HomeMy WebLinkAboutContract 48278 CITY SECRETARY
CONTRACT Noe �g
2
DOE #
STORM WATER DETENTION
FACILITY AGREEMENT
THIS AGREEMENT, made and entered into this day of
�01V , by and between Chisholm Trail ASC Partners LLC, and Harris Parkway
Condominium Owners Association, 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
being a portion of_Lot 2, Block 1, Chisholm Trail Hospital Addition, Fort Worth, Tarrant
County, Texas, as recorded in, Instrument No. D215108520, Plat 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 Chisholm Trail MOB 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 management of storm water within the confines
of the Property; 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 on-site Storm Water Management Facilities be constructed and maintained on a
portion of the Property; and
WHEREAS, the City requires that on-site Storm Water Management Facilities
("Facility") as shown on the Plan be constructed and adequately maintained by the
STORM WATER DETENTION FACILITY AGREEMENT OFFICIAL RECOFD
Rev.09/10/2012 CIVY
!I Y SECRETA H Lr
FV. WORTH, TX
Landowner, its successors and assigns, the location and dimensions of which is shown and
more particularly described by metes and bounds in 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 Storm Water Management 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 and with the Operations and Maintenance
Plan attached to this Agreement as Exhibit "C". The Storm Water Facility
includes all pipes, channels or other conveyances built to convey storm water
to the facility, as well as all structures, improvements, and vegetation provided
to control the quantity and quality of the storm water. Adequate maintenance
is herein defined as good working condition so that these facilities are
performing their design functions. The Storm Water Structural Control
Maintenance Checklists, attached to this Agreement as Exhibit "D", are to be
used to establish what good working condition is acceptable to the City.
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, berms, outlet structure, pond areas, access roads, etc.
Components of the Facility, which need 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
STORM WATER DETENTION FACILITY AGREEMENT 2
Rev.09/10/2012
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 as specified herein, the City, its authorized
agents and employees, may enter upon the Facility Property and 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
STORM WATER DETENTION FACILITY AGREEMENT 3
Rev.09/10/2012
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 LANDOWNER OR ANY FUTURE OWNERS OF THE
ABOVE FACILITITY PROPERTY TO MAINTAIN THE FACILITY,
INCLUDING, BUT NOT LIMITED TO THE BED AND BANKS OF
THE DETENTION POND; ANY DAMAGES CAUSED TO PERSON OR
PROPERTY DUE TO (1) FLOODING OF THE POND AND ITS
BANKS, (2) SLOPE FAILURE OF THE BANKS OF THE POND, OR (3)
FAILURE OF THE POND OR ITS BANKS TO OPERATE IN A
MANNER CONSISTENT WITH CITY OF FORT WORTH CRITERIA
TO PERFORM ANY OTHER DUTIES OR OBLIGATIONS
HEREUNDER.
7. Landowner covenants and agrees that no habitable building shall be erected
within the drainage easement outlined on Exhibit "A" but this paragraph shall
not preclude construction of other improvements within the drainage easement,
which do not impede drainage. Landowner covenants and agrees that no
habitable building shall be erected on the above property abutting such
easement which shall have a finished floor at an elevation less than two feet
above the maximum depth of water in the detention pond which would occur
during a 100 year frequency flood.
8. This Agreement shall be recorded among the land records of Tarrant County,
Texas, 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.
[SIGNATURE PAGE FOLLOWS]
STORM WATER DETENTION FACILITY AGREEMENT 4
Rev.09/10/2012
Executed this day of b �P1/20
Landowner Chisholm Trail ASC Harris Parkway Condominium Owners
Partnership LLC Association
A Texas corporation A condominium declaration
By: Chisholm Trail ASC By: Harris Parkway Condominium
a Texas Corporation Owners Association
its General Partner A condominium declaration
By: ��—` By:./�
City of Fort Worth
Jesus J.Chapa
Assistant City Manager
Approved as to Form and Legality
a
AAsistant City Attorney,Leann ((Zt t0.t�
ATTEST
City Secretary
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STORM WATER DETENTION FACILITY AGREEMENT C8Vy S dRE-COND Rev.09/10/2012 � `
STATE OF TEXAS §
COUNTY OF TARRANT §
This instrument was acknowledged before me on O C+ N) (� (�� by
Jesus J. Chapa, Assistant City Manager of the City of Fort Worth, on behalf of the City of
Fort Worth.
