HomeMy WebLinkAboutContract 49219 X23
Q o CITY SECRUARY
RECEIVEDCN CONTRACTNCl, r�
�- 2011
DOE # WYOFFORTWOM
CITY SECRETARY '4
`9 S b £
STORMWATER FACILITY
MAINTENANCE AGREEMENT
THIS AGREEMENT, made and entered into this day of ,
by and between Aledo Ridge, LLC, acting by and through James B. Haddock,
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 33.163 acre tract located in the I & G.N. RR. Co. Survey, Abstract No.
1778, Parker County, Texas according to the deed recorded in, Instrument No.
D201629254 Deed Records, Parker 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 Aledo Ridge 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
STORMWATER FACILITY MAINTENANCE AGREEMENT t0FF:1C1A:L WCOrRev.12/29/2014
GIR�A�R 1rNv 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 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.12/29/2014
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.12/29/2014
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 Parker 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.12/29/2014
Executed this- CZ day of (Aylt 2017.
Landowner City of Fort Worth
7�
Name: ames B. Ha dock
Assistant City Manager
Title:
Approved as to Form and Legality
i /
Assistant City Attorney
EST
/6)' , ity Secretary
-7=3
�XAS
STORMWATER FACILITY MAINTENANCE AGREEMENT 5Rev. 12/29/2014
STATE OF TEXAS §
COUNTY OF TARRANT §
This instrument was acknowledged before me on 6 ti / by
, Assistant City Manager of the City of Fort Wo h, on behalf of the City
of Fort Worth.
41 -
MARIA S SANCHEZ1,�oory Public, State of Texas
My Cc,nmission Expires
1 December 19,2017
STATE OF TEXAS §
COUNTY OF TARRANT §
f
Before me, the undersigned authority on this 1 y day of
F.e b r6_A r , 2017, personally appeared James B. Haddock ,
known to me to bete person whose name is subscribed to the foregoing instrument and
acknowledged to me that the same is the act of Aledo Ridge, LLC , and that he executed
the same as its Ma n a ?& r and as the act of such Aledo Ridge, LLC and for
the purposes and considers ion expressed in the foregoing instrument.
otary ublic, State of Texas
RY PU
fRONNA PATNOE
= Notary Public, State of Texas
My Commission Expires
P�
May 22, 2018
STORMWATER FACILITY MAINTENANCE AGREEMENT 6
Rev.12/29/2014
EXHIBIT "A"
DESCRIPTION OF EAST DETENTION POND EASEMENT
BEING a 0.951 acre tract of land out of the I &G. N. RR. Co. Survey,Abstract No. 1778, Parker
County, Texas and being a portion of the land described in the Special Warranty Deed with
Vendor's Lien to Aledo Ridge, LLC, a Texas limited liability company, as recorded in
Document No. 201629254, Deed Records, Parker County, Texas (D.R.P.CT.), and being more
particularly described by metes and bounds as follows:
COMMENCING at a 3" brass capped monument found for the northernmost southwest
corner of said Aledo Ridge tract, and on the East Right-of-Way line of Farm to Market Road
No. 3325 (aka Farmers Road); THENCE North 75°19'15" East, over and across said Aledo
Ridge tract,a distance of 478.83 feet,to the POINT OF BEGINNING;
THENCE continuing over and across said Aledo Ridge tract the following courses and
distances:
North 89°15'47" East, a distance of 201.90 feet;
South 00°44'13" East,a distance of 204.99 feet;
North 45°44'23"West,a distance of 14.14 feet;
North 00°43'05"West, a distance of 55.14 feet,to a point for the beginning of a curve
to the left having a chord which bears North 07°03'41" West, a distance of 47.95 feet
and having a radius of 217 feet;
With said curve to the left, through a central angle of 12°41'12", an arc length 47.95
feet,to a point for the beginning of a reverse curve to the right having a chord which
bears North 02°21'13" West, a distance of 70.16 feet and having a radius of 183.00
feet;
With said curve to the right, through a central angle of 22°06'07", an arc length of
70.59 feet, to a point for the beginning of a reverse curve to the left having a chord
which bears North 08°51'11" East, a distance of 3.91 feet and having a radius of
720.00 feet;
With said curve to the left,through a central angle of 00°18'41", an arc length of 3.91
feet;
North 09°00'32" East, a distance of 18.56 feet to the POINT OF BEGINNING,
containing 41,436 Square Feet or 0.951 Acre of Land.
