Excavation and backfilling specifications, 10th Ave Tunnel

NYC 9/11 Public Portal Document

F. No water may be diverted from the construction site into the existing tunnel at 32nd Street or into the existing yard east of the 10th Avenue Bridge. The Contractor shall submit his proposed methods of controlling and disposing of water to the Engineer for approval prior to the start of excavation. 3.06 EXCAVATION A. General jl

1. Perform alr.excavations of every,description of, aj11 materials that are | i not provided for under other sections of these Specifications. ExcavationsfShall be made to the lines, grades, thicknesses, and typical; sections specified herein or shown on the; Drawlngsw J 2. Excavated materiali not required for use as backfi11,fshalIbecome the. •1 ' property of the Contractor and shall be disposed of off the jobsite.. 8 3,, Provi^e'sufficient clearance for proper execution of concrete work. a Make allowance for sheet; piling!and formwork wjiere required,, and for .-J Inspection of the workU ' - 7® I; ■I! 4. During excavation^ store the material suitable for backfilling as shown ’.j ■^Ir i on the Drawings or as approved by the Engineer. Dispose of ] unsatisfactory and excess material away from the site at the expense and. responsibility of the Contractor. - ■ ■ ■ ■’ .•’••Ob'. 'A I ni •' ‘-'Y I b. Unauthorized,, Excavation;,.... 1. Uiiauthorixe^ exciYaUon.consists; of removal of materials beyond the limits'Specifled herein or shown on the Drawings. ' f '^1 i i 2. Under, Structural footings:,Andn^undation bas^, fill ^authorized ‘d , excavatIon by;extending the. Indicated bottora|elevatlon of the footing or J t baseto'the excavationbottom, without altering required top elevation. Concrete fill of the same type specified for the footing or structural base shall be used to bring bottom elevations; to .level and proper position, rr.Zrv 7-.' ■ 3. Elsewhere* backfill and. compact-unauthorized;excavations as specified I for adjacent authorized excavations, unless otherwise directed by the | Engineer.>1. ' • Y' r <■ • • 1 4. All additional I concrete fl ll-o.r earth backfill-, requiredas/aresultof • r -unauthorized excavations,shall,.be provided by the Contractor at no addltlona.i;cost to,tj)e ^thorlty.; .- , ! C. Stability Of Excevations: ■ '• , 07 vnfe no ’ ’m. s.-: ! Y 7. ■ •. ’■' 1 1. Where; thejsldes; of excavations are sloped,, angle of?slopes; shall be+as approved by the.Engineer and shall not be steeper than allowed by the Title 29 Code of Federal Regulations, Part 1926, Safety and Health Regulations for Construction (OSHA).

4 ■ Contract 02220-5 Excavation and 1-02-21064-0-0 Backfilling 1 If NYC-WTC_000165812