HomeMy WebLinkAboutContract 58857Date Received: 02/10/2023
Time Received: 8:00 a.m.
Permit No.: SWFMA-21-0100
City Secretary No.: 58857
RETAINING WALL
MAINTENANCE AGREEMENT
THIS AGREEMENT, made and entered into this 13th day of February
2023 by and between West FW Automotive Real Estate, LLC, a Texas limited liability
company, acting by and through Jason Hiley, hereinafter referred to as "Landowner", and
the City of Fort Worth, hereinafter referred to as "City".
WITNESSETH
WHEREAS, the Landowner is the owner of certain real property described as an
approximately 10.000-acre tract located in the Hays Covington Survey, Abstract 256,
Tarrant County, Texas according to the deed recorded in D221021108, Deed Records,
Tarrant County, Texas, hereinafter called the "Property".
WHEREAS, the Landowner is proceeding to build on and develop the Property
according to the Site Plan/Subdivision Plan known as Hiley Subaru, hereinafter called the
"Plan", which is expressly made a part hereof, as approved or to be approved by the City
and the Landowner provides for the construction and maintenance of a Retaining Wall
Facility on a portion of the Property being more particularly described by the metes and
bounds in Exhibit "A"; and;
WHEREAS, the City and the Landowner, and their successors and assigns, agree
that the health, safety and welfare of the residents of the City of Fort Worth, Texas require
that a Retaining Wall Facility be constructed and maintained on a portion of the Property;
and;
OFFICIAL RECORD
CITY SECRETARY
FT. WORTH, TX
RETAINING WALL MAINTENANCE AGREEMENT
Rev. 0311512022 BN
WHEREAS, the City requires that a Retaining Wall Facility ("Facility") as shown
on the Plan be constructed and adequately maintained by the Landowner, its successors
and assigns, the location and dimensions of which is shown on the attached Exhibit "A"
("Facility Property"); and;
NOW, THEREFORE, in consideration of the foregoing premises, the mutual
covenants contained herein, and the following terms and conditions, the parties hereto
agree as follows:
1. The Landowner, its successors and assigns, shall adequately construct and
maintain the on -site Retaining Wail Facility ("Facility") at no expense to the
City of Fort Worth in accordance with the design specifications for the Facility,
attached as Exhibit `B", and the current standards then in force and effect in
the City of Fort Worth. Adequate maintenance is herein defined as good
working condition so that these facilities are performing their design functions.
2. The Landowner, its successors and assigns, shall inspect the Facility and
submit an inspection report to the City annually. The purpose of the inspection
is to assure safe and proper functioning of the Facility. The inspection shall
cover the entire Facility, which needs maintenance or replacement to perform
their design function, shall be noted in the inspection report along with the
corrective actions to be taken.
3. The Landowner, its successors and assigns, hereby grant permission to the
City, its authorized agents and employees, to enter upon the Property and to
inspect the Facility Property whenever the City deems necessary. The purpose
of inspection is to follow-up on reported deficiencies and/or to respond to
citizen complaints. The City shall provide the Landowner, its successors and
assigns, copies of the inspection findings and a directive to commence with the
repairs if necessary.
4. In the event the Landowner, its successors and assigns, fails to maintain the
Facility in good working condition acceptable to the City, the City, its
authorized agents and employees, may enter upon the Facility Property and
RETAINING WALL MAINTENANCE AGREEMENT 2
Rev. 03115/2022 BN
take whatever steps necessary to correct deficiencies identified in the
inspection report and to charge the costs of such repairs to the Landowner, its
successors and assigns. It is expressly understood and agreed that the City
is under no obligation to routinely maintain or repair said Facility, and in
no event shall this Agreement be construed to impose any such obligation
on the City, such obligation is Landowner's.
5. The Landowner, its successors and assigns, will perform the work necessary to
keep the Facility in good working order as appropriate. In the event the City
pursuant to this Agreement, performs work of any nature, or expends any funds
in performance of said work for labor, use of equipment, supplies, materials,
and the like, the Landowner, its successors and assigns, shall reimburse the
City upon demand, within thirty (30) days of receipt thereof for all actual costs
incurred by the City hereunder, in the event that Landowner or its successors
or assigns fail to pay the City for the costs incurred under this section, the City
shall impress a lien for the costs of such work upon other lots owned by the
Landowner. Such lien shall be perfected by filing in the office of the County
Clerk of Tarrant County, Texas an affidavit identifying the property to be
charged with such lien, stating the amount thereof, and making reference to
this Agreement.
