HomeMy WebLinkAboutSite Certifications - 06/24/1993,
Northern Engineering Services,� Inc. /v
June 23, 1993
Mr.
Glen Schlueter
Stormwater
Utility
City
of Fort Collins
235
Mathews
P.O.
Box 580
Fort
Collins, Colorado 80522-0580
Sinai Approved Report
re:
Kingston Woods P.U.D.
()ate ��l3
inage certification
Project No. 9315. 0
430�
`vJ
S c r v
Dear Glen:
Northern Engineering has performed a field inspection and
survey of the constructed drainage improvements for Kingston Woods
P.U.D. The intent of this work has been to confirm compliance with
the design intent of construction plans which were prepared by this
office in August of 1992.
Two sheets of drawings have been red -lined to show the extent
of this work and the results of the survey and are attached to this
letter. Volume calculations for the detention pond are also
attached for your review.
During construction of the project, it was discovered that
unforseen conditions to the west of the site caused the drainage
from an existing driveway to be blocked. As a remedy, the drive
surfaced was elevated, a drain pipe placed under the drive and a
small swale was placed to carry runoff from the drain pipe into the
Pleasant Valley and Lake Canal. Calculations were made to assure
that the invert of the swale would be above the water surface in
the canal.
Since the sediment trap located at the outlet from the
detention pond was in place at the time of the certification
survey, it is undetermined whether or not the orifice plate has
been installed. In order to control outlet flows from the pond
during the time that the sediment trap is in place, it is
recommended that either of the following measures be taken:
1. Remove the sediment trap, install the orifice plate and
replace the sediment trap.
420 S. Howes • Suite 106 • Fort Collins, Colorado 80521 • (303) 221-4158 • Fax (303) 221-4159
Kingston Woods PUD
Drainage Certification
page 2
2. Constrict the opening into the standpipe of the sediment
trap with cap with a 7-inch opening.
Prior to the construction of either of these options, it is
understood that the developer will escro 150% of the estimated
cost to install a control device. We esti ate that either option
can be placed a cost of $200. T e scrow amount, therefore,
should be 300. 00.
We find that the constructed drainage improvements have been
built in substantial compliance with the design work which was
prepared for this project. Work remaining to be completed consists
of seeding of the disturbed areas. It is our understanding that
a letter of credit has already been submitted to the City of Fort
Collins which covers 150 per cent of the cost of this seeding.
If you have any questions or comments as you review this
material, please contact this office at your earliest convenience.
REj�'P,,
Sincerely, `���.�`°�Q,0O
NORTHERN ENGINEERIN SERVICES, IIp�o'�P��
V00
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Michael F. Jo rs,P.E. 90,c�••
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POND SECTION ##2
LOCATED 19' (AVr-) FRnAA F FNn np- Dmin
90.5
ARE
=329sq.
ft.
w-rvv U+OU 0+80 1+00
STATION FROM N. PROPERTY LINE
POND SECTION #3
It I OCATFn 45' (AV(-- 1 G-Dr)hA U-
H.W.
L. = 90.5
inn A .
ARE
,,
=350sq.
ft.
iff,
• �_ ••-r-rU+OU 0+80 1+00
STATION FROM N. PROPERTY LINE
Q POND SECTION ##4
It LOCATFD 95' (AVr 1 MMA r rKn, nr-
nn
H.W. El.
= 9 0.
5
ARE
=320sq.
ft.
0+40 U-rov U+50 1+00
STATION FROM N. ► IFZOPERTY LINE
Z
O 95
Q
J
W
85
v--
POND SECTION #5
I nCATFr) 145' (AVG.) FROM E. END OF POND
EL.
= 90.5
LW.
REA=20
s > ft
0+00 0+20 0+40 0+60 0+80 1+00
STATION FROM N. PROPERTY LINE
Z
0 95
w
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W
P
L
0+00
85
It
POND SECTION #6
LOCATED 195' (AVG.) FROM E. END OF POND
H.W1 EL. = P0.5
ARE =103sa ft.
0+20 0+40 0+60 0+80 1+00
STATION FROM N. PROPERTY LINE
POND SECTION #7
LOCATED 245' (AVG.) FROM E. END OF POND
H.W.
ARE
EL.
=25sq.
30.5
ft.
l
0+00 0+20 0+40 0+60 0+80 1+00
STATION FROM N. PROPERTY LINE
Project Name: Kingston Woods P.U.D.
