HomeMy WebLinkAbout20130223_RE U-2524D - Greensboro Outerloop Culvert - Back Fill_20151026Wanucha, Dave
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Wanucha, Dave
Monday, October 26, 2015 8:46 AM
Lauffer, Matthew S; David.E.Bailey2@usace.army.mil; Wilson, Travis W.; Gary Jordan
Elam, William H; Lee, Craig J; James Byrd
RE: U-2524D - Greensboro Outerloop Culvert - Back Fil)
Hi Matt,
Giv�n th� % imp�rviousn�ss upstr�am and lik�ly flashy hydrograph, if th� culv�rts ar� not buri�d, th�r� vvould b�
conc�rn with instability (outl�t scour and a p�rch�d outl�t). Would th�r� b� follow-up monitoring to d�t�rmin� if a fix
vvas n��d�d to r�pair th� p�rch�d conditions? What m�thods vvould b� us�d to fix p�rch�d conditions? Is b�drock an
155U�?
W� hav� I�ss conc�rn if th� culv�rts w�r� not backfill�d. Allowing �xisting s�dim�nt transport proc�ss�s to backfill has
m�rit. W� hav� obs�rv�d vvh�r� backfill�d mat�rial app�ar�d to b� flush�d out and r�plac�d vvith upstr�am s�dim�nt
during th� subs�qu�nt storm.
+� . . . . . . � �. �. . � �, �
In your Tabl� b�low, Culv�rt 1 s��ms a bit wid� giv�n th� �xisting str�am width. Alt�rnating baffl�s may b� n��d�d to
narrow th� chann�l (similar to Figur� 2 in th� guidanc�, b�low), unl�ss th�r� is a r�ason why th� culv�rt is 2-3 f��t wid�r
than th� str�am chann�l.
P�rhaps an on-sit� m��ting may h�lp th� discussion. It vvould b� h�lpful to obs�rv� �xisting chann�l conditions
(s�dim�nt load, b�drock, aquatic lif�).
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From: Lauffer, Matthew S
Sent: Friday, October 23, 2015 1:21 PM
To: Wanucha, Dave <dave.wanucha@ncdenr.gov>; David.E.Bailey2@usace.army.mil; Wilson, Travis W.
<travis.wilson@ncwildlife.org>; GaryJordan <garyJordan@fws.gov>
Cc: Elam, William H<belam@ncdot.gov>; Lee, Craig J<cjlee@ncdot.gov>; James Byrd <jabyrd@HNTB.com>
Subject: RE: U-2524D - Greensboro Outerloop Culvert - Back Fill
� .��;�"iil �r�1�
Aft�r som� on-going discussions with som� of you, I would lik� to gath�r input on th� n��d to backfill culv�rts for th� U-
2524D proj�ct.
Th�r� ar� som� long culv�rts on this proj�ct as id�ntifi�d b�low and shown on th� attachm�nt. IVon� of th� culv�rts
hav� high flovv barr�ls. Would you all b� vvilling to comm�nt on th� b�n�fit of burying th�s� culv�rts a foot and
backfilling with str�am-b�d mat�rial?
►
Th� location of th� culv�rts is n�ar in Gr��nsboro at th� int�rs�ction of Lawndal� and th� propos�d Gr��nsboro
out�rloop.
https://www.�oo�le.com/maps/@36.1406946,-79.8331553,18z?hl=en
� + - ,�
�
Length
Culvert ID (Feet)
Culvert 1 1430
Culvert 2A 363
Culvert 2B
Culvert 3
Culvert 4
712
1214
335
Size Slope Burial Sills
8' X 8' 1.04% 1' Yes
11'X9' I 1.86%
11'X9' 0.50%
11'X9' 0.59%
7'X8' 2.07%
Matthew (MattJ Lauffer, PE, CPM
Asst. State Hydraulics Engineer
Central Region, Divisions 5,7,8,9
Highway Stormwater Program
Hydraulics Unit
North Carolina Department of Transportation
Phone:919-707-6703
Cel (: 919-621-0443
Fax: 919-250-4108
Email: mslauffer@ncdot.�ov
Mail:
1590 Mail Service Center
Raleigh, NC 27699-1590
Delivery:
