HomeMy WebLinkAboutContract 52844 CITY SECRETARY
CONTRACT NO. 5aN L{
DOE #
RECEN��
SEP 2 6 2019
c��vo�FOA�woxTtt STORMWATER FACILITY
��r(SECRA�Y MAINTENANCE AGREEMENT
AAll�
THIS AGREEMENT, made and entered into thisVday of ,
OUf c , by and between D.R. , Horton—Texas, Ltd., a Texas Limited Partnership, acting
by and through D.R. Horton — Texas, Ltd., a Texas Limited Partnership, hereinafter
referred to as "Landowner", the Homeowners Association of Twin Mill Farms, Inc.,
hereinafter referred to as "Association" 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 34.256 acre tract located in the B. Thomas Survey, Abstract 1497, Tarrant
County, Texas according to the deed recorded in D216260272, 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 Twin Mills Phase 4 hereinafter
called the "Plan", which is expressly made a part hereof, as approved or to be approved by
the City and the Landowner and Association provides for management of Stormwater
within the confines of the Property; and
WHEREAS, the City and the Landowner and Association, 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
OFFICIAL RECORD
STORMWATER FACILITY MAINTENANCE AGREEMENT CITY SECRVARY
Rev.1111712016
FT. WORTH,TX
WHEREAS, the City requires that on-site Stormwater Management Facilities
("Facility") as shown on the Plan be constructed and adequately maintained by the
Landowner, its successors and assigns, including Association, the location and dimensions
of which is shown and more particularly described by metes and bounds in the attached
Exhibit"A" ("Facility Property"); and
WHEREAS, Landowner agrees to convey the Facility Property to the Association
and the Association agrees to accept the Property where the Stormwater Facility is
located.
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 and Association, 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 and Association, 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 Facilities, berms, outlet structure, pond areas,
STORMWATER FACILITY MAINTENANCE AGREEMENT 2
Rev.11/17/2016
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 and Association, its successors and assigns, hereby grant
permission to the City, its authorized agents and employees, to enter upon the
Property and to inspect the Facility Property whenever the City deems
necessary. The purpose of inspection is to follow-up on reported deficiencies
and/or to respond to citizen complaints. The City shall provide the Landowner,
its successors and assigns, copies of the inspection findings and a directive to
commence with the repairs if necessary.
4. In the event the Landowner and the Association, 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 and the Association, 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 or the Association. Such lien shall be perfected by
filing in the office of the County Clerk of Tarrant County, Texas an affidavit
STORMWATER FACILITY MAINTENANCE AGREEMENT 3
Rev.1111712016
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 AND ASSOCIATION AGREES TO HOLD THE CITY
HARMLESS FROM ANY LIABILITY IN THE EVENT THE FACILITY
FAILS TO OPERATE PROPERLY. LANDOWNER AND
ASSOCIATION COVENANT AND AGREE AND DOES HEREBY
INDEMNIFY HOLD HARMLESS AND DEFEND THE CITY OF FORT
WORTH, ITS AGENTS, SERVANTS AND EMPLOYEES FROM AND
AGAINST ALL COSTS, EXPENSES, LOSSES, DAMAGES, CLAIMS
OR CAUSES OF ACTION WHATSOEVER ARISING, OR WHICH
MIGHT ARISE, FROM THE FAILURE OF LANDOWNER OR ANY
FUTURE OWNERS OF THE 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; OR FAILURE TO PERFORM ANY
OTHER DUTIES OR OBLIGATIONS HEREUNDER.
7. Landowner and Association 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 and
Association 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
STORMWATER FACILITY MAINTENANCE AGREEMENT 4
Rev.11/17/2016
on the Landowner, its administrators, executors, assigns, heirs and any other
successors in interests, including any property owners association.
