HomeMy WebLinkAbout20060929003842 STORM EASEMENT 092906Return Address:
City of Auburn
City Clerk
25 West Main
Auburn; WA 98001
9003842
TIT EAS 57.00
026
. WA
Above this line reserved for recording information.
STORM WATER EASEMENT AND MAINTENANCE AGREEMENT
WSo&3-'" FAC05-0013
Reference # (if applicable): N/A
Grantor/Borrower: Joseph and Susan Simmons
Grantee/Assignee/Beneficiary: City of Auburn
Legal Description/STR: NW Y4 S19 T21N R5E WM
Assessor's Tax Parcel ID#: 314160-0430; 0431; 0555
THIS EASEMENT AND AGREEMENT made and entered into this day of
. )F-,D A-m b P- , 2006; by and between the City of Auburn, a municipal corporation
of King County, Washington, hereinafter referred to as "CITY" and Joseph and Susan
Simmons hereinafter referred to as "PROPERTY OWNER".
WHEREAS, PROPERTY OWNER has applied for certain permits with the CITY
for the construction of facilities for Simmons Property Improvements located at 102, 106,
& 114 11"' St. SE, which create impervious surface; and
WHEREAS, the PROPERTY OWNER will complete a storm system; and
WHEREAS, the PROPERTY OWNER and the CITY desire that the storm system
be maintained to provide adequate facilities for controlling both the quantity and quality of
storm drainage; and
WHEREAS, for maintenance of a storm system it is necessary to have appropriate
right-of-way to bring in equipment to conduct maintenance functions; and
WHEREAS, maintenance requirement is a covenant running with the land and
binding upon all heirs, successors and assigns of both parties; and
WHEREAS, the parties desire that this Agreement be recorded to advise heirs,
successors and assigns of both parties as to the existence of this easement and agreement;
and dMINIMM(S) were feed IN
new by Ixaclfie Ner*W9W :R"=
Storm Water Easement and Maintenance Agreement won ortly. It has not been
Page 1 of 26 exw inn as to proper exeougon or
EXCISE TAX NOT REQUIRED Eie to fts upon +ttie
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WHEREAS, an easement is needed to bring in maintenance equipment; and
WHEREAS, the parties are both desirous of permitting inspection of the storm
system to make certain that it is functioning properly and for purposes of determining the
appropriate repairs.
NOW, THEREFORE, BASED UPON MUTUAL COVENANTS TO BE
DERIVED THE PARTIES AGREE AS FOLLOWS:
Section 1, EASEMENT
PROPERTY OWNER hereby provides a non-exclusive easement to the City for
access, inspection, and maintenance for the purposes of this Agreement and the attached
Storm Water Pollution Prevention Plan, over, under and on that real estate described in
Exhibit "A" and on that portion of the property as showing on the approved Record
Drawings revised pursuant to construction records for the City of Auburn under Permit No.
FAC05-0013, which record drawings are hereby incorporated by reference as if set out in
full. This easement shall be a burden to that real estate which is legally described and
attached as Exhibit "A" and incorporated herein by this reference, and shall be a benefit to
the City Storm Drainage Utility System,
Section 2, HEIRS, SUCCESSORS AND ASSIGNS
This Agreement shall be binding upon the heirs, successors and assigns of the
parties.
Section 3, MAINTENANCE
The PROPERTY OWNER. agrees to maintain the storm system in accordance with
the ordinances and all applicable codes of the CITY and the Storm Water Pollution
Prevention Maintenance and Operation Schedule attached as Exhibit "B" and incorporated
herein by this reference. The PROPERTY OWNER does hereby agree that the CITY may
enter onto the property of the PROPERTY OWNER via the easement described above to
inspect and perform necessary maintenance if, after the PROPERTY OWNER is given
notice to maintain, the PROPERTY OWNER fails to maintain. Further, the PROPERTY
OWNER agrees the CITY may enter onto the property of PROPERTY OWNER via the
easement described above to perform emergency maintenance in the event of the storm
system's failure which might result in adverse impacts(s) on public facilities or private
facilities of other property owners. In both events the PROPERTY OWNER agrees to
reimburse the CITY for the costs incurred by the CITY in maintaining the storm system.
Should the CITY incur attorney's fees and/or costs in enforcing the agreement and/or in
Storm Water Easement and Maintenance Agreement
Page 2 of 26
maintaining or collecting maintenance fees, the PROPERTY OWNER agrees to pay
reasonable attorney's fees and all costs incurred by the CITY.
Section 4, ACKNOWLEDGMENT OF OTHER ENFORCEMENT ACTIONS
PROPERTY OWNER acknowledges that there may be liability for violations of
codes that could result in additional fines and/or the possibility of incarceration in addition
to the fees for maintenance should violations occur.
EXECUTED as of the date first written above.
Ow er Date
= el t 1461n1rM-
Owner Date
STATE OF WASHINGTON) OFFICIAL SEAL
Celia Marie Warren
} ss Notary Public
COUNTY OF KING } State of Washinator
I certify that I know or have satisfactory evid cc tha ~ `
and
is/are the person(s) who appeared before me, and said individual(s) acknowledged that
he/she/they signed this instrument and acknowledged it to be his/her/their free and
voluntary act for the uses and purposes mentioned in this instrument.
