Storm Water Facilities Maintenance Agreement 2023-00864494/4/23, 1:33 PM
Batch 15552981 Confirmation
RECORDING REQUESTED BY:
CITY OF POWAY
AND WHEN RECORDED MAIL TO:
CITY CLERK
CITY OF POWAY
P O BOX 789
POWAY, CA 92074
APN: 314-192-02-00
DOC# 2023-0086449
IIIIII IIIII IIIII IIIII IIII IIIIII IIIII IIIII IIIII IIIII IIIII IIIII IIII IIII
Apr 04, 2023 12:59 PM
OFFICIAL RECORDS
JORDAN Z. MARKS,
SAN DIEGO COUNTY RECORDER
FEES: $0.00 (SB2 Atkins: $0.00)
POOR: N/A
PAGES: 31
(THIS SPACE FOR RECORDER'S USE)
STORM WATER FACILITIES
MAINTENANCE AGREEMENT
McKee Orchard
(G22-0006)
The undersigned grantor(s) declares:
Documentary Transfer Tax is $ -0- pursuant to R & T Code 11922 (conveyance to a Government Agency)
This AGREEMENT for the maintenance and repair of certain Storm Water Facilities is entered into
between the Property Owner(s) MCKEE ORCHARD LLC., (hereinafter referred to collectively as
"OWNER") and the City of Poway (hereinafter referred to as "CITY") for the benefit of the CITY, the
OWNER, the successors in interest to the CITY or the OWNER, and the public generally.
WHEREAS, OWNER is the owner of certain real property located in the City of Poway, California, more
particularly described in Exhibit "A", hereto (hereinafter referred to as the "PROPERTY"), which is being
developed into 20 single-family residential lots, in accordance with applications for a Tentative Tract
Map 21-003, Development Review 21-002 and Grading Permit Number G22-0006, which are on file
with the CITY. This Agreement is required as a condition of approval for such development and shall
apply to each of the Lots 1 — 20 after recordation of the final map.
WHEREAS, in accordance with the City of Poway's Stormwater Management and Discharge Control
Ordinance, Poway Municipal Code, Chapters 13 and 16 (the "Stormwater Ordinance"), the City of
Poway Subdivision Ordinance, the City of Poway Zoning Ordinance, the City of Poway Grading
Ordinance and/or other ordinances or regulations of CITY which regulate land development and urban
runoff, OWNER has proposed that storm water runoff from the PROPERTY be managed by the use of
the following Storm Water Facilities which are identified as "Best Management Practices" or "BMPs":
45 tree wells and 16 infiltration trenches with underdrains located throughout the site as shown on
Exhibit "B".
The precise location(s) and extent of the BMPs are indicated on the approved grading plans on file with
CITY's Development Services Department as G22-0006. The manner and standards by which the
BMPs must be repaired and maintained in order to retain their effectiveness and the approximate
location of the BMPs are as set forth in the Operation and Maintenance Plan (hereinafter "O&M PLAN"),
which is attached hereto and incorporated herein as Exhibit "C".
Because additional impervious area may require the addition of or alteration of storm water facilities
and strategies, no impervious area may be added to the project site without prior approval from the City
hftps:Hgs.secure-recording.com/Batch/Confirmation/15552981 1 /2
RECORDING REQUESTED BY:
CITY OF POWAY
AND WHEN RECORDED MAIL TO:
CITY CLERK
CITY OF POWAY
P O BOX 789
POWAY, CA 92074
APN: 314-192-02-00
(THIS SPACE FOR RECORDER'S USE)
STORM WATER FACILITIES
MAINTENANCE AGREEMENT
McKee Orchard
(G22-0006)
The undersigned grantor(s) declares:
Documentary Transfer Tax is $ -0- pursuant to R & T Code 11922 (conveyance to a Government Agency)
This AGREEMENT for the maintenance and repair of certain Storm Water Facilities is entered into
between the Property Owner(s) MCKEE ORCHARD LLC., (hereinafter referred to collectively as
"OWNER") and the City of Poway (hereinafter referred to as "CITY") for the benefit of the CITY, the
OWNER, the successors in interest to the CITY or the OWNER, and the public generally.
