01g_NCS000250_I+M Program Presentation 9.20.19-Final Uploaded

NORTH CAROLINA
Department of Transportation
Eo r
toot,
BMP Inspection & Maintenance
Program
September 2019

Agenda
• Permit Requirements
• Program Accomplishments
• Updates & Considerations for the Future
z

Program Objectives
• Maintain a BMP Inspection and
Maintenance (I&M) Program to aid in the
inspection, operation, and maintenance of
BMPs
• Maintain and update as necessary the
BMP Inspection and Maintenance Manual
Note: anticipate changing program name to SCM I&M Program for next
Permit Renewal
3

Permit Requirements
Evaluate new BMP Evaluate new BMPs included in the BMP Toolbox or otherwise
inspection and maintenance needed for inspection and maintenance needs. The evaluation
needs. will include consideration of the BMP type, typical siting
conditions, and expected function.
Maintain BMP Inspection and Maintain written procedures outlining the inspection and
Maintenance Manual. maintenance requirements for various types of stormwater
BMPs. Written procedures will outline the regular inspection
frequency, and include an inspection checklist, "how-to"
instructions for regular maintenance, evaluation and reporting
procedures for non -routine maintenance, and an inspection and
maintenance tracking mechanism. As modifications are needed,
update the Manual to address needed changes to inspection
and maintenance techniques.
Implement a BMP Inspection Implement a BMP Inspection and Maintenance Program. The
and Maintenance Program. program will include annual training for appropriate NCDOT staff
and contractors.
BMP Inspection and BMP Inspection and Maintenance Program information will be
Maintenance information. made available upon request to DEMLR.

BMP I&M Program
• Manage BMP AM Program to aid in the inspection,
operation, and maintenance of BMPs
• Evaluate new BMPs in NCDOT's Toolbox and other I&M
needs
• Maintain written procedures outlining I&M requirements
for various BMPs
— Regular inspection frequency
— Inspection checklist
— "How-to" instructions for regular maintenance
— Evaluation/reporting procedures for non -routine maintenance
— I&M tracking mechanism
• Program includes training
5
............•........•.. ......•..,,�T -.

SCMs Locations
• SCMs are found in a
variety of locations:
• Linear roadways
• Bridges
• Industrial Facilities,
including Ferry Terminals
• Rest Areas/ Weigh
Stations
• DMV/ DOT Admin
Buildings
• Non -DOT properties
*BMPs now referred to as Stormwater
Control Measures (SCMs)
0

I&M Program Background
• Created SCM inventory and completed initial assessments
• Formed Stormwater Performance Measure Workgroup and
implemented Workgroup's recommendations
• Developed SCM I&M Manual
• Developed tracking database, Stormwater Control Management
System (SCMS)
• Developed and continue to implement SCM I&M Program
— Submit SCM I&M Program information to DEQ annually
— Perform annual internal program review which includes
identifying opportunities for improvement
— Central REU to also perform biennial maintenance/ Level of
Service (LOS) assessments and spot inspections
,,., ,..............

I&M Program Key Aspects
• NCDOT's target: 80-95% of
SCMs LOS "C" or better
• Division Roadside
Environmental staff assigned
to perform annual inspections
and ratings (vegetation control
is the primary maintenance
need)
• Central REU staff perform
annual spot inspections and
calibration inspections
biennially
• Regular inspection frequency
established in written
procedures
• Division Roadside
Environmental inspectors
receive annual training as
required
FIV

ncdot.gov
w
BMP Inspection & Maintenance Program Summary
0 M n� • 0 •Im
I
ems.
A

I&M Manual
• Provides written guidance on
conducting BMP I&M
• Customized to NCDOT needs
• Includes unique BMPs for linear
environments
• Original publication: 2010
• Updated: May 2015
• Currently being revised
— Update expected 2020
— Revising terminology
— Adding new chapters
NORTH CAROLINA
DEPARTMENT OF TRANSPORTATION
STORMWATER CONTROL
INSPECTION AND MAINTENANCE MANUAL
(LAST UPDATED: MAY2015)
North no
Ual ii lx
� partrneat eoto-f Transpartatio-n '
10

