20041060 Ver 4_Email_20090723

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Ridings, Rob 0 Cl
From: Murray, Christopher A
Sent: Thursday, July 23, 2009 2:00 PM
To: Alsmeyer, Eric C SAW; Ridings, Rob
Cc: Bowman, John W; Jernigan, Dennis W; Miller, Eben T; Allen, Jeffrey D
Subject: Widening of Miami Boulevard from INC 54 to Davis Drive in Durham County (R-2904)
Reference: USACE Action ID No. 200220393 and 200421561
NCDENR-DWQ Project No. 20041060
Eric and Rob,
An issue on this project has come to my attention that involves placement of fill material in a jurisdictional (perennial)
stream that exceeded the permitted footprint. Construction at Site 2 (near 52+62 Lt) was to only involve installation of a
pipe system (involving a 36 inch pipe structure) that resulted in the placement of fill in the upper-most portion of UT to
Burden's Creek in the Cape Fear River Basin. Twelve linear feet of rip rap was to be installed on the streambanks only
immediately downstream of the pipe outlet. An existing 16 foot long 18 inch pipe structure conveyed the stream to the
west of this location under an existing gravel road. This 18 inch pipe was to be upsized to a 36 inch pipe structure and
replaced by others (i.e. non-NCDOT). There was a total permitted loss of 49 linear of this stream. This is depicted below:
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Ridings, Rob
From: Murray, Christopher A G C? (loco d
Sent: Friday, September 25, 2009 4:36 PM
To: Ridings, Rob U J
Cc: Allen, Jeffrey D; Miller, Eben T; Pearson, Donald R
Subject: Construction of PFSHs on R-2904 in Durham County 1
Reference: Widening of NC 54 from SR 1999 (Davis Drive) to SR 1959 (Miami Boulevard) in Durham County
DWQ Project No.: 20041060
Rob,
Thank you for meeting with us earlier today to review constructability concerns at PFSHs located on this project. The
purpose of this email is to confirm our findings and summarize proposed construction at the devices:
Station 48+50 Rt
-Construction of this device has been affected by lack of adequate right-of-way and the presence of an intermittent stream
immediately below the device. The Department proposes to conduct the following:
• Reconstruct the rip rap basin portion of PFSH per the appropriate bottom width (4.5 ft) and 2:1 slope. The depth
will be increased from 2 ft if possible. The PSRM edge of device will not be constructed.
• Extend filter fabric at device to top of adjacent streambank and down streambank to below OHW mark. Cover all
filter fabric with rip rap. This will result in the stabilization of approximately 15 linear feet of the streambank which
would be covered under non-reporting NWP 13.
Station 46+00 Rt
-Construction of this device has been affected by lack of appropriate right-of-way and the presence of an intermittent
stream immediately below the device. The Department proposes to conduct the following:
Reconstruct the rip rap basin portion of PFSH per the appropriate bottom width (4.5 ft) and 2:1 slope. The depth
will be increased from 2 ft if possible. The PSRM edge of the device will not be constructed.
Extend filter fabric to top of adjacent streambank and down streambank to below OHW mark. Cover all filter
fabric with rip rap. This will result in the stabilization of approximately 20 linear feet of the streambank which
would be covered under non-reporting NWP 13.
Station 41+80 and 41+90 Rt
-These two PFSH structures are located approximately 10 feet apart. Construction will be affected by the distance
between the two devices, lack of adequate right-of-way and a small ephemeral channel below the two devices. The
Department proposes to conduct the following:
Construct a large, rectangular-shaped PFSH-like structure that incorporates the outlet of both pipe structures.
The Department proposes to maximize the available right-of-way to construct the rip rap basin part of the
structure. Accordingly, the PSRM edge of device will not be constructed.
The exact size of the device will be dictated by the distance between the pipe outlet and the outer edge of the
Permanent Drainage Easement. The side slopes of the rip rap basin will need to remain close to 2:1 to provide
stability. Depth will be increased from 2 ft if possible.
Station 37+00 Rt
-This PFSH will be fully constructed per the appropriate dimensions: bottom width=4.5 ft, depth=2 ft and 2:1 slope. The
PSRM edge will be constructed.
Station 35+00 Rt
-Construction of this device will be affected by the lack of adequate right-of-way. The Department proposes to conduct
the following:
• Maximize the available right-of-way to construct the rip rap basin part of the structure per the appropriate bottom
width (4.5 ft), depth (2 ft) and 2:1 side slope. The PSRM edge of device may not be constructed if space is
limited.
Station 26+90 Rt
-This PFSH will be fully constructed per the appropriate dimensions: bottom width=4.5 ft, depth=2 ft and 2:1 slope. The
PSRM edge will be constructed. Note that the device will be slightly turned so the outfall of the devices is aligned with the
low area of adjacent natural ground.
Station 22+50 Rt
-This PFSH will be fully constructed per the appropriate dimensions: bottom width=4.5 ft, depth=2 ft and 2:1 slope. The
PSRM edge will be constructed.
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