WCHC26_AMD0004_Technical Section.pdf

West Coast Hopper Contract 2026

PROJECT TABLE OF CONTENTS

DIVISION 01 - GENERAL REQUIREMENTS

01 10 00.00 82 CONTRACT ADMINISTRATION DATA (DREDGING)

01 10 10.00 82 CONTRACTOR'S OPERATIONS AND REQUIREMENTS (DREDGING)

01 11 00.42 82 SUMMARY OF WORK - EAST SAND ISLAND

01 22 00.00 82 MEASUREMENT AND PAYMENT

01 35 26.00 82 GOVERNMENTAL SAFETY REQUIREMENTS

01 42 00 SOURCES FOR REFERENCE PUBLICATIONS

01 45 00.00 82 QUALITY CONTROL (DREDGING)

01 45 00.15 25 RESIDENT MANAGEMENT SYSTEM CONTRACTOR MODE (RMS CM)

01 57 20.00 82 ENVIRONMENTAL PROTECTION (DREDGING)

DIVISION 32 - EXTERIOR IMPROVEMENTS

32 90 00.00 25 SITE RESTORATION FOR EAST SAND ISLAND

DIVISION 35 - WATERWAY AND MARINE CONSTRUCTION

35 20 23.00 82 DREDGING AND CHANNEL CLEARING

35 20 23.03 82 MECHANICAL ULLAGE SENSORS

35 20 23.10 82 PUMP-ASHORE OPERATIONS FOR BEACH FILL

35 20 23.23 82 NATIONAL DREDGING QUALITY MANAGEMENT PROGRAM HOPPER DREDGE

35 24 13.11 82 TRAILING SUCTION DREDGING

-- End of Project Table of Contents --

DOCUMENT PROJECT Page 1

AMD #0004

SECTION TABLE OF CONTENTS

DIVISION 01 - GENERAL REQUIREMENTS

SECTION 01 22 00.00 82

MEASUREMENT AND PAYMENT

PART 1 GENERAL

1.1 REFERENCES

1.2 GENERAL INFORMATION

1.3 UNIT PRICE PAYMENT ITEMS

1.4 JOB PAYMENT ITEMS

PART 2 PRODUCTS

PART 3 EXECUTION

3.1 MEASUREMENT AND PAYMENT

3.1.1 Mobilization and Demobilization, CLIN 0001

3.1.2 HUM, Bin Measure to Required Depth, HOODS Ocean Placement, Base and option Line Items, CLINs 0002 and 0003

3.1.3 LCR, RM 7+00 to RM 17+20, Bin Measure, Flow Lane (FL) and

Transfer Site (TS) Placement, Base Line Item, CLIN 0004

3.1.4 LCR, RM 3+00+00 to RM 105+00+00, Pre/Post Dredge Survey, FL and TS Placement, Base and option Line Items, CLINs 0005, 0006, and 0007

3.1.5 LCR, RM 3+00+00 to RM 105+00+00, Bin Measure to Required Depth, FL and TS Placement, Base Line Item, CLIN 0008

3.1.6 LCR, RM 7+00 to RM 17+20, Increment for Columbia River Deep Water Site (DWS) Placement, option Line Item, CLIN 0009

3.1.7 LCR, Increment Transit Miles for Material Placement Site (between zero and eight miles one-way), CLIN 0010

3.1.8 LCR Increment Transit Miles for Material Placement Site (greater than eight miles one-way), CLIN 0011

3.1.9 LCR, Intra-Project Transit Miles, Base Line Item, CLIN 0012

3.1.10 COO, Incremental Mobilization and Demobilization, option Line

Item, CLIN 0013

3.1.11 COO, Bin Measure to Required Depth, Site-F Ocean Placement, option Line Item, CLIN 0014

3.1.12 MCR, Bin Measure, Shallow Water Site (SWS) or North Jetty

Site (NJS) Placement, Base and option Line Items, CLINs 0015, and

3.1.13 MCR, Bin Measure, Increment for Operations and Maintenance Deep Water Site (DWS) Placement, Base and option Line Items, CLINs 0017, 0018, and 0019

3.1.14 MCR, Bin Measure, Increment for Operations and Maintenance South Jetty Site (SJS) Placement, option Line Item, CLIN 0020

3.1.15 HUM, Third Party Hydrographic Survey, option Line Item, CLIN

3.1.16 LCR, Third Party Hydrographic Survey, option Line Item, CLIN

SECTION 01 22 00.00 82 Page 1

3.1.17 MCR, Third Party Hydrographic Survey, option Line Item, CLIN

3.1.18 COO, Third Party Hydrographic Survey, option Line Item, CLIN

3.1.19 East Sand Island (ESI), Incremental Mobilization and

Demobilization for Pump-ashore Operations, option Line Item, CLIN

3.1.20 ESI, Pre/Post Survey, Increment for Shoreline Placement, Optional Line Items, CLIN 0026 and CLIN 0027

3.1.21 ESI, Topographic/UAS Survey Package, Optional Line Items, CLIN 0028

3.1.22 ESI, Vegetation, Optional Line Item, CLIN 0029

3.1.23 ESI, Avian Dissuasion Mounding, Optional Line Item, CLIN 0030

3.2 PAYMENT METHOD

3.2.1 Bin Measure Areas

3.2.2 Bin Measure to Required Depth Areas

3.2.3 Pre/Post Dredge Survey

3.2.4 Beach Pre/Post Placement Survey

3.3 SURVEYS

3.3.1 Government Surveys

3.3.2 Third Party Hydrographic Surveys

-- End of Section Table of Contents --

SECTION 01 22 00.00 82 Page 2

SECTION 01 22 00.00 82

MEASUREMENT AND PAYMENT

PART 1 GENERAL

1.1 REFERENCES

The publication listed below forms a part of this specification to the extent referenced. The publication is referred to in the text by basic designation only.

