DRAFT Sample of Operations & Maintenance Plan and Inspection ChecklistsSample: Operations & Maintenance Plan
and Inspection Checklists
Prepared by:
Carver County Water Management Organization
in cooperation with Carver Soil and Water Conservation district
C t CARVER
COUNTY
Carver County ,, � w
Water Management Organization
;JIRV E R
Operations and Maintenance Plan Carver county Courthouse Porous Paving + Biofiltration
Legal Description: Lot 1, Block 1, and Outlot A. COURTHOUSE CAMPUS TWO. PID# 301490010
Contact: Kevin Maas (952) - 361 -1557
600 E 4th St
Chaska, MN 55318
Project Description /: This project was installed during the fall of 2008 as a demonstration site for the
Purpose use of porous paving and planted filtration trench within Carver County,
The project serves to treat the stormwater prior to entering into the adjacent
East Chaska Creek. The approximate drainage area is - 37,000 sq ft.
Maintenance is necessary to the functionality and long -term success of the
project. Features include:
• Porous bituminous pavement w/ underdrain
• Planted Biofiltration w/ underdrain
All underdrains are connected to adjacent catch basin w/ manhole. Inspections
of the connection into the catch basin will indicate that the underdrain is
functioning.
Maintenance Tasks — Courthouse Porous Paving + Biofiltration
Timeline
Task
Personnel
February
➢
Schedule porous pavement sweeper for April, July and
➢
Facilities Dept. Manager
October
April
➢
Remove dead plant material (if not completed in the fall)
➢
Facilities Dept. Staff
➢
Sweep porous pavement with a regenerative air
➢
Contracted Services & Facilities Dept. Manager
vacuum sweeper
➢
Replace and dead plants w/ new plugs or transplants
May
➢
Add mulch swale as needed
➢
Facilities Dept. Staff
➢
Mow grass buffer around swale
➢
Contracted Services & Facilities Dept. Manager
June
➢
Mow grass buffer around swale
➢
Contracted Services & Facilities Dept. Manager
➢
Weed swale
➢
Facilities Dept. Staff (Planning & Water Mngt staff
are available to assist with plant identification)
July
➢
Weed swale
➢
Facilities Dept. Staff (PWM staff available to assist)
➢
Mow grass buffer around swaie
➢
Contracted Services & Facilities Dept. Manager
➢
Sweep porous pavement with a regenerative air
➢
Contracted Services & Facilities Dept. Manager
vacuum sweeper
August
➢
Mow grass buffer around swale
➢
Contracted Services & Facilities Dept. Manager
➢
Weed swale
➢
Facilities Dept. Staff (PWM staff are available to
assist with plant identification)
September
➢
Mow grass buffer around swale
➢
Contracted Services & Facilities Dept. Manager
October
➢
Mowing & fixing any erosion /gullying formed during
➢
Facilities Dept. Staff
season
Early
➢
Remove dead plant material (could also wait until
➢
Facilities Dept. Staff
November
spring)
➢
Contracted Services & Facilities Dept. Manager
➢
Sweep porous pavement with a regenerative air
vacuum sweeper
Additional
No
sand (de- icing) is to be used at any time on or around the porous pavement. Salt use for de -icing should follow the
guidelines laid out by the Minnesota Pollution Control Agency.
Site aerial
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/-BINMINOUS PAVEMENT 13 15
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EXISTING SUBGRAOE
1
INFILTRATION BASIN PLANTINGS
Common Name Scientific Name
Y Aster novae- angliae
Iris versicolor
LLB" Prairie Bla ngs ar Liatris pychnostachya
RF Black Eyed Susan Rudbeckia hirta
SOD
QTY.
74
76
28
25
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2 -6- DIAMETER DRAINTRES -REFER
TO DRAWINGS FOR LOCATION .J
ANOINVERT
1
- - -- '. - �- PRESCRIBED TOPSOIL MEDIUM
F .
