Peer Redline Operation and Maintenance PlanSAMANTHA RIDGE
Prepared for:
Prepared by:
Operation 81 Maintenance Plan
Jack Long
The One Eleven Building
Auburn, WA 98002
(253)846-5756
August 14, 2007
Pete Swan
. ,c:'_
p`~,; ~ 6
ed
Re~ewtioo,
p~G~6
Reviewed by: Jeff McInnis, PE
PETRA ENGINEERING, LLC
535 Dock Street, Ste 213
Tacoma, WA 98402
(253) 752-7817
Project No: 06-036
Project Name: SAMANTHA RIDGE
Oper & Main -Samantha Ridge (08.14.07).doc
~".T~ E?~GIIv'BERING, LLC
b~SeOCXatREEf • 9111TE 21a ITACOMA 1 WA 188102 1 PIX)f1E (2S9)15Z-]01] I FAX (2ba)Tnd592 I N1NY.PETPAENO.NET
TABLE OF CONTENTS
STORMWATER FACILITY MAINTENANCE GUIDE 3
INTRODUCTION 3
What is Stormwafer Runotl? 3
What is a Slam Drainage System and how does it work? 3
What does Stormwater Runoff have to do with Water Quality 3
Ycur Stormwater Fatality 3
Who is Responsible for Maintaining Stormwaler Facilities 3
How to Use the Stormwaler Faclliry Maintenance Guide 4
Included in This Guide 4
A Regional Approach to S[onnwater Management 4
YOUR STORMWATER FACILITIES 4
FACILITY KEV 4
SITE PLAN 5
QUICK LIST fi
MAINTENANCE CHECKLISTS 7
Detention Pond Checklist 8
Control Structure Checklist 11
Catch Basin Checklist 13
Vortechs Model 2000 Checklist 18
Fencing/Shrubbery Screen/Other Landscaping Checklist 17
Grounds and Landscape Checklist 18
Drywalls, French Drains, and Downspout Checklist 19
RESOURCE LISTING 20
GLOSSARY 22
1
a~.,= Oa r..a, apGE?
I. STORMWATER FACILITY MAINTENANCE GUIDE
INTRpDUCTION
What is stormwater Runoff?
When urban and suburban development covers the land with buildings, streets and parking lots, much of
the native topsoil, duff, Trees, shrubs and grass are replaced by asphalt and concrete. Rainfall that would
have soaked directly into the ground instead stays on the surface as stormwaterrunoff making its way
into storm drains (including man-made pipes, ditches, or swale networks), stormwater ponds, surface and
groundwater, and eventually to Puget Sound.
What is a Storm Drain System and how does it work?
The storm drain system for most developments includes measures to carry, store, cleanse, and release
the stormwater. Components work together to reduce the impacts of development on the environment.
Impacts can include flooding which results in property damage and blocked emergency routes, erosion
which can cause damage to salmon spawning habitat, and pollution which harms fish and/or drinking
water supplies.
The storm drain system provides a sate method to carry stormwater to the treatment and storage area.
Swaies and ponds filter pollutants from the stormwater by physicalty settling out particles, chemically
binding pollutants to pond sediments, and biological/ycortverting pollutants to less harmful compounds.
Ponds also store treated water, releasing it gradually to a nearby stream or to groundwater.
What does stormwater Runoff have to do with Water Quality?
stormwater runoff must be treated because it carries litter, oil, gasoline, fertilizers, pesticides, pet wastes,
sediments, and anything else that can float, dissolve or be swept along by moving water. Left untreated,
polluted stormwater can reach nearby waterways where it can harm and even kill aquatic life. It can also
pollute groundwater to the extent that it requires treatment before it is suitable for drinking. Nationally,
stormwater is recognized as a major threat to water quality. Remember to keep everything out of
stormwater systems except the rainwater they are designed to collect.
Your stormwater Facility
Different types of ponds are designed for different purposes. For example, wet ponds primarily provide
treatment of stormwater. Ury ponds or infiltration ponds are designed to provide storage for stormwater
and allow for its gradual release downstream or into the ground. The private stormwater facility for this
project includes a water quality LCF vault, a stormwater retention vault, and a conveyance system to
collect site runoff from roadway~3, driveways, and roofs.
Who is Responsible for Maintaining stormwater Facilities? ~- l ,, ~, , '~
All stormwater facilities require maintenance. Regular maintenance ensures proper functioning and
preserves visual appeal. This stormwater Facility Maintenance Guide was designed to explain how
stormwater facilities work and provide user-friendly, straightforward guidance on facility maintenance.
You are responsible for regularly maintaining privately owned ponds, catch basins, pipes and other
drainage facilities an your property. stormwater facilities located in public rights-of-way are maintained by
local governments. The private stormwater facilities on this site will be maintained by a homeowner's
association.