U.S. ARMY CORPS OF ENGINEERS (USACE)

EM 1110-2-1003 (2013) Hydrographic Surveying

1.2 GENERAL INFORMATION

In each instance, the Contract price for an item will constitute full compensation as herein specified, as shown, or as otherwise approved. The Contract price and payment will also constitute full compensation for all work incidental to completion of the item, unless such work is otherwise specifically mentioned for separate payment under another line item. In the event any work is required by the specifications Sections or by the drawings and not specifically mentioned in the measurement and payment paragraphs, separate and direct payment will not be made and all costs thereof are incidental to and included in the Contract prices and payments for all Contract Line Item Numbers (CLIN) listed in the price schedule.

1.3 UNIT PRICE PAYMENT ITEMS

Payment items for the work of this Contract on which the Contract unit price payments will be made are listed in Section 00 21 00, PRICE SCHEDULE, and described below. The unit price and payment made for each item listed will constitute full compensation for furnishing all plant, labor, materials, and equipment; performing all associated Contractor quality control, environmental protection, commissioning, preparation of as-builts, O&M manuals, tests and reports, meeting safety requirements;

and for performing all work required for each of the unit price items.

1.4 JOB PAYMENT ITEMS

Payment items for the work of this Contract for which Contract job payments will be made are listed in Section 00 21 00, PRICE SCHEDULE, and described below. Include all costs for items of work, which are not specifically mentioned to be included in a particular job item, in the listed job item most closely associated with the work involved. The job price and payment made for each item listed will constitute full compensation for furnishing all plant, labor, materials, and equipment;

performing all associated Contractor quality control, environmental protection, tests and reports, meeting safety requirements; and for performing all work required for which separate payment is not otherwise provided. Provide a schedule of values for job items prior to the start of work and submit an updated schedule with each payment request.

SECTION 01 22 00.00 82 Page 3

PART 2 PRODUCTS

Not Used.

PART 3 EXECUTION

3.1 MEASUREMENT AND PAYMENT

3.1.1 Mobilization and Demobilization, CLIN 0001

a. Measurement and payment for Mobilization and Demobilization will be considered complete and full compensation for the effort and cost to prepare the Contractor's plant and equipment for shipment; transport to and from the job site all necessary Contractor plant including related equipment, fuel, supplies, personnel required for its operation, and Government field office setup and on-board accommodations as stated in Section 35 20 23.00 82 , DREDGING AND CHANNEL CLEARING; making ready for dredging; and maintaining plant and equipment in working condition at the site during the dredging period, and will be paid for at the Contract job price for this item. Plants subject to pre-work safety inspection requirements will not be considered "mobilized" until such equipment is determined to be in compliance as determined by the floating plant inspection and verified during the joint equipment walk-through. For bidding purposes, HUM is the designated point of mobilization. Demobilization must be from the final dredging area, regardless of location.

b. Mobilization will be paid once all equipment needed to commence dredging and perform material placement operations is on site in accordance with the schedule required in Section 01 10 00.00 82 , CONTRACT ADMINISTRATION DATA (DREDGING). All costs associated with mobilization of all equipment for all base and option items will be included in this bid item. No more than a total of 60 percent will be paid for mobilization; mobilization payments for multiple dredge plants will be determined by the Government and will be based on the approved project schedule. This CLIN may be separated into subitems for funding purposes. Mobilization charges will be spread throughout the subitems.

c. The remaining 40 percent will be paid upon final completion and acceptance of the minimum specification requirements at all work sites and areas of operation. Demobilization charges may be spread throughout the funding subitems .

3.1.2 HUM, Bin Measure to Required Depth, HOODS Ocean Placement, Base and option Line Items, CLINs 0002 and 0003

a. Measurement and payment for this bid item will be considered complete and full compensation for the effort and cost to excavate the entire dredging pay areas to not less than the required dredging depths in accordance with Section 35 20 23.00 82 , DREDGING AND CHANNEL CLEARING, including placement of all dredged material within the Government furnished placement sites, and will be paid at the Contract unit price (cubic yards of dredged material) for this item.

b. Quantity measurement: Load measurements will be taken utilizing the mechanical ullage sensor system as required in Section 35 20 23.03 82 , MECHANICAL ULLAGE SENSORS. In the event that manual load measurements are required, notify the GQAR prior to taking measurements.

SECTION 01 22 00.00 82 Page 4

c. Non-payable Material. Material removed from outside the dimensions of the dredging pay prism, material that is improperly transported (violations of draft limitations set forth in the Certificate of Inspection, Load Line Certification, or Stability Letter including any amendments thereto), or material not placed within the designated material placement areas (misplaced material) will be considered non-payable quantity and will be deducted from the total measured quantity. Non-payable quantity may be determined from survey data, electronic dredge data or observation of the on-board CQC or GQAR.

When the quantity of non-payable material can be determined on the spot, the CQCM and GQAR must calculate the non-payable material as a percentage of the entire load. The volumes arrived at through the review and checking process will be used for actual pay purposes.

3.1.3 LCR, RM 7+00 to RM 17+20, Bin Measure, Flow Lane (FL) and Transfer Site (TS) Placement, Base Line Item, CLIN 0004

a. Measurement and payment for the bid items stated above will be considered complete and full compensation for the effort and cost to excavate the required quantities from within the limits of the dredging pay prism in accordance with Section 35 20 23.00 82 , DREDGING AND CHANNEL CLEARING, including placement of all dredged material within the Government-furnished in-water placement areas, and will be paid at the Contract unit price (cubic yards of dredged material) for this item.

b. Transport of material from dredge area to placement site will not be paid under this CLIN. All efforts and costs associated with transporting of material will be paid under either CLIN 0010 LCR, Increment Transit Miles for Material Placement Site (between zero and eight miles one-way) or CLIN 0011 LCR Increment Transit Miles for Material Placement Site (greater than eight miles one-way), based on site specific one-way haul distance. No costs associated with transporting material should be included in this CLIN.

c. Quantity measurement: Reference Paragraph 3.1.2 subitem (b).

d. Non-payable Material. Reference Paragraph 3.1.2 subitem (c).

