HomeMy WebLinkAboutTract 17881AW
An
40
On
HYDROLOGYSTUDY
CITY OF FONTANA
TRACT NO.- 17881
PREPARED FOR
SPECTRA HOMES LLC
521-1/2 MYRTLE #201
MONROVIA, CA 91016
626-305-9444
%W LOREN PHILLIPS & ASSOCIATES.) INC.
.M 22632 GOLDEN SPRINGS9 #350
wo DIAMOND BAR9 Ca 91765
OR Phone 909-396-9636
Aw Fax 909-396-1656
Email: IDacivilA
,aol-com
Aw
fw Aaa: kgew-..v
*e� IV vs;(197
do
OHN COLLISTER
RCE 12764
EXPIRES 03-31-07
p
w
I (ca -CA -25- 110
FIECEIVEQ
UEC 2 7 NN
a8it vfREAU VER�ITTAS
S ANA
N
0
no
Ow
wa
Table of Content
introduction ......................................................................
3
Discussion and Summary .......................................................
ww
Vicinity map .....................................................................
7
Frn Values for typical cover type .............................................
8
Rainfall depth versus return period ...........................................
*
9
Aw
Offsite Hydrology Calculation ..... ............................................
Onsite Hydrology Calculation, Pre -Developed .............................
16
Onsite Hydrology Calculation Post -Developed .........................
... 23
30
Hydrology Maps ................................................................
.... 34
AerialPhoto ....................................................... ***'*'*****
36
FloodZone Map ................................................................
39
Isohyetal Maps ..................................................................
42
Hydrology Soils Group Map ..................................................
44
Reference Hydrology Tract No. 17513 ......................................
no
Ow
wa
M
4W
L::3
do INTRODUCTION
"a This property is located on north of Harvey Drive, East of Oleander Ave,
40 west of Cypress Ave in city of Fontana. It is being subdivided into 17 lots
with an area of 4.1 acres. Pre Developed and Post Developed hydrology
calculations are provided in this report. If you had any questions don't
hesitate to call Loren Phillips office at 909-396-9636.
PURPOSE.
The purpose of this report is to calculate the runoff at the pre developed
condition and post developed condition and verify the existing improvement
and street (Harvey Drive) has adequate capacity to carry the run off for 25
year and 100 year storm after development of the subjected property.
In this report results of previously approved hydrology report for tract no.
17513 have been used. This report was done by Loren Phillips and
Associates and is attached as the reference to this report.
*0 DESCRIPTION OF WATERSHED
9W All tributary areas are shown on the hydrology map. As shown on the
hydrology map sub area's A,D and E are the offsite area.
Sub area B shows the onsite pre developed area. 25 year storm runoff is 5.4
CFS and 100 year storm runoff is 7.5 CFS for sub area B.
Sun area C shows the onsite post developed area. 25 year storm runoff is
10.4 and the 100 year storm runoff is 13.5 for this sub area.
See the hydrology map for more detail.
r-1
METHODOLOGY
This report is based on San Bernardino County Hydrology Manual. Rational
method was used to do the hydrology calculation for 25 and 100 year storm.
Rational method relates rainfall intensity, runoff coefficient, and drainage
area size to the peak runoff from the drainage area. By using isohyetal maps
in section B of the manual and using hydrologic soils group map in section
C and the rational method discussed on section D runoffs were calculated.
"a
AW
0
10
40
DISCUSSION AND SUMMARY
Based on the Flood Insurance Rate Map # 06071C8652 F downloaded from
aw FEMA website this property is located in zone X and therefore it is protected
from the flood. The flood map is attached to this report for city review.
aw Based on the hydrology calculation in this report development of this tract
will increase the runoff 5.0 CFS for the 25 year storm and 6.0 CFS for the
100 year storm and per the hydraulic calculation from the reference
hydrology report (Tract No. 17513) there is adequate capacity in the
receiving street down stream to carry both the existing runoff and the
aw increased runoff after development of the subjected property.
The Hydrology table below shows clearly the summary of all the hydrology
and hydraulic calculations in this report.
0
oft
1W
0,
0
0-
0-
N
.M
Aw
Q
(CFS)
Subject
property Runoff
Tract 4 17513
Q25
Pre Developed
6.6
Q25
Post Develop�d
13.3
Q100
Pre Developed
9.5
-
Q100
Post Developed
17.6
-
Total Runoff Capacity of Runoff
Down stream of Harvey Dr. Increase
Harvey Dr. (Worst Case) From pre developed
.-'k Ar A -V n -I (rvq) TO DOst developed
26.9
- 44.29 6.7
33.6
37.5 91.0 8.1
45.6
Table 1. Hydrology and Hydraulic Summary from the reference hydrology
report Tract No. 17513.