Dated
Notary Public i i and 'o ie State of Washington
Residing at
My appointment expires
Storm Water Easement and Maintenance Agreement
Page 3 of 26
CITY OF AUBURN
1! -/cr - vG
m Carlaw, Storm Drainage Engineer Date
STATE OF WASHINGTON)
)ss.
County of King )
I certify that I know or have satisfactory evidence that Tim Carlaw is the person who
appeared before me, and said person acknowledged that lie signed this instrument, on oath
stated that he was authorized to execute the instrument and acknowledged it as the
STORM DRAINAGE ENGINEER of THE CITY OF AUBURN to be the free and
voluntary act of such party for the uses and purposes mentioned in this instrument.
Dated ~A)
5 ~o Aar'<F''►,
O` ~0TAR;, 9c
n•
L
~'LIS!_.IV ' Z s
'Off' V4AFI\A,\ -
~Notary flubkc for the ~tate of Washington
Residing at Co Ac..-t t
My appointment expires
KM/tlb
File: #1054
REF. FI:Development\Forms\Legal Documents\2006
Storm Water Easement and Maintenance Agreement
Page 4 oi'26
EXHIBIT A
LEGAL DESCRIPTIONS:
ORIGINAL PARCEL A
Lots 1, 2 and 3 in Block 5 of Hart's First Addition to the Town of !Auburn,
according to plat recorded in Volume 20 of Plats at Page 23, records of King
County, Washington; Except the East 48 feet thereof.
PROPOSED PARCEL A
Lots 1, 2 and 3 in Block 5 of Hart's First Addition to the Town of Auburn,
according to ;plat recorded in Volume 20 of Plats: at Page 23, records of King
County, Washington;
EXCEPT the East 48 feet thereof;
AND EXCEPT that portion dedicated for right of way purposes lying
northwesterly of the following described line:
Beginning at a point on the wrest line of said Lots 1, 2 and 3 lying North
01°01'00" East 98.11 feet, more or less, from the southwest corner of said
Lot 3, said point being the beginning of a tangent curve concave to the
southeast having a radius of 20.00 feet; Thence northeasterly along said
curve through a central angle of 88°2.2'19" an arc distance of 30.85 feet.
more or less, to a point of tangency on the north line of said Lot 1, and the
terminus of said described line.
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Storm Water Easement and Maintenance Agreement
Page 5 of 26
PARCEL B LEGAL DESCRIPTION
The Easterly 48 feet of Lots 1, 2 and 3 in Block 5 of Hart's First Addition to the
Town of Auburn, according to plat recorded in Volume 20 of Plats at Page 23,
records of King County, Washington;
Together with the West Half of vacated alley lying Northerly of the Westerly
extension of the South line of Lot 26 in said Block 5, as attached thereto by
operation of law.
PARCEL D LEGAL DESCRIPTION
Lots 25 and 26 in Block 5 of Hart's First Addition to the Town of Auburn, according
to plat recorded in Volume 20 of Plats at Page 23, records of King County,
Washington;
Together with that portion of vacated alley adjoining, which upon vacation
attached to said property by operation of law.
Storm Water Easement and Maintenance Agreement
Page 6 of 26
EXHIBIT B
SIMMONS CONSTRUCTION, INC.
PROPOSED PARKING LOT
STORMWATER POLLUTION PREVENTION PLAN
102,106 & 114 11TH STREET SOUTHEAST
AUBURN, WASHINGTON
OWNER:
JOSEPH SIMMONS & SUSAN SIMMONS
C/O JOSEPH SIMMONS CONSTRUCTION, INC.
P.O. BOX 27089
SEATTLE, WASHINGTON 98165
(206) 362-7227
SITE TAX PARCELS NO. 314160-0430, -0431, -0565
PERMIT NO. FAC05.0013
PREPARED BY:
MARK C. SIEGENTHALER P.E., P.L.S.
561644 TH AVENUE SOUTHWEST
SEATTLE, WASHINGTON 98136
(206) 935-8323
Storm Water Lasement and Maintenance Agreement
Page 7 of 26
SIMMONS CONSTRUCTION, INC.
PROPOSED PARKING LOT
STORMWATER POLLUTION PREVENTION PLAN
102,106 & 114 11 T" STREET SOUTHEAST
AUBURN, WASHINGTON
Introduction
Simmons Construction, Inc., proposes to construct parking lots at 102 and 114
11th Street Southeast. The parking lots will provide a total of 21 stalls on new
asphalt pavement totaling 10,015 square feet.
The parking lots will drain into two retention systems, one on each lot. Each utilize
a bioretention swale and infiltration system to treat and retain stormwater.
Overflow from these systems will discharge over the site driveways into the Street
Street S.E. storm drainage system.
At each location, stormwater will drain from the paved areas over a 3:1
embankment into a bioretention swale. The bioretention Swale will consist of a
30-inch thick granular, organic compost which, by encouraging bacterial growth,
will treat runoff infiltrating pollutants. Underlying the compost layer is a sand filter
containing a perforated pipe gallery, which will store and disperse infiltrated water
into the native soil below. A catch basin connected to the sand filter piping serves
as both a conveyance point and an overflow.
Plan Goal
The primary components of the system are the bioretention swale, the underlying
sand layer, and the perforated piping system. The bioretention swale provides the
water treatment, and the sand layer and piping provide the runoff dispersal. The
goal of this Stormwater Pollution Prevention Plan (SWPPP) is to maintain the
function of these system components.