STORMWATER FACILITY MAINTENANCE AGREEMENT 7
Rev.12/29/2014
f
DESCRIPTION OF WEST DETENTION POND EASEMENT
BEING a 1.091 acre tract of land out of the I &G. N. RR. Co. Survey,Abstract No. 1778, Parker
County, Texas and being a portion of the land described in the Special Warranty Deed with
Vendor's Lien to Aledo Ridge, LLC, a Texas limited liability company, as recorded in
Document No. 201629254, Deed Records, Parker County, Texas (D.R.P.CT.), and being more
particularly described by metes and bounds as follows:
COMMENCING at a 3" brass capped monument found for the northernmost southwest
corner of said Aledo Ridge tract and on the East Right-of-Way line of Farm to Market Road
No. 3325 (aka Farmers Road); THENCE North 51°55'50" East, over and across said Aledo
Ridge tract,a distance of 190.24 feet,to the POINT OF BEGINNING;
THENCE continuing over and across said Aledo Ridge tract the following courses and
distances:
North 89°15'47" East, a distance of 252.58 feet;
South 09°00'32" West, a distance of 8.25 feet, to a point for the beginning of a curve
to the left having a chord which bears South 08°34'20" West, a distance of 11.88 feet
and having a radius of 780.00 feet;
With said curve to the left, through a central angle of 00°52'23", an arc length 11.88
feet,to a point for the beginning of a reverse curve to the right having a chord which
bears South 14°35'01" West, a distance of 41.10 feet and having a radius of 183.00
feet;
With said curve to the right, through a central angle of 12°53'44", an arc length of
41.19 feet, to a point for the beginning of a reverse curve to the left having a chord
which bears South 10° 09'24" West, a distance of 81.88 feet and having a radius of
217.00 feet;
With said curve to the left, through a central angle of 21°44'58", an arc length of
82.37 feet;
South 00°50'53" East, a distance of 55.21 feet;
South 44°37'09"West,a distance of 14.24 feet;
South 89°14'19"West, a distance of 212.90 feet;
North 00°44'13" West, a distance of 205.21 feet to the POINT OF BEGINNING,
containing 47,514 Square Feet or 1.091 Acre of Land.
STORMWATER FACILITY MAINTENANCE AGREEMENT 8
Rev.12/29/2014
ju
71
tR
t
STORMWATER FACILITY MAINTENANCE AGREEMENT
Rev.12/29/2014
EXHIBIT "B"
DESIGN CALCULATIONS (1 OF 3)
HYDROLOGY CALCULATIONS
Existit Runoff Calculations
Ora sago _Area__ e Tc 1-Yr I 10-Yr I 100-Yr I 1-Yr Q 10-Yr Q 10.0-Yr Q
Area,Pt ac rnn) (Whr) juUhr irvhr) (cfs) (c(s) cfs
06-1 2.62 0.45 20 2.75 4.76 7.05 3.24 561 8.31
- 05-2 3.41 0.45 20 275 4.76 705 422 730 1082
- 05-3 437 0.36 _ 20 2.75 4,76 - 705 - - 433 749 1109
- - A-1 16.18 0.30 20 1 2-75 4.76 - 7.05 1335 23.11 3422
A-2 16.46 0.30 20 2.75 4.76 705 1358 2350 3481
A-3 0.51 0.30 20 2 75 4,76 7 05 042 0 73 1 08
TotiA West 18 80 0.32 264 2 33 4 11 G 16 14 D4 2480 3118
Tou#1 East 24.24 --0.33 26.4 2.33 4.11 616 1872 3308 4958
Proposed Runoff Calculations