3.1.4 LCR, RM 3+00+00 to RM 105+00+00, Pre/Post Dredge Survey, FL and TS Placement, Base and option Line Items, CLINs 0005, 0006, and 0007

a. Measurement and payment for this bid item will be considered complete and full compensation for the effort and cost to excavate the entire dredging pay areas to not less than the required dredging depths in accordance with Section 35 20 23.00 82 , DREDGING AND CHANNEL CLEARING, including placement of all dredged material within the Government furnished in-water placement areas, and will be paid at the Contract unit price (cubic yards of dredged material) for this item.

b. Transport of material from dredge area to placement site will not be paid under this CLIN. All efforts and costs associated with transporting of material will be paid under either CLIN 0010 LCR, Increment Transit Miles for Material Placement Site (between zero and eight miles one-way) or CLIN 0011 LCR Increment Transit Miles for Material Placement Site (greater than eight miles one-way), based on site specific one-way haul distance. No costs associated with transporting material should be included in this CLIN.

SECTION 01 22 00.00 82 Page 5

c. The Government will determine cubic yard quantities for payment by taking pre-dredge and post-dredge surveys utilizing electronic depth sounding and horizontal positioning equipment. Payment will be made for material removed from within the dredge pay prism in accordance with Paragraph SURVEYS.

d. Non-payable Material. Reference Paragraph 3.1.2 subitem (c).

3.1.5 LCR, RM 3+00+00 to RM 105+00+00, Bin Measure to Required Depth, FL and TS Placement, Base Line Item, CLIN 0008

a. Measurement and payment for this bid item will be considered complete and full compensation for the effort and cost to excavate the entire dredging pay areas to not less than the required dredging depths in accordance with Section 35 20 23.00 82 , DREDGING AND CHANNEL CLEARING, including placement of all dredged material within the Government-furnished in-water placement areas, and will be paid at the Contract unit price (cubic yards of dredged material) for this item.

b. Transport of material from dredge area to placement site will not be paid under this CLIN. All efforts and costs associated with transporting of material will be paid under either CLIN 0010 LCR, Increment Transit Miles for Material Placement Site (between zero and eight miles one-way) or CLIN 0011 LCR Increment Transit Miles for Material Placement Site (greater than eight miles one-way), based on site specific one-way haul distance. No costs associated with transporting material should be included in this CLIN.

c. Quantity measurement: Reference Paragraph 3.1.2 subitem (b).

d. Non-payable Material. Reference Paragraph 3.1.2 subitem (c).

3.1.6 LCR, RM 7+00 to RM 17+20, Increment for Columbia River Deep Water Site (DWS) Placement, option Line Item, CLIN 0009

This optional line item applies only when the Government directs material dredged under the LCR Base CLINs to be placed at the Deep Water Site (DWS). The Government will not direct optional LCR quantity CLINs to be disposed of at the DWS. This CLIN is intended for early-season LCR work between RM 3+00 and RM 1 87+020 when conditions typically allow the use of the DWS.

a. Measurement: Measurement for this bid item will be the pay cubic yards (CY) in each hopper load placed at the DWS. Reference Paragraph

3.1. 24 subpart ( bc) quantity measurement.

b. Payment: Payment will be made at the contract unit price per cubic yard, applied to the full hopper pay quantity placed at the DWS. This payment is an additional increment to any applicable LCR increment Transit Miles CLINs (0010 or 0011). Payment will be made following completion of all LCR Base CLIN quantities directed to the DWS..

c. Non-Payable Material: Payment under this CLIN will not be made for:

(1) Material placed at any location other than the DWS.

(2) Loads disposed during transit or any placement not directed by the Government.

SECTION 01 22 00.00 82 Page 6

(3) Non-payable material referenced in Paragraph 3.1.2 subitem (c ).

3.1.7 LCR, Increment Transit Miles for Material Placement Site (between zero and eight miles one-way), CLIN 0010

This line item applies to all Lower Columbia River (LCR) Maintenance Dredging and Placement operations occurring between RM 3+00 and RM 105+20, unless otherwise specified.

a. Measurement for this bid item will be based on the actual one-way transit distance, in river miles, from 0.0 through 8.0 miles, measured from the centroid of the dredge area to the centroid of the placement site and multiplied by the pay cubic yards (CY) in each hopper load.

Distances will be determined by the Government, rounded to the nearest

0.1 river mile, and shown on the Contract Drawings in accordance with Section 35 20 23.00 82, DREDGING AND CHANNEL CLEARING.

If the measured one-way distance for a hopper load is 8.0 miles or less, the entire distance for that load will be paid under CLIN 0010.

Loads will not be split between CLIN 0010 and CLIN 0011.

b. Payment for this item will be made at the Contract unit price per cubic yard-mile (CY·MI) and will be in addition to the price per cubic yard for LCR Dredging and Placement. For loads placed into multiple placement sites, pay quantities will be prorated based on the bin-sounding-verified percentage of CY credited to each site.

c. Material disposed of while transiting between dredge areas will not be measured or paid under this CLIN.

d. Payment for this CLIN will be made after completion of all LCR work areas, including optional CLINs if exercised.