Current I&M Manual
• Fifteen Chapters
— General I&M Chapters (1-4)
— Bioretention basin
— Filtration basin
— Infiltration basin
— Detention basins -Dry and Wet
— Hazardous Spill Basin
— Stormwater Wetland
— Swale
— Level Spreader
— Permeable Pavement
— Preformed Scour Hole
— Individual Chapter Contents:
• BMP Overview
• Components Description
• I&M Procedures
— Inspection Checklists
— BMP Naming Convention
s or,5.a cr Blore"tlon Sasln
CHAPTER 5 Bioretention Basin
overview
A 810REr IM aasn, IBBy is atype of filtration basin Isle Chapter e) whh landscaped shrubs and
othervarious plants, fiber media, and am ulchcover to enhance pollutant removal.
PURPOSE AM DESCRIPTION
Elioretenton basins are structural stormwater controls ISCsI designed to temporarily capture
storm water runoff, filter and retain pollutants, and reduce peak flows.
Inflow to the bioreteraion basin is filtered through engineered media oramerded soil. The filtered
water exits through an underdrain system at the bottom of the filter media.
Specially selected plants enhance the pollutant removal capabilities of the basin.
INSPECTION
• Pondad water should infiltrate into the filter media within 4e-72 hours of a storm event;
prolonged ponding indicates that the filter media or underdrain system requires maintenance.
• The mulch layer and vegetation should be carefully inspected. Use landscaping plans as an aid
during the inspector.
• Inspections should occur annually, unless otherwise required by environmental permits or more
frequent inspections are deemed necessary.
TYPICAL MAINTENANCE
Trash and debris should ba removed from inletgratas, forebays, the basin, and trash racks.
Note: This is a specialtzed device and if major maintenanca is needed, such as the flushing of the
underdrain system, please contact th a Hydraulics and+or Roadside Environmental Units in Raleigh
forguidance.
NCDOT SC lttpector and Maintarance Manual fit
NCDCT- HSP- 2010- 01
11

ncdot.gov BMP Inspection & Maintenance Program Summary
�14111/ ■11/FTi11F.
�1
A r
• J
k +
tir
Filtration"
Cleanout
f -
.CJ� u
Forehay captures
Infiltration occurs
9) Pollutants are filtered out as storm
soaks throu h the filter media to -the
underdrain
l

ncdot.gov
BMP Inspection & Maintenance Program Summary
it Drainage
System
I.I■lw[I.
y Cleanout
Underdrain
Forebay
Emergency
Spillway
Transition ;c 1 Trash
Berm ,:... ' u �' /Rack
sF� Outlet Control
r5 S
Landscaping' ,''� - r� Structure
Iasi
1=i# er Media
Embankment \
\ Cutlet
r4_ Protection
. Cutlet
Pipe
te: Most storrnwater co.rols are not located adjacent to a water body7st e
hove diagram may depict, but rely on water conveyances such as ditch,t
and buffers to transport treated runoff to the nearest river, take, or stream.
-1

I&M Manual
Plan and profile view also provided for Bioretention Basin
(plan view below)
VARIOUS PLANT
SPECIES
TRANSITION BERM
EMERGENCY SPILLWAY
FOREBAY------.__.---_-7
i
as i
INFLDW
FILTER MEDIA
U NDERDRAIN
—TOP OF
EMBANKMENT
a
UTFALL
°
RECEIVING
CHANNEL
OUTLET CONTROL
STRUCTURE
14

•
I&M Manual
&M Checklists
— BMP-specific checklists
— New checklist organized by inlet,
outlet, basin
— Separate Maintenance forms
developed
— Available electronically through
LOS RANKING:
STORMWATER BMP: BIORETENTION BASIN Inspector(s):
BW ID#:
DIVISION:
COUNTY:
DATE INSTALLED: Inspection Date:
LOCATION:
Structural Components
Y N
NIA
❑ ❑
❑
Inlettoutlet drainage systems are structurally sound and functional.
❑ ❑
❑
Forebay and transition berm are structurally sound and functional.
Basin, embankment, and emergency spillway are structurally sound and functional.
❑ ❑
❑
(Sediment must be removed from the basin when it exceeds 50% or more of the
forebay's storage capacity.)
❑ ❑
❑
Filter media and underdrain, including cleanouts, appear to be structurally sound and
functional.
❑ ❑
❑
Outlet control structure and components are structurally sound and functional.
Areas of Maintenance
Y N
N/A
❑ ❑
❑
Inlet and outlet ditches/pipes are free of sediment, leaves, trash, and other debris.
❑ ❑
❑
Forebay is clean and free of sediment, leaves, trash, and other debris. (Sediment must
be removed when it exceeds 50% or more of the forebay's storage capacity.)
❑ ❑
❑
Grass has been mowed and undesirable vegetation removed
❑ El
❑
Plants are healthy and mulch laver is adequate (at least 3 inches).
LOS Category
LOS Description
A
Some aging and wear has occurred, but no structural deterioration or maintenance needs were
found. Device is fianctioning properly.
B
Minor structural deterioration and/or maintenance needs were found, but function of the device
has not been affected.
C
Moderate structural deterioration and/or maintenance needs were found, but function of the
device has not been significantly affected.
D
Serious deterioration in at least one structural component and/or major maintenance needs were
found. Function of the device is inadequate.
F
Device is no longer functional due to the general or complete failure of a major structural
component and/or the lack of adequate maintenance.
15