Project No.: 9315.00
Detention Volume Calculations
XSEC
AREA
AVG A
LENGTH
(sq.ft.)
(sq.ft. )
(ft.)
1
0
2
329
164.5
19
3
350
339.5
25
4
320
335
50
5
200
260
50
6
103
151.5
50
7
25
64
50
8
0
12.5
120
VOL CUM. VOL
(cu.ft.) (cu.ft.)
0 0
3125.5 3125.5
8487.5 11613
16750 28363
13000 41363
7575 48938
3200 52138
1500 53638
Sp1llwey Mush Pass
r-Top of Spillway IOyr. 9.orm PunCT'P
12'PER�OR�ret] fil
�WIND,
—
I I �Illl—�Ilr;l I I--IIII��II
— FLOW 'fI� q I un I�. lien
R G P I �1LI Mir I IIII
1,1 AS5re9�Ez Piled
WWir@ Mesh 12 (��lin),�`6ove IoporPipe
General Notes: PIPE OUTLET. WITH GRAVELFILTGR
1. Sediment shall be removed when one
half of the basin design depth has
been filled.
2. Removed sediment shall be deposited
in an area tributary to a sediment
basin.
SEDIMENT TRAP
Circular Channel Analysis &. Uesign
Solved with Manning's Equation
Open Channel - Uniform flow
Worksheet Name:
Comment: Line A Full Capacity
Solve For Full Flow Capacity
Given Input Data:
Diameter.......... 2.00 ft
Slope ............. 0.0134 ft/ft
Manning's n....... 0.012
Discharge.........28.37 cfs
Computed Results:
Full flow Capacity.....
28.37
cfs
Full Flow Depth........
2.00
It
Velocity..........
9.03
fps
Flow Area.........
3.14
sf
Critical Depth....
1.84
ft
Critical Slope....
0.OI16
ft/ft
Percent Full......
100.00
Full Capacity.....
28.37
cfs
QMAX @.94D........
30.52
cfs
Froude Number.....
FULL
Open Channel Flow Module, Version 3.42 (c) 1991
Haestad Methods, Inc. * 37 Brookside Rd * Waterbury, Ct 06708
Circular Channel Analysis k. Design
Solved with Manning's Equation
Open Channel - Uniform flow
Worksheet Name:
Comment: Check Capacities of storm drainage pipes
Solve For Full Flow Capacity
Given Input Data:
Diameter..........
1.25
ft
Slope .............
0.0043 ft/ft'
Manning's n.......
0.012
Discharge.........
4.85
cfs
(",omputed Results:
Full Flow Capacity.....
4.85
cfs
Full Flow Depth........
1.25
ft
Velocity..........
3.95
fps
Flow Area.........
1.23
sf
Critical Depth....
0.89
ft
Critical Slope....
0.0065
ft/ft
Percent Full......
100.00
%
Full Capacity.....
4.85
cfs
QMAX @.94D........
5.22
cfs
Froude Number.....
FULL
Open Channel Flow Module, Version 3.42 (c)°1991
Haestad Methods, Inc. * 37 Brookside Rd * Waterbury, Ct 06708
Circular Channel Analysis & Design
Solved with Manning's Equation
Open Channel - Uniform flow
Worksheet Name:
Comment: Check Capacities of storm drainage pipes
Solve For Full Flow Capacity
Given Input Data:
Diameter.......... 1.25 ft
Slope ............. 0.0040 ft/ft
Manning's n....... 0.012
Discharge......... 4.43 cfs_
Computed Results:
Full Flow Capacity.....
4.43
cfs
Full Flow Depth........
1.25
ft
Velocity..........
3.61
fps
Flow Area.........
1.23
sf
Critical Depth....
0.85
ft
Critical Slope....
0.0061 ft/ft
Percent Full......
100.00
%
Full Capacity.....
4.43
cfs
QMAX @.94D........
4.76
cfs
Froude Number.....
FULL
Open Channel Flow Module, Version 3.42 (c) 1991
Haestad Methods, Inc. * 37 Brookside Rd * Waterbury, Ct 06708
Circular Channel Analysis & Design
Solved with Manning's Equation
Open Channel - Uniform flow
Worksheet Name:
Comment: Check Capacities of storm drainage pipes
Solve For Full Flow Capacity
Given Input Data:
Diameter.......... 2.00 ft
Slope ............. 0.0040.ft/ft
Manning's n....... 0.012
Discharge......... 15.50 cfs-'
Computed Results:
Full Flow Capacity.....
Full Flow Depth........