6. This Agreement imposes no liability of any kind whatsoever on the City. THE
LANDOWNER AGREES TO HOLD THE CITY HARMLESS FROM
ANY LIABILITY IN THE EVENT THE FACILITY FAILS TO
OPERATE PROPERLY. LANDOWNER COVENANT AND AGREE
AND DOES HEREBY INDEMNIFY, HOLD HARMLESS AND DEFEND
THE CITY OF FORT WORTH, ITS AGENTS, SERVANTS AND
EMPLOYEES FROM AND AGAINST ALL COSTS, EXPENSES,
LOSSES, DAMAGES, CLAIMS OR CAUSES OF ACTION
WHATSOEVER ARISING, OR WHICH MIGHT ARISE, FROM THE
FAILURE OF OWNER OR ANY FUTURE OWNERS OF THE ABOVE
FACILITITY PROPERTY TO MAINTAIN THE RETAINING WALL
IN ACCORDANCE HEREWITH, OR AS A RESULT OF ANY
RETAINING WALL MAINTENANCE AGREEMENT
Rev. 03115/2022 BN
DAMAGES CAUSED TO PERSON OR PROPERTY DUE TO (1)
EROSION OF THE SOIL BELOW THE RETAINING WALL AND ITS
FOOTING, AND (2) AND FAILURE OF THE RETAINING WALL
AND ITS FOOTING TO OPERATE IN A MANNER CONSISTENT
WITH CITY OF FORT WORTH CRITERIA TO PERFORM ANY OF
ITS DUTIES OR OBLIGATIONS HEREUNDER.
7. This Agreement shall be recorded among the land records of Tarrant County,
Texas, and shall constitute a covenant running with the land, and shall be
binding on the Landowner, its administrators, executors, assigns, heirs and any
other successors in interests, including any property owners association.
[REMAINDER OF THIS PAGE TO REMAIN BLANK]
RETAINING WALL MAINTENANCE AGREEMENT 4
Rev, 03115/2022 BN
Executed this 13th
CITY OF FORT WORTH
DAna Bu'gk7doff
Dana Burghd off eb 10, 2023 10:54 CST)
Dana Burghdoff
Assistant City Manager
City of Fort Worth
Date: Feb 10, 2023
day of February
Approved as to Form and Legality:
Thomas Royce Hansen,
Assistant City Attorney II
City Attorney's Office
Date: Feb 10, 2023
ATTEST:
Jannette S. Goodall
City Secretary
Date: Feb 10, 2023
2023
LANDOWNER
West FW Automotive Real Estate,
LLC
Jason twx,I
Title: +�
Date: 2 -7 L70 73
Contract Compliance Manager:
By signing, I acknowledge that I am the
person responsible for the monitoring
and administration of this contract,
including ensuring all performance and
reporting requirements.
Rebecca Diane Owen (Feb 10, 202310:30 CST)
Rebecca Owen
Development Manager
Date: Feb 10, 2023
OFFICIAL RECORD
CITY SECRETARY
FT. WORTH, TX
RETAINING WALL MAINTENANCE AGREEMENT
Rev 03/1512022 BN
STATE OF TEXAS §
COUNTY OF TARRANT §
This instrument was acknowledged before me on Feb. 10, 2023 by
Dana Burghdoff, Assistant City Manager of the City of Fort Worth, on behalf of the City
of Fort Worth.
Bichson
Digit' Ilysigned by
BICH SON THI NGUYEN
Notary PublicSTATE
NguyenDate:
Bichson Nguyen
2023.02.10
OF TEXAS
1�9
12:10:43-06'00'
Notary I.D. 133389224My Comm. Exp. Oct. 13, 2025
Notary Public, State of Texas
STATE OF §
COUNTY OFy'� §
r---f
BEFORE ME, the undersigned authority, a Notary Public in and for the State of
_EXA5 , on this day personally appeared Jason Hiley (name),
(title), known to me to be the person
whose name is subscribed to the foregoing instrument, and acknowledged to me that
he/she executed the same for the purposes and consideration therein expressed, as the act
and deed of West FW Automotive Real Estate, LLC (entity), a limited liability company
(entity type) and in the capacity therein stated.
GIVEN UNDER MY HAND AND SEAL OF OFFICE this 560je� _day
ofe,'t 2023.
`,`�,��111 i I I I111rlirfri
p, A Glti�4,�� r
• AY' �Y P& .. Notary 1i ate
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�*':
RETAINING WALL MAIN F-M
Rev. IN '4 WA L �—rr 6
��!ltlillffi����
EXHIBIT "A"
INSERT LEGAL DESCRIPTION
RETAINING WALL MAINTENANCE AGREEMENT
Rev 031,512022BN
EXHIBIT "A"
DRAINAGE EASEMENT
A PART OF THE H. COVINGTON SURVEY, ABSTRACT NO. 256
I
1 BLOCK 3I
LINDA VISTA ESTATES
VOLUME 388—C, PAGE 70
P.R.T.C.T. W 3
SANTA CLARA DRIVE c
(50' WIDTH RIGHT—OF—WAY)
0 100'
PEDESTRIAN ACCESS EASEMENT
INSTRUMENT NUMBER SCALE FEET
0222029665 1"= 100'
P.R.T.C.T.
WEST FW AUTOMOTIVE REAL ESTATE, LLC
C.C.Q. NO. D221021108
D.R.T.C.T.