More specifically, the infiltrative capacity and porosity, and aerobic state of the
bioretention swale compost layer is to be maintained. The compost layer should
not become clogged with debris or thick vegetative mat, nor allowed to be
inundated for long periods of time. Short periods of inundation during rainstorm
events will not be detrimental.
Storm Water Easement and Maintenance Agreement
Page 8 of 26
The infiltration rate of the sand filter layer and the perforated piping should be
maintained. Silt and debris should not be allowed to get into the system through
the connecting catch basin, or otherwise. The catch basin sump should be
maintained so that sediment and debris does not enter into the perforated piping.
These components are to be monitored to insure that their functions are
maintained.
Prevention Best Management Practices (BMP's)
The following site management practices shall be implemented to prevent
pollution sources from accumulating:
1) Assign one or more individuals to be responsible for stormwater pollution
control. Familiarize the designee with the stormwater system plans and
SWPPP.
2) Promptly contain and clean up solid and liquied pollutant leaks and spills
including oils, solvents, fuels, and dust from exposed vegetation or paved
areas.
3) Regular sweeping of parking lot areas to prevent sediment and dust
accumulation.
4) Conduct all oily parts cleaning, steam cleaning, or pressure washing of
equipment or containers inside a building, and direct wastewater from such
operations to the sanitary sewer system.
5) Use drip pans to collect leaks and spills from industrial/commercial
equipment stored outside.
6) Store liquids in containers that are rigid and durable, corrosion resistant to
the weather and fluid content, non-absorbent, water tight, rodent-proof, and
equipped with a close fitting cover.
7) For the temporary storage of solid wastes contaminated with liquids or
other potential pollutant materials, use dumpsters, garbage cans, drums
and comparable containers which are durable, corrosion resistant, non-
absorbent, non-leaking, and equipped with either a solid cover or screen
cover to prevent littering. If covered with a screen, the container must be
stored under a lean-to or equivalent structure.
Storm Water Easement and Maintenance Agreement
Page 9 of 26
8) Where possible, store potential stormwater pollutant materials inside a
building or under a cover and/or containment.
9) Minimize use of toxic cleaning solvents such as chlorinated solvents, and
other toxic chemicals.
10) Recycle waste materials such as solvents, coolants, oils, degreasers, and
batteries to the maximum extent feasible.
11) The catch basins shall have stenciled on them "DUMP NO WASTE -
DRAINS TO STREAM." The owner shall be responsible for sweeping the
lot, installing storm drainage stenciling and provide spill control procedures.
In case of spill call DOE at 1-425-649-7000. The catch basins, bioretention
cell, and control structures will be visually inspected for accumulation of
debris and silt and will be maintained as required by this pollution
prevention plan and attachments.
• Maintenance Standards for Drainage Facilities (from the Department of
Ecology Storm Water Manual, August 2001)
No. 1 - Detention Ponds
No. 2 - Infiltration
No. 4 - Control Structure/Flow Restrictor
No. 5 - Catch Basins
No. 8 - Biofiltration Swale (do not encourage grass)
No. 14 - Sand Filters (below ground/enclosed)
No. 18 - Catch Basin Inserts
Treatment Best Management Practices BMP'S:
A bioretention cell has been installed to treat runoff for conventional
pollutants. The bioretention cell was designed to treat 64% of the 2-year
storm event (water quality storm) for water quality treatment. In addition,
the detention pond was designed to detain the volume created from
releasing half the existing 2-year, 10, 25, and 100-year storm events, while
holding the developed 2-year, 10, 25, and 100-year storm volumes.
The City of Auburn Storm Drainage Utility section is to review and approve
any changes to this Storm Water Pollution Prevention Plan prior to changes
in its implementation. Additionally, any changes in ownership or person of
responsibility are to be reported to the City of Auburn Storm Drainage Utility
section.
Storm Water E=asement and Maintenance Agreement
Page 10 of'26
Spill Response Plan
1) Immediately upon discovery, stop, contain, and clean up all spills.
2) If pollutant materials are stored on-site, have spill containment and cleanup
kits readily available. Keep labeled containers of absorbent materials on
site.
3) If the spill has reached or may reach a sanitary or a storm sewer,
groundwater, or surface water, notify the City of Auburn and the
Washington State Department of Ecology immediately. Notification must
comply with federal spill reporting requirements.
4) Do not flush absorbent materials or other spill cleanup materials to the
stormwater retention system or the city storm sewer system.
Inspection
1) Inspect the stormwater retention system twice per year, approximately
November 1 and May 1, or more.
2) Verify that pollutant sources identified in the SWPPP are accurate.
3) Inspect for verification and improvement of Prevention BMP's listed above.
4) Inspect the stormwater retention system for the following:
Catch basin: Measure sump sediment depth.
Catch basin: Connecting pipes are open, free of debris.
Catch basin grate: Free of vegetation encroachment and debris.
Sand filtration layer and piping: Inspect for groundwater elevation and
stormwater turbidity. If groundwater is encountered, verify that groundwater
surface falls at 15 minutes per inch or better. If turbid, search for source of
turbidity.
Sand filtration layer and piping: Measure and record groundwater elevation
and turbidity in sand filter system.
