A5 Attachment 6 Revised Section 31 24 20 Cement-Bentonite Wall Spoils_ Zone 5A Material.pdf

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Big Sandy Dam Reservoir Enlargement
Solicitation number
140R4020R0015
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This document provides specifications for placing cement-bentonite wall spoils for the Big Sandy Dam Reservoir Enlargement project solicited by the Bureau of Reclamation. The specifications require the contractor to obtain Zone 5A excavated material from the cement-bentonite cutoff wall trench and place it on the upstream slope of the dike in an even distribution to fill the shown volume. The material must fill voids but not exceed the amount determined by the Contracting Officer's Representative. The contractor must place the material using approved equipment and compact it with one pass of tracked equipment.

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Big Sandy Dam Reservoir Enlargement Eden Project, Wyoming Solicitation No. 140R4020R0015

Placing Cement-Bentonite Wall Spoils, Zone 5A Material

31 24 20 - 1

SECTION 31 24 20

CEMENT-BENTONITE WALL SPOILS, ZONE 5A MATERIAL

PART 1 GENERAL

1.01 MEASUREMENT AND PAYMENT

A. Cost:

1. Include in square foot unit price offered in the Price Schedule for Cement-

Bentonite Cutoff Wall.

PART 2 PRODUCTS

2.01 ZONE 5A MATERIAL

A. Obtain from materials excavated for cement-bentonite cutoff wall trench in accordance with Section 31 56 20 – Cement-Bentonite Cutoff Wall.

PART 3 EXECUTION

3.01 PREPARATION

A. Verify with COR the location and limits of Zone 5A material to be placed.

3.02 PLACING ZONE 5A MATERIAL

A. Place cement-bentonite wall spoils, Zone 5A material on upstream slope of dike at location shown on drawings and as directed by COR.

B. Place so that material is evenly distributed and fills the volume shown on drawings.

1. Include material in an amount to fill voids, but not in excess of an amount determined by the COR.

C. Do not place and compact soil under following conditions:

2.1. Ice, frost, or snow pockets are visible in soil being placed or in underlying materials.

C.D. Place in a manner using equipment as approved by COR.

3.03 COMPACTION

A. Compact using one pass of tracked equipment.

Big Sandy Dam Reservoir Enlargement Eden Project, Wyoming Solicitation No. 140R4020R0015

Placing Cement-Bentonite Wall Spoils, Zone 5A Material

31 24 20 - 2

END OF SECTION

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