HomeMy WebLinkAboutContract 47780 - PIVDCITY SECRETAIW
MAY CONTRACT �I
*%OE #
STORMWATER FACILITY
MAINTENANCE AGREEMENT
THIS AGREEMENT, made and entered into this,�Vday of ,
2016, by and between Fort Worth Independent School District, acting by and through
az�a, , hereinafter referred to as "Landowner",
d 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 10.842 acres tract located in the MOSES A. JACKSON Survey, Abstract
862, Tarrant County, Texas according to the deed recorded in Volume 1346, Page 54,
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 CHAMBERS ADDITION
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
i =T--
OFFICIAL RECORD
STORMWATER FACILITY MAINTENANCE AGREEMENT CITY SECRET,4RV
Rev.12/29/2014
FT. 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 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 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.12/29/2014
Executed this day of 20k.
Landowner City of Fort Worth
Name. Jacinto Ramos, Jr.
Assistant City Manager
Title: President, Board of Education
Approved as to Form and Legality
Assistant City Attorney /{R-rpwe M 665 Nc7—
ATTEST
ity Se eta
°�006°oo®opo
UFMCIAL RECORD,
STORMWATER FACILITY MAINTENANCE AGREEMENT UQ B Y SECRETAR u
Rev.12/29/2014F-Fu �IM'pRTAII`�t p
STATE OF TEXAS §
COUNTY OF TARRANT §
to
This instrument was acknowledged before me on AICLU �4a_%Jo by
Fernando Costa, Assistant City Manager of the City of Fort Worth, n behalf of the City
of Fort Worth.
LINDA M.HIRRLINGER M� , J2�CJ� .
p y l
i:•
%fso Notary Public,state of Texas
N..GS;P Comm.Expires 02 02 2018 Notary Public, State of Texas
Notary ID 12414474-6
STATE OF TEXAS §
COUNTY OF TARRANT §
Before me, the undersigned authority on this ,23-J- day of
20_1L, 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
and as the act of such and for the purposes and
consideration expressed in the foregoing instrument.
Notary P lic, State of Texas
Ik
fz:A �ng
• OF6o� ens
s • �fe ,• ae
BHN/II IIH1111NN
STORMWATER FACILITY MAINTENANCE AGREEMENT 6
Rev.12/29/2014
EXHIBIT "A"
DRAINAGE EASEMENT
Part of Lot 1, Block 11 R, Chambers Addition
Moses A. Jackson Survey, Abstract No. 862
City of Fort Worth, Tarrant County, Texas
DESCRIPTION, of a 4,359 square foot (0.100 acre) tract of land situated in the Moses A. Jackson
Survey, Abstract No. 862, Tarrant County, Texas; said tract being part of Lot 1, Block 11 R, Chambers
Addition, an addition to the City of Fort Worth according to the plat recorded in Cabinet A, Slide 7989
of the Plat Records of Tarrant County, Texas; said tract also being part of that tract of land described in
Deed to Fort Worth Independent School District recorded in Volume 1346, Page 54 of the Deed Records
Tarrant County, Texas; said 4,359 square foot (0.100 acre) tract being more particularly described as
follows (bearing system for this survey is based on the Texas State Plane Coordinate System — NAD
83(2011), North Central Zone 4202, based on observations made on July 6, 2015 with a combined
scales factor of 1.00012):
COMMENCING, at a 5/8-inch iron rod with yellow cap found in the north right-of-way line of I.M. Terrell
Circle South (a 50-foot wide right-of-way); said point being the beginning of a curve to the left and the
southwest corner of said Lot 1;
THENCE, in an easterly direction along said north line of I.M. Terrell Circle South and said curve,
having a central angle of 05 degrees, 45 minutes, 57 seconds, a radius of 1,048.44 feet, a chord
bearing and distance of North 77 degrees, 28 minutes, 51 seconds East, 105.46 feet, an arc
distance of 105.51 feet to the POINT OF BEGINNING; from said point continuing along said
curve an arc distance of 101.88 feet to a "+" cut in concrete found for the end of said curve;
THENCE, North 15 degrees, 18 minutes, 11 seconds West, departing said north line of I.M. Terrell
Circle South, a distance of 106.63 feet to a point for corner;
THENCE, North 74 degrees, 41 minutes, 49 seconds East, a distance of 41.00 feet to a point for corner;
THENCE, South 15 degrees, 18 minutes, 11 seconds East, a distance of 105.75 feet to a point for
corner in the said north line of I.M. Terrell Circle South; said point being the beginning of a non-tangent
curve to the right;
THENCE, in a westerly direction along said curve, having a central angle of 02 degrees, 14 minutes,
28 seconds , a radius of 1,048.44 feet, a chord bearing and distance of South 73 degrees, 28 minutes,
39 seconds West, 41.01 feet, an arc distance of 41.01 feet to the POINT OF BEGINNING;
CONTAINING: 4,359 square feet or 0.100 acres of land, more or less.