"PEDESTRIAN ACCESS EASEMENT
INSTRUMENT NUMBER
D222D29665
P.R.T.C.T.
LOT 2,BLOCK 5
WESTERN CROSSROADS
INSTRUMENT NUMBER
L7 Lfi D222029665
P.R.T.C.T.
DN22�20296
P.R.T.C.T.
3u� I
"a
G�0o
S
150
POINT OF
COMMENCING y
BLOCK 9
LINDA
VISTA ESTATES
VOLUME
388—C, PAGE 70
P.R.T.C.T.
I
13 14
I
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00
-L9
L10
J
L3
C.C.D. NO. = COUNTY CLERK'S DOCUMENT NUMBER
L5
DRAINAGE EASEMENT
18.406 SQUARE FEET
0.422 ACRES
1/2" IRON ROD WITH
YELLOW CAP STAMPED
"BEASLEY RPLS 6066" FOUND
LOT 1R, BLOCK 5
WESTERN CROSSROADS
ADDITION
C.C.D.
NO. D217169366
P.R.T.C.T.
D.R.T.C.T. = DEED RECORDS, TARRANT COUNTY, TEXAS
P.R.T.C.T. = PLAT RECORDS, TARRANT COUNTY, TEXAS
A metes and bounds description of A%r
even date accompanies this drawing. A`
DATE: APRIL 28, 2022
ouI►wAy
550 Bailey Avenue • Suite 400 " turf worth, Texas 76107
Tea: 817.335.1121
TEXAS REGISTERED SURVEYING FIRM NO. 10098100
5�4V 6
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Line Table
Line
Number
Bearing
Distance
Ll
N89'25'05'E
8.45'
L2
S00'34'52"E
102.15'
L3
EAST
70.94'
L4
NOO'Y8'09"W
231.96'
L5
N89'44'14'E
10.44'
L6
NORTH
18.00'
L7
WEST
82.01'
LS
S0o34'52"E
97.86'
L9
S89125'0B'W
8,45'
L10
S0034'52'E
50.00'
�P� G`gTfRF-f'�
STEPHEN R. GLOSUP
�P� �
9y F4sskl yo
SURVl
04/28/2022
PAGE 1 OF 2
DUNAWAY JOB NO. B006906.001
EXHIBI T "A"
DRAINAGE EASEMENT
A PART OF THE H. COVINGTON SURVEY, ABSTRACT NO. 256
PROPERTY DESCRIPTION
BEING a tract of land situated in the H. Covington Survey, Abstract Number 256, in the City of Fort Worth,
Tarrant County, Texas, being a portion of Lot 2, Block 5, Western Crossroads, an Addition to the City of Fort
Worth, according to the plat recorded in County Clerk's Document Number D222029665, Plat Records, Tarrant
County, Texas, and being a portion of that certain tract of land described by deed to West FW Automotive
Real Estate, LLC, recorded in County Clerk's Document Number D221021108, Deed Records, Tarrant County,
Texas, said tract of land being more particularly described by metes and bounds as follows:
COMMENCING at a 1/2" iron rod with yellow cap stamped "BEASLEY RPLS 6066" found for the southwest
corner of said Lot 2, Block 5, Western Crossroads and in the east right—of—way line of said Alemeda Street,
(variable width right—of—way);
North 00'34'52" West, with the common line of said Lot 2, Block 5, Western Crossroads, and with east
right—of—way line of said Alemeda Street, a distance of 208.54 to a point for the POINT OF BEGINNING of
herein described tract;
THENCE deporting the said common line and crossing into said Lot 2, Block 5, Western Crossroads the
following courses and distances:
North 89'25'08" East, a distance of 8.45 feet to a point;
South 00'34'52" East, a distance of 102.15 feet to a point;
EAST, a distance of 70.94 feet to a point;
North 00'28'09" West, a distance of 231.96 feet to a point;
North 89'44'14" East, a distance of 10.44 feet to a point;
NORTH, a distance of 18.00 feet to a point;
WEST, a distance of 82.01 feet to a point;
South 00'34'52" East, a distance of 97.86 feet to a point;
South 89'25'08" West, a distance of 8.45 feet to a point in the common line of said Lot 2, Block 5,
Western Crossroads, and east right—of—way line of said Alemeda Street;
THENCE South 0034'52" East, with the common line of said Lot 2, Block 5, Western Crossroads, and east
right—of—way line of said Alemeda Street, a distance of 50.00 feet to the POINT OF BEGINNING and
containing a calculated area of 18,406 square feet or 0.422 acres of land.
NOTES: The basis of bearings for this Easement is the Texas Coordinate System of 1983, North Central Zone, 4202.
based upon GPS measurements, according to the GPS Reference Network.
A drawing of even date accompanies this metes and bounds description.
The metes and bounds description contained herein was compiled from information contained in recorded
documents and does not reflect the results of an on the ground survey.
