Copperstone-CS 960610BriscoeClark
June 1 O, 1996
Mr. Ken Griffin
City Engineer
City o12 Coppell
255 Parkway Blvd.
Coppell, Texas 75019
Re: Dedication of the rear portion of Lots 13, 14, 15, and 16, Blk. A, Copperstone
Addition, between the North boundary of the existing 20' utility easement and the rear
property line of each Lot to the City of Coppell.
Dear Ken:
On Friday, June 7, 1996, Mike Martin and I walked the Copperstone Project in order to
determine the exact location of the additional property requested by the City of Coppell to
facilitate the construction of the trail system along Denton Creek. As a result of this
meeting Copperstone, Ltd., the owner of this property, agrees to dedicate the property
described above with the following restrictions:
a. All the costs associated with the replat of the Lots including engineering,
surveying, filing fees and city fees will be the responsibility of the City of Coppell.
b. Briscoe Clark Company, Ltd. and Copperstone, Ltd. assume no liability for the
construction of or funding for the trail to be constructed along Denton Creek.
c. City staff will handle all the presentations to DRC, Planning and Zoning and City
Council with Briscoe Clark staffused on an as needed basis.
At this same time we would also like to resolve several issues that are outstanding:
1. During our meeting of June 7th Mr. Gary Sims of the Parks Department met us
on site and reviewed the location of the access points into the Park from the Copperstone
Addition. At that time we agreed that the ramp down into the Park will be built on City
property and will be built parallel to the retaining wall. We would like to verify that the
City is in agreement with the location of this ramp. We will provide you with a drawing of
this ramp prior to construction.
2. We have agreed to construct one, 20 foot, emergency access lane at the western
end of Mattel Lane as it meets Parkway Blvd. However, to my knowledge, no City
standards exist for the construction of this type of access. Therefore we would like to
propose the following construction criteria: Uni-green type turf block system installed
over a 6" flex base with 1" of sand between the base and the turf block. We would like to
verify that the City is in agreement with both the location and the construction standards
for this emergency access lane.
3. By the end of next week we should be finished with the bridge and the
remaining paving of Parkway Blvd. At that time we would like the City to accept the
subdivision improvements and release the remaining lots for building permits. This will
allow us to meet our contractual agreement with our homebuilders as it relates to
substantial completion. The landscape and screening wall contractors will complete the
park access, pond improvements, landscaping and decorative bridge treatments within the
next 45 days and we will then be totally complete.
We are happy to work with you on the additional land needed for the Denton Creek trail
system and we appreciate your help on the clarification of these issues. It has been a
pleasure to work with such a professional staff and we anticipate Copperstone being a
long-term asset to the Coppell community.
Sincerely,
James P. Briscoe
Partner
cc: Mr. Garreth Campbell
Construction Inspector
Mr. Mike Martin
Engineer
U S.,~, '2. t~r~/Nc.
USES AND FEATURES
Erosion Control
Str~umbar~k ~ros;~r~ control with
u~its has been the subject of many
years both ;n No~h Angelica end abroad.
For example, the tuHstone unit[ installed
in 1956 to protect thc outa;do bank of u
bend on BuHalo Creek tn Er~ County, New
York e~e stiff pedorm[ng.
U,',;-g, een, with its patented interlocking
~ct,on. offers specific ~nd distinct
advantages controlling erosion et ar, d
giving soil stabilization to:
embankmentS; river and iow flow
channels; flood p~ains ~nd the shuts iines
o{ inland rivers, dykes, creeks, lakes, ponds
Ovecflow Perking
The gram,' growr, where the traHic Goes
subjected tO wheeled traffic the~ wo~,ld
othe~ise become so compacted as [o
mhibit the permeability of the moil struc:ure
t~at is necessary for the grass to survive.
'lhe nerd sk~deced green space created b~
o~cdlow parking facihty tar pa~ks,
historical sites, ~n~tltutions, univer~itV and
~chool campuses, 9o!t course~ and any
IocaIIon where public parking periodically
peaks exta.sively beyond everyday needs,
~cenic Parks
It i~ often necessary to provide err, e~ ga,'~c¥
and maintenance routes thro.gh
greenspace, parkland and irmtitubunal
COmplexes,
Because turfstone paving enables the
traffic to go where the yraS~ grows, it i5 a
suitable product fat fire routes which,
because of landscaping considerations,
must remain greenspa¢¢.
Composition and Manufacture
Uni-Green is made ~rom ~ no sh~rr, p
¢¢nGrele mix co,'npr,sed o~ O n3n3 { 1/~ ')
have a compreasrve 3trength of 2000 p~,
¢ water ~b6orpt~on max;mum of ~'~ and a
freeze th~w resistance equ~ ~o 3ec~ion 8
of ASTM C 67-73 o, CSA A82, ~-~967
Inatallation
Erosion Control applications require the
slope tc be gladed unite:rely !ideally to a
2:1 or more gentle slope) b,gfor~- bedding
the LJni-green units in e thin layer cf sand.
In order to provera the migrado~ of fine
to place a man.made filter on the graded
~lupe before appw;ny the beddi,,w
of ~and. If such is the ca~e. the filter fabric
should permit revegetatlon
In order [o suppo~ g,ass or pla~t
the interstices must be filled to within
15 mint %" below their suffice with
&ui~able topsoil Or mixture of salt ar, d
fe~ilizer. Then the openings arc
sprigged or plugged
~Jh~n in~telled as a pavemmit,
unstable or unconsolMated subgrade
material shall be excavated according to
the direction of the Site
A, cl',itect / Landscape A, cMte( t a nd
compacted. Mackhll with %~ rnml2"
3C~ mm/12" or as ether'isa directed by
~he above noted Si~e Authorities with
compacted, dense, graded agerega~e. The
Uni-green units are placed on a thin,
compacted I~yer of ~ot more th~n 15
mm/'A" of sand. Revegetation proceddres
,e the same as those described for
usiuit Cunbul uppliuutiu~s.
·. UNI.GREEN
Oimur~aiunu/Weight
t~(igLh ~ mr,'~ (~"}
VVidJh 2~ mm t11")
Height 110 n~,'o
S~°nelm2 6,4 (1 stone 1.~ sq, ~,)
Ma~ 20 kilograms
Mass/sq. motors 129
IMasa/sq. ft
lull i¢~tefioc:klr~g C. flB(3cleri~,tl::$ Of 4.,fl,.gr#un are