HomeMy WebLinkAboutStonewood Apartments - Stormwater Maintenance AgreementH
ivision
1 N N. 2"" st — 2"d Floor
Yakima, WA 98901
STORMWATER MAINTENANCE AGREEMENT
THIS AGREEMENT TO MAINTAIN STORMWATEA FACILITIES IS ENTERED INTO TI4lS DAY OF
201_, BY AND BETWEEN THE CITY OF YAKIMA (HEREINAFTER -CITY-) AND VBT MNEWOOD LIP AND ITS HEIRS,
SUCCESSORS, OR ASSIGNS (HEREINAFTER 'LANDOWNER").
SWPPP Permit No.: SWPPP180014 Parcel No.: 23040, 23046
Parcel Full' Legal Description:
N ISE FT OF W 2SIS FT OF N1/2 NEI/4 SWI/4 NWI/4 AND N 140 FT OF E 264 FT OF N1/2 NW1/4 SWI/4
NW114, EX 1-82 R/W
W 178 FT OF E 264 FT OF N1/2 NWI/4 SWI/4NWI/4 EX N 140 FT EX RD AL S LN
Project Name: Stonewood Apartments
Address: 120S East Spruce Street
WITNESSETH
WHEREAS, the Landowner has submitted for approval by the City a permit application and Site Plan, which
require the construction and installation of stormwater management facilities pursuant to the City of Yakima
Post -Construction Stormwater Runoff Ordinance; and
WHEREAS, the Post -Construction Storm rater Runoff Ordinance requires, as a condition of permit approval, a
maintenance agreement between the City and the Landowner to ensure the Landowner will construct and
maintain the stormwater facilities identified in the Site Plan,- and
WHEREAS, the City and the undersigned, its successors and assigns, including any homeowners association,
agree that the health, safety, and welfare of the residents of the City of Yakima, Washington requires that on-
site stormwater management facilities be constructed and maintained on the Property; and
Stormwater Maintenance Agreement (April 2018) Page 1
WHEREAS, under said Ordinance it is provided that private stormwater management facilities must be
maintained by the property owner, and a maintenance agreement must be executed before the development
plan is approved.
NOWar RE- in conside-ratj-qn of the for gping-wrimses; Dvenaftts contained hereiin� and thie
following tents and conditions, the parties hereto agree as follows:
1. The Landowner shall construct and install stormwater management facilities as depicted and shown
on the Site Plan, in accordance with the plans and specifications (aftachi Site Plan that shows type and
locatiM n of stormwater facilities to be maintained).
stormwater management,
7. The Landowner, its executors, administrators, assigns, and any other successors in interest, shall
indemnify and hold the City and its agents and its employees, harmless for any and all damages,
accidents, casualties, occurrences, or claims which might arise or be asserted against the City from the
construction, presence, existence, or maintenance of the stormwater management facilities by the
Landowner or the City.
R. In the event a claim is asserted against the City, its agents, or employees, the City shall notify the
Landowner and the Landowner shall defend at his own expense any suit based on such claim. if any
judgment or claims against the City, its agents, or its employees shall be allowed, the Landowner shall
pay all costs and expenses in connection therewith.
9. This Agreement shall be recorded among the land records of Yakima County, Washington, and shaH
constitute a covenant running with the land, and shall be binding on the Landowner, its
administrators, executors, assigns, heirs, and any other successors in interest.
Stormwater Maintenance Agreement (April 2018) Page 2
- I I ORRAW"WN -
Agreement to besigned, sealed and delivered:
F-Iffl.
«-
Name/Title
Address
err- . - ) ss.
County of Va*rrna
I certify that I know or have satisfactory evidence that
5
is/are the person(s) who appeared before me, and said person(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 prf
mentioned in the instrument.
Witness my hand and official seal hereto affixed the day and year first above, written.
Notary Public in and for the State of Wash!
residing in-Tk(ZrVX*,
Dated at Yakima, Washington, this day of 2018.
Approved By:
City Egin�ee�
Ci n
C I i
ttt as
C[-1y'CONTRAcT NO:
RAS OLU110N NO:
Stornawater Maintenance Agreement (April 2018) Page 3
This project is not subject to this Core Element since the proposed management f4cilities retain
and infiltrate all storniWater on-sith.
#
Current civil design plans, including stormwater improvements, are included as an attachment,
The hydrologic analysis for the system was performed in HydroCAD and the results are attached.
