20130918 All Versions_May 13 Report Temp Stream Crossing (2)_20160513

NCDOT-Greensboro Eastern Loop From North of US-70 TO US-29 North of Greensboro
Guilford County U-2525B

Bank Stabilization for Temporary Stream Crossing
at Buffalo Creek, Bi-Weekly Report
Project # C2003399

May, 2016

Project Background:
The scope of work for the Greensboro Eastern Loop includes grading, drainage, paving,
retaining walls and structures over the course of a 5.5 mile by-pass. Structures (6 &7)
are designed to cross over Buffalo Creek- adjoining US-70 to US-29 North. NCDOT is
permitted to construct a temporary stream crossing with minimal disturbance to the
bank and surrounding wetlands until construction is complete. To maintain the integrity
of the stream’s bank, NCDOT is responsible for stabilizing the embankment with riprap
and fabric. Upon project completion, the stream’s channel and bank shall be restored
within its original state.

Project Goals:
NCDOT’s goal is to establish permanent vegetation that enhances aquatic habitat,
connects hydrological connectivity between the stream and the floodplain, reduce any
soil erosion pre/post construction and re-establish a protected forested riparian
corridor.

Vegetation and Precipitation:
This area has received approximately 6” of rain over the last two weeks. There has been
no evidence of extreme flow events by way of observing the vegetation and matting
that was recently established using a native seed mix. It appears that the stream
channel has been normal within this reporting period.

Stream Stability and Function:
NCDOT has stabilized the embankment by extending riprap along the right and left sides
of the stream to reduce any impact to channel and surrounding wetlands. Pictures are
attached of this area herein, as well as the stream’s bank within 200 feet up and
downstream of the stabilization area. With several rain events over the last two weeks,
we have not seen any substantial implications of erosion or disturbance of the stream at

this time.

Continuing Management:
We will continue to monitor the stream’s embankment bi-weekly to ensure minimal
impacts to the wetlands area with majority of runoff being diverted to tiered skimmer
basin (ID.-11.1). As the Contractor continues to construct the bridges at Buffalo Creek,
NCDOT will continue to temporary seed and mulch disturbed areas, especially those
near the creek, as needed. Once activities are complete under the bridge, we can
approach final grading where permanent seeding and mulching will take place.