DUNAWAY JOB NO. B006906.001 PAGE 2 OF 2
Registered Professional Land Surveyor
Texas Registration No. 5570
srg(5!dunaway.com
April 28, 2022
iw-
WNAWA
v
550 Baley Avenue • Suite 400 • fort Worth, Texas 76107
Tel:817.335.1121
TEXAS REGISTERED SURVEYING FIRM NO. 10098100
S T
a01 �� Fp s
STEPHEN R. GLOSUP
9 °�0 5570o�P1.4 o
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S��vE,
EXHIBIT "A"
r : - LVW*W- j4M140 11
A PART OF THE H. COVINGTON SURVEY,
ABSTRACT NO. 256
City of Fat Worth, Tarrant County, Texas.
EXHIBIT "B"
DESIGN PLANS
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BASIC
INSTALLATION
This section will take you through the step-by-step process of installing your retaining wall.
Covered in this section is a basic gravity wall installation and also installation procedures for
geogrid reinforced walls. While this section may not cover every construction issue you may
encounter on your project, it gives a basic overview and helpful hints for the installation of a
Keystone retaining wall.
Tools and materials that will be required:
■ 12-inch, 48-inch, 72-inch levels
• Tape measure
• Shovel
• Excavating equipment
• Personal protective equipment (PPE)
• S-lb dead blow hammer
• Heavy hammer and masonry cold chisel
• Stringline
• Compaction equipment (determined by size and scope of wall)
• Concrete saw
• Block splitter
• Keystone structural units and caps
• Structural geogrid, if required
• Unit drainage fill
• Backfill material
• Leveling pad material
• Exterior grade concrete adhesive
• Geotextile fabric
• 4-inch drainage pipe
BroadStone• 1 9
Installation: Step -by -Step
1. Site Examination / Permitting
Select the location and length for the retaining wall. Call before you
dig! In the United States, calling 811 before every digging job gets
your underground utility lines marked for free and helps prevent
undesired consequences. Digging without calling can disrupt
service to an entire neighborhood, harm you and those around you
and potentially result in fines and repair costs. Take the necessary
measurements, prepare plans, research zoning requirements for
your area and obtain proper building permits for your project. Local
permitting may require a soils investigation and/or engineered
documentation and drawings.
00 Krn Itltlaty belkim
b e Call before qoa die,
2. Excavation / Embedment
Verify that the layout dimensions are correct and excavate to the
lines and grades shown on the construction drawings or to field
dimensions. Remove all surface vegetation, organic soils and debris,
and verify that the foundation subgrade is in proper condition
prior to leveling pad installation. Do not proceed with installation
until soft soils or any other unsatisfactory conditions have been
corrected
Embedment Recommendations
For small Keystone gravity walls, a minimum of 6--inches
embedment !s required.
For reinforced soil Keystone walls, the minimum depth of
embedment as a ratio to wall height may be determined 'n the
provided table (page 11).
The information contained he,em has been comphd by Keystone Retaining War Systems- LLC and to the best of ow kosdedge,—ratety represents the Keystone product used w the applcatwns whin+ are:ustraled.
Fnal determination of the suitability for the use contemp6ted and U manner,( — are the sole respenvb+ty of the user Des gn and analysis thal be performed by a quabloed engmeer
10 1 Keystone Construction Manual
Installation: Step -by -Step
A:1 - ELEVATION
Sloping Grade 8" Keystone Block Units
6" or 1 Unit Minimum
Below Grade
Embedment Depth
1� Yt i. i•t•%tl" 1, r.
`,;AT•1' er•+ .!'yti+L. �«t`.�,•�'a. �'i'J! ,�::fi. p1
i 4lw� I 7-7
;u �° •'^ itis' ..14 t�i� s; � ;y! �� s" uT .y�,� �f—I 11= — =1 11=
l—I I! {
• i �h L yr' Uf., . R�j trt'.
. a; •�r'�''
.e•• i, :i. �•�?:+: j. AJ." I II III=111—•
I f f1717
Excavation Limits--=
Pad
6" —g
9' t 8" Step (Typ.)
Elevation
MOTES:
Project plans, specifications, and design codes may require minimum embedments that exceed the minimums shown here.
■ The requ'red embedment depth for Keystone walls may become a controversial issue. The International Building Code (IBC)
recommends a 1-foot minimum or below preva'ling frost depth, whichever is greater for foundations AASHTO recommends a
2-foot minimum or below prevailing frost depth, whichever is greater for retaining structures. These m nimum recommended depths
are based on rigid foundation systems and are not totally applicable to SRWs, which can function properly w-th sign ficantly less
embedment. The proper embedment depth is a function of the structure size and type, the underlying soils, and the site geometry,
especially toe slopes. It is important to properly inspect the foundation area when excavated, determine the limits of removal and
replacement of unsuitable materials, and then confirm the final embedment depth for stability and bearing given the site conditions.