WHEREAS, OWNER is the owner of certain real property located in the City of Poway, California, more
particularly described in Exhibit "A", hereto (hereinafter referred to as the "PROPERTY"), which is being
developed into 20 single-family residential lots, in accordance with applications for a Tentative Tract
Map 21-003, Development Review 21-002 and Grading Permit Number G22-0006, which are on file
with the CITY. This Agreement is required as a condition of approval for such development and shall
apply to each of the Lots 1 — 20 after recordation of the final map.
WHEREAS, in accordance with the City of Poway's Stormwater Management and Discharge Control
Ordinance, Poway Municipal Code, Chapters 13 and 16 (the "Stormwater Ordinance"), the City of
Poway Subdivision Ordinance, the City of Poway Zoning Ordinance, the City of Poway Grading
Ordinance and/or other ordinances or regulations of CITY which regulate land development and urban
runoff, OWNER has proposed that storm water runoff from the PROPERTY be managed by the use of
the following Storm Water Facilities which are identified as "Best Management Practices" or "BMPs":
45 tree wells and 16 infiltration trenches with underdrains located throughout the site as shown on
Exhibit "B".
The precise location(s) and extent of the BMPs are indicated on the approved grading plans on file with
CITY's Development Services Department as G22-0006. The manner and standards by which the
BMPs must be repaired and maintained in order to retain their effectiveness and the approximate
location of the BM Ps are as set forth in the Operation and Maintenance Plan (hereinafter "O&M PLAN"),
which is attached hereto and incorporated herein as Exhibit "C".
Because additional impervious area may require the addition of or alteration of storm water facilities
and strategies, no impervious area may be added to the project site without prior approval from the City
Engineer. Additional impervious area includes, but is not limited to, patio covers, hardscape
improvements, and building additions.
WHEREAS, OWNER's representations that the BMPs will be maintained have been relied upon by
CITY in approving OWNER's development applications. It is the purpose of this Agreement to assure
that the BMPs are maintained, by creating obligations that are enforceable against the OWNER and
the OWNER's successors in interest in the PROPERTY. It is intended that these obligations be
enforceable notwithstanding other provisions related to BMP maintenance that are provided by law.
NOW, THEREFORE, for consideration of (a) CITY's approval of the above development applications
and (b) the mutual covenants set forth herein, IT IS HEREBY AGREED AS FOLLOWS:
Incorporation of Recitals. The recitals set forth above are incorporated herein by this reference
and constitute a part of this AGREEMENT
2. Maintenance of Storm Water Facilities. OWNER agrees, for itself and its successors in
interest, to all or any portion of the PROPERTY, to comply in all respects with the requirements
of the Stormwater Ordinance with regards to the maintenance of BMPs, and in particular agrees
to perform, at its sole cost, expense and liability, the following "MAINTENANCE ACTIVITIES":
all inspections, cleaning, repairs, servicing, maintenance and other actions specified in the O&M
PLAN, with respect to all of the BMPs listed above, at the times and in the manner specified in
the O&M PLAN. OWNER shall keep records of this maintenance and provide copies of such
records and annual certification of maintenance as requested by CITY. OWNER shall initiate,
perform and complete all MAINTENANCE ACTIVITIES at the required time, without request or
demand from CITY or any other agency. OWNER further agrees that "MAINTENANCE
ACTIVITIES" shall include replacement or modification of the BMPs in the event of failure.
