20170402 Ver 1_Beaufort 88 Attachment L for LIBR_20170405

Attachment L: Low Impact Bridge Replacement Process
Low Impact Bridge Project No.: 17BP.2.R.75 County: Beaufort
Bridge No. 88 over Horsepen Swamp WBS Element Number 17BP.2.R.75
This project is subject to the Low Impact Bridge Process as agreed to on October 6,
2009. This project meets the documentation requirements and approval procedures
under NEPA, as defined by FHWA, for Low Impact Bridge Replacements. This project
meets the standards of NCDOT's Minimum Criteria Rules.
Date:
Applicant Name
Applicant Address
April 4, 2017
North Carolina Department of Transportation
P.O. Box 1584
Greenville NC 27835
Primary Contact for Project: Hon Yeunq
Phone No.:
252-249-2800
Is this an after-the-fact application: Yes X No
River Basin:
Stream Classification
Tar-Pamlico
C; Sw, NSW
Regulatory Authorization Options for this Activity
Federal: USACE Nationwide General Permit 3— Maintenance
State: General Water Quality Certification #3687 and/or Buffer Authorization
Local: None
ProjeCt DeSCriptiOn — State project 17BP.2.R.75 involves the replacement of Beaufort County Bridge
#660088 on SR 1414 (Horsepen Swamp Rd.) over Horsepen Swamp. The existing bridge consists of 1@ 16' -
1", 1@ 14' - 7", 1@ 15' - 0" and 1@ 16' - 1" timber deck spans on timberjoists and is to be replaced with a 1
@ 70' - 0", 24" cored slab bridge (70' total length, 33' total width) at the same location. In accordance with Tar-
Pamlico River Buffer Regulations, the proposed bridge does not contain deck drains. All stormwater from the
bridge and approaches will be collected by a storm drainage system and discharged into wetland. The drainage
system will outlet outside of the buffer limits in the southeast quadrant at -L- station 14+60 RT with the outlet
pipe set at 0.3% to reduce velocity into the wetland. Northwest quadrant ditch discharges directly into the
wetland at -L- station 12+80 LT with rip rap set at 0.0% to reduce velocity into the wetland. The southwest
quadrant ditch design maintains the existing drainage patterns along Horsepen Swamp.
Signature:
Print Name: Hon Yeunq
Title: Project Enqineer