Sloping Toe
The minimum embedment required with a 3:1 or steeper slope
in front of the wall should be based on the establishment of
a minimum 4-foot horizontal bench in front of the wall and
establishing a minimum embedment from that point. Fill slopes
usually have poor compaction near the edge of slope, and all
slopes are subject to erosion and superficial instability (see Figure
A:2, right).
The depth of embedment should be increased when any of the
following conditions occur:
• Weak bearing soils
• Potential scour of wall toe
• Submerged wall applications
• Significant shrink/swell/frost properties of foundation soils
• Global stability concerns
Slope in front of wall
Minimum requirement
Minimum embedment
0.5'
Horizontal (walls)
H/20
Horizontal (abutments)
H/10
3H:1V
H/10 + 1.33'
2H:1V
H/10 + 2'
A:2 - EMBEDMENT CROSS SECTION
Height, H 4' th4poi
(afsave grade) a_ _ _ _ _
Isiggn Geosynthet c
-iglu — — reinforcement
_ — I
JEALM�
Bench —r\Levelin ad
Embedment g P
The iofor.nat,on contained herein has been compiled by Keystone R*mning Wal Systems• LLC and to the beet of our knowledge. accurately represents the Keystone product used in the applications which ere iustratad,
Final dmermirmaon of the w.btty for the use contemplated and ins manner of use are the sole responsibil�ry of the user Des gin and anatysis shag be performed by a qualified engineer.
BroadStone• 1 11
Installation: Step -by -Step
3. Prepare the Base Leveling Pad
Start the leveling pad at the lowest elevation along the wall
alignment (see Figure A:3, below). The minimum leveling pad
width shall be unit depth plus 12 inches. The leveling pad shall
be level front -to -back and side -to -side and consist of 6 inches
of well -compacted (95% standard proctor or greater) angular
granularfll (road base or'/z-inch to Winch crushed stone). Lean
unreinforced concrete (2,000 psi minimum) is also acceptable to
use as a leveling pad. Step the leveling pad up in 8-inch increments
at the appropriate elevation change in the foundation. Do not
use rounded material (i.e. PEA GRAVEL or SAND) for leveling pad
material.
A:3 - BASE LEVELING PAD
6" D
6' Leveling Pad Front Face
u
F�ccavallon Limits D + 12'�
NOTES:
• Construct leveling pad with crushed stone or 2,000 psi
unreinforced concrete.
6 The leveling pad foundation is to be approved by the site
geotechnical engineer pnor to leveling pad placement.
• Set the location lug into the granular leveling pad or remove
lug.
She information contained heroin has been cornpJed by Keystone, Retaining Well Systems' LLC and to the best of our knoxAedge, accurately represents the Keystone product used in the apphcationa which are dusnated.
Final determ-nation of the suiulbky for the use contemplated and its manner of use are the sole resporgib'lity of the user DesJgn and analysis shall be performed by a qudilied engineer.
12 1 Keystone Construction Manual
Installation: Step -by -Step
4. Install the Base Course
The first step is to set the integral shear lug into the granular
leveling pad or alternatively remove the integral shear lug with
a heavy hammer and chisel so that the units can lie flat on the
leveling pad. Place the first course of Keystone units end -to -end,
with face of wall corners touching (do not leave gaps between units)
on the prepared base. Ensure that all units are in full contact with
the base and properly seated by gently tapping each block corner
with the dead blow hammer as required. Level the first course
front -to -back, side -to -side, and unit -to -unit down the length of the
wall. At base elevation changes, maintain a minimum embedment
at step-up locations. A level base course is critical for accurate and
acceptable results. {See Figure AA below.) Lay out corners and
curves in accordance with the "Corners and Curves" section of th s
manual (page 29).
AA - LEVELING PAD
Level Units Side to Side
.t.
•`1tlt,l
Level Units Front to Back
The informat,on contained herein has been compled by Keystone R"W nq wag Systems' LLC and to the best of our knowledger accoruely represents the Keystone ptodod used n the applicatie-s wh ch are aurrated
Final determination of the sullabl.ty for the use contemplated and its manner of use are the sde respons,bGty of the user Design and analysis shal be performed by a qualdred eng+veer
BroadStone" 13
Installation: Step -by -Step
5. Install Unit Drainage Fill, Drainage Pipe, Backfili
and Compaction
Install drainage p pe behind wall unit and outlet drain to storm
system or daylight. See drainage section for additional details
(page 50). Once the units have been installed, fill all open spaces
between units and open cavities/cores with %2 to is -inch clean
crushed stone unit drainage material to a minimum total distance
of 24-inches from wall face. Place the wall backfill behind the
unit drainage fill 'n maximum 8-inch lifts and compact to 95%
standard proctor density or 92% modified proctor density with
the appropriate compaction equipment. Use only hand -operated
equipment within 3-feet of the retaining wall face.