LINDA M. HIRRLINGER
Notary Public,State of Texas
Comm.Expires 02-02-2018
Notary ID 12414474-6 Notary Public, State of Texas
STATE OF TEXAS § r "
�\SPY P�'i JESSE GOBER
%
°
�? Notary Public,State of Texas
COUNTY OF TARRANT § ! T'••le My Commission Expires
L7'' t'
"I11October 20, 2018
E tE\�
�111\\\\�
Before e, the undersigned aut or ty on tis 71 _ day of
S 20 , personally appeared
W
known
to me to be the person whose name is subscribed to the foregoing instrument and
acknowledged to me that II the same is the act of
and that he/executed the same as its
and as the act of such and for the purposes and
consideration expressed in the foregoing instrument.
14 L
Notary Publ' , State of Texas
STATE OF TEXAS § ;��aY'P "" JESSE GOBER
gl
S Notary Public,State of Texas
COUNTY OF TARRANT My Commission Expires
§ "';E�;��;:�� October 20, 2018
Be ore m , the undersigned authority on this day of
S
206 personally appeared
known
to me to be the person whose name is subscribed to the foregoing instrument and
acknowledged t me that the same is the act of
W "0� Svc,l��v— , and that he executed the same as its
and as the act of suchvt� a for the purposes and
consideration expressed in the foregoing instrument.
Notary Publ'c, Std e of Texas
STORM WATER DETENTION FACILITY AGREEMENT 6
Rev.09/10/2012
EXHIBIT "A"
INSERT LEGAL DESCRIPTION
STORM WATER DETENTION FACILITY AGREEMENT 7
Rev.09/10/2012
EXHIBIT A
STORM WATER DETENTION FACILITY
LOT 2, BLOCK 1, CHISHOLM TRAIL HOSPITAL ADDITION
JOHN F. HEATH SURVEY, ABSTRACT NO. 641
FORT WORTH, TEXAS
(PAGE 1 OF 2)
BEING a tract of land situated in Lot 2, Block 1, Chisholm Trail Hospital Addition, an addition the City of Fort Worth according to the
plat thereof recorded in County Clerk's Instrument No. D215108520, Official Public Records,Tarrant County,Texas(OPRTCT),and
being more particularly described by metes and bounds as follows:
COMMENCING at a 5/8 inch capped iron rod marked"GORRONDONA"found at the southeast corner of said Lot 1, being in the
west right-of-way line of Harris Parkway, and being at the northeast corner of that certain tract of land conveyed to Agape Baptist
Church of Fort Worth according to the deed recorded in County Clerk's Instrument No. D211155513, OPRTCT;
THENCE North 88°07'46"West,with the common line between said Lot 1 and said Agape Baptist Church Tract,a distance of
307.81 feet to the POINT OF BEGINNING of the herein described tract;
THENCE North 88°07'46"West, continuing with the said common line, a distance of 108.01 feet to a 5/8 inch capped iron rod
marked"GORRONDONA"found at the southwest corner of said Lot 1;
THENCE North 01'56'10" East, continuing with the said common line, passing the most northerly northeast corner of said Agape
Baptist Church Tract, being common with the southeast corner of Lot 2, Block 8, Quail Ridge Estates, an addition to the City of Fort
Worth according to the plat thereof recorded in Cabinet B, Slide 914, Plat Records, Tarrant County, Texas(PRTCT),at a distance
of 136.68 feet, and continuing with the common line between said Lot 1 and said Lot 2, for a total distance of 138.19 feet to a point
for corner;
THENCE over and across said Lot 1 the following calls:
South 88°03'50"East, a distance of 28.91 feet to a point for corner;
South 30°47'15" East, a distance of 146.29 feet to a point for corner;
South 01°52'14"West, a distance of 15.00 feet to the POINT OF BEGINNING and containing 10,051 square feet or 0.231
acres of land, more or less.