7.1 On -Site Storr Design
A detailed stormwater site plan has been developed showing planned stormwater facilities and is
attached, The stormwater system was designed to infiltrate the Type IA, 25 -year, 24-hour design
storm using the design infiltration rate.
7.3 Storinwater Quality Control
Treatment for TSS, dissolved metals, oil, and grease is provided with the use of infiltration
facilities.
Storm titer Report
PLSA Project No. 18216
November 20, 2018
Pae 4
No. 1 — Wetponds
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 o000 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
hazard to maintenance personnel or
public might normally be. (Coordinate
Weeds
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, gasdine,
No contaminants or pollutants present,
and Pollution
contaminants or other pollutants
(Coordinate removaUcleanup with
local water quality response agency).
Rodent Holes
Any evidence of rodent holes if
Rodents destroyed and dam or be
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.)
September 2004 Chapter 5 — Runoff Treatment Facility Design
M# t
."r Dams
Damresults change rl I function of
y + IM M..l
Facility designfunction.
.r
the facility.
(Coordinate trapping of beavers and
removal of dams with appropriate
permitting ag
-��i� . such �as wasps and� �
' sect r- M ° t t d M M
�
y a interfere
activities.
Apply insectid: des in compliance with
adopted M'.. 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 (Le., slope
recycled into mulch or other beneficial
mowjngoval,t :'... M or
i alders forMMM
equipment ■ areRemove
r M
• . w: y trees.
M not remove.
If dead, diseased, or dying
identified.
(Use a certified Arborlst toArbor: determine
of tree or removal
Side Slopes
Eroded damage over 2 inches deep
Slope should be stabilized using
s
of Pond
where cause of damage is still
appropriath erosion control rheasure(s);
presenthealth
or where there is potential for
-t., rock reinforcement, planting o
continued erosion.
graompaction.
,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 M.
erosion.
Storage 1..
Accumulated .y:. -.y -n:.: exceeds
., y''.., ,„ .r: 'M M'. M i I m# M#.,M
10% oft designed pond M.•M'',:
shape and t:^• pond reseeded if
otherwise specified or affects
necessary to control erosion.
inletting or outletting conditioh of the
facility.Unless
ISI 'w U
III blll� �I Ilii) a, M _than
VMI '*
NN iii 4
yr. �w� ISI U_IId o eIpiI�IIV*II► d Liner is
1
.ppli
threeble*
covered.
o.1 — Wetponds
Maintenance Defect
Conditions When Maintenance Is
Results Expected When
Component
Needed
Maintenance Is Performed
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 be 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 condificim)
Emergency Tree GroWth
Tree growth or, 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
be which could lead to failure of
restoration.
the berm.
Piping
Discemable 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.)
September 2004 Chapter 5 — Runoff Treatment Facility Design 5A-3
. 1 — Wetponds
Maintenance Defect
Conditions When Maintenance Is
Results Expected When
Component
Needed
Maintenance Ils, performed
Emergency Emergency
Only eine layer of rock exists above
locks and pad depth are restored to
Overflow/ Overflow/
native soil in area five square feet or
design standards.
Spillway
larger, or any exposure of native sail
Spillway
at the top of out flow path of spillway.
(Rip -rap on inside slopes need not be
replaced.)
General Water level
First cell is empty, doesn't hold water;
Line the first cell to maintain at least 4
feet of water, Although the second
cell may drain, the first cell must
remain full to control turbulence of the
incoming flown and reduce sediment
resuspension;
Trash and
Accumulation that exceeds i CF per
Trash and debris removed from pond.
Debris
1000 -SF of pond area.
Inlet/Outlet Pipe
Inlet/Outlet pipe clogged with
No clogging or blockage in the inlet
sediment and/or debris material:
and outlet piping.
Sediment
Sediment accumulations in pend
Sediment removed from pond bottom.
Accumulation in
bottom that, exceeds the depth of
Pond Bottom
sediment zone plus 6 -inches, usually
in the first cell.
Oil Sheen on
Prevalent and visible oil sheen.
Coil 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 :/uncus
effusus (soft rush) which can uptake
small concentrations of oil.
Erosion
Erosion of the pond's side slopes
Slopes stabilized using proper
and/or scouring of the pond bottom,
erosion control measures and repair
that exceeds 6 -inches, or where
methods.,
continued erosion is prevalent.
Settlement of
Any part of these components' that
Dikelberm is repaired to
Pond Dike/Berm
' has settled 4 -inches or lower than the
specifications.
design elevation, or inspector
determines dike/berm is unsound.
Internal Bernd
Berm dividing cells should be level.
