HomeMy WebLinkAboutContract 53488 DOE #
44
FFB Cfi STORMWATER FACILITY
cino�Fo 3?o p� MAINTENANCE AGREEMENT
cl�s��A�AN r/f
THIS AGREEMENT, made and entered into this day of
by and between Lie J Vkjl LL • acting by and through
JAM C SfEWAQ , 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 q acre tract located in the_,W• ,,Jes Survey, Abstract 715,
Tarrant County, Texas according to the deed recorded in Volume 3 �53 , Page -7.3 ,
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 f OWN
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 Stormwater 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 Stormwater Management Facilities be constructed and maintained on a portion
of the Property; and
WHEREAS, the City requires that on-site Stormwater Management Facilities
("Facility") as shown on the Plan be constructed and adequately maintained by the
TX
ffik
STORMWATER FACILITY MAINTENANCE AGREEMENTRev.11/17/2016
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 Stormwater 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 Stormwater Facility
includes all pipes, channels or other conveyances built to convey Stormwater
to the facility, as well as all structures, improvements, and vegetation provided
to control the quantity and quality of the Stormwater. Adequate maintenance is
herein defined as good working condition so that these facilities are performing
their design functions. The Stormwater 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
STORMWATER FACILITY MAINTENANCE AGREEMENT 2
Rev.11/17/2016
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
STORMWATER FACILITY MAINTENANCE AGREEMENT 3
Rev. 11/17/2016
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]
STORMWATER FACILITY MAINTENANCE AGREEMENT 4
Rev.11/17/2016
Executed this 3rd day of 2020
Landowner City of Fort Worth
Name: I
Q Assistant City Manager
Title:
4w
Approved as to Form and Legality
Assistant ity orney
{ ATTEST
0
1 e t
OFFICIAL RECORRD
CITY SECRETARY
STORMWATER FACILITY MAINTENANCE AGREEMENT rJ
Rev.11/17/2016
STATE OF TEXAS §
COUNTY OF TARRANT §
This instrument was acknowledged before me on J02) by
134
JA _RU2w+6oF�Assistant City Manager of the City of Fort Worth, on beffdf of the City of
Fort Worth.
Oti*Pv•+,} •, M ARIAS.SANCHEZ
•_ ;'v Notary ID#2256490 Nokiry Public, State of Texas
>F F t Expires December 19,2021
STATE OF TEXAS §
COUNTY OF TARRANT §
Before me, the undersigned authority on this 3 r`A day of
20a� personally appeared
known
to me to be the person whose name is subscribed to the foregoing instrument and
acknowledged to me that the same is the act of
and that he executed the same as its
pitsiA and as the act of such `— ,,\u-k,�"V `and for the purposes and
consideration expressed in the foregoing instrument.
DANNY WINKELMAN Notary ubl , State of Texas
Notary ID#126351311
P My Commission Expires
''E of SAY December 12, 2023
fir)@ g Year f�$"'ASn it �n. ?1�7. r7
y f' .�i,l
FT. WOATH-11�
STORMWATER FACILITY MAINTENANCE AGREEMENT u
Rev.11/17/2016 ;^
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.
Janie S Morales
Development Services Manager
OFFICIAL RECE
CITY SECRETARY
FT WORTH,TX
RETENTION POND EASEMENT
"EXHIBIT A"
PAGE 1 OF 2
/ LEGACY SQUARE ADDITION I
CAB,A.SL.6297 O.P.R.T.C.T.
i - L _ - 1 - -I - 1 -T- -
�
I I I NOTES:
I I I)NO ABSTRACT OF TITLE OR TITLE COMMITMENT WAS PROVIDED TO
THIS SURVEYOR.RECORD RESEARCH DONE BY THIS SURVEYOR WAS
MODE ONLY FOR THE PURPOSE OF DETERMINING THE BOUNDARY OF
I !6" ND
THIS PROPERTY AND OF THE ADJOINING PARCELS RECORD DOCUMENTS
FOUND 5
IRON ROD 1611 OTHER THAN THOSE SHOWN ON THIS SURVEY MAY EXIST A
ENCUMBER THIS PROPERTY.