'<P�E OFCb .TF-I'
''• \S1 E y
....:................................
�� JOSHUA D. WARGO
J shua D. Wargo 08/25/2016
....%................................
6391
Registered Professional Land Surveyor No.639110
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l9 •°FEss\o�' OQ-
�oSUR\J�
Basis of Bearing being State Plane Grid-Texas North Central Zone (4202) NAD83-as established using GPS Technology in
conjunction with the Texas RTK Cooperative Network.
SMBBAIRD, HAMPTON & GROWN, INC.
ENGINEERING & SURVEYING
4550 State Hwy 360, Ste. 180, Grapevine, TX 76051
jwargo®bhbinc.com 817-251-8550 www.bhbinc.com
BHB Project /2016.703.000 TBPE Firm F-44 TBPLS Firm 10011302
DRAWING FILE: E:\Surveyl6\703\000 Chisholm Trail Addition 2nd MOB\Dwg\Storm Water Detention.dwg I Page 1
EXHIBIT B
STORM WATER DETENTION FACILITY
LOT 2, BLOCK 1, CHISHOLM TRAIL HOSPITAL ADDITION
j I I JOHN F. HEATH SURVEY, ABSTRACT NO. 641 N
III I FORT WORTH, TEXAS
m i l i i
� a� (PAGE 2 OF 2)
W*
=oo E
N
o awi � v I I
DO om� I I I Number Bearing Distance
o a I L1 S 88003'50"E 28.91' g
J U L2 S 01052'14"W 15.00' 0 50'
I I
I I I SCALE: 1" = 50'
7.5'Utility Easement I �--I—II 20'Sanitary Sewer
Cabinet B,Slide 914 I I I CC#D215108520
- — PRTCT I I I OPRTCT
J L11
— — 1/2"IRF
N 78°10'29"E
0.4 1'
N co
< '
�oa Lot 2, Block 1 17�
M I �� Chisholm Trail Hospital Addition m
NLhF� W �tS, CC# D215108520 I N
WI� o CIPRTCT 3
O I� CO Storm Water Q
c I LO Detention Facility =r Es
in ti v �/ 10,051 Sq Ft &
O o
Z/ 0.231 Acres
7.5'Utility Easement
CC#D215108520
OPRTCT POC
5/8'CIRF marked (V — — r
"GORRONDON� —A" A' 88007'46" W 108.01— J — N 88;07�46" W 307.81'
V — — — — _ — — — _ 5/8"CIRF marked
OB "GORRONDONA"
Agape Baptist Church of Fort Worth
CC#D211155513 7.5'Utility Easement
OPRTCT CC#D211155513
OPRTCT i
Basis of Bearing being State Plane
Grid-Texas North Central Zone
(4202) NAD83-as established using
GPS Technology in conjunction with OF 7-
the
the Texas RTK Cooperative Network.
JOSHUA D.WARGO
J shua D. Wargo 08/25/2016 A
6391
g � '•.%FESS10�p'•Q'
Registered Professional Land Surveyor No. 6391 Stip SURv'O
OMBBAIRD, HAMPTON & BROWN, INC.