4w
M
0
Am
VO
RM
so
Table 2. Hydrology and Hydraulic Summary for the subject
Property Tract #17881
do
M
N
I=
Uw
0
0
M
0
M
"a
40
Subject
property Runoff
Tract # 17881
Total Runoff
Down stream of
Harvey Dr.
(MAX Q)
Capacity of
Harvey Dr.
(Worst Case)
(CFS)
Runoff
Increase
From pre developed
To post develope
Q
(CFS)
Q25
Pre Developed
5.4
26.9
44.29
5.0
Q25
Post Developed
10.4
31.9
-
Q100
Pre Developed
7.5
37.5
91.0
6.0
Q100
Post Developed
13.5
43.5
I
I
Table 2. Hydrology and Hydraulic Summary for the subject
Property Tract #17881
do
M
N
I=
Uw
0
0
M
0
M
"a
40
q*
do
go
10
p
I
VICINITY
dw MAP
"a
sw
.m
mw
om
mo
m
0
m
vs
AV
.m
aw
Street Atlas USA@ 2005
FA
40
Im
aw
"M
aw
aw
40
M
in
ow
TABLE C.2. Frn (ifi/hr) VALUES
FOR TYPICAL COVER TYPES
SOIL GROUP
COVER TYPE AP (1) A B. C D
NATURAL:
1.0
0.41
0.27
0.18
0.14
Barren
Row crops (good)
1.0
.0.59
0.41
0.29
0.22
Grass (fair)
1.0
<��
0.56
0.40
0.31
Orchards (fair)
1.0
o.88
0.62
0.43
0.34
Woodland (fair)
1.0
0.95
0.69
0.50
0.40
URBAN:
Reside ntial (1 DU/AC)
o.80
0.78
0.60
0.45
0.37
.
Residential (2 DU/AC)
0.70
0.68
0.53
0.39
0.32
Residential (4 DU/AC)
0.60
(�D
0.45
0.34
0.28
Residential (10 DU/AC)
0.40
0.39
0.30
0.22
0.18
Condominium
0.35
0.34
0.26
0.20
0.16
Mobile Home Park
0.25
0.24
049
0.14
0.12
0.20
0.19
0.15
0.11
0.09
Apartments
Commercial/Industrial
0.10
0.10
0.08
0.06
0.05
NOTES:
(1)
Recommended ap values from Figure C-4
(2)
AMC 11 assumed for all Fm values
(3)
CN values obtained from Figure C-3
(4)
DUJAC=dwelling unit per acre
c-16
10 3.5 ---------- 3.5
ow 2.5 2.5
w
aw X:
0 ---------- ---------
z
z 2
2
CL
uj
_j
_j N 1.5
'4 1.5 000
U -
z
71 � _..
cc
aft 5;01
40 0.5 ------ 0.5
-----------
to
40
10
0 2 5 10 25 50 100
RETURN PERIOD IN YEARS
40 NOTE,
1. FDR INTERMEDIATE RETURN PERIODS PLOT 10 -YEAR AND loo -YEAR ONE HOUR VALUES FROM MAPS,
GIVEN 10 -YEAR
10 THEN CONNECT POINTS AND READ VALUE FOR DESIRED RETURN PERIOa FOR EXAMPLE
014E HOURlO.95"AND loo-YEAReNEMOLIR &I.Se,25-YEAR ()NE HOUR tt-18"-
REFERENCE,NOAA ATLAS 2,V0LUME=-CAL.,I9T3 RAINFALL DEPTH VERSUS
ow
om SAN BERNARDINO COUNTY RETURN PERIOD FOR
im HYDROLOGY MANUAL PARTIAL DURATION SERIES
0
0
m
to
OFFSITE HYDROLOGY CALCULATIONS
259 100 YEAR STORM
0,
0
0,
0
I I a I a I a I a J a I a I I I I I I I I I I I I I I I I I I I a I a I a A
CD
ofharvey25-form
---------------------------------------------------------------------- ---------------------------
I I OFFSITE HYDROLOGY 25 YEAR STORM
----------------------- --
----------------------------------------------------------------------------------------------------------------------------
Project: ofharvey.rsb Page 1 Cal cul ated By:
study Date: 10/14/05 checked By:
25.0 Year storm I
******R A T 1 0 N A L H Y D R 0 L 0 G Y - S A N 8 E R N A D I N 0 C 0 Hydrology Manual Date - Audust 1986 *******
station/ soil Type Devel. Area I Fm Fm avg Q Q Slopelsection . V L T I Hydraulics
Point N0.1 A,B,C,D Type (Acresdin/h in 1(sub) Total v/hz_ Fps ft.1mTin.1 mcin.1 or notes
---------------- ------ ------- I ---- ------ ------ 1- -1 ---- ----- ---------------
I ----- ------ ----- ------- ---- ---------------
--------- ---------------- ------ ------ :1:::: ::::: - ------ ----- ------ - 0.01 INITIAL SUBAREA
—1-TT21 -----
2.001 A-100% U-aV9 2.31 2.3 0.81 0.81 3.0 ------ ----- ------- -- 1 22.01 ---------------
--------- I ---------------- ------ - ---- ------ ------ ----- ------ ----- ------- ---- I ----- I ---------------
Effective area .27 (AC.) Total study area = 2.27 (AC.) Peak flow rate 3.043 (CFS)
AP = 1.000 scs curve (AMC II)= 50.00
---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ---------------
---------- ---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ---------------
--------- ---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ----- ---------------
---------- ---------------- ------ ------- ---- ------ ------ ----- ------ ----- ---- - ---- ---- ---- ---------------
---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
---------------- ------- -------- ------ ----- ---- ---- ---- ---- ----- ---------------
------ ----- --- ---- ---- ----- ---------------
---------- ---------------- ------ ------- ---- ------ ------ ----- ---- ----
--------- ---------------- ------ ------- ---- ------ ------ ----- ------ ----- ----- ----- ---------------
