Form_2_NCS000250_Example ICA Report

North Carolina Department of Transportation
Roadside Environmental Unit
Erosion & Sedimentation / Stormwater Report
ICA
Immediate Corrective Action
This project does not comply with the North Carolina Erosion and Sedimentation Control laws. Immediate Corrective Action is needed
to resolve the situation to full compliance with the Law: (T15A: 04B.0000).
Proiect Information
Inspection Date: 05/16/2019
Evaluator:
Todd Hiatt
Project #: 34497.3.6
TIP #:
R-2707C
Contract #:
Division #: 12
County:
Cleveland
Project Type: Contract
Engineer:
Shelby Resident
Project Length: 4.79
Disturbed Acres:
0
River Basin: Broad
HQW Zone:
NO
Trout Zone: NO
Location US-74 (Shelby Bypass) From East of NC-226
to East of NC-150
Description:
Project Evaluation
Report Type: ❑Routine
❑✓ ICA ❑ICA Ex 1st
❑ICA Ex 2nd
❑CICA - SWO
❑ PCN
❑ ECPAR
Installation Maintenance
Effectiveness
Plan
Overall Project
Length Section
of BMPs of BMPs
of BMPs
Implementation
Evaluation
4.79 The Entire Project
8 6
7
7
7
0.5 Permitted Area(s)
6 7
7
6
6
Grading Scale: 0 - 6 = Immediate Corrective Action Required, 7 = Fair, 8 = Good, 9 = Very Good, 10 = Excellent
Remarks and Recommendations:
Project is out of compliance due to failure to install and maintain erosion control devices and failure to take all
reasonable measures to prevent off -site sedimentation in accordance with section 107-12 of the Standard
Specifications and the Sedimentation Pollution Control Act.
Site 17 was reviewed with Donna Hood (DWR) Trish Beam (DEO), Kelly Yelton and ES Wagner Personnel.
The remainder of the project was reviewed with Kelly Yelton and Joe Brooks.
The project received approximately 2.5 inches of heavy rain on 5/11. This resulted in large sediment losses at
Site 17 and at Sta. 403 LT. The sediment loss at Site 17 had substantial impacts to the JS. This issue was
reported in a timely manner and the Contractor began clean-up efforts right away. The sediment loss at Sta.
403 was not reported and was considered a routine corrective action during the NPDES inspection. As a
reminder, ALL sediment losses that are greater than a 5-gallon bucket must be reported to DWR or DEMLR
within 24-hours and should be considered Urgent.
It is recommended that the contractor work with NCDOT personnel to approach these recommendations in a
systematic manner and giving priority to corrective actions in jurisdictional areas. The contractor must have
the personnel available to complete Urgent items within 24 hours and Routine items within 5 days.
NCDOT NPDES NCS000250
9/24/2019 10:03 AM Page 1 of 3