~.~G. i ~. ii'
How to Use the stormwater Facility Maintenance Guide
This Maintenance Guide indudes a Site Plan specifc to your development and a Facility Key that
iden[Hies the private stormwater facilities you are responsible for maintaining. A °Oukk LISP of
maintenance aclivkies has also been included to help you Identify the more routine needs of your facility.
Included in This Guide
^ Comprehensive Maintenance Checklists That provide specific details on required maintenance
^ Pollution Prevention Tips That list ways to protect water quality and keep storm drain systems
functioning smoothly
^ Resources to provide more information and technical assistance
A Regional Approach to stormwater Management
II is important to educate and involve area residents in water quality issues and stormwater management.
stormwater runoff is a widespread cause of wafer quality impairment and stmam degradation. The
jurisdictions should work together with residents, businesses, community groups and schools to address
this problem. This guide focuses on providing information in ways that you can reduce stormwater
impacts through pollution prevention and proper facility maintenance.
YOUR STORMWATER FACILITIES
This section consists of Iwo parts that are to be used together: the Facfl/ty Key and the SHe Plan.
Review the site plan and identify the numbers denoting a feature of the system. Then check the facility
key for the feature type and checklist name.
FACILITY KEY
The stormwater facility in your neighborhood is comprised of the following elements:
Type of Feature & Checklist Nama Location on Site Plan
Detention Pond 1
Control StrucWre 2
Catch Basins 3
Vortechs Model 200 q
Fencing/Shrubbery ScreenlOther Landscaping 5
Grounds and Landsnpe fi
Drywalls, French Drains, or Downspouts See individual lot site plan.
'THE MAINTENANCE FOR THE VORTECHS MODEL 2000 IS AS REQUIRED BYTHE
MANUFACTURER. IT IS ANTICIPATED AND RECOMMENDED THAT THE HOME OWNER
ASSOCIAT/ON SIGN UP FOR REGULAR MAINTENANCE FROM THE PROVIDER OF THIS SYSTEM.
e.r ..o~
SITE PLAN
SAMANTHA RIDGE
. '~,
~,
RA
iNdIlVBBRIN6
Sfiti,ANT-.i RIDGE
QUICK LIST
The following is an ahhreviated checklist of the most common types of maintenance required. Please go
aver Ihls checklist after heavy reins. The list represents minimum maintenance to 6e pedormed and
should be cortrpleted in conjunction with the other checklists for an effective maintenance program.
O Inspect catch basin grates to see that they are not clogged or broken. Remove twigs, leaves, or
other blockages. Contact the local jurisdicllon to replace the grate if it is broken.
O Inspect inlet and outlet pipes for blockages. Clear all blockages.
O Inspect filter strip, swale and pontl walls (or erosion or cavetl in areas.
O Inspect riprap (rocks) al the inlets and outlets of culverts antl other pipes. If they are silted in or
eroded away, replace them.
.,n .,.,v?!U, Rt~Ci ~.,_. __.
MAINTENANCE CHECKLISTS
The Maintenance Checklists in this packet are for your use when inspecting the slormwater facilities on
your property. This packet has been customized so that only the checklists for your facilities are included.
If you feel you are missing a checklist, or you have additional facilities not identified or addressed in this
packet, please contact your kcal jurisdiction.
The checklists are in tabular format for ease of use. Each describes the area to inspect, inspection
frequency, what to Icok for, and what action to take. A log sheet is included toward the end of the chapter
to help you track maintenance of your storm drainage system.
Although i[ is not intended for the maintenance survey to involve anything too difficult or strenuous, there
are a few tools that will make the job easier and safer including:
^ Aflashlight
^ Along pole or broom handle
^ Some kind of pry bar or I'dting tool for pulling manhole and grate covers
^ Gloves
A resource list is included In the next chapter. Here you will fnd the phone numbers of the agencies
referred to in the tables, as wall as the contractors and consultants who designed and constructed your
facilities.
SAFETY WARNING: In keeping with OSHA regulations, you shcultl never stick your head a any part of
your body into a manhole or other type of confined spare. When looking into a manhole or catch basin,
stand above it antl use the flashlight to help you see. Use a long pole or broom handle to check sediment
depths in confined spaces. NO PART OF YOUR 60DY SHOULb BREAK THE PLANE OF THE OPEN
HOLE.
.~....~ ou_tam PFGE F
_... , ~.*~ ~~ ~i~a _<.
Detention Ponds Checklist
Dne
Drainage Condigon GOMdlon
Frequent SYatem Problem ato Shwd
Feature Orb O+e Ole (Oyer Check Far Facial
My vaan end debris
which excaeld 5 cudc
leer per 1,000 Square
feel (Mis k dbeul
equal b Me amlwnt °(
tla5h it NWkI take 1°
011 uv one slaMard
M
5 General Trash S Debris size garbage conj. In Trash and debris
, general, there should deamtl from site.
be rw visual evitletxe
of dumviip. It lass
Man Mreshdtl all Vash
and tlehrc will be
removed as pad O/
next scheduled
maintenance.