17+aargkje Area Tc 1-Yi I 10-Yr I 100-Yr I 1-Yr 0 10-Yr 0 100-Yr Q
ArexPt (ac} mn' 1rVhr' In1hr iflftr (cfs cfs' cfs
05 1 26.) 0,45 20 2.75 476 7.05 325 561 831
A•2 325 0.51 15 3.24 546 7.97 5.37 905 1321
05-1 +A-2 5.87 0.48 20 2.75 4-76 7.05 7.81 13.51 19.99
A-3- - - 3.76 0_51_- __ 15. __ _ -3-24 5.46 7.97-- 6_21 10.47-- - 1528
0q,1 +A-2,3 9.63 0,49 20 2.75 4.76 7.05 13.10 2264 33.50
A-4 3.41 0.51 is 3.24 5.46 7.97 5.63 950 13.86
OS 1 +A-2,3,4 13.04 0.50 20.4 2.72 4.71 6.98 17.68 30.61 4534
A-5 3.78 0.51 15 3.24 5.46 7.97 6.24 1053 15 36
OS-1 +A-2,3,4,5 16.82 050 222 2.59 451 671 21.80 3801 5652
A-6 1 99 0.30 15 3.24 546 7.97 1.93 326 476
06-1 +A-2-3,4,5,6 18.81 ' 0.48 22.8 2.55 4.45 6.63 22.98 40.14 59.75
QS-2 341 0.45 20 2.75 4.76 7.05 _ 4_23 7 31 10.81
A-7 3 67 0.51 15 3.24 5.46 7,97 6.05 10.21 14.90
_ OS-2 + A-7 7.08 0.48 20 2.75 _4.76 _ 7.05_ 9.38 16.21 _ 23.99
A-8 3.47 0.51- - 15 - 3.24 -- 5.48 7.97 5.73 9.67 14-10
06-3 ^-, ---0.42 0.36 20 2.75 4.76 705 0.41 0.72 1.06
05-4 1 11 0 36 20 7 75 4 76, 7.05 1 10 190 2.82
05.2,3,4+A-7,8 12.07 0.47 20 2.75 4 76 7_05_ 15.77 2.7.26 40.33
06.5 1.12 0.36 20 2.75 4 76 7.05 1.11 1.92 2.84
Arg 3.82 0.51 15 3.24 546 7.97 6.31 10.65 15_54
_- 05-2.3.4,5+-A-7,8.9---- --17.02 -0,47 20_4_ 2.72 ._ 471 698 22.01D 5640
06.6 1.38 0.35 20 2.75 4.76 1 7-05 1.37 2-36 3.50
A-10 3.45 0.51 15 3.245.46 7.97 5.69 9-61 14.02
06-2.3,45,6+A-7,8,9,10 21.85 0.47 22.2 2,59 4.51 6.71 25.76 s 46.64 69.35
05-7 0.35 r;36 20 - 2.75 476 7.05 0.35 0.80 0.89
A-11 2.05 0,30 15 3,24 5.46 797 1.99 3,37 4,91
06-2,3,4.5,63+A-6,7,8,9,10 24,25 I 0.46 228 2-55 4.45 663 28 22 49.30 73.39
A-1 0.51 0.30 20 2.75 4.76 705 0.42 0.73 1.08
Total West 18.81 0.48 22.8 2.55 4.45 6.63 22.98 40.14 59-75
ToW East 24.25 0.48 1 22.8 1 2,55 4.45 6,63 28.22 1 49.30 1 73.39
STORMWATER FACILITY MAINTENANCE AGREEMENT 10
Rev.12/29/2014
EXHIBIT "B"
DESIGN CALCULATIONS (2 OF 3)
DETENTION CALCULATIONS (FAST)
Required Denticn Stor a Vo'umes by ,SWM E uabons 2 1 26. 27. 28a,and.28b For East Pond
Frequency--,a - b C A ! Qa Tc Td Vprelmnary P180 ' Ptd Vma■ Vma.
(acres) (ch) _lmin) (m n) (fl"3) (n) (ink(R"3) {ac•fl
1•Year 95.164 13.848 0.46 _24.24 16.72 __ 22.80__ 25.63__ 13.835 _1.73 1.01 23.800 ._ 0_54_
10•Year 198.53 20.608 0.48 24,24 33.08 22.80 31,72 25.836 3,37 } 196 fi44.400 1.02
100-Year 321.89 24.527 0.46 2424 1 49.58 22.80 34.85 39.742 5.37 1 3.09 69,100 1 1.59
Actual Detention Storage Volumes For East Pond
Allowed Actual Actual Actual S I
Rcquked Storage Water Surface Actual 01
Freq. 1 Discharge TaiNrater Discharge(0) Allowed 0 Storage(S)Required S
(cis) (ac-fl) (R°3) (n) _ _(elev) _ (c6_)- -- (11'3)
1-Yea( { 18.72 054 23.600 1 986 13 966.1 1 '- 18 71 __ _ 99.2% _ 1.192 2199%
10-Year 33 08 1.02 44.400 98640 988.51 j 33.05 99.991 1.464 1437%
100•Year 4958 1 59 690100 ! 08680 988.86 I 49.58-- 100.0% 1.711 107.9%