A;5 - DRAINAGE PIPE DETAIL
r Finished Grade
Reinforced Soil--
• '• t • ' ' ' • III-1 I I-1 I I-1 I I-1 I = — —
i•I Embedment
I I-111-1 I� I 1=j 11=1 I ��"'� ` �'�'" '•h ' _I � I —I � I —III —III —I 11-1 11= I I 1=t
4' Perforated Drainage Pipe. 6' 6' Leveling Pad
Geotextile Filter Fabric. (Crushed Stone or
Outlet to Daylight or Unreinforced Concrete)
Storm Drain 24"
Foundation Soil
NOTE:
• Drainage pipe should maintain positive drainage to daylight; outlet the drainpipe at low points every 30 to 50-feet on center at ends
of wall, if appropriate. Alternatively, a raised drain may be utilized per the detail on page 51 of this manual.
The information cc~ed herein has been compiled by Keystone Re timutg Wall Systems- LLC end to the best of our kno%iedge, accurately represents the Keystone product used in the apdiwions which are Httsvated.
final determinauort of the sudabJ�ry for the use contemplated and its manner of ese ate the sole resp,m,W.ry of the user, fhs-gn and enelyais shell be performed by a quarfied engineer
14 1 Keystone Construction Manual
Installation: Step -by -Step
6. Install Additional Courses
Remove all excess unit drainage material from the top surface of
all the units. Center the next course unit at the point where the
two units below meet, centering the integral shear lug directly
above indents of the two lower units. Push the unit forward until
the lugs make contact with the edge of the lower unit's indents at
the back face of the units. (See Figure A:6, below) The integral
shear lugs provide for an automatic setback of 1/4a per course or
approximately 1.8 degree batter. (See Figure A:6, below.) Check
level front -to -back and side -to -side, shim the units or grind as
necessary. It :s important to check level front -to -back and side -to -
side on every course to maintain proper wall batter and alignment.
Proper sh'mm'ng materials can be any non -degradable material,
including but not limited to, asphalt shingles, scrap pieces of
geogrid, etc. Shimming of block is not allowed on courses with
geogrid reinforcement.
Continue backfilling, installing additional units and checking level
to the desired top elevation. Follow wall unit and unit drainage fill
installation closely with backfill. Maximum stacked vertical height
of wall un'ts pr or to unit drainage fill, backfill placement and
compaction shall not exceed 2 courses, unless special construction
techniques are employed to ensure complete filling of all units with
unit drainage fll.
For gravity walls, continue this construction sequence to complete
the wall and proceed to Step 9. For geogrid reinforced walls,
continue with Step 7 and Step 8.
A:6 - BLOCK LUG CONNECTION DETAIL
ter Upper Block on Top of Lower
ks and Slide Unit Forward So
3ottom Front Lugs of the Upper Block
facts the Front of the Blocks Lug
nnel Below
:k Lug Channel Front
Bottom Front Lugs of Block Unit -
that Seats ! Contacts the Front
of the Blocks Lug Channel Below
Center Upper Block on Top of Lower
Blocks and Slide Unit Forward So
the Front Lug of the Upper Block
Contacts the Back of the Blocks
Lug Channel Below
1 /4" t
Setback
The nformahon contsined herein has been complied by Keystone Retaining Wal Systems• LLC and to the best of our knowledge, accurately represeiu the Keystone product used on the appl—lions wh,ch are ilustrated.
Final determmahon of the suaab,hty for the use contemplated and its manner of use are the sda responsib4ty of the user bes,gn and anaysls shar be performed by a qual,Led engineer.
BroadStone• 1 15
Installation: Step -by -Step
7. Structural Geogrid Installation
Start at the lowest wall elevation where a geogrid layer will be
placed. The geogrid elevations, depths, and strength will be
specified in the engineered design for the wall. Measure and cut
the geogrid material to the specified length. Orient geogrid with
highest strength axis perpendicular to the wall alignment. Lay
geogrid horizontally on compacted backfill within 1-inch of the face
of the lower block (see Figure A:7, below). Ensure that the core fill
and un't drainage fill is flush with the top of the lower unit prior to
geogrid placement.
Geognd will be placed in pieces side -by -side (100% coverage)
w th no gapping or overlapping in a continuous layer along the
length of design geogrid elevation, unless a change in elevation is
specified in the design. Install next course of units over the geogrid
to secure in place. Tension the geogrid by pulling it towards the
embankment, Place a stake through the end of the geogrid into the
ground or place fill over the back edge of geogrid to hold it taut
and in place. Do not excessively tension geogrid; this may pull units
out of proper alignment.
NOTES:
• Geogrid is to be placed on level backfill and extended within 1-inch of the front face of the block unit. Place next unit. Pull grid taut
and backfill. Stake as required.
• The roll direction is the strength direction of the geogrid. Geogrid is rolled out perpendicular to wall face.
The mfomation contained Mrein has been compled by Keystone Retaining Wal Systems* LLC and to the best of ow knowledge, accurately represents the Keystone product used in the applications which ere Jmtrated.
