20140762 Ver 5_FW_ NCDWR review of R-2915 E_20210623

Wanucha, Dave
From:Hining, Kevin J
Sent:Tuesday, June 22, 2021 5:58 PM
To:Wanucha, Dave
Subject:FW: NCDWR review of R-2915 E
Hey Dave,

Glad you stuck with the plans today and didn’t let me detour you with my wet weather concerns. It turned into a nice
day, and the project didn’t get the rain we had in nearby areas. Below is a list of items I sent our staff and the
contractor. I’ve told Todd to let me know if he has any additional comments. Likewise, I’ll pass along any additional
comments you send me as well. But, wanted to let you know we should be taking care of these items soon.

Thanks again,

Kevin

Station 751 right (permit site 11A/B) – The coir fiber at the pipe inlet looks good, but please add additional coir fiber and
native seed mix to the area/path they used to walk into the site. This area begins at the gravel pad and goes to the pipe
inlet. Also, if no other work is needed in this area, remove the gravel pad to the best you can, and seed this area.

Station 768+50 left (permit site 15A) – The alterations to the silt bag looked much better, but the silt fence is no longer
connected to the SDO on the right side of the headwall. Please J-hook the silt fence into the SDO. If the silt bag is going
to be used much longer, and/or is used frequently, then we may need to add an additional SDO on the left side of the
headwall so that the silt fence is not overtopped by the silt bag runoff.

Station 771 right (permit site 15B) – this is the inlet side of the same pipe that crews are working on at permit site
15A. Please mat and seed the slope going from Candlelight Drive down to the headwall. Remove silt bag and
contents. Using the native seed mix, seed and put down coir fiber on both sides of the stream at the pipe inlet. Once
the sandbags are removed, there may be the need to bucket out some of the sediment at the pipe inlet prior to turning
the water back on.

Speaking of this last location at permit site 15 – currently, water in the stream is being pumped to a stormwater pipe
near Station 772, and probably not re-joining the stream until several hundred feet below the project. This dewatered
area/stream reach below the pipe outlet is a temporary impact, but not covered on our permit. In this case, we still
have water flowing into the dewatered channel through various seeps/wetland areas, so I don’t think there are any real
issues to aquatic organisms. But, if the stream were larger and held fish, we could cause a fish kill since the area is
dewatered for a good length. I don’t know of a better or alternative way to do what they are doing, but in the future I’ll
measure out the dewatered area and notify NCDWR of the additional temporary impacts, just to keep us
covered. Please let me know if you think of any other sites where we plan to use a similar dewatering method, where
we are sending the water into a separate stormwater system or stream, as I’d like to take a look at it. And, my
apologies if this site was mentioned to me and I missed it.

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