20021259 Ver 1_Staff Comments_20021001

RE: Deep Creek Mitigation Bank
Subject: RE: Deep Creek Mitigation Bank
Date: Tue, 1 Oct 2002 13:27:26 -0400
From: "Peter" <Jelenevsky @ sandec.com>
To: "'Todd St. John"' <[e-mail]>
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. john@ncmail. net I
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.
> 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
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RE: Deep Creek Mitigation Bank
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 (mail to:[e-mail] I
> 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
> yet... so...
> 1) The site plan should show the extent and nature of the planting
plan.
> 2) The footer rocks for the cross vanes should be as large as the
header
> rocks...
> 3) Channel block detail should be provided at the point where the
> proposed
> channel crosses the existing channel.
> 4) The channel and valley slopes and the sinuosity for reach 3 apears
to
> be
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RE: Deep Creek Mitigation Bank
> in conflict (probably a typo).
> 5) The sediement transport analysis data does not seem to correspond
to
> the
> data in the morpological measurments table.
> 6) Is the banker the one proposed to hold the easement on this?
> 7) How will the proposed crossing provide aquatic life passage?
> Jennifer Frye wrote:
> > Todd and Dave,
> > I could tag along (but only for the Yadkin site) this Friday (6th)
and
> > Wednesday (11th).
> > Hope you are both doing well.
> > Jen
> > "Todd St. John" wrote:
> > > At the same time we visit the Deep Creek site in Yadkin County I
> wanted
> > > to go look at the Warrior Creek site in Wilkes County... Please
let
> me
> > > know if you would be available to do both...
> > Jennifer Serafin Frye
> > Division of Water Quality
> > NC Department of Environment and Natural Resources
> > Winston-Salem Regional Office
> > Winston-Salem, NC 27107
> > Voice: 336-771-4608 ext. 275 Fax: [phone]
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