3.1.8 LCR Increment Transit Miles for Material Placement Site (greater than eight miles one-way), CLIN 0011

This line item applies to all Lower Columbia River (LCR) Maintenance Dredging and Placement operations occurring between RM 3+00 and RM 105+20, unless otherwise specified.

a. Measurement for this bid item will be based on the actual one-way transit distance, in river miles, over 8.0 miles, measured from the centroid of the dredge area to the centroid of the placement site and multiplied by the pay cubic yards (CY) in each hopper load. Distances will be determined by the Government, rounded to the nearest 0.1 river mile, and shown on the Contract Drawings in accordance with Section 35

20 23.00 82, DREDGING AND CHANNEL CLEARING.

If the measured one-way distance for a hopper load is over 8.0 miles, the entire distance for that load will be paid under CLIN 0011. Loads will not be split between CLIN 0010 and CLIN 0011.

b. Payment for this item will be made at the Contract unit price per cubic yard-mile (CY·MI) and will be in addition to the price per cubic yard for LCR Dredging and Placement. For loads placed into multiple placement sites, pay quantities will be prorated based on the bin-sounding-verified percentage of CY credited to each site.

SECTION 01 22 00.00 82 Page 7

c. Material disposed of while transiting between dredge areas will not be measured or paid under this CLIN.

d. Payment for this CLIN will be made after completion of all LCR work areas, including optional CLINs if exercised.

3.1.9 LCR, Intra-Project Transit Miles, Base Line Item, CLIN 0012

This item pays for Government-directed movement of the dredge between designated dredging areas within the project. Payment is made at the Contract unit price per mile and constitutes full compensation for all associated costs, including mobilizing all dredging plant, equipment, and personnel required for intra-project relocation.

a. Measurement will be based on the one-way river-mile distance between the centroid of the current dredging location and the centroid of the next Government-directed dredging location. Distances will be determined by the Government.

b. Payment under this item applies only to the following Government-directed movements:

(1) Transit from MCR RM 3+00 to the first LCR dredging location at the start of LCR work.

(2) Transit between LCR dredging locations.

(3) Transit from the last LCR dredging location back to MCR RM 3+00 upon completion of all LCR work areas.

c. Non-payable Transit: Payment will not be made under this item for:

(1) Transit not directed by the Government.

(2) Transit caused by weather, sea state, or other operational conditions.

(3) Transit between MCR and any designated Foul Weather Backup (FWB) dredging locations.

(4) Transit associated with a second or subsequent mobilization to re-dredge an area for final acceptance.

(5) Transit occurring after the dredge reaches MCR RM 3+00 upon completion of the final LCR work area, including all subsequent demobilization transit.

3.1.10 COO, Incremental Mobilization and Demobilization, option Line Item, CLIN 0013

a. Measurement and payment for mobilization and demobilization will be considered complete and full compensation and will be paid at the Contract job price, for the effort and cost, above and beyond the initial mobilization associated with CLIN 0001, to transport to and from the Coos Bay project all necessary serviceable Contractor plant including related equipment, fuel, supplies, and personnel required for its operation.

b. Mobilization will be paid once all equipment needed to commence

SECTION 01 22 00.00 82 Page 8 dredging and perform material placement operations is on site in accordance with the schedule required in Section 01 10 00.00 82, CONTRACT ADMINISTRATION DATA (DREDGING). All costs associated with mobilization of all equipment for this item will be included in this bid item. No more than a total of 60 percent will be paid for mobilization; mobilization payments for multiple dredge plant will be determined by the Government and will be based on the approved project schedule.

c. The remaining 40 percent will be paid upon final completion and acceptance of the minimum specification requirements at the HUM, MCR, and LCR work sites.

3.1.11 COO, Bin Measure to Required Depth, Site-F Ocean Placement, option Line Item, CLIN 0014

a. Measurement and payment for this bid item will be considered complete and full compensation for the effort and cost to excavate the entire dredging pay areas to not less than the required dredging depths in accordance with Section 35 20 23.00 82 , DREDGING AND CHANNEL CLEARING, including placement of all dredged material within the Government furnished placement sites, and will be paid at the Contract unit price (cubic yards of dredged material) for this item.

b. Quantity measurement: Reference Paragraph 3.1.2 subitem (b).

c. Non-payable Material. Reference Paragraph 3.1.2 subitem (c).

3.1.12 MCR, Bin Measure, Shallow Water Site (SWS) or North Jetty Site (NJS) Placement, Base and option Line Items, CLINs 0015, and 0016

a. Measurement and payment for the bid items stated above will be considered complete and full compensation for the effort and cost to excavate the required quantities from within the limits of the dredging pay prism in accordance with Section 35 20 23.00 82 , DREDGING AND CHANNEL CLEARING, including placement of all dredged material within the Government-furnished in-water placement areas, and will be paid at the Contract unit price (cubic yards of dredged material) for this item.

b. Quantity measurement: Reference Paragraph 3.1.2 subitem (b).

c. Non-payable Material. Reference Paragraph 3.1.2 subitem (c).

d. Placement sites SWS and NJS will be provided for all material dredged from MCR for the above referenced CLINs.

3.1.13 MCR, Bin Measure, Increment for Operations and Maintenance Deep Water Site (DWS) Placement, Base and option Line Items, CLINs 0017, 0018, and 0019

a. Measurement and payment for the bid items stated above will be considered complete and full compensation for the effort and cost to place the material associated with CLINs 0013 and 0014, in the DWS instead of the SWS or NJS.

b. Payment will be an incremental cost per cubic yard in addition to the price per cubic yard for CLINS 0015 and 0016.

SECTION 01 22 00.00 82 Page 9

c. Quantity measurement: Reference Paragraph 3.1.2 subitem (b).

d. Non-payable Material. Reference Paragraph 3.1.2 subitem (c).