---------------- ------ ------- ---- ------ ------ ------ ----- ------- ---- ---- -
7 -------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ----- --- ----- ---------------
---------- I- -- ---- ---- ---- ----- ---------------
--------- ---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ---------------
---------- ---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
--------- ---------------- ------ ------- ---- ------ ------ ----- --- --- ----- ------- ---- ---- ---- ----- ---------------
--------- ---------------- ---- -- I ----- ---------------
-- ------- I ---- ------------- ----- ------ ----- ------- ---- ---- -- I
--------- ---------------- ------ ------- ---- ------ ------ ----- I ----- ------- ---- ---- ---- ----- ---------------
--------- ---------------- ------ ------- I ---- ------ ------ ----- I ------ ----- ------- ---- ---- ---- ----- ---------------
---------------- ------ ------- ---- ----- ------- ---- ---- ---- ----- ---------------
---------------- ------ ------- ---- ------ ------ ----- ------- ---- ---- ---- ----- ---------------
---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- --- ---------------
- - - - - - -- -- -- -- -- -- -- -- -- -- I -- -- -- -- - - ------- ---- ------ ------ ------ ----- I ------- ---- ---- ---- ----- ---------------
version 7.1 Copyright (c) CIVILCADD/CIVILDESIGN, 1989 - 2005
----------------------------------------------------------------------------------------------------------------------------
Page I
I I a I a I a I a I a J a I I I I I I I I I a I I I I I a I a I a 1 9 J a I
.W-
96
ofharveylOO-form
---------------------------------------------------------------------- -------------------
OFFSITE HYDROLOGY 100 YEAR STORM
---------------------------- --
----------------------------------------------------------------------------------------------------------------------------
Project: ofharvey100.rsb Page I calculated BY:
Study Date: 10/14/05 checked By:
100.0 Year Storm I
******R A T 1 0 N A L H Y D R 0 L 0 G Y - S A N B E R N A D I N 0 C 0 Hydrology manual Date Audust 1986 *******
Station/ soil Type Devel. Area I F Fm Q I Q Islopelsection V L T TC I Hydraulics
Poi A,B,C,D Type (Acres) in/h inm/hr lin/gvrgl(sub) Total_ v/hz I Fps ft. min min -I or notes I
---------------- ------ ------- ---- ------ ------ I ----- ----- ----- ------- ---- ---- ---- ----- ---------------
---------------- ------ ------- ---- ------ -- ------ I ----- ------- ---- ---- ---- ---- --------------
--------- ---------------- ------ ------- ---- ------ -- ------ 1 0.01 617 22 , 0 ----- JINITIAL SUBARE�J
A-100% U-avg 2.3 2.7 0.81 0.811 3.9 ----- I ------- ---- ---- ---- 22.0 ---------------
---------------- ------ ------- ---- ------ I ------ ----- ------ I ----- I ------- ---- ---- ---- ----- I ---------------
Effective area 2.27 (AC.) Total study area = 2.27 (AC.) Peak flow rate 3.942 (CFS)
AP = 1.000 SCS Curve (AMC II)= 50.00
------ ---- ------ --- ----- ------- ---- ---------------
--------- ---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
--------- ---------------- ------ ------- ---- ------ ------ ----- ------ ----- --I ---- ---- ----- ---------------
------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------ ----
----------- --- ------ ---- ---- ----- ---------------
---------------- ------ ------- ----- ------ ------ ---- ---- ----- ----------
---------------- ------ ------- ---- ---- --- -----
---------------- ------ ------- ---- ------- ---- ---- ----- ---------------
---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---------------
------ ------ ----- ------ ----- ------- ---- ---- ---- ----- --------- - -
--------- ---------------- ----- ---- ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
--------- ---------------- ------ ------------ ------ ------ ----- I ------ ----- ------- ---------------
---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- -------- ------
7 ------ ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- --- -------
---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
--------- ---------------- ---- I ---- ---- ----- ---------------
--------- I ---------------- ------ ------- ---- ------ ------ ----- ------ ------- ---- ---- ---- ----- ---------------
