HomeMy WebLinkAboutRC 20170323000399 � '
20170323000399
CITY OF RENTON COV 86.00
PAGE-001 OF 014
03/23/2017 09:54
KING COUNTY, WA
--.�''..►'s.5 ��J�':-
RECORDING REQUESTED BY AND
WHEN RECORDED MAiL TO:
CITY CLERK'S OFFICE
CITY OF RENTON
1055 SOUTH GRADY WAY
RENTON. WA 98057
DECLARATION OF COVENANT
FOR MAINTENANCE AND INSPECTION OF FLOW CONTROL BMPS
Grantor: Renton School District
Grantee: City of Renton
Legal Dcscription: Lot 1 of City of Renton Short Plat No 070-80
Recording No. 8107299002 in King County, Washington
Additional Lcgal(s)on:
Assessor's Tax Parcel ID#: 292305-9061
TN CONSiDERATION of the approved City of Renton(check one of the following) ❑ residential
building permit, � commercial building permit, ❑ clearing and grading permit, ❑ subdivision permit,or
❑ short subdivision permit for Application File No. LUA/SWP LUA13-001481, SA-A relating to the
real property("Property")described above,the Grantor(s),the owner(s) in fee of that Property,hereby
\
covenants(covenant)with City or 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 ] through 8 below with regard to the Property. Grantor(s)hereby grants(grant),
covenants(covenant),and agrees(agree)as follows:
1. Grantor(s) or his/her(their)successors in interest and assigns("Owners")shall retain,uphold,
and protect the stormwater management devices,features,pathways, limits,and restrictions, known as
flow control best management practices("BMPs"), shown on the approved Flow Control BMP Site Plan
for the Properiy attached hereto and incorporated herein as Exhibit A.
2. The Owners shall at their own cost,operate, maintain, and keep in good repair,the Property's
BMPs as described in the approved Design and Maintenance Details for each BMP attached hereto and
incorporated herein as Exhibit B.
3. City or Renton shall provide at least 30 days written notice to the Owners that entry on the
Property is planned for the inspection of the BMPs. After the 30 days,the Owners shall allow the City of
Renton to enter for the sole purpose of inspecting the BMPs. In lieu of inspection by the City,the
Owners may elect to engage a licensed civil engineer registered in the state of Washington who has
expertise in drainage to inspect the BMPs and provide a written report describing their condition. If the
engineer option is chosen,the Owners shall provide written notice to the City of Renton within fifteen
days of receiving the City's notice of inspection. Within 30 days of giving this notice,the Owners,or the
engineer on behaif of the Owners,shall provide the engineer's report to the City of Renton. If the report
is not provided in a timely manner as specified above,the City of Renton may inspect the BMPs without
further notice.
4. ]f the City determines from its inspection,or from an engineer's report provided in accardance
with Paragraph 3,that maintenance,repair,restoration,and/or mitigation wark is required for the BMPs,
The City shall notify the Owners of the specific maintenance, repair,restoration,and/or mitigation wark
(Work)required under RMC 4-6-030. The City shall also set a reasonable deadline for completing the
Work or providing an engineer's report that verifies completion of the Work. After the deadline has
passed, the Owners shall allow the City access to re-inspect the BMPs unless an engineer's report has
been provided verifying completion of the Work. If the work is not completed properly within the time
frame set by the City,the City may initiate an enforcement action. Failure to properly maintain the BMPs
is a violation of RMC 4-6-030 and may subject the Owners to enforcement under the RMC 1-3, including
fines and penalties.
5. Apart from performing routine landscape maintenance,the Owners are hereby required to
obtain written approval from the City or Renton before performing any alterations or modifications to the
BMPs.
6. Any notice or approval required to be given by one party to the other under the provisions of
this Declaration of Covenant shall be effective upon personal delivery to the other party, or after three(3)
days from the date that the notice or approval is mailed with delivery confirmation to the current address
on record with each Party. The parties shall notify each other of any change to their addresses.
7. This Declaration of Covenant is intended to promote the efficient and effective management of
surface water drainage on the Property,and it 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.
8. This Declaration of Covenant may be terminated by execution of a written agreement by the
Owners and the City of Renton that is recorded by King County in its real property records.
1N WITNESS WHEREOF,this Declaration of Covenant for the Maintenance and Inspection of
Flow Control BMPs is executed this��'day of /�fl/,�"� ,20�.
G , r of the Property
GRANTOR,owner of the Property
STATE OF WASHINGTON )
COUNTY OF KING )ss.
On this day personally appeared before me:
�f/-�i ui � �«✓i�5 ,to me known to be the individual(s)described in
and who execut d 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 �y'rnday of /�'JCt/Gh ,20 /v7' .