Arty poisonous or No dergsr Ot
nuisance vegeta[bn
~5°°0US vegaladon
wNCh may coretitule a Whne maimenance
hazard to Personnel or the pubYc
maimerence mght rermally be.
persomtel IX Me (Ceordmere wlM local
A General Poisorrola Vegetafion Wblic. Any evidence W°Bd board) Complete
and noxbus weeds of noxbus weeds as eradig4on of nozbus
defined by Sgle or weeds may mI be
bcal regul9Upns. possiM°'COmplunce
(APdY requirements of vnM Stara or brat
adopted IPM policies erediratbn policies
br the use of ~I~
_ hereltldes.
N° f.Mlemirenta or
Any evgencemoih pONUtanb present
M
S General Canwminants and gasolino, (COerdina[e
. POllueon mnlaminanh or od+er removaVGeanup vnM
pallutann bcal wrier quaky
response ency).
RadBllt6 deskoYetl
Any evidence Of and tlam err berth
radenl txaea it facinty repa4ed. (Ceadinaro
is actirg as a dam or vnM bcal healM
M General Rodent Motes berm, or any evidenrs deparbnem:
of water piping roertlinate with
Mrough dam a berm Ecology Dam Safey
a rodent hdes. Olrrx it paM exceetls
10 aue-Iasi
Faulily b ralumed ro
tlesign lurlctlon.
Dam results in change (Coordinate Irappirg
M General Beaver Dams or Mctbn of Ina of beever9 arW
(dCilly. RYnWal df dam5 W1111
appmpdale permilOng
_ age~nas)
When insects such as Insects destroyed or
wasps end homed remOretl fran site.
A General Insec6
htedere wiM Apply lnsectidtles in
maintenance adivi4e5 complunce wiM
. adopted IPM Pdlaes_
Tree grovM does rot
allow maiMenarre Trees do rot hiller
accesswinlederes maintenance activities.
Tre¢ Gravth all vdth mainlwunca Hanrestetl trees
q General
Hazam Trees adivily (i.e., slope shoub tie recyGed
mowing, silt ratmvel, inro mulM waNer
vactorirg, w berefitlal uses (e.g.,
agwpment alders lw Prewootl).
movements. II
11 deatl, mseaseq or tlyirg
Dees are identified (Use a
A General realfietl Arborist to Remove Hazard Trees
tlelemline healN o} Vee or
removal requirements)
Eratletl damagaover slopes shWtl be
2lnches tleep vArere slebilizetl using
rouse of aamageb aPPmpnate eroson
M Side Sbpea o(Pmd Erosion still presentwwhae Q1^trol measwe(sj;
there is patmtlal br e.g., rock
f&nfprcemenl, planting
continued eroslort of grass, compaction.
It arosien is eccumng on
Any erosion observetl ono compacletl bermsallcereatl
M,S SMe Sbpes of Pond compacted berm civil engineer eM1Ad be
embankment consulted to remlve source
e/ erosion.
Auamubted sediment
Mat exceeds l0°k
'
' Sediment leaned out
(typically 8
b 12
j M b designed Pond
the tlesignetl ppnd shape and tlapm;
M Storage yvea Sediment tlepN Unless pclp reseetled if
olharwise apatlfieda namssaryrocontrol
agec6 inleltlng or
outlaMng toMition of erosicn.
the tadli .
_ Llner is visible all Has Liner repairetl or
M Slcrage Area liner (Il Applicable) more tianlMae l/4 repbred. Llreris luny
irM hdes in it. covered. _
AnY Pert of berm
wRlkh has seined 4
inMes Icier flan the
tlesgn elevatlm. If
selnement is apparent
measure berm to
aete~ml~ amourc nr
A Poll Berms (Dikes) Settlements sanlemenl. Seining Dike is hilt bark to
wn be an inaipation cf the tlesgn elevation.
mOIB 58VH¢ prpt118m5
witn Ue eem, w ounet
wmMS. A licensed evil
enginew shout be
mnauned to determine
tiro source of tna
_ senlement
Disrnruble water sow
Mrough poll berm.
ongpng erasim wiN
potential fw wosbn to
mnfinue. Piping MMkrabW.
A Poll Berms (Dikes) Piping (Racommenda Eroabn pMennal
Gaeteennbal engineer resavetl.
be vRed in ro Irapect
and evaluate condition
all remmmerd mpalr
of ceMinan.
Trees 6lquld be
removed. II root
Tree 9~b an sYSlem h small (pass
emergency sPllkirdys less Man4ixhesl gre
aesMS blockage root system may ba
A Emergenq OVerflowl
Tree ~a~h praplemsaM may Tart in place. Othervrise
the roots should pe
Spllway Pause failure of the removed and lha perm
berm due to restored. A licensetl
umm~lrolled dull ergineersnaultl
overtopplrg. ba aoasultetl far
proper bermhplliway
restoratbn.
only ore HYer of rock
exisks above native
soil In area flue 54uare
Emergency fNerflowl Emergency Overflow! /em or larger, or aM Racks arM pad tleplh
A Splrway ShcNray exposrxeAnalrve soil are reslaretl to design
et dre lop of out flow standartls.
paM or sPilMey. (Rip-
mp aninside slopes
need not be replaced.
