HomeMy WebLinkAbout20031110001393 STORM EASEMENT 111003/?-3. 13. Z.
Return Address:
City of Auburn
City Clerk
25 West Main
Auburn, WA 98001
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STORM WATER EASEMENT AND MAINTENANCE AGREEMENT
FAC02-0026
Reference # (if applicable): N/A
Grantor/Borrower: United States Gypsum Company
Grantee/Assignee/Beneficiary:
Legal Description/STR:
Assessor's Tax Parcel ID#:
City of Auburn
NEI/a, 13-21N-04E
132104-9088,132104-9111
t-- 13~ PNu r
Lj to '2..-H - 12.._-
THIS EASEMENT AND AGREEMENT made and entered into this
day of October , 2003, by and between the City of Auburn, a municipal
corporation of King County, Washington, hereinafter referred to as "CITY, and United
States Gypsum Company, hereinafter referred to as "PROPERTY OWNER".
WHEREAS, PROPERTY OWNER has applied foricgrtainrpdrnvt Qrw~ with the CITY
for the construction of facilities at USG Expansion 1dG tEdtatp4011 ,ott5,q&-e NeWaCwhich
create impervious surface; and modation only. It has not beep,
examined as to proper execution or
as to Its affectu
WHEREAS, the PROPERTY OWNER will complete a sto ygVem; and
WHEREAS, the PROPERTY OWNER and the CITY desire that the storm system
be maintained to provide adequate facilities for controlling both the quantity end 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
II~~IIIIINIMIN~N~
2
0031110001393
PACIFIC NW TIT RAS 35.00
PAGE981 OF 017
11/19/2003 15:47
KING COUNTY, WA
Storm Water Easement and Maintenance Agreement
Page 1 of 17
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
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 an easement over, under 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. FAC02-0026, 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 of benefit to the City storm 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
he/she/they/it shall reimburse the CITY for the costs incurred by the CITY in maintaining.
Storm Water Easement and Maintenance Agreement
Page 2 of 17
the storm system. Should the CITY incur attorney's fees and/or costs in enforcing the
agreement and/or in 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.
CITY OF AUBURN
CITY ENGINEER
ATTEST:
PROPERTY OWNER:
United States Gypsum Company
By: ti.tr- A -6- vZ~u. sy : i6t,-R l of ° / 0/9/03
Su ne K. Torrey Date
Secretary Karen L. Leets
Vice President & Assistant Treasurer
CP/bi
File: #897
REF. H:Developmenfforms\Legal Documents12003
Storm Water Easement and Maintenance Agreement
Page 3 of 17
STATE OF WASHINGTON)
)ss.
County of King )
I certify that I know or have satisfactory evidence that Dennis Selle is the person who
appeared before me, and said person acknowledged that he signed this instrument, on oath
stated that he was authorized to execute the instrument and acknowledged it as the CITY
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 %d Z Aqa
SSA SA
~lSLIC Notary Public in and for the State o Washington
Ott , T + o~ . residing ati " e ~o uti {
tltr~c~` N`~~j~~ My appointmen expires r 1a
STATE OF ILLINOIS'-
)ss.
County of Cook )
I certify that I know or have satisfactory evidence that Karen L. Leets
and Su7nnap x Tnrrpy are the persons who appeared before me, and
said persons acknowledged that they signed this instrument, on oath stated that they were
authorized to execute the instrument and acknowledged it as the Vice President and Assistant
Tr n>r w and Cprrotar respectively of United States Gypsum
CnmVwnV_- _ a corporation, to be the free and voluntary act of such parties for
the uses and purposes mentioned in this instrument.
Dated nr_taher R , 2003
SEAT."