Final determination of the suitabbry fw the use contemplated and iu manna al use are the a.1 s,, n,ibibty tithe user Des gn and analysis shal be performed by a quabf ed engineer.
16 Keystone Construction Manual
Installation: Step -by -Step
8. Reinforced Backfill Placement
Proceed w th placement of the unit drainage fill and the backfill in
the reinforced zone. Specifications for the material to be used as
backfill in the reinforced zone should be defined in the engineered
plans. Place this material nearest to the units, moving progressively
toward the staked end of the geogrid. This procedure will keep the
geogrid under tension. Compact the reinforced and drainage fill
material to a m nimum 95% standard proctor dens ty (ASTM D698)
or 92% modified proctor density (ASTM D1557). Or see compaction
requirements stated in the engineered plans. Install additional
courses as described in Step 6, until the next reinforcement
elevation Repeat Steps 7 and B.
Only hand -operated compaction equipment can be allowed w thin
3-feet of the back surface of the units. At the end of each day's
operation, grade the backfill away from the wall and direct runoff
away from the wall face.
9. Capping the Wall
Complete your wall with the appropriate Keystone capping units.
These units are available in a variety of sizes and shapes. Availab lity
of these units will vary by region. For cap unit descriptions and
placement variations see the section, "Wall Finish ng" (page 41)
of this manual. Sweep the lower units clean and make sure they are
dry. Use exterior grade concrete adhesive on the top surface of the
last course before applying cap units (see Figure A:8, below).
A:8 - SECURE THE CAPS
Place Cap Unit on
Exterior Grade
' ' I Concrete Adhesive
i I and Stagger Cap
I I Unit Over Block
I I Units Below
Exterior Grade
Concrete Adhesive
'M
The information contained herein has been compdod by Keystone Retaining Wag Systems• ktC and to" best of our knowledge. accurately represents the Keystone product used in the applications which are iutuated,
Final determimtron of he suublity Fa the use contemplated and its manner A use are the sde respo—b.lay of the user Deagn and a I sh sh.1 be performed by a qua6Ged eng,neer
BroadStone" 1 17
Installation: Step -by -Step
10. Finished Grade and Landscaping
The Keystone retain'ng wall is now complete. Final grading,
planting or other surface material can now be put into place.
Typically an 8-inch thick layer of low permeable soil is installed as
the final layer of material. This is to help prevent water infiltration to
the retained or reinforced zone of the retaining wall. Remember that
finished grade conditions affect the wall's performance. Fill placed
behind the wall should be graded to flush with the top back of the
cap unit. Such conditions should not be altered from the original
design.
Loadings that include slopes, parking lots and buildings should be
maintained as designed. Any changes to the top -of -wall finished
grade must be evaluated prior to wall completion (see Figures
A:9-A:10, page 19).
The infemulion contained herein has been y rnpiad by "we Retalmng War 5ystemsa LLC and to the best of our knowledge, accurately represents the Keystone produo used in the appbwt ons which are -rmtreted.
F.nal delerrnteatw of the suitability for the , . contemplated and ns manner of we are the We responsibdny of the user Q*Ni n and analfsis she$ W pedamed by a qual.hed engineer
19 1 keystone Construction Manual
Installation: Step -by -Step
A:9 - GRAVITY WALL
Finished Grade
8" Low Permeable Soil �
Filter Fabric -
(if Required)
Approximate I
of Excavation
Retained Soil
Keystone Cap Unit
Keystone Block Unit
24' (Min.) Unit Drainage Fill Depth
(314" Crushed Rock or Stone) Total Wall
Height
r r Embedment Finished
} / Grade
4" Perforated Drainage Pipe. 6" 6" Leveling Pad
Geotextile Filter Fabric. (Crushed Stone or
Outlet to Daylight or 24. Unreinforced Concrete)
Storm Drain
Foundation Soil
NOTES:
• Drain should be at bottom of wall when possible. Utilize raised drain location when bottom of wall drainage is not possible.
• See Drainage Section (page 50) for additional details.
A:10 - REINFORCED WALL
Approximate Limits
of Excavation
Retained Soil
B" Low Permeable Sell
4" Perforated Drainage Pipe
Geotextile Filter Fabric.
Outlet to Daylight or
Storm Drain
6'
24'
Foundation Soil
Keystone Cap Unit
Keystone Block Unit
Total Wall
Height
24' Unit Drainage FIII Depth
(314" Crushed Rock or Stone)
r Finished Grade
6" Leveling Pad
(Crushed Stone or
Unreinforced Concrete)
Embedment
the mformation contained herein has been compiled by Keystone Retaining Wa/ Systarnje t i C and to the bast of our knowledge, acw rat* represents the Keystone product used m the appi+cations which are mutuated.
Final determination of the suitab,hty for the use wntemplaled and its man-er of me are the sole responsibllity of the user Design and anahysis shalt be prdosmed bye quali F,ed engineer
BroadStone" I 19
Exhibit "C"
CITY OF FORT WORTH STORMWATER FACILITY
OPERATION AND MAINTENANCE PLAN
The only responsibility the City of Fort Worth has in the operation and maintenance of
this Facility is inspection.