Velocity..........
flow Area.........
Critical Depth....
Critical Slope....
Percent Full......
Full Capacity.....
QMAX @.94D........
Froude Number.....
15.50
cfs
2.00
ft
4.93
1'ps
3.14
sf
1.42
ft
0.0055 ft/ft
100.00
1.5.50
cfs
16.67
cfs
FULL
Open Channel Flow Module, Version 3.42 (c) 1991
liaestad Methods, Inc. * 37 Brookside Rd * Waterbury, Ct 06708
Circular Channel Analysis & Design
Solved with Manning's Equation
Open Channel - Uniform flow
Worksheet Name:
Comment: Check Capacities of storm drainage pipes
Solve For Full Flow Capacity
Given Input Data:
Diameter.......... 2.00 ft
Slope ............. 0.0080 ft/ft
Manning's n....... 0.012
Discharge......... 21.92 cfs
Computed Results:
Full Flow Capacity.....
Full Flow Depth........
Velocity..........
Flow Area.........
Critical Depth....
Critical Slope....
Percent Full......
Full Capacity.....
QMAX @.94D........
Froude Number.....
21.92 cfs
2.00 ft
6.98 fps
3.14 sf
1.67 ft
0.0077 ft/ft
100.00 %
21.92 cfs
23.58 cfs
FULL
Open Channel Flow Module, Version 3.42 (c) 1991
Haestad Methods, Inc. * 37 Brookside Rd * Waterbury, Ct 06708
Circular Chaime.1 Oiia.Jy!-.,j:-3 0, C)esiqil
Solved wil.1-1 r"falmillq's
("hallm,4 (Ill'iJo,1111 I tow
Wovksheot Name!- ll%JTiysJ-.on Isi.
Comment: 24" RCP----S'I'ORM SEWFP LINE
Solve ve. For A C 1, Ll ;9 .1, P I-- h
F.)IpLlt Ocita-
Oialflete) ......
I o p I., . . . . . ..... . 11 ..
ma n I I i I iq , s 11. - . ....
E) i -c, ha) <Y -----------
comrmj t t�d Resu 1. is
De p t, h . . . . . . . . . . . .. .
VO.L(:)(, i ty ....
Flow ow ea ..........
Critical DehLll ...
rercent Ftill ......
F t . i 1.1 Ca p a c. i 1,-. y .. - . -
OMAX @.941)....... .
Fr(:)Llcle NLJlllbPl- . . . .
2 M) f , I..
f
1 75 1 1-
4 Al
87 Al 7 l<
'In —L,7
Open Channel Flow Module. Version 3./12 1.991,
Haestad Methods. fiic. f, 37 BI-C)(AMide Rd e Wat-erbul-Y. Ct 0670P
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T1 FINISHED GRADE EVEV. \
1 } 99
20
TOP OF FOUNDATION ELEV. /I
MIN ¢5' ABOVE FINISH GRADE
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1 BLDG, SET RACK �.�.
ANaE Ill AN
OLUExT
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TYPICAL LOT ORADWa
LOTS 6 BLOCK A / -GLAEo � [LIES- y '
LOTS 5-3. BLOCK 2 1 PAN 0.1pI"AM
You x. LOTS
JAE. CONC. PAN DETAIL
FINISHED GRADE EVEV
p0A i1 TOP OF FOUNDATON ELEV.
�oG.3 iGF MILK 0.5MOVE FRESH GRADE
20' BLDG. SET SACK
M E.G. =
REMOVE EXISTING IRRIGATION
GATE NO. 116 PATCH DITCH
BANK WITH CLAY PER SOTS
REPORT III IiSu; iL r-I f ii_itV; NT 2
9'O' P A0
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EXISTING IRRIGATION DITCIY NO /
DRIVE -OVER CURB. GUTTER AND SIDEWALK NO MODIFICATION
REGERADE TOP OF EAST BANK,' NS
MI Loe rc�pt ar aCorP ITT
v
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SECTION B-B. eE" Il
TYPICAL LOT CROSS-SECTION ALONG BF CN gR,,N31Tlp
THE PLEASANT VALLEY AND LAKE CANAL Gpf OITCX REI�C qOp EC IS?lWC
IB.pNT C
91A.ONSr}RUC)IpH
LEGEND P�C�E�C NTR"'oWtJ"
_"OWE'
---IO----- EXIST. CONTOURS O101EI�Er ISNi a DADS cGTIpN"
F09 SCE
-wJ- PROPOSED CONTOURS Al
--- PROPERTY LINE B0N01I caMlEol lml•
W .lmRR Mr �, s
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' At
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�! RUNOFF FLOW DIRECTION n.RA VAL 1Y my NN .A. ..®
Pr d
Q DESIGN POINT Nux.e }p
BASIN DESIGNATOR APPROVED BY PLEASANT VALLEY A LAKE CANAL
B�. L BASIN AREA: AC THIS AY OF go, AD 1992
F.G.