(M) Monthly from November Through April.
(A) Once in late summer (preferably September)
(S) After any major stone (use 1-inch in 24 hours as a guideline).
`iHA 31JQE 21t'] L' .? .
Control Structure/Flow Restrictor Checklist
wtr
pralnage Condi[bn f.OlldltOn
Freq~enc Syalem Problem aW
Feature
~~ ~~
Ow ~~
CMCk FOr S ouM
Exlet
Matedal ezceetla Control slrucNre
M General Trash and Debris 25%of sump tleDlh orilke is rot
(Includes Sediment) or 1 foot below blocked. All trash
orifice plate. and detxis removetl.
SbucWre is not SlrucWre securety
A General SWCWraI Damage severely attached to attached W wall and
manhole wall. ougd pipe,
S WcWre is not In
A
General
Stmctural Damage upright positlon SWdurO in Correct
(allow up la lg% position.
from plumb .
Connections W
Connecions [o outlet pipe are water
A General SWdaral Damage outlet pipe are not fighh structure
watertight and show repalretl or replaced
signs o! rust. and works as
de " ned.
Any holes-other Structure has no
A General SWCtufal Damage than desgned holes other than
holes-in tae designed hdes.
sWClure.
Damaged or Cleanout gate is no[ Gale is wateNghl
A Cleanoul Gate Missing watertight oris end works as
miss) dasi natl.
Gate cannot be Gate moves up and
A Cleanoul Gale ~^~~ °r moved up and down down easity and is
Missing by one maintenance
watedgM.
arson.
Damaged or ChaiNrod leading to Chain is in place
A Cleanoul Gate
Missing gate is micsirg or and wo@s as
dame eo. dasi ned.
_
Damagetl or Gate is rusted over Gate is repaired or
A Cleanoul Gale Missing 50%of its surface replaced to meet
area. tlesign standards.
Control device is
Damaged or not working propedy
plate is in place antl.
A Orifice Plate Missing tlue to missing, oN works as desgned.
of place, or Dent
odfice ate.
Any trash, debds, plate is free of all
M,5
Orifice Plate
Obstructions setliment, or
obsWCtions and
vegetation blocking works es desgned.
the late.
Any Iresh ar debds
blacking (or having Pipe I8 fre9 of all
Overflow Pipe ObsWCtions tae polenUal o! obsWCtlons end
blorking)Ihe works as designed.
avefiow i e.
Cover is missing w
ony partially in
A Manhole Cover Not In Place place. Any open Manhole is closed.
manhole reguires
maintenance.
Mechanism cannot
he openetl by one
maintenance
person with ProPw
A Manhole Locking Mechanism tools. Bobs into Mechanism opens
Not Working frame have leas with proper tools.
than t/2 inch of
thread (may not
appy b seluxking
Ilds .
One maintenance
person cannot
remove lid after Cover can be
Cover Difficult la applying normal removed and
A Manhole Romove lifting pressure. reinstalled by one
Intenlis to keep maintenance
coverirom sealing person.
oft access to
maintenance.
Ladder is unsafe
due to missing Ladder meets
A
Manhole Ladder Rungs NOgs'
misalignment
not desyn standertls.
Unsafe ,
6awrely attached to Allows maintenance
sbucture wall, Nsl, person safe acca66.
or cracks.
(M) Monthly from November through April.
(A) Once in late summer (preferably September)
(S) Aker any major storm (use 1-inch in 2a hours as a guideline).
Catch Basins Checklist
FREOUENDY DRAINAGE
SYSTEM
DATE
PROBLEM CONDITIONS TD CHECK DONDITH)NS THAT SHOULD
FEATURE Fay EXIST
A General 'Dump rw Stencil or cramp shouts ba Warning signs (e.g.,'DUmp No
polulants' viaida and easily reatl. Waste-0reinsbStream')shall
Stermil or DB painletl or ambpssetl on Or
stamp mt aQacenl to all storm burin
Wsible Irde1S.
M,S Genlml TmshB Trash or debris which is No trash prdebds baled
Debris krared knmetllabdy in frwd of Immedialetyin lranl o/catch
da: with basin opening wis Oasin or on grant gpenirq.
docking inladirg cepadty 01
the basln0 more than l0%.
M General TrzshK Trash pr tlatMS (in the basin) No trashwdebris in the cstdr
Debris Thal exceetls 80 pennant of dg basin.
sump depth as meazurcrl horn
the Ootlom d basin tp irrven W
Iha lowest pipe Into w out Of
dra bash, but in rro case Ies
Than a minimum of six inches
cleamrce hen Ne tlebec
surtace b Me imerl of Ure
lowest i
M Genaml TrashB Trash or babas in arty Watw Inlelarq paler pipes tree of
Debris oudet pipe docking mesa than dash wtledris.
tl3 0/Its height.