"CARTER 6 BURGESS"aL
I ELEV:767.66' 4.003 ACRES 2)ALL CORNERS ARE POINTS,UNLESS OTHERWISE NOTED
174361.5 SQ.FEET 3)UNDERGROUND UTILITIES WERE NOT LOCATED WRING THIS SURVEY.
I D2I6116558.O.P.R.T.C.T. I CALL III AID/OR UTILITY PROVIDERS BEFORE EXCAVATION OR
CONSTRUCTION
4I GOVERNMENTAL ENTRIES MAY REWIRE THIS PROPERTY TO BE
J FURTHER PLATTED AND RECORDED WITH THE COUNTY CLERK
m � 51 BEFORE CONSTRUCTION PLEASE CONSULT ALL APPLICABLE
3 GOVERNING ENTITIES REGARDING RULES 6 REGULATIONS,THAT MAY
Q I I 1 u AFFECT CONSTRUCTION ON THIS PROPERTY.(LE.ARCHITECTURAL
CONTROL COMMITTEE,MUNICIPAL DEPARTMENTS,HOME OWNERS
Q AS50C..ETC.)
NAVE AADIU3 MCLFNGIH fMORO LENGTH fNORD BfARVIG DATA ANGLE N y
U I EQ 66920' I3
.74' IMST L T7.27'36'ME) 9.32'27' p p 6)BEARWGS,DISTANCES.AND ELEVATIONS DERIVED FROM G.P.S.
Q EC2 46.W 23.62' 23.36' N 5 21.51W u•M IW OBSERVATIONS AND REFLECT NAD.1933,TEXAS STATE PLANE
= EC3 N.00' 2.69' 2.69' n s H'45M'VA 6.2510• I COORDINATE SYSTEM,NORTH CENTRAL ZONE 4102.(GRID)
Ct
Ft
Q LINE SCARING DISTANCE
Z EL2 NIS 07'424T• 353'
I E72 5 00'35'M" 24.4'
FL3 745 44.24'46"WM 2L16'
64 s 00.35TP W(p 6.13
EL5 HIS)69.06'05' 1669'
EL6 INS)00=355• 44J6'
FOUND I FOUND 5/6" IRON RODSC I .EASEMENT
IRON ROD
"CURTER B BURGESS"I N 69°24'38"E 152.72'
I ELEV:778.06'
3
I 0.369 Acre N
`pt,by v,O�0.!! I ELS PRIVATE DETENTION
o c
Z3,OP POND EASEMENT 5.24'
CIO
/
It
C
L
20,BUILDING S'R.O.W.
SETBACK DEDICATION
o-oz027]&A.rn
10'UTMY r4rM�
EASEMENT /
�N - - - - - 2D- -
—W HATE ts��NEoFEwnvl RO ADi
Q$00 C T4 ER
D2022329T
O.P.R.T.C.
i
TEXAS
100 200 300 SURVEYING
FIRM NO.10100000•WWW.TXSURVEYING.cam INC.
RETENTION POND EASEMENT eA
"EXHIBIT A"
PAGE 2OF2
EASEMENT DESCRIPTION
OF A 0.369 ACRES RETENTION POND EASEMENT OVER AND ACROSS A PORTION OF THE J.W.HAYNES SURVEY,ABSTRACT
No.795.TARRANT COUNTY,TEXAS:BEING OVER AND ACROSS THAT CERTAIN TRACT OF LAND AS RECORDED IN
D216116558.OFFICIAL PUBLIC RECORDS.TARRANT COUNTY.TEXAS:BEING FURTHER DESCRIBED BY METES AND BOUNDS
AS FOLLOWS:
THE FOLLOWING BEARINGS DERIVED FROM G.P.S.OBSERVATIONS PERFORMED BY TEXAS SURVEYING,INC.AND REFLECT
N.A.D.1983,TEXAS STATE PLANE COORDINATE SYSTEM.NORTH CENTRAL ZONE 4202.(GRID)
BEGINNING AT A POINT IN THE EAST LINE OF D216116558.OFFICIAL PUBLIC RECORDS,TARRANT COUNTY.TEXAS FOR THE
NORTHEAST AND BEGINNING CORNER OF THIS EASEMENT. WHENCE THE NORTHWEST CORNER OF LOT L BLOCK J.
