HomeMy WebLinkAboutSite Drainage Planf _
EX STORM INLET. i
0S-N1A - I' ,.,
-- -- 0S-N1B _ - -
- - - - . 0S-N1C
-_- - - -
- _r_ -
OFFSITE STORM SEWER
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798STORM INLET.
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12 -_,
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V I, WATER QUALITY SWALE
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rl y
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I ' 4rl 1`V
I - DE-02A
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11 II o
5740 (BUILDINGA PERMIT GRADING SHOWN, WATER _. �' _ D E-02 B
i
/ / ` I Il II I✓ ` f _ QUALITY SWALES TREAT STORM WATER RUNOFF) j
V -' J -(INTERUM GRADING SHOWN. FINAL GRADING
& DRAINAGE DETAILED AT BUILDING PERMIT) \
_
DESIGN POINT SUMMARY - DEVELOPED DETENTION
DESIGN PT
EX Q25
DE Q5
DIET. REQ.
DIET. PROV.
POST DET
+/- Q
I.D.
(cfs)
(cfs)
(cf)
(cf)
Q25 (cfs)
(cfs)
02A
1.67
3.74
1,711
3,708
3.21
-0.53
02B
1.21
3.24
1,296
1,628
3.23
-0.01
02C
1.42
3.83
1,588
3,400
3.78
-0.05
3
2.41
7.04
TBD
TBD
5.75
-1.29
[1) DEVELOPED TIME OF CONCENTRATION ASSUMED EQUAL TO 10 MINUTES.
[2) RATIONAL C FACTORS ARE BASED ON THE PERCENT IMPERVIOUS FROM TABLE 6-5
OF CHAPTER 6OF THE MHFD- MILE HIGH FLOOD DISTRICT DRAINAGE CRITERIA
MANUAL.
[3) RAINFALL INTENSITY IS FROM THE NOAA 141DF CURVE FOR GLENWOOD SPRINGS,
SITE STORM WATER FROM STREET • I - 1 OFFSITE STORM SEWER
& PARKING FLOWS TREATED FOR a ;I t• _-_-_---- ROUTED THROUGH SITE.(TYP.)
WATER QUALITY (TYPICAL).
-4 V
_ _ r _
MANHOLE - - I v
ORIFICE BLEED
OFF. `. \..
WATER QUALITY SWALE
MANHOLE WITH-
1 ORIFICE BLEED OFF.
> > DETENTION %/ (PERMIT GRADING FOR ROADS SHOWN HATCHED, WATER
QUALITY MANHOLES TREAT STORM WATER RUNOFF) � E"-03
nD
ill !1;DETENTION
92A---
-+ -
CONNECT TO EXISTING STORM SEWER
`. f/� WATER QUALITY MANHOLE,
_� ,'/ SIZED TO TREAT DE-02C3
TIT' i � it �,
11 r - ;. - /� f - RE. CIVIL PERMIT PLANS. D E-02 C
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{INTERUM GRADING SHOWN. FINAL GRADING
2-YR POST DEVELOPMENT PEAK RUNOFF SUMMARY
BASIN
I.D.
IMPERVI
OUs
CZ
0.47
0.38
12
(in/hr)
1.55
1.55
AREA
(acres)
2.447
0.748
Q2
(cfs)
L782
0.441
DE-02A
60%
DE-02B1
50%
DE-020
91%
0.75
1.55
0.746
0.867
DE-02C4
100%.
0.83
1.55
0.310
0.399
25-YR POST DEVELOPMENT PEAK RUNOFF SUMMARY
BASIN
I.D.
IMPERVI
OUS
C25
Its
(in/hr)
AREA
(acres)
Q25
(cfs)
DE-02A
60%
0.65
3.78
2.447
6.011
DE-02B1
50%
0.60
3.78
0.748
1.697
DE-020
91%
0.82
3.78
0.746
2.312
DE-02C4
1 100%
0.88
3.78
0.310
1.031
100•YR POST DEVELOPMENT PEAK RUNOFF SUMMARY
BASIN
I.D.
IMPERVI
OUs
ClDD
Ilex
(in/hr)
AREA
(acres)
QIOD
(cfs)
DE-02A
60%
0.73
4.85
2.447
8.662
DE-02B1
50%
0.69
4.&5
0.748
2.504
DE-020
91%
0.85
4.85
0.746
3.075
DE-02C4
100%
1 0.89 1
4.85
0.310
1.338
& DRAINAGE DETAILED AT BUILDING PERMIT) o I I
OS-S1 _f
1 1
Cl� \_, WATER QUALITY MANHOLE, ,.- __'- • __
SINGLE STORY J WATER QUALITY SWALE �t �\`� /
SINGLE STORY � 7 \\, / SIZED IL TREMIT PLANS.
i I
/ 1 I BUILDING x / \\x\ /� l RE: CIVIL PERMIT PLANS.
BUILDING 1 � � � f
DETENTION
MANHOLE WITH
ORIFICE BLEED OFF.
DP"
f
OZB. CONNECT TO EX. -
1 EXISTING STORM SEWER
STORM STRUCTURE. \ \
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DP
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EX. STORM SEWER PIPE DAYLIGHTS DP O S-SZ t
AT MITCHELL CREEK. _ -^ S1 D � MD wear Xm � W _
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GRAPHIC SCALE
DRAINAGE LEGEND 50 D 25 so I0o 200
-- -- - - - - - EXISTING CONTOUR
-7900 EXISTING CONTOUR INTERVAL ( IN FEET)
PROPOSED CONTOUR 1 Inch = 50 ft.
S725 EXISTING CONTOUR INTERVAL
POST DEVELOPMENT DRAINAGE BASIN
DP DESIGN POINT
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DATE: 03-01-2024
JOB NO.
30017
DESIGNED BY
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CHECKED BY
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I DATE I REVISION I
TITLE
®
ONSITE
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DRAINAGE
PLAN
Know what's below.
Cali before you dig.
DRAWING NO.
CALL 2-BUSINESS DAYS IN ADVANCE
BEFORE YOU DIG, GRADE, OR EXCAVATE
/� r.0
C-Jr.
FOR THE MARKING OF UNDERGROUND
MEMBER UTIUTIES