HomeMy WebLinkAbout15-01-14 Item 3 - Cheyenne 30 Day Update - HC Staff Report 4�gW vpRr
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Harbor Commission Staff Report Agenda Item No. 3
January 14, 2015
TO: HARBOR COMMISSION
FROM: Public Works Department
Chris Miller, Harbor Resources Manager
949-644-3043, cmiller@newportbeachca.gov
TITLE: Cheyenne 30-Day Update (December& January)
ABSTRACT:
Per the Harbor Commission's direction at the November 2014 meeting, the Commission will
review the 30-day update for the vessel Cheyenne as submitted by Mr. Chris Welsh.
RECOMMENDATION:
1. Receive and file.
FUNDING REQUIREMENTS:
There is no fiscal impact related to this item.
ENVIRONMENTAL REVIEW:
Staff recommends the Harbor Commission find this action is not subject to the California
Environmental Quality Act ("CEQA") pursuant to Sections 15060(c)(2) (the activity will not result
in a direct or reasonably foreseeable indirect physical change in the environment) and
15060(c)(3) (the activity is not a project as defined in Section 15378) of the CEQA Guidelines,
California Code of Regulations, Title 14, Chapter 3, because it has no potential for resulting in
physical change to the environment, directly or indirectly.
NOTICING:
The agenda item has been noticed according to the Brown Act (72 hours in advance of the
meeting at which the Harbor Commission considers the item).
Submitted by:
ris Miller
Miller, Chris
From: Chris Welsh <fivedives@gmail.com>
Sent: Monday, December 15, 2014 9:25 AM
To: Miller, Chris
Subject: Re: Cheyenne 30 Day Update
Chris - we currently are working to get the final grind/polish tool made.
For the final step, a male mold of the ideal shape is made,then a sheet of glass is heated to a soft stage and
slumped over the mold. The resulting glass form is then lined with abrasive, bonded to a shaft, and oscillated
back and forth while the dome rotates beneath it. This creates a perfect spherical shape. Normally, creating the
tool is an easy deal, however due to the size and tight radius of the dome, the slump forming is expected to take
several tries as the glass tends to get "bunchy" around the bottom edge and that is not acceptable. Think of how
a table cloth over a round table top looks around the bottom edge. The process has been underway for the last
week.
This is the latest series of photos taken Thursday. There is still extra material on top; that will be removed now
to be ready for the final grind tool.
Have a good holiday.
Chris Welsh
+1 949 278 2012 cell
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Miller, Chris
From: Chris Welsh <fivedives@gmail.com>
Sent: Wednesday, January 07, 2015 7:09 PM
To: Miller, Chris; David Girling
Subject: Re:January Report Past Due
Chris & Dave-we are working to secure the tool used for the final polish of the dome.
Usually,the tool is made by slumping (draping a piece of glass that has been softened in a kiln over a mold of the specific
radius), and the slumped glass is put against the article to be finished.The actual polishing is accomplished by pumice
between the two surfaces.The tight radius of the dome (18") as opposed to the typical radius of a telescope lens is
preventing the shop that normally does this from producing the part properly. We got this news on January 5th.
Since the normal solution is not available, the alternative is roll forming a aluminum dome of the proper radius, lining it
with abrasive ceramic stones, and completing the polishing this way. We have just put this need out to bid, so I do not
have a timetable for production. It should not be a unusual part to make; the main issue will be getting into the
production line at the machine shop.
I am traveling to Flagstaff next Wednesday and Thursday to inspect the progress and will forward more information on
the dome itself at that time.The current critical path item is the necessary tool. I will see if I can have photos sent over
in the AM.
Best regards,
Chris Welsh
+1 949 278 2012 cell
http://www.deepsubllc.com
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