Control including but not limited to:to dewatering, stream diversion, silt fence, turbidity curtains, oil absorbing booms, bulk bags and other erosion control measures for control of water, erosion and pollution control, and other best management practices for erosion and pollution control necessary to complete the Work on the Project.

a) Measurement. No measurement for this item will be made.

b) Payment. Payment for Erosion, Pollution and Water Control will be made at the contract lump sum price in the Construction Contract, which shall be compensation in full for all labor, materials, equipment and other expenses necessary to complete the work as specified for this item.

6. Earthwork (Ditches/Uplands/Berms). This item includes compensation in full for all labor, materials, equipment and other expenses necessary to complete the work as specified for this Item, including stockpiling, sorting, transporting, management, placement, grading, and compaction of fill as indicated, and spoiling of excavated material in designated areas.

Removal, to the extent practical, of plastic irrigation pipes encountered during Earthwork shall be incidental to the Item “Earthwork (Ditches/Uplands/Berms)”.

a) Measurement. The estimated quantity for this item of work shall be the final pay quantity, unless the dimensions of any portion of the item are revised by the Resident Project Representative, or the item or any portion of the item is eliminated. If the dimensions of any portion of the item are revised, and the revisions result in the increase or decrease in the estimated quantity of work, the final pay quantity for the item will be revised in the amount represented by the changes in the dimensions, and the compensation for the item will be based on the revised quantity multiplied by the bid unit price for the item. The estimated quantity is based on comparison of existing and design AutoCAD digital terrain surfaces, and reflect in-place volumes.

b) Payment. Payment for Earthwork (Ditches/Uplands/Berms) will be made at the Contract price per cubic yard, which shall be compensation in full for all labor, materials, equipment, and other expenses necessary to complete the work as specified for this item.

Addendum 1

Addendum 1 MEASUREMENT AND PAYMENT Revised: March 2026 01 22 00 – 6 of 16

7. Earthwork (Channel Excavation). This item includes compensation in full for all labor, materials, equipment and other expenses necessary to complete the work as specified for this Item, including excavation, stockpiling, sorting, transporting, management and placement of excavated material as indicated, and spoiling of excavated material in designated areas. Removal, to the extent practical, of plastic irrigation pipes encountered during Earthwork shall be incidental to the Item

“Earthwork (Channel Excavation)”.

a) Measurement. The estimated quantity for this item of work shall be the final pay quantity, unless the dimensions of any portion of the item are revised by the Resident Project Representative, or the item or any portion of the item is eliminated. If the dimensions of any portion of the item are revised, and the revisions result in the increase or decrease in the estimated quantity of work, the final pay quantity for the item will be revised in the amount represented by the changes in the dimensions, and the compensation for the item will be based on the revised quantity multiplied by the bid unit price for the item. The estimated quantity is based on comparison of existing and design AutoCAD digital terrain surfaces, and reflect in-place volumes.

b) Payment. Payment for Earthwork (Channel Excavation) will be made at the Contract price per cubic yard, which shall be compensation in full for all labor, materials, equipment and other expenses necessary to complete the work as specified for this item.

8. Earthwork (Sand Removal). This item includes compensation in full for all labor, materials, equipment and other expenses necessary to complete the work as specified for this Item, including excavation, stockpiling, sorting, transporting, management and placement of fill as indicated, and spoiling of excavated material in designated areas. Removal, to the extent practical, of plastic irrigation pipes encountered during Earthwork shall be incidental to the Item “Earthwork (Sand Removal)”.

a) Measurement. The estimated quantity for this item of work shall be the final pay quantity, unless the dimensions of any portion of the item are revised by the Resident Project Representative, or the item or any portion of the item is eliminated. If the dimensions of any portion of the item are revised, and the revisions result in the increase or decrease in the estimated quantity of work, the final pay quantity for the item will be revised in the amount represented by the changes in the dimensions, and the compensation for the item will be based on the revised quantity multiplied by the bid unit price for the item. The estimated quantity is based on comparison of existing and design AutoCAD digital terrain surfaces, and reflect in-place volumes.