M General Trash3 Deaf enamels pr vegeladon No tleatl animals wvegelatlon
Debris Ihat mub gerlemle otlars drat present widen the retch basin.
rnub cause mmptaln6 or
tlangerpos gases (e.g.
methane.
M General Setllment Setlimentlin the baein)thal Pb sediment in the retch
exceeds fi0 percent of the basin.
sump tlepth as meawretl dour
the twdom of basin to invert of
the lowest pipe iota pr out of
the basin, put in ro rase less
Ihan a minimun o181nches
doararcs from Iha sBOlmenl
surface b N¢ invM of the
bwest I e.
A Gerreral SducWre Top slab has holes larger then Tep slab is dee of hble9 antl
Damage to 2square inches wcrarks wacas.
dame sondes wider than'/. inch Qntent is ro
Top Slab make swe nc matenala
-
- morning inb hasin)
A General Structure Fmme not silting flush pn top Fama N sining Oush on are
Damage to slab, i.e., separation olmore rser rings estop slab ant
Frame and/or Bran : inrn a/ are frame Irom ermly altachetl.
Top SIa0 the top sbb_ Frame rot
sacurey adacrgtl.
Catch Basins Chackllat (Continued)
A Ganerel Fractures or Malntmance persOnlutlges Basin replaced or repairedb
Cracks in tlrat svuctura is unsouM. design stardards.
Basin WaIN/
Bottom
A General Froctves w Goul fillet has separot¢tl Or Piper s regroutetl and secure
Crack6ln Gack¢tl witler than'/:Intlr end al basin will.
Basin Walls) longer thantlrolat UeidMd
Bolbm arty WeVOUtlet pipe or any
evdenca of soil particles
entering mtch basin through
dads.
A General BettlemenV II hdllure of basin has created a Baaln reptacetl a repairetl to
Mlsalignrt¢M safety, hNldipn, or design tlesyn stardads.
mblam.
M General Vegeretbn Vegetation growing across antl No vegetation bladdng
bbcking more than s0%O(Ne openkg t0 basin.
basin o coin .
M General Vegeta40a VagetalbngrovArg in No vegelagonarootgrewlh
InlaVOUtlel pipe jamb that is present.
mac Than six irldres tall ant
bss uan six inches span.
M General Gonlemlm(b Any evMenm ddl. gasoline. No mntamirunls or poNUtarlS
n antl contamirenls or dhar present.
Pollution pollutants (Coordinate
rHfIOVeVCleanup with bWl
water guality response
a enc
A Catch Basin Cover rwtln Cover is missing or ONy Any open mph basin renulres
Cover plain partially in place maintenance. Catch basin
rover is tlosed.
A Catch R~Sin Lodeg Mechanism cannot be Opened Mechanism Open3 with proper
Cover Medrarlsm by one maintenance person tads.
Not Working with proper (ooB. Bolts into
hams have lesg Man'/, Inds of
Ihr~tl.
A Catch Basin Cover One maintenance parson Cover mope removed by one
Cover DiN Il to cannot remove litl agar malnlenanm person.
Remove applying normal IiNng
pressure. (Intent is keep rover
hom sealing oaaccess to
meimenance.
A Ladder Laddm ladder is unsafe tlue to Ladtler meets design
Rungs missing rungs, rot securery standards ant albws
Unseen altatlretl to basin wall, maintenance person safe
misakgnment, rust, aatlcs, or access.
shar etl es.
A Grates Grate Grate with opening caber than Grate Opening meals tlesgn
Opening ]B Inch. standards.
Unsafe
M,G Grolos TrashB Trash and tlebrs )het la Grote free of (rash and debris.
Debris Obckvg more ttwn 20% OI
grate sudaca inletlirg mpadly.
BZ.;~_. °F r= ..
Catch Basins Checklist (Continued)
A Gates Damaged or Grab mkeing or WOMen Gale is in placean4 meets
Missing memba(s)of the grata. design stan4aNS.
If you are unsure whether a problem exists, please contact a Professional Engineer.
Key
(M) Monthly from November through April.
(A) Once in late summer (preferable September).
(S) After any major storm (use 1-inch in 24 hours as a guideline).
-... ..,~_ ..,,. .a o.
Vortechs Stormwater Treatment System Checklist
Oats
Frequent Dralnaq GantllMn Contlltbn
s That
y System Problem ato gMUltl
Faalure ~~ m,~ Du, ~~ CMCk FOr Fxlst
Sediment deplh5 Accumulated
M
S General Sediment wigMin B"ofdry sedimen[shouMM
, accumulation weather water rertmved.
surface elevation.