LEGACY WEST ADDITION,VOLUME 388-153,PAGE 73.PLAT RECORDS,TARRANT COUNTY,TEXAS BEARS N 83'58'28"W
379.00 FEET.
THENCE S 00'00'24"W 90.36 FEET TO A POINT IN A CURVE TO THE RIGHT WITH A RADIUS OF 869.20 FEET AND A CHORD
WHICH BEARS S 77'27'38"W 144.57 FEET FOR THE SOUTHEAST CORNER OF THIS EASEMENT.
THENCE OVER AND ACROSS SAID D216116 5 5 8 THE FOLLOWING COURSES AND DISTANCES:
ALONG SAID CURVE AN ARC LENGTH OF 144.74 FEET TO A POINT FOR THE SOUTHWEST CORNER OF THIS EASEMENT.
N 07'42'47"W 3.53 FEET TO A POINT IN A CURVE TO THE LEFT WITH A RADIUS OF 48.00 FEET AND A CHORD
WHICH BEARS N 21'51'56"W 23.39 FEET FOR A CORNER OF THIS EASEMENT.
ALONG SAID CURVE AN ARC LENGTH OF 23.62 FEET TO A POINT IN A CURVE TO THE LEFT WITH A RADIUS OF 24.00
FEET AND A CHORD WHICH BEARS N 32'45'09"W 2.69 FEET FOR A CORNER OF THIS EASEMENT.
ALONG SAID CURVE AN ARC LENGTH OF 2.69 FEET TO A POINT FOR A CORNER OF THIS EASEMENT.
N 0003514"W 24.34 FEET TO A POINT FOR A CORNER OF THIS EASEMENT.
N 44'24'46"E 22.16 FEET TO A POINT FOR A CORNER OF THIS EASEMENT.
N 00'35'14"W 8.13 FEET TO A POINT FOR A CORNER OF THIS EASEMENT.
N 89'06'05"W 16.69 FEET TO A POINT FOR A CORNER OF THIS EASEMENT.
N 00*43*55"E 44.16 FEET TO A POINT FOR THE NORTHWEST CORNER OF THIS EASEMENT.
N 89*24*38"E 152,72 FEET TO THE POINT OF BEGINNING.
EASEME C IPT R IED CORRECT:
OF T
�X S T r �->F
BUCKER,R.P.L.S NO.6444 O
(AS SURVEYING,I .
............................
WEAT ERFORD.TX76086 KYLE RUCKER
817.594-0400 ....-.-0 .............°....
JN160508DRNESMNTEXHIBIT f, 6444 Q
JANUARY 6,2020 V `OFf 5 S\0?•y0
"S�R'4
TEXAS
SURVEYING
FIRM NO.10100000-WWW.TXSURVEYING.COM
PRE-DEVELOPED DRAINAGE CALCULATIONS
NAME C Tc 11 15 1100 A Q1 Q5 Q100
OF-A 0.65 10 4.06 5.74 9.24 0.026 0.07 0.10 0.16
0 F-B 0.65 10 4.06 5.74 9.24 0.215 0.57 0.80 1.29
OF-C 0.65 10 4.06 5.74 9.24 0.047 0.12 0.18 0.28
OF-D1 0.65 10 4.06 5.74 9.24 0.035 0.09 0.13 0.21
OF-D2 0.3 15 3.32 4.86 7.98 0.544 0.54 0.79 1.30
OF-El 0.65 10 4.06 5.74 9.24 0.032 0.08 0.12 0.19
OF-E2 0.3 19 2.91 4.34 7.21 1.527 1.33 1.99 3.30
A 0.3 17 3.1 4.59 7.57 0.151 0.14 0.21 0.34
B-1 0.3 17 3.1 4.59 7.57 1.128 1.05 1.55 2.56
B-2 0.3 13 4.06 3.58 5.18 0.083 0.10 0.09 0.13
C 0.3 21 2.74 4.13 6.89 1.396 1.15 1.73 2.89
