HomeMy WebLinkAboutDrainage Reports - 08/11/1989y� �'
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FINAL DRAINAGE REPORT
'
FOR
'
CREEKSIDE ESTATES P.U.D.
REVISED AUGUST 10, 1989
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Prepared by: Parsons & Associates
432 Link Lane Plaza
Fort Collins, CO 80524
' (303) 221-2400
' PROJECT NO. 88.20 SLY
1
FINAL DRAINAGE REPORT
CREEKSIDE ESTATES P.U.D
INTRODUCTION
This drainage investigation has been performed for the
purpose of providing design information for the development of the
Creekside Estates P.U.D., a residential development to be located
east of Westshore Way and west of Harmony Reservoir. The City'of
Fort Collins "Storm Drainage Design Criteria & Construction
Standard" was used as a basis !for guidelines and criteria
throughout this investigation.
SITE DESCRIPTION
The Creekside Estates P.U.D. is situated in the south one-
half of Section 36, Township 7 'South, Range 69 West of the 6th
Principal Meridian, City of Fort Collins, Colorado. The site
contains 3.01 acres. To the west is Westshore Way, to the south
is Boardwalk Drive and the site is contiguous to Harmony Reservoir
on the east. The site will be developed into 10 single family
lots with a minimum lot size of 7700 square feet. ,.This is'a
replat of the previously approved Shoreline P.U.D.
DEVELOPED CONDITIONS
Because all runoff from this development is directed towards
Harmony Reservoir, and in compliance with the Master Drainage
Study for "The Landings P.U.D." dated January 1979, no detention
is provided -for this site. There is a drainage channel to the
north of the site which carries7 48 cfs from off -site, and a
drainage channel to the south which carries 108 cfs from off -site,
per the Master Drainage Study for "The Landings P.U.D." All
runoff from the site leaves undetained to the reservoir. High
water in the reservoir is 5007.00.
Maintenance of the -North half of the Northerly Drainage Channel
(North 12.5 feet of the North 25 foot drainage easement) and all
portions of the drainage channels contained within Tracts A, B,�&
C shall be maintained by the Homeowner's Association. All other
portions of the drainage channels and the adjacent reservoir shall
be maintained by the adjacent lot owners.
CONCLUSION:
1 Storm drainage improvement design for the proposed Creekside
P.U.D. is based in part on the earlier Storm Drainage Report for
' "The Landings P.U.D." Alterations to that report were required
to reflect modifications in the drainage improvements proposed for
the Creekside P.U.D. Alterations and design have been performed
' in accordance with the City of Fort Collins Storm Drainage Design
Criteria Manual; dated May 1984. Calculations are included with
this report and indicate the proposed Creekside P.U.D. will have
' no adverse impact on the surrounding area.
Prepared under the dir t supervision of:
Donald M. Pars ns, P.E. CO. # 13131
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APPENDIX
PARSONSC&
CLIENT
JOB NO.
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PROJECT CALCULATIONS FOR
CONSULTING ENGINEERS
MADE BY DATE CHECKED BY DATE
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RPARSONS &
ASSOCIATES
CONSULTING ENGINEERS
Ft. Coln , Colorado 8052C
CLIENT
108 NO. gam" Z-� aY
CSt DE �aaT, CALCULATIONS FOR
PROJECT '
MADE BY B�Q' DATE 2>B9 CHECKED BY DATE SHEET OF
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CONSULTING ENGINEERS
FL Comm, Colorado 80524
CLIENT
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PARSONS &
/ram- ASSOCIATES
CONSULTING ENGINEERS
Ft. CoNm, Cobrado SOS24
CLIENI
JOB NO.
PROJECT .a&T CALCULATIONS FOR
MADE BY DATEE'/219-CHECKED BV DATE SHEET.
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PARSONS &
ASSOCIATES
CONSULTING ENGINEERS
Ft. Conim, Colorado M24
CLIENT
JOB NO. g'r-'3 . 75.E SL-y
PROJECT CALCULATIONS FOR
MADE BY Z;e—n DATE CHECKED BY DATE SHEET OF
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'' 1'•^'•'^• `•'^" ` ""• •J "'" ""' Y1i' L Bales shalt be placed in a single hel, lengthwise, oriepted perpendicular
to the centaur, with ends of adjacent bales tightly abutting one another.
ix 2. The reining steps for installing a straw bale barrier for sheet flaw
_ade
applications apply here, with the following addition.