Replacement shall be with an identical type, size and model of BMP, except that:
(a) The City Engineer may authorize substitution of an alternative BMP if he or she
determines that it will be as effective as the failed BMP; and
(b) If the failure of the BMP, in the judgment of the City Engineer, indicates that the BMP in
use is inappropriate or inadequate to the circumstances, the BMP must be modified or
replaced with a more effective BMP to prevent future failure in the same or similar
circumstances.
Notices. OWNER further agrees that it shall, prior to transferring ownership of any land on
which any of the above BMPs are located, or any lot or portion of the PROPERTY which is
served by the above BMPs, and also prior to transferring ownership of any such BMP, provide
clear written notice of the above described maintenance obligations to the transferee.
4. CITY's Right to Perform Maintenance. It is agreed that CITY shall have the right, but not the
obligation, to elect to perform any or all of the MAINTENANCE ACTIVITIES if, in the CITY's sole
judgment, OWNER has failed to perform the same. Such maintenance by the CITY shall be
conducted in accordance with the nuisance abatement procedures set forth in Poway Municipal
Code Chapter 8.72. In the case of maintenance performed by the CITY, it may be performed
by CITY forces, or a contractor hired by the CITY, at the CITY's sole election. It is recognized
and understood that the CITY makes no representation that it intends to or will perform any of
the MAINTENANCE ACTIVITIES, and any election by CITY to perform any of the
MAINTENANCE ACTIVITIES shall in no way relieve OWNER of its continuing maintenance
obligations under this agreement. If CITY elects to perform any of the MAINTENANCE
ACTIVITIES, it is understood that CITY shall be deemed to be acting as the agent of the OWNER
and said work shall be without warranty or representation by CITY as to safety or effectiveness,
SWFMA (G22-0006) Page 2
shall be deemed to be accepted by OWNER "as is", and shall be covered by OWNER's
indemnity provisions below.
If CITY performs any of the MAINTENANCE ACTIVITIES, after CITY has demanded that
OWNER perform the same and OWNER has failed to do so within a reasonable time stated in
the CITY's demand, then OWNER shall pay all of CITY's costs incurred in performing the
MAINTENANCE ACTIVITIES, plus an administrative fee. OWNER's obligation to pay CITY's
costs of performing MAINTENANCE ACTIVITIES is a continuing obligation. If OWNER fails to
pay CITY's costs for performing MAINTENANCE ACTIVITIES, CITY may assess a lien on the
property or properties of the responsible parties pursuant to the procedures set forth in Poway
Municipal Code Chapter 8.72.
5. Grant of Easement to CITY. OWNER hereby grants to CITY a perpetual easement over, under
and across all of the PROPERTY, for purposes of accessing the BMPs, inspecting the BMPs,
and performing any of the MAINTENANCE ACTIVITIES specified in Paragraph 1 above. CITY
shall have the right, at any time and upon reasonable notice to OWNER, to enter upon any part
of said area as may be necessary or convenient for such purposes. OWNER shall at all times
maintain the PROPERTY so as to make CITY's access clear and unobstructed.
6. Administration of Agreement for CITY. CITY hereby designates the City Engineer as the
officer charged with responsibility and authority to administer this Agreement on behalf of CITY.
Any notice or communication to the City related to the implementation of this Agreement shall
be addressed to:
City Engineer
City of Poway
13325 Civic Center Drive
Poway, CA 92064
7. Defense and Indemnity. CITY shall not be liable for, and OWNER and its successors in interest
shall defend and indemnify CITY and the employees and agents of CITY (collectively "CITY
PARTIES"), against any and all claims, demands, liability, judgments, awards, fines, mechanic's
liens or other liens, labor disputes, losses, damages, expenses, charges or costs of any kind or
character, including attorneys' fees and court costs (hereinafter collectively referred to as
"CLAIMS"), related to this Agreement (specifically including but not limited to OWNER's alleged
noncompliance with the Stormwater Ordinance), and arising either directly or indirectly from any
act, error, omission or negligence of OWNER, OWNER's successors, or their contractors,
licensees, agents, servants or employees, including, without limitation, claims caused by the
concurrent negligent act, error or omission, whether active or passive, of CITY PARTIES.