D 0.3 20 2.82 4.23 7.05 1.130 0.96 1.43 2.39
E 0.3 10 4.06 5.74 9.24 0.115 0.14 0.20 0.32
TOTAL ON-SITE AREA = 4.003 ACRES
Pre-Developed Area OF-A Tc Pre-Developed Area OF-E2 Tc Pre-Developed Area E Tc
C D S C D S C D S
0.65 168 2.38 0.3 511 5.08 0.3 182 7.14
Tc= 7.86 Tc= 18.94 Tc= 10.09
Pre-Developed Area OF-B Tc Pre-Developed Area A Tc
C D S C D S
0.65 168 2.38 0.3 394 5.2
Tc= 7.86 Tc= 16.50
Pre-Developed Area OF-C Tc Pre-Developed Area B-1 Tc
C D S C D S
0.65 31 6.45 0.3 394 5.2
Tc= 2.42 Tc= 16.50
Pre-Developed Area OF-D1 Tc Pre-Developed Area B-2 Tc
C D S C D S
0.65 31 6.45 0.3 180 3.33
Tc= 2.42 Tc= 12.94
Pre-Developed Area OF-D2 Tc Pre-Developed Area C Tc
C D S C D S
0.3 337 5.04 0.3 566 4.15
Tc= 15.42 Tc= 21.32
Pre-Developed Area OF-El Tc Pre-Developed Area D Tc
C D S C D S
0.65 31 6.45 0.3 543 5
Tc= 2.42 Tc= 19.62 TOWN AND COUNTRY STORAGE
200 NORTH ACADEMY BOULEVARD
FORT WORTH, TEXAS
ENGIINEERING EXHIBIT B
DEC. 17, 2019 STORMWATER CALCULATIONS , OF
CV 16-0040
POST-DEVELOPED DRAINAGE CALCULATIONS
NAME C Tc 11 15 1100 A Ql CIS Q100
OF-A 0.65 10 4.06 5.74 9.24 0.241 0.64 0.90 1.45
OF-B 0.65 10 4.06 5.74 9.24 0.047 0.12 0.18 0.28
OF-Cl 0.65 10 4.06 5.74 9.24 0.035 0.09 0.13 0.21
OF-C2 0.3 15 3.32 4.86 7.98 0.544 0.54 0.79 1.30
OF-DI 0.65 10 4.06 5.74 9.24 0.032 0.08 0.12 0.19
OF-D2 1 0.3 19 2.91 4.34 7.21 1.527 1.33 1.99 1 3.30
ON-A 0.9 10 4.06 5.74 9.24 0.210 0.77 1.08 1.75
ON-Al 0.3 10 4.06 5.74 9.24 0.024 0.03 0.04 0.07
ON-13 0.9 10 4.06 5.74 9.24 0,087 0.32 0.45 0.72
ON-C 0.9 10 4.06 5.74 9.24 0.498 1.82 2.57 4.14
ON-D 0.9 10 4.06 5.74 9.24 3.062 11.19 15.82 25.46
OWE 0.9 1 10 4.06 5.74 9.24 0.065 0.24 0.34 0.54
0N-F 0.9 10 4.06 5.74 9.24 0.075 0.27 0.39 0.62
ON-G 0.35 10 4.06 5.74 9.24 0.027 0.04 0.05 0.09
Post-Developed Area ON-A Tc Post-Developed Area ON-D Tc DRAINAGE AREAS ON-B & ON-G
C D S C D S ARE NOT COLLECTED IN THE
0.9 1 175 1 4.3 0.9 642 3.97 POND. ON-B IS BYPASSED TO
Tc= 1 2.93 Tc= 5.76 ACADEMY BLVD. ALL OTHER
ON-SITE AREAS ARE COLLECTED.
Post-Developed Area ON-Al T Post-Developed Area ON-E Tc
C D S C D S
0.9 1 15 1 2.66 0.9 100 5
Tc= 1 1.01 Tc= 2.11
Post-Developed Area ON-BTc Post-Developed Area ON-F Tc
C D S C D S DESIGN PRE-DEVELOP P05T-DEVELOP.
