20080813 Ver 1_Email_20090401

Re: Replacement of Br. 133 on SR 1412 over Grassy Creek in Granvil...
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Subject: Re: Replacement of Br. 133 on SR 1412 over Grassy Creek in Granville County O b
From: Rob Ridings <rob.ridings a ncmai Lnet>
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Date: Wed, 01 Apr 2009 15:39:32 -0400
To: "Murray, Christopher A" <cmurray rr ncdot.gov>
Chris,
Your proposed change makes sense and I agree with it. Bedrock can be a replacement for the cross vanes as needed.
Thanks,
Rob
Murray, Christopher A wrote
Reference:
-NCDOT permit application on April 29, 2008
-NCDENR-DWQ permit dated May 19, 2008. DWQ Project No. 20080813
-USACE NWP permit dated August 6, 2008. USACE Action ID No. 200421002
Eric and Rob.
This project involves the replacement of the existing bridge over Grassy Creek. The project also includes relocation of a small unnamed
tributary located to the west of SR 1412 (see attached drawing).
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The contractor has been grading the relocated channel and has encountered bedrock in the footprint of the relocated channel.
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I of 2 4/1/2009 3:39 PM
Re: Replacement of Br. 133 on SR 1412 over Grassy Creek in Granvil...
I have discussed the situation with Jamie Lancaster (PDEA-NEU), the RE and the contractor. We believe that the lowest cross vane should
not be installed on the project due to the presence of bedrock in the location of the cross vane. Additionally, header rock in this location is
below the water of the unnamed tributary. -The purpose of the cross vanes on the project is for grade control. The bedrock existing in this
location should serve as adequate grade control.
An additional cross vane is depicted on the upper ends of the relocated channel. This is located at the tie in point of the new channel and the
existing channel. Bedrock in this location will also lead to a future request to delete this cross vane. We will no[ be in this part of the
relocated channel until the lower end of the channel is stabilized with a stand of vegetation.
We wanted to provide you with this information. Please let me know if you agree with our assessment of the situation.
Thanks,
Chris Murray
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2 of 2 4/l/2009 3:39 PM