Storm Water Easement and Maintenance Agreement
Page 11 of 26
Bioretention swale compost layer: Inspect top 12 inches or greater depth
for signs of clogging, or mottling indicative of periodic high water table.
Bioretention swale compost layer: Inspect for presence of clogging
vegetative mat on compost layer.
General system: Verify that stormwater drainage is able to reach the
compost layer unimpeded.
5) Maintain visual inspection reports for a minimum of three years, including:
scope of the inspection, personnel conducting the inspection, date of
inspection, major observations relating to the implementation of the
SWPPP,and actions taken to correct BMP inadequacies. Record
observations of oil or hazardous substances or turbidity in the stormwater
retention system, or unknown sheen, film or discoloration. If significant or
persistent, collect samples for identification.
Maintenance
1) Routine maintenance shall be performed twice per year, or immediately
upon completion of inspections noted above.
2) Clean out catch basin debris accumulations when depth exceeds 6 inches.
3) Remove sediment, vegetation, and debris accumulations impeding or
clogging stormwater conveyance.
4) Sweep pavement areas free from dust and sediment accumulation.
5) Remove and replenish granular compost material when clogged,
contaminated, vegetation-matted, or deficient in quantity, with equivalent
conforming to the specifications given in the design plans.
6) Minor clogging of the sand filter layer or perforated piping may be reduced
by back flushing.
7) Refer to the attached Maintenance Standards, relevant portions of which
are hereby incorporated into this SWPPP.
Storm Water Easement and Maintenance Agreement
Page 12 of 26
Responsible Person:
Mr. Joseph Simmons
Simmons Construction, Inc.
3223 N.E. 125t' Street
Seattle, Washington 98165
(206) 362-7227
Emergency phone number: 206-427-3050
Design Engineer:
Mark Siegenthaler, P.E., P.L.S.
5616 44th Avenue S.W.
Seattle, WA 98136
(206) 935-8323
Plan and/or Information Updates:
The City of Auburn Storm Drainage Utility section is to review and approve
any changes to this Storm Water Pollution Prevention Plan prior to changes
in its implementation. Additionally, any changes in ownership or person of
responsibility are to be reported to the City Storm Drainage Utility section.
Storm Water Easement and Maintenance Agreement
Page 13 of 26
INSPECTION/MAINTENANCE CHECKLIST
STRUCTURE
DATE OF INSPECTION/MAINTENANCE
Results/
Maintenance
Date
Inspection
All Catch Basins
Results
Maintenance
Done
Bioretention Cell
Inspection
Results
Maintenance
Done
Conveyance and
Inspection
Transmission Pipes
Results
Maintenance
Done
Infiltration Cell
Inspection
Results
Maintenance
Done
Flow Distribution
Inspection
Structure
Results
Maintenance
Done
Storm Water Easement and Maintenance Agreement
Page 14 of 26
DOE Storm Water Management Manual for Western Washington,
(August 2001)
Maintenance Standards for Drainage Facilities:
The facility-specific maintenance standards contained in this section are
intended to be conditions for determining if maintenance actions are
required as identified through inspection. They are not intended to be
measures of the facility's required condition at all times between
inspections. In other words, exceeding these conditions at any time
between inspections and/or maintenance does not automatically constitute
a violation of these standards. However, based upon inspection
observations, the inspection and maintenance schedules shall be adjusted
to minimize the length of time that a facility is in a condition that requires a
maintenance action.
Storm Water Easement and Maintenance Agreement
Page 15 of 26
No. 1 - Detention Ponds
Maintenance
Defect
Conditions When Maintenance Is
Results Expected When
Component
Needed
Maintenance Is Performed
General
Trash & Debris
Any trash and debris which exceed 5
Trash and debris cleared from site.
cubic feet per 1,000 square feet (this
is about equal to the amount of trash
it would take to fill up one standard
size garbage can). In general, there
should be no visual evidence of
dumping.
If less than threshold all trash and
debris will be removed as part of next
scheduled maintenance.
Poisonous
Any poisonous or nuisance
No danger of poisonous vegetation
Vegetation and
vegetation which may constitute a
where maintenance personnel or the
noxious weeds
hazard to maintenance personnel or
public might normally be. (Coordinate
the public.
with local health department.)
Any evidence of noxious weeds as
Complete eradication of noxious weeds
defined by State or local regulations.
may not be possible. Compliance with
State or local eradication policies
(Apply requirements of adopted IPM
required.
policies for the use of herbicides).
Contaminants
Any evidence of oil, gasoline,
No contaminants or pollutants present.
and Pollution
contaminants or other pollutants.
(Coordinate removal/cleanup with
local water quality response agency).
Rodent Holes
Any evidence of rodent holes if
Rodents destroyed and dam or berm
facility is acting as a dam or berm, or
repaired. (Coordinate with local health
any evidence of water piping through
department; coordinate with Ecology
dam or berm via rodent holes.
Dam Safety Office if pond exceeds 10
acre-feet.)
Storm Water Easement and Maintenance Agreement
Page 16 of 26
No. 1 - Detention Ponds
Maintenance
Defect
Conditions When Maintenance Is
Results Expected When
Component
Needed
Maintenance Is Performed
Beaver Dams
Dam results in change or function of
Facility is returned to design function.
the facility.
(Coordinate trapping of beavers and
removal of dams with appropriate
permitting agencies.)