Trash and debds
accumulated in Tash and debris
M
5 General Trash and Debris vault, or pipe removed from vault,
, Accumulation inladoutlat, antl InbVPUtloI
goatables antl non- pipirg.
goatables.
Oil is exhacletl from
vault using
Oil accumulation vacladng methods.
that exrNede f-inch Coalesang plates
M,S General Oil Accumulation a[the water are cleaned q'
suface. moroughly rinsing
and gushing. Should
be no visible dl
demon water.
Intel or oNlet piping
A Slrudure Damaged Pipes damaged or hroken Pipe repaired and or
arM in neetl of replaced.
re air.
Bafges cortotlirg,
cracking, warping
and/or showing Bafges repaired or
A Strvclum Baffles signs of fagure as replaced to
determined by specificagons.
maintenancelinspec
lion ersgn.
Cracks wider man
1/2-inch or evidence
VaultSWcWre of soil particles yaNl reDlaDed or
Damage -Includes enledng Iha
sauclura through repairs matle so
A
Structure Cmcks in Walls,
me sacks, or melveug meets
Bottom, Damage W
maintenance/inspec design
Frame and/or Top
lion personnel specmcabons and is
Slob
delertnine that me slmclurally sound.
vault is not
sirudural sourW.
Vault StrucWre Cracks witler than
Damage - Includoe V2-inch at the joint Vault repaired w
Cracks in Walls, of any InleVoutlet that no sacks axial
A SaucWre Bottom, Damage to Pipe or evidence of wider than 7/4-inch
Frame and/or Top soil partides et the joint of the
Slab enladrg mrough the inletlautlet pipe.
cracks.
Pencing/Shrubbery Screen/Other Landscaping Checklist
FREOUENCV DRAINAGE
SYSTEM
DATE
PROBLEM CONDITIONS TO CHECK CONDUIONS THAT SNOULO
FEATURE FOR
_ E%IST
M General Missing er Any defeG in the lance or Fence is meMetlashmbs
broken parlsl screen that permits easy entry replaced m loan a solid hanier
dead b a hGlity. to entry.
shrubbe
M,S General Erosion Erosion has resulted in an Replace soil under fence so
openirg uMer a lance Mat Mat no opening esceetls
allows en ep le or eh. inche8 in helghL
M General Unruy ShMbery is growing put of Shrubbery is lnmmad6M
vegehHon control or is infaskd vAM weeded M provide appealing
weeds. aesthetic. Dp not use
chemicals to contra weeds.
A Fences Damaged Posts out of plumb more Itun Posts qumb m wiMin 1-12
pads 6incnes. inches o(plumb.
A Fences Damaged Top rolls Dent more Hmn6 Tap raiUree al herds greater
parts inches. Hon 1 inch.
A Fences Damaged Any pan al knce (irduding Fence i4 aligned and meets
parts posh, tap rails, aM fabdc) desgn standards.
more than 1 hot out adesign
611 ant.
A Fer6.es Damaged Mlsslrg or loose lensbn ware. Tension wire in place and
pans holding fabric.
A Fences Damaged Missirg or boss barbed vAre Barbed wire in pbce with less
pans Ma[is sagging more Man 2.12 Than'/.-Inch sag between
inches behveen pasts. posts.
A Fences Damegetl Esterwbn arm m'ssing, Extension arm In place wiM rm
parts broken, ar bent outashape bends larger Man Sinch.
are than 1421nrhes.
A Fences Detedpmtaa Pan ar pads Mat have rusting $kuctpmlly adequate posts or
paint ar orscaling cantlitlan Mat has parts vAM euahrm protective
pmtedive afleGatl slmGUrel adequacy. mafirg.
twang
M Fences Openings In Cpenings in latrb are such tb openitgsln fabric.
fabric that an eJnrh aameler ball
reuld fit M n.
If you are unsure whether a problem exists, please contact a Professional Engineer.
K
(M) Monthly from Novemher Through April.
(A) Once in late summer (preferable September).
(S) After any major storm (use 1-inch in 24 hours as a guideline(.
~ ,TI ^.G.>E ~r ~~.
Grounds and Landscape Checklist
FREQUENCY DRAINAGE
SYSTEM
DATE
PROBLEM CONDITIONS TO CHECK CONDITIONS TNAT SHOULD
FEATURE FOR EXIST
M General Weetls Weetls growing In more than Weeds presets in less Manb%
(rronpdsonou 20%ot the landscaped area oI Ma WMSCapad area.
5 trQeS drld sIINh4 M .
M General Inse4 hazard Any presence of pois¢n ivy or Np poisonous vegeation or
other poisomus vegetation a iraxi pasta present in
_ insect ts. IeMSra area.
M,S General Trash w Ndar See Pords Checklist See Pad3 Checklist
M,S General Erosbn of NoticeablB rills are seen in Causes of mosion are
Grormd landscaped areas. Idantlried and steps are taken
Sudace Io sbw OevMSpread out Me
water. Eretletl areas are filled.
wnloured, aM seeded.
