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Home My WebLink About20051972 Ver 4_Email_20090925Ridings, Rob From: Murray, Christopher A Sent: Friday, September 25, 2009 5:02 PM To: Ridings, Rob Cc: Miller, Eben T; Allen, Jeffrey D; Pearson, Donald R Subject: Construction of PFSHs on U-4026 in Durham and Wake County Reference: Widening of Davis Drive (SR 1613/1999) from Morrisville Carpenter Road to North of NC 54 in Durham and Wake County DWQ Project No.: 20051972 Rob Thank you for meeting with us earlier today to review constructability concerns at several PFSHs located on this project. The purpose of this email is to confirm our findings and summarize proposed construction at some of the devices: Station 271+50 Rt .1 i -Construction of this device was affected by lack of adequate right-of-way (PDE) and the presence of a perennial stream immediately below the device. The Department has constructed the following: • The rip rap basin portion of the PFSH was constructed per the appropriate depth (2 ft) and 2:1 slope. However, the appropriate bottom width (4.5 ft) could not be constructed to the full dimension due to the above-mentioned limiting factors. The PSRM edge of device was constructed. Station 281+00 Rt ... -Construction this device will be affected by the lack of adequate right-of-way. The Department proposes to conduct the following: • Construct a rectangular-shaped PFSH-like structure to fit within the limited right-of-way. The Department proposes to meet the area that would be constructed if using the appropriate detail bottom width (5 ft), depth (2 ft) and 2:1 slope. The PSRM edge of device will be constructed. Station 320+60 Lt -This device will be constructed in a maintained, grassed area adjacent to a bank. A small swale is located approximately 75 ft from the pipe outfall. The Department proposes to conduct the following: • This basin portion of the device will be fully constructed per the appropriate detail dimensions: bottom width=5 ft, depth=2 ft and 2:1 slope. The PSRM edge will not be constructed. Thanks for your assistance. Chris Murray Email correspondence to and from this sender is subject to the N.C. Public Records Law and may be disclosed to third parties.