HomeMy WebLinkAboutContract 42292 (2) Date Received: 12/20/22 Permit No.: SWFMA-22-0082
Time Received: 12:24 p.m. City Secretary No.: 42292-A1
AMENDMENT
TO CITY SECRETARY CONTRACT NO.42292
STORMWATER FACILITY MAINTENANCE AGREEMENT
This AMENDMENT TO CITY SECRETARY CONTRACT NO. 42292,
STORMWATER FACILITY MAINTENANCE AGREEMENT("AMENDMENT")is made
and entered into by and between the CITY OF FORT WORTH,a municipal corporation of Tarrant
County,Texas,acting herein by and through its duly authorized City Manager or duly designated
Assistant City Manager, hereinafter referred to as the "City", and Harmony Public Schools
"Landowner", acting herein by and through its duly authorized representative Dr.Nihat Bayhan
as Deputy Superintendent.
RECITALS
WHEREAS, the City and Landowner made and entered into City Secretary Contract No.
42292 (the "Agreement") requiring the construction and maintenance of certain on-site stormwater
management facilities(the"Facility")on a portion of the Property as defined within the Agreement;
WHEREAS,the Agreement was recorded with the property records of the Tarrant County as
Document No. D2 1 1 242646 which is one and the same as City Secretary Contract No.42292;
WHEREAS,the Landowner's company name was originally filed under the Texas Secretary
of State ("SOS") as Cosmos Foundation, Inc. at the time of execution of the Agreement, however
shortly after the Agreement was executed, the Landowner changed its name to Harmony Public
Schools via an entity name change form posted on the SOS website;
WHEREAS,through preparing this Amendment it was revealed that the Landowner,at the
time the Agreement was executed in 2011, was not the owner of the Property identified under the
Agreement at the time of execution, however the Landowner did have a property interest in the
property;
OFFICIAL RECORD
Revised 03/0V2022 BN CITY SECRETARY page 1 of 4
FT.WORTH,TX
WHEREAS, the Property has been conveyed to the Landowner as of April of 2021.
according to Special Warranty Deed Document No. 132211123711 filed in the Deed Records of
Tarrant County,Texas resolving any ownership issues under the Agreement moving forward;
WHEREAS, the Landowner has recently approached the City requesting a building permit
for new development on the Property and has requested the City to consider certain location and
design changes to the Facility that would be required to support the new development;and
WHEREAS, it is advisable to execute this Amendment to the Agreement to revise exhibit
"B" in the Agreement to depict design changes to the Facility necessary to support the new
development.
NOW THEREFORE, City and Landowner, acting herein by and through their duly
authorized representatives,enter into the following that amends the Agreement:
1.
Exhibit`B" is hereby replaced with Exhibit"13-1"attached hereto and incorporated herein
to the Agreement,consisting of revised design specifications of the Facility.
2.
This Amendment shall be filed with the City Secretary as an amendment to the Agreement
and also recorded among the land records of Tarrant County,Texas,and 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.
3.
All other provisions of the Agreement which are not expressly amended herein shall remain
in full force and effect
THE REMAINDER OF THIS PAGE INTENTIONALLY LEFT BLANK
Revised 0310 1 2 02 2 BN Page 2 of 4
EXECUTED on this the 21st day of December 20
CITY: LANDOWNER:
Harmony Public Schools
a Texas Non-Profit Corporation
bax�BccYaGu7�
Dana Burghd off(bt5c 19,20 15:05 CST)
Dana Burghdoff, By: Dr. Nihat Bayhan
Assistant City Manager Title: Deputy Superintendent
City of Fort Worth 4 `
Date: Dec 19,2022 Date: � rl 111921
Contract Compliance Manager:
Approved as to Form and Legality: By signing 1 acknowledge that 1 am the
person responsible
for the monitoring and administration of
this contract, including
Thomas Royce Hansen, ensuring all performance and reporting
Assistant City Attorney 11 requirements.
City Attorney's Office
Date: Dec 19,2022 MRq�o y bghWg;�
a44Fo atltj Janie S. Morales, Planning Manager
°°°°°°°°°.0 Development Services
�o
0� old
ATTEST:
° �
.791flmot42 S 600dka P°d a�rezas4p Date: Dec 19,2022
Jannette S.Goodall(Dec20,2022 12:24CST) �d000ao
Jannette Goodall,
City Secretary
City of Fort Worth
Date: Dec 20,2022
OFFICIAL RECORD
CITY SECRETARY
FT.WORTH,TX
Revised 03/0V2022 BN Page 3 of 4
STATE OF TEXAS §
COUNTY OF TARRANT §
This instrument was acknowledged before me on De-C �.9i OZU�� by Dana
Burghdoff, Assistant City Manager of the City of Fort Worth, on behalf of the City of Fort
Worth.