During the review, several issues were noticed throughout the project and may not be specifically noted in this
report. These items include the following:
-Repair eroded slopes. Many rills have been noted throughout the project.
-Clean out and repair temporary silt ditches.
-Begin mowing areas where vegetation is beginning to limit access and visibility of erosion and sediment
control measures.
-Reseed areas that have failed to successfully establish a stand of vegetation. This includes areas that have
been temp seeded, and riparian areas where native seed was used.
-Cleanout and repair skimmer basins and Type B silt basins throughout the project. Ensure that interior and
exterior slopes of the basins are stabilized with seed and matting.
-General efforts to divert, direct, and slow sediment laden stormwater should always be taken.
SITE 17
-Contractor failed to install measures in accordance with NCDOTs standard erosion and sediment control
practices prior to the rain event. The contractor chose to install a berm along the grade to impound runoff, and
then use a pump to convey this water into a skimmer basin. The pump then became inoperable during the rain
event, which caused the berm and perimeter measures to fail. Initial estimates of off -site sediment were
approximately 2.5 tandem loads.
-Complete sediment removal from the stream as per DWRs recommendations.
-Utilize slope drains to convey runoff to the bottom of the slope. Install large RPIST-As at the inlets to capture
sediment. Also, use TDs in conjunction with wattles and silt basins to better manage runoff in large disturbed
drainage areas.
-Continue to divert runoff into Basin 16.6C&G until it must be removed due to the phase of grading.
-Stage seed these slopes as the fill is brought to grade.
Sta. 403 - URGENT
-The contractor has failed to maintain EC measures in this area. Perimeter EC measures along the toe of
slope are now buried in silt, RPISTs at slope drain inlets are overtopped, and temporary diversions are in a
state of disrepair. Soils in this area have high erosivity and several rills have formed along the slope and
adjacent to the toe protection that need to be repaired ASAP.
-Large amount of unprotected off site sediment is within 50 ft of the river; therefore, cleanup efforts need to
begin ASAP. Ensure that disturbed areas outside of the ROW are hand seeded and matted.
-Mow the temporary vegetation to enable personnel to identify and access eroded areas along the slope.
-Repair rills and all EC measures in this area.
-Recommend installing a large skimmer basin in the area where the contractor has attempted to use a berm to
control sediment. Use dimensions and specs from Basin 5.2.
Site 4 - URGENT
-SSCF outlet (SDO) is overtopped with sediment and the silt fence has been undermined. Some sediment has
been deposited on the streambank stabilization. Consult with the DEO regarding further cleanup efforts.
-Maintain Basin 7.1 - Remove accumulated silt and stabilize interior slopes and adjacent bare areas that have
remained idle.
-Repair and cleanout diversion ditches and TRSC-As. Ensure PAM is reapplied after each 0.5-inch rain event.
Sta. 406 to 418
-Basin 6.3 - Remove the slope drain that has been installed in the spillway. The invert of this pipe is at the
same elevation as the rock pad under the skimmer. Therefore, this basin is not functioning as intended. Also,
stabilize the bare slopes adjacent to the skimmer outlet.
-Basin 6.4 - Slope drain is placed in the last cell where the skimmer is located. Reposition this outlet behind
the baffles.
-Repair rills and maintain EC devices in this area. Many devices are beginning to overtop with accumulated
silt.
-Install silt basins along the top of slope as per plan.
-Stabilize bare areas adjacent to the toe protection with seed and matting. These areas are subject to erode.
Sta. 454 to 466
-Contractor needs to better manage runoff by constructing temporary diversions. Place wattles or checks with
PAM in the TDs to slow runoff and control turbidity.
-Remove accumulated silt, repair rills, and maintain EC measures
-Stabilize bare areas that have remained idle.
-Basin 10.3 - Clean out and stabilize the interior slopes.
NCDOT NPDES NCS000250
9/24/2019 10:03 AM Page 2 of 3

Sta. 502 to 512
-Site 13 - FROM THE PREVIOUS REPORT - Repair large rills that have formed under the coir fiber matting.
These areas need to be reseeded with native seed ASAP. The adjacent fill slopes have been partially repaired
but are beginning to slough again. The contractor plans to replace 4-5 ft. of fill material along the slopes and
regrade. Recommend doing this work this spring while temperatures are ideal for establishing permanent
vegetation. Remove accumulated silt and keep the silt fence maintained.
-Site 12 - Some siltation has occurred behind the silt fence. Ensure that there are no gaps between the silt
fence and the headwall. Maintain the silt fence by removing accumulated sediment. Continue to closely
monitor this slope for erosion.
-There are lots of bare ground and maintenance needs throughout this area.
-Y9RPA - Sta. 16+50 +/- LT - FROM THE PREVIOUS REPORT - Silt fence is undermined by gullies adjacent
to the JS. Repair eroded areas and reinstall silt fence. SSCF outlets need to be installed in low areas.
-Y9RPB - Sta. 10 +/- Stabilize bare areas and perform routine maintenance.
-Y8 - Sta. 30 LT - FROM THE PREVIOUS REPORT - Disturbed areas along the toe of slope need to be
stabilized ASAP.
Sta. 587 to 593
-Large rills continue to form along the grade at Sta. 590. This is causing large amounts of sediment to
accumulate at Basin 20.3. Rills should be repaired and stabilized. Use EC practices such as berms, slope
drains, or TDs with velocity controls to prevent this area from eroding.
-Repair rills in the fill slope and maintain perimeter silt fence along the toe of slope.
-Reseed areas that do not have a sufficient stand of vegetation.
Sta. 599 to 605
-Maintain Basin 21.3 - The contractor has partially cleaned out the basin; however, the last cell, at the outlet, is
still full of sediment which is severely limiting the functionality of the basin. As mentioned in previous reports -
do not stockpile removed silt adjacent to the basin.
-This area has been temporary seeded in the past, but there is not enough coverage to stabilize the soil.
Reseed this area and repair all temporary diversions and checks.
-Construct diversion ditches to convey runoff into the first cell of Basin 21.3. Much of the runoff from this
drainage area is currently being diverted into the last cell.
The follow up inspection will be done by May 28th.
NCDOT NPDES NCS000250
9/24/2019 10:03 AM Page 3 of 3