Subproject: Site Preparation (SP-5) 



Disturbing Activity: Clearing, grading 



The usual method of site preparation for a platform fabrication 

 yard would involve complete clearing and grading of the work, stor- 

 age and building areas. The working areas would be leveled to a 

 maximum gradient of three percent. Much of the site is left bare 

 or partially surfaced. A buffer strip to reduce noise, improve appear- 

 ance and filter runoff is determined by the amount of available land 

 and other factors. 



Subproject: Site Development (SP-6) 



Disturbing Activity: Fill removal, deposition 



If there is to be extensive shoreline bulkheading, or if spot filling 

 of low areas or general filling is needed to raise the land above flood 

 hazard levels, a considerable amount of backfill may be needed from off- 

 site locations. Therefore, large volumes of fill material may be required 

 (unless graving dock excavation provides an excess of high quality fill 

 material) posing the threat of bay dredging. On-site roads and building 

 foundations occupy small areas and are a minor concern in assessing a yard' 

 effects on fish and wildlife following the initial loss of habitat result- 

 ing from yard construction. 



Subproject: Artificial Waterways (SP-7) 



Disturbing Activity: Excavation 



A subject of major concern is the possibility of excavation of a 

 graving dock within the site for fabrication of large steel platforms. 

 The graving dock could be up to 2,000 feet long, 600 feet wide, and 40 

 feet deep [19] and produce more than 2 million cubic yards of excavated 

 material. The graving dock would be furnished with lock gates so that it 

 could be pumped dry during construction, then flooded to float out a steel 

 platform too large and cumbersome to be moved on land. 



Subproject: Roadways and Bridges (SP-8) 



Disturbing Activity: Roadway design 



In general, good road and rail access e^re principal requirements for 

 platform fabrication yards. Highways are used mainly for commuter traffic 

 and delivery of supplies, materials, and fuels. Rail or truck transport 

 may deliver large, heavy shipments of steel to the yard. Since the yard 

 requires a waterfront site, road and rail alignment and design are '^ery 

 important considerations for reducing effects on the coastal areas. 



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