HomeMy WebLinkAboutSite Certifications - 06/28/2007m
FILE: 05-036.15
May 17, 2007
City of Fort Collins
Stormwater Utility
700 Wood Street
Fort Collins, CO 80521
RE: Colorado State University Summit Hall Parking Lot Expansion
To Whom It May Concern:
This letter is to certify that the detention pond, outlet structure and culvert for the CSU
Summit Hall Parking Lot Expansion were constructed per the design plans. The design
volumes and as -built volumes for the pond are shown in the following tables. The new
detention pond drains into an existing detention pond which has its 100-year water
storage elevation at 5021.45. Because of this, the actual storage in the new pond is
determined by assuming its base elevation at 5021.45. This is reflected in the tables in the
last column. The design 100-year WSEL was 5023.5 however the as -built 100-year
WSEL is 5023.7. The storage volume of this pond is still in excess of the required
volume.
Design Volumes:
Pond Invert
Discharge Pond WSEL
100-yr WSEL-
Spill -
top of berm -
Stage
(ft)
Surface
Area
(ft2)
Incremental
Storage
(ft3)
Incremental
Storage
(ac-ft)
Total
Storage
(ft3)
Total
Storage
(ac-ft)
Actual
Storage
(ac-ft)
5019.65
0
5020
100
586
0.00
586
0.00
0.00 ,
5021
1209
1943
0.01
2529
0.01
0.00
5021.45
2957
1304
0.02
3833
0.03
0.00
5022
3495
2169
0.04
6002
0.07
0.04
5023
4506
4236
0.09
10238
0.17
0.13
5023.5
5041
2381
0.05
12620
0.22
0.19
5024
7292
2516
0.07
15136
0.29
0.26
5025
Required Water Quality Capture Volume:
Required 100-Yr Detention Volume:
Total Required Volume:
Volume Provided:
(ft3)
ac-ft
1,020
0.02
7,408
0.17
8,428
0.19
15,136
0.26
1 of 2
As -Built Volumes:
Pond Invert
Discharge Pond WSEL
100-yr WSEL-
Spill -
top of berm -
Stage
Surface
Area
Incremental
Storage
Incremental
Storage
Total
Storage
Total
Storage
Actual
Storage
ft
ft2
ft3
ac ft
ft3
ac-ft
ac-ft
5019.55
0
5020
459
586
0.00
586
0.00
0.00
5021
1946
2332
0.03
2918
0.03
0.00
5021.45
2542
1514
0.02
4432
0.05
0.00
5022
3071
2042
0.04
6474
0.09
0.04
5023
4041
4007
0.08
10481
0.17
0.12
5023.7
4748
3166
0.07
13647
0.24
0.19
5024
5051
1466
0.03
15113
0.27
0.22
5025
(ft3)
ac-ft
Required Water Quality Capture Volume:
1,020
0.02
Required 100-Yr Detention Volume:
7,408
0.17
Total Required Volume:
8,428
0.19
Volume Provided:
15,113
0.22
The water quality structure was constructed per the design plans and the 15-inch RCP
was placed per the plans. The invert elevation at the water quality structure is 5019.55
with a 3-1/8" orifice plate. The invert elevation at the pipe outlet is 5017.35 which is
higher than the design invert of 5017.07. The slope of the pipe is 0.82% which is still
much greater than minimum grade of 0.15%. The orifice plate in the existing detention
basin has been enlarged to 4-13/16" per the design plans. Riprap has been placed at the
inlet to the detention pond and the outlet of the 15" culvert.
In summary the detention basin and all structures have been constructed per the design
plans which meet the City of Fort Collins requirements. If you have any question please
feel free to contact me.
Sincerely,
Scott M. Boyle, E.I.
Design Engineer
The Engineering Co.
CC. Jim Stoddard, CSU Facilities
44i
Rick R. Pickard, P.E.
Principal
The Engineering Co.
