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Engineering Consultants
209 S. Meldrum
Fort Collins, Colorado 80521
303/482-5922
FAX:'303/482-6368
May 3, 1993
Mr. Glen Schluetter
City of Fort Collins
Utility Services Stormwater
235 Mathews Street
Fort Collins, Colorado 80522
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RE: 1stBank at Foothills Drive
Drainage Certification
PROJECT NO.: 519-002 # ct Y 3 0 2/5-
Dear Glen
As of this date, all of the drainage improvements, as shown on
Sheet 3 of the Utility Plans (Grading., Drainage, Erosion Control
Plan), and as described in the Final Drainage Report have been
installed.
The curb inlet was installed per the modified detail forwarded to
your office for review prior to construction, and as attached to
this certification with the modifications noted. A high point has
been created by the new curb and gutter and asphalt which does keep
the large majority of the developed runoff on -site, and from
flowing onto the Frontage road. The grading concepts, as shown on
the grading plan have been substantially complied with.
In summary, the drainage improvements for the 1stBank at Foothills
Drive should perform in compliance with the intent of the drainage
report.
Thank you for your time and consideration of this Certification
submittal.
.,��mlllllllllNu,,.
Sincerely,
RBD Inc. Engineering Consultants
27362
Roger Curtiss, P.E. %xF°°..�„ee."�6���`
. /�Q gher as y
to % r —�� r ¢therOffices: Denver3t45 526•Vail303/476-6340!
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E PERMANENT i TEMPORAFFTIJ°'
7 BUILDING I MODULAR
AB 'I 1 BUILDING k I'.,
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2 F.F. - 27.0 1 IMETHEPETER
1A, IN Ill
.08 11 1CARL) STEP
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I ` `'SSN�NT
dal A p T
AWW FOOTHILLS DRIVE
-27 M
n. SURE NJ .2X 26 R
TE
Are
MUTE, ALL ISE C' VNLES$
OTHERWISE NOTED
A
INET o exist. AB'
Smw MAIN
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ISCGosEn u in by 1m Be
LMXNLNN. REVALLON - a DO
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SCALE 1'=P0'
-- - - DCN DUB RAC
Engineering Consullanls
pe 3_ _ nEL I1)92 19-DG2
n
EXISTING SITE HYDROLOGY
Total Area: 1.02 cc.
Rational 'C''. 0.20
DRAINAGE BASIN STAPSPCS
Grows, Platted Area: 0 941? a
Goss Area B V 0.95' o.
Net Platted A Si94V ac
Net Platted A Basin C : O.951 DEC.
Onite Deter Oon. None
Sol: 1 2 5
EROSION CONTROL NOTES
After the cannot grodmir has been Then
completil ;r. x beck dams
nlet
W
Shaft be installed as shown an the Plana, and ovme check
el i
shall be installed on the e.btinq a Inlet in �Ne Sleeie i
parking lot and the combination inlet located A the Frontage Rwtl
at the northeast corn t to 't M n n l o pEAetl in all
areas not located 'n d y p g d the
temporary motlNar building area The murch s OJT be hay or site,
and applied of a rote of2 toi old sh ll be
adequately anchored tacked, or he Sol After
installation of the rea, curb sell t en tHNIT come of the
project• o curb shift gravel filter shall b t led per the
details shown on the construction plans.
The Twos rod Po ng a was snaulu rec ve Ins pavement structure
as shoson as possible, weather permitting If preling cannot happen
*,thin six e fter oven at grading.aggregatex o course
shall binstalled the a. s that Air rel p t far use
as a mulch. d rhos be applied t m rate of 135
tons/ocre.
Once all improvements haw been completed a I bore grooms
protectetl the inlet gravel Nters can be m bi
ALL SPOT ELEVATIONS SHOWN ARE
FLOWLINE OR TOP OF PAVEMENT.
1
LEGEND
y„� `„w f. Xl$PNL MANHOLE
"f9FX1YS.1 rNG'Y'nL:v DRANT EXISTING FIRE HYDRANT
0 REMAIN
FxISnnG CONTOUR
1 _25PROPOSED CONTWIP
-- - — FLDW.INE
/...00 INFLOW CURB A GUTTER
—. — WTFALL CURB R GUTTER
FF FINISHED FLOOR ELEVATION
EXISTING SPOT ELEVATION
PROPOSED SPOT ELEVATION
DIRECRM OF DRANAGE FLOW
DESIGN PgNT
Mr 1 I RE01 DRAINAGE BASIN BOUNDARY
BASIN NUMBER
1M��AC BASIN AREA
I DRIVEWAYSAND TRUCK
LOADING
I'.II LOADINGGAREAS
OCURB INLET GRAVEL FILTER
STRAW BALE CHECK DAM
LIMITS GE 100 M. FIOWPLAIN
PAVEMENT THICKNESS ALTERNATES:
Passenger Car P_ Ain3
Aspholt Concrete
2 1/2-
Crush a Age gels Bose Course
6"
Totat Pmornent Thickness
B 1/P'
Aspn C t to
rim.T Mi. IL,
Tons Base Course
Total F.,dmet
Thickness
4 1/2-
Nwreinforcel Concrete
5'
Driwwofs and Truck Loading Areaz
Aspnal Corlpele
d'
Crushed Agr{egThe
Base Course
B'
Total Pa.I1LArt
Thickness
1
Pike
te
2
Plant All, BI
UP hour Base Crone
d'
Total Par
I Thickness
T MAY 941993
A face
tarn Pl.
r
1ST BANK AT FOOTHILLS DRIVE
FORT COLLINS, COLORADO
LECSLIIT PLITA/L ANT':'''A
.
lT
iF£CKEC (sY;
Wa
CeIECRED Site:
SAXTRANAR i:oW.
Den
CHECKJO BY:_
Alit
PW WsfTLfbn
fMs
CHECKED BY:
�M
Grullalr ¢
CHECKED BY'.
TLiJAGE �et FICaTC,J
�'.`
GRADING. DRAINAGE.
EROSION
CONTROL
AND UTILITY
PLAN
4
31