BROOKE BONNELL
Notary Public,State of Texas Wotgy Public, tare of Texas
Comm.Expires 10-11.2020
Notary 1D 134009525
LANDOWNER
STATE OF W,0/6 §
COUNTY OF §
BEFORE ME, the undersigned authority, a Notary Public in and for the State of
on this day personally appeared A111(d T ( )WfiW (name of executor) ,
(title of executor), known to me to be the person whose name is
sdbscfibedko the foregoing instrument,and acknowledged tome that he/she executed the ame fo
the purposes and consideration therein expressed,as the act and deed of
(Landowner's name),and in the capacity therein stated.
GIVEN UNDER MY HAND AND SEAL OF OFFICE this-�—day of ,20,M.
//ywv�, . !?
Notary Public, State of '— S
jA4
N �
pYF AMINE EL HIYAT
=�� =Natary Public,State of Texas
Comm,Expires 12,02.2D24
Notary ID 132807079
Revised 03/0V2022 BN Page 4 of 4
EXHIBIT A
EXHIBIT "A"
LEGAL DESCRIPTION
DETENTION POND EASEMENT
BEING 0.838 acre of'and located in the ISABEL FLORES SURVEY, ABSTRACT
NO. 507, and being a portion of the same tract of land conveyed to Hulen Acres,
L P. by the deed recorded in County Clerk's File No. D207122140 of the Deed
Records of Tarrant County, Texas. Said 0,838 acre of land being more
particularly described by metes and bounds as follows:
COMMENCING at a ''V2" iron rod marked 'Brittain & Crawford", set at the
Southwest corner of said Hulen Acres, L.P. Tract, lying in the North boundary line
of Block A, STONE MEADOW ADDITION to the City of Fort Worth, Tarrant
County. Texas, according to the plat recorded in Cabinet A, Slide 6107 of the
Plat Records of Tarrant County, Texas;
THENCE N 52" 32' 27" E 11.07 feet, to the POINT OF BEGINNING,
THENCE N 000 02' 01"W 100,00 feet, to a point;
THENCE N 890 57' 59" E 365.00 feet, to a point,
THENCE S 00" 02' 01 E 100 00 feet, to a point:
THENCE S 890 57' 59"W 365.00 feet, to the POINT OF BEGINNING
containing 0.838 acre (36,500 square feet) of land,
s
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G 20111EGALSIKH`HARMONY SCHOOL AUDITION DRAINAGE ESM r
EXHIBIT "A" �!
PROPOSED r
LOT 1• BLOCK I I
HARMONY SCHOOL
ADDITION f
/ OWNER! t1 A L.P 0207 ! r
CC/ 01071221401140
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LOT 29
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ermArow' 120ffl0�—'3
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MARGUERITE LANE
N 89"57'59"E 365.00' 1
N 00"02'01"W� T 17 365'x I00' DETENTION S 00"02'0�"E
r LOT 17
I00.00 �' POND EASEMENT Z 100.00
LOT 16
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ROD MARXVD 573ZZ�7«E 1
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STEPPING STONE DR. N I `%
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365'x 100' DETENTION
RITTAIN & CRAWFUR POND EASEMENT
1/ � LAND SURVEYING & +El
a
TOPOGRAPHIC MAPPING 0•838 ACRE OF LAND
Wl1 9IE-C211 - ML?70 (8171 4n-31'1 LOCATED IN THE I. FLORES SURVEY
=A' , rE17;vWI9 f ABSTRACT No. 507
k6. 87% ll.i 7� SIB SSX11v (riLF1pA'r
r 00k1M. :LIAS 7e'10 FORT WORTH, TARRANT COUNTY,
cuA.L'. aa�.•�oM.u1v'�•._crn.ro.c_c�r TEXAS
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Figure 3.17 Dry Detention Pond W/Pilot Channel Schematic
Harmony Elementary School Drainage Study
3.2 Hydraulic Results
The results of the hydraulic analysis show no increase greater than 0,1 at any overtopped roadway for the 1-,5-,and
100-year events,as well as no increase greater than 0 1'at any cross section in the 100-year event There are no
proposed channel velocities above 6f/s with an increase greater than 5%.
4. Hydraulic Grade Line Analysis
Hydraulic Grade Line(HGL)Analysts was performed based on current City of Fort Worth standards for the receiving
storm drain system to confirm the capacity of the existing storm drain lines within the Harmony Elementary property
and to create a tailwater curve for the pond outfall The plans for Harmony Elementary were referenced and updated
as needed to meet current standards and correct a few inconsistencies.The tailwater was updated to reflect the
updated HGL calculations from the receiving system. Drainage areas from the plans were verified for HGL
calculations The hydraulic grade line analysis demonstrated that the existing storm drain lines have capacity for the
original design discharges based on the higher tailwater and meet city criteria for storm drain design and HGL
analysis.See Table 11 for the Harmony hydraulic grade line calculations.