OWNER shall have no obligation, however, to defend or indemnify CITY PARTIES from a claim
if it is determined by a court of competent jurisdiction that such claim was caused by the sole
negligence or willful misconduct of CITY PARTIES. Nothing in this Agreement, CITY's approval
of the development application or plans and specifications, or inspection of the work is intended
to acknowledge responsibility for any such matter, and CITY PARTIES shall have absolutely no
responsibility or liability therefore unless otherwise provided by applicable law.
8. Allocation of Costs. Following the sale or transfer of any individual residential lots by OWNER,
the cost of the MAINTENANCE ACTIVITIES required by this Agreement shall be divided equally
by all lot owners, and paid by each lot owner or his or her heirs, assigns and successors in
interest. This requirement shall be binding on all lot owners in the subdivision, and each shall
be responsible for his or her equal share of the cost associated with the maintenance.
9. Agreement Binds Successors and Runs With the PROPERTY. It is understood and agreed
SWFMA (G22-0006) Page 3
that the terms, covenants and conditions herein contained shall constitute covenants running
with the land and shall be binding upon the heirs, executors, administrators, successors and
assigns of OWNER and CITY, shall be deemed to be for the benefit of all persons owning any
interest in the PROPERTY (including the interest of CITY or its successors in the easement
granted herein). It is the intent of the parties hereto that this Agreement shall be recorded and
shall be binding upon all persons purchasing or otherwise acquiring all or any lot, unit or other
portion of the PROPERTY, who shall be deemed to have consented to and become bound by
all the provisions hereof.
10. OWNER's Continuing Responsibilities Where Work Commenced or Permit Obtained.
Notwithstanding any other provision of this Agreement, no transfer or conveyance of the
PROPERTY or any portion thereof shall in any way relieve OWNER of or otherwise affect
OWNER's responsibilities for installation or maintenance of BMPs which may have arisen under
the ordinances or regulations of CITY referred to in this Agreement, or other federal, state or
CITY laws, on account of OWNER having obtained a permit which creates such obligations or
having commenced grading, construction or other land disturbance work.
11. Amendment and Release. The terms of this Agreement may be modified only by a written
amendment approved and signed by the Director of Development Services acting on behalf of
CITY and by OWNER or OWNER's successor(s) in interest. This Agreement may be terminated
and OWNER and the PROPERTY released from the covenants set forth herein, by a release,
which CITY may execute if it determines that another mechanism will assure the ongoing
maintenance of the BMPs or that it is no longer necessary to assure such maintenance.
12. Governing Law and Severability. This Agreement shall be governed by the laws of the State
of California. Venue in any action related to this Agreement shall be in the Superior Court of the
State of California, County of San Diego. OWNER hereby waives any right to remove any such
action from San Diego County as is otherwise permitted by California Code of Civil Procedure
Section 394. In the event that any of the provisions of this Agreement are held to be
unenforceable or invalid by any court of competent jurisdiction, the validity, and enforceability of
the remaining provisions shall not be affected thereby.
13. Attorney's Fees. The prevailing party in any action or proceeding to enforce or interpret the
terms of this Agreement shall be entitled to recover all of its reasonable litigation expenses,
including its expert fees, attorneys' fees, courts costs, arbitration costs, and any other fees.
IN WITNESS WHEREOF, the parties have executed this Agreement on the dates set forth hereinafter.
OWNER: MCKEE ORCHARD LLC.