P-'OFFICLAL
JOHN W. FALVEY (9
I i _
Notary Public, State o` Illinois 4~ V r1 n Vv ~-V C
My Commission Expires 11123'05 Notary Public in and for the State of Illinois
residing at 125 South Franklin St_ Chicago. Illinois 60606
My appointment expires j I _ 2 3 69,S--
Storm Water Easement and Maintenance Agreement
Page 4 of 17
EXHIBIT "A"
THAT PORTION OF THE NORTH HALF OT THE NORTHEAST QUARTER OF
SECTION 13, TOWNSHIP 21 NORTH, RANGE 4 EAST, W.M., IN KING COUNTY,
WASHINGTON, BEING MORE PARTICULARLY DESCRIBED AS FOLLOWS:
BEGINNING AT THE SOUTHWEST CORNER OF LOT 2 CITY OF AUBURN SHORT
PLAT NUMBER 0009-97, AS RECORDED UNDER RECORDING NUMBER
9712041392, IN KING
COUNTY, WASHINGTON;
THENCE NORTH 1° 27'58" EAST FOR 115.86 FEET;
THENCE SOUTH 88° 32'02" EAST FOR 171.70 FEET;
THENCE NORTH 1° 34' 11" EAST FOR 388.32 FEET TO THE BEGINNING OF A
NON-TANGENT CURVE TO THE LEFT THE CENTER OF WHICH BEARS NORTH
24°54'12" EAST;
THENCE ALONG SAID CURVE HAVING A RADIUS OF 468.35 FEET, THROUGH A
CENTRAL ANGLE OF 14°52'28" AN ARC DISTANCE OF 121.59 FEET;
THENCE SOUTH 1° 27'58" WEST FOR 2.70 FEET TO THE SOUTH LINE OF THE
NORTH 180 FEET OF THE SOUTH HALF OF THE NORTH HALF OF SAID
NORTHEAST QUARTER;
THENCE ALONG SAID SOUTH LINE, SOUTH 86° 07' 42" EAST FOR 514.38 FEET
TO THE NORTHEAST CORNER OF LOT 3, CITY OF AUBURN SHORT PLAT
NUMBER 0006-92, AS RECORDED UNDER RECORDING NUMBER 9301141836;
THENCE SOUTH 3° 52' 16" WEST FOR 450.18 FEET TO THE SOUTHWEST
CORNER OF LOT 4 OF SAID AUBURN SHORT PLAT NUMBER 0006-92;
THENCE ALONG THE SOUTH LINE OF SAID LOT 4, SOUTH 86° 05'56" EAST FOR
498.94 FEET TO THE WESTERLY RIGHT OF WAY MARGIN OF "C" STREET
NORTHWEST TO THE BEGINNING OF A NON-TANGENT CURVE TO THE LEFT
THE CENTER OF WHICH BEARS SOUTH 81°03'25" EAST;
THENCE SOUTHERLY ALONG SAID CURVE HAVING A RADIUS OF 230 FEET,
THROUGH A CENTRAL ANGLE OF 7°28'43" AN ARC DISTANCE OF 30.03 FEET
TO THE SOUTH LINE OF THE NORTH HALF OF SAID NORTHEAST QUARTER;
THENCE ALONG SAID SOUTH LINE, NORTH 86° 05'56" WEST FOR 1281.68 FEET,
TO THE POINT OF BEGINNING.
Storm Water Easement and Maintenance Agreement
Page 5of17
EXHIBIT "B"
STORM WATER POLLUTION PREVENTION PLAN
for
USG EXPANSION
SEPA # SEP 02-0020
FAC # GRA 02-0011
Site Address:
The project is located in Section 13, Township 21 North, Range 4 East, W.M. at 401 C
Street NW. The Tax Parcel # 132104-9088, 9111
Introduction:
This storm drainage technical information report has been prepared to address the City of
Auburn site development and storm drainage requirements for the proposed USG Building
expansion. The site is located at 401 "C" Street NW and consists of 3.27 acres in size.
The proposed project is going to be an extension of an existing building that will combine
this proposed project (3.27 acres) with the adjacent existing development to the east (3.89
acres) into one complete project (7.16 acres). The existing building to the east already has
an existing storm drainage system, but no storm water quality control. We are proposing
to "redevelop" the entire storm water system for both sites and use one detention / wet
pond for the entire project.
The parcel is undeveloped and slopes from the center of the site in all directions at an
average gradient of 1.0% The undeveloped portion of the site consists of native
grasses, exposed soils and gravel. The storm water runoff from the site is absorbed into
the existing soils or ponds on-site. There is no evidence of any concentrated on-site flows
going off-site. The existing developed portion of the site has an existing storm
conveyance system that collects all of the storm water runoff and conveys it to a pump lift
station located' at the southwest portion of the existing lot. Here the storm water is
pumped to the northwest in a 3" line (force main) to an unknown outlet point. There is no
current storm water quantity or quality control for the existing development. There is an
existing public storm "trunk" line located in `H' Street NW. This line conveys water to
the north.
According to the City of Auburn's Construction Standards for storm water management,
the city requires storm water quantity and quality control to all proposed developments.