Addendum 1

Addendum 1 MEASUREMENT AND PAYMENT Revised: March 2026 01 22 00 – 7 of 16

b) Payment. Payment for Earthwork (Sand Removal) will be made at the Contract price per cubic yard, which shall be compensation in full for all labor, materials, equipment and other expenses necessary to complete the work as specified for this item.

9. Microtopography. This item includes compensation in full for all labor, materials, equipment and other expenses necessary to complete the Work as specified for this Item, including disturbing and turning over the existing bog surface 1 foot above and below (+/-) from the grades shown in the Drawings. Removal, to the extent practical, of plastic irrigation pipes encountered during Earthwork shall be incidental to the Item

“Microtopography”.

a) Measurement. Microtopography shall be measured by the number of 8-hour shifts completed by an excavator and operator with specific application to this work. Minimum capacity shall be Caterpillar 312 excavator or equivalent, or as otherwise reviewed and approved by the

Owner.

b) Payment. Payment for Microtopography will be made at the

Contract unit price per day, which shall be compensation in full for all labor, materials, equipment and other expenses necessary to complete the

Work as specified for this item.

10. Logs and Vertical Piles (Owner furnished, Contractor installed). This item includes compensation in full for all labor, materials, equipment, and other expenses necessary to complete the Work as indicated. This Item shall include installation, and management of Logs and Vertical Piles, stockpiled on the site as provided by the Owner. Installation shall be along the proposed stream in locations shown on the Drawings, and shall include transportation from the stockpile area for use in the Work, excavation, subgrade preparation, Log and Vertical Pile installation, complete and in place. Slash, placed with Logs along the stream shall be incidental to this bid item.

a) Measurement. This Item shall be measured on the basis of each piece of Logs and Vertical Piles installed in the work, complete and in place. Installation of slash associated with Logs and Vertical Piles shall be considered incidental to this Item. Reduction or increase in the quantity for this item will not be grounds for renegotiation of the base unit price for the

Item.

b) Payment. This item shall be paid at the Contract unit price per Log and Vertical Pile procured, installed, complete and in place, which shall be compensation in full for all labor, materials, equipment and other expenses necessary to complete the work as specified for this item. Reduction or

Addendum 1

Addendum 1 MEASUREMENT AND PAYMENT Revised: March 2026 01 22 00 – 8 of 16 increase in the quantity for this item will not be grounds for renegotiation of the base unit price for the Item.

11. Logs with Rootwads (Owner furnished, Contractor installed). This item includes compensation in full for all labor, materials, equipment, and other expenses necessary to complete the work as indicated. This Item shall include installation and management of Logs with Rootwads. Installation shall be along the proposed stream as shown on the drawings and shall include transportation from the stockpile area for use in the Work, excavation, subgrade preparation, placement, and backfill. Slash, placed with Logs and Rootwads along the stream shall be incidental to this bid item.

a) Measurement. This item shall be measured on unit price basis of each Log with Rootwad installed in the work, complete and in place.

Reduction or increase in the quantity for this item will not be grounds for renegotiation of the base unit price for the Item.

b) Payment. This item shall be paid at the Contract unit price per Log with Rootwad installed, complete and in place, which shall be compensation in full for all labor, materials, equipment and other expenses necessary to complete the Work as specified for this item. Reduction or increase in the quantity for this item will not be grounds for renegotiation of the base unit price for the Item.

12. Salvaged Saplings. This item includes compensation in full for all labor, materials, equipment and other expenses necessary to complete the Work as indicated. Installation shall be along the mainstem stream in locations shown on the Drawings. Slash, placed with Salvaged Saplings along the stream shall be incidental to this bid item.

a) Measurement. This item shall be measured on the basis of each

Salvaged Sapling installed in the work, complete and in place. Reduction or increase in the quantity for this item will not be grounds for renegotiation of the base unit price for the Item.

b) Payment. This item shall be paid at the Contract unit price per

Salvaged Sapling installed, complete and in place, which shall be compensation in full for all labor, materials, equipment, and other expenses necessary to complete the work as specified for this item.