Stormwater Control
Management System (SCMS)
User Name:
Password,
Login
Web -based
database
application
containing
over 1, 900
BMPs, and
constantly
changing
Stormwater Control i icp
......................................................................................
;el ed a Division: G ■
Select Carftrol All
Type:
Structural:':
Nonstructural::
....
Law nib.m
Dee
Sdm
Bennettsville
16

SCMS Basic Functions
What SCMS does:
• Maintains inventory of BMPs
• Structural and Non-structural
• Searchable database (by ID, location, division, county,
project phase)
• Maintains records of BMP AM activities, including
schedule of completed and upcoming inspections,
maintenance needs
• Capable of tracking development of Retrofit BMPs from
Design to Construction to I&M phases
• Provides mapping tools for BMP Locations
17

SCMS Basic Functions
Overview of
General Information
page
Before performing
an inspection, the
control map can be
used to locate BMP
or series of BMPs
Control ID: IM-6-26-IB-3425 Phase: Maintenance Type; Infiftration Basin
I General l; Hydrologic Design i Construction Details Documents Images
Quick Links
.....................................................................................................
Inspection and Maintenance
View Control Map
Back to Search
...................................................................................................:
General Inforrnat:nn
County:; Cumberland ■
Control Type:. Infiltration Basin (I8) +
Control ID:.IM-6-26-IB-3425
Hydro ID:U05_CO26_000
Retrofit:
TIP: R-4436FD
Road Tier:' Interstate +
Tier Type:; Statewide +
Route Type:: I ■
-Route:'I-295
Removed:
Control has been removed from the
ground.
(dearest Town: Fayetteville
Latitude: 135.1175540
Longitude: -78.9471100
Location Description: Igore area between I-295 and off ramp to NC
I210 north of flyover bridge
Location Type: Highway (HWY) +
Notes Keywords:
M

ncdot.gov
BMP Inspection & Maintenance Program Summary
WE
NCDoT NORTIi CAROLINA DEPARTMENT OF TRA74SPORTATION
CongectiPg people, products, and places safely and of wl ertdy with cusra er Ncas, accplentapility and eR�lriPllR}ental SeRsltiY(ty
to enhance the economy and vrtairty of North Carafrrla.
SCMS
Search Controls
= Maps
Control Map
Control LOS Map
Inspaction and
Mainbenanm
Add New Control
Add New Nonstructural
Control
Inspection &
Maintenance Schedule
C I $ M Manual
SURTnWater
Control Inspedio
Maim
BMP Toolbox
I&M quick {Aide
Design Quids Guide
M SC r we story
QS Report
LOS Assessment
Rego
Retrofit Credits
Retrofit Listing
Dvermeilmegmg.
n
Home i ,wbm& I C� I C=bKt I sea.d.
n•eirg-- - iog--A Help
Tom

SCMS Basic Function
Control ID: IM-6-26-I113-3425 Phase: Maintenance Typ-e: infiltration Basin (IB)
�eneradj Hydrologic „ design Cor:struct:on Details Doc.:ments Images
Images
Photo Date:1011612018
status:j Inspection ■
Image Type: Maintenance ■
Description: basin
i
Update Delete
Photo Date:110/18/2018
Status;j Inspection ■
Image
❑escril
Update Delete
Photo Date:e/1612019
Status: Inspection
Image Type: Maintenance ■
Descrl ption:
Photo Date:8116/2019
Status: Inspection .
Image Type: Maintenance ■
Description:
Update Delete
Update Delete
20

SCMS Basic Functions
Inspection and Ala€ntenance records for IM-6-26-IB- 425
.................................................................................................................................................................................................................................................................................................................................................................................
Add Report:
Dale of
ID LOS Type Description Updated By Lastllpdated
Action
€ 7421 B Inspection Vegetation gEm%�irrg Through forebay. Basin bottom does not contain 3,r20 M9 sjsy4ees aV20f2019
adaquale cover. The cover it does have could use cutling.
6477 A Inspection minor uegelalion in and around forebay 10)1&2018 melanin_gardner 1GA&2018
€................................................................................................................................................................................................................................................................................................................................................................................€
• I&M Records
— Check I&M Schedule for when next BMP
inspection is due
— Add a new inspection report and subsequent
maintenance report if appropriate
21

