HomeMy WebLinkAboutRC 20160520000033 •
Return Address:
City Clerk's Office 1111111111111
City of Renton
1055 S Grady Way 20160520000033
Renton,WA 9805792.00
CITY OF RENTON COV
PAGE-001 OF 020
05/20/2016 08:42
DECLARATION OF COVENANT FOR INSPECTION AND
MAINTENANCE OF STORMWATER FACILITIES AND BMPS
Grantor:The Reserve at Renton Partners LLLP
Grantee:City of Renton
Legal Description:Parcel D of City of Renton Boundary Line Adjustment No LUA 99-062 LLA Recording No 9905129006 being a portion of a parcel D of
City of Renton boundary line adjustment No.LUA 99-017 LLA Recording No 9904069001 being a portion of Henry H Tobin of section 18-23-05 (see attached legal)
Assessor's Tax Parcel ID#:182305-9238
IN CONSIDERATION of the approved City of Renton Utility permit
for application file No.LUA/SWP 13001726 relating to the real property("Property")
described above,the Grantor(s),the owner(s)in fee of that Property,hereby covenants(covenant)with the
City of Renton,a political subdivision of the state of Washington,that he/she(they)will observe,consent
to,and abide by the conditions and obligations set forth and described in Paragraphs 1 through 10 below
with regard to the Property,and hereby grants(grant)an easement as described in Paragraphs 2 and 3.
Grantor(s)hereby grants(grant),covenants(covenant),and agrees(agree)as follows:
1. The Grantor(s)or his/her(their)successors in interest and assigns("Owners of the described
property")shall at their own cost,operate,maintain,and keep in good repair,the Property's stormwater
facilities and/or best management practices("BMPs") constructed as required in the approved
construction plans and specifications on file with the City of Renton and-submitted to the
City of Renton for the review and approval of permit(s) 13001726 .The
property's stormwater facilities and/or best management practices("BMPs")are shown and/or listed on
Exhibit A.The property's stormwater facilities and/or BMPs shall be maintained in compliance with the
.operation and maintenance schedule included and attached herein as Exhibit B. Stormwater facilities
include pipes,swales,tanks,vaults,ponds,and other engineered structures designed to manage and/or
treat stormwater on the Property. Stormwater BMPs include dispersion and infiltration devices,native
vegetated areas,permeable pavements,vegetated roofs,rainwater harvesting systems,reduced impervious
surface coverage,and other measures designed to reduce the amount of stormwater runoff on the
Property.
2. City of Renton shall have the right to ingress and egress over those portions of the Property
necessary to perform inspections of the stormwater facilities and BMPs and conduct maintenance
activities specified in this Declaration of Covenant and in accordance with RMC 4-6-030.
3. If City of Renton determines that maintenance or repair work is required to be done to any of
the stormwater facilities or BMPs,City of Renton shall give notice of the specific maintenance and/or
repair work required pursuant to RMC 4-6-030. The City shall also set a reasonable time in which such
Page 1 of 3 Form Approved by City Attorney 10/2013
•
work is to be completed by the Owners. If the above required maintenance or repair is not completed
within the time set by the City,the City may perform the required maintenance or repair,and hereby is
given access to the Property, subject to the exclusion in Paragraph 2 above, for such purposes. Written
notice will be sent to the Owners stating the City's intention to perform such work. This work will not
commence until at least seven(7)days after such notice is mailed. If,within the sole discretion of the
City,there exists an imminent or present danger,the seven(7)day notice period will be waived and
maintenance and/or repair work will begin immediately.
4. If at any time the City of Renton reasonably determines that a stormwater facility or BMP on
the Property creates any of the hazardous conditions listed in RMC 4-4-060 G or relevant municipal
successor's codes as applicable and herein incorporated by reference,the City may take measures
specified therein.
5. The Owners shall assume all responsibility for the cost of any maintenance or repair work
completed by the City as described in Paragraph 3 or any measures taken by the City to address hazardous
conditions as described in Paragraph 4. Such responsibility shall include reimbursement to the City
within thirty(30)days of the receipt of the invoice for any such work performed. Overdue payments will
require payment of interest at the current legal rate as liquidated damages. If legal action ensues,the
prevailing party is entitled to recover reasonable litigation costs and attorney's fees.