A Trees and Damage limbs ar pads Cf Vees or TNn trees/shrubs to reWOr¢
shrubs shnMS [hat are spill orbrokan slope. Replace tre~IShrWs
vMch affect more Man 25%at vAM severe damag¢.
the total fillage of the tree or
Shrub.
M Trees and Damage Trees gr shrubs Mat have Replant tree, inspectirg for
ShMS keen bbwn tlown or klwrketl inl W b sl¢m or roots.
mer. Replere if sever dame
A Trees and Oamagn Trees or shrubs wNGCh are nal Place &ake3 aM rubber-
shrobs adequately supponed care reared ties arountl young
leaning over, calalrlg V¢eslshruhs for supDOd.
exposure of Ma roots.
M you are unsure whether a problem exists, please contact a Professional Engineer.
Kex
(M) Monthly from November through April.
(A) Once in late summer (preferable September).
(5) After any major storm (use 1-inch in 24 hours as a guideline).
Drywalls, French Drains, or Downspouts Checklist
INSPECTION
AREA FREOUENCV LOOK FOR ACTION
Downspout Annually Water overflowing Tram the First clean the gutters and
downspout over the ground. downspouts. If this doesn't
solve the problem, a larger
d II ma 6e re Wred.
Roof Annually Moss and algae taking over the Disconnect flexible part of the
shadier parts of the shingles. downspout leading to the
drywall. Remove moss.
Pressure washing or use of
fatty acid solutions instead of
highly toxic pesticides or
chlorine bleach is preferred.
Install a zinc sVip as a
reventative.
RESOURCE LISTING
If you suspect a problem ezisls, please contact your local jurisdiction at one cf the numbers below and
ask for Technical Assistance.
Contact Numbers:
City of Yelm Public Works (360) 458-8406
WSU Cooperative Extension (253) 798-7180
Developer Information:
Client Name Jack Long
Address The One Eleven Building
Cily, ST Zip Aubum, WA 98002
Phone (253)846-5756
Engineer's Information:
PETRA ENGINEERING
535 Dock S[reet - Ste. 2t 3
Tacoma, WA 98402
(253) 752-7617
LOG SHEET
Use log sheets to track maintenance checks and what items, tl any, are repaired or altered. The
completed sheets will serve as a recent of maintenance activity and will provitle valuable information
about how your facilities are operalirg. Log sheets should be kept in a dry, readily accessible place.
GLOSSARY
BEST MANAGEMENT PRACTICE (BMPJ_- Structures, conservation practices, nr regulations that
improve quality of runoff or reduce the impact of development on the quantity o1 mnoff.
61gFILTER (SWALEI -A wider and flatter vegetated version of a dikh over vmich runoff gown al uniform
depth and velocity. Bloflters pertorm best when vegetation has a thick mat of roots, leaves, and stems at
the soil imedace (such as gmssJ.
BIOFILTRATION -The process through which pollutant concentrations in mnoR are reduced by filtering
runoff through vegetation.
OFFER -The zone that protects aquatic resources by providing prolechon of slope stability, attenuation
of runoff, and reduction of landslide hazards. An integral part of a stream or wetland ecosystem, it
provides shading, input of organic debris, and coarse sediments to streams. It also allows room for
variation in stream or wetland boundaries, hahllat for wildlge, and protection Trom harmful intrusion.
CATCH BASIN - An inlet for stormwater set into the ground, usually rectangular and made of concrete,
and capped with a grate Ihat allows stormwater to enter.
CHEC OAM -Adam (e.g., rock, earthen, log) used in channels to reduce water velocities, promote
sediment deposition, anNor enhance infiltration.
COMPOST STORMWATER FILTER - A treatment facility Ihal removes setliment and pollutants from
stormwater by percolating water through a layer of specially prepared bigleaf maple compost.
CONSTRUCTED WETLAND - A wet pond with dead storage at vaned depths and planted with wetland
plants to enhance its Vealment capabilities.
CONTROL STRUCTURE fFI.OW,RESTRICTORI - A manhole and/or pipe sWCturewith a flow-regulating
or metering device such as a weir or plates with small holes known as onfces. This structure controls the
rate at which water leaves the pond.
CONVEYANCE -A mechanism or device for transporting water including pipes, channels (natural and
man-made), culverts, gutters, manholes, etc.
CRITICAL AREA -Areas such as wetlands, streams, steep slopes, etc. as defined by ordinance or
resolution 6y the jurisdiction. Also known as °environmentallySensitive areas "
CULVERT - A conveyance device (e.g., concrete box, pipe) that conveys water from a ditch, Swale, or
stream untler (usually across) a roadway or embankment.
DEAD STORAGE -The volume o1 storage in a pond below the ou0e1 that does not drain after a storm
event. This storage area provides treatment at Iha stormwater by allowing sediments to settle out.