ENGINEERING & SURVEYING
4550 State Hwy 360, Ste. 180, Grapevine, TX 76051
jwargo®bhbinc.com 817-251-8550 www.bhbinc.com
BHB Project #2016.703.000 TBPE Finn F-44 TBPLS Firm 10011302
DRAWING FILE: E:\Survey16\703\000 Chisholm Trail Addition 2nd MOB\Dwg\Storrs Water Detention.dwg I Page 2
EXHIBIT B1: DESIGN CALCULATIONS (1 OF 2)
Required Detention Volume by iSWM Equations 1.26, 1.27, 1.28a, and 1.28b
Frequency a b C A Qa Tc Td VOL prelim P180 Ptd VOL max VOL max
(acres) (cfs) (min) (min) (co (in) (in) (co (ac-ft)
1-Year 95.835 13.425 0.71 1.49 1.82 10 25.25 2046.82 1.77 1.03 3510.55 0.08
10-Year 203.93 21.09 0.71 1.49 2.91 10 34.83 4148.72 3.45 2.07 6925.89 0.16
100-Year 1 322.07 1 24.388 1 0.71 1 1.49 1 4.14 1 10 38.97 6491.97 5.43 3.24 10885.33 0.25
Since Area W-2 bypasses the proposed detention basin,
Qa =(Pre-Development Area W)-(Post Development Area W-2)
Ex: Qa(100) =4.66-0.52
=4.14 cfs
Detention Basin Provided Volume
Elevation Area A Elevation Storage Total Storage
(ft) (so (ft) (co (co
750.5 10,711.1
0.5 4657 21491
750 7,917.4
1 6752 16834
749 5,587.4
1 5292 10082
748 T774,996.7
1 4026 4790
747 3,054.9
0.5 764 764
746.5 0.0
1 Year Detention Basin Outlet Calculations
Detention Basin Volume&1-Year Head Provided at Orifice
Storage Volume Required(cf)= 3,999 Basin Depth(ft)= 1.30
1-Year Volume Required=3,511 cf Storage Volume Provided(co= 16,826 Basin WSEL(ft)= 747.8
Elevation Area A Elevation Storage Total Storage
(ft) (so (ft) (co (coOrifice Flowline 746.50
Orifice Area(sf)= 0.20 Q=Cd'A[(2gH)^.5]
747.8 4,476.2 Head Provided(ft)= 1.28 Q=(.62)*(.196)*[(2`32.2'1.28)^.5]
0.8 3012 3776 1-6"Orifices Qorifice(cfs)= 1.10 Q=1.10 cfs
747 3,054.9
0.5 764 764 Qallowable(cfs)= 1.82
Qbasin(cfs)=Qorifice= 1.10
Qremaining(cfs)=Qallowable-Qbasin= 0.72
Efficiency(%)= 60.44%
K IL
EXHIBIT 132: DESIGN CALCULATIONS (2 OF 2)
10 Year Detention Basin Outlet Calculations
Detention Basin Volume&10-Year Head Provided at Orifice
Storage Volume Required(cf)= 7,869 Basin Depth(ft)= 2.00
10-Year Volume Required=6,926 cf Storage Volume Provided(cf)= 16,826 Basin WSEL(ft)= 748.5
Elevation Area A Elevation Storage Total Storage
(ft) (sf) (ft) (cf) (cf) Orifice Flowline 746.50
Orifice Area(so= 0.20 Q=Cd*A*[(2gH)^.5]
748.5 5,276.0 Head Provided(ft)= 1.75 Q=(.62)*(.196)*[(2*32.2*1.75)^.5]
0.5 1 2568 7358 1-6"Orifices Qorifice(cfs)= 1.29 Q=1.29 cfs