6. The Owners are hereby required to obtain written approval from City of Renton prior to
filling,piping,cutting,or removing vegetation(except in routine landscape maintenance) in open
vegetated stormwater facilities(such as swales,channels,ditches,ponds,etc.),or performing any
alterations or modifications to the stormwater facilities and BMPs referenced in this Declaration of
Covenant.
7. Any notice or consent required to be given or otherwise provided for by the provisions of this
Agreement shall be effective upon personal delivery, or three(3)days after mailing by Certified Mail,
return receipt requested.
8. With regard to the matters addressed herein,this agreement constitutes the entire agreement
between the parties,and supersedes all prior discussions,negotiations,and all agreements whatsoever
whether oral or written.
9. This Declaration of Covenant is intended to protect the value and desirability of the real
property described above,and shall inure to the benefit of all the citizens of the City of Renton and its
successors and assigns. This Declaration of Covenant shall run with the land and be binding upon
Grantor(s),and Grantor's(s)successors in interest,and assigns.
10. This Declaration of Covenant may be terminated by execution of a written agreement by the
Owners and the City that is recorded by King County in its real property records.
IN WITNESS WHEREOF,this Declaration of Covenant for the Inspection and Maintenance of
Stormwater Facilities and BMPs is executed this 5 day of April ,2016
The Reserve at Renton Partners LLLP
GRANTOR, ��me Property
GRANTOR,owner of the Property
Page 2 of 3 Form Approved by City Attorney 10/2013
STATE OF WASHINGTON )
COUNTY OF SNOHOMISH )ss.
On this day personally appeared before me:
' wPtt�2 , 4,-/TC ° ) ,to me known to be the individual(s)described in
and who executed the within and foregoing instrument and acknowledged that they signed the same as
their free and voluntary act and deed,for the uses and purposes therein stated.
Given under my hand and official seal this ,5AL--day of ,gyp-) / ,20// .
't/- l,tcdc flrx.plfe
NOTARY PUBUC 0134 A4./Ll 044.41',6i t_c
STATE OF WASHINGTON Printed name
BETH ANN CAMPBELL Notary Public in and for the State of Washington,
My Appointment Expires residing at
AUGUST 25,2018
6 r1{e cr-r—s�1, 1
My appointment expires r`}44?S-,b0/e
Page 3 of 3 Form Approved by City Attorney I0/2013
•
LEGAL DESCRI'I1ON
PARCEL D CF CITY OF RENTON,LOT UNE ADJUSTMENT NO.WA-99-017-11A, ACCORDING
10 SURVEY RECORDED APRO 6, 1999 IN WOE 128 OF SURVEYS AT PAGE 275, 275A,
2756 AND 275C UNDER RECORDING NO.9904t 101, IN KING COUNTY,VASHINGTOt
BITN1G A PORION OF HENRY IL TOBIN DONATION LAND OLA@i NUNBFR 37,AND OF
GOVERNMENT LOT 11, 13 AND 16 OF SEC1ICN 18,TOWNSHIP 23 NORTH,RANGE 5 EAST,
VALLAMETIE I IERIDIAN,AM)OF TRACT 1,Z 3 AND 4 OF SUPPLEMANTAL YAP OF RENTON
SHORE LANDS, ACCORDING TO 1HE MAPS ON FILE IN THE OFFICE OF TFIE COMMONER OF
PUBLIC LANDS, IN MAFIA,WASIINGTON.
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EXHIBIT'A'
OPERATIONS AND MAINTENANCE MANUAL(2 OF 3)
The proposed storm system consists of catch basins that capture on-site runoff
and route it through conveyance pipes to the City storm system.Permeable
Pavement has been implemented in some areas of the site and will need to be
maintained as well.Included in this Operation and Maintenance Manual is an
8.5"x 11"grading and drainage plan sheet showing the location of these
facilities on the plan.Please note that this map is generated during the design
phase and may not reflect all changes made in permitting and construction.CG
Engineering may be contacted for an updated copy of this map once the as-built
drawings are completed for the site.