2of2
RWATER
ECEDE®
cif it 0 2007
THE ENGINEERING COMPANY
TO
ATTN
ADDRESS
PHONE NO
LETTER OF TRANSMITTAL
City of Fort Collins
Jay Barber
700 Wood Street
Fort Collins, CO 80521
DATE
FROM
SUBJECT
PROJECT NO
CC
2310 E. Prospect Rd., Ste. B
Fort Collins, CO 80525
ph: 970.484.7477
fa: 970.484.7488
www.tec-engrs.com
June 28, 2007
Scott M. Boyle
CSU Summit Hall Parking
Lot As-Builts
05-036.15
SENT VIA ® First Class Mail ❑ Certified Return Receipt ❑ Overnight for Delivery By:
❑ Hand Delivery ❑ Pickup ❑ Ground ❑ 10:30 AM ❑ Noon ❑ 5:00 PM
ITEMS TRANSMITTED
Copies
Date No. Description
1
6/28/07
As Built Drawings for the Detention Basin and Pipe at
CSU Summit Hall
THESE ITEMS ARE TRANSMITTED AS CHECKED BELOW:
® For approval ❑ For your use ❑ As requested ❑ For review and comment
❑ Please return signed copy(s) ❑ Other:
FOR SUBMITTALS ONLY: ❑ No Exception Taken ❑ Make Corrections Noted
❑ Revise and Resubmit ❑ Rejected ❑ Submit Specified Item
REMARKS: Jay,
Sorry it took so long to send these to you. I have included only the sheets that pertain to the
detention basin and pipe. If you need anything else please let me know. Thanks
0
C.S.U. SUMMIT PARKING LOT
LOCATION
I F:\2005 Pmlects\05-036 CSU — Summit Hail
COLORADO STATE UNIVERSITY
AUGUST 2006
OWNER:
COLORADO STATE UNIVERSITY
CONTACT: JIM STODDARD
321 FACILITIES SERVICES BUILDING
FORT COLLINS, COLORADO 80525
CIVIL.:
THE ENGINEERING COMPANY
CONTACT: RICK PICKARD
2310 E. PROSPECT ROAD
FORT COLLINS, COLORADO 80525
(970)484-7477
VICINITY MAP
N.T.S.
Sheet List Table
Sheet Number Sheet Title
-- COVER SHEET
Construction Drawings
C4 GRADING PLAN
C6 STORM DRAIN PLAN Q PROFlLE
C8 I WATER QUALITY STRUCTURE DETAILS
'THESE PUNS HAVE BEEN REVIEWED BY THE LOCAL ENTITY FOR CONCEPT ONLY.
-1 HEREBY AFFIRM THAT THESE FINAL CONSTRUCTION PUNS WERE
THE REVIEW DOES NOT IMPLY RESPONSIBILITY BY THE REVIEWING DEPARTMENT,
PREPARED UNDER MY DIRECT SUPERVISION, IN ACCORDANCE WITH
THE LOCAL ENTITY ENGINEER, OR THE LOCAL ENTITY FOR ACCURACY AND
ALL APPLICABLE CITY OF FORT COLLINS AND STATE OF COLORADO
CORRECTNESS OF THE CALCULATIONS. FURTHERMORE. THE REVIEW DOES NOT
STANDARDS AND STATUES, RESPECTIVELY; AND THAT I AM FULLY
IMPLY THAT QUANTITIES OF ITEMS ON THE PLANS ARE THE FINAL QUANTITIES
RESPONSIBLE FOR THE ACCURACY OF ALL DESIGN, REVISION, AND
REQUIRED. THE REVIEW SHALL NOT BE CONSTRUED IN ANY REASON AS
RECORD CONDITIONS THAT I HAVE NOTED ON THESE PLANS.
ACCEPTANCE OF FINANCIAL RESPONSIBILITY BY THE LOCAL ENTITY FOR ADDITIONAL
QUANTITIES OF ITEMS SHOWN THAT MAY BE REQUIRED DURING THE CONSTRUCTION
PHASE..