ADDS F.D. Jl11 ) I 1s
10
AN_.__
i y OY
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9
1
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NOTES: - - _ - - - )BEE sxt la - R _ - _ '� - -
NO.97E EXISTING 91RIBAiR)N GATC
I. MAINTENANCE OF THE DETENTION POND B OPEN TRACTS SHALL BE THE H0. N>. % .d
RESPONSIBILITY OF THE KI NGSTON WOODS NOMEOMNERS ASSOCIATION <d" .r TTx15yw ie'.0 x'Ba c0.VBi a+ .df °n �°` J a
1 .+wefrnr6zOrr
T VALLEY 6 LAKE CANAL IS TO BE �1 '-------"-----------
2. EXISTING PIP RAP IN THE PLEASANT ATHE �GnRE Iw - ---- ----- -- -----
J_.h,L1.1 JE- VILLAGE .U.L. wRPS IAFE 1 1 Mmu I MUSLIM I an[ I I
RELOCATED TO THE NORTHERLY BANK OF THE RELOCATED CANAL FROM STA L�Ti ("4GIIl/1r- 5�I - c r'1 IIf=�
16.40 DI THE BON CULVERT. AS SHORIN ON THESE PLANS. - T L,,,,102 B.Ll AREA B I i k1 Will I I t 1 k t [ P It Tel life I] IIN I [ W M11 ..� m
3. THE SEDIMENT POND SHALL BE CONSTRUCTED WITH THE FIRST ERASEUsti ml..rfr IPi.K 1s1 Ill! 111 bb111N1lift) Itl Ilpb11111f11 III IIp11MUllalal b111 IIIAIIIAI Ildsl hbl MaRoJ�
� OF DEVELOPMENT. DISTURBED AREAS Of THE SITE WILL BE SEEDED AS -_-'-' --' """' --' -'---------- ---
DESCRIBED IN THE DRAINAGE REPORT. tl=Tu 11N11 I 1 1 wr ISSN, I
11CIN wN'w I III.A. ILLS IN Id I1.6 1111 w 1 1.1 I'L I w l N 1.1 I 19.0 21.2 11.0 4.0 H.R I 1.11 LIDS 1NWEYIM
4. LOTS IN THE AREA OF THE PLEASANT VALLEY B LAKE CANAL MAY BE SUBJECT k I.A.51 IIAM IN LS 11.4 16.11 w I 1.1 1.11 1.11 25.1 15.E 1I.N I.0 WAR 11,R 11.51
TO SHALLOW GROUNDWATER. IT IS E MADE
THAT A DETERMINATION OF I In 6 I NINNIN Slml I I N I II.0 16.I5 IN LI 11.1 11.11 } I L1 4.51 1.1115.1 15.E 11.6I 1.M NA I I.If 11.11 a
I ' I
PROTECTIVE MEASURES. IF ANY. BE SLIDE WITH THE ASSISTANCE OF A LP.I Bit I t t { k1 ASIDE I 3 1 k I f 1 k IIN ION It IIN I G 1 Y IIN N I LD 11.15 In 13 ILI 11.1Iw 1.1 1 A.$ 1 1.1I IL5 11.1 It." I.fl ILW 14.15 I1.11 1
DUAL IFI ED SOILS ENGINEER. Irl -.. DIMIMWNI..... III11JIN......1fit 11p.NNllkkl.Net111A111M1 lies) fall) A 1 1.61.... IN to NA 11.1I IN 1.1 11Arm 1.1IILS ...1...W LN.....I B.IS ILO '
................................................................................................................ 1 11.WI..........INNI rIr11W MN111r111eel Wr rNN. IN HIRf1111r1 ...................,... I1.11 I.H
5. PRIM TO CONSTRUCTION OF 10' RADIAL SWING GATE. ITS DESIGN MUST BE APPROVED I I I I I I 1 1 S I I I,.........INO OW111N N N tllml NO 1MM. WE HlHlallw ....................... I I.N I." I
BY PLEASANT VALLEY AND LAKE CANAL COMPANY. R I I B.011.11 IS I.1 1.5 6.11 1.6I in 1.41 LN ILS I nA I1.] II.0 I.N 11.1111.E LN 1 I LW NAT IS IJ 1.1 I.S 11N 1.4 I's Be I 1J I I61 IL5 II.N SM 11.111 I.1I I.9 'Men
