HomeMy WebLinkAboutSite Certifications - 03/12/1997 (2)THE SEAR -BROWN GROUP
FULL -SERVICE DESIGN PROFESSIONALS
FORMERLY REID, INC.
209 SOUTH MELDRUM
FORT COLLINS. COLORADO 80521-2603
970-482-5922 FAX:970-482-6368
March 7, 1997
Mr. Basil Hamdan
City of Fort Collins
Utility Services, Stormwater
235 Matthews Street
Fort Collins, CO 80522
RE: Spring Creek Medical Park Lots 4 and 5 (Buildings D and E)
Drainage Certification for Certificate of Occupancy
Dear Basil:
We are hereby completing a drainage and erosion control certification for work done in conjunction
with Spring Creek Medical Park, Lots 4 and 5 (Buildings D and E). The intent of this letter is to
verify the existence and quality of drainage utilities serving these lots. Dr. Dennis Brenkert, through
Drahota Construction is seeking a certificate of occupancy for Building E. This issue has prompted
the need for this certification. The attached drawing will serve as the record document of existing
elevations and information surveyed on November 11, 1996.
The following items are in compliance with the Erosion Control Plan:
1. The rip rap weir has been built according to the cross section B1 shown on the plan. The
plans call for a width of 15.0' and the field investigation revealed a width of 18.0'. The rip rap
is extended into the bed of the channel, making a quaint habitat for some ducks, which have
since made it their home. Grey rip rap with a d5u of 18' was used.
2. The curb opening/overflow weir has been constructed according to the cross section redlined
on sheet 1 of 1, accompanying this letter. The original cross section on the plans was
modified by a letter dated September 26, 1996. The cross section was modified to keep the
width of the weir spill narrow enough not to surpass the width of the rip rap. The field survey
revealed the grades indicated on the redlined cross section. These grades match the proposed
design, and in fact, create`a deeper weir, thereby making the field condition more conservative
than the design. Please see the attached weir output analysis, based on the weir equation
(Q=CLH''S)
NEW YORK • PENNSYLVANIA
COLORADO•UTAH
STANDARDS IN EXCELLENCE
EQUAL OPPORTUNITY EMPLOYER
3. Finish grades were not designed The Sear -Brown Group (formerly RBD), but appear to have
been constructed in a condition which blends with the existing parking lot.
This certification is signed and stamped. By signing this letter I attest that, to the best of my
knowledge, the record document conditions of the drainage facilities are described above and on the
redlined plans attached. Failure to properly disclose all known information could result in rejection
of this certification and prevent the release of any Stormwater Utility holds on Building Permits and
/or Certificates of Occupancy.
Thank you for reviewing this certification. Please feel free to call Perry Cabot with any questions.
Sincerely,
RBD, INC.
Prepared by:
rv� ell, X4�'
Perry MiCabot, EIT
Project Engineer
cc: Nate Orr, Drahota Construction
348-010 (A) Correspondence
H:\USER\civil\projects\drahota.4&5\cert.001
Reviewed by:
Jim en -Morley, P.E.t
Project Reviewer
Y
RBD INC. ENGINEERING CONSULTANTS
WEIR SECTION FLOW DATA
CURB OPENING
WEIR COEF.
3.000
STA ELEV
0.0
20.00
6.5
19.61
6.5
19.11
11.5
18.81
11.5
19.31
13.5
19.31-
13.5
18.81
18.5
19.11
18.5
19.61
25.0
20.00
ELEVATION
DISCHARGE
(feet)
---------
(cfs)
18.81
---------
0.00
18.91
0.11
19.01
0.63
19.11
1.74
19.21
3.75
19.31
6.21
19.41
9.25
19.51
12.77
19.61
16.71 .
19.71(19,79>
21.12
19.81
26.26 J= 0.c)8'
19.91
32.31
E
EROSION CONTROL NOTES 1 t 2' SQUARE 6 4e
KILN DRIED POSTS
1. SILT FENCE SHALL BE INSTALLED AS SHOWN ON IIHESE PLANS PRIOR
TO CONSTRUCTION.
2 ANY AREA DISTURBED BY CONSIFIICTON ACIINTIES SHALL BE RESTORED MIRAR MWEL 10100
e --... • • TO AN ERG" PROW CDRDITION BY MEANS OF PANNG. SOWING. SILT FENCE
REVEGETATION DR BU6QNG CONSTRUCTION.
3. REFER TO SPRING GREEK PROFESSIONAL PARK UTILITY DRANNGS 8 0 (TYP.)
PREPARED FM M. DENNIS BRENIQNT BY ENGINEERING PROFESSIONALS. Inc r �
FLAN VIEW IN MARQI W 1BY FOR SIR DRAQNG AND DRAINAGE INFORNATON.
COIIPACIED
BACIGFBI F1' VI I'� li.—I
1
PROFILE VIEW \ Qmr 2&4 CPS
S 25%
OVERFLOW SWALE PFEEmom 1.0E NAIVE SDILI
` STRAW BALE BARRIER DETAIL 1 ELEVATION
$,,
fly
\cu96 TJrEM "t Geri. lV>LL
\ \ �' / `10rW \ T•1 ra ecxo I. — J I
\ LOT T
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LOT 6 I
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i
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IAA III ='' v--�Cl it —I
1� I11=11=11=11=—I
SECTION
,• v
_
EAST 1/4 CORNER SECTION 22.
"N. R6VW
FDIIMD N REBAR
I"
IN LF. SET PENCE
PAN
11
--
�1 5017 All -
U
SILT FENCE
LITHE
ATTACH SILT FENCE
BETNEEN LATHE 4
POSTS W/1 1/4'
ROOFING NAILS
DETAIL
jA�
CKFlA E%CAVAIEDENCI
RUNOFF FLOW
NAIVE SQL
SECTION A
1. INSPECT AND REPAIR FENCE AFTER EACH STORM EVENT. REMOVE SEDINENT WEN
S' OF THE HEIGHT OF THE FENCE HAS BEEN FILLED. REMOVED SEDIMENT SHALL
BE PLACED IN TOPSDIL RILE.
SEDIMENT CONTROL FENCE
RI AP
EP ON lY
iED B BEYOND 'ry14. NA4.\Eb�
WNEL SLOPE/
I.F. PENCE \ \\\\ 11
\ BFE • 6013.00
SPRING CREEK \t \ \\
080102 011C
LOT 6
I
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-
/ CALL
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SCALE C=CO'
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C 8 RENSED W RIPNAR XLY Im >18-01Q Domewta B F.1 rs• u•r wr e~. u 0211
N0. I BY I DALE I REASON DESCRIPTICIN
NPPONO WE PAOECT M0. rry��1 Aapa-0a1 aT/tl
LOTS 4 & 5
SPRING CREEK PROFESSIONAL PARK
K]
_ II III ,r
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NDRTHEAST CDRNEA SECTION22,
TV NOTIFICATION ITN. RBRW
OF COLORADO FODHD N REPAIR
u922m98Z
•6700 UZZO
EGS DAY$ N ADVANCE
QAA°IL<m Of1�RMA� City of Fort Collim, Colorado
BER UTILITE6. EROSION �C�O��OL� PLAN APPROVAL
APPROVED:. aYf�Nif•�Y09M/6L
BbemM4r UWIt/ GM
EROSION CONTROL
PLAN