Exxel Pacific(project contractor)will be responsible for passing along the
information in this maintenance manual to the property management company
for the senior apartments.This manual shall be kept in offices of the proposed
building. Upon request by the City of Renton,it shall be made available for their
inspection.
Included in this manual are facility specific sheets indicating the various
maintenance components of the following facilities:
Catch Basins:Concrete structures with steel grates that collect stormwater
runoff from the site and act as junctions for storm conveyance pipes.
Conveyance Pipes:Conveyance Pipes will run the flow to appropriate locations
as shown on the plan sheets.
Landscaping:Landscaping throughout the site will require maintenance as
indicated in the included specification sheet.
Filterras:Filterras are a system to provide enhanced water quality treatment to
stormwater prior to its discharge into the City storm system.
Permeable Pavement:Pavement with pourous openings that allows stormwater
to infiltrate into the ground. Because King County has not developed a specific
maintance sheet for permeable pavements,recommendations are included from
the 2012 Low Impact Development Technical Guidance Manual for Puget Sound
by Washington State University Extension and Puget Sound Partnership.
Facilities shall be inspected for defects listed in the following facility sheets.The
frequency of this should occur as noted on the sheets(A=annually(in
September),W=at least once during the wet season,etc).Most maintenance
•
•
OPERATION AND MAINTENANCE - EXHIBIT "B" (13 PAGES)
Maintenance Checklist FILTERRA
Drainage.` Conditions to Check ConditionsThat -
ystem.; -. - Problem Actions=
Failure.,_.
For.- Should Exist:
Inlet Excessive sediment or Accumulated sediments Inlet should be free of Sediments and/or trash
trash accumulation or trash impair free flow obstructions allowing free should be removed.
of water into Filterra distributed flow of water
into Filterra.
Mulch Cover Trash and floatable Excessive trash and/or Minimal trash or other Trash and debris should
debris accumulation debris accumulation. debris on mulch cover. be removed and mulch
cover raked level.Ensure
bark nugget mulch is not
used.
Mulch Cover `Ponding"of water on "Ponding"in unit could be Stormwater should drain Recommend contact
mulch cover. indicative of clogging due freely and evenly through -"manufacturer and replace
to excessive fine mulch cover. mulch as a minimum.
sediment accumulation or
spill of petroleum oils.
Vegetation Plants not growing or in Soil/mulch too wet, Plants should be healthy Contad manufacturer for
poor condition. evidence of spill. and pest free. advice.
Incorrect plant selection.
Pest infestation.
Vandalism to plants.
Vegetation Plant growth excessive Plants should be Trim/prune plants In
appropriate to the accordance with typical
species and location of landscaping and safety
Filterra. needs.
Structure Structure has visible Cracks wider than V2 inch Vault should be repaired.
cracks or evidence of soil
particles entering the
structure through the
cracks.
Maintenance is ideally to be performed twice annually.
Inspection to be performed after every major storm event>1 inch total depth;subject to climate..
•
EXHIBIT'A'
OPERATIONS AND MAINTENANCE MANUAL t30F 3)
tasks are generally reactionary to a defect being found,rather than a matter of
constant upkeep.It is generally expected that few to none of these defects will
be present upon the yearly inspection of each facility.The facility sheets list the
potential conditions warranting maintenance and the expected result following
any maintenance.Several engineer's notes for specific tasks are provided within
the facility sheets.Unless otherwise noted on the facility sheets the maintenance
tasks should be performed on an"as needed"basis:(a)when the described
defect is'visible to whomever performs the yearly inspection,or(b)should any
defect become apparent between inspections.
•
NO. 5-CATCH BASINS AND MANHOLES
Maintenance Defect or Problem Condition When Maintenance is Needed Results Expected When
Component Maintenance is Performed
Structure Sediment Sediment exceeds 60%of the depth from the Sump of catch basin contains no
bottom of the catch basin to the invert of the sediment.
lowest pipe into or out of the catch basin or is
within 6 inches of the invert of the lowest pipe
into or out of the catch basin.
