Attach 3.CS 24-Amend2-Drainfill P67.pdf

AG-3D47-S-10-0001

Amendment No. 2 Attachment No. 3

Geotextile, Access Road, CS 95.

D. Subsidiary Item, Road Paving, C33 Size 1, Class III

(1) This item shall consist of furnishing and installing rock paving on the Temporary Construction

Access Roads and the Stabilized Construction Entrance as shown on the plans for Goat Site 1.

(2) The paving material shall be crushed limestone conforming to ASTM C33 grading requirements, Table 2, Size 1.

(3) No separate payment will be made for this item. Compensation will be included in the respective payments for:

Bid Item 3, Bid Schedule A, Stabilized Construction Entrance, CS 5;

Bid Item 4, Bid Schedule A, Temporary Construction Access Roads, CS 5.

E. Subsidiary Item, Drainfill, C33 Size 57, Class III

(1) This item shall consist of furnishing and installing coarse aggregate drainfill for the Limestone

Ponds at Goat Site 1 and the Highwall Drain at Beulah Chapel Site 1 as shown on the plans.

(2) No separate payment will be made for this item. Compensation will be included in the payments for:

Bid Item 10, Bid Schedule A, Limestone Ponds, Drainfill C33 Size 1, Class III, CS 24;

Bid Item 6, Bid Schedule B, Highwall Drain, 12-Inch HDPE Pipe, Perforated, CS 44;

F. Subsidiary Item, Drainfill, C33 Size 57, Sandstone, Class III

(1) This item shall consist of furnishing and installing coarse aggregate sandstone drainfill for the

Mine Adit Seals at Beulah Chapel Site 1 as shown on the plans.

(2) No separate payment will be made for this item. Compensation will be included in the payments for:

Bid Item 12, Bid Schedule B, Mine Adit Seal, CS 45.

NRCS November 2009 WV Deckers Creek Acid Mine Drainage Treatment Project Goat Site 1 & Beulah Chapel Site 1 24-6

AG-3D47-S-10-0001

Amendment No. 2 Attachment No. 3

G. Subsidiary Item, Drainfill, Rock Sediment Dams, C33 Size 57, Class III

(1) This item shall consist of furnishing and installing the drainfill zones of each Rock Sediment

Dam as shown on the plans for Goat Site 1.

(2) The drainfill zone against the earthen core of each Rock Sediment Dam shall be placed after each

24 to 30-inch course of rock riprap. The drainfill shall be manually worked into the voids of each course of rock riprap adjacent to the drainfill zone.

payment for:

Bid Item 15, Bid Schedule A, Rock Sediment Dams, CS 61.

H. Subsidiary Item, Drainfill, Headwall Subgrade, C33 Size 57, Class II

(1) This item shall consist of furnishing and installing the subgrade for each precast concrete headwall as shown on the plans for Goat Site 1.

(2) The headwall subgrade shall be installed in two 6-inch lifts, minimum. Each lift shall be compacted with two passes of a manually-directed vibratory compactor.

Bid Item 20, Bid Schedule A, Precast Concrete Headwall, 48-inch HDPE Culvert, CS 432;

Bid Item 21, Bid Schedule A, Precast Concrete Headwall, 60-inch HDPE Culvert, CS 432.

I. Subsidiary Item, Drainfill, C33 Size 57, Class II

(1) This item shall consist of furnishing and installing the drainfill for the 18-inch HDPE Culvert for the West Virginia Department of Highways on County Route 72 as shown on the plans for

Beulah Chapel Site 1.

(2) The trench drainfill shall be installed in 6-inch lifts, maximum. Each lift shall be compacted with two passes of a manually-directed vibratory compactor.

(3) No separate payment will be made for this item. Compensation will be included in the respective

Bid Item 20, Bid Schedule B, Culvert, 18-inch HDPE for WVDOH, CS 44.

NRCS November 2009 WV Deckers Creek Acid Mine Drainage Treatment Project Goat Site 1 & Beulah Chapel Site 1 24-7