9. Notwithstanding anything to the contrary contained or implied elsewhere
herein, it is expressly agreed and understood that the liabilities, indemnities and
obligations of D.R. Horton — Texas, Ltd., a Texas Limited Partnership as
Landowner hereunder shall expire and be of no further force or effect upon the
transfer ("Transfer") by D.R. Horton - Texas, Ltd., a Texas Limited
Partnership to the Association of legal title to the Facility Property, save and
except for any liabilities, indemnities and obligations of D.R. Horton — Texas,
Ltd., a Texas Limited Partnership as Landowner hereunder which have accrued
and are due, payable and/or performable as of the date of the Transfer and
which shall expressly survive the Transfer.
q
Executed this day of 01f
Landowner C�
D. R. Horton-Texas, Ltd. City of Fort Worth
b/
0y: amin M. Clark, CA-,�pa
Assistant Vice President of Assistant City Manager
D. R. Horton, Inc
Approved as to Form and Legality
Association
Homeowners Association of Twin Mill
Farms, Inc., a Texas property owners Assistant City Attorne
assoc'
,,. �Y, t;
ATTEST ,e� ,�" ,c
gamin M. Clark
Authorized Representative pursuant to tp
assignment recorded as Doc.No.
D216257713, Tarrant County Records
CAy S61W
OFFICIAL RECORD
CITY SECRETARY
STORMWATER FACILITY MAINTENANCE AGREEMENT F'�° 9A/®�f'Le �g
Rev.11/17/2016 V V [YY H,TX
STATE OF TEXAS §
COUNTY OF TARRANT §
This instrument was acknowledged before me on 6�l
Assistant City Manager of the City of Fort orth, on behalf of the City
of Port Worth.
Ph MARIAS.SANCHEZ
* My Notary ID n 2256490
n' Not Public tate o Texas
Expires December 19,2021 ry
STATE OF TEXAS §
COUNTY OF TARRANT §
This instrument was acknowledged before me on 5W-/y/nA l�3 2019
by Benjamin M. Clark, Assistant Vice President of D. R. Horton, Inc., a Delaware
corporation, acting on behalf of said corporation in its capacity as authorized agent for D.
R. Horton - Texas, Ltd., a Texas limited partnership, acting on behalf of the limited
partnership.
SHERRI A TAYLOR
Notary ID#t 5212156
My Commission Expires Notary Public, State of Texas
YX a".p June 1, 2020
STATE OF TEXAS §
COUNTY OF TARRANT §
This instrument was acknowledged before me on 2019
by Benjamin M. Clark, authorized representative, acting on behalf of Homeowners
Association of Twin Mill Farms, Inc.
''�. SHERRI A TAYLOR
Notary ID#� 5212156 Notary ublic, State of Texa
My Commission Expires
June 1, 2020
rFT.
IAL RECORD
SECRETARY
STORMWATER FACILITY MAINTENANCE AGREEMENT ���� r ��Rev.11/17/2016 Y
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.
Ashraf Ibrahim
Management Analyst II
OFFICIAL RECORD
CITY SECRETARY
FT WORTH, TX
EXHIBIT"A"
LEGAL DESCRIPTION FOR
PUBLIC DRAINAGE EASEMENT
All that certain lot, tract, or parcel of land, situated in a portion of the Benjamin Thomas Survey,
Abstract No. 1497, City of Fort Worth, Tarrant County, Texas and being part of that certain
called 60.993 acre tract of land described in a deed to D. R. Horton - Texas, Ltd recorded in
Instrument No. D216260272 of the Deed Records of Tarrant County, Texas(DRTCT), and being
more completely described as follows,to-wit:
COMMENCING at a 1/2" iron rod found for the most southerly corner of said 60.993 acre tract,
the most westerly Northwest corner of Twin Mills Addition recorded in Cabinet A, Slide 9923 of
the Plat Records of Tarrant County, Texas (PRTCT), and being in the East line of Twin Mills
Phase 1 recorded in Volume 388-189, Page 88 (PRTCT), from which a 1/2" capped iron rod
found "illegible" for the Northeast corner of Lot 27, Block 25 as shown in said Twin Mills
Addition bears North 61 deg. 24 min. 08 sec. East—592.59 feet;
THENCE North 20 deg. 21 min. 35 sec. East, a distance of 268.93 feet to the TRUE POINT OF
BEGINNING;
THENCE North 71 deg. 30 min. 53 sec. West, a distance of 14.64 feet;
THENCE North 28 deg. 35 min. 22 sec. West, a distance of 150.30 feet;
THENCE North 61 deg. 24 min. 38 sec. East, a distance of 105.00 feet;
THENCE South 28 deg. 35 min. 22 sec. East, a distance of 7.05 feet;
THENCE North 61 deg. 24 min. 38 sec. East, a distance of 105.00 feet;
THENCE South 28 deg. 35 min. 22 sec. East, a distance of 162.66 feet;
THENCE South 18 deg. 32 min. 01 sec. West, a distance of 13.61 feet to a Point of Curvature of
a non-tangent circular curve to the right, having a radius of 1175.00 feet, a central angle of 1 deg.