Trash and debris Trash or debris of more than'/2 cubic foot which No Trash or debris blocking or
is located immediately in front of the catch basin potentially blocking entrance to
opening or is blocking capacity of the catch basin catch basin.
by more than 10%.
Trash or debris in the catch basin that exceeds No trash or debris in the catch basin.
1/3 the depth from the bottom of basin to invert the
lowest pipe into or out of the basin.
Dead animals or vegetation that could generate No dead animals or vegetation
odors that could cause complaints or dangerous present within catch basin.
gases(e.g.,methane).
Deposits of garbage exceeding 1 cubic foot in No condition present which would
volume. attract or support the breeding of
insects or rodents.
Damage to frame Corner of frame extends more than 3/4 inch past Frame is even with curb.
and/or top slab curb face into the street(If applicable).
Top slab has holes larger than 2 square inches or Top slab is free of holes and cracks.
cracks wider than'A inch.
Frame not sitting flush on top slab,i.e., Frame is sitting flush on top slab.
separation of more than%inch of the frame from
the top slab.
Cracks in walls or Cracks wider than'%inch and longer than 3 feet, Catch basin is sealed and
bottom any evidence of soil particles entering catch structurally sound.
basin through cracks,or maintenance person
judges that catch basin is unsound.
Cracks wider than%inch and longer than 1 foot No cracks more than 1/4 inch wide at
at the joint of any inlet/outlet pipe or any evidence the joint of inlet/outlet pipe.
of soil particles entering catch basin through
cracks.
Settlement/ Catch basin has settled more than 1 inch or has Basin replaced or repaired to design
misalignment rotated more than 2 inches out of alignment. standards.
Damaged pipe joints Cracks wider than''A-inch at the joint of the No cracks more than Y.-inch wide at
inlet/outlet pipes or any evidence of soil entering the joint of inlet/outlet pipes.
the catch basin at the joint of the inlet/outlet
pipes.
Contaminants and Any evidence of contaminants or pollution such Materials removed and disposed of
pollution as oil,gasoline,concrete slurries or paint. according to applicable regulations.
Source control BMPs implemented if
appropriate. No contaminants
present other than a surface oil film.
Inlet/Outlet Pipe Sediment Sediment filling 20%or more of the pipe. Inlet/outlet pipes clear of sediment.
accumulation
Trash and debris Trash and debris accumulated in inlet/outlet No trash or debris in pipes.
pipes(includes floatables and non-floatables).
Damaged Cracks wider than''h-inch at the joint of the No cracks more than'h-inch wide at
inlet/outlet pipes or any evidence of soil entering the joint of the inlet/outlet pipe.
at the joints of the inlet/outlet pipes.
NO. 5-CATCH BASINS AND MANHOLES
Maintenance Defect or Problem Condition When Maintenance is Needed Results Expected When
Component Maintenance is Performed
Metal Grates Unsafe grate opening Grate with opening wider than 7/8 inch. Grate opening meets design
(Catch Basins) standards.
Trash and debris Trash and debris that is blocking more than 20% Grate free of trash and debris.
of grate surface. footnote to guidelines for disposal
Damaged or missing Grate missing or broken member(s)of the grate. Grate is in place and meets design
Any open structure requires urgent standards.
maintenance.
Manhole Cover/Lid Cover/lid not in place Cover/lid is missing or only partially in place. Cover/lid protects opening to
Any open structure requires urgent structure.
maintenance.
Locking mechanism Mechanism cannot be opened by one Mechanism opens with proper tools.
Not Working maintenance person with proper tools.Bolts
cannot be seated. Self-locking cover/lid does not
work.
Cover/lid difficult to One maintenance person cannot remove Cover/lid can be removed and
Remove cover/lid after applying 80 lbs.of lift. reinstalled by one maintenance
person.
l �
•
NO.6-CONVEYANCE PIPES AND DITCHES
Maintenance Defect or Problem Conditions When Maintenance is Needed Results Expected When
Component Maintenance is Performed
Pipes Sediment&debris Accumulated sediment or debris that exceeds Water flows freely through pipes.
accumulation 20%of the diameter of the pipe.