(A survey plat of even survey date herewith accompanies this description.)
The undersigned, Registered Professional Land Surveyor, hereby certifies that the foregoing
description accurately sets out the metes and bounds of the tract described.
�E.CF. TF
.c P•.•G�S7EA•.;l,9
aul ani Date .......................
PAUL DANIEL
Registered Professional Land Surveyor No. 6534 .......................
..6534 .`�
Pacheco Koch, LLC y•;oF o.;?�o
y••..•
6100 Western Place, #1001, Fort Worth TX 76107 � s ii Rv�a
(817) 412-7155
TX Reg. Surveying Firm LS-10193824
3719-15.222EX3.doc
3719-15.222EX3.dwg DCP
PAGE 1 OF 2
LEGEND
— — — — PROPERTY LINE
DRAINAGE FACILITY
PROPERTY LINE
O POINT FOR CORNER
(UNLESS OTHERWISE NOTED)
(C.M.) - CONTROLLING MONUMENT
0 25 50 100 P•O.C. - POINT OF COMMENCING
P.O.B. - POINT OF BEGINNING
GRAPHIC SCALE IN FEET
1 \ \ \ LOT 1, BLOCK 11R
CHAMBERS ADDITION
\ \ \ \ (CAB. A, SL. 7989)
FORT WORTH INDEPENDENT
\ 1 \ \ N 1Q SCHOOL DISTRICT
Q��0 (VOL. 1346, PG. 54)
to
DRAINAGE
o
EASEMENT
\ \ 0 4,359 SF
\ \ (0.100 ACRES)
+" CUT /
1 FOUND (C.M.)
30' UNDERGROUND
DRAINAGE EASEMENT to
00
(CAB. A, SL. 7989) \ \ \ � � L�6o 8�.
V- / TE UT ,
20 SANITARY SEWER EASEMENT--- \ �P O.B. Z 90
(INST. NO. D198246459)
P 0.C.
11 — a=2'14'28" �� P
Q — — x=5'45'57" R=1 048.44'
5/8-INCH IRON R=1,048.44' ' r /
3 ROD w/ YELLOW L=105.51' L=41.01 �6
N CAP FOUND (CM) I T=52.80' T=20.51'
N CB=N 77'28'51" E CB=S 73°28'39" W 8� RSP -50)
to CD=105.46' _ CD=41.01' GNPMB 1p PG. \
i
L2
o NOTES:
a
1. A metes and bounds description of even
The undersigned, Registered Professional Land survey date herewith accompanies this plat
w Surveyor, hereby certifies that this plat of (E.,OF,.Tc� of survey.
survey accurately sets out the metes and
�G`CK
RFq�
bounds of the easement tract described. 2. Bearing system for this survey is based on
the Texas State Plane Coordinate System
CPAUL DANIEL
CD PAUL 83(2011), North Central Zone 4202,
6534 based on observations made on July 6, 2015
SS
S
an
`0? O with a combined scale factor of 1.00012.
`V -- ---- — Date .�S U FiN�
a`n Registered Professional DRAINAGE EASEMENT
, Land Surveyor No. 6534
M 6100 WESTERN PLACE, SUITE 1001 PART OF LOT 1, BLOCK 11R,
FORT WORTH, TX 76107 817.412.7155 CHAMBERS ADDITION
Pacheco Koch
ro _ - TX REG. ENGINEERING FIRM F-14439 LOCATED IN THE CITY OF FORT WORTH, TEXAS
I TX REG. SURVEYING FIRM LS-10193824 MOSES A. JACKSON SURVEY, ABSTRACT NO. 862,
TARRANT COUNTY, TEXAS
QORAt17U BY CHECKED BY SCALE DATE JOB NUMBER PAGE 2 OF 2
� DCP PMD
-F
"=50' FEB. 2016 3719-15.222
3719-15.222Ex3.txt
North: 6958620.0331' East: 2331422.4476'
Segment #1 . Line
Course: N15° 18' 11"W Length: 106.63'
North: 6958722.8824' East: 2331394.3054'
segment #2 . Line
Course: N74° 41' 49"E Length: 41.00'
North: 6958733.7033' East: 2331433.8516'
Segment #3 . Line
Course: S15' 18' 11"E Length: 105.75'
North: 6958631.7028' East: 2331461.7617'
Segment #4 . Curve
Length: 41.01' Radius: 1048.44'
Delta: 2°14'28" Tangent: 20.51'
Chord: 41.01' Course: S73° 28' 39"W
Course In: N17° 38' 36"W Course Out: s15° 24' 07"E
RP North: 6959630.8260' East: 2331143.9892'
End North: 6958620.0399' East: 2331422.4450'
Perimeter: 294.39' Area: 4359.22 Sq. Ft.