01 min. 57 sec., and being subtended by a chord which bears South 66 deg. 25 min. 01 sec. West
- 21.18 feet;
THENCE in a southwesterly direction along said curve to the right, a distance of 21.18 feet;
THENCE South 66 deg. 55 min. 59 sec. West tangent to said curve, a distance of 145.36 feet to a
Point of Curvature of a circular curve to the left, having a radius of 1225.00 feet, a central angle
of 1 deg. 08 min. 22 sec., and being subtended by a chord which bears South 66 deg. 21 min. 48
sec. West- 24.36 feet;
Page 1 of 3
E:\10715-Twin Mi11s\C0G0\GM EASEMENTS\DE4 LGL.docx
THENCE in a southwesterly direction along said curve to the left, a distance of 24.36 feet to the
POINT OF BEGINNING, containing 34,854 square feet or 0.800 acres of land, more or less.
Bearings are referenced to Texas State Plane Coordinate System, North Central Zone (4202),
North American Datum of 1983 as derived from GPS observation.
Exhibit map attached and made a part hereof.
.� 0
4p G1 E•.�,y
JOHN N. ROGERS
'•,.� 6372 Pv'
7/25/2018
Page 2 of 3
E:\10715-Twin Mills\COGO\GM EASEMENTS\DE4 LGL.docx
BEARINGS ARE REFERENCED � GRAPHIC SCALE 1"=100 '
TO TEXAS STATE PLANE
COORDINATE SYSTEM, \ /
NORTH CENTRAL ZONE /00 0 100 200
(4202 1, NORTH AMERICAN /
DATUM OF 1983 AS DERIVED \ '
FROM GPS OBSERVATION.
cq S 28•�5�
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92ST•JOAT
34.854 SQ. FT. /0.800 AC. '
�/ S 18.32'01' w -
13.61'
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66'25'01' W C�i.18'
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14.s4' PO ' CB ss•21' • w c=2A 36'
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EXHIBIT"A" MAP SHOWING Q
PUBLIC DRAINAGE EASEMENT,
SITUATED IN A PORTION OF THE o
BENJAMIN THOMAS SURVEY, ABSTRACT NO. 1497, o
CITY OF FORT WORTH, TARRANT COUNTY, TEXAS ,� 0
N
(300DIVRN< Job No.; 10715 Scale 1" = 100' Sheet ��Q�G F�O'•`r
SHIAL][, 3 JOHN N. ROGERS 3
Drafted i B.A.J. Checked i J.N.R.
CML ENGINEERS--PLANNERS--SURVEYORS
Surveyed on the Ground, 03/2i/2017
2405 Mustang DrMe,Grapevine,Texas 76051 of (� •..,,. r-
Metro(817)329-4373 Date Prepared 1 07/23/2018 stay
TBPE REGISTRATION#E F-2944 3 w
TBPLS#E 100217W Revised i Revised 1 Date Signed i 7/25/2018
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POND B DISCHARGE SUMMARY
INFLOW (cfs ) OUTFLOW (cfs l STORAGE (ac.ft. ) W.S. ELEV
1—year 29 .2 9.6 0.7 803 .2
5—year 46 .3 14 .7 1 .3 804 .4
100—year 65 .6 22 .8 1 2 .9 807 .0
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0 Req'd = 22.8 cfs
0 Prov'd = 22.8 cis o NTS V= 5.3 fps
V= 7.3fps - sf = 0.35%
sf = 0.54Z
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HEC-RAS Model Plan:Emergency Spillway 9/7/2018
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SHEET 3 OF 5
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Pond Report
Hydratbw Hydrographs Extension for AutoCADa CWB 3DFi 2018 by Autodesk,Inc.A 2 Saturday,05 126 12018
Pond No.1- POND B
Pond Data
Pond storage is based on user-defined values.