A California limited liability company
/' By: CORNERSTONE COMMUNITIES LLC
a California limited liability company
!1'
1
By:
Ure R`.' --KCetQwicz, Manager
Its: Member and Manager
Date: % 10
(signature must be notarized)
SWFMA (G22-0006) Page 4
CITY OVYOWAY:
KobgVt J. Manis
Director of Development Services
APPROVED AS TO FORM:
Office of the City Attorney
City Attorney
Date: L1,00
(signature must be notarized)
Attachments
1. Certificate of Acceptance
2. Exhibit A — Legal Description of Property
3. Exhibit B — Location of BMPs
4. Exhibit C — Operation and Maintenance Plan
APPROVED AS TO CONTENT:
Engineering Division
Tracy Qach, P.E.
City Engineer
SWFMA (G22-0006) Page 5
CALIFORNIA NOTARY ACKNOWLEDGEMENT
A notary public or other officer completing this certificate verifies only the identity of the individual who
signed the document to which this certificate is attached, and not the truthfulness, accuracy, or validity
of that document.
State of California
County of San D i 1p
On arch to". 1o23 before me, CarolfNo+arH Publ;c- (insert name and title of the
officer), personally appeared u r e 9 krel-owi c z who proved to me on the
basis of satisfactory evidence to be the person(s) whose name(s) is/are subscribed to the within
instrument and acknowledged to me that he/she/they executed the same in his/her/their authorized
capacity(ies), and that by his/her/their signature(s) on the instrument the person(s), or the entity upon
behalf of which the person(s) acted, executed the instrument.
I certify under PENALTY OF PERJURY under the laws of the State of California that the foregoing
paragraph is true and correct.
WITNESS my hand and official seal. �,��•,�>,� CAROLINELARSON
Notary Public • California
San Diego County
�-- Commission # 2338912
--�'� '�� � "� My Comm. Expires Dec 30, 2024
Signature �! (Seal)
CALIFORNIA ALL-PURPOSE ACKNOWLEDGMENT
CIVIL CODE § 1189
A notary public or other officer completing this certificate verifies only the identity of the individual who signed the
document to which this certificate is attached, and not the truthfulness, accuracy, or validity of that document.
State of California )
County of San Diego )
On March 29, 2023 before me, Yvonne Mannion, Notary Public
Date Here Insert Name and Title of the Officer
personally appeared Robert J. Manis
Name(s) of Signer(s)
who proved to me on the basis of satisfactory evidence to be the person(s) whose name(s) is/are
subscribed to the within instrument and acknowledged to me that he/she/they executed the same in
his/her/their authorized capacity(ies), and that by his/her/their signature(s) on the instrument the
person(s), or the entity upon behalf of which the person(s) acted, executed the instrument.
I certify under PENALTY OF PERJURY under the laws
of the State of California that the foregoing paragraph
is true and correct.
WITNESS my hand and official seal.
*my
YVONNE MANNION
Notary Public - California
San Diego CountyCommission # 2363699 Signature Comm, Expires Jul 1, 2025 Signature of Notary Public
Place Notary Seal Above
OPTIONAL
Though this section is optional, completing this information can deter alteration of the document or
fraudulent reattachment of this form to an unintended document.
Description of Attached Document
Title or Type of Document: Storm Water Facilities Maintenance Agreement G22-0006
Document Date:
Signer(s) Other Than Named Above:
Capacity(ies) Claimed by Signer(s)
Signer's Name:
❑ Corporate Officer — Title(s):
❑ Partner — ❑ Limited ❑ General
❑ Individual ❑ Attorney in Fact
❑ Trustee ❑ Guardian or Conservator
n ether:
Signer Is Representing:
Number of Pages:
Signer's Name:
❑ Corporate Officer — Title(s):
❑ Partner — ❑ Limited ❑ General
❑ Individual ❑ Attorney in Fact
❑ Trustee ❑ Guardian or Conservator
n nther:
Signer Is Representing:
1K
CERTIFICATE OF ACCEPTANCE
(Storm Water Facilities
Maintenance Agreement)
This is to certify that the interest in real property located in the City of Poway conveyed by the
Grant of Easement described in Item 5 of the attached document dated 10 12=5 , from
MCKEE ORCHARD LLC., to the City of Poway, a political corporation and/or governmental agency, is
hereby accepted by the undersigned officer or agent on behalf of the City Council pursuant to authority
conferred by Resolution No. 17-007 adopted on April 18, 2017.