An HGL analysis was also performed on the storm dram line starting at the Harmony pond outfall and ending at the
pipe outfall on Stone River Trail.The calculations from the Harmony School,Columbus Heights Phase III,Stone
Meadow Addition Phase I,and Stone Meadow Phase 2B were used and updated as necessary.All of these plan sets
can be found in the supplemental data section.The rainfall intensity was calculated for the 1-,5-, 10-,25-, 50-,and
100-year storm events in order to calculate a pond tailwater curve. Since a larger range of flows was needed for the
calculations in PondPack and HMS,an HGL analysis was performed utilizing flows computed by adding 20 cfs to the
100-year discharges. For the 100 and 50-year event the design HGL was set to 834'at the upstream end of
Marguerite Lane to represent the top of curb The HGL analysis was computed for the existing and proposed
conditions to represent the updated pipe at the outfall of the pond.The hydraulic grade line analysis for the existing
and proposed tailwater curve can be seen in Table 12 and 13, respectively.The tailwater curves can be seen in
Table 14.
5. Pond Analysis
Both the existing and proposed ponds were modeled using an elevation-area table and an outflow curve.The existing
pond uses a 36"culvert,as a field survey confirmed there is no restnctor plate currently on the 36"culvert.The
outflow curve table in HMS used the tailwater curve from the HGL calculat ons The proposed pond will use a 28"
orifice,as a restrictor plate will be necessary to lower the pond outflow below existing conditions The orifice was
modeled in PondPack using the tailwater curve shown in Table 14.An outflow rating curve was generated and
entered into HMS.The PondPack model can be found in the supplemental material.The proposed pond will be
expanded to include more storage The pipe outfall will be lowered from a flowline of 827.8'to 827.5'.The existing
and proposed elevation-storage-discharge tables can be seen in Tables 15 and 16,respectively. Pond sheets are
included in the supplemental material.
The proposed pond's emergency spillway is sized to have 0.5'of freeboard when the outfall is fully clogged The
spillway will be 1'tall and 108'long.Calculations for the spillway can be seen in Table 17. Flow from the spillway will
be directed east towards S Hulen Street. Right of way capacity calculations performed in FlowMaster show that the
discharge from the spillway and the 4.4 cfs from the street in existing conditions(Plans for South Hulen Street)will be
contained in the right of way.The FlowMaster model is available in the supplemental data.
mom HALFF
Harmony Elemerlary School Drainage Study
6. Conclusion
A hydrologic analysis was performed and shows no increased discharges to any street outfalls.A 48"RCP is
proposed to take the flow from proposed basin PR 06 directly to the detention pond. By expanding the existing
detention pond located on Harmony School property and adding a 28' orifice plate,the pond will be able to hold the
proposed 100-yr discharge with a minimum 1 freeboard and release discharges below existing conditions and below
the pipe capacity There were increases in discharge to the zone of influence A hydraulic analysis showed that these
increases in discharges had no adverse impacts to Summer Creek Tributary 2,directly downstream of the ZOL A
hydraulic grade line analysis shows that the existing storm drain Imes have the capacity for the original design
discharges based on the higher tailwater and meet city criteria for storm drain design and HGL analysis.
The downstream assessment shows no adverse flooding conditions resulting from the proposed Harmony
Elementary School outfalls to the 10%rule.The downstream analysis meets all criteria outlined in the City of Port
Worth Stormwater criteria manual
son HALFF
Table 14 - Pond Tailwater Curves
Existing Tailwater Proposed Tailwater Discharge(CFS)
Elevation(ft) Elevation(ft)
827.80 827.50 0.00
828.96 828.66 18.62
829.21 828.91 26.34
829.32 829.02 29.87
832.96 832.85 34.63
834.42 834.41 38.52
834.50 834.50 42.40
835.09 835.09 62.40
Table 15 - Existing Pond Elevation-Storage-Discharge Table
Elevation (ft) Storage(AC-FT) Discharge(CFS) Notes
827.8 0.0 0.8
828 0.0 4.0
829 0.0 21.0
829.1 0.1 24.1 1-year
829.7 0.2 30.3 5-year
830 0.3 30.9
831 0.6 32.1
832 1.0 1 33.4
832.3 1.1 1 33.8 1 100-year
Table 16 - Proposed Pond Elevation-Storage-Discharge Table
Elevation(ft) Storage(AC-FT) Discharge(CFS) Notes
827.5 0.0 0
828 0.0 1.6
829 0.2 10.6
830 0.4 22.8
830.3 0.4 24.4 1-year
831 0.6 29.2
831.8 0.9 30.5 5-year
832 1.0 30.7
833 1.4 31.8
834 1.9 32.9
835 2.5 33.9 100-year
Table 17 - Proposed Pond Emergency Spillway Calculations- Q=CLH"
Q-(CFS) C-Weir Coefficient H(ft) n L(ft)
99.8 2.6 0.5 1.5 108
Height of 0.5'represents 0.5'of freeboard
Crest Elevation=835.1'
100-yr WSEL=835'
Freeboard=6"
Top of Pond Elevation=836.1'
EXHIBIT C
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 pondibasin
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 1S 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 I G
Rev.1 1 11 9120 2 0 JLE
Exhibit"D"
STORM WATER FACILITY MAINTENANCE AGREEMENT 10
Rev.09t1012012
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