Stage/Storage Table
Stage(R) Elevation(R) Contour area(sgft) Incr.Storage(cuR) Total storage(cuR)
0,00 801.25 Na 0 0
0.25 801,50 ala 176 176
0.75 802.00 We 5,223 5,399
1.25 802.50 nfa 9.347 14,746
1,75 803.00 n1a 9,928 24,674
2.25 903,50 file 10,496 35.170
215 804.00 Na 11.071 46.241
3,25 804.50 Na 11,659 57.900
3.75 805,00 nla 12.262 70,162
4.25 805.50 file 12,896 83.058
4.75 806.00 file 13,557 96.615
5.25 806.50 n/e 14,236 110.851
5.75 807.00 We 14,942 125,793
6.25 807.50 We 17.313 143,106
8.75 808.00 We 25.293 168,399
Culvert!Orifice Structures Weir Structures
[A] [B] [C] (PrfRsr) [A] [B] [C] [D]
Rise(in) = 24.00 0.00 0.00 0.00 Crest Len(ft) Inactive Inactive 0.00 0.00
Span(in) = 24.00 0.00 0.00 0.D0 Crest El.(ft) = 0.._ 0.00 0,00 0.D0
No.Bartels = 1 0 0 0 Weir Coen. 3.33 1.62 3.33 3,33
O Invert EL(ft) 901.25 0.00 0.00 0.00 We Type - - - -
N Length(R) 324.00 0.00 0.00 0.00 Multistage = Yes Yes No No
0) Slope(%) = 0.22 0.00 0.00 n/a
O N-Value = .013 .013 .013 nfa
Orifice Coeff. 0.60 0.60 0.60 0.60 Exf l.(infhr) = 0.000(by Wet area)
O Multi-Stage = Ma No No No TW Elev.(ft) = 0.00
- eea.:CukvrL W� mAe y.w*msd mdw hW(w).w m0d(=)o>�.Mk 6s d,.e,ed fonds.cordke .h wr
)-daft-y (s1
Stage!Storage/Discharge Table
Stage Storage Elevation Clv A Clv B Clv C PrfRsr Wr A Wr B Wr C Wr D Exfil User Total
t1 ft cuR ft cfs cfs cfs cfs cfs cis cfs cfs cfs eft cis
W
U) 0,00 0 801.25 0.00 - --- -- __ - - - 0.000
N 0,25 176 801.50 0.34 oc - - - - - - - - - 0.345
0.75 51399 $02.00 2.82 oc - - - - -- - -- - 2.819
1.25 14.746 802.50 6.34 oc - - - -• - - - 6.335
1.75 24.674 903.00 9.19 oc - - - - - - - - - 9.194
O 2.25 35,170 $03,50 10,55 oc - - - - - - - - - 10.55
a 2.75 45,241 804,00 13,01 oc - - - - - -- - - - 13.01
325 57.900 804.50 15.07 oc -- »- - - 15.07
Ct 3.75 70,162 805.00 16.98 oc - - - -- - -• 16.88
N 4.25 83,058 805.50 18.51 oc - - - - - - - - - 18.51
u) 4.75 96,615 806.00 20,02 oc - - - - - - - - - 20.02
0 5.25 110,851 806.50 21.41 oc - - - -_ - -- - - 21.41
L 5.75 125.793 $07.00 22.72 oc - - - - - - 22.72
CL 6.25 143.106 $07.50 23.96 oc - - - - - - - - - 23.96
1 6.75 168,399 808.00 25,14 oc - - - - - - -• - - 25,14
C
Project: Twin Mills Simulation Run: 100-YR PROPOSED
Reservoir. Pond B
C Start of Run: 27Dec2016,12:00 Basin Model: Proposed Condition
o End of Run: 28Dec2016,12:00 Meteorologic Model: 100-yr