Insects
When insects such as wasps and
Insects destroyed or removed from
hornets interfere with maintenance
site.
activities.
Apply insecticides in compliance with
adopted IPM policies.
Tree Growth
Tree growth does not allow
Trees do not hinder maintenance
and Hazard
maintenance access or interferes
activities. Harvested trees should be
Trees
with maintenance activity (i.e., slope
recycled into mulch or other beneficial
mowing, silt removal, vactoring, or
uses (e.g., alders for firewood).
equipment movements). If trees are
not interfering with access or
Remove hazard trees.
maintenance, do not remove.
If dead, diseased, or dying trees are
identified.
(Use a certified Arborist to determine
health of tree or removal
requirements.)
Side Slopes
Erosion
Eroded damage over 2 inches deep
Slopes should be stabilized using
of Pond
where cause of damage is still
appropriate erosion control measure(s);
present or where there is potential for
6F.g., rock reinforcement, planting of
continued erosion.
grass, compaction.
Any erosion observed on a
If erosion is occurring on compacted
compacted berm embankment.
berms a licensed civil engineer should
be consulted to resolve source of
erosion.
Storage Area
Sediment
Accumulated sediment that exceeds
Sediment cleaned out to designed
10% of the designed pond depth
pond shape and depth; pond reseeded
unless otherwise specified or affects
if necessary to control erosion.
inletting or outletting condition of the
facility.
Liner (If
Liner is visible and has more than
Liner repaired or replaced. Liner is
Applicable)
three 1/4-inch holes in it.
fully covered.
Storm Water Easement and Maintenance Agreement
Page 17 of 26
No. 1- Detention Ponds
Maintenance
Defect
Conditions When Maintenance Is
Results Expected When
Component
Needed
Maintenance Is Performed
Pond Berms
Settlements
Any part of berm that has settled 4
Dike is built back to the design
(Dikes)
inches lower than the design
elevation.
elevation.
If settlement is apparent, measure
berm to determine amount of
settlement.
Settling can be an indication of more
severe problems with the berm or
outlet works. A licensed civil
engineer should be consulted to
determine the source of the
settlement.
Piping
Discernable water flow through pond
Piping eliminated. Erosion potential
berm. Ongoing erosion with potential
resolved.
for erosion to continue.
(Recommend a Goethechnical
engineer be called in to inspect and
evaluate condition and recommend
repair of condition.
Emergency
Tree Growth
Tree growth on emergency spillways
Trees should be removed. If root
Overflow/
creates blockage problems and may
system is small (base less than 4
Spillway and
cause failure of the berm due to
inches) the root system may be left in
Berms over 4
uncontrolled overtopping.
place. Otherwise the roots should be
feet in height.
removed and the berm restored. A
Tree growth on berms over 4 feet in
licensed civil engineer should be
height may lead to piping through the
consulted for proper berm/spillway
berm which could lead to failure of
restoration.
the berm.
Piping
Discernable water flow through pond
Piping eliminated. Erosion potential
berm. Ongoing erosion with
resolved.
potential for erosion to continue.
(Recommend a Goethechnical
engineer be called in to inspect and
evaluate condition and recommend
repair of condition.
Emergency
Emergency
Only one layer of rock exists above
Rocks and pad depth are restored to
Overflow/
Overflow/
native soil in area five square feet or
design standards.
Spillway
Spillway
larger, or any exposure of native soil
at the top of out flow path of spillway.
(Riprap on inside slopes need not be
replaced.)
Erosion
See "Side Slopes of Pond."
Storm Water Easement and Maintenance Agreement
Page 18 of 26
No. 2 - Infiltration
Maintenance
Defect
Conditions When Maintenance Is
Results Expected
Component
Needed
When Maintenance Is
Performed
General
Trash & Debris
See "Detention Ponds" (No. 1).
See "Detention Ponds"
(No. 1).
Poisonous/Noxious
See "Detention Ponds" (No. 1).
See "Detention Ponds"
Vegetation
(No. 1).
Contaminants and
See "Detention Ponds" (No. 1).
See "Detention Ponds"
Pollution
(No. 1).
Rodent Holes
See "Detention Ponds" (No. 1).
See "Detention Ponds"
(No. 1).
Storage Area
Sediment
Water ponding in infiltration pond after
Sediment is removed
rainfall ceases and appropriate time
and/or facility is cleaned
allowed for infiltration.
so that infiltration system
works according to
A percolation test it or test of facilit
( p y
design.
indicates facility is only working at 90% of
its designed capabilities. If two inches or
more sediment is present, remove).
Filter Bags (if
Filled with Sediment
Sediment and debris fill bag more than 1/2
Filter bag is replaced or
applicable)
and Debris
full.
system is redesigned.
Rock Filters
Sediment and
By visual inspection, little or no water flows
Gravel in rock filter is
Debris
through filter during heavy rainstorms.
replaced.
Side Slopes of
Erosion
See "Detention Ponds" (No. 1).
See "Detention Ponds"
Pond
(No. 1).
Emergency
Tree Growth
See "Detention Ponds" (No. 1).
See "Detention Ponds"
Overflow Spillway
(No. 1).
and Berms over 4
feet in height.
Piping
See "Detention Ponds" (No. 1).
See "Detention Ponds"
(No. 1).
Emergency
Rock Missing
See "Detention Ponds" (No. 1).