Berra surface is leveled so that water
flows evenly over entire length of
berm.
Overflow
Pock is missing and soil is exposed
Flocks replaced to specifications.
Spillway
at top of spillway or outside slope.
Chapter 5 — Runoff Treatment Facilityr resign September 2004
Bio-infiltration/Infiltration Tren eat asi s
Maintenance
� Defect �
Conditions When Maintenance Is ��
-- Results Expected
Component
eek d
Whop Maintenance Is
Perfoffned
General
Trash & Debris
See"Wetponds" (No. 1).
See "Wetponds" (No. 1).
Poisonous/Noxious
See "Wetponds" (No. 1).
See "Wetponds" (No. 1).
Vegetation
Contaminants and
See "Wetponds" (No. 1).
See "Wetponds" (No, 1).
Pollution
Rodent Roles
See "Wetponds" (No. 1)
See "Wetponds" (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
works according
systepercolation
test it or test of facility
( p p Y
to desir
to design.
indicates facility is only working at 90% of
its designed capabilities. If two inches or
more sediment is present, remove).
Rack Filters
Sediment and
By visual inspection, little or no water flows
Gravel in rock filter is
Debris
through filter during heavy rain storms.
replaced.
Side Slopes of
Erosion
S "Wetponds" (No. -1).
See "Wetponds" (No. 1).
Fond'
Emergency
Tree Growth
See "Wetponds" (No. 1).,
See "Wetponds' (No. 1),
Overflow Spillway
and Berms over
feet in height;
Piping
See "Wetponds" (No. 1).
See "Wetponds" (No. 1).
Emergency
Rack Missing
See "Wetponds" (No. 1).
See "Wetponds" (No. 1).
Overflow Spillway
Erosion
See "Wetponds" (No._ 1).
See "Wetponds" (No. 1).
Ire -Settling Ponds
Facility or sump
" or designed sediment trap depth of
Sediment is removed.
and Vaults
filled with Sediment
sediment:
and/or debris
September 2004 Chapter 5 -- Runoff Treatment Facility Dein A-
ae 5 Itch Basins
intsnanice Defect
Conditions When Maintenance Is Needed
Results Expeoted When
ComponentMaintenance
is
performed
General Trash &
Trash or debris which is located immediately
No Trash or debris located
Debris
In front of the catch basin opening or is
immediately in front of
blocking inletting capacity of the basin by
catch basin or on grate
more than 10%.
opening.
Trash or debris tin the basin) that exceeds
No trash or debris in the
bag% of the sump depth as measured from the
catch basin.
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 debris surface to the invert of the lowest
pipe.
Trash or debris in any inlet or outlet pipei
Inlet and outlet pipes free
blacking more than 113 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 tin 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 S 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
Tap 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 the
separation of more than 314 inch of the frame
riser rings or top slab and
from the top slab, Frame not securely
firstly attached.
attached
Fractures or
Maintenance person judges that structure is
Basin replaced or repaired
Cracks in
unsound.
to design standards.
Basin Walls/
Bottom
Grout fillet has separated or cracked wider
Pipe is regrouted and
than /2 inch and lunger than 1 foot at the
secure at basin wail,
joint of any inletJoutlet pipe or any evidence of
soil particles entering catch basin through _
cracks.
Settlementt
if failure of basin has created a safety,
Basin replaced or repaired
Misalignment
function, or design problem:
to design standards.
Vegetation
Vegetation growing across and blocking more
No vegetation blocking
than 10% of the basin opening.
opening to basin.
Vegetation growing in inlet/outlet pipe joints
No vegetation or root
that is more than slay inches tall and less than
growth present.
six inches apart.
. 5 — Gatch Basins
Maintenance
Defect t
ConditionsWien Mal7ritanance is Needed
Results Expected When
Component
ai tenan a is
perfortned,
Contamination
See "Wetponds" (No. 1).
No pollution present.
and Pollution
Catch Basin Ferrer
Cover Not in
Craver is missing or only partially in place.
Catch basin cover us closed
Place
Any open catch basin requires maintenance.
Locking
Mechanism cannot be opened by one
Mechanism opens with
Mechanism
maintenance person with proper tools. Bolts
proper tools.
Not 'J Working
into frame have less than 112 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 avail,
standards and alloys
misalignment, rust,: cracks, or sharp edges.,
maintenance person safe
access.
Metal Crates
Grate opening
Crate with opening wider than 718 inch.
Crate 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 meets
Missing.
grate.
design standards.