Vegetation/roots Vegetation/roots that reduce free movement of Water flows freely through pipes.
water through pipes.
Contaminants and Any evidence of contaminants or pollution such Materials removed and disposed of
pollution as oil,gasoline,concrete slurries or paint. according to applicable regulations.
Source control BMPs implemented if
appropriate. No contaminants
present other than a surface oil film.
Damage to protective Protective coating is damaged;rust or corrosion Pipe repaired or replaced.
coating or corrosion is weakening the structural integrity of any part of
pipe.
Damaged Any dent that decreases the cross section area of Pipe repaired or replaced.
pipe by more than 20%or is determined to have
weakened structural integrity of the pipe.
Ditches Trash and debris Trash and debris exceeds 1 cubic foot per 1,000 Trash and debris cleared from
square feet of ditch and slopes. ditches.
Sediment Accumulated sediment that exceeds 20%of the Ditch cleaned/flushed of all sediment
accumulation design depth. and debris so that it matches design.
Noxious weeds Any noxious or nuisance vegetation which may Noxious and nuisance vegetation
constitute a hazard to County personnel or the removed according to applicable
public. regulations. No danger of noxious
vegetation where County personnel
or the public might normally be.
Contaminants and Any evidence of contaminants or pollution such Materials removed and disposed of
pollution as oil,gasoline,concrete slurries or paint. according to applicable regulations.
Source control BMPs implemented if
appropriate. No contaminants
present other than a surface oil film.
Vegetation Vegetation that reduces free movement of water Water flows freely through ditches.
through ditches.
Erosion damage to Any erosion observed on a ditch slope. Slopes are not eroding.
slopes
Rock lining out of One layer or less of rock exists above native soil Replace rocks to design standards.
place or missing(If area 5 square feet or more,any exposed native
Applicable) soil.
•
•
NO. 11 -GROUNDS(LANDSCAPING)
Maintenance Defect or Problem Conditions When Maintenance is Needed Results Expected When
Component Maintenance is Performed
Site Trash or litter Any trash and debris which exceed 1 cubic foot Trash and debris cleared from site.
per 1,000 square feet(this is about equal to the
amount of trash it would take to fill up one
standard size office garbage can). In general,
there should be no visual evidence of dumping.
Noxious weeds Any noxious or nuisance vegetation which may Noxious and nuisance vegetation
constitute a hazard to County personnel or the removed according to applicable
public. regulations. No danger of noxious
vegetation where County personnel
or the public might normally be.
Contaminants and Any evidence of contaminants or pollution such Materials removed and disposed of
pollution as oil,gasoline,concrete slurries or paint. according to applicable regulations.
Source control BMPs implemented if
appropriate. No contaminants
present other than a surface oil film.
Grass/groundcover Grass or groundcover exceeds 18 inches in Grass or groundcover mowed to a
height. height no greater than 6 inches.
Trees and Shrubs Hazard Any tree or limb of a tree identified as having a No hazard trees in facility.
potential to fall and cause property damage or
threaten human life. A hazard tree identified by
a qualified arborist must be removed as soon
as possible.
Damaged Limbs or parts of trees or shrubs that are split or Trees and shrubs with less than 5%
broken which affect more than 25%of the total of total foliage with split or broken
foliage of the tree or shrub. limbs.
Trees or shrubs that have been blown down or No blown down vegetation or
knocked over. knocked over vegetation. Trees or
shrubs free of injury.
Trees or shrubs which are not adequately Tree or shrub in place and
supported or are leaning over,causing exposure adequately supported;dead or
of the roots. diseased trees removed.