See "Detention Ponds"
Overflow Spillway
(No. 1).
Erosion
See "Detention Ponds" (No. 1).
See "Detention Ponds"
(No. 1).
Pre-settling
Facility or sump
6" or designed sediment trap depth of
Sediment is removed.
Ponds and Vaults
filled with Sediment
sediment.
and/or debris
Storm Water Easement and Maintenance Agreement
Page 19 of 26
No. 4- Control Structure/Flow Restrictor
Maintenance
Defect
Condition When Maintenance is Needed
Results Expected
Component
When Maintenance
is Performed
General
Trash and Debris
Material exceeds 25% of sump depth or 1
Control structure
(Includes Sediment)
foot below orifice plate.
orifice is not blocked.
All trash and debris
removed.
Structural Damage
Structure is not securely attached to
Structure securely
manhole wall.
attached to wall and
outlet pipe.
Structure is not in upright position (allow up
Structure in correct
to 10% from plumb).
position.
Connections to outlet pipe are not watertight
Connections to outlet
and show signs of rust.
pipe are watertight;
structure repaired or
replaced and works
as designed.
Any holes, other than designed holes, in the
Structure has no
structure.
holes other than
designed holes.
Cleanout Gate
Damaged or Missing
Cleanout gate is not watertight or is missing.
Gate is watertight
and works as
designed.
One maintenance person cannot move up
Gate moves up and
and down gate.
down easily and is
watertight.
Chainlrod leading to gate is missing or
Chain is in place and
damaged.
works as designed.
Gate is rusted over 50% of its surface area.
Gate is repaired or
replaced to meet
design standards.
Orifice Plate
Damaged or Missing
Control device is not working properly due
Plate is in place and
to missing, out of place, or bent orifice plate.
works as designed.
Obstructions
Any trash, debris, sediment, or vegetation
Plate is free of all
blocking the plate.
obstructions and
works as designed.
Overflow Pipe
Obstructions
Any trash or debris blocking (or having the
Pipe is free of all
potential of blocking) the overflow pipe.
obstructions and
works as designed.
Manhole
See "Closed
See "Closed Detention Systems" (No. 3).
See "Closed
Detention Systems"
Detention Systems"
(No. 3).
(No. 3).
Catch Basin
See "Catch Basins"
See "Catch Basins" (No. 5).
See "Catch Basins"
(No. 5).
(No. 5).
Storm Water Easement and Maintenance Agreement
Page 20 of 26
No. 5 - Catch Basins
Maintenance
Defect
Conditions When Maintenance is Needed
Results Expected When
Component
Maintenance is
performed
General
Trash &
Trash or debris which is located immediately
No Trash or debris
Debris
in front of the catch basin opening or is
located immediately in
blocking inletting capacity of the basin by
front of catch basin or on
more than 10%.
grate opening.
Trash or debris (in the basin) that exceeds 60
No trash or debris in the
percent of the sump depth as measured from
catch basin.
the bottom of basin to invert of the lowest
pipe into or out of the basin, but in no case
less than a minimum of six inches clearance
from the debris surface to the invert of the
lowest pipe.
Trash or debris in any inlet or outlet pipe
Inlet and outlet pipes free
blocking more than 1/3 of its height.
of trash or debris.
Dead animals or vegetation that could
No dead animals or
generate odors that could cause complaints
vegetation present within
or dangerous gases (e.g., methane).
the catch basin.
Sediment
Sediment (in the basin) that exceeds 60
No sediment in the catch
percent of the sump depth as measured from
basin.
the bottom of basin to invert of the lowest
pipe into or out of the basin, but in no case
less than a minimum of 6 inches clearance
from the sediment surface to the invert of the
lowest pipe.
Structure
Top slab has holes larger than 2 square
Top slab is free of holes
Damage to
inches or cracks wider than 1/4 inch.
and cracks.
Frame and/or
Top Slab
(Intent is to make sure no material is running
into basin).
Frame not sitting flush on top slab, i.e.,
Frame is sitting flush on
separations of more than 3/4 inch of the
the riser rings or top slab
frame from the top slab. Frame not securely
and firmly attached.
attached
Fractures or
Maintenance person judges that structure is
Basin replaced or
Cracks in
unsound.
repaired to design
Basin Walls/
standards.
Bottom
Grout fillet has separated or cracked wider
Pipe is regrouted and
than 1/2 inch and longer than 1 foot at the
secure at basin wall.
joint of any inlet/outlet pipe or any evidence
of soil particles entering catch basin through
cracks.
Settlement/
If failure of basin has created a safety,
Basin replaced or
Misalignment
function, or design problem.
repaired to design
standards.
Vegetation
Vegetation growing across and blocking
No vegetation blocking
more than 10% of the basin opening.
opening to basin.
Storni Water Easement and Maintenance Agreement
Page 21 of 26
No. 5 - Catch Basins
Maintenance
Defect
Conditions When Maintenance is Needed
Results Expected When
Component
Maintenance is
performed
Vegetation grouting in inlet/outlet pipe joints
No vegetation or root
that is more than six inches tall and less than
growth present.
six inches apart.
Contamination
See "Detention Ponds" (No. 1).
No pollution present.
and Pollution
Catch Basin
Cover Not in
Cover is missing or only partially in place.
Catch basin cover is
Cover
Place
Any open catch basin requires maintenance.
closed.