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Ny
C$.1 C5.1 BITUMINOUS PAVEMENT -�
4'41" $00 SECTION -
PROVIDE EOG ER
TO SPECIFICATIONS
REFER TO SHEET 1.1.1 FOR _
ARTING / SEEDING THIS AREA
EROSION CONTROL
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__ BLANKET
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2 -6- DIAMETER DRAINTRES -REFER
TO DRAWINGS FOR LOCATION .J
ANOINVERT
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- - -- '. - �- PRESCRIBED TOPSOIL MEDIUM
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Flower Leaf Juvenile
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Biofiltration (Rain Garden) Maintenance Inspection Checklist
Inspector:
Date:
Time:
Weather: Rainfall over previous 2 -3 days?
Reading from closest NOAA reporting station: "
Rain Garden Location:
Mark items in the table below using the following key:
X Needs immediate attention
Not Applicable
✓ Okay
? Clarification Required.
Rain Garden Components:
Items Inspected
Checked
Maintenance
Needed
Inspection
Frequency
DEBRIS CLEANOUT
Y
N
Y
N
M
1. Rain gardens and contributing areas clean of debris
2. No dumping of yard wastes into rain garden
3. Litter (trash, debris, etc.) have been removed
VEGETATION
M
4. No evidence of erosion
5. Is plant composition still according to approved plans
6. No placement of inappropriate plants
DEWATERING AND SEDIMENTATION
A,AMS
7. Rain garden dewaters between storms
8. No evidence of standing water
9. No evidence of surface clogging
10. Sediments should not be greater than 20% of Swale
design depth
OUTLETS /OVERFLOW SPILLWAY
A, AMS
11. Good condition, no need for repair
12. No evidence of erosion
13. No evidence of any blockages
INTEGRITY OF BIOFILTER
M
14. Raingarden has not been blocked or filled
inappropriately
15. Mulch layer is still in place (depth of at least 3 ")
16. Noxious plants or weeds removed
Inspection Frequency Key A= Annual, M= Monthly, AMS= After Major Storm
Comments:
OVERALL CONDITION OF FACILITY:
In accordance with approved design plans? Y / N In accordance with As Built plans? Y / N
Dimension on as built:
Field Verified Dimension:
Maintenance required as detailed above? Y / N Compliance with other consent conditions? Y / N
Comments:
Dates by which maintenance must be completed:
Dates by which outstanding information as per consent conditions is required by: :
Inspector's signature:
Consent Holder/Engineer/Agent's
Consent Holder/Engineer /Agent's name
Porous Paving Maintenance Inspection Checklist
Inspector:
Date:
Time:
Weather: Rainfall over previous 2 -3 days?
Site Conditions:
Mark items in the table below using the following key:
X Needs immediate attention
— Not Applicable
✓ Okay
? Clarification Required.
Porous Pnvinv C:mmnanentae
Items Inspected
Checked
Maintenane
e
Needed
Inspection
Frequency
PAVEMENT SURFACE
Y
N
Y
N
M
1. Signs of clogging (e.. standing water)?
2. Debris accumulation (mulch, sticks, trash)?
3. Sediment accumulation?
4. Standing water present?
ADJACENT AREAS
A, AMS
5. Erosion from underdrain outlet?
6. Exposed soil in areas discharging to porous
— paving?
7. Is porous pavement adversely affected by any
adjacent site feature?
DEWATERING
A, AMS
8. Does runoff discharge from pavement area within
48hrs?
OUTLETS /OVERFLOW
A, AMS
9. Is outlet for storm sewer system free from debris
and in good working order?
OTHER
10. Have there been complaints?
A
11. Public Hazard noted?
12. Other:
Inspection Frequency Key A= Annual, M= Monthly, AMS= After Major Storm
Comments:
OVERALL CONDITION OF FACILITY:
In accordance with approved design plans?
Y / N
In accordance with As -Built plans?
Y / N
Dimension on as built:
Y / N
Field Verified Dimension:
Y / N
Maintenance required as detailed above?
Y / N
Compliance with other consent conditions?
Y / N
Dates by which maintenance must be completed:
Dates by which outstanding information as per consent conditions is required by::
Inspector's
Consent Holder/Engineer /Agent's
Consent Holder/Engineer /Agent's name