�s����2 /f�_ t.1�1-�.C.%
�S'a,�d:��. in. vv��
Notuy PubUc Printed name
St�te ot W�shinpton Notary Public in and for the State of Washington,
SANDRA M DOIPH residin at
My AppoiMmeM Expires Nor 27,2017 g
�f i`7�1�
My appointment expires /L.���r=%• ol'I, �?U/7
EXHIBIT A
----� � ,_, ,�, ---� r
-�,�--�__-�.�-_�---- -`♦
1--�-_ `
1 `
I ` \
♦
1 1
1 1
I '
1 I
1 1
`' 1
� � I
� . �I �� 1
I O k
' * � I
'
' 1
�_ NELS N DL S��H �
� I
I � �'] . �
i oo � @. • I
I �
�
� I� • —
I " RAINGARDEN 2 -_, �
DETENTION TANK 1 �
1 I 1
I <<
� E T DETENTION
� N TANK 2
I RAINGARDEN 1 HO S -��-r
i
� � RAINGARDEN 3 > �
1
�� � Q �
�
S 27th ST w �
--------r=-=�-�_,---r—,--r� ----- �
�----N -- - , �
GRAPHIC SCALE '
0 100 200 400
PROJECT 2130241.10
1"=200 FEET SEPTEMBER 30, 2016
STORMWATER FACILITIES
Exhibit B
Operations and Maintenance
This document contains a summary of the operations and
maintenance (O&M) requirements for the site's stormwater
BMPs. The owner must maintain this O&M document and
append as required.
MAINTENANCE INSTRUCTIONS FOR A RAIN GARDEN
Your property contains a stormwater management flow control BMP(best management practice)called a
"rain garden,"which was installed to mitigate the stormwater quantity and quality impacts of some or all
of the impervious or non-native pervious surfaces on your property.
Rain gardens,often described as"bioretention,"are vegetated closed depressions or ponds that retain and
filter stormwater from an area of impervious surface or non-native pervious surface. The soil in the rain
garden has been enhanced to encourage and support vigorous plant growth that serves to filter the water
and sustain infiltration capacity. Depending on soil conditions,rain gardens may have water in them
throughout the wet season and may overflow during majar storm events.
MAINTENANCE RESTRICTIONS
The size,placement,and design of the rain garden as depicted by the flow control BMP site plan and
design details must be maintained and may not be changed without written approval either from the King
County Water and Land Resources Division or through a future development permit from King County.
Plant materials may be changed to suit tastes,but chemical fertilizers and pesticides must not be used.
INSPECTION FREQUENCY AND MAINTENANCE GUIDELINES
• Rain gardens must be inspected annually for physical defects and sediment accumulation.
• After major storm events,the system should be checked to see that the overflow system is working
properly and sedimentation is not occurring at the inlet. If erosion channels or bare spots are
evident,they should be stabilized with soil,plant material,mulch,or landscape rock. Sediment
deposits should be carefully removed and the sediment source eliminated.
• A supplemental watering program may be needed the first year to ensure the long-term survival of
the rain garden's vegetation.
• Chemical fertilizers and pesticides must not be used.
• Mulch may be added and additional compost should be worked into the soil over time.
• Plant materials may be changed to suit tastes.
• Vegetation should be maintained as follows:
1)replace all dead vegetation as soon as possible;
2)remove fallen leaves and debris as needed;
3)remove all noxious vegetation when discovered;
4)manually weed without herbicides or pesticides;
5)to protect infiltration performance,do not compact soils in the bioretention cell with heavy
maintenance equipment and/or excessive foot traffic;
6)during drought conditions,use mulch to prevent excess solar damage and water loss.
RECORDING REQUIREMENT
These rain garden flow control BMP maintenance and operation instructions must be recorded as an
attachment to the required declaration of covenant and grant of easement per Requirement 3 of Section
C.13.4 of the King Gounty Surface Water Design Manual. The intent of these instructions is to explain to
future properiy owners,the purpose of the BMI'and how it must be maintained and operated. These
instructions are intended to be a minimum;the King County Department of Permitting and Environmental
Services(DPER)may require additional instructions based on site-specific conditions. See King County's
Surface Water Design Manual website for additional information and updates.
APPENDIX A MAINTENANCE REQUIREMENTS FOR FLOW CONTROL,CONVEYANCE,AND WQ FACILITIES
N1C�;31-81CfRE�'Et�t�N#�NlP
Maintenance Defect or Problem Conditions When Maintenance is Needed Results Expected When
Component Maintenance is Performed
Preventative Vegetation Vegetation to be watered and pruned as Healthy vegetation growth with fuil
needed and mulch applied to a minimum of 2 coverage as designed.
inches to maintain healthy growth.