Locking
Mechanism cannot be opened by one
Mechanism opens with
Mechanism
maintenance person with proper tools. Bolts
proper tools.
Not Working
into frame have less than 1/2 inch of thread.
Cover Difficult
One maintenance person cannot remove lid
One maintenance person
to Remove
after applying normal lifting pressure.
can remove cover.
(Intent is keep cover from sealing off access
to maintenance.)
Ladder
Ladder Rungs
Ladder is unsafe due to missing rungs, not
Ladder meets design
Unsafe
securely attached to basin wall,
standards and allows
misalignment, rust, cracks, or sharp edges.
maintenance person safe
access.
Metal Grates
Grate opening
Grate with opening wider than 7/8 inch.
Grate opening meets
(If Applicable)
Unsafe
design standards.
Trash and
Trash and debris that is blocking more than
Grate free of trash and
Debris
20% of grate surface inletting capacity.
debris.
Damaged or
Grate missing or broken member(s) of the
Grate is in place and
Missing.
grate.
meets design standards.
Storm Water Easement and Maintenance Agreement
Page 22 of 26
No. 8 - Typical Biofiltration Swale
Maintenance
Defect or
Condition When
Recommended Maintenance to Correct
Component
Problem
Maintenance is Needed
Problem
General
Sediment
Sediment depth exceeds 2
Remove sediment deposits on grass
Accumulation on
inches.
treatment area of the bio-swale. When
Grass
finished, swale should be level from side
to side and drain freely toward outlet.
There should be no areas of standing
water once inflow has ceased.
Standing Water
When water stands in the
Any of the following may apply: remove
swale between storms and
sediment or trash blockages, improve
does not drain freely,
grade from head to foot of swale, remove
clogged check dams, add underdrains or
convert to a wet biofiltration swale.
Flow spreader
Flow spreaders uneven or
Level the spreader and clean so that
clogged so that flows are not
flows are spread evenly over entire swale
uniformly distributed through
width.
entire swale width.
Constant
When small quantities of
Add a low-flow pea-gravel drain the length
Baseflow
water continually flow through
of the swale or by-pass the base flow
the swale, even when it has
around the swale.
been dry for weeks, and an
eroded, muddy channel has
formed in the swale bottom.
Poor Vegetation
When grass is sparse or bare
Determine why grass growth is poor and
Coverage
or eroded patches occur in
correct that condition. Re-plant with plugs
more than 10% of the swale
of grass from the upper slope: plant in the
bottom.
swale bottom at 8-inch intervals. Or re-
seed into loosened, fertile soil.
Vegetation
When the grass becomes
Mow vegetation or remove nuisance
excessively tall (greater than
vegetation so that flow not impeded.
10-inches); when nuisance
Grass should be mowed to a height of 3
weeds and other vegetation
to 4 inches. Remove grass clippings.
start to take over.
Excessive
Grass growth is poor
If possible, trim back over-hanging limbs
Shading
because sunlight does not
and remove brushy vegetation on
reach swale.
adjacent slopes.
Inlet/Outlet
Inlet/outlet areas clogged
Remove material so that there is no
with sediment and/or debris.
clogging or blockage in the inlet and
outlet area.
Trash and
Trash and debris
Remove trash and debris from bioswale.
Debris
accumulated in the bio-swale.
Accumulation
Storm Water Easement and Maintenance Agreement.
Page 23 of 26
No. 8 - Typical Biofiltration Swale
Maintenance
Component
Defect or
Problem
Condition When
Maintenance is Needed
Recommended Maintenance to Correct
Problem
Erosion/Scouring
Eroded or scoured swale
For ruts or bare areas less than 12 inches
bottom due to flow
wide, repair the damaged area by filling
channelization, or higher
with crushed gravel. If bare areas are
flows.
large, generally greater than 12 inches
wide, the swale should be re-graded and
re-seeded. For smaller bare areas,
overseed when bare spots are evident, or
take plugs of grass from the upper slope
and plant in the swale bottom at 8-inch
intervals.
Storm Water Easement and Maintenance Agreement
Page 24 of 26
No. 14 -Sand Filters (below ground/enclosed)
Maintenance
Defect
Condition When Maintenance is
Results Expected When
Component
Needed
Maintenance is Performed
Below Ground
Sediment
Sediment depth exceeds 112-inch.
No sediment deposits on sand
Vault.
Accumulation on
filter section that which would
Sand Media
impede permeability of the filter
Section
section.
Sediment
Sediment accumulation in vault
No sediment deposits in first
Accumulation in
bottom exceeds the depth of the
chamber of vault.
Pre-Settling
sediment zone plus 6-inches.
Portion of Vault
Trash/Debris
Trash and debris accumulated in
Trash and debris removed from
Accumulation
vault, or pipe inlet/outlet, floatables
vault and inlet/outlet piping.
and non-floatables.
Sediment in
When drain pipes, cleanouts become
Sediment and debris removed.
Drain
full with sediment and/or debris.
Pipes/Cleanouts
Short Circuiting
When seepagelflow occurs along the
Sand filter media section re-laid
vault walls and comers. Sand
and compacted along perimeter
eroding near inflow area.
of vault to form a semi-seal.
Erosion protection added to
dissipate force of incoming flow
and curtail erosion.
Damaged Pipes
Inlet or outlet piping damaged or
Pipe repaired and/or replaced.
broken and in need of repair.