1020 Birch Ridge Dr.
Raleigh, NC 27610
1' Yes
1' Yes
1' Yes
1' Yes
Baffles
No
Yes (25 foot Centers
No
No
Yes (20 foot Centers)
Drainage
Approximate Area
Width (Square
of Stream Miles)
5-6' 0.15
Confluence of
two streams -
4-5' and 5-6' 0.38
Confluence of
two streams -
4-5' and 5-6' 0.38
10' 1.12
6-7' 0.22
From: Lauffer, Matthew S
Sent: Tuesday, September 08, 2015 10:31 AM
To: 'dave.wanucha@ncdenr.gov'
Cc: Elam, William H; Lee, Craig J; David.E.Bailey2Ca�usace.army.mil; James Byrd
Subject: RE: U-2524D - Greensboro Outerloop Culvert Summary (UNCLASSIFIED)
Dav�,
Hop� you �njoy�d your vv��k�nd. Th�s� culv�rts vvill b� singl� barr�l�d culv�rts and vvill not hav� high and lovv flovv
barr�ls. Stabilization of th� culv�rt �ntranc� and �xit vvill b� part of th� d�sign. I hav� attach�d a plan vi�vv layout of th�
culv�rt configuration for th� Lavvndal� int�rchang�. Th� plan is to backfill th� culv�rts vvith alluvial s�dim�nts that ar�
obtain�d during th� �xcavation of th� propos�d culv�rts.
I am ch�cking on th� p�rmit modification submittal dat� and vvill s�nd that as soon as I knovv.
3
.
�
��
Matthew (MattJ Lauffer, PE, CPM
Asst. State Hydraulics Engineer
Central Region, Divisions 5,7,8,9
Highway Stormwater Program
Hydraulics Unit
North Carolina Department of Transportation
Phone: 919-707-6703
Cel (: 919-621-0443
Fax: 919-250-4108
Email: mslauffer@ncdot.�ov
Mail:
1590 Mail Service Center
Raleigh, NC 27699-1590
Delivery:
1020 Birch Ridge Dr.
Raleigh, NC 27610
From: Bailey, David E SAW [mailto:David.E.Bailey2Ca�usace.army.mil]
Sent: Tuesday, September 08, 2015 8:56 AM
To: Wanucha, Dave; Lauffer, Matthew S
Cc: Elam, William H; Lee, Craig J
Subject: RE: U-2524D - Greensboro Outerloop Culvert Summary (UNCLASSIFIED)
Classification: LTNCLASSIFIED
Caveats: NONE
Hi all. IVo additional comm�nts at this tim�. Thanks for th� coordination.
-Dav� �ail�y
David E. �ail�y, PWS
R�gulatory Proj�ct Manag�r
US Army Corps of Engin��rs
CE-SAW-RG-R
3331 H�ritag� Trad� Driv�, Suit� 105
Wak� For�st, North Carolina 27587
Phon�e (919) 554-4884, Ext. 30.
Faxe (919) 562-0421
Emaile David.E.Bailey2@usace.army.mil
Th� Wilmington District is committ�d to providing th� high�st I�v�l of support to th� public. To h�lp us �nsur� vv�
continu� to do so, pl�as� compl�t� th� Custom�r Satisfaction Surv�y locat�d at
http://corpsmapu.usace.army.mil/cm apex/f?p=136:4:0.
