20021259 Ver 1_Staff Comments_20021003

[Fwd- Deep Creek Mitigation Bank]
Subject: [Fwd: Deep Creek Mitigation Bank]
Date: Thu, 03 Oct 2002 11:32:42 -0400
From: "Todd St. John" <todd.st.john @ncmail.net>
Organization: DWQ Wetlands Unit
To: Jennifer Frye <Jennifer.Frye @ncmail.net>
Pete J brought in some plan to me today... the answers seem adequate and
the rest seems good... i have attached a draft 401 if you want to
issue... if not let me know and we'll issue
Subject: RE: Deep Creek Mitigation Bank
Date: Tue, 1 Oct 2002 13:27:26 -0400
From: "Peter" <Jelenevsky @sandec.com>
To: "'Todd St. John "' <todd.st.john @ncmail.net>
Todd,
I can e -mail the drawing if you would like. But the files are fairly
large, therefore; they may need to be sent individually.
Peter
- - - -- Original Message---- -
From: Todd St. John [ mailto:todd.st.iohn @ncmail.net]
Sent: Tuesday, October 01, 2002 1:14 PM
To: Peter
Subject: Re: Deep Creek Mitigation Bank
weren't you gonna send me some plans, too? if so i have some free prog
to
read auto cad files... if that is helpfull...
Peter wrote:
> Todd,
> This e -mail is in response to your questions regarding the stream
> restoration plan proposed for the Deep Creek Mitigation Bank that we
> visited last Wednesday, September 25, 2002. I have responded to the
> question in the order in which they were received below.
> 1) All of the shaded areas depicted on figure 4 of the proposed
stream
> mitigation plan, which highlights the wetland restoration and creation
> areas that will be planted with bare root seedlings and available
> transplants. Trees will be planted on an 8 -foot by 8 -foot spacing,
> resulting in approximately 600 seedlings per acre. The wetland
> restoration component of the mitigation plan was addressed in the
> Mitigation Banking Instrument, therefore I did not elaborate on the
> proposed wetland mitigation plan beyond the proposed footprint.
> 2) The drawing has been modified and depicts the footers to be
the
> same size as the top rocks. I will be sending copies of the modified
> figure to your office.
> 3) Although no blocks are going to be constructed, proposed
> impervious dikes will be utilized to facilitate the pump around of
base
> flow within the channel when work occurs within the current channel.
1 of 4 10/7/2002 9:40 AM

[Fwd: Deep Creek Mitigation Bank]
> Following the completion of the pumping procedures, the dikes will be
> left in place and the old channel sections will be backfilled with the
> borrow excavated from the new channel alignment. A detail depicting
the
> impervious dike structure will be sent to you.
> 4) The proposed channel slope is 0.00289 from station 4 +88a to
> 14 +55a (Reach 3) (riffle to riffle) and the proposed valley slope
> following the construction of the bankfull bench will be .0038 from
> station 4 +88a to 13 +65a. I have excluded the step -pool section
located
> between stations 14 +55a and 15 +87a from the slope calculation. If you
> measure the proposed channel length and divide by the valley length
the
> sinuosity ends up being 1.35 if you divide the valley slope (bankfull
> bench slope) by the stream slope the sinuosity is 1.31. Based on the
> re- calculations the valley slope was incorrectly calculated for reach
3,
> therefore; it should be 0.0038 versus 0.0030.
> 5) I used the average values of all three reaches when
determining
> the sediment transport and entrainment for the existing and proposed
> channels.
> 6) Yes, American Wetlands will hold the easement until the
> monitoring period is over and the agencies sign off on the success
> criteria. Subsequently, the Piedmont Land Conservancy will retain the
> easement. The acceptance letter from the Piedmont Land Conservancy is
> located in Section 9 of the Stream Restoration Plan.
> 7) The base flow pipe (center pipe) will be buried approximately
6
> to 12 inches below the proposed channel invert. The figure depicting
> the crossing will be modified to show this adjustment and subsequently
> forwarded to you.
> I hope to have all of the figures and sheets modified by Wednesday and
> will probably deliver them to your office myself on Thursday. If you
> have any other questions or comments e -mail me or call me on my mobile
> at 919 - 280 -0603.
> Peter
> - - - -- Original Message---- -
> From: Todd St. John (mailto: todd. st. john @ncmail.net] __._._ , .. _
> Sent: Tuesday, September 03, 2002 12:52 PM
> To: Jennifer Frye; [e-mail]
> Cc: dave.penrose
> Subject: Deep Creek Mitigation Bank
> Jennifer, i guess it will just be you, me and Pete J. on the 6th
> (Friday) for
> the Deep Creek site only. He will email you our meeting location and
> time as
> i will just be a happless passenger in Pete's vehicle... Maybe we can
> look at
> the Wal -Mart Kernersville relocation site on the way back?
> Anyway, Pete, I reveiwed the plan and have some questions... Jennifer
> may
> also have questions, but I don't think she has received a copy of the
> plans
2 of 4 10/7/2002 9 40 AM