Error Closure: 0.0073 Course: N20° 55' 19"w
Error North: 0.00679 East: -0.00260
Precision 1: 40327.40
Page 1
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GRAPHIC SCALE IN FEET
o VPA/STEM ACADEMY
Pacheco Koch 6100 WESTERN PLACE, SUITE DETENTION POND
FORT WORTH, TX 76107 817.412.412.7155
' TX REG. ENGINEERING FIRM F-469 LOT 1R, BLOCK 1 1 R &
'.j DALLAS . FORT WORTH . HOUSTON TX REG. SURVEYING FIRM LS-100080-01 LOT 1R, BLOCK 15 CHAMBERS ADDITITION
Cn LOCATED IN THE CITY OF FORT WORTH, TEXAS
> DRAWN Bl' I CHECKED 81' SCALE DA TE JOB NUMBER
MOSES A. JACKSON SURVEY, ABSTRACT NO. 862,
POS TSR 1"=30' 02/09/16 3719-15.222 TARRANT COUNTY, TEXAS
DWG FILE: 3719-15.222GRAD.DW
EKHMIr " oda° OFTEH'TMH CROSS sEC7H0H
EXISTING GROUND
z
�I-ISI- I � III -ill III IIIA I .
2.5' (T .P.)
26'
CD
0
PROPOSED 84"
0
UNDERGROUND
DETENTION SYSTEM
SECTION A-A (TYP.)
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oVPA/STEM ACADEMY
'j Pacheco Koch 6100 WESTERN PLACE, SUITE 1001 DETENTION POND
FORT WORTH, TX 76107 817.412.7155 LOT 1 R, BLOCK 1 1 R &
I TX REG. ENGINEERING FIRM F-469
J DALLAS . FORT WORTH HOUSTON TX REG. SURVEYING FIRM LS-100080-01 LOT 1R, BLOCK 15 CHAMBERS ADDITITION
cnLOCATED IN THE CITY OF FORT WORTH, TEXAS
> DRAWN BY CHECKED BY SCALE DA TE JOB NUMBER
W MOSES A. JACKSON SURVEY, ABSTRACT NO. 862,
POS TSR NTS 02/09/16 1 3719-15.222 TARRANT COUNTY, TEXAS
DWG FILE: 3719-15.222STRM1.D1
EXISTING GROUND
z
-III
91'
PROPOSED 24"
STORM DRAIN
PROPOSED 24"
N
OUTFALL
N
N
lf]
PROPOSED 84"
UNDERGROUND DETENTION
SYSTEM @ 0.30%
SECTION B-B
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6100 WESTERN PLACE, SUITE 1001
VPA/STEM ACADEMY
lPacheco Koch
FORT WORTH, Tx 76107 817.412.7155 DETENTION POND
I1 TX REG. ENGINEERING FIRM F-469 LOT 1R, BLOCK 1 1 R &
! DALLAS FORT WORTH . HOUSTON TX REG. SURVEYINGFIRM LS-100080-01 LOT 1R, BLOCK 15 CHAMBERS ADDITITION
LOCATED IN THE CITY OF FORT WORTH, TEXAS
w DRAWN BY CHECKED BY SCALE DATE TJOB NUMBER MOSES A. JACKSON SURVEY, ABSTRACT NO. 862,
POS TSR NTS 02/09/16 3719-15.222 TARRANT COUNTY, TEXAS
DWG FILE: 3719-15.222STRM1.D1
'f o 4D o d 4D o D o p 0
1 STA 0+74.93 LINE "ST-4"
I CONNECT TO UNDERGROUND
DETENTION SYSTEM. REF.
1 SHEET C4.13
FL 84"=538.82 (S)
1 FL 84"=538.82 (E)
FL 24"=538.82 (W)
I 1
I
PROP 7
0S, ORM e .
1 0
DETENTION
EASEMENT
1 � 0
\1 \
n, f
A0 .0 0.o
N �
1 STA 0+00.00 LINE "ST-1"
" CONNECT TO UNDERGROUND
IL
DETENTION SYSTEM. REF.