Bioretention Area Trash and debris Trash and debris in the bioretention area;leaf No trash or debris In the bioretention
drop in the fall season. area.
Sediment Sediment accumulation in the bioretention area Water in the bioretention infiltrates as
accumulation interfering with infiltration. designed.
Ponding Standing water in the bioretention area for Standing water infiltrates at the
more than two days. desired rate.
Inflow Inflow not getting into bioretention; Unobstructed and properly routed
debris/sediment blockage at inlet features; inflow into bioretention area;inlet is
native soil is exposed or other signs of erosion stabilized and appropriately armored.
damage is present.
Overfiow outiet Overflow water not controlled by outlet Outlet features control overtiow;
features;native soil is exposed or other signs overflow is stabilized and appropriately
of erosion damage is present. armored.
Underdrain Underdrain is not flowing when bioretention Underdrain flows freely when water is
area has been infiltrating water. present.
Vegetation Plant health Plants not thriving across at least SO°/a of the Healthy water tolerant plants in
entire design vegetated area within the BMP; bioretention area,plants thriving
overly dense vegetation requiring pruning. across at least 80%of the entire
design vegetated area within the
facility.
Plant species Plants not water tolerant species. Plants are water tolerant.
Weeds Weeds growing in bioretention area. No weeds in bioretention area.
Watering Planting schedule requires frequent watering Plants are established and thriving
(approx.weekly Year 1,bimonthly Years 2 and
3)for new facilities,and as needed for
estabiished plantings or dry periods
Pest Control Signs of pests,such as wilting or chewed Plant community is pest-free when
leaves or bark,spotting or other indicators; following an approved Integrated Pest
extended ponding period encouraging Management plan;bioretention
mosquitoes functioning normally and ponding
controlled as needed for pest control
Containment Berm Erosion; Erosion occurring at earthen slopes or Erosion on the containment berm and
and Earthen Siopes containment berm side slope. side slopes has been repaired and the
cause of the erosion corrected.
Voids created by Voids affecting berm integrity or creating leaky Voids have been repaired;facility is
nuisance animals pond condition free of nuisance animals following an
(e.g.,rodents)or tree approved Integrated Pest
roots Management plan.
Settlement Any part of the containment berm top has less A minimum of 6 inches freeboard from
than 6 inches of freeboard from the maximum the maximum pond ievel to the top of
pond level to the top of the berm. the berm.
Amended Soil Soil nutrients Soil not providing plant nutrients. Soil providing plant nutrients.
Bare spots Bare spots on soil in bioretention area. No bare spots,bioretention area
covered with vegetation or mulch
mixed into the underlying soil.
Compaction Poor infiltration due to soil compaction in the No soil compaction in the bioretention
bioretention area. area.
Inspection Frequency Annually and after large storms,and as Bioretention facility is functioning
needed seasonally for pruning,plant normally;plant community is thriving
maintenance,pest control and to control leaf and pest-free.
drop,evergreen needles etc.
2016 Surface Water Design Manual—Appendix A 4/24/2016
A-39
APPENDIX A MAINTENANCE REQUIREMENTS FOR FLOW CONTROL,CONVEYANCE,AND WQ FACILITIES
NO.'��—CAfiGN 8�1S1NS ANb Ma4NN[>LE$
Maintenance Defect or Problem Condition When Maintenance is Needed Results Expected When
Component Maintenance is Pertormed
Structure Sediment Sediment exceeds 60°/a 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%,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 biocking 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
'/3 the depth from the bottom of basin to invert basin.
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'/<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 Top slab is free of holes and cracks.
or cracks wider than Y,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 is
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 Y,inch and longer than 1 foot No cracks more than'/4 inch wide at
at the joint of any inleUoutlet pipe or any the joint of inieVoutlet pipe.
evidence of soil particies entering catch basin
through cracks.
SettlemenU 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%s-inch at the joint of the No cracks more than'/,-inch wide at
inleUoutlet pipes or any evidence of soil entering the joint of inleUoutlet pipes.
the catch basin at the joint of the inieUoutlet
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 surtace oit film.
InIeUOutlet 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 inletloutlet No trash or debris in pipes.
pipes(includes floatables and non-floatables).
Damaged Cracks wider than Yz-inch at the joint of the No cracks more than'/.-inch wide at
inleUoutlet pipes or any evidence of soil entering the joint of the inleVoutlet pipe.
at the joints of the inleUoutlet pipes.