--------- ---------------- ------ ------- ------ ---- ------ -
---------------- ------ ------- ------ ------ ----- I ------ ----- ------- ---- ---- ----- ---------------
----- ---------------
----- ---------------
version 7.1 copyright (C) CIVILCADD/CIVILDESIGN, 1989 2005
----------------------------------------------------------------------------------------------------------------------------
Page I
a I a I a a a a a I a J I I I I I I I I I I I I I I a I a I a i a J a a a A
OFC2 5
---------------------------------------------------------------------- --
OFFSITE HYDROLOGY TRACT 17881
11 25 YEAR STORM, SUB AREA C
----------------------------------------------- --
----------------------------------------------------------------------------------------------------------------------------
Project: OFC25.rsb Page I calculated By:
study Date: 10/27/05 Checked By:
25.0 Year storm I
******R A T 1 0 N A L H Y D R 0 L 0 G Y - S A N 8 E R N A D I N 0 C 0 Hydrology manual Date - Audust 1986 *******
station/ soil Type Devel. Area I F Fm Q Slope section V L T Tc I Hydraulics
Point No A,B,C,D Type (Acres) in/hiinm/hr I i n/ahvrg I (sQub) Total v/hz Fps ft. min. min. or -notes
---------------- ------ ----- ---- ----- ------ ----- ------- ---- ---- ---- ----- -- ----------
---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- I ---------------
--------- - 0.01 640 12.3 ----- JINITIAL SU0APEAJ
2.00 A-100% 4 /ac 2.3 3.1 0.59 0.59 5.2 ------ ----- ------- ---- ---- ---- 12.31 ---------------
--------- I ---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- I ---------------
Effective area 2.30 (AC.) Total study area = 2.30 (AC.) Peak flow rate 5.205 (CFS)
AP = 0.600 SCS Curve (AMC ii)= 32.00
-1 ---- ---- ---- ----- ---------------
--------- ---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- I ----- ---------------
--------- ---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
--------- ---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ----
--------- ---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
--------- ---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
--------- ---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
--------- ---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
--------- ---------------- ------ ------- ---- -----
--------- ---------------- ------ ------- ---- -----
--------- ---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
--------- ---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
--------- ---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
---------------- ------ ------- ---- ------ ---- - ----- ------ ----- ------- ---- ---- ---- ----- ---------------
--------- ---------------- ------ ------- I ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
---- I ---- ------ ------ ----- ------ ------- ---- ---- ---- ----- ---------------
--------- ---------------- ------ ------- ---- ------ ------ ----- -
------- I ---- ------ I ------ ----- ------ ----- ------- ---- ---- ----
---------------- ------ ------- ---- ------ ------ ----- ----------- ----- ---------------
----------------
version 7.1 copyright (c) CIVILCADD/CIVILDESIGN, 1989 2005
------------------------------------------------------------------------------------------------------------------------------------
Page 1
I I a I a A & A a a a 1 9 1 a I a A a I a I a I I I a 1 9 J a I a A a J a A
P
OFC100
---------------------------------------------------------------
OFFSITE HYDROLOGY TRACT 17881
100 YEAR STORM, SUB AREA C
-------------------------------------- --
----------------------------------------------------------------------------------------------------------------------------
Project: OF:c25.rsb Page I calculated By:
study Date: 10/27/05 checked By:
100.0 Year storm
******R A T 1 0 N A L H Y D R 0 L 0 G Y - S A N B E R N A D I N 0 C 0 Hydrology Manual Date Audust 1986
Station/ soil Type Devel.1 Area I I FM FM aVg Q I Q slopelSection v L T TC I Hydraulics
Point NO A,B,C,D Type (Acres)lin/h in/hr in/hr (sub) Total v/hz FPS ft. min. min.1 or notes
---------------- ------ ------- ---- ------ ------ ----- I ------ ----- ------- ---- ---- ---- ----- --------------- I
---------------- ------ ------- -- ----- ------