3.1.14 MCR, Bin Measure, Increment for Operations and Maintenance South Jetty Site (SJS) Placement, option Line Item, CLIN 0020

a. Measurement and payment for the bid items stated above will be considered complete and full compensation for the effort and cost to place the material listed above in Paragraph 3.1.9, in the SJS instead of the SWS or NJS.

b. Payment will be an incremental cost per cubic yard in addition to the price per cubic yard for CLINS 0015 and 0016.

c. Quantity measurement: Reference Paragraph 3.1.2 subitem (b).

d. Non-Payable Material: Reference Paragraph 3.1.2 subitem (c).

3.1.15 HUM, Third Party Hydrographic Survey, option Line Item, CLIN 0021

a. Measurement and payment for these bid items will be considered complete and full compensation for the effort and cost to provide a 3rd Party Surveyor to complete surveys of the work area(s). This bid item will consist of the mobilization of all necessary crew and equipment, setup and teardown, and establishment of control point(s), to conduct two separate surveys, consisting of one Pre-Dredge survey prior to commencement of dredge work and one Post-Dredge survey following performance of dredge work. These circumstances will require multiple mobilizations of the surveyor(s) throughout the Contract.

b. In the event that the post dredge survey indicates that the results of the completed dredging work does not meet the project acceptance criteria listed in Section 35 20 23.00 82 and the government does not provide acceptance for the given area, any additional post dredge surveys required will be the Contractor's responsibility.

c.Payment for surveys under this item will be made at the Contract unit price based on the number of surveys completed within the pay request period.

3.1.16 LCR, Third Party Hydrographic Survey, option Line Item, CLIN 0022

a. Measurement for this item will be made per job. One job consists of a pair of surveys for a single LCR dredge acceptance area:

(1) One Pre-Dredge Survey conducted prior to dredging the acceptance area, and;

(2) One Post-Dredge Survey conducted after dredging is completed in that acceptance area

b. The Government will identify the acceptance areas in advance. Each acceptance area survey pair (pre/post) will count as one job for measurement purposes.

c. If the initial Post-Dredge survey for an acceptance area shows that required project acceptance criteria (Section 35 20 23.00 82 DREDGING

SECTION 01 22 00.00 82 Page 10

AND CHANNEL CLEARING) have not been met and the Government does not grant acceptance, any additional post-dredge surveys required for re-dredging of that same area will be performed at the Contractor’s expense and will not be measured or paid under this CLIN.

d. Payment will be made at the Contract unit price per job, based on the number of acceptance area survey pairs (pre/post) satisfactorily completed during the pay period. Mobilization, equipment, personnel, control setup, data processing, and all other survey-related costs necessary to perform each job are incidental to this item and included in the unit price.

3.1.17 MCR, Third Party Hydrographic Survey, option Line Item, CLIN 0023

a. Measurement: Reference paragraph HUM, Third Party Hydrographic Survey, CLIN 0021 Subitem a.

b. Measurement: Reference paragraph HUM, Third Party Hydrographic Survey, CLIN 0021 Subitem b.

c. Payment: Reference paragraph HUM, Third Party Hydrographic Survey, CLIN 0021 Subitem c.

3.1.18 COO, Third Party Hydrographic Survey, option Line Item, CLIN 0024

a. Measurement: Reference paragraph HUM, Third Party Hydrographic Survey, CLIN 0021 Subitem a.

b. Measurement: Reference paragraph HUM, Third Party Hydrographic Survey, CLIN 0021 Subitem b.

c. Payment: Reference paragraph HUM, Third Party Hydrographic Survey, CLIN 0021 Subitem c.

d. COO: Work areas will be accepted based on hydrographic surveys as described in Subpart SURVEYS of the Section. COO survey data will be processed using a median depth sort with a 70 by 70 foot Matrix. The Government reserves the right to accept a work area which does not meet the acceptance criteria listed above. Dredging is not allowed below the maximum dredging depth.

3.1.19 East Sand Island (ESI), Incremental Mobilization and Demobilization for Pump-ashore Operations, option Line Item, CLIN 0025

a. Measurement and payment will be made for costs associated with mobilization and demobilization for ESI Pump-Ashore Operations for Beach Fill, as defined in SUPPLEMENTARY CONDITION 252.236-7004 PAYMENT FOR MOBILIZATION AND DEMOBILIZATION. For bidding purposes, this item is considered separate from CLIN 0001 Mobilization and Demobilization and pricing should be based on the transportation to and from the job site only for the portion of transport where it is necessary to deviate from the mobilization and demobilization paid for under CLIN 0001. Work includes, but is not limited to, transporting the marine plant and all items of attendant equipment to the work site, installation of temporary facilities including the staging and storage area, beach work area, protection of existing facilities, repair to any facilities damaged, dredge access, preparation of all submittals and Project Record Documents, including as-built drawings and obtaining and complying with all permits (local, state and federal).

SECTION 01 22 00.00 82 Page 11

Upon completion of all phases of the work, remove the plant and equipment from the site, complete in place and accepted.

b. 60 percent will be paid to the Contractor upon mobilization of all equipment needed to commence dredging and pump ashore material placement operations. The remaining 40 percent will be paid to the Contractor upon final completion and acceptance of all pump ashore work associated with CLINs 0026, 0027, and 0030.

3.1.20 ESI, Pre/Post Survey, Increment for Shoreline Placement, Optional Line Items, CLIN 0026 and CLIN 0027

a. Measurement and Payment: Payment under this CLIN will cover all incremental costs associated with diverting dredged material from in-water placement under CLINs 0004, 0015, or 0016 to the designated East Sand Island (ESI) pump-ashore placement site, and for constructing the beach fill in accordance with the contract plans and specifications.

b. This increment includes the additional transport, pump-ashore operations, placement, grading, and all incidental equipment, labor, and activities required to place material at ESI instead of the in-water placement sites.

c. For material dredged between RM 7+00 and RM 17+20 in the Lower Columbia River (LCR) under CLIN 0004, transport from the dredge area centroid to RM 7+00 will be paid separately under CLINs 0010 and 0011.