We have proposed to collect all of the storm water runoff from the landscaped, building
and pavement areas in a series of catch basins. This water is conveyed via storm drainage
pipes, and force mains, to a storm water detention/wet pond located in the southwest
corner of the site. Here the storm water will be released into the existing 18" storm
drainage line located in "H" Street NW.
Storm Water Easement and Maintenance Agreement
Page 6 of 17
For the subject site we have proposed a combination detention/wet pond. The storm water
will be detained in an open pond constructed of concrete walls on three sides from the
outlet elevation up to one foot above the 10{) year design storm elevation. This area will
be considered "live storage" and has been designed to hold the following inflow/outflow
rates by a multiple orifice control structure.
1/2 ex. 2yr-24hr during the developed 2yr-24hr storm event.
Ex. 10 year during the developed 10 year-24 hour storm event.
Ex. 25 year during the developed 25 year-24 hour storm event.
Ex. 100 year during the developed 100 year-24 hour storm event.
The detention storage volume will not provide a factor of safety per the City of Auburn's
design criteria for detention with overflow. However, the system has been designed to
release storm water out of a catch basin located in the drive entrance adjacent to "H"
Street NW at the 100 year design storm elevation in case of flooding or plugging of the
outlet pipe. An emergency overflow spillway has also been installed in the pond to allow
water to overflow into `H' Street NW.
The area below the outlet elevation will be considered "dead storage" and will consist of a
three foot deep triangular shaped channel with 3:1 horizontal to vertical side slopes. The
storm water conveyance into the pond is located at the furthest point from the outlet to
provide maximum hydraulic residence time. A gravel filter window will be installed to
assist with the water quality process of the proposed wet pond.
Plan Goal
The specific purpose for the storm water facility is to minimize pollution that is typically
associated with modern development. In general, pollution from motor vehicles and
pollution generated from erosion. Attached to this narrative is a maintenance manual
which offers guidelines to the owner for storm water facility maintenance.
Prevention BN11P'S
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 1-425-649-7000. The
catch basins, detention / wet pond, 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
No. 1 - Detention Pond
No. 4 - Control Structure/Flow Restrictor
No. 5 - Catch Basins
No. 11 - Wet Pond
(Department of Ecology Storm Water Manual, August 2001).
Storm Water Easement and Maintenance Agreement
Page 7 of 17
Treatment BMP'S
A two celled detention / wet pond has been installed to treat runoff for conventional
pollutants. The wet pond 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 Utilities 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 Utilities
Sections.
Inspection / Maintenance:
Regular inspections of the drainage facilities should be carried out twice per year, in the
spring and fall. The responsible party should keep records of these inspections available
for review by the City. Additional inspections may be required after severe seasonal
storms.
Routine maintenance of the site will include mowing, care of landscaping and the removal
of trash and debris from the drainage system. The parking lots and driveways should be
kept clean and in repair. Events such as major storms or heavy winds will require
immediate inspections for damages.
To ensure proper water quality and treatment, the detention / wet pond must be properly
maintained. Be careful to avoid introducing landscape fertilizer to receiving waters or
groundwater. If wet pond side slopes become eroded over 2 inches deep, stabilize by
using appropriate erosion control measures (e.g., rock reinforcement, planting of grass,
compaction).
Catch Basins shall be cleaned when sump is 1/3' full of sediment or debris.
Person of Responsibility:
US Gypsum Corp.
Attn: Mr. Brett Klingenberg
401 C Street NW
Auburn, WA 98001
Design Engineer:
Poe Engineering, Inc
1314 8`s Street NE #102
Auburn, WA 98002
253 833-4052
Storm Water Easement and Maintenance Agreement
Page 8 of 17
Plan and / or Information Updates:
The City of Auburn Utilities 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 Utilities
Sections.
(Changes to ownership shall be reported to the City of Auburn's Utilities Section.)
Storm Water Easement and Maintenance Agreement
Page 9 of 17
INSPECTION/MAINTENANCE CHECKLIST
STRUCTURE
DATE INS
PE +TIO AIN
TENANC
Results/
Maintenance
Date
Inspection
All Catch Basins
Results
Maintenance
Done
Storm Detention/
Inspection
Wet Pond
Results
Maintenance
Done
Inspection
Conveyance Pipes
Results
Maintenance
Done
Flow Control
Inspection
Structure
Results
Maintenance
Done
Storm Water Easement and Maintenance Agreement
Page 10 of 17
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.