Table 8. Maintenance Standards and Procedures for Permeable Pavement
• Recommended Frequency*
Condition when
Routine
Component Inspection Maintenance Maintenance is Needed Action Needed(Procedures
(Standards)
•
Permeable A,S Runoff from adjacent • Clean deposited soil or other materials from permeable pavement
Pavements,all pervious areas deposits or other adjacent surfacing
soil,mulch or sediment • Check If surface elevation of planted area is too high,or slopes
on'paving - towards pavement,and can be regraded(prior to regrading,
protect permeable pavement by covering with temporary
plastic and secure covering In place)
• Mulch and/or plant all exposed soils that may erode to pavement
surface
Porous asphalt or A or B None(routine Clean surface debris from pavement surface using one or a
pervious concrete maintenance) combination of the following methods:
• Remove sediment,debris,trash,vegetation,and other debris
deposited onto pavement(rakes and leaf blowers can be used for
removing leaves)
• Vacuum/sweep permeable paving installation using:
• Walk-behind vacuum(sidewalks)
a High efficiency regenerative air or vacuum sweeper(roadways,
parking lots)
• ShopVac or brush brooms(small areas)
• Hand held pressure washer or power washer with rotating brushes
Follow equipment manufacturer guidelines for when equipment is
most effective for cleaning
Table 8. Maintenance Standards and Procedures for Permeable Pavement
Recommended Frequency*
Routine Condition when
Component Inspection Maintenance Maintenance Is Needed Action Needed(Procedures
(Standards)
'Surface/INeii ng,Course(coni). _ , �`,� , .. • ,,.
Porous asphalt or A** • Review the overall performance of the facility(note that small
Surface is clogged:
pervious concretePonding on surface or clogged areas may not reduce overall performance of facility)
water flows off the • Test the surface infiltration rate using ASTM C1701 as a corrective
permeable pavement maintenance indicator.Perform one test per installation,but not
surface during a rain less than 1 test per 2,500 square feet.
event(does not • If the results indicate an infiltration rate of 10 inches per hour or
infiltrate) less,then perform corrective maintenance to restore
permeability.
To clean clogged pavement surfaces,use one or combination of the
following methods:
• Combined pressure wash and vacuum system calibrated to not
dislodge wearing course aggregate.
• Hand held pressure washer or power washer with rotating brushes
• Pure vacuum sweepers
Note:If the annual/biannual routine maintenance standard to clean
the pavement surface is conducted using equipment from the list
above,corrective maintenance may not be needed.
A Sediment present at the • Assess the overall performance of the pavement system during a
surface of the pavement rain event.If water runs off the pavement and/or there is ponding
then see above.
• Determine source of sediment loading and evaluate whether or
not the source can be reduced/eliminated. If the source cannot be
addressed,consider increasing frequency of routine cleaning
(e.g.,twice per year instead of once per year).
Summer Moss growth inhibits • Sidewalks:Use a stiff broom to remove moss In the summer when
infiltration or poses slip it is dry
safety hazard • Parking lots and roadways:Pressure wash,vacuum sweep,or use
a combination of the two for cleaning moss from pavement
surface.May require stiff broom or power brush in areas of
heavy moss.
• Table 8. Maintenance Standards and Procedures for Permeable Pavement
• Recommended Frequency a
Routine Condition when
Component inspection Maintenance Maintenance is Needed Action Needed(Procedures
_ (Standards)
Porous asphalt or Major cracks or trip • Fill potholes or small cracks with patching mixes
pervious concrete A hazards and concrete • Large cracks and settlement may require cutting and
spailing and raveling replacing the pavement section.Replace in-kind where
feasible.Replacing porous asphalt with conventional
asphalt is acceptable if it is a small percentage of the
total facility area and does not impact the overall
facility function.
• Take appropriate precautions during pavement repair and
replacement efforts to prevent clogging of adjacent porous
materials _
Interlocking A or B None(Routine Clean pavement surface using one or a combination of the following
concrete blocks Maintenance methods:
and aggregate • Remove sediment,debris,trash,vegetation,and other debris
pavers deposited onto pavement(rakes and leaf blowers can be used for
removing leaves)
• Vacuum/sweep permeable paving installation using:
o Walk-behind vacuum(sidewalks)
o High efficiency regenerative air or vacuum sweeper(roadways,
parking lots)
o ShopVac or brush brooms(small areas)
• Note:Vacuum settings may have to be adjusted to prevent excess
uptake of aggregate from paver openings or joints.Vacuum
surface openings in dry weather to remove dry,encrusted
sediment.