2016 Surface Water Design Manual—Appendix A 4/24/2016
A-9
APPENDIX A MAINTENANCE REQUIREMENTS FLOW CONTROL,CONVEYANCE,AND WQ FACILITIES
NO.S-CATCH BA►�INS,�ND MANH�.ILES
Maintenance Defect or Problem Condition When Maintenance is Needed Results Expected When
Component Maintenance is Pertormed
Metal Grates Unsafe grate opening Grate with opening wider than�/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
My 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 di�cult to One maintenance person cannot remove Cover/lid can be removed and
Remove cover/lid after applying 80 Ibs.of lift. reinstalled by one maintenance
person.
4/24/2016 20]6 Surface Water Design Manual—Appendix A
A-10
APPENDIX A MAINTENANCE REQUIREMENTS FOR FLOW CONTROL,CONVEYANCE,AND WQ FACILITIES
NO.4-CC?NTROL S'Ti�UCI'iJRElFLU1N REST'i21CTC�R
Maintenance Defect or Problem Condition When Maintenance is Needed Results Expected When
Component Maintenance is Pertormed
Structure Trash and debris Trash or debris of more than%cubic foot which No Trash or debris blocking or
is located immediately in front of the structure potentially blocking entrance to
opening or is blocking capacity of the structure structure.
by more than 10%.
Trash or debris in the structure that exceeds'/3 No trash or debris in the structure.
the depth from the bottom of basin to invert the
lowest pipe into or out of the basin.
Deposits of garbage exceeding 1 cubic foot in No condition present which would
volume. attract or support the breeding of
insects or rodents.
Sediment Sediment exceeds 60°/a of the depth from the Sump of structure contains no
bottom of the structure to the invert of the lowest sediment.
pipe into or out of the structure or the bottom of
the FROP-T section or is within 6 inches of the
invert of the lowest pipe into or out of the
structure or the bottom of the FROP-T section.
Damage to frame Corner of frame extends more than'/.inch past Frame is even with curb.
and/or top siab curb face into the street(If applicable).
Top slab has holes larger than 2 square inches Top slab is free of holes and cracks.
or cracks wider than Y,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 siab.
Cracks in walls or Cracks wider than Yz inch and fonger than 3 feet, Structure is sealed and structurally
bottom any evidence of soil particles entering structure sound.
through cracks,or maintenance person judges
that structure is unsound.
Cracks wider than%z inch and longer than 1 foot No cracks more than'/,inch wide at
at the joint of any inleUoutlet pipe or any the joint of inleUoutlet pipe.
evidence of soil particles entering structure
through cracks.
SettlemenU Structure 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%,-inch at the joint of the No cracks more than'/,-inch wide at
inleUoutlet pipes or any evidence of soil entering the joint of inleUoutlet pipes.
the structure at the joint of the inleUoutlet 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 surtace oil film.
Ladder rungs missing Ladder is unsafe due to missing rungs, Ladder meets design standards and
or unsafe misalignment,rust,cracks,or sharp edges. allows maintenance person safe
access.
FROP-T Section Damage T section is not securely attached to structure T section securely attached to wall
wall and outlet pipe structure should support at and outlet pipe.
least 1,000 Ibs of up or down pressure.
Structure is not in upright position(allow up to Structure in correct position.
10%from plumb).
Connections to outlet pipe are not watertight or Connections to outlet pipe are water
show signs of deteriorated grout. tight;structure repaired or replaced
and works as designed.
Any holes�ther than designed holes—in the Structure has no holes other than
structure. designed holes.
20]6 Surface Water Design Manual–Appendix A 4/24/2016
A-7
APPENDIX A MAINTENANCE REQUIREMENTS FLOW CONTROL,CONVEYANCE,AND WQ FACILITIES
N0:4-COMtRt,�L STRtJCT�lRElFLOW RESTfLICtOR
Maintenance Defect or Problem Condition When Maintenance is Needed Results Expected When
Component Maintenance is PerFormed
Cleanout Gate Damaged or missing Cleanout gate is missing. Replace cleanout gate.
Cleanout gate is not watertight. Gate is watertight and works as
designed.
Gate cannot be moved up and down by one Gate moves up and down easily and
maintenance person. is watertight.
Chain/rod leading to gate is missing or damaged. Chain is in place and works as
designed.
Orifice Plate Damaged or missing Control device is not working properly due to Plate is in place and works as
missing,out of place,or bent orifice plate. designed.
Obstructions Any trash,debris,sediment,or vegetation Plate is free of all obstructions and
blocking the plate. works as designed.