748 4,996.7
1 4026 4790 Orifice Flowline 748.00 Q=Cd*A*[(2gH)^.5]
747 3,054.9 Orifice Area(so= 0.39 Q=(.62)-(.196)-[(2-32.2-0.25)A.5]
0.5 764 764 Head provided(ft)= 0.25 Q=0.49 cfs
2-6"Orifices Qorifice(cfs)= 0.98 Qtotal=0.49*2=0.98 cfs
Qallowable(cfs)= 2.91
Qbasin(cfs)=Qorifices= 2.27
Qremaining(cls)=Qallowable-Qbasin= 0.64
Efficiency(%)= 78.01%
100 Year Detention Basin Outlet Calculations
Detention Basin Volume&100-Year Head Provided at Orifice
Storage Volume Required(cf)= 12,840 Basin Depth(ft)= 2.70
100-Year Volume Required=10,886 cf Storage Volume Provided(cf)= 16,826 Basin WSEL(ft)= 749.2
Elevation Area A Elevation Storage Total Storage
(ft) (sf) (ft) (cf) (cf) Orifice Flowline 746.50
Orifice Area(so= 0.20 Q=Cd*A[(2gH)^.5]
749.2 5,979.2 Head Provided(ft)= 2.451 Q=(.62)*(.196)*[(2*32.2*2.45)^.5]
0.2 1157 11238 1-6"Orifices Qorifice(cfs)= 1.53 Q=1.53 cfs
749 5,587.4
1 5292 10082 Orifice Flowline 748.00 Q=Cd*,4[(2gH)^.5]
748 4,996.7 Orifice Area(so= 0.39 Q=(.62)*(.196)*[(2*32.2*0.95)^.5]
1 4026 4790 Head provided(ft)= 0.95 Q=0.95 cfs
747 3,054.9 2-6"Orifices Qorifice(cfs)= 1.90 Qtotal=0.95*2=1.90 cfs
0.5 764 764
Qallowable(cfs)= 4.14
Qbasin(cfs)=Qorifice= 3.43
Qremaining(cfs)=Qallowable-Qbasin= 0.71
Efficiency(%)= 82.85%
100 Year Emergency Spillway Outlet Calculations
Storage Volume Required(cf)= - BasinDepth(ft)= 3.1
Storage Volume Provided(cf)= - Basin WSEL(ft)= 749.6
Orifice Flowline -
Orifice Area(so_
Head Provided(ft)_
1-6"Orifices Qorifice(cfs)= Clogged
Orifice Flowline
Orifice Area(sf)_ -
Head provided(ft)_
1-6"Orifices Qorifice(cfs)= Clogged
Weir Flowline= 749.40
Weir Length(ft)= 46.00 Q=Cd*(L-0.2H)(H^(3/2))
Head Provided(ft)= 0.20 Q=(2.63)*(46-0.2(0.2))*(0.2^(3/2))
Qweir(cfs)= 10.81 Q=10.81 cfs
Qrequired(cfs)= 10.21
Qbasin(cfs)=Qorifice+Qweir= 10.81
0weir>Qrequired;0100 Urbanized Passes w/6"Freeboard
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EXHIBIT 133: SCHEMATIC PLAN - PLAN VIEW
a.
J ♦ /Je _ �qJ je .. v
J'
7-7.5'UTILITY
EASEMENT I' J
Aj
1/2" IRF _
J
J
! m J
J
♦ J
Ja
76' X'i J9
�' ♦' / .J .
PROPOSED STORM�TER
e tS>J S
DETENTION ALL
TOP=750.50 ° J.
FG=74 .50 jp ,
(1' FREEBOARD PROVI ED ;�� `s ° aJ
ABOVE 100-YR W EL)
e J
6"ORIFICES e ♦2� �O,
THROUGH WA L 46. IER J
J
B
E� 1 .0
5'CONCRETE `
TROUGH WITH 6" PROPOSE
CURB TO SIMU ATE {', 1 .0 ,:
DETENTIO
SHEET
LOW ��.