SCMS Basic Functions
Inspection
• If field evaluation shows
maintenance is needed,
inspector submits
maintenance needed
report
• Once maintenance is
performed, a follow-up
inspection is performed
and new LOS rating
assigned to the BMP as
appropriate
Control ID: I M-6-26-IB-3425
Inspection Date: iD8j20I2019
Inspector: Isjsyke5
Questions: Y N NIA
Inlet and outlet drainage systems and flow bypass structure
are structurally sound and functional.
Pretreatment BMP and filter stripjswale are structurally
sound and functional.
Basin, embankment, and emergency spillway (if present) are
structurally sound and functional.
Emergency outlet control structure, sluice gate, and trash
rack are structurally sound and functional if present.
All components are free of sediment, leaves, trash, and
Other debris.
Sediment was removed from forebay if capacity was
reduced to 50% or less.
Basin sidewalls and surrounding areas are stabilized with a
dense cover ofturf grass maintained at a height of 6-15
inches.
G
L+1 Basin bottom has adequate cover (4" of sand or dense turf
grass 6-15" in height).
Sedrment was removed from basin if soil media appeared to
he clogged.
U
U t+ Areas of erosion have been repaired.
Are structural repairs needed at this site? (If yes, describe in
Comments section)
Are there maintenance needs at this site? (If yes, describe in
l Comments section)
O
CO) C, Were maintenance activities conducted during the time of
inspection? (If yes, describe in Comments section)
Las Ranidng:, B- Minor maintenance needs found but functioning properly.
Inspection) egetation growing through forebay. Basin bottom does not contain adequate cover. The cover it
DbservationsjComments:ldoes have could use cutting.
22

SCMS Basic Functions
Control I D: I M- 6- 26-IB-3425
Control Type: Infiltratton Basin
City SL County:Fayetteville
Division:0
Location €7escription:gore area between I-295 and off ramp to NC 210 north of flyover larldge
Location Type:Highway (HWY)
LOS Ranking: B - Minor maintenance needs found but functioning properly. �
Reporter: meingrarn
Report Type: Maintenance deeded
Previous Inspections:-Seiect- -TT
—
Date Maintenance D9j09j2019
Needed:
Maintenance Detail
.emove and monitor vegetation in forebay. Reestablish grass bottom of basic where there are
are spots
Save
23

SCMS — Piloting New SCM Types
Dynamic Inventory
• SCMS inventory may include other SCMs that are part of
a retrofit/pilot project or a research project
• These other SCMs are added to the inventory during the
study period, initial I&M is performed, and if appropriate
the SCM is added to the BMP Toolbox
• Examples of other SCMs include:
— Biofiltration conveyance,
— Bio-embankments, and
— Bio-swales

Division Support
• Central REU and HSP staff provides support to
which includes: inspections, technical guidance,
of new staff, and other program coordination
Level Spreader: Maintenance Completed Report Photo
Divisions
training
25

Training
• REU provides annual training or refresher training to
Division staff, as needed
— Includes training webinars, workshops, and/or individual training
for appropriate Division and Design staff
• Developed and distributes to staff:
— SCM AM Manual and updates
— SCMS Training Videos
• Provided in -field training on use of tablets and SCMS
database
• NCSU's BMP AM Certification training
• Other I&M Program training opportunities
26

I&M Program Updates
• Hurricane response
— D&F rernediation effort
• AM Manual update
• SCIVIS update
Dry Detention Basin
Hazardous Spill Basin

Hurricane Response
• Post -hurricane inspection assistance provided after Matthew,
Florence, and Michael to assess damage to NCDOT's SCMs
— 220 inspections were completed after Florence in Divisions 2, 3, 4, and 6
• REU Central will provide assistance to Divisions upon request post -
Dorian and future hurricanes
Post Hurricane Maintenance Needed