Any remaining transportation and pump-ashore placement effort required to deliver material to the ESI site, beyond that compensated under CLINs 0010 and 0011, must be included in this increment under CLINs 0026 and 0027.

d. Payment Method: Payment will be made at an incremental cost per cubic yard of material placed at ESI, in addition to the payment for dredging under CLINs 0004, 0015, or 0016. This CLIN does not pay for dredging quantities or standard transit already compensated under other CLINs. This increment covers the transport and placement of material specifically at ESI instead of in-water placement sites. .

e. Measurement: The quantity of material for which payment will be made under this CLIN will be determined by in-place measurement, in cubic yards, of material acceptably placed within the Government-furnished beach fill template. Measurement will be based on the difference between the pre-placement and post-placement topographic surveys using the average end-area method.

f. Non-Payable Material: Material placed outside the designated beach fill limits shown on the contract drawings, material obtained from outside the approved dredge site or below the maximum dredging depth, or material that is improperly transported or misplaced will not be paid under this CLIN. Material placed in excess of the allowable beach fill tolerances and not designated for avian dissuasion overbuild/mounding will be considered non-payable under CLINs 0026 and 0027.

g. Constructed Caspian Tern (CATE) Colony Template Inclusion: The CATE colony pad is a required component of the Government-furnished beach fill template and must be constructed as shown on the Contract drawings. The CATE colony pad must be circular in plan, with a minimum

SECTION 01 22 00.00 82 Page 12 surface area of one acre, and must be constructed to a nominal crest elevation of 16 feet NAVD88, with a tolerance of +/- 0.5 feet and associated side slopes. All dredged material placed within the limits of the beach fill template, including material forming the CATE colony pad, must be measured and paid for in accordance with subparagraphs

(a) through (d). No separate payment will be made for construction of the CATE colony pad.

h. Intentional Overbuild for Avian Dissuasion Mounding: Material intentionally placed above the design beach fill crest elevations within the designated avian dissuasion mounding zones shown on the Contract Drawings may be included in the measured in-place quantity for payment under this CLIN, provided the following conditions are met:

(1) Placement Limits: The material is placed within the lateral beach fill limits and within areas identified on the drawings as eligible for avian dissuasion overbuild.

(2) Authorized Overbuild Elevation: To provide material for subsequent avian dissuasion shaping, the Contractor is permitted to place material up to a maximum of 1.5 feet above the applicable design crest elevation (e.g., 12 ft or 13 ft NAVD88, as shown on the drawings) within designated mounding zones.

(a) Material placed within this authorized overbuild elevation must be considered part of the accepted pump-ashore beach fill and will be measured and paid as in-place quantity under the applicable pump-ashore placement CLINs, provided all required slopes and elevation limits below the crest are achieved.

(b) Material placed in excess of 1.5 feet above the design crest elevation is not authorized unless expressly directed by the Contracting Officer (CO) and will be considered non-payable.

(3) Protection of Accepted Template: Following completion of the post-placement acceptance survey, do not excavate, disturb, or regrade beach fill material below the accepted design crest elevation (12 ft or 13 ft NAVD88, as applicable), except when explicitly directed by the CO.

(4) Survey Documentation: The post-placement survey must clearly document the constructed beach fill surface, including areas of authorized intentional overbuild, to support acceptance of the beach fill template and to identify material available for subsequent avian dissuasion shaping.

Subsequent shaping, grading, or reconfiguration of authorized overbuild material into avian dissuasion mounds or trenches will be performed under Optional CLIN 0030 and must not require re-survey or adjustment of pump-ashore payment quantities, provided avian dissuasion activities do not disturb the beach fill template below the design crest elevation (12 ft or 13 ft NAVD88).

3.1.21 ESI, Topographic/UAS Survey Package, Optional Line Items, CLIN 0028

a. Payment will be made for providing the complete Topographic/UAS

SECTION 01 22 00.00 82 Page 13

Survey Package required to support the design, construction, acceptance, and documentation of the East Sand Island (ESI) pump-ashore beach fill work. This includes pre-placement and post-placement topographic surveys, UAS data acquisition, photogrammetric processing, orthomosaic generation, surface modeling, and all associated deliverables required by Section 01 11 00.42 SUMMARY OF WORK and Section 35 24 13.11 BEACH FILL OPERATIONS.

b. Survey work under this CLIN includes mobilization and demobilization of survey equipment, establishment and verification of ground control, UAS flights, data processing, QA/QC review, submission of digital survey products in required formats, and coordination with the Government for data acceptance. Surveys must document the constructed beach fill template, including the CATE colony pad and any material intentionally placed above the nominal template elevation for subsequent avian dissuasion mounding, as shown on the drawings.

c. Post-placement surveys will be used to establish acceptance of the beach fill template elevations and slopes in accordance with the Contract Documents. Material placed above the nominal beach template elevation for later shaping into avian dissuasion mounds will be documented in the post-placement survey but will not be separately measured for payment under this CLIN.

d. Payment will be made at the Contract lump sum price for this item.

No separate payment will be made for repeat flights, recollection, or reprocessing required due to Contractor error.

3.1.22 ESI, Vegetation, Optional Line Item, CLIN 0029

a. Payment will be made for all labor, equipment, materials, and operations required to establish vegetation on East Sand Island in accordance with Section 32 90 00.00 25 SITE RESTORATION FOR EAST SAND ISLAND, the Contract Drawings, and applicable environmental constraints. Work includes site preparation, seeding, protection of vegetated areas, and replacement of vegetation damaged by Contractor operations.

b. Vegetation establishment under this CLIN must be limited to areas above the Mean Higher High Water (MHHW) elevation, as shown on the Contract Drawings, and must include:

(1) Berm Crest and Upper Beach Areas

Vegetation must be placed on berm crest and upper beach areas located above MHHW, including areas at or above the design crest elevations (e.g., 12-13 feet NAVD88), except where restricted by avian dissuasion requirements.