Overtlow Pipe Obstructions Any trash or debris blocking(or having the Pipe is free of ali obstructions and
potential of blocking)the overfiow pipe. works as designed.
Deformed or Lip of overflow pipe is bent or deformed. Overflow pipe does not allow
damaged lip overtlow at an elevation lower than
design
InIeUOutlet 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 inleUoutlet No trash or debris in pipes.
pipes(includes floatables and non-floatables).
Damaged Cracks wider than Yx-inch at the joint of the No cracks more than Y,-inch wide at
inleUoutlet pipes or any evidence of soil entering the joint of the inleUoutlet pipe.
at the joints of the inleUoutlet pipes.
Metal Grates Unsafe grate opening Grate with opening wider than'/e inch. Grate opening meets design
(If Applicable) 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
standards.
Manhole Cover/Lid Covedlid 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 di�cult to One maintenance person cannot remove Coverllid can be removed and
Remove cover/lid after applying 80 Ibs.of lift. reinstalled by one maintenance
person.
4/24/2016 20]6 Surface Water Design Manual—Appendix A
A-8
4
APPENDIX A MAINTENANCE REQUIREMENTS FOR FLOW CONTROL,CONVEYANCE,AND WQ FACILITIES
N�.3�p�TENTI�N i'ANKS AN�YAULTS
Maintenance Defect or Problem Conditions When Maintenance is Needed Results Expected When
Component Maintenance is Pertormed
Site Trash and debris 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 poliution 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.
Grasslgroundcover Grass or groundcover exceeds 18 inches in Grass or groundcover mowed to a
height. height no greater than 6 inches.
Tank or Vault Trash and debris Any trash and debris accumulated in vault or No trash or debris in vault.
Storage Area tank(includes Floatables and non-floatables).
Sediment Accumulated sediment depth exceeds 10%of All sediment removed from storage
accumulation the diameter of the storage area for Ya length of area.
storage vault or any point depth exceeds 15%of
diameter. Example:72-inch storage tank would
require cleaning when sediment reaches depth of
7 inches for more than%z length of tank.
Tank Structure Plugged air vent Any blockage of the vent. Tank or vault freely vents.
Tank bent out of Any part of tank/pipe is bent out of shape more Tank repaired or replaced to design.
shape than 10%of its design shape.
Gaps between A gap wider than%,-inch at the joint of any tank No water or soil entering tank
sections,damaged sections or any evidence of soii particles entering through joints or walls.
joints or cracks or the tank at a joint or through a wall.
tears in wall
Vault Structure Damage to wall, Cracks wider than Yz-inch,any evidence of soil Vault is sealed and structurally
frame,bottom,and/or entering the structure through cracks or qualified sound.
top slab inspection personnel determines that the vault is
not structurally sound.
InieUOutlet Pipes Sediment Sediment filiing 20%or more of the pipe. InleUoutlet pipes clear of sediment.
accumulation
Trash and debris Trash and debris accumulated in inleUoutlet No trash or debris in pipes.
pipes(includes floatables and non-floatables).
Damaged Cracks wider than%,-inch at the joint of the No cracks more than'/,-inch wide at
inleUoutlet pipes or any evidence of soil entering the joint of the inleUoutlet pipe.
at the joints of the inieUoutlet pipes.
2016 Surface Water Design Manual—Appendix A 4/24/2016
A-5
. •
APPENDIX A MAINTENANCE REQUIREMENTS FLOW CONTROL,CONVEYANCE,AND WQ FACILITIES
N4.3-t3E"T�N�lON'�ANKS AND VAULTS
Maintenance Defect or Problem Conditions When Maintenance is Needed Results Expected When
Component Maintenance is Pertormed
Access Manhole Cover/lid not in place Covedlid is missing or only partially in piace. Manhole access covered.
Any open manhole requires immediate
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. Seif-locking cover/lid does not
work.
Covedlid difficult to One maintenance person cannot remove Cover/lid can be removed and
remove cover/lid after applying SO Ibs of lift. reinstalled by one maintenance
person.
Ladder rungs unsafe Missing rungs,misalignment,rust,or cracks. Ladder meets design standards.
Allows maintenance person safe
access.
Large access Damaged or difficult Large access doors or plates cannot be Replace or repair access door so it
doors/plate to open opened/removed using normal equipment. can opened as designed.
Gaps,dcesn't cover Large access doors not flat and/or access Doors close flat;covers access
completely opening not compietely covered. opening completely.
Lifting Rings missing, Lifting rings not capable of lifting weight of door Lifting rings sufficient to lift or
rusted or plate. remove door or plate.
4/24/2016 2016 Surface Water Design Manual—Appendix A
A-6