SECTION_35_20_23_DREDGING,_Paragraphs_Work_Covered_By_Contract_Price_and_Estimated_Quantities_REV_A.pdf

FY17 Atlantic Intracoastal Waterway Charleston Harbor to W912HP-B-17-0005 Port Royal Maintenance Dredging

SECTION 35 20 23 PAGE 1

1.4.2. Work Covered By Contract Price

ITEM 0001, MOBILIZATION AND DEMOBILIZATION (SHOALS 1-7), shall include all costs connected with the mobilization and demobilization of all dredging plant and equipment required to complete the work to and from the project site. Sixty percent (60%) of this CLIN will be paid when scheduled mobilization work has been completed, and the remaining forty percent (40%) will be paid when scheduled demobilization has been completed. All effort associated with moving the plant and equipment within the project site shall be included in the unit price for the shoals being worked and not in the mobilization and demobilization CLIN 0001.

ITEMS 0002-0008, DREDGING WORK (SHOALS 1-7, 11’+1’), shall include the cost of removal and placement of all material and the layout and accomplishment of all work, as specified herein or indicated on the contract drawings. The movement of plant between shoals, as indicated on the contract drawings, shall be included in the unit price. The contract price per cubic yard for dredging shall be applicable to quantities in any extensions of the dredging limits except as provided Paragraph “Variations In Estimated Quantity – Dredging”. Calculated volumes for cubic yardage will be determined according to Subsection SURVEY for payment purposes.

OPTIONAL ITEM 0009, MOBILIZATION AND DEMOBILIZATION (SHOAL 8), shall include all costs connected with the mobilization and demobilization of all dredging plant and equipment required to complete the work to and from the project site. Sixty percent (60%) of this CLIN will be paid when scheduled mobilization work has been completed, and the remaining forty percent (40%) will be paid when scheduled demobilization has been completed. All effort associated with moving the plant and equipment within the project site shall be included in the unit price for the shoals being worked and not in the mobilization and demobilization CLIN 0001.

OPTIONAL ITEMS 0010, DREDGING WORK (SHOAL 8, 11’+1’), shall include the cost of removal and placement of all material and the layout and accomplishment of all work, as specified herein or indicated on the contract drawings. The movement of plant between shoals, as indicated on the contract drawings, shall be included in the unit price. The contract price per cubic yard for dredging shall be applicable to quantities in any extensions of the dredging limits except as provided Paragraph “Variations In Estimated Quantity – Dredging”. Calculated volumes for cubic yardage will be determined according to Subsection SURVEY for payment purposes.

OPTIONAL ITEMS 0011, DREDGING WORK (SHOAL 2 – DAWHOO 1, 12’+2’), shall include the cost of removal and placement of all material and the layout and accomplishment of all work, as specified herein or indicated on the contract drawings. The movement of plant between shoals, as indicated on the contract drawings, shall be included in the unit price. The contract price per cubic yard for dredging shall be applicable to quantities in any extensions of the dredging limits except as provided Paragraph “Variations In Estimated Quantity – Dredging”. Calculated volumes for cubic yardage will be determined according to Subsection SURVEY for payment purposes.

OPTIONAL ITEMS 0012, DREDGING WORK (SHOAL 3 – DAWHOO 2, 12’+2’), shall include the cost of removal and placement of all material and the layout and accomplishment of all work, as specified herein or indicated on the contract drawings. The movement of plant between shoals, as indicated on the contract

SECTION 35 20 23 PAGE 2

drawings, shall be included in the unit price. The contract price per cubic yard for dredging shall be applicable to quantities in any extensions of the dredging limits except as provided Paragraph “Variations In Estimated Quantity – Dredging”. Calculated volumes for cubic yardage will be determined according to Subsection SURVEY for payment purposes.

1.4.3. Estimated Quantities

The total estimated quantity of material necessary to be removed from within the specified limits to complete the work are as follows:

SHOAL

NO. LOCATION

REQUIRED

DREDGING PRISM

CY PL. MEAS. *

ALLOWABLE

OVERDEPTH PRISM

CY PL. MEAS. **

TOTAL CY

PL. MEAS.

BASE

Rantowles (11’+1’) 7398+00 to 7420+00

24,000

8,000

32,000

2 Dawho River 1 (11’+1’)

8284+00 to 8346+00 121,000 33,000 154,000

3 Dawho River 2 (11’+1’)

8372+00 to 8388+00 20,000 8,000 28,000

4 Watts Cut (11’+1’)

8534+00 to 8680+00 208,000 74,000 282,000

5 Fenwick Cut (11’+1’)

9055+00 to 9069+00 9,000 5,000 14,000

6 Rock Creek (11’+1’)

9281+00 to 9302+00 33,000 11,000 44,000

Ashepoo Coosaw Cutoff (11’+1’)

9313+00 to 9400+00

198,000 52,000 250,000

OPTIONS

Brickyard Creek (11’+1’) 9975+00 to 9984+00

27,000

8,000

35,000

2 Dawho River 1 (12’+2’) 8284+00 to 8388+00

33,000 35,000 68,000

Dawhoo River 2 (12’+2’)

8372+00 to 8388+00 8,000 8,000 16,000

TOTALS 681,000 242,000 923,000

NOTE:

* 1. Required depth will be as shown on the contract drawings. The required dredging prism quantities include the optional side slope material associated with the required depth.

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** 2. The allowable overdepth quantities include optional side slope materials associated with the allowable overdepth.