DETENTION FACILITY -A facility (e.g., pond, vault, pipe) in which surface antl storm water ¢ temporarily
stored.
DETENTION POND -A detention facility in the form of an open pond.
DIS_P_ERSION TRENCH -An open top trench glled with dpraD or gravel that takes the discharge from a
pond, spreads it out, and spills (bubbles) the flow out along its entire length. Dispersion trenches are
used to simulate'sheet flovV' of stormwater from an area, and are ogen used to protect sensitive adjacent
areas, such as wetlands.
DRAINAGE SYSTEM -The combination of Best Management Practices (BMPS), conveyances,
Treatment, retention, detention, and ouffall feaNres or SVucNres on a project.
DRQP STRUCTURE - A structure for dropping water to a lower elevation antl/or dissipating energy. A
drop may tie vertical or inclined.
_- ___
,:pJTF, _.,E ]sJ .._ _. _ .. _~..
DRY POND - A detention facility that drains completely after a storm. This type o/ pond has a pipe outlet
at the hottom.
EASEMENT -Aright afforded a person to make limited use of another's real properly. Typical
easements are for pipes or access to ponds, and may be 15 to 20 feel wide.
EMERGENCY OVERFLOW OR SPILLWAY - An area on the top edge of the pond that is slightly lower in
elevation Than areas around it. This area is normally lined with riprap. The emergency overflow is used
only rf the primary antl secondary outlets of the pond fail, in the event of extreme storms, or if the
iMiltm[ion capability of [he pond becomes significantly diminished. H the emergency overflow ever comes
into play, it may indicate the pontl neetls to be upgraded.
ENERGY DISSIPATER -A rock pad at an outlet designed to slow the velocity, spread out the water
leaving the pipe or channel, and reduce the potential for erosion.
FREEBOARD -The vertbal distance between the design high water mark and the elevation of the top of
the pond. Most ponds have one to two feet of freeboard to prevent them from overflowing.
INFILTRATION -The soaking of water through the sail surface into the ground (percolation). (Many
ponds are designed to fully infilhate stormwater, and thus do not have a regulady used discharge pipe.)
INFILTRATION FACILITY (or STRUCTURE) - A facility (pond or trench) that retains and percolates
stormwater into the ground, having no discharge (lo any surface water) under normal operating
contlilions.
JUNCTION -Point where two or more drainage pipes or channels converge (e.g., a manhole)
JURISDICTION -Olympia, Lacey, Tumwaler, or Thurston County (as applicable).
LINED POND or CONVEYANCE - A facility, the bottom and sides of which have been made impervious
(using, far example, a plastic liner or clay/silt soil layer) to the hansmisswn of liquids.
LIVE 570RAGE -The volume of storage in a pond above the oudet that drains after a storm event. This
storage area provides good control and habitat protection for nearby streams.
MANHOLE -A larger version of a catch basin, often round, with a solid lid. Manholes allow access to
undergrountl stormwater pipes for maintenance.
NATURAL CHANNEL -Stream, creek, river, lake, wetland, estuary, gully, Swale, ravine, or any open
conduit where water will concentrate and gow intermittently or continuously.
OIL-WATER SEPARATOR - A structure or device usetl to remove oil and greasy solids from water. They
operate by using gravity separation of liquids Ihat have different densities. Many catch basins have a
downlurned elbow that provides some ail-water separation.
OUTFACE -The point where water flows from amen-made conduit, channel, or drain into a water body or
other natural drainage feature.
RETENTION FACILITY -An infiltration facility.
RETENTION POND - A retention facility That is an open pond.
REVETMENTS -Materials such as rock or keystones used to sustain an embankment, such as In a
retaining wall.
RIP RAP -Broken rock, cobbles, or boulders placed on eadh surfaces, such as on top of a berm (or the
emergency overflow, along steep slopes, or at the outlet of a pipe, (or protection against the action of
water. Also used for entrances to construction sites.
RUNOFF- Stormwater.
SAND FILTER -A treatment facility that removes sediment and pollutants tram stormwater by percolating
water through a layer of sand.
_..aa.cr -,._ ~ _
STORMWATER -That podion of precipitation that falls on property and that does not naturally percolate
into the ground or evaporate, but fbws via ovedand flow, channels ar pipes into a defined surtace water
channel, or a consbucted infilUation facility. Stormwater inGudes washdown water and other wastewater
that enters the drainage system.
SWALE - A shallow drainage conveyance with relatively gentle side slopes, generally with flow depths
less than one foot. This term Is used interchangeably with "BIOFILTER'.
TRASH RACK or BAR SCREEN - A device (usually a screen or bars) that fits over a pipe opening tc
prevent large dehris such as racks or branches from entering and partially blocking the pipe.
WET POND - A stormwater Uealmenl pond designed with a dead storage area to malnlain a continuous
or seasonal static water level below the pond outlet elevation.
c,,.:.. c~ ,~.....,