East Pond Outlet East Pond eirul�tlet
UIS Flow Lme 987.75
WS Flow Line 985.10 Width '
0 00
DIS Flow Line 985.00 Weir Coefficient Co 3 03
Number of Pipes 2.0
Diam,of Pipe(in) 12.0
Lon7th(0) 1.0
Material Concrete
Shape _ Circular
End Square Edge
n T 0.013
Graoty(g) 32.2
Ke 0.5
N.11ber 1
K -- -0.0098
d 2
OA3987
Y' 0.87
Col ect"'. _ -0.5
V nrm 1
Stage-Volume-Discharge Rating Table East Pond
Elevation(R) Storage Pipe Discharge Pipe Velocity Weir Discharge Weir Velocity Total Discharge
(ac-11) (tis) (fps) II (cis) (fps) (cis)
98500 0.00 0.00 000 0.00 0.00 0,00
988.00 0.07 0.00 0.00 0.00 0.00 0.00
987.00 _ _0_.48_ 7.27 4.63 0.00 0.00 7.27
888.00 1.12 11.85 7.54 3.88 155 15.73
989.00 1.80 __ _ 14.23 __ 906 43.32 _ _3.47 __ _57.55 _
090.00 2.55 - 16.21 10.32 10463 4.65 120.64
Freeboard if outlet clogged
0-CA-41"'
0• 49.58 ch
C= 3.12
L= 10.00 fl
H= 1.36 it
Flow Line= 987.75 it
WSE= 989.11 fl
Top of Pond= 890.00 R \
Freeboard= 0.89 it \V_`
STORMWATER FACILITY MAINTENANCE AGREEMENT 11
Rev.12/29/2014
EXHIBIT "B"
DESIGN CALCULATIONS (3 OF 3)
DETENTION CALCULOW7, (WC-`,11;
Requ,tedl 0enhon Storage Vaumes by iSWM Equations 1 1 26. 27. 28a,and 28b For West Pond
Frequency I a b C A Oa Tc Td Vpresminay P1B0 Ptd \ f� r,i,
(arrest (ch) I_minl (m11) (R•3) Ce+l _ (e+) (R 31 (a(.
1•Year _i 95.164 13.8480,4794 18.81 14.04_ _ 22_BO 27.30_ 13.08_1 _1J3 _ _104 I.21 B00_ _n
10-Year I 198.53 20.808 ; 0.48 -18.81 _ 24 BO 22.80 33.04 24,620 3.37 2A1 -�_ -f-1 106 -n
100-Year 1 321.89 24.527 1 0.48 t 18.81 37.18 22.80 37.36 38.046 1 5.37 3.18
Actual Detention Storage Volumes For West Pond
Allowed Required Storage Tad Waler Water ActualI Actual O! Actual Actual S
Freq. Discharge Surface Discharge(0)I Stdrage(S)Roqulred S
____ _ (clsl__.,_ loc•R V31 (gldv) (elgv cls) Allowed O (acR)
1-Year `14.04 0.50 21,800 98853 989.03 1.1.03 100% 1 1.04 207%
10-Year 24.80 0.94 41.100 988.53 989.39 24.60 100% 1.29 137%
100-Year 3718 1.47 04,200 98853 989.75 37.18 100% 1,54 105%
West Pond Oulkil West Pond Weir Outlet
_ _ UtS Flow floe19813-7-5
WS Flow Llne nn 1,.10 Width ---6 00---
DrSFlow Urie 455 3 WeWCoefRaient Col 3 32
Nmnber of Pipes 1 u
D1am of Pipe(Int __ 21 a
Le!NlT,R) - - 0 50
Material Corxleli
Shale - -Circu',u
End Squure E••w
n- --0 013
Granty(9) 32:
Ke 0 5
K 0.0098
r.1
0.0377
Y 06,
Cofleclion
Frtr.i 7
Stage-Volume-Discharge Rating Table West Pond
I e
StoraP" Pipe Weir WenVTotal
Llevalfon(R)I Discharge Velocity Discharge 1 Discharge
(ac-R) (ch) (fps) (ch) (pelocity,s) (ch)
985.00 0 00 0.00 0,00 0.00 1 000 0-00
98600 ' 0.00 0.00 000 0.00 T 0.00 o.00
987.00 0.10 0.00 0-00 0.00- 0.00 1 0.00
988.00_ _ 0.46 _ _ 0.00 0.00 _ _ 0.00_ .88{{ 0.00 - 000
98900 i 1.02 10.78 4.48 249- 1 1327-
990.00 1.72 J 19.o6192 27.84 I 3.71 � 46.90
990.50 1.722 20-08 6.34 46.12 I 4.39 68.18
Freeboard if outlet clogged
O=CdaF1�:.``
--- __ O= 37.18I_cF_s__
C- 3 32t
1.= 600 m
.