SHEET C4.13
o FL 24"=544.13 (E)
m1 FL 84"=539.13 (W)
1 ` FL 84"=539.13 (N)
Ln
N 0 15 30 60 A<<�,�!
GRAPHIC SCALE IN FEET � s/s A
CD
o
Pacheco Koch 6100 WESTERN PLACE, SUITE 1001 VPA/STEM ACADEMY
1 FORT WORTH, TX 76107 817.412.7155 DETENTION POND
ii TX REG. ENGINEERING FIRM F-469 LOT 1 R, BLOCK 11R &
DALLAS . FORT WORTH . HOUSTON TX REG. SURVEYING FIRM LS-100080-01 LOT 1R, BLOCK 15 CHAMBERS ADDITITION
cn LOCATED IN THE CITY OF FORT WORTH, TEXAS
> DRAWN BY 1 CHECKED BY SCALE DATE JOS NUMBER
w MOSES A. JACKSON SURVEY, ABSTRACT N0. 862,
POS TSR 1"=30' 02/09/16 3719-15.222 TARRANT COUNTY, TEXAS
DWG FILE: 3719-15.222STRM1.D1
EKHMIr "W" - DC TEWTODH OL CUU rODOID
METHODOLOGY: METHODOLOGY: METHODOLOGY:
1 YEAR STORM EVENT 5 YEAR STORM EVENT 100 YEAR STORM EVENT
WEST DETENTION FACILITY WEST DETENTION FACILITY WEST DETENTION FACILITY
Quowna�= EXISTING DRAINAGE AREA QuEow��= EXISTING DRAINAGE AREA QnuowAe�= EXISTING DRAINAGE AREA
QA.iowAo�E= CA IA Qnuowa�E= CA IA Q:i'.-�E= CA IA
CA =0.64 CA -0.64 CA -0.64
1 =4.06 ' =5.74 1 =9.24
A =9.80 A =9.80 A
Q.uowie,F=25.46 CFS QAu_=36.00 CFS Q.u_=57.95 CFS
Q""' =18.44 CFS Q- =26.07 CFS Q- =41.97 CFS
QA =7.02 CFS QA =9.93 CFS QA =15.98 CFS
T =J2CAab - b T - b T =J2?�ab - b
QA QA QA
C =0.89 C =0.89 C -0.89
A =2.48 A =2.48 A =2.48
a =95.835 a =170.810 a =322.07
b =13.425 b =19.435 b =24.388
Ta =15.01 MIN Te =18.98 MIN Ta =22.19 MIN
VPRE- =60[CAa - �(2CabAQA) + (QA/2)(b-tc)] VPRE- =60[CAa - \(2CabAQA) + (QA/2)(b-tc)] V,-E =60[CAa - \(2CabAQA) + (QA/2)(b-tc)]
tc =10 MIN tc =10 MIN tc =10 MIN
V-U. =1,429 CF V,- =2,542 CF V-- =4,885 CF
VvA. =VP REuv- pea/pm V.- =VPREly r p,80/Pro V- P-/pro
P,ao -1.77 Peso =2.94 P-
P* =0.83 Pro =1.37 PEo
VvA* =3,047 CF V.A. =5,441 CF V.A. =10,683 CF
OUTFALL VELOCITY(V) = 2.23 FT/SEC OUTFALL VELOCITY(V) = 3.16 FT/SEC OUTFALL VELOCITY (V) = 5.09 FT/SEC
STAGE V. DISCHARGE STAGE V. STORAGE
18 12000
16 w 10000
14 Lu
L 12 8000
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VPA/STEM ACADEMY
Pacheco Koch 6100 WESTERN PLACE, sulrE DETENTION POND
FORT WORTH, TX 76107 817.412.412.7155 LOT 1 R, BLOCK 1 1 R &
1 TX REG. ENGINEERING FIRM F-469
DALLAS . FORT WORTH . HOUSTON TX REG. SURVEYING FIRM LS-100080-01 LOT 1R, BLOCK 15 CHAMBERS ADDITITION
LOCATED IN THE CITY OF FORT WORTH, TEXAS
> DRAWN BY I CHECKED BY SCALE DATE ✓OB NUMBER
w MOSES A. JACKSON SURVEY, ABSTRACT NO. 862,
TSR JCM NTS 04/07/16 3719-15.222 TARRANT COUNTY, TEXAS
DWG FILE: 3719-15.222STRM1.D1
C���1000� aDo �°D � pLaMO�]C� pL�La�]
I1
1 � I
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I
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GRAPHIC SCALE IN FEET
0
o VPA/STEM ACADEMY
Pacheco Koch 6100 WESTERN PLACE, SUITE DETENTION POND
FORT WORTH, TX 76107 817.412.412.7155 LOT 1 R, BLOCK 11R &
I TX REG. ENGINEERING FIRM F-469
`.� DALLAS . FORT WORTH . HOUSTON TX REG. SURVEYING FIRM LS-100080-01 LOT 1R, BLOCK 15 CHAMBERS ADDITITION
Cn LOCATED IN THE CITY OF FORT WORTH, TEXAS
> ORAwN BY CHECKED BY SCALE OA TE JOB NUMBER MOSES A. JACKSON SURVEY, ABSTRACT NO. 862,
[ifPOS TSR 1"=30' 02/09/16 3719-15.222 TARRANT COUNTY, TEXAS
DWG FILE: 3719-15.222GRAD.DW
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.12/29/2014
C N T E C H
ENGINEERED SOLUTIONS
Inspection & Maintenance Guide for
Corrugated Steel Pipe Underground Detention Systems
Safety: Before entering into any storm sewer or underground detention system check to
make sure all OSHA and local safety regulations and guidelines are observed during the
maintenance process. Hard hats, safety glasses, steel-toed boots and any other appropriate
personal protective equipment shall be worn at all times.
Frequency: Inspections shall be completed annually.