' n;;zN 0. The barrier shall be extended to such a length that the bottom of the end
bales are higher in elevation than the top Of the lowest middle We to assure
�\ that sediment -laden runoff will flaw either through or inner the Whaler But But
around it. 1
small 4 Ce.4,(,cahan e( mn{ormm�m le Plane (ads-bmNa) a 'aul ymr b
acc lesI a D( s4"M d""Te Cac c,as bga y 4n aoner rae w ga+
(i.a ssa+a uc Ceierad.. Feld slats w,n be retu•M.
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bT¢AW BALE 8q¢@16.Q
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TO SE CONTAIUEo @hTl¢ELY WIT14114/
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5.11 CFS
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E 65 CFS
6.11 Fee
4.2 FPS
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15.95 own
51.Oilseeds
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as 04 cuts
57 CBS
loft ONES
4.E FPS
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2207 CEH
1" 25 CPS
4.2 FPS
124. o"1 CFS
2,56 CPS
7,52 oFS
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Is lend ties
INSTau STenW BALM OETaIL
ommd OSTAIL
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DRAINAGE NOTES
1. Drairegeways and "ales as shown on this plan must be
preserved and remain unobstructed.
2. Project Benchmark: Hydrant number P-9-N, north bonnet belt
P.H., HE corner Lemay and Harmony. Elevation - 4990.50.
ERoslox ENOT
Permanent or temporary erosion control mosaires must be
applied to disturbed areas within 5days aftfinal grade is..
reached.
A31 temporary and permanent erosion control Is sediment control
pkacticee must be maintained S repaired as need" to aveure
continued performance of their intended fraction.
Pli osoen cDlNr.l terocturts shell ea m+mned ey+Ae ,( ad r
until Pe°^>rwr+ lends : Ofealerce a,a nspisen d lnnance
< e ,e +pi z amens 4h0 re ensAdl'4Y oc +he
uameow"a'sr Aaeeala4•0n.
pH¢e a Uornnor Aloetu Mnl.w d,F Mlm Nee,x D¢e,uaoe C+srriaEi (Uoerx 1Ac
Me, I.la¢M Ta�0G.+lume Euaaw•aur) AUD n E Deeouaec CUAuuErz a.o iuEp
WIMJW rYAGti 4,0, 46 µay. bra Wf ME 4ou<ewweea b`acaunW. ALL oME.
p(iT1oJz OF DZIN00Aola Cwquu¢r5 atA , 6% Maur>IUED HY ME go/acEur (.OT owe e.
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f H4RMONY RESERVOIR
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MOiureJsuCE HY nOJMeuT - Il,awrmuauCE HY I(OM@oW YEeS
MOMEOW UEC yR.p[.IaTlp.1
MW. F¢E60pq¢O
Ll1aw waTE2 D. m.oa ate �'�
of<�•1 flooded 5LoPE5
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AN gNU1G@@O ST@4W
U 01-aM MAT
SECTION A -A E, S-S .
MM. GN4NNElggECTrON
`JWa-rlON CC me
CONCRETE PAN DETAIL
20 O AO
90
SeALe: /"+JO'
LEGEAIO
--SO/O--EX/ST//l4 CONTOUR
-'�`�YR')Po-2?XOasn-FIN5A'Lt.2E
FF+ F/NKM F<OOR E<EVI//ON
OR- ROU4M FAO CL1iVd T/ON /T
6ROON0 sORFACE
-Fe++� ORA/NdGE FCOM O/RECT/ON
0 D¢AINApB 06616N PCWT
devastated. DSVOLoPWO SUn, B461N poUUOA¢Y
�02AIMA6@ gaglN OE51ONgT10N
A¢EA OF feel IN
A6¢ES (-
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PARSONS &
CONSULTING ENGINEERS
ASSOCIATES
492 Link Linda Plaza
Ft. Collins Colorado 90
tcAAJ w w.Hem. a.eo c
Fuel -rMP. 12" out rest),
D1To4. MAn.iTAFl.$ 4 CL
LdJTh L. EluAl LANoamP,,.lh lO it/ PLme
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Sub:: 1"=30' 88.20 SLY CREEKSIDE ESTATES
Dailgno: DM Checked BY: DIi 6
Draitaman: nN MC prepared: 6/69 GRADING AND DRAINAGE PLAN Sheets