li= 152n
F'GF Line= 988.75 n
WSE=
99027 tT
Top of Pond= 990 93 11
Ffeetoard= 066 n
STORMWATER FACILITY MAINTENANCE AGREEMENT 12 A4
�1
Rev.12/29/2014
EXHIBIT "B"
SCHEMATIC PLAN — PLAN VIEW
4s
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STORMWATER FACILITY MAINTENANCE AGREEMENT 13
Rev.12/29/2014
EXHIBIT "B"
SCHEMATIC PLAN - CROSS-SECTIONS
CROSS SECTION A
1000 — - - -- 1000
PROPOSED
RETARW WILL
996 E?ISI.GRNO. PROPOSED 996
RETAINING Wµ1
992 1 992
100 YR.
j WSEL 988-86
988 PRaP.Pa+n" 988
3 6 PROPOSED
a -RETAINING WAIL,
m o
= bl
984 d 984
980
-0+50 0+00 I+rn1 NT 2+50
CROSS SECTION B
luti8 - 1008
i"
1004
1000 1000
s
996996
& EXIST. 0. i
6RN
° "PROPOSED
RETAIWIG WALL
PROPOSED A
RETAINWO WALL / 1 992
100 M.POND
/ f WSEL =98886
\ — — — — `— — — — — —
988 ` - PROP. POND 988
984 984
982
-0+50 0+00 1+00 '+OG 3+00 4+00
EAST POND__
STORMWATER FACILITY MAINTENANCE AGREEMENT 14
Rev.12/29/2014
EXHIBIT "B"
CROSS SECTION C
1008 1008
1004 1004
_ EXIST.GRN0.
1000 \ ° 1000
996 `\., X 996
_PROPOSED RETUMN,WALL
RVAIRUG WALL -
992 w s 992
988 PROP POND _ 988
984 984
980
—0+50 0+00 1+00 2+00 5+50
CROSS SECTION D
EXIST. GRND,
1000 I I o I Il
996 I Iu,
PROPOSED
RETAIN% WALL
PROPOSED
I _RE7
NUIN6 WALL
Weft - `a8'a.T
C � a
988 g PROP "D 988
984 984
982
-0+50 0+00 1+00 1 Zr i;;I +50
WEST POND_
STORMWATER FACILITY MAINTENANCE AGREEMENT 15
Rev.12/29/2014
EXHIBIT "B"
SCHEMATIC PLAN — DETENTION OUTFALL DETAIL
CLOGGED WSEL 989.11
10" WIDE WEIR .'f� 10D-YR WSEL
T/W=990.00 f- 988.86 '
l _1-- 1/w�a9o.t4r1
Di —
D
T/W=987.7.5 T/W=987,75
2-12' PVC PIPES 8' C-C CENTERED ON WEIR GROUTED STONE
IN F/L = 985.10 (POND SIDE) WALL
OUT FA = 985.00 (DOWNSTREAM)
(MATCH E%. GROUND)
EAST OUTFALL STRUCTURE
H , i 41 V
EAST POND
1 CLOGGED WSEL - 990.27
100-YR WSEL - -1
5 TOP=990.9
989 7
00
_0^
6„ I G. FL WEIR=988.75-,\`
RETNNING I 6.00'
I I
i I RETAINING
21�R�ounO
9
I FL=985.40 i
Pond Bottom
I I
L- -- - - - -- -- ---- - - - -- --
WEIR
- -- --WEIR OPENING DETAIL
t&OT To --Ati
WESTPOND
STORMWATER FACILITY MAINTENANCE AGREEMENT 16
Rev.12/29/2014
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 17
Rev.12/29/2014
Exhibit "D"
Stormwater Structural Maintenance CHECKLIST
FREQUENT REPAIRS REPAIRS
INSPECTION DATE REQUIRED MADE NOTES
Mowing
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
Location of Erosion
MAJOR
INSPECTIONS
Structure type and
Condition
Condition of Rip-
Ra
Berm or
Embankment
Settlement
Location of erosion
Evidence of
Animals
Evidence of Aquatic
life
STORMWATER FACILITY MAINTENANCE AGREEMENT 18
Rev.12/29/2014