No.1 - Detention Ponds
Maintenance
.
Defect
Conditions When Maintenance Is
Results Expected When
.
component
Needed;:
"Mamtinance: WPerformed
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
and Pollution
contaminants or other pollutants
present.
(Coordinate removal/cleanup with
local water quality response agency).
Rodent Hales
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 11 of 17
No.1 - Detention Ponds
Maintenance
Defect'
Conditions When Maintenance+Is
Results Expected When
Component
y
Needed
Maintenance,isiRe"
domed
.
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
e.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%u 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 fully
Applicable)
three 1/4-inch holes in it.
covered.
Storm Water Easement and Maintenance Agreement
Page 12 of 17
No.1 - Detention Ponds
Maintenance
Defect
Conditions When MaintenanceIs`
Resulfs Expected When
`r
t
Componen
Needed `.r
~d
:ramtenance~ls Perfo~med~kss4
M
Pond Berms
Settlements
Any part of berm which 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 bemUspillway,
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.
(Rip-rap on inside slopes need not
be replaced.)
I
Erosion
See "Side Slopes of Pond"
Storm Water Easement and Maintenance Agreement
Page 13 of 17
No. 4 - Control StructurelFlow Restrictor
,:Manance
inte
Defect
Conrd"vie't.'i+on
Maintenance" is"heeded
FiesultsfExpectedF,YY,
,Component . ~
n c
f~~
h n Maintenance`,.
W
'
a
Y t
,Y v r s
i
~
yfia
Performed .
eriT
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 water tight;
structure repaired or
replaced and works
as designed.
Any holes--other than designed holes--in
Structure has no
the 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.
Gate cannot be moved up and down by one
Gate moves up and
maintenance person.
down easily and is
watertight.
Chain/rod 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 14 of 17
No. 5 - Catch Basins
Maintenance :
Defect
'Conditions:Whim Maintenance fis Needed
Results'60ected4hen
XomPonenW'
v
~ '
Mairitenance~is .
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
separation of more than 3/4 inch of the frame
the riser rings or top slab
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.
Storm Water Easement and Maintenance Agreement
Page 15 of 17
No. 5 - Catch Basins
Maintenance
(Defect
Conditions When Maintenance is,Needed; r
ResultsEx cted'When'
C6mponenta
fiAaintenance9is~
pert crmed
Vegetation growing 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
Cover can be removed by
to Remove
after applying normal lifting pressure.
one maintenance person.
(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 Basement and Maintenance Agreement
Page 16 of 17
No.11 - Wetponds
Maintenance ;
tDefect
Gandition WhendMarntenance
Results Expected'When Maintenance
Componentx
Needed
is Perforrtiedr~rY . • ,
General
Water level
First cell is empty, doesn't hold
Line the first cell to maintain at least 4
water.
feet of water. Although the second cell
may drain, the first cell must remain full to
control turbulence of the incoming flow
and reduce sediment resuspension.
Trash and
Accumulation that exceeds 1
Trash and debris removed from pond.
Debris
CF per 1000-SF of pond area.
Inlet/Outlet
Inlet/Outlet pipe clogged with
No clogging or blockage in the inlet and
Pipe
sediment and/or debris
outlet piping.
material.
Sediment
Sediment accumulations in
Sediment removed from pond bottom.
Accumulation
pond bottom that exceeds the
in Pond
depth of sediment zone plus 6-
Bottom
inches, usually in the first cell.
Oil Sheen on
Prevalent and visible oil sheen.
Oil removed from water using oil-
Water
absorbent pads or vector truck. Source of
oil located and corrected. If chronic low
levels of oil persist, plant wetland plants
such as Juncus effusus (soft rush) which
can uptake small concentrations of oil.
Erosion
Erosion of the pond's side
Slopes stabilized using proper erosion
slopes and/or scouring of the
control measures and repair methods.
pond bottom, that exceeds 6-
inches, or where continued
erosion is prevalent.
Settlement of
Any part of these components
Dike/berm is repaired to specifications.
Pond
that has settled 4-inches or
Dike/Berm
lower than the design elevation,
or inspector determines
dike/berm is unsound.
Internal Berm
Berm dividing cells should be
Berm surface is leveled so that water
level.
flows evenly over entire length of berm.
Overflow
hock is missing and soil is
Rocks replaced to specifications.
Spillway
exposed at top of spillway or
outside slope.
Storm Water Easement and Maintenance Agreement
Page 17 of 17