Inspection Check List:
Check quality of parking lot surface.
• Is there evidence of potholes or sinkholes?
• Is there evidence of an unusual amount of silt and soil build-up on the surface?
Check for pipe symmetry(uniform curvature).
• Flexible steel pipe is designed to handle minor deflections. Pipe structures deflected
more than 7% from design shape, or those that show localized distortions may
require further investigation.
Check for pipe ioint quality.
• Is there evidence of backfill material infiltrating into the pipe structure?
Check for proper operation of outlet structure.
• Is the outlet drainpipe clogged?
• In dry conditions, has the system drained to the elevation of the lowest outlet pipe.
Silt Deposition
• If accumulated silt is interfering with the operation of the detention system (i.e.:
blocking outlet pipe or if silt deposition has significantly reduced the storage capacity
of the system) it should be removed. This can be accomplished by the use of a "clam
shell' device or vactor truck.
Maintenance:
Underground storm water detention and retention systems should be inspected at regular
intervals and maintained when necessary to ensure optimum performance. The rate at
which the system collects pollutants will depend more heavily on site activities than the size
or configuration of the system.
Inspection
Inspection is the key to effective maintenance and is easily performed. CONTECH
recommends ongoing quarterly inspections of the accumulated sediment. Sediment
deposition and transport may vary from year to year and quarterly inspections will help
insure that systems are cleaned out at the appropriate time. Inspections should be
performed more often in the winter months in climates where sanding operations may lead
to rapid accumulations,or in equipment washdown areas. It is very useful to keep a record of
each inspection. A sample inspection log is included for your use.
Systems should be cleaned when inspection reveals that accumulated sediment or trash is
clogging the discharge orifice. CONTECH suggests that all systems be designed with an
access/inspection manhole situated at or near the inlet and the outlet orifice. Should it be
necessary to get inside the system to perform maintenance activities, all appropriate
precautions regarding confined space entry and OSHA regulations should be followed.
Cleaning
Maintaining an underground detention or retention system is easiest when there is no flow
entering the system. For this reason, it is a good idea to schedule the cleanout during dry
weather.
Accumulated sediment and trash can typically be evacuated through the manhole over the
outlet orifice. If maintenance is not performed as recommended, sediment and trash may
accumulate in front of the outlet orifice. Manhole covers should be securely seated
following cleaning activities.
Inspection&Maintenance Log:
Diameter System Location: Anywhere, USA
Date Depth of Accumulated Maintenance Maintenance Comments
Sediment Trash Performed Personnel
12/01/99 2" None Removed B. Johnson Installed
Sediment
Removed Swept
03/01/00 1" Some Sediment and B. Johnson parking lot
Trash
06/01/00 0" None None
09/01/00: 0" Heavy Removed Trash S. Riley
12/01/00 1" None Removed S. Riley
Sediment
4/01/01 0" None None S. Riley
Removed ACE
04/15/01 2" Some Sediment and Environmental
Trash Services
Inspection& Maintenance Log:
" Diameter System Location:
Date Depth of Accumulated Maintenance Maintenance Comments
Sediment Trash Performed Personnel
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.12/29/2014
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.12/29/2014
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