a_ Compute Time:23May2018.11:51:33 Control Specifications: Control 1
Volume Unts:IN
C
3 Computed Results
Peak Inflow: 85.6(CFS) DatejTin*of Peak Inflow: 28Dec2016,00:14
Peak Discharge: 22.8(CFS) DatejTin of Peak D'Wvrge28Dec2016,00:42
Ln Inflow Volume: 8.18(IN) Peak Storage: 2.9(AC-Fr)
r- Discharge Volume8,13(IN) Peak Eimbon: 807.0(FT) ��cyTr TrTrm�rlll llll�
o
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SHEET 4 OF 5
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DETENTION SUMMARY POND B
A DETENTION FACILITY HAS BEEN DESIGNED TO SERVE THE PROPOSED
TWIN MILLS PHASE 4 DEVELOPMENT. IN ORDER TO REDUCE THE PEAK
FLOWS GENERATED BY THE DEVELOPMENT BASIN "B-4' (RATIONAL
METHOD 'B-l' , 'B-2' , 'B-3' 8 'B-4 " ) WILL DRAIN TO DETENTION
POND 'B '. POND 'B ' WILL THEN OUTFALL BY MEANS OF A 24' DIAMETER
PIPE THAT WILL CONNECT TO EXISTING S.D. LINE "B' DOWNSTREAM
CONSTRUCTED WITH TWIN MILLS PHASE 2, SECTION 3A FILE NUMBER
(W-14(53 ).
THE DETENTION ANAL YSIS WAS PERFORMED UTILIZING THE U.S. ARMY
CORPS OF ENGINEERS NEC-HMS v4.2 UNIT HYDROGRAPN COMPUTATION
PROGRAM USING SCS METHODOLOGY. A NYDROGRAPH WAS GENERATED
FOR THE DRAINAGE AREA BEING DETAINED AND THEN ROUTED
THROUGH DETENTION POND 'B '.
THE 100-YEAR DISCHARGE FROM THE PROPOSED POND HAS BEEN
CALCULATED TO BE 22.8 CFS. REFER TO THE FINAL ISWM FOR
DETAILED CALCULATIONS AND ANALYSIS OF THE DOWNSTREAM
SYSTEM CAPACITY.
GD
0
N
M LANDSCAPE NOTES
o I. THE OWNER SHALL BE RESPONSIBLE FOR THE ESTABLISHMENT, MAINTENANCE,
AND VIGOR OF PLANT MATERIAL IN ACCORDANCE WITH THE DESIGN INTENT AND
�0 AS APPROPRIATE FOR THE SEASON OF THE YEAR.
2. LANDSCAPE AND OPEN AREAS SHALL BE FREE OF TRASH, LITTER, AND WEEDS.
3. NO PLANT MATERIAL SHALL BE ALLOWED TO ENCROACH ON R.O. W. ,
SIDEWALKS, OR EASEMENTS TO THE EXTENT THAT VISION OR ROUTE
o OF TRAVEL FOR VEHICULAR, PEDESTRIAN, OR BICYCLE TRAFFIC IS IMPEDED.
a
� 4. TREE MAINTENANCE SHALL BE IN ACCORDANCE WITH THE STANDARDS
(D OF THE INTERNA TIONAL SOCIETY OF ARBORICUL TORE.
U)
0
a 5. TREE STAKING MATERIALS, IF USED, SHALL BE REMOVED AFTER
i (l ) GROWING SEASON, NO MORE THAN (l ) YEAR AFTER INSTALLATION
N (STEEL TREE STAKES, WIRES, AND HOSES ARE PROHIBITED ).
6. REMO VE TRASH, SEDIMENT, OR DEBRIS FROM POND AREAS S. THE
PONDS ARE DESIGNED TO ACCUMULATE SEDIMENT. REMOVE SEDIMENT
~ WHEN THE DEPTH REACHES 8 TO /0 INCHES. REPAIR DISTURBED AREA
i
WITH SEED AND STRAW.
