Document ID: EPA-HQ-OW-2002-0049-0020
Agency: epa
Document Type: Supporting & Related Material
Title: 
Posted Date: 2003-03-19T05:00Z

From: Elmosa [elmosa@imasar.com]
Sent: Monday, August 19, 2002 1:38 PM
To: Sunda, John B.
Subject: Re: InvisiHead - Thank You

Dear John,
There are so many variables that will not, in this stage, help us to zoom in on
refined cost estimates; however, as a guideline indication, we can make
reasonable assumptions.

Water Environments:
The cost of carbon steel systems is about 20-30% less than ss for fresh water
but nearly the same for seawater (about 5% less) due to the elaborate coating
for corrosion protection.

Mobilization Costs:
Type and no. and size of equipment to be brought to the site including barges,
cranes, etc. are dictated by the  size and no. of InvisiHead pcs. and whether
the job is for a new system or a retrofitting process. That is why you see a
fairly large span of the range.

Other Costs:
Engineering is included but contingencies are not since they are geo-variable
and location related, they are dealt with on case-by-case basis

Good luck and best regards
Mo Elarbash

"Sunda, John B." wrote:

> Dear Mo,
> Thank you for your prompt and detailed response to my questions.  This data
> will provide the majority of what I need for the cost estimates.  After
> reviewing the information provided, I have the following clarifying
> questions:
>
> *       I had originally intended to develop separate costs for saltwater
> versus freshwater installations based on differences in materials of
> construction and/or other requirements.  My interpretation of the
> information you provided, is that the cost are for stainless steel equipment
> that is suitable for saltwater (corrosive) environments.  Are the costs for
> using coated carbon steel (freshwater environments) significantly lower?  If
> so, can you provide similar equipment costs or a relative cost factor?
>
> *       The mobilization costs are presented as a range.  What factors drive
> this cost to the higher or lower value?
>
> *       I intend to add indirect costs of 10% (of total direct costs) for
> engineering and 10% for contingencies?  I'm not sure what is included in
> your costs and wonder if these additional cost factors (or others) should be
> applied and whether they seem reasonable to you?  Note that we tend to err
> on the high side unless the costs seem excessive.
>
> Again Thanks,
>
> John Sunda
> Science Applications International Corporation (SAIC)
> 11251 Roger Bacon Drive
> Reston, Virginia 20190
> Voice - 703-318-4607
> Fax - 703-318-4646
> john.b.sunda@saic.com
>
> > -----Original Message-----
> > From: Elmosa [SMTP:elmosa@imasar.com]
> > Sent: Friday, August 09, 2002 7:07 PM
> > To:   JOHN.B.SUNDA@saic.com
> > Subject:      InvisiHead
> >
> > Dear John,
> >
> > I highly appreciate your interest in the InvisiHead. I would have
> > responded earlier but your message came through the general email address
> > and not the Elmosa address elmosa@imasar.com.
> >
> > There are so many variables as you mentioned in your message that would
> > contribute to raising or lowering the costs, however, I am going to give
> > you an indication that would help you in your work. We are using for the
> > cost parameters, in this case, the Great Lakes as  the location for the
> > intake systems. The costs are nearly linear for the capacities you
> > indicated. Mobilization and demobilization costs are nearly fixed. For the
> > matter of redundancy and continuity of operation we usually design our
> > intake system of multiple pipes and intake heads unless capacities are too
> > small to justify the approach. Here is the indicative costs (delivered):
> >
> > 5,000 gpm      1 head  @ $30,000
> > 10,000 gpm    1 head  @ $30,000
> > 25,000 gpm    1 head  @ $40,000
> > 50,000 gpm    2 heads @ $35,000 ea.
> > 100,000 gpm  2 heads @ $80,000* ea.
> > 200,000 gpm  4 heads @ $80,000 ea.
> > 350,000 gpm  4 heads @ $106,000 ea.
> >
> > *This is the most recent price for stainless steel structure I got from
> > Fabrication Department for a recent work. If you need more fine-tuned
> > prices please let me know. I will try to get better figures from
> > Fabrication.
> >
> > Installation per head is about $35,000. Mobilization is about
> > $15,000-$30,000 for all types of InvisiHead installation jobs whether for
> > an existing structure or a new one including diving, cutting, welding,
> > etc.
> > Installation time ranges between 2-7 days.
> >
> > The InvisiHead virtually requires no maintenance. Its progressive staging
> > of the flow acts as an entrance self cleaner so as to remain continuously
> > fully open to deliver the required flow capacities at all times with
> > highly clean water.
> >
> > However, for retrofitting of existing structure, we simply have to design
> > the proper InvisiHead to fit each structure. We do turn key jobs around
> > the world. The costs may go down substantially if a number of jobs becomes
> > available at a fairly close time intervals.
> >
> > The location usually dictates what type of material to be used and how
> > heavy the structure should be. Wave action, depth, and submarine currents
> > play major roles in the engineering of the system. The InvisiHead creates
> > through its progressive flow stages a good degree of shock absorption and
> > flexibility to let the high speed currents through during stormy
> > conditions. This is one the features that helped us reduce the weight and
> > material used in fabrication. We use carbon and stainless steel as well as
> > FRP's in the construction. Although the InvisiHead is hydraulically immune
> > to be blocked by Zebra Mussels, it can be constructed of Mussel repellent
> > alloys. The costs are not much different for salt water since carbon steel
> > costs become about the same as stainless steel when done with rust
> > proofing. FRP's also get costly when stability becomes a major factor in
> > the open seas. For fresh water CS is a cheaper choice for larger
> > structures, FRP's become cheaper for smaller heads.
> >
> > Should you need any further information please let me know.
> >
> > Regards
> > Mo Elarbash
> > 905-760-9039
> > 416-609-1439
> >
> >
> >
> >
> > --
> > _______________________________________
> > Please visit us at <http://www.imasar.com/elmosa> ! Thank you
> >

--
_______________________________________
Please visit us at http://www.imasar.com/elmosa ! Thank you