20101017 Ver 1_Email_20110119

Wrenn, Brian
From: Hemphill, Jeffrey L [e-mail]]
Sent: Wednesday, January 19, 2011 8:48 AM
To: Wrenn, Brian
Subject: FW: U-2550B
Brian
Here is the Hydro Engineer's response to your questions Jeff
-----Original Message-----
From: Morgan, Stephen R
Sent: Wednesday, January 19, 20118:44 AM
To: Hemphill, Jeffrey L
Cc: Nottingham, Andrew T
Subject: RE: U-2550B
1...There's no practical way to route high flows around the job site. Geometric constraints do not provide enough room, and
until the existing culvert is removed, there is no logical tie-in back to the existing stream.
2...The new channel will be stabilized with rip rap along the banks and slopes. The vegetated benches will be matted,
anchored, and planted prior to diverting flow into the channel.
-----Original Message-----
From: Hemphill, Jeffrey L
Sent: Tuesday, January 18, 20111:04 PM
To: Morgan, Stephen R
Subject: FW: U-25508
Stephen
Can you answer Brian's questions?
Thanks
Jeff
-----Original Message-----
From: Wrenn, Brian
Sent: Tuesday, January 18, 2011 12:08 PM
To: Hemphill, Jeffrey L
Subject: RE: U-25508
Couple of questions on the phasing plan:
1) any thought to overflow structures in case of high flows during phasing?
2) am I right to assume that the plan is to stabilize the new channel with vegetation prior to diverting flow into it?
Thanks,
Brian
Brian Wrenn
Transportation Permitting Unit, Supervisor INC Division of Water Quality brian.wrennPncdenr.gov
585 Waughtown Street
Winston-Salem, INC 27107-2241
336-771-4952 (Winston-Salem no.)
336-771-4631 (Fax)
or
1650 Mail Service Center
Raleigh, NC 27699-1650
919-807-6432
919-807-6494(Fax)
-----Original Message-----
From: Hemphill, Jeffrey L [mailto:[e-mail]]
Sent: Tuesday, January 18, 201111:43 AM
To: Wrenn, Brian
Subject: U-25508
Brian
This the proposed culvert removal sequence from Hydro & Roadway - I've asked to be notified if there are any changes to this
plan Jeff Hemphill NEU
Email correspondence to and from this sender is subject to the N.C. Public Records Law and may be disclosed to third parties.
U25S0B EXISTING CULVERT REMOVAL SEQUENCE
noes Dike (ha_)
CROSS SECTION
(Not to SGele)
na
Trlple_Barrel Culvert
FIDJOplolu
??Dlverle0 Flov
1. Install erosion control devices.
2. Install impervious dike and direct flow to eastern barrel.
iws Dike (1yp.)
CROSS SECTION
1 Not to $.oo)
Eastern Cone/
Bowel
a Cervtoue Otte DiverlW Flov
les Jo cube't
entrilme, only)
3. Excavate existing roadway fill beneath bridge down to culvert.
4. Remove western two barrels.
5. Excavate western side of channel. Filter pumped effluent with silt bags.
6. Stabilize bridge slopes and channel with rip rap.
CROSS SECTION
(Not to 5C.W
r e
Flog pl,ln
01ve'Je0 Flow /mtervlws Dlke
7. Use impervious dike to divert wafer to new channel.
8. Remove remainder of culvert. Filter pumped effluent with silt bags.
9. Construct remainder of channel and stabilize with rip rap.
CROSS SECTION
(Not to Scowl
FlaooPlaln - _
Normol Flow
10. Complete all work and remove impervious dikes.
11. Remove erosion control devices.
Wrenn, Brian
From: Hemphill, Jeffrey L [e-mail]
Sent: Tuesday, January 18, 2011 11:43 AM
To: Wrenn, Brian
Subject: U-2550B
Attachments: U2550B_Culvert_Removal_Sequence.pdf
Brian
This the proposed culvert removal sequence from Hydro & Roadway - I've asked to be notified if there are any changes to this
plan Jeff Hemphill NEU
Email correspondence to and from this sender is subject to the N.C. Public Records Law and may be disclosed to third parties.
Wrenn, Brian
From: Hemphill, Jeffrey L
Sent: Wednesday, February 02, 2011 11:08 AM
To: Wrenn, Brian
Subject: RE: U-2550B
Brian
Here is a response from Roadside Environmental to your second question:
Stephen,
After looking at the stream re-establishment section at the culvert removal site, I discussed
it with Barney Blackburn again. When the previous comment was sent, we didn't realize that
'new' stream section was going to be mostly underneath a new bridge. Planting any kind of
trees here would be impractical. From the details, it appears that only the benches are
vegetated; all the slopes are riprapped. So, we recommend using our native seeding and
mulching mix along with coir fiber matting to establish a grassy vegetated bench.
Let me know if you have questions. Thanks.
Mark Staley
Jeff Hemphill
NEU
-----Original Message-----
From: Wrenn, Brian
Sent: Tuesday, January 18, 2011 12:08 PM
To: Hemphill, Jeffrey L
Subject: RE: U-2550B
Couple of questions on the phasing plan:
1) any thought to overflow structures in case of high flows during phasing?
2) am I right to assume that the plan is to stabilize the new channel with vegetation prior
to diverting flow into it?
Thanks,
Brian
Brian Wrenn
Transportation Permitting Unit, Supervisor NC Division of Water Quality
brian.wrennQancdenr.&ov
585 Waughtown Street
Winston-Salem, NC 27107-2241
336-771-4952 (Winston-Salem no.)
336-771-4631 (Fax)
or
1650 Mail Service Center
Raleigh, NC 27699-1650
919-807-6432
919-807-6494 (Fax)
1
-----Original Message-----
From: Hemphill, Jeffrey L Finailto:ihemphill(@ncdot.eovl
Sent: Tuesday, January 18, 2011 11:43 AM
To: Wrenn, Brian
Subject: U-25508
Brian
This the proposed culvert removal sequence from Hydro & Roadway - I've asked to be notified
if there are any changes to this plan Jeff Hemphill NEU
Email correspondence to and from this sender is subject to the N.C. Public Records Law and
may be disclosed to third parties.
2