BASIN � • m
2' ROCK RIP-RAP 1.5% m
ON FILT R FABRIC 2'CO CRETE '
3 .0 STRI AT ORIFICES
10' MAI TENANC 1
E� 1 .0 MP @ 12% R
2.5
TB 3 Q .0
5/8" CRF
7.5'UTILITY
N EASEMENT
I FUTURE STORMWATE
0 20' DETENTION WALL I
6iiiiii TOP=750.50
TOE =746.50
Scale 1" = 20' (1' FREEBOARD PROVIDED
ABOVE 100-YR WSEL)
EXHIBIT 134: SCHEMATIC PLAN - SECTIONS A & B
SECTION A-A DETENTION POND WALL OUTLET
752
OPO WALL
751 46'WEIR s "FRE BOARD 750.50
z (SPILLWAY) 13' REEB ARD
750 00-YR U L
y
wP4
� 3z
749 a
z
748 w 1_y
O : 2. ti'ORIF l.%CO
747 (1;0= R&'10 1�E3}
=fl RIFT S
746
0 20 40 60 80 100 120
SECTION B-B DETENTION POND CROSS SECTION
752
751 l
wl
_z I 46' EIR PRO . CONC.
750 J (EM RGEN Y P VEME T
vv
�1
wl — — — — - - —
749 01L — — — — — —
al 2- R)"ORIF CES 102'R
S Y
�
1 -Y
748 � — _ _cn �
w 1 1-6" RIFIC S
747 1 1-Y
EX. G DE
746 "-TQJNCRE E
STRI
I 5'CO CRE
TROU H
745 '
1
lt-21 RO K RIP- P
744 ON FI TER F BRIC
1
1
743
0 20 40 60 80 100 120
�1L
EXHIBIT 135: SCHEMATIC PLAN - DETENTION BASIN GRAVITY WALL DETAIL
GROUTED STONE GRAVITY WALL
OR STACKED BLOCK WALL
BY CONTRACTOR
2-6"PVC ORIFICES
VARRIES 0 TO 4'
1" DRAIN THROUGH ALONG EDGE OF BASIN
CONCRETE TROUGH
@ 4'CC ALONG TROUGH
5'CONCRETE 1-6"PVC ORIFICE
TROUGH .En
2'ROCK RIP-RAP
ON FILTER FABRIC �6" 6"-j•. FINISHED GRADE
EXISTING
III
_ ( = Al"
GRADE1-21 5' `'..:.::` :... 1 •': �. .r
1 C.F. DRY WELL - I-III
CRUSHED STONE OR
PEA GRAVEL WRAPPED #3 BAR @ #4 BAR @
IN FILTER FABRIC 18"C.C.E.W. 12"C.C.E.W. i-
AT 1"TROUGH DRAINS
DETENTION BASIN
GRAVITY WALL DETAIL
N.T.S.
NOTE:
CONTRACTOR SHALL SUBMIT
DETAILED SHOP DRAWINGS
PREPARED BY A PROFESSIONAL
ENGINEER FOR PERMITTING AND
APPROVAL PRIOR TO CONSTRUCTION
Exhibit "C"
CITY OF FORT WORTH STORM WATER 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.
STORM WATER DETENTION FACILITY AGREEMENT 8
Rev.09/10/2012
Exhibit "D"
Storm Water Structural Maintenance CHECKLIST
FREQUENT REPAIRS REPAIRS
INSPECTION DATE REQUIRED MADE NOTES
Mowing
Remove Trash and
debris
Inspect irrigation
system operation
Remove grass
clippings
Violations Noted
MINOR
INSPECTION
Condition of Pond
Amount of silt in
and
Amount of silt in
flume
Amount of ponded
water
Amount of wetland
vegetation
Location of Erosion
Percent of
vegetation
Condition of trash
guard
Location of Erosion
MAJOR
INSPECTIONS
Condition of Storm
Water Quality
Structure
Type of Storm
Water Quality
Structure
Structure type and
Condition
Condition of Rip-
STORM
i -STORM WATER DETENTION FACILITY AGREEMENT 9
Rev.09/10/2012
Ra
Condition of
filtrations stem
Berm or
Embankment
Settlement
Location of erosion
Evidence of
Animals
Evidence of Aquatic
life
Condition of
Aeration
Foundation
STORM WATER DETENTION FACILITY AGREEMENT 10
Rev.09/10/2012