4
From: Wanucha, Dave [mailto:dave.wanuchaC�ncdenr.QOV]
Sent: Thursday, September 03, 2015 8:38 AM
To: Lauffer, Matthew S
Cc: Elam, William H; Lee, Craig J; Bailey, David E SAW
Subject: [EXTERNAL] RE: U-2524D - Greensboro Outerloop Culvert Summary
Hi Matt,
Thanks for s�nding th� data. Th� propos�d sills and baffl�s app�ar to b� consist�nt vvith DOT°s guidanc� on th�
subj�ct. Will th�s� culv�rts poss�ss high flow barr�ls and flood plain b�nch�s, and if so, what typ� of mat�rial will b�
�
.� . �� ,� . .
Dav� �.,
Th�s� ar� th� culv�rt data of vvhich vv� spok� y�st�rday.
f��
Dave Wanucha
NC DENR Winston Salem Region Office
NC Division of Water Resources
Transportation Permitting Unit
450 W. Hanes Mill Rd, Suite 300
Winston�Salem, NC 27105
Cell (336) 403�5655
Office (336) 776�9703
Dave. Wanucha(r�ncdenr.gov
E-mail corr�spond�nc� to and from this addr�ss may b� subj�ct
to th� North Carolina Public R�cords Lavv and may b� disclos�d to third parti�s.
From: Lauffer, Matthew S
Sent: Tuesday, September 01, 2015 4:10 PM
To: Wanucha, Dave
Cc: Elam, William H; Lee, Craig J; Lauffer, Matthew S
Subject: U-2524D - Greensboro Outerloop Culvert Summary
Importance: High
H i Dave,
Per our phone conversation a couple weeks ago, I wanted to let you know what we were going to recommend for the
culverts on U-2524D near Lawndale with respect to sills and baffles.
The following is a summary of the structures and proposed configurations:
Culvert ID
Culvert 1
Length
(Feet)
1430
Size
8' X 8'
Slope
1.04%
Burial
1'
Sills
Yes
Baffles
No
Approximate
Width
of Stream
5-6 '
Drainage
Area
(Square
Miles)
0.15
Confluence of
two streams -
Culvert 2A 363 11'X9' 1.86% 1' Yes Yes (25 foot Centers) 4-5' and 5-6' 0.38
Confluence of
two streams -
Culvert 2B 712 11'X9' 0.50% 1' Yes No 4-5' and 5-6' 0.38
Culvert 3 1214 11'X9' 0.59% 1' Yes No 10' 1.12
Culvert 4 335 7'X8' 2.07% 1' Yes Yes (20 foot Centers) 6-7' 0.22
You will notice that the lengths of the culverts are long and that sills are used on all culverts and all culverts will be
buried a foot. Baffles will be placed on Culvert 2A and Culvert 4 where slopes are near 2%. Baffles will be placed across
the entire box with no additional reduction in stream width. Stream pictures are below for reference.
Please let me know if you concur with the proposal or would like to discuss further. My phone number is below.
Regards,
Matt
Stream on Culvert 1
6
Stream u/s stream of Culvert 2A
Stream U/S of Culvert 3
Stream Up stream of Culvert 4
Matthew (MattJ Lauffer, PE, CPM
Asst. State Hydraulics Engineer
Central Region, Divisions 5,7,8,9
Highway Stormwater Program
Hydraulics Unit
North Carolina Department of Transportation
Phone:919-707-6703
Cel (: 919-621-0443
Fax: 919-250-4108
Email: mslauffer@ncdot.�ov
Mail:
1590 Mail Service Center
Raleigh, NC 27699-1590
Delivery:
1020 Birch Ridge Dr.
Raleigh, NC 27610
I rr�7all �:urrc,�l�ui�dci��;e, �C�u ai�d ��rurr�7 �U°ii� �e,i�dcr i� �ul�j��;� �u �C�h°ie, I"J � I�'�"ul�li�; I ta�:ur�:;� I..aw ai�d ir�7ay I�c rli��;lu�e,rl �u �C�h°ih�rl I�artie,�,
Classification: LTNCLASSIFIED
Caveats: NONE
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NUMBE0. OF eA�FLES-i
ON iR CENTERS FROM DOWNSTREPM SILI
Figure 2- Silis and eaffles used to create a low flow channel through culvert
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