Reduction or increase in the quantity for this item will not be grounds for renegotiation of the base unit price for the Item.

13. Slash. This item includes compensation in full for all labor, materials, equipment and other expenses necessary to complete the work as specified for this Item. Slash shall include installation of Owner-supplied Slash and

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Addendum 1 MEASUREMENT AND PAYMENT Revised: March 2026 01 22 00 – 9 of 16

Slash salvaged during Selective Clearing, dispersed across the site, in locations other than the mainstem or other locations shown on the

Drawings designated for large wood installation covered under separate

Items of Work. Slash must be staged in piles proximally to eventual location of installation prior to commencement of time keeping for this item. Installation shall include excavation, subgrade preparation, and installation of Slash on the bog surface, in tributaries and backwater channels, and along the edges of the ponds, complete and in place. Staging operations to distribute slash proximal to the installation locations shall be considered incidental to this Item.

a) Measurement. Slash shall be measured by the number of 8-hour shifts completed with an excavator and operator with specific application to this work. Minimum capacity shall be Caterpillar 312 excavator or equivalent with a thumb attachment, or as otherwise reviewed and accepted by the Engineer.

b) Payment. Payment for Slash will be made at the Contract unit price per day, which shall be compensation in full for all labor, materials, equipment and other expenses necessary to complete the Work as specified for this item.

14. Riffle Aggregate. This item includes all labor, equipment and materials for the furnishing and installation of Riffle Aggregate as shown on the

Drawings. Items incidental to Riffle Aggregate including excavating, hauling and disposal of native material removed to create subgrade dimensions. Minor adjustments or modifications to riffle substrate may be required after flow is activated; if required, this work would occur within

14 days from the date that flow is activated on the riffle substrate and shall be incidental to ‘Riffle Aggregate’.

a) Measurement. Riffle Aggregate shall be measured by the tons of channel bed material meeting the specified gradation installed in the

Work, complete and in place. The Contractor shall furnish the Engineer with weight tickets from state-certified scales for each load of channel bed material installed in the work.

b) Payment. Riffle Aggregate will be paid for at the Contract unit price per ton installed, which shall be compensation in full for all labor, materials, equipment and other expenses necessary to complete the work as specified for the Item.

15. Fabric Encapsulated Soil (FES) Lifts. This item includes all materials, equipment and labor to provide FES including but not limited to formwork, woven and non-woven coir fabrics, stakes, and seed. Required

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Addendum 1 MEASUREMENT AND PAYMENT Revised: March 2026 01 22 00 – 10 of 16 excavation shall be incidental to the unit price for FES installed under the bid item, Surface Fabric.

a) Measurement. Fabric Encapsulated Soil Lifts shall be measured on the basis of linear feet of FES lifts installed at the bank, complete and in place, also known as “face feet”.

b) Payment. Fabric Encapsulated Soil Lifts shall be paid at the

Contract unit price per linear foot of FES lift (also known as “face feet”) installed, complete and in place, which shall be compensation in full for all labor, materials, equipment and other expenses necessary to complete the Work as specified for this item.

16. Sphagnum Moss Salvage and Transplant. This item includes compensation in full for all labor, materials, equipment and other expenses necessary to complete the work as specified for this Item, Sphagnum Moss

Salvage and Transplant. Salvaging shall occur from the site prior to backfilling the ditches where sphagnum moss is established and transplanting shall be in locations shown on the Drawings, and shall include excavation of sphagnum moss, onsite management and materials transport, and placement of sphagnum moss.

a) Measurement. Sphagnum Moss Salvage and Transplant shall be measured per acre of sphagnum moss transplanted and placed in final locations as shown on the Drawings.

b) Payment. Payment for this Item will be made at the contract per acre price, which shall be compensation in full for all labor, equipment and other expenses necessary to complete the Work as specified for this item.