0.9 75 2.66 0.9 100 5 POINT ACRES CFS ACRES CFS NOTES
Tc= 2.25 Tc= 2.11 DP#1 0.177 0.5 0.087 0.72
DP#2 1.406 3.98 0.027 0.22 EX.DEVELOPMENT UNCHANGED
Post-Developed Area ON-C Tc Post-Developed Area ON-G Tc DP#3 1.443 2.6 0 0 NO ON-SITE FLOW ADDED
C D S C D S DP#4 1.709 3.9 0.544 1.3 NO ON-SITE FLOW ADDED
0.9 270 1 2.87 0.35 4 5 DP#5 1.962 0 1.559 DIRECTLY TO48"RCP
Tc= 4.16 Tc= 1.58 POND 0 0 4.327 DIRECTLY TO48"RCP
MODIFIED RATIONAL METHOD
Existing Runoff Coefficient 0.3 Proposed Runoff Coefficient 0.9
Area 4.003 Acres Area 4.003 Acres
Time of Concetration 21.32 Min. Time of Concetration 10 Min.
1 Year Runoff 3.27 CFS 1 Year Runoff 14.63 CFS
5 Year Runoff 4.92 CFS 5 Year Runoff 20.69 CFS
100 Year Runoff 8.21 CFS 100 Year Runoff 33.30 CFS
Qa,1 yr= 3.27 CFS Table 5.15: For 1 Yr Return Period:e=0.8217,b=43.653,d=8
Qa,5 yr= 4.92 CFS Tarrant County For 5 Yr Return Period:e=0.8142,b=71.154,d=12
Qa,100yr=1 8.21 CFS Rainfall Data For 100 Yr Return Period:e=0.7798,b=110.202,d=14
Td1= 39.86 Min. For1Yr Return Period:a=95.84,b=13.43
Table 1.18
Tc15= 50.30 Min. For 5 Yr Return Period:a=170.81,b=19.44
Rainfall Factors
Tc1100=1 58.62 Min. For 100 Yr Return Period:a=322.07,b=24.39
Ptd1= 1.21 in. P180-1= 1.77 in.
Ptd5= 2.06 in. P180-5= 2.95 n.
Ptd100=j 3.81 in. P180-100 5.44 n.
VPreliminaryl= 10611.85 Cu.Ft VMax1= 15570.67 Cu Ft
VPreliminary5= 17733.96 Cu.Ft VMaxS= 25380.99 Cu Ft
VPreliminary100=1 32256.99 Cu.Ft VMax100--j 46031.92 CuTt
TOWN AND COUNTRY STORAGE
200 NORTH ACADEMY BOULEVARD
FORT WORTH, TEXAS
WHITWORTH
ENGINEERING STORMWATER CALCULATIONS EXHIBIT B
DEC. 17, 2019 2 OF 7
CV 16-0040
772.25 - TOP OF POND
771.00 - 100 YR ELEV
4.00 a
a °
°
PRE-CAST STORM d
INLET d
1.08
d
768.80 - 5 YR ELEV
a °
a
°
/ \ a 767.70 - 1 YR ELEV
a I
� I a
\ 1.21
a \ /
a OPENING
765.00
°
OUTFALL PIPE
LINE D
OUTFALL CONTROL STRUCTURE
NOT TO SCALE
THE OUTFALL IS DESIGNED AS LOW AND HIGH ORIFICE. THE LOW
ORIFICE HAS A DIAMETER OF 1.21 FEET AND THE HIGH ORIFICE
HAS A DIAMETER OF 1.08 FEET. BOTH SHALL BE CUT INTO A
PIECE OF STAINLESS STEEL AND BOLTED TO THE FRONT OF 5'x5'
CONCRETE STORM BOX. THE OPEN TOP OF THE BOX SHALL
FUNCTION AS THE 100 YEAR OVERFLOW.