(2) Caspian Tern (CATE) Colony Perimeter

Vegetation must be established around the perimeter of the designated 1-acre Caspian Tern (CATE) colony, as shown on the drawings, to stabilize disturbed soils and delineate the colony footprint. Vegetation placement must not obstruct required line-of-sight between the colony and adjacent water.

(3)Coordination With Avian Dissuasion Features (Visual Corridor)

SECTION 01 22 00.00 82 Page 14

Vegetation must not be placed in locations that would compromise the effectiveness of avian dissuasion mounding or trenching features constructed under CLIN 0030. Vegetation on or immediately adjacent to avian dissuasion mounds must only be placed where specifically approved by the CO.

(4) Prohibited Areas

Vegetation must not be placed:

(a) Below the MHHW elevation

(b) On the active foreshore or nearshore slope

(c) In areas where vegetation would encourage colonial nesting inconsistent with the avian management strategy

c. Payment will be made at the Contract lump sum price for this item and constitutes full compensation for all materials, installation, maintenance, equipment, labor, and incidental work necessary to complete vegetation establishment. No separate payment will be made for replacement of vegetation damaged by Contractor activities.

3.1.23 ESI, Avian Dissuasion Mounding, Optional Line Item, CLIN 0030

a. This optional job line item includes all labor, equipment, and operations required to regrade, shape, and finish previously placed and accepted beach fill material to form avian dissuasion features within the Government-designated mounding zones on East Sand Island, as shown on the Contract Drawings and described in Section 35 20 23.10 82.

Work under this CLIN includes, but is not limited to:

(1) Shaping and regrading beach-fill material intentionally placed above the accepted beach fill crest elevation for the purpose of avian dissuasion, following completion of Government acceptance surveys under CLINs 0026 and 0027.

(2) Constructing avian dissuasion features in accordance with the locations, limits, spacing, and height restrictions shown on the Contract Drawings and specified in Section 35 20 23.10 82

PUMP-ASHORE OPERATIONS FOR BEACH FILL.

(3) Within the designated buffer and visual corridor in front of the 1-acre Caspian Tern (CATE) colony, constructing only low-profile dissuasion features, such as shallow blade-cut trenches or small mounds not exceeding approximately 2 feet in height, configured to avoid obstructing the colony's required line-of-sight to open water.

(4) Final dressing and shaping of mounded surfaces to achieve a naturally irregular topography, free of abrupt grade breaks, vertical faces, or erosion-prone features, while maintaining overall beach stability.

b. No excavation, disturbance, or rehandling of beach fill material below the accepted crest elevation (12 or 13 feet NAVD88, as applicable) must occur under this CLIN.

SECTION 01 22 00.00 82 Page 15

c. Measurement for this item will be one job, complete in place, including all shaping, grading, rehandling, and finishing necessary to construct the avian dissuasion features as directed by the CO.

d. Payment for this item will be made at the Contract lump sum price for CLIN 0030 upon completion of all required avian dissuasion mounding and after Government acceptance of the completed work.

e. Payment constitutes full compensation for all costs associated with:

(1) Equipment and operators

(2) Labor

(3) Regrading and shaping of placed beach fill material

(4) Finish grading and surface dressing

(5) Coordination with pump-ashore operations and acceptance surveys

(6) All incidental work necessary to complete the avian dissuasion mounding

f. No adjustment to the Contract price will be made based on the quantity or volume of material reshaped unless directed by a written modification from the CO.

g. No payment under this CLIN will be made for:

(1) Dredging of material

(2) Pump-ashore placement of material

(3) Initial placement of material above the beach fill crest elevation

h. Placement of dredged material, including material intentionally placed above the accepted beach template for later shaping, is paid under the applicable dredging and pump-ashore CLINs. CLIN 0030 applies solely to post-acceptance shaping and grading activities.

3.2 PAYMENT METHOD

3.2.1 Bin Measure Areas

In Bin measure work areas, the Government will provide a required quantity for the Contractor to dredge and a maximum dredging pay depth. In LCR work areas the dredging pay prism is formed by the maximum pay depth, the 1-vertical to 3-horizontal side slopes, and the horizontal channel limits or maximum pay width. In MCR work areas, the dredging pay prism is formed by the maximum pay depth, vertical side slope, and the horizontal channel limits or maximum pay width. The required dredging quantity will be a maximum of 85 percent of the estimated quantity available as determined by single-beam or multi-beam Government hydrographic surveys, unless mutually agreed upon by the Contractor and the Government. A work area will be accepted when the total quantity dredged is within a single hopper load quantity of the total required dredging quantity. Survey the entire dredging area every 72 hours minimum unless there has been no dredging in

SECTION 01 22 00.00 82 Page 16 the work area during that period.

3.2.2 Bin Measure to Required Depth Areas

In Bin measure to Required Depth work areas, the Government will provide a required channel depth, with a maximum pay depth of one to 2 feet beyond the required channel depth (2 feet in both HUM and COO, and one foot in LCR), and a required toe depth which is equal to or shallower than the required channel depth. The dredging pay prism is formed by the maximum pay depth, the 1-vertical to 3-horizontal side slopes and the horizontal channel limits or maximum pay width. Request post-dredge Government hydrographic surveys in accordance with this Section and survey the entire dredging area every 48 hours minimum.

a. HUM: Work areas will be accepted based on hydrographic surveys as described in Subpart SURVEYS of this Section. HUM survey data will be processed using a median depth sort with a 70 by 70 foot Matrix. Use actual X-Y positions where possible; otherwise, position calculated values at the cell center. The Government reserves the right to accept a work area which does not meet the acceptance criteria listed above. Dredging is not allowed below the maximum dredging depth.

b. LCR: Work areas will be accepted based on hydrographic surveys as described in Subpart SURVEYS of this Section. Survey data will be processed using a median depth sort with a 70 by 70 foot Matrix. Use actual X-Y positions where possible; otherwise, position calculated values at the cell center. A work area will be accepted when:

(1) All of the sorted survey values inside the prescribed work area limits (unless within 75 feet of cut line/toe) are equal to or deeper than the required channel depth.

