Amendment 0003_h - 00 90 04 WENTWORTH SCALE.pdf
PDF 166 KB Posted
- Solicitation number
- W912DS24B0003
About this file
This document is an amendment to a section of specifications related to a federal contract opportunity for maintenance dredging and beach nourishment of the Fire Island Inlet and Shores Westerly to Jones Inlet Beach Erosion Control and Navigation Project in New York.
The key details of the federal contract opportunity are: The U.S. Army Corps of Engineers proposes to dredge approximately 700,000 to 1,000,000 CY of sand from the Fire Island Inlet Federal Navigation channel and deposit it as nourishment along the Gilgo Beach in Suffolk County, New York. The dredging is to a depth of 14 feet plus 2 feet of allowable over-depth. The purpose is to maintain the navigation channel and provide beach nourishment. The work is estimated to cost between $15,000,000 and $50,000,000. Plans and specifications will be available in March 2024, with a bid opening in April 2024 and a contract award anticipated in May 2024. The contractor will be required to commence work within 5 calendar days of the notice to proceed and complete the work within 97 calendar days, maintaining an integrated production rate of at least 13,500 CY per day. Liquidated damages of $2,390 per day will be assessed for delays.
View the file
Other files
Show 40 more
Latest 50 of 56 listed here. See the rest on GovTribe.
On GovTribe
Work with this file
- Download the original file
- Contacts named in this file
- Similar government files
- Ask GovTribe AI about this file
Text version
Fire Island Inlet and Shores Westerly to Jones Inlet, NY- Navigation
SECTION 00 90 04
WENTWORTH SCALE
06/17
PART 1 GENERAL
1.1 DESCRIPTION
Wentworth scale
PART 2 PRODUCTS
Not Used
PART 3 EXECUTION
Not Used
-- End of Section --
DOCUMENT 00 90 04 Page 1
00 90 0 -1
COMPOSITE GRAIN SIZE DISTRIBUTION CURVES FOR SAND SEDIMENTS AND
GRAIN SIZE SCALES FOR SEDIMENT
The grade scale most commonly used for sediments is the Wentworth (1922) scale which is a logarithmic scale in that each grade limit is twice as large as the next smaller grade limit. The scale starting at 1mm and changing by a fixed ratio of 2 was introduced by J.A. Udden (1898), who also named the sand grades we use today.
However, Udden drew the gravel/sand border at 1 mm and used different terms in the gravel and mud division. For more detailed work, sieves have bee constructed at intervals 2 ^(1/2) and 2^(1/14). The (phi) scale, devised by Krumbein, is a much more convenient way of presenting data than if the values are expressed in millimeters, and is used almost entirely in recent work.
WENTWORTH SCALE
File details come from the government source that posted it. Updated .