General Maintenance Procedures
The structural and functional integrity of the Facility shall be maintained at all times by
removing and preventing drainage interference, obstructions, blockages, or other adverse
effects into, through, or out of the system.
Periodic silt removal shall occur when standing water conditions occur or the pond's
storage volume is reduced by more than 10%. Silt shall be removed and the pond/basin
returned to original lines and grades shown on the approved engineering plans. In
addition, corrective measures are required any time a basin does not drain completely
within 72 hours of cessation of inflow. NO STANDING WATER IS ALLOWED in
basins designed for dry detention purposes.
Accumulated litter, sediment, and debris shall be removed every 6 months or as necessary
to maintain proper operation of the basin. Disposal shall be in accordance with federal,
state and local regulations.
Detention facilities shall be mowed monthly between the months of April and October or
anytime vegetation exceeds 12-inches in height.
To prevent debris from entering and clogging the downstream storm sewer system a wire
mesh screen or similar screening device shall be installed over the outlet until final
acceptance.
4. PREVENTIVE MAINTENANCE/INSPECTION
• Visual inspections of all components will be conducted every 6 months.
• A log shall be kept of maintenance actions, and inspections. The log should
document the condition of the detention system's primary components, mowing,
and silt, litter and debris removal dates. Document aeration of the basin bottoms
and replanting to prevent the sealing of the basin bottom.
• Written maintenance and repair records shall be maintained by the party or
parties signing the attached Agreement and shall be provided to the City upon
request.
STORMWATER FACILITY MAINTENANCE AGREEMENT
Rev. 11/1712016
Segmental Retaining Wall Care, Operations and Maintenance Guide
The Segmental Retaining Wall (SRW) is constructed of concrete masonry units, geogrid soil reinforcement fabric,
and compacted backfill. The structure's performance is sensitive to any post -construction activities that may damage
components, increase loading conditions, and/or reduce overall stability. The following list is intended to provide
guidelines for the proper care of an SRW.
1. The area behind the wall that contains geogrid soil reinforcement (reinforced zone) is the primary structural
component of the wall system. Do not, under any circumstances, excavate through, drill through, or otherwise
damage this reinforcement fabric without written approval of the design engineer of record.
2. The drain line at the base of the wall (if required and installed) should be stubbed out to daylight or for final
connection to storm drainage systems by others. Insure that all connections are made to proper drain outlets and
that any drain outlets to daylight are not buried.
3. The Keystone wall is normally constructed over a crushed stone base. No digging or excavation shall be done
within 3 feet (0.9m) horizontally from bottom face of wall or to such depth that would compromise the integrity
of the wall foundation.
4, All water must be diverted away from the base of wall to avoid erosion and undermining of the foundation after
installation. This includes temporary site grading during construction and final site grading.
5. Landscape watering and surface drainage above the wall should be designed in consultation with the civil and
geotechnical engineer and performed in such a way as to avoid standing water, water cascading over the wall, and
infiltration (saturation) of the reinforced zone.
6. Do not increase the height of the existing wall as constructed with more block units without the written approval
of the design engineer of record.
7. Do not add a slope or increase the steepness of a back slope beyond what was considered in the original grading
plan and wall design without written approval of the design engineer of record.
8. Do not add additional surcharges within a lateral distance of twice the overall height of the structure(s) without
written approval of the design engineer of record or unless considered in the original wall design. This would
include fences, sound walls, landscaping walls, swimming pools, buildings, garages, etc.
9. Do not operate heavy equipment within four feet of top of wall face. The surcharge from equipment weight can
push the upper wall units out resulting in misalignment.
10. Segmental retaining walls are flexible structures (vs. rigid as in CMU walls) and may experience some post -
construction movement. All structures (i.e. sidewalks, pavements, curbs, trash enclosures, utility lines, etc.)
should be designed to handle some ground movement and not be connected directly to the wall units.
11. The retaining walls should be periodically inspected to verify that drainage measures are functioning properly,
and that erosion has not occurred along the top, ends, or bottom of the wall. Any unanticipated movement or
deflection of the wall system should be noted and evaluated by a qualified engineer.
12. Over time the wall face may begin to show a white flaky material and may especially be noticeable post -
construction. This material is called efflorescence. Efflorescence occurs when moisture evaporates from the
wall face, and the naturally occurring soluble salts and bases, or the calcium carbonate (calcium hydroxide in the
cement mixes with carbon dioxide in the air) is left on the face. This efflorescence is only an aesthetic concern
and will not affect the structural performance of the wall. Ffflorescence can typically be removed by dry brushing
followed by flushing with clean water. In tougher cases power washing with clean water mixed with muriatic acid
solution will also aid in the removal of efflorescence.
ww w.keys tone waIts. coin 87
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