(2) All of the sorted survey values within 75 feet of the cut line/toe are equal to or deeper than the required toe depth. The Contractor will not be required to remove the material on the side slopes for acceptance.

NOTE: For LCR work areas, the Government may require two different toe depths for opposite sides of the channel within the same work area. The Government may also require two different depths within the channel. The depth split would occur only long-channel and not cross-channel, and typically fall on the channel centerline.

c. COO: Work areas will be accepted based on hydrographic surveys as described in Subpart SURVEYS of this Section. COO survey data will be processed using a median depth sort with a 70 by 70 foot Matrix. Use actual X-Y positions where possible; otherwise, position calculated values at the cell center. The Government reserves the right to accept a work area which does not meet the acceptance criteria listed above.

Dredging is not allowed below the maximum dredging depth.

3.2.3 Pre/Post Dredge Survey

LCR: In Pre/Post Dredge Survey work areas, the Government will provide a required channel depth, with a maximum pay depth of one foot beyond the required channel depth, and a required toe depth which is equal to or shallower than the required channel depth. The dredging pay prism is formed by the maximum pay depth, the H:V, rise over run, 3-horizontal to 1-Vertical, and the horizontal dredging area limits. Request post-dredge

SECTION 01 22 00.00 82 Page 17

Government hydrographic surveys in accordance with this Section and survey the entire dredging area every 72 hours minimum. Work areas will be accepted based on multi-beam Government hydrographic survey data processed using a median depth sort, using actual X-Y (where possible), with a 70 by 70 foot Matrix. A work area will be accepted when:

a. All of the sorted survey values inside the prescribed work area limits (unless within 75 feet of channel edge/toe) are equal to or deeper than the required channel depth.

b. All of the sorted survey values within 75 feet of the cut line/toe are equal to or deeper than the required toe depth. The Contractor will not be required to remove the material on the side slopes for acceptance.

NOTE: The Government may require two different toe depths for opposite sides of the channel within the same work area within LCR work areas.

3.2.4 Beach Pre/Post Placement Survey

Refer to Section 01 11 00.42 82 SUMMARY OF WORK - EAST SAND ISLAND and Section 35 24 13.11 82 TRAILING SUCTION DREDGING for beach pre/post placement survey requirements.

3.3 SURVEYS

3.3.1 Government Surveys

a. In both pre- and post-dredge and bin measure to required depth acceptance areas, the Government will determine acceptance by utilizing electronic depth soundings and horizontal positioning equipment. Dredge material quantities determined by survey will used for payment solely in pre- and post-dredge survey work areas.

Accuracy(ies) will be in accordance with stated quality control values in EM 1110-2-1003 . Government methods for payment and acceptance surveys are listed below by project. The Government may use multi-beam or single-beam methods for surveys not listed below:

(1) HUM: Sounding depths used for determining acceptance will be derived from multi-beam surveys, utilizing Wide Area Augmentation System (WAAS) or RTK, corrected for sound velocity and tides.

(2) LCR: Sounding depths used for determination of pay quantity volumes for Pre/Post Dredge Survey work areas will be derived from surveys utilizing multi-beam methods with Advanced Channel Design for volume calculations, and corrected for tide. Multi-beam methods will also be used for Government surveys to determine acceptance. The government may elect to use kinematic tide data (KTD) files for tide corrections to LCR surveys.

(3) COO: Sounding depths used for determining acceptance will be derived from multi-beam surveys, utilizing Real Time Kinematic (RTK), for vertical control.

b. Government Equipment: The following survey equipment (or comparable based on asset availability) will be used by the Government Survey Crews during the collection of sounding data, as per the USACE Hydrographic Survey Manual ( EM 1110-2-1003 ), and will be considered

SECTION 01 22 00.00 82 Page 18 the standard for which data is obtained:

HUM

Positioning and Attitude System: POS-MV 320 IMU or Integrated Applanix IMU Multibeam Echosounder: Teledyne RESON T50P or T20P Sound Velocity Profiler: AML BaseX2

LCR and COO Positioning and Attitude System: Applanix POS MV V5 Wavemaster Multibeam Echosounder: Teledyne RESON T-50 Singlebeam Echosounder: Teledyne ODOM CV-100 with a 3 degree 200khz transducer Sound Velocity Profiler: AML BaseX2

NOTE: For all work areas, the Government will be available at the request of the Contractor to run check surveys between the Contractor's and Government's survey vessels prior to the start of work at each project location. Requests for check surveys should be submitted five days in advance. The check survey at HUM will only be conducted at the time that the associated pre-dredge survey is collected, thus the Contractor survey vessel would need to be on site prior to the start of work. At the request of the Contractor, the Government will provide the survey line files by which surveys are run.

c. The dredging pay area prism is defined in Paragraph PAYMENT METHODS and in Section 35 20 23.00 82 , DREDGING AND CHANNEL CLEARING, Paragraph Dredging Requirements, and is shown in Attachment Descriptive Sketch. Cubic yard volumes will be computed by comparing the most recent Government's pre-dredge and post-dredge hydrosurvey soundings sorted on a 5 foot by 5 foot grid of median depth values against the Advanced Channel Design template. Use actual X-Y positions where possible; otherwise, position calculated values at the cell center.