Dated: 4''! CITY OF POWAY
Seal:
By: -
R bent J. Mani
Department of Development ervices
EXHIBIT "A"
LEGAL DESCRIPTION
THE LAND REFERRED TO HEREIN BELOW IS SITUATED IN THE CITY OF POWAY, IN THE COUNTY OF
SAN DIEGO, STATE OF CALIFORNIA, AND IS DESCRIBED AS FOLLOWS:
THAT PORTION OF THE NORTH HALF OF THE NORTHEAST QUARTER OF SECTION 12, TOWNSHIP 14
SOUTH, RANGE 2 WEST, SAN BERNARDINO BASE AND MERIDIAN, IN THE CITY OF POWAY, COUNTY OF
SAN DIEGO, STATE OF CALIFORNIA, ACCORDING TO UNITED STATES GOVERNMENT SURVEY
APPROVED SEPTEMBER 11, 1879, AND AS SHOWN ON RECORD OF SURVEY MAP NO. 1646, FILED IN
THE OFFICE OF THE COUNTY RECORDER OF SAID COUNTY OCTOBER 16, 1947, DESCRIBED AS
FOLLOWS:
BEGINNING AT A POINT ON THE NORTH LIEN OF SAID NORTHEAST QUARTER DISTANT THEREON
NORTH 89' 19' 50" WEST 662.87 FEET FROM THE NORTHEAST CORNER OF SAID NORTHEAST
QUARTER;
THENCE SOUTH 0° 22' 37" EAST 686.94 FEET;
THENCE NORTH 89' 10' 30" WEST 317.08 FEET TO THE SOUTHEASTERLY CORNER OF LAND
DESCRIBED IN DEED TO DAN F. GOUGH, ET UX., RECORDED AUGUST 11, 1952 IN BOOK 4553, PAGE 483
OF OFFICIAL RECORDS OF SAID COUNTY;
THENCE ALONG THE EASTERLY LINE OF SAID GOUGH'S LAND NORTH 0° 17' 43" WEST 686.64 FEET TO
A POINT ON SAID NORTH LINE OF SAID NORTHEAST QUARTER;
THENCE ALONG SAID NORTH LINE SOUTH 89' 19' 50" EAST 316.82 FEET MORE OR LESS, TO THE POINT
OF BEGINNING.
APN: 314-192-02-00
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Infiltration Basin
BMP MAINTENANCE FACT SHEET
FOR
STRUCTURAL BMP INF-1 INFILTRATION BASIN
An infiltration basin typically consists of an earthen basin with a flat bottom constructed in uncompacted native
soils. An infiltration basin retains storm water and allows it to evaporate and/or percolate into the underlying soils.
Infiltration basins can also be constructed as linear trenches or as underground infiltration galleries. Typical
infiltration basin components include:
• Inflow distribution mechanisms (e.g., perimeter flow spreader or filter strips)
• Energy dissipation mechanism for concentrated inflows (e.g., splash blocks or riprap)
• Forebay to provide pretreatment, or other pretreatment device (e.g., drainage inlet inserts, hydrodynamic
separator installed within storm drain system)
• Surface ponding for captured flows
• Vegetation or other surface cover such as mulch or rocks selected based on basin use, climate, and
ponding depth
• Uncompacted native soils at the bottom of the facility
• Overflow structure
Normal Expected Maintenance
Infiltration basins require routine maintenance to: remove accumulated materials such as sediment, trash or
debris from the forebay and the basin; maintain vegetation health if the BMP includes vegetation; and maintain
integrity of side slopes, inlets, energy dissipators, and outlets. A summary table of standard inspection and
maintenance indicators is provided within this Fact Sheet.
