20170750 Ver 1_Concord Streams Notes 2017_20170731

Concord Streams Notes
July 21, 2017
USACE- Larry Creech
Teresa Bullard
Keleigh Cox

NCDEQ- Alan Johnson
Ousmane Sidibe

Notes for Allen:
1) Root wads need to be anchored properly, not perpendicular
2) Rock veins and riffle pools- huge rocks in the stream is not going to let the water
flow the way it’s supposed to unless in large flows
3) Riffle pools need to be a blend of large rock, 57 stone, gravel, sand, screening,
etc.
4) Instead of root wads, consider using brush mattresses instead
5) What is being done about the tree clearing? Wants 50/50 late/early succession
trees
6) SB11 check DDR report- how long will this section stay flooded?* Concern about
pipe getting clogged.
7) SB10 check DDR report (same as SB11 concerns)*

*SB10 and SB11 have a drawdown time of 2 days

Notes for Sid:
1) #1&2 Landowner agreement (we have an example)- agreement between the city
and landowners
2) Hold off on plan revision; without it they can’t grant the permit
3) Suggested to work on main stream first, and work on SB10 and SB11 later
4) Send 2 copies of full-size sets to Sid
5) Recalculate disturbed areas based on the right-of-way limits on the project
6) 2 temporary silt fences on both sides of the project
7) He is fine with the staging areas and hull roads
8) Wait to re-advertise to submit sediment and erosion control plan
9) Silt bags- don’t use straw, use aggregate instead
10) City of Concord is in charge of the buffer areas- need to get permission from
them
11) 404B1 analysis- verify that we have permission and send to Sid
12) Send wetland report to Sid
13) Possible change in sediment and erosion control fee based on disturbance area