17. Transitional Seeding. This item includes all labor, watering, equipment, materials, maintenance and warranty associated with seeding in the

Transitional Zone. Cover crop and mulch shall be incidental to this Item.

a) Measurement. This Item will be measured per acre seeded as shown in the Drawings and Specifications. The Contractor shall submit invoices of seed materials purchased to demonstrate rates of seed application.

b) Payment. Payment for this Item will be made at the contract per acre price, which shall be compensation in full for all labor, materials, equipment and other expenses necessary to complete the work as specified for this item.

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Addendum 1 MEASUREMENT AND PAYMENT Revised: March 2026 01 22 00 – 11 of 16

18. Sandplain Grassland Seeding. This item includes all labor, watering, equipment, materials, maintenance and warranty associated with seeding in the Sandplain Grassland Zone. Cover crop and mulch shall be incidental to this Item.

a) Measurement. This Item will be measured per acre seeded as shown in the Drawings and Specifications. The Contractor shall submit invoices of seed materials purchased to demonstrate rates of seed application.

b) Payment. Payment for this Item will be made at the contract per acre price, which shall be compensation in full for all labor, materials, equipment and other expenses necessary to complete the work as specified for this item.

19. Grass/Forbs Seeding. This item includes all labor, watering, equipment, materials, maintenance and warranty associated with seeding in the

Grass/Forbs Zone. Cover crop and mulch shall be incidental to this Item.

a) Measurement. This Item will be measured per acre seeded as shown in the Drawings and Specifications. The Contractor shall submit invoices of seed materials purchased to demonstrate rates of seed application.

b) Payment. Payment for this Item will be made at the contract per acre price, which shall be compensation in full for all labor, materials, equipment and other expenses necessary to complete the work as specified for this item.

20. 2-Gallon Trees. This item includes, but is not necessarily limited to, furnishing plant material, site preparation, hole excavation, planting, stabilizing, irrigation, rodent protection, maintenance, and warranty as shown in the Drawings and described in the Specifications. This item includes supplying all materials, equipment, labor, tools and incidentals to complete this work and the required warranty performance associated with providing 2-Gallon Trees.

a) Measurement. This Item will be measured per each installed as shown in the planting areas on the Drawings and as specified.

b) Payment. Payment for this Item shall be per live installed plant at the contract unit price in the Construction Contract, which shall be compensation in full for all labor, materials, equipment, and other expenses necessary to complete the work as specified for this item.

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Addendum 1 MEASUREMENT AND PAYMENT Revised: March 2026 01 22 00 – 12 of 16

21. 1-Gallon Shrubs. This item includes, but is not necessarily limited to, furnishing plant material, site preparation, hole excavation, planting, stabilizing, irrigation, rodent protection, maintenance, and warranty as shown in the Drawings and described in the Specifications. This item includes supplying all materials, equipment, labor, tools and incidentals to complete this work and the required warranty performance associated with providing 1-Gallon Shrubs.

a) Measurement. This Item will be measured per each installed as shown in the planting areas on the Drawings and as specified.

b) Payment. Payment for this Item shall be per live installed plant at the contract unit price in the Construction Contract, which shall be compensation in full for all labor, materials, equipment, and other expenses necessary to complete the work as specified for this item.

22. Swing Gates. This item includes compensation in full for all labor, materials, equipment, and other expenses necessary to complete the Work as specified for this item, including all clearing, excavation and construction of foundations, procurement, transportation, and materials associated with the installation of the single arm swing gates depicted on the Construction Plans. Boulders placed on either side of the gate shall be salvaged from the site. Installation of the boulders shall be incidental to this bid item.

a) Measurement. This Item will be measured based on the number of units installed and accepted.

b) Payment. Payment for this Item will be made at the Contract unit price per gate installed, which shall be compensation in full for all labor, materials, equipment and other expenses necessary to complete the Work as specified for this item.