Non -Standard Maintenance or BMP Failure
If any of the following scenarios are observed, the BMP is not performing as intended to protect downstream
waterways from pollution and/or erosion. Corrective maintenance, increased inspection and maintenance, BMP
replacement, or a different BMP type will be required.
The BMP is not drained between storm events. Surface ponding longer than approximately 24 hours
following a storm event may be detrimental to vegetation health, and surface or subsurface ponding
longer than approximately 96 hours following a storm event poses a risk of vector (mosquito) breeding.
Poor drainage can result from clogging of the underlying native soils, or clogging of covers applied at the
basin surface such as topsoil, mulch, or rock layer. The specific cause of the drainage issue must be
determined and corrected. For surface -level basins (i.e., not underground infiltration galleries), surface
cover materials can be removed and replaced, and/or native soils can be scarified or tilled to help
reestablish infiltration. If it is determined that the underlying native soils have been compacted or do not
have the infiltration capacity expected, or if the infiltration surface area is not accessible (e.g., an
underground infiltration gallery) the [City Engineer] shall be contacted prior to any additional repairs or
reconstruction.
Sediment, trash, or debris accumulation has filled the forebay or other pretreatment device within one
month, or if no forebay or other pretreatment device is present, has filled greater than 25% of the surface
ponding volume within one maintenance cycle. This means the load from the tributary drainage area is
too high, reducing BMP function or clogging the BMP. This would require adding a forebay or other
pretreatment measures within the tributary area draining to the BMP to intercept the materials if no
pretreatment component is present, or increased maintenance frequency for an existing forebay or other
pretreatment device. Pretreatment components, especially for sediment, will extend the life of the
infiltration basin.
INF-1 Page 1 of 12
January 12, 2017
INF-1
Infiltration Basin
Erosion due to concentrated storm water runoff flow that is not readily corrected by adding erosion
control blankets, adding stone at flow entry points, or minor re -grading to restore proper drainage
according to the original plan. If the issue is not corrected by restoring the BMP to the original plan and
grade, the [City Engineer] shall be contacted prior to any additional repairs or reconstruction.
Other Special Considerations
If the infiltration basin is vegetated: Vegetated structural BMPs that are constructed in the vicinity of, or
connected to, an existing jurisdictional water or wetland could inadvertently result in creation of expanded waters
or wetlands. As such, vegetated structural BMPs have the potential to come under the jurisdiction of the United
States Army Corps of Engineers, SDRWQCB, California Department of Fish and Wildlife, or the United States Fish
and Wildlife Service. This could result in the need for specific resource agency permits and costly mitigation to
perform maintenance of the structural BMP. Along with proper placement of a structural BMP, routine
maintenance is key to preventing this scenario.
INF-1 Page 2 of 12
January 12, 2017
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SD-1
Tree Wells
BMP MAINTENANCE FACT SHEET
FOR
SITE DESIGN BMP SD-1 TREE WELLS
Tree wells as site design BMPs are trees planted in configurations that allow storm water runoff to be directed into
the soil immediately surrounding the tree. The tree may be contained within a planter box or structural cells. The
surrounding area will be graded to direct runoff to the tree well. There may be features such as tree grates,
suspended pavement design, or shallow surface depressions designed to allow runoff into the tree well. Typical
tree well components include:
• Trees of the appropriate species for site conditions and constraints
• Available growing space based on tree species, soil type, water availability, surrounding land uses, and
project goals
• Entrance/opening that allows storm water runoff to flow into the tree well (e.g., a curb opening, tree
grate, or surface depression)
• Optional suspended pavement design to provide structural support for adjacent pavement without
requiring compaction of underlying layers
• Optional root barrier devices as needed; a root barrier is a device installed in the ground, between a tree
and the sidewalk, intended to guide roots down and away from the sidewalk in order to prevent sidewalk
lifting from tree roots
• Optional tree grates; to be considered to maximize available space for pedestrian circulation and to
protect tree roots from compaction related to pedestrian circulation; tree grates are typically made up of
porous material that will allow the runoff to soak through
• Optional shallow surface depression for ponding of excess runoff
• Optional planter box drain
Normal Expected Maintenance
Tree health shall be maintained as part of normal landscape maintenance. Additionally, ensure that storm water
runoff can be conveyed into the tree well as designed. That is, the opening that allows storm water runoff to flow
into the tree well (e.g., a curb opening, tree grate, or surface depression) shall not be blocked, filled, re -graded, or
otherwise changed in a manner that prevents storm water from draining into the tree well. A summary table of
standard inspection and maintenance indicators is provided within this Fact Sheet.