The Engineering Company
2310 Fast Prospect Rued, Suite B Fort CoHiM C0 80525
15 Summit Hall Final Dsalgn\Eng data\05036.15.00.dwg Loaf Saved: 6/28/2007 10:14 AM AutoC Wr. 17.OS (LMS TECH7970)484-7477 www-Two- ii (3=
DRAWINGS Of RECORD
lua JUNE 2007
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RIGHTOFWAY I - --__ L___- I \ _ - - - - - - L_. - / £-. N 1
PROPOSED AT OF WAY __
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ACCESS EASEMENT \ . 2 e 'ONCREIE BASE
Id Id l -_ IdU \ \ SS I SEE EXISTING ORIFICE PLATE
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PROPOSED DRAINAGE EASEMENT \ \\\ \ IL S;/ �r� y� ' S.
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y \3, U 5027.64 \ �5g� �50 +nM• soh _+•A� A•� 30hi ` `'vim .IX 502y. AS HD
H; 502e.32 EX 5027.29 AS IJNE I
'3' TRANSITION Ex Wzf.A5EUENT
x E% 502).33 '� `+' EX 5022]9 1
r IX Wza]1 \ ASPHALT
TE RO UP'- I "`` ` I `-- �� IX W22.91 5022.60 0 10 20 SOOF a0
ALL CUR 8 1` •^ I _ _ Seale 1" = 20'
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E% W2]. \ E W2 .>� E 5029. -�i f_ _ I .`-r ` Ef 50 52 \ \� I n. NOTES:
HIGH PT z ��;; _ - r-i(dt'- I~ ;1.7C rgy��� \g' p I I 1. ALL SPOT ELEVATIONS ARE FLOWLINE
PL -PL %GRADE BREAK) P / n-=-T-PrX-x x----r-rr)I---xPe-F-'�-ac F__x='---.IH.-K-re*-.A.-rt-ex�P.`--%�.-a%�)_dPi--K-%r
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K--4LX UNLESS OTHERWISE NOTED.
•- i W29.3 :• 1:, B , D IIN,, - / /. ' S-1. 5X I W2a.,9 LEGEND
ADD ZW / / OUT LOW CURB 502 3D -EOVND /a _ M AND
ADDITIONAL 02B.0a 5 ZW ' l
1 _ _ 21 SC CAP OUTFLOW CURB AND GUTTER
`�� / / - \ 8 C TE I INFALL CURB AND CUTTER
STALLS r i ! W2'wdf'D\ �6'' i // • : J • 1 • J �/ 11 Wet. 0 302SW a HIGH qT
x x WZ2.a9 .._ 5027A.W27.52 \ ^ UTILITYT I I ej+n \ 1 W9a.la 502a.10 GRAOEI B
DRPUNE SH m I W2).)2 .\ I EASEMENT I N 5.1T8X \ W2a.10
AMID SM.All TREES. � r � �. _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ - - __ \ PROP / BONtU FENCE
\ 502A_l) \ I I \-623.70 �E GAS E./
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5 zazz \\ ,' `�\\ PAN
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CITY OF FORT COLLINS, COLORADO
I:-Ip DPIPLR)E \\\ I I ' I\ DETENTION POND � I UTILITY PLAN APPROVAL
LARGE A
CHAIN LINK FENCE-Blas I \��� �� II l w RMDIG. UN UD�� 1 Cltt ENGINEER DATE
\ ` 0 E
`�-`'•p /� `�� ``��� `\�\ f •�``1,' GASu ...�� - ,y,__--� CHECKED BY:
A'- -X�X-% X-X-%-X-X-x i-X-X_X-X-X_x X-X--X_X=%' X-% x X X_-%-Y_X=X_X_ 4�
