Parks Coppell FS-CS 861215 THREAOGILL - DOWDE ~-' ~=~=~[~' * ®[~
& ASSOCIATES
16250 Dallas Parkway, Suite 100
ATTENTION
WE ARE SENDING YOU ~ ARach~ ~ Undar sep~at~ co~r via the followin~ items:
~ Shop drawings ~ Prints ~ Plans ~ Samples D Specifications
D Copy of le~er n Change order ~ d~ '~ ~,'4o~. [ ~ ~
' DESCRI~ION
COPIES DATE NO.
THESE ARE TRANSMITTED as checked below:
[] For approval [] Approved as submitted [] Resubmit _copies for approval
~For your use [] Approved as noted [] Submit copies for distribution
[] As requested [] Returned for corrections [] Return corrected prints
[] For review and comment []
[] FOR BIDS DUE 19__ [] PRINTS RETURNED AFTER LOAN TO US
REMARKS
SIGNED:
If enclosures are not as noted, kindly not/fy us at once.
THREADOILL - DOWD.
& ASSOCIATES
16250 Dallas Parkway, Suite 100
DALLAS. TEXAS 75248
A~ENTION
.~o.e .~-06.~ ~, ~ ~ ~. ~ ~ ~ ~
WE ARE SENDING YOU ffi Aflach~ ~lJ~dcr ::k;,.t~ ~uver v~a -J' the following items:
~ Shop drawings ~ Prints ~ Plans ~ Samples ~ S~cifications
~ Copy of latter ~ Change order
COPIES DATE NO. DESCRIPTION
THESE ARE TRANSMI~ED as check~ ~low:
~ For approval D Approv~ as submiff~ ~ Resubmit ~pies for approval
B For your use B Approv~ as not~ B Submit copies for distribution
D As r~uest~ D Return~ for corr~ions D Return ~r~ prints
For review a~ comment
~ FOR BIDS DUE ~9~ ~ PRINTS RETURNED A~ER LOAN TO US
__ __
copy To ~,'+-.,' ~,.,~ .',. --,.- ~ e,~. oF' c,,~,oo z'/
,4rf/~. ~::j /~'//e.~/ U.;~'~ C.~. SIGNED:
~Z~3 ~ ~ ~ o~4z~ If e~losums are not a~ n~ed, kindly ~ us
PARKS OF COPPELL
City of Coppell, Texas ~ "
HYDROLOGIC & HYDRAULIC PARAMETERS
The hydrologic and hydraulic parameters for this project are those
used in a preliminary FIS report and Floodway Map dated November 2,
1982, which subsequently became the revised FIS report and Floodway
Map dated February 15, 1984. The HEC-2 models are based on the input
data for discharges, section numbers, cross section data and encroach-
ment stations of a run by Cawley Gillespie & Asociates, Inc executed
June 23, 1982 with a HEC-2 release updated August 1977, modification
53. The current project HEC-2 models were run with a release updated
May 1984, modification 56. This difference created only minor water
surface differences at the upstream sections, which appear to be
cumulative. The models presented are based on the water surfaces and
floodway encroachment stations as reflected in the February 15, 1984
report and Floodway Map.