Table 8. Maintenance Standards and Procedures for Permeable Pavement
Recommended Frequency*
Routine 'Iondition when
Component Inspection Maintenance Maintenance is Needed Action Needed(Procedures
(Standards)
Interlocking A** • Review the overall performance of the facility(note that small
concrete blocks Surface is clogged: clogged areas may not reduce overall performance of facility)
and aggregate Ponding on surface or • Test the surface infiltration rate using ASTM C1701 as a corrective
pavers water flows off the maintenance indicator.Perform one test per installation,but not
permeable pavement less than one test per 2,500 square feet.
surface during a rain • If the results indicate an infiltration rate of 10 inches per hour or
event(does not less,then perform corrective maintenance to restore
infiltrate) permeability.
• Clogging is usually an issue in the upper 2 to 3 centimeters of
aggregate.Remove the upper layer of encrusted sediment,and
fines,and/or vegetation from openings and joints between the
I pavers by mechanical means and/or suction equipment(e.g.,pure
vacuum sweeper).
• Replace aggregate in paver cells,joints,or openings per
manufacturer's recommendations _
A Sediment present at the • Assess the overall performance of the pavement system during a
surface of the pavement rain event.If water runs off the pavement and/or there is ponding,
then see above.
• Determine source of sediment loading and evaluate whether or
not the source can be reduced/eliminated.If the source cannot be
addressed,consider increasing frequency of routine cleaning
(e.g.,twice per year instead of once per year).
Summer Moss growth inhibits • Sidewalks:Use a stiff broom to remove moss in the summer when
infiltration or poses slip it is dry
safety hazard • Parking lots and roadways:Vacuum sweep or stiff broom/power
brush for cleaning moss from pavement surface
A Paver block missing or • Remove individual damaged paver blocks by hand and replace or
damaged repair per manufacturer's recommendations
A Loss of aggregate Refill per manufacturer's recommendations for interlocking paver
material between paver sections
blocks
• A Settlement of surface May require resetting
• Table 8. Maintenance Standards and Procedures for Permeable Pavement
Recommended Frequency*
Routine
Condition when
Component Inspection Maintenance Maintenance is Needed Action Needed(Procedures
(Standards)
Open-celled A or B None(routine • Remove sediment,debris,trash,vegetation,and other debris
paving grid with maintenance) deposited onto pavement(rakes and leaf blowers can be used for
gravel removing leaves)
___ _ • Follow equipment manufacturer guidelines for cleaning surface.
A** Aggregate is clogged: • Use vacuum truck to remove and replace top course aggregate
Ponding on surface or • Replace aggregate in paving grid per manufacturer's
water flows off the recommendations
permeable pavement
surface during a rain
event(does not
infiltrate)
A j Paving grid missing or • Remove pins,pry up grid segments,and replace gravel
damaged • Replace grid segments where three or more adjacent rings are
broken or damaged
_ _ _ • Follow manufacturer guidelines for repairing surface.
A _ _ Settlement of surface May require resetting
A I Loss of aggregate Replenish aggregate material by spreading gravel with a rake(gravel
material in paving grid level should be maintained at the same level as the plastic rings or no
more than 1/4 inch above the top of rings).See manufacturer's
recommendations. _
A Weeds present • Manually remove weeds
• Presence of weeds may indicate that too many fines are present
(refer to Actions Needed under"Aggregate is clogged"to address
this issue)
Open-celled A or B None(routine • Remove sediment,debris,trash,vegetation,and other debris
paving grid with maintenance) deposited onto pavement(rakes and leaf blowers can be used for
grass removing leaves)
• Follow equipment manufacturer guidelines for cleaning surface.
