20190210 Ver 2_Compliance Evaluation Inspection_20210803

Wetland Inspection Report
Inspection Type:
Reason for Inspection:
Inspection Date:
Site Owner Name:
Latitude:
County:
Project Name:
Project Num:
Location:
SW Plan Location:
20190210
NCDOT - NC 69 Widening (A-0011C)
Clay
NCDOT - NC 69 Widening (A-0011C)
NC DOT Division 14 - Sylva
7/27/2021
Site Inspection (DOT)
Version: 2 Status:Issued
Project Type:Road/Highway Widening
Region:Asheville
Longitude:-83° 49' 32''+35° 00'
Inspection Contact Person:Title:Phone:
On-Site Representative(s):
Secondary Inspector(s):
Primary Inspector:Phone:Robert K Mitchell
Facility Compliance Status:Compliant Not Compliant
Question Areas:
Program Areas:401 (includes isolated/non-404)
Permit (401 WQC)
On July 27,2021, Kevin Mitchell was notified by NCDOT of an inadvertent discharge of flowable fill into a jurisdictional
stream below the NC 69 road widening project A-0011C (DWR#20190210 V2). According to the inspectors, the
contractor was filling a water line with flowable fill. Due to the pressure in the pipe, the fill was discharged into a drop
inlet that discharges into a jurisdictional stream. Approximately 150-200 feet of stream were impacted with flowable fill.
Kevin Mitchell inspected the site on the same day. Flowable fill material had been removed from the stream by the time
I reached the site. The drop box and culvert were jetted for any residual and pumped out at the outlet. Elevated pH
levels were documented dowstream of the release for approximately 1,000 linear feet. Levels ranged from 11.6 (directly
below the discharge) to 9.07 at the furthest point downstream. The pH on a downstream tributary not effected by the
discharge was 8.8. The water quality standard for pH on class C streams should be between 6 and 9.
A follow up inspection was conducted on July 29, 2021. Nick Adams was present during the inspection. All of the
material had been removed from the stream and pH levels were back to normal (between 6 & 8).
Inspection Summary:
page:1
Inspection Date:
Site Number:
Inspection Type:
Owner:
Reason for Visit:
20190210
7/27/2021
Blazer, Keith
Site Inspection (DOT)
Permit (401 WQC)Yes No NA NE
Does the impact(s) match what was approved in the 401 WQC or non 404 permit?
Are the culverts and/or filled areas installed properly?
Is the site compliant with additional conditions of the 401 WQC or non 404 permit?
An inadvertent discharge of flowable fill was observed in a jurisdictional stream. Approximately 200
linear feet of stream were impacted from the material. Elevated levels of pH were noted approximately
1,000 feet downstream of discharge.
Condition #2 of the 401 Water Quality Certification reads "If concrete is used during construction, a dry
work area shall be maintained to prevent direct contact between curing concrete and stream water.
Water that inadvertently contacts uncured concrete shall not be discharged to surface waters due to the
potential for elevated pH and possible aquatic life and fish kills." [15A NCAC 02B.0200]
Comment:
page:2