Non -Standard Maintenance or BMP Failure
Tree wells are site design BMPs that normally do not require maintenance actions beyond routine landscape
maintenance. The normal expected maintenance described above ensures the BMP functionality. If changes have
been made to the tree well entrance / opening such that runoff is prevented from draining into the tree well (e.g.,
a curb inlet opening is blocked by debris or a grate is clogged causing runoff to flow around instead of into the tree
well, or a surface depression has been filled so runoff flows away from the tree well), the BMP is not performing as
intended to protect downstream waterways from pollution and/or erosion. Corrective maintenance will be
required to restore drainage into the tree well as designed.
Surface ponding of runoff directed into tree wells is expected to infiltrate/evapotranspirate within 24-96 hours
following a storm event. Surface ponding longer than approximately 24 hours following a storm event may be
detrimental to vegetation health, and surface ponding longer than approximately 96 hours following a storm event
poses a risk of vector (mosquito) breeding. Poor drainage can result from clogging or compaction of the soils
surrounding the tree. Loosen or replace the soils to restore drainage.
SD-1 Page 1 of 6
January 12, 2017
SD-1
Tree Wells
Other Special Considerations
Site design BMPs, such as tree wells, installed within a new development or redevelopment project are
components of an overall storm water management strategy for the project. The presence of site design BMPs
within a project is usually a factor in the determination of the amount of runoff to be managed with structural
BMPs (i.e., the amount of runoff expected to reach downstream retention or biofiltration basins that process
storm water runoff from the project as a whole). When site design BMPs are not maintained or are removed, this
can lead to clogging or failure of downstream structural BMPs due to greater delivery of runoff and pollutants than
intended for the structural BMP. Therefore, the [City Engineer] may require confirmation of maintenance of site
design BMPs as part of their structural BMP maintenance documentation requirements. Site design BMPs that
have been installed as part of the project should not be removed, nor should they be bypassed by re-routing roof
drains or re -grading surfaces within the project. If changes are necessary, consult the [City Engineer] to determine
requirements.
SD-1 Page 2 of 6
January 12, 2017
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ATTACHMENT 3a
Operations
Project Name
MCKEE ORCHARD
Project/Permit Number(s)
TTM 21-003/DR 21-002/ G22-0006
Project Address
13667 Twin Peaks Rd., Poway, CA 92064
Assessor's Parcel Number(s) (APN(s))
314-192-02-00
Project Watershed
(Complete Hydrologic Unit, Area, and
Los Penasquitos WMA, Poway 906.20
Subarea Name with Numeric Identifier
Responsible Party for Construction Phase
Developer's Name
Presidio Cornerstone
Address
4365 Executive Dr., STE. 600, San Diego, CA 92121
Email Address
Phone Number
858-458-9700
Engineer of Work
SB&O, Inc.
Engineer's Phone Number
858-560-1141
Responsible Party for Ongoing Maintenance
Owner's Name(s)*
Individual Homeowners
Address
N/A, No HOA proposed
Email Address
Phone Number
*Note: If a corporation or LLC, provide information for principal partner or Agent for Service of
Process. If an HOA, provide information for the Board or property manager at time of project
closeout.
29 December 2017