23. Stop Logs. This item includes compensation in full for all labor, materials, equipment, and other expenses necessary to complete the Work as specified for this item, including all shop drawing preparation, fabrication, testing, and installation of the stop logs at the Bartlett Pond

Water Control Structure. The locking device and lifting device are incidental to this Bid Item.

a) Measurement. This Item will be measured based on the number of

6 inch high stop logs installed and accepted.

b) Payment. Payment for this Item will be made at the Contract unit price per stop log installed, which shall be compensation in full for all

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Addendum 1 MEASUREMENT AND PAYMENT Revised: March 2026 01 22 00 – 13 of 16 labor, materials, equipment and other expenses necessary to complete the

Work as specified for this item.

24. Disposal – Irrigation Pipes. This item includes all labor, equipment and materials associated with the disposal of Irrigation Pipes as shown in the

Drawings and described in the Specifications.

a) Measurement. This item will be measured on the basis of per net ton of irrigation pipe debris disposed offsite as measured by the receiving facility and documented on submitted weight tickets.

b) Payment. Payment for this item will be made at the unit price in the Construction Contract, which shall be compensation in full for all labor, materials, equipment and other expenses necessary to complete the work as specified for this item. A copy of the weight tickets shall be provided to the Engineer.

25. Disposal – Invasive Plant Waste. This item includes all labor, equipment and materials associated with the offsite disposal of Invasive Plant Waste from the work area as shown in the Drawings and described in the

Specifications. Removal and treatment of invasive plants from the bog is captured under Bid Item “Selective Clearing”.

a) Measurement. This item will be measured on the basis of net ton of invasive plant waste disposed offsite as measured by the receiving facility and documented on submitted weight tickets.

b) Payment. Payment for this item will be made at the unit price in the Construction Contract, which shall be compensation in full for all labor, materials, equipment and other expenses necessary to complete the work as specified for this item. A copy of the weight tickets shall be provided to the Engineer.

B. Alternate Bid Items

Alt 1 Earthwork (Sand Removal Area in Cell 4 and 5). This item includes compensation in full for all labor, materials, equipment and other expenses necessary to complete the work as specified for this Item, including excavation, stockpiling, sorting, transporting, management and placement of fill as indicated, and spoiling of excavated material in designated areas.

Removal, to the extent practical, of plastic irrigation pipes encountered during Earthwork shall be incidental to the Item “Earthwork (Sand

Removal Area in Cell 4 and 5)”.

a) Measurement. The estimated quantity for this item of work shall be the final pay quantity, unless the dimensions of any portion of the item are

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Addendum 1 MEASUREMENT AND PAYMENT Revised: March 2026 01 22 00 – 14 of 16 revised by the Resident Project Representative, or the item or any portion of the item is eliminated. If the dimensions of any portion of the item are revised, and the revisions result in the increase or decrease in the estimated quantity of work, the final pay quantity for the item will be revised in the amount represented by the changes in the dimensions, and the compensation for the item will be based on the revised quantity multiplied by the bid unit price for the item. The estimated quantity is based on comparison of existing and design AutoCAD digital terrain surfaces, and reflect in-place volumes.

b) Payment. Payment for Earthwork (Sand Removal Area in Cell 4 and 5) will be made at the Contract price per cubic yard, which shall be compensation in full for all labor, materials, equipment and other expenses necessary to complete the work as specified for this item.

Alt 2 Logs and Vertical Piles (Contractor Provided). This item includes compensation in full for all labor, materials, equipment, and other expenses necessary to complete the Work as indicated. This Item shall include procurement, transportation, installation, and management of Logs and Vertical Piles, stockpiled on the site. Installation shall be along the stream in locations shown on the Drawings, and shall include procurement and delivery, transportation from the stockpile area for use in the Work, excavation, subgrade preparation, Log and Vertical Timber Pile installation, complete and in place. Slash, placed with Logs along the stream shall be incidental to this bid item.

a) Measurement. This item shall be measured on unit price basis of each Log and Vertical Pile procured and installed in the work, complete and in place. Reduction or increase in the quantity for this item will not be grounds for renegotiation of the base unit price for the Item.

b) Payment. This item shall be paid at the Contract unit price per Log and Vertical Timber Pile procured, installed,…