IT 1 1.14 11.11 1511.1 LI 1.41 1.1 I IN 1.H 1.1 S.$ 11.1 1.1 II.N In ILI) I LN 1.0 1 1 1.41 If.N 11 1.1 LS 1.1 11N 13 1.1 1.1 I 1.4I 11.4 ILI 11.0 LN 11,111 Let Lll
at 10.4910.10 VI 1.4 I411 11.11 1.11 1.6I I4.1 11.1 ILU [.II II.11 11.11 1.11 1 1 1.11 II.M If 1.1 1.1 1.1 I All1111.1l 1.0 ME 1 IL5 11.1 11.41 B.II IPA 1 AM 1.91
w
REQUIRED VOLUME...................__1 )IJI I0.lt s11 1.1 EI.1 Ll 1 1.1 I f111.11 1.5 Lf 111.1 D.S II.N l.N 1LIS 11.N II.N SAT �
DETBRIDN PD10 151 LN 11.11 II 11.1 9.1 LI1 1.11 III L11 L1 BE I ME 16516N LN NA I I'll 410 ED.%I LATE /.I1 Mr..� II
1 pit
.. • • ca. ft. ( I t 1 LU ILx1 11,30 $
x1 1.1 115 11.1 1 NI LI I.f lJ 1 IA 1 11.4 11.1 ILu all ILI1 I LN I.11 p IS
OR At
Allow "it
le elkr air �yOP� `•Rf6/ ePE TI FT`<TCrNr[1r1r-iuiw:nJ
.. 51233 Co.Ce. ft. 1 111.1f II I5 15 1.1 13 1.11 1.1 III 1.111 N N 5 1 11 f 11 f l l.N 1.11 ILLS 1.11 1.11 ccXX'' AKC ti bb
AVAILABLE VOLUME..RF 69.JJJ
POND -FULL
WATER SURFACE ELEV 90.50 fL JI' EBOABO 1I11.6 I._ ..5 O 11.NkIrlM11.1 nn riff fH o1S11111 S .-......... I I.111.11 1, IF IA: ALI Ira CW NtO star
� t� 0�4-14-g$ 4
POND -FULL ELEVATION.. .. .. .305 h \ 1 L ILf111 5 111 Af Il.f It 1 1N 1.1 1.1 Ziff 11 tl l 11 ! ILk 1.11 II III 1.1I /IJS I. Br IB: All Ilw+ r1tlIN IIH rbl r
IMPOUNDED AREA b 9L50 fL1........I9.2 6 N ft. 15 1 1.1f II. 5 S I.1 Id LS 1111 1.4 1A 1.1 I IA I It 43 It 11 5,N II.11 11.11 I.4 f. Of L�. so of all film INrb1 %It11rr wwm I I �e : j
PEAK DISCHARGE...._..............................26 <L us1 L n 1___._. fail ,a<en.e 1.
O,E
- - HTPH Ei6-,- NORTHERN ENGINEERING I NEER I NG SERVICES I CES
EAST OF`SENECA
Pro Ject:
9123.04
Print Dote:
K91 u1998
GRADNG B DRAINAGE STREET.
420 SOUTH HOWES SUITE 106, FT. COLLINS. COLORADO 80521
Sc01 e: F•50'
_
Deel ner:
MVK
Chocked by: MF.
I 1 - (303) 221-4158
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SHEET 13
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FOR FOM
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FAN DETAIL Jill
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LDT 1
4 E
4 91. -
1,19
- -RAVEL GUTTER DIKE -
(TYPICAL)
ER
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=SHELDS
BENCHMARK
ISC o SE COR. OF SEC. ]1-
OF INTERSECTION OF NORSFi0 I
ELDS STREET)00CHMARK IS I.3]' IRgER THAN CITYT -
City of Fort Collins. Colorado
UTILITY PLAN
APPROVAL y
AFSIOV40:
n1AN
CIIIICKBD
A
CRICKED BY:.a�._.:�l�_
WICKED BYr J�[r
KINGSTON WOODS P.U.D.
GRADING AND DRAINAGE PLAN
Sheet
12
16
00
F I'✓4"'(IOK lE