Q=Cd*A*SQUAREROOT(2Gh) POND VOLUME AND OUTFALL CALCULATIONS
C=DISCHARGE COEFFICENT STORM Elev VolReq. VolProv. QAllowed ORIF-1 ORIF-2 TOTALQ
A=AREA 100 771 46032 46265 9.53 6.57 2.94 9.51
G-GRAVITY CONSTANT 5 768.8 25380 25735 5.75 5.02 0 5.02
H=DEPTH FROM CENTER OF AREA 1 767.7 15570 16371 4.04 4.02 0 4.02
Outfall FL 765.12 0 0 0 0 0 0
ALLOWABLE OUTFALL
PRE-Q ONSITE OFFSITE BYPASS TOTAL Broad crested weir THE TOP OF THE STORM INLET SHALL REMAIN
4=26*L*h^15 OPEN AND FUNCTION AS THE EMERGENCY 100
. .
Q100 8.21 2.13 0.81 9.53 YEAR OVERFLOW FOR THE POND.
Q5 4.92 1.33 0.5 5.75 L(ft) 15
Ql 3,27 0.93 1 0.16 4.04 h(ft) 1.25
OFFSITE INCLUDES OF-A,OF-B,OF-C,OF-Dl&OF-El Q(cfs) 33.54
TOWN AND COUNTRY STORAGE
BYPASS AREAS ARE ON-B&ON-G 200 NORTH ACADEMY BOULEVARD
FORT WORTH, TEXAS
WHITWORTH
ENGINEERING STORMWATER CALCULATIONS EXHIBIT B
DEC. 17, 2019 3 OF 7
CV16-0040
— — — — — — EXISTING GRADE 773.0 — TOP OF BERM
4:1 S�0 — — — — — — — 772.25 — TOP OF POND
771.00 — 100 YR ELEV
J
O
�W
Z�
OF
J U
J
�c~n
COpE 768.80 - 5 YR ELEV o
769.0 TW
766.0 BW SLOPE VARIES
765.12 - FL 1.21' DIA
OPENING
POND SECTION A-A
REF. ISWM CONSTRUCTION PLAN
NOT TO SCALE
EXISTING GRADE
POND RETAINING
WALL TYPICAL
(HEIGHT VARIES)
PROPOSED POND BOTTOM
POND SECTION B-B
REF. ISWM CONSTRUCTION PLAN
NOT TO SCALE
TOWN AND COUNTRY STORAGE
200 NORTH ACADEMY BOULEVARD
FORT WORTH, TEXAS
WHITWORTH
ENGINEERING STORMWATER CALCULATIONS EXHIBIT B
DEC. 17, 2019 4 OF 7
C V16-0040
CONSTRUCTION SEQUENCE
PHASE 1 - GRADING
PHASE 2 - UTILITY CONSTRUCTION LEGEND
PHASE 3 - PAVING
PROPERTY LINE
PHASE 4 - LANDSCAPE /SOIL STABILIZATION
- _ EXISTING CONTOURS
DISTURBED AREA: ®p PROPOSED CONTOUR
3.993 ACRES +/- ------------- RIDGE
VALLEY
-- PROPOSED FIRE HYDRANTS
IV r 1 POWER POLE 8 GUY WIRE
-m— - SEWER LINE
-- WATERLINE
-ry—�- SEWER FORCE MAIN
-�— - OVERHEAD ELECTRIC LINE
-�—�- SILT SOXX OR SILT FENCE
® INLET PROTECTION
0' 40' 80'
SCALE: 1' = 40'
STA 0+56.82 LINE A
FL 18" HOPE = 770.47
�6 77 TW 776.00
7 -------- BW,775.30
TW 777.00 775
:43W 777.00 774
773
B 772 B
_ 7 1 `
770
\ /\ STA 0+00 LINE A TW 769.00 7
FL 16" HOPE = 767.00 OW 767.00
1 6
INSTALL 247 WIDE EP SO' LONG f / 766 __ „J
CONSTRUCTION ENTRANCE PER / ---- --- -PROPOSED --- _
DETAIL. (CONTRACTOR MAY RELOCATE DETENTION POND INSTALL SILT FENCE OR
ENTRANCE AS REQUIRED.) SILT SOXX(TYPICAL)
STA 0+00 LINE D
L CONNECT 6 CONSTROLTO OUT LLSTRUCTURE / TN jr..0 1
/ 00
TW 773.50 2 -
BW 766.20 FL 30" RCP = 765.DO ga 765 `\ SS
STA 0+00 LINE C / gU11-pi
CONNECT TO POND PIG
FL / W h
O FL 18" HOPE = 766.50 / STA 0+40 LINE D
COECT TO 48"RCP
N"`A _ FL NN30" RCP = 764.60
QY' FL 48' RCP = 763.78
INSTALL SLOTTED VANE
DRAIN NEENAH MODEL
R-3599-A OR APPROVED Y S�.J BCM
EQUAL ON GRADE
pRA1N
Lz4NSTAUL AND MAINTAIN
INLET PROTECTION (T1P)
EX.