k '1� - 1 -Ir X•�%_ X-,�X=X X_X-% % X %-X�X-%-X WATER AND SEWER UTILITY DATE
Id--ld--ld I 'Id ld-l�ld='ILL-1 Id F--- I ..LL_�Lc;Sos)_z __-X •--'---�Ir r _lea=-y---Y,_. -'<t- oTr� CHECKED BY:
` I `C�' �t�r-_���-�� x--�)�-�� ��I-cm..---01r--+- STORM WATER UTILITY DATE
WIRE FENCE HOUSE AND SIMALL MEEES 1r I �OU HOUSE I
.R SHED SHED
BOARD FENCE i HOUSE CHNN LINK iDJCC
a SEE WATER QUALITY
1 I HOUSE I STRUCTURE A SHEET C8 a
F DRAWINGS OF RECORD
a I i I i DATE JUNE 2007
F:\2005 Pro eets 05-036 CSU - Summil Hall Parkin Lot 15 Summll Hall Final Deei n En data C3 GRADING PLAN.dw Loel Saved: 6 19 2007 4:30 PM AuloCad Ver: 17.OS LMS TECH l
N0. DATE REVISIONS BY SHEETS SHEET
DRAWN JWL DESIGNED RRP DATE May 06 Zile Engineering Company. . CSU SUMMIT PAR UNG LOT0 1"
CEECILED RRP GRADING PLAN IF Nor L 1NCI DN 3 C4
SCALE 1'=20' APPROVED WHM PROJ. NO. 05-036 2310 FA¢ Prospect Road, SLiteB FortCaUia9,C080525 COLORADO STATE UNIVERSITY TIES SKEET. ADJUST
(970)484-7477 vIWLv.TeGCOgta.COm 9CA189 ACCORD07GLY
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CITY OF FORT COLLINS, COLORADO
UTILITY PLAN APPROVAL
APPROVED:
5005
-
5000
4995
--
--�
--
—
I
-
-
-
-
CITY ENGINEER DATE
CHECKED BY:
WATER AND SEWER Un- R DATE
CHECKED BY:
SIoflN WATER UTILITY DATE
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F: 2005 Pro ecfs 05-036 CSU - Summit Hall Parkin
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Lot 15 Summ11 Hall Final Dssi n En data C5 STORM DRAIN PLAN A: PROFILE.dw Last Saved:
1+00
6 28 2007 10:12 AM AutoCad Ver: 17.OS LMS TECH
2+00
3+00
NO.
ATE
REVISIONS
BY
DRAWN JWL DESIGNED RRP
,•=51VT CIL8CI03D RRP
SCALE 1'=20'HZ APPROVED WHM
DATE May 06
PROJ. NO. 05-036
• •
�Z'lle Engineering Company
2310 East Prospect Road, SufteB FDEt COBins,C080525
(970)484-7477 w .TcocngmC=
CSU SUMMIT PARKING LOT
COLORADO STATE UNIVERSITY
STORM DRAIN PLAN & PROFILE
0-1"
IF NOT 1 INCH ON
THIS SHIOR. ADJUST
gCA1E3 ACCORDINGLY
SHEEFS
3
SHE ET
/-�G
W
I
it
m
0
1
H
m
(4)-%"x4' STAINLESS
STEEL TAMPER PROOF,
BOLTS
1'-0. 8" 4'-0" 8" 6'
, %' STEEL PLATE HOT
.DIP GALV. CENTERED
ON OUTLET PIPE
OUTLET
PIPE 15'0
-W"O HOLE. HOLE IS
LOCATED AT INVERT OF
OUTLET PIPE
MODIFY EXISTING
`ORIFICE PLATE HOLE TO
A NEW HOLE 0=411(i
EXISTING
ORIFICE PLATE
MODIFICATION
DETAIL 4
N.T.S. C8
-m_�
3
8818888f'
±.II
io g OVERFLOW TRASH RACK TUBE
Ce SECTIONS ON 6' CENTERS
SEE NOTES
WATER QUALITY STRUCTURE PLAN
SCALE: 3/8'-1'-0'
0156 VEE SUPPORT ROD
AT % O.C.