Access Cover
Cover cannot be opened.
Cover repaired to proper working
Damaged/Not
corrosionideformation of cover.
specifications or replaced.
Working
Maintenance person cannot remove
cover using normal lifting pressure.
Ventilation
Ventilation area blocked or plugged.
Blocking material removed or
cleared from ventilation area. A
specified % of the vault surface
area must provide ventilation to
the vault interior (see design
specifications).
Vault Structure
Cracks wider than 1/2-inch or
Vault replaced or repairs made
Damaged;
evidence of soil particles entering the
so that vault meets design
Includes Cracks
structure through the cracks, or
specifications and is structurally
in Walls, Bottom,
maintenance/inspection personnel
sound.
Damage to
determine that the vault is not
Frame and/or
structurally sound.
Top Slab.
Cracks wider than 1/2-inch at the
Vault repaired so that no cracks
joint of any inlet/outlet pipe or
exist wider than 1/4-inch at the
evidence of soil particles entering
joint of the inlet/outlet pipe.
through the cracks.
Storm Water Easement and Maintenance Agreement
Page 25 of'26
No. 14-Sand Filters (below ground/enclosed)
Maintenance
Defect
Condition When Maintenance is
Results Expected When
Component
Needed
Maintenance is Performed
Below Ground
Sediment
Sediment depth exceeds 1/2-inch.
No sediment deposits on sand
Vault.
Accumulation on
filter section that which would
Sand Media
impede permeability of the filter
Section
section,
Sediment
Sediment accumulation in vault
No sediment deposits in first
Accumulation in
bottom exceeds the depth of the
chamber of vault.
Pre-Settling
sediment zone plus 6-inches.
Portion of Vault
Trash/Debris
Trash and debris accumulated in
Trash and debris removed from
Accumulation
vault, or pipe inletloutlet, floatables
vault and inlet/outlet piping.
and non-floatables.
Sediment in
When drain pipes, cleanouts become
Sediment and debris removed.
Drain
full with sediment and/or debris.
Pipes/Cleanouts
Short Circuiting
When seepage/flow occurs along the
Sand filter media section re-laid
vaultwalls and corners. Sand
and compacted along perimeter
eroding near inflow area.
of vault to form a semi-seal.
Erosion protection added to
dissipate force of incoming flow
and curtail erosion.
Damaged Pipes
Inlet or outlet piping damaged or
Pipe repaired and/or replaced.
broken and in need of repair.
Access Cover
Cover cannot be opened,
Cover repaired to proper working
Damaged/Not
corrosion/deformation of cover.
specifications or replaced.
Working
Maintenance person cannot remove
cover using normal lifting pressure.
Ventilation
Ventilation area blocked or plugged.
Blocking material removed or
cleared from ventilation area. A
specified % of the vault surface
area must provide ventilation to
the vault interior (see design
specifications).
Vault Structure
Cracks wider than 1/2-inch or
Vault replaced or repairs made
Damaged;
evidence of soil particles entering the
so that vault meets design
Includes Cracks
structure through the cracks, or
specifications and is structurally
in Walls, Bottom,
maintenancelinspection personnel
sound.
Damage to
determine that the vault is not
Frame and/or
structurally sound.
Top Slab.
Cracks wider than 1/2-inch at the
Vault repaired so that no cracks
joint of any inlet/outlet pipe or
exist wider than 1/4-inch at the
evidence of soil particles entering
joint of the inlet/outlet pipe.
through the cracks.
Storm Water Easement and Maintenance Agreement
Page 25 of 26
No. 14-Sand Filters (below ground/enclosed)
Maintenance
Component
Defect
Condition When Maintenance is
Needed
Results Expected When
Maintenance is Performed
Baffles/Internal
Baffles or walls corroding, cracking,
Baffles repaired or replaced to
walls
warping and/or showing signs of
specifications.
failure as determined by
maintenance/inspection person.
Access Ladder
Ladder is corroded or deteriorated,
Ladder replaced or repaired to
Damaged
not functioning properly, not securely
specifications, and is safe to use
attached to structure wall, missing
as determined by inspection
rungs, cracks, and misaligned.
personnel.
No. 18 -Catch Basin Inserts
Maintenance
Defect
Conditions When Maintenance
Results Expected When
Component
is Needed
Maintenance is Performed
General
Sediment
When sediment forms a cap
No sediment cap on the insert
Accumulation
over the insert media of the
media and its unit.
insert and/or unit.
Trash and Debris
Trash and debris accumulates
Trash and debris removed from
Accumulation
on insert unit creating a
insert unit. Runoff freely flows
blockage/restriction.
into catch basin.
Media Insert Not
Effluent water from media insert
Effluent water from media insert
Removing Oil
has a visible sheen.
is free of oils and has no visible
sheen.
Media Insert Water
Catch basin insert is saturated
Remove and replace media
Saturated
with water and no longer has the
insert.
capacity to absorb.
Media Insert-Oil
Media oil saturated due to
Remove and replace media
Saturated
petroleum spill that drains into
insert.
catch basin.
Media Insert Use
Media has been used beyond
Remove and replace media at
Beyond Normal
the typical average life of media
regular intervals, depending on
Product Life
insert product.
insert product.
7
Storm Water Easement and Maintenance Agreement
Page 26 of 26