Table 8. Maintenance Standards and Procedures for Permeable Pavement _
Recommended Frequency*
Routine Condition when
Component Inspection Maintenance Maintenance is Needed Action Needed(Procedures
(Standards)
Open-celled A** Aggregate is clogged: • Rehabilitate per manufacturer's recommendations
paving grid with Ponding on surface or
grass water flows off the
permeable pavement
surface during a rain
event(does not
infiltrate)
A Paving grid missing or •Remove pins,pry up grid segments,and replace grass
damaged •Replace grid segments where three or more adjacent rings are
broken or damaged
• Follow manufacturer guidelines for repairing surface.
A I Settlement of surface { •May require resetting
A Poor grass coverage in • Restore growing medium,reseed or plant,aerate,and/or amend
paving grid vegetated area as needed
• Traffic loading may be inhibiting grass growth;reconsider traffic
_ loading if feasible
As needed None(routine • Use a mulch mower to mow grass
maintenance) _
A None(routine • Sprinkle a thin layer of compost on top of grass surface(1/2"top
maintenance) dressing)and sweep it in
_ • Do not use fertilizer _
A Weeds present • Manually remove weeds
• Mow,torch,or inoculate and replace with preferred vegetation
Table 8. Maintenance Standards and Procedures for Permeable Pavement
•
Recommended Frequency*
Routine Condition when _____
Component Inspection Maintenance Maintenance is Needed Action Needed(Procedures
(Standards)
inlets/Ou'tlets/Pipes.: _ :. y v
1 Inlet/outlet pipe A Pipe is damaged Repair/Replace
A Pipe is clogged gg
Remove Roots or debris
Underdrain pipe Clean pipe Clean orifice at least _Plant roots,sediment or • Jet clean or rotary cut debris/roots from underdrain(s)
as needed biannually(may need debris reducing • If underdrains are equipped with a flow restrictor(e.g.,orifice)to
more frequent capacity of underdrain • attenuate flows,the orifice must be cleaned regularly
cleaning during wet (may cause prolonged
season drawdown period) _
Raised Clean Pipe Clean orifice at least Plan roots,sediment or _ • Jet clean or rotary cut debris/roots from underdrain(s)
subsurface as needed biannually(may debris reducing • If underdrains are equipped with a flow restrictor(e.g.,orifice)to
overflow pipe need more frequent capacity of underdrain attenuate flows,the orifice must be cleaned regularly
cleaning during wet (may cause prolonged
season) drawdown period) _
Outlet structure A,S Sediment,vegetation, i • Clear the blockage
or debris reducing • Identify the source of the blockage and take actions to prevent
capacity of outlet future blockages
structure __
Overflow B Native soil is exposed or Repair erosion and stabilize surface
other signs of erosion
damage are present at
discharge point
Ag9reggteStprage lieservolr . . . f
Observation Port A,S Water remains in the If immediate cause of extended ponding is not identified,schedule
storage aggregate investigation of subsurface materials or other potential causes of
longer than anticipated system failure.
by design after the end
of a storm
• Table 8. Maintenance Standards and Procedures for Permeable Pavement
• Recommended Frequency*
Routine Condition when
Component Inspection Maintenance Maintenance is Needed Action Needed(Procedures
(Standards)
r'Vegetatfon e,
Adjacent Large As needed Vegetation related • Sweep leaf litter and sediment to prevent surface clogging and
Shrubs or trees fallout clogs or will ponding
potentially clog voids • Prevent large root systems from damaging subsurface structural
components
Once in May and Vegetation growing Edging and trimming of planted areas to control groundcovers and
once in September beyond facility edge shrubs from overreaching the sidewalks,paths and street edge
onto sidewalks,paths, improves appearance and reduces clogging of permeable pavements
and street edge by leaf litter,mulch and soil.
Leaves,needles, Accumulation of Use leaf blower or vacuum to blow or remove leaves,evergreen
and organic organic debris and leaf needles,and debris(i.e.,flowers,blossoms)off of and away from
debris litter permeable pavement _
*Frequency A=Annually;B=Biannually(twice per year);S=Perform inspection after major storm events(24-hour storm event with a 10-year or greater
recurrence interval).**Inspection should occur during storm event.
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