Post -Hurricane Inspections
• NCDOT's protocol to assess SCMs for
hurricane damage:
— Communication 4 Divisions notify
REU Central if they need assistance
assessing SCMs after hurricanes/
significant storms
— Planning 4 Cap/seal Infiltration
Chambers before the storm to prevent
damage. Create inspection map routes
using DOT TIMS and prioritize controls
as necessary
— Safety 4 Make sure SCM is
structurally stable and accessible. If
not, revisit at a later date
— Inspections 4 Collect field data and
assess damage using criteria
developed for Hurricane Florence
— Cost Estimates 4 Develop repair
estimates based on data collected in
the field
29

ncdot.gov
BMP Inspection & Maintenance Program Summary
Nost-Hurricane InSDectic
f 4
AD-
1 fy
•Jit �IfF - rt5 ,J
f f F 1rr { ' � i• _ J 4 J I
• r r _ �

Post -Hurricane Inspections
1799 WDB
Crew
Cost
, per Crew
Hours
Total
TS III
S49.99
0
0
$0.00
T511
540.99
1
8
S327.94
TS I
540.99
0
0
S0.00
TW
52937
3
S
54590.8E
Equipment
BrushCEpper
S3.03
0
10
$0.00
Dump Truck 33000
525.00
0
0
$0.00
Dump Truck 5UD00
540.75
2
S
$652.00
Crew Cab
S1430
l
S
$114.40
3ackhoe
52}.}5
1
S
$222.00
Trailer Light Equipment
59.40
1
S
$67.20
Front End Loader
519.00
1
S
$144.00
Tractor Duck
53025
0
0
$0.00
Low Bov Tfatlef
59.00
0
0
$0.DO
Me s s age B o ard: ArrowPannel
S4.92
0
0
$0.D6
Barricades ump sum
S164.00
0
0
$0.00
Flat Bed Dump
525.00
0
0
$0.00
Roller
539.00
0
0
$0.D6
Roller Trailer
59.00
0
0
SD.vv
Excavator_ Track
539.50
0
0
so. DO
Excavator. Wheel
S7625
0
0
$0.00
Motorgrader
566.75
1
$66.75
ssurrtirigthis isdailvfentalcostnot hourl-
516.50
0
U
$0.DO
Distnbutof
529.75
0
0
so. DO
Chain Saw
51.52
0
0
Saw
Debris Removal of Pipe Structure (LS) Total
LS $2,500.00 25DD
Material
Type
Costr nit
amatedUctotal
Aggregrate
ABC
$17.50
0
$0.00
CY
Top Soil
$12.00
60
$120.00
CY
Fill
$6.00
60
$360.00
Ton
Rip Rap
$38.25
120
$4,590.00
Ton
# 5/#571
$22.00
0
$0.D0
$0.00
0
$0.00
Pipe
15
$11.37
0
$o.00
(Linear Foot)
18
$14.14
0
$o.00
24
$24.62
0
$0.00
30
$27.34
0
$0.00
36
$43.84
0
$o.00
42
$48.30
0
$0.00
48
$48.30
0
$0.00
1@10'
3" x 6'-
$0.00
Bands
15
$10.84
0
$0.00
(Per Each)
18
$22.30
0
$0.00
24
$30.85
0
$0.00
30
$27.28
0
$0.00
Example of Cost Estimator tool used for post -hurricane damage repairs
31

SCMS Updates
Upcoming updates to SCMS
• More user friendly
— Better mapping capabilities
— Improve status tracking
— Streamline website use, including;
• Removing extraneous data
• Modifying user interface for mobile devices
• Improve document management (plans, specifications,
MOUs, I&M photos)
• Modifying map displays for linear SCMs
32

I&M Manual Up
Rainfall first reaches plants and is then soaked up by media and
plant roots and excess flow is drained away via the drainage layer __
or outlet drain and can be captured in a rain barrel and reused.
Upcoming updates to
Outlet Drain
I&M Manual _ �
x _
• New Chapters vegetative Cover Plants Pollutants may bremoved evapotranspiration,
soil adsorption and biologicall uptake.
B i o Swale Growth Media
Gravel
Synthetic Geotextile
Fabric
Sheet Drain Filter Fabric
Waterproofing
— Catch -All ChapterMembrane
• Revisions to reflect
global updates and
new policies
Green Roof Graphic for New Chapter
Infiltration Chamber Under Construction
33

Considerations for the Future
• NCDOT anticipates completing updates to its AM
Manual and SCMS
• NCDOT
will continue
to evaluate
the program's
internal
processes to
identify any
new opportunities
for improvement
• NCDOT plans to evaluate repair costs related to
post -hurricane efforts to help determine future
Division budgeting needs for the AM Program
• NCDOT will continue to evolve the SCM inventory
based on research and needs of the linear
environment
34

I&M Program