ROAD _ STORM
.LE. COM. WHITE SETTLEMENT_ - - = G -0377 RAIN
VAULT _ — — — —�.c GF�n A n
TOWN AND COUNTRY STORAGE
200 NORTH ACADEMY BOULEVARD
FORT WORTH, TEXAS
WHITWORTH
ENGINEERING ISWM CONSTRUCTION PLAN EXHIBIT B
DEC. 17, 2019 5 OF 7
CV16-0040
POINT ACRES CFS NOTES
DP#1 0.087 0.72
DP#2 0.027 0.22 EX. DEVELOPMENT UNCHANGED
DP#3 0 0 NO ON-SITE FLOW ADDED
/ � \ DP#4 0.544 1.3 NO ON-SITE FLOW ADDED
DP#5 1.559 DIRECTLY TO 48" RCP
1 POND 4.327 DIRECTLY TO 48" RCP
\ OF-8 1 I 1
OF-Cl OF-D7
0.047 0.035 0.032
\
_ eoo•
797'
796 --- /
ON-A _ --- / 1 /
0.210 - ------ 793
\ - ---- -- _ 0' 60' 120'
/SCALE: 1" = 60'
0.087
LEGEND
ON-C �� —-__ PROPERTY LINE
0.575 — — --- ozo— EXISTING CONTOURS
------ lea - _ -- - '/ /� / v PROPOSED CONTOURS
--- -- / - - - - - FLOWLINE
\ j��� / ------- EASEMENT
BUILDING SETBACK
_
\ /� RETAINING WALL
/ / CONCRETE PAVEMENT
/i
FLOW ARROW
OUTFALI TRUCTURE F-C2
LIB 9- i 0.544 /
ON-Ai ---
0.024 /
�taOQJ \
P OSED DRAINAGE ZONE OF INFLUENCE
WW� /Al.TA X. 48-RC W-377 /
ON-E O PR/VA7E DE�EN71ON
DP#lN-F
0.065 P � �
377
i��
EX 48'RCP W-377 DP#Z EX. 20"INLET ��
any n•ous urc�w7x am�cm NOW,-
mu.wac W-377 �I
bo
oo�ss; s� — gErnEMENr ROAD
- - xoo
z+oo
TOWN AND COUNTRY STORAGE
200 NORTH ACADEMY BOULEVARD
FORT WORTH, TEXAS
WHITWORTH
ENGINEERING DRAINAGE AREA MAP EXHIBIT B
DEC. 17, 2019 6 OF 7
CV 16-0040
ANI'I i01 WIAA'LIW 1 �1
1 .� 0, 30
CA E: 1"=30'
}I
' I
' ZI
I o
In
w I
,� LU
_ �
N 00'14'23" W 174.74'
TOWN AND COUNTRY STORAGE
200 NORTH ACADEMY BOULEVARD
FORT WORTH, TEXAS
WHITWORTH
ENGINEERING PLANTING PLAN EXHIBIT B
DEC. 17, 2019
CV16-0040 7 OF 7
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 8
Rev.11/17/2016
Exhibit"D"
Stormwater 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
Stormwater Quality
Structure
Type of Stormwater
Quality Structure
Structure type and
Condition
Condition of Rip-
Rap
STORMWATER FACILITY MAINTENANCE AGREEMENT 9
Rev.1111712016
Condition of
filtrations stem
Berm or
Embankment
Settlement
Location of erosion
Evidence of
Animals
Evidence of Aquatic
life
Condition of
Aeration
Foundation
STORMWATER FACILITY MAINTENANCE AGREEMENT 10
Rev.11/17/2016