z f
0.139'� 0.090" No. 93 STAINLESS
STEEL (U.S. FILTER
OR EQUAL) WIRES
DETAIL 2
C8
BOLT DOWN
LOCK DOWN
C808.75 AMERICAN
STANDARD STRUCTURAL\
CHANNEL TRASH RACK
ATTACHED BY WELDING
RACK SWIVEL
B' HINGE
i4O12"EW CENTER
,�/(TYP WALLS)
1 X r
A 1 15'OUTLET
I ®EL 19.55
• PROVIDE /4 HOOP AROUND
C8x18.75 AMERICAN 2-/4 6 PIPE PENETRATION PROVIDE
STANDARD STRUCTURAL /1012-EW WATERSTOP AT PIPE
TRASH RACKS: NOTES:STEEL CHANNEL FORMED CENTER CENTER PENETRATION.
1. WELL -SCREEN TRASH RACKS SHALL BE STAINLESS STEEL AND SHALL BE INTO CONC BOTTOM ATTACHED BY INTERMITTENT WELD ALONG THE EDGE OF THE MOUNTING FRAME. SIDES..
2. BAR GRATE TRASH RACKS SHALL BE ALUMINUM AND SHALL BE BOLTED WELL -SCREEN FRAME
USING STAINLESS STEEL HARDWARE. ATTACHED TO CHANNEL
BY INTERMITTENT WELDS
3. OVERFLOW TRASH RACKS:
A. OVERFLOW TRASH RACKS SHALL BE MOUNTED USING STAINLESS STEEL
HARDWARE AND PROVIDED WITH HINGED AND LOCKABLE OR BOLTABLE ACCESS
PANELS. SECTION A
B. TRASH RACKS SHALL BE STAINLESS STEEL OR ALUMINUM. HOT DIP SCALE: 3 8 =1 -0 CS
GALVANIZED STEEL MAY BE HOT POWDER COATED AFTER GALVANIZING.
e" 12' 12" 12" e' 16' STEEL PLATE HOT
PL C80 8.75 STEEL CHANNEL STEEL` TAMPERAPROOF DIP GALL. CENTERED
CHAMFER TYP ALL FORMED INTO CONCRETE TO BOLTS ON OUTLET PIPE
EXPOSED CORNERS 6" SPAN WIDTH OF STRUCTURE O
DRILL '1fi • jq
CALV. STEEL - OUTLET
HOLES 0 4" O.C. PLATE %'xg•x2' �� ���� PIPE 15*0
/4012'EW < I it
1'-3' 6' 1'-3' %*x4" STAINLESS 1• I
ice` y STEEL BOLTS (TYP) _ FL 19.55 1`��� .� IlVfi*O HOLE. HOLE
LOCATED AT NVERTSOF
(TYP)
I: Gi'. ..�( CENTER (TYP)
WELL ---SCREEN TRASH RAC ; C80 88755 GA•LLV. STEEL
ATTACHED BY INTERMITTENT CHANNEL FORMED INTO
WELDING ALL AROUND CONCRETE
DETAIL 1
N.T.S. C8
9
+� °
r#410912�; %*x4' STAINLESS STEEL BOLTS (TYP)
8'-0' 6' 010' O.C.
DETAIL 3
C8 N.T.S. C8
WATER QUALITY STRUCTURE A
DRAWINGS Of RECORD
,u JUNE 2007
CITY OF FORT COLLINS, COLORADO
UTILITY PLAN APPROVAL
APPROVED:
CITY ENGINEER
CHECKED BY:
WATO AN — A6wT�
CHECKED BY:
STORM WATER UTUJTY DATE
DRAWN .IWL DESIGNED RRP DATE MOY 06 I i ne L' ngincei mg k ouipany I CSU SUMMIT PARKING LOT I WATER QUALITY I °-L 3 CO
o I
CREC!® REP V NOT 1 INCH ON
SCALE AS SHOWN APPROVED WHIM PROD. NO.05-036 2310 Fag Prospect Road. SuiteB Fort CuUn%CO60525 COLORADO STATE UNIVERSITY STRUCTURE DETAILS THE SBReT. ADNBT
(970) 484.7477 www.Teoeu Cm SCALES M ODRDINGLYI I