HomeMy WebLinkAboutJuly 7 report - post cleanupMr. Dave Wanucha,
We had sediment losses at several sites at three highway projects due to the
recent rain event (June 19 through 23).
The Highway 24/27 project in Albemarle recorded 4.4 inches of rainfall which
resulted in sediment losses at four locations (pictures and volumes attached). The
project inspector had work crews clean the areas up already and submitted before
and after pictures.
The NC 3 project in Kannapolis recorded 3.84 inches of rainfall which resulted in a
sediment loss at one location (pictures attached). Runoff from roadway at Y15
overwhelmed sandbags diverting runoff from roadway to curb inlets. Runoff at
Permit Site 7S-2 eroded out material behind the silt fence and washed through
SSCF outlet. Appears majority of material has been deposited on stream bank and
what material made it to the JS is gone. Once the sediment has been recovered, I
will forward more pictures showing our cleanup efforts and will provide a total
number of buckets recovered. Please let me know if you have any concerns or
questions about this loss or if you would like to schedule an onsite
inspection. Please see the attached pictures of permit site 7S-2.
The Tory Path Road project in Waxhaw recorded 3.35 inches of rainfall which
resulted in sediment losses at three locations (pictures attached). Permit site 1
has less than % inch of sediment in the stream channel for less than 100 linear
feet. Permit site 2 has between % to 1 inch of sediment deposited in
approximately 3,000 square feet of wetland but the area is completely covered
with herbaceous vegetation. Permit site 3 has 1 % to 4 inches of sediment in a
stream channel for approximately 200 linear feet.
Respectfully submitted,
NC
Permit Site 01 before 6/20/23
7. Albemarle. Stanly Countv. TIP: R-253013; NCDWR: 20181416v2; USACE: SAW-2008-02315
Contractor removed 4, 5 gallon buckets. Project had 4.4" of rain
from Monday afternoon until Friday morning.
Permit Site 01 after 6/23/23
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Permit Site 03 before 6/20/23
Contractor removed 4, 5 gallon buckets. Project had 4.4" of rain
from Monday afternoon until Friday morning.
Permit Site 03 After 6/23/23
Permit Site 08 6/20/23
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Contractor removed 3, 5 gallon buckets. Project had 4.4" of rain
from Monday afternoon until Friday morning.
Permit Site 08 6/23/23
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Permit Site 29 6/23/23
Permit Site 29 6/24/23
Removed 6, five gallon buckets from drainage structure at Permit Site 29
NC 3, Kannapolis, Cabarrus County
TIP: U-3440; NCDWR: 20160605; USACE: SAW-2012-00417
After cleanup.
Tory Path Road, Waxhaw, Union County, TIP: Y 55001C; NCDWR: 20201838; USACE: SAW-2019-01336
Site 3, before cleanup.
More rain was recorded on June 24; therefore, more measurement and
pictures will be submitted. Work crews will be using shovels and buckets to
remove sediment from Sites 2 and 3.
Channel cleanup effort was checked on June 29, 2023. It was determined more sediment
needed to be removed.
Site 2, after cleanup
Site 2, after cleanup
Site 1, Less than 0.25 inch of sediment in stream channel. No remedial actions
recommended.
The contractor recovered a total of 327 - 5 gallon buckets of silt from site 2, site
3, and two other non -jurisdictional sites where sediment exited the project
limits. The contractor is increasing the size berms, adding additional check dams,
and increasing size of inlet protection measures to try to prevent losses in the
future.