0
i 7. MOW GRASS TO A HEIGHT NO LOWER THAN 4 INCHES IN THE BOTTOM
AND SIDE OF PONDS AND DRAINAGE DITCHES. REMOVE GRASS CLIPPINGS AND
LEA VES.
8. DISPOSE OF ACCUMULATED SEDIMENT, TRASH, AND DEBRIS IN A MANNER
THAT IS PERMITTED BY THE LOCAL, STATE, AND FEDERAL REGULATIONS.
0
0 EHT B
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SHEET 5 OF 5
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Exhibit "C"
CITY OF FORT WORTH STORMWATER FACILITY
OPERATION AND MAINTENANCE PLAN
The only responsibility the City of Fort Worth has in the operation and
maintenance of this Facility is inspection.
General Maintenance Procedures
The structural and functional integrity of the Facility shall be maintained at all
times by removing and preventing drainage interference, obstructions, blockages,
or other adverse effects into, through, or out of the system.
Periodic silt removal shall occur when standing water conditions occur or the
pond's storage volume is reduced by more than 10%. Silt shall be removed and
the pond/basin returned to original lines and grades shown on the approved
engineering plans. In addition, corrective measures are required any time a basin
does not drain completely within 72 hours of cessation of inflow. NO STANDING
WATER IS ALLOWED in basins designed for dry detention purposes.
Accumulated litter, sediment, and debris shall be removed every 6 months or as
necessary to maintain proper operation of the basin. Disposal shall be in
accordance with federal, state and local regulations.
Detention facilities shall be mowed monthly between the months of April and
October or anytime vegetation exceeds 12-inches in height.
To prevent debris from entering and clogging the downstream storm sewer
system a wire mesh screen or similar screening device shall be installed over the
outlet until final acceptance.
4. PREVENTIVE MAINTENANCE/INSPECTION
• Visual inspections of all components will be conducted every 6 months.
• A log shall be kept of maintenance actions, and inspections. The log
should document the condition of the detention system's primary
components, mowing, and silt, litter and debris removal dates. Document
aeration of the basin bottoms and replanting to prevent the sealing of the
basin bottom.
• Written maintenance and repair records shall be maintained by the
party or parties signing the attached Agreement and shall be provided
to the City upon request.
STORMWATER FACILITY MAINTENANCE AGREEMENT
Rev.11/17/2016
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
uard
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.11/17/2016
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
FORT WORTH FwAo 040
stofmwnter
INSPECTION CHECKLIST FOR SIMPLE DETENTION BASIN
Facility Name: Facility Agreement Number:
Basin/Pond Number: Inspected By: Date:
Type of Inspection:Annual Quarterly Monthly_, Routine_,or Storm Event_, (#days since event )
Basin Conditions:
1. Is there standing water or wet spots? Yes_No_Comments
2. Does sides or bottom show signs of erosion,settling,cracking,etc? Yes_No_Comments
3. Does dam or emergency spillway show signs of erosion,settling,
cracking,or other problems? Yes_No_Comments
4. Is there evidence of animal burrowing in dam? Yes_No_Comments
5. Is there evidence of changes in shape or volume of basin? Yes_No_Comments
6. Do vegetated areas need mowing? Yes_No_Comments
7. Are there trees or woody growth in dam? Yes`No_Comments
8. Are there areas that need to be re-vegetated? Yes_No_Comments
9. Is there any accumulation of silt,trash,debris or litter in the basin? Yes_No_Comments
10.Are there any other basin maintenance activities needed? Yes—No_Comments
Structural Components:
1. Are pipes,channels,trash racks,etc.free of obstructions? Yes_No_Comments
2. Are pipes,spillway or trash racks in need of repair? Yes_No_Comments
3. Is the low flow or trickle channel in need of repair? Yes_No_Comments
4. Is the outfall channel in need of repair? Yes_No_Comments
5. Are there any other structural maintenance activities needed? Yes_No_Comments
Plan for correcting deficiencies: Signature:
Owner's Representative
Date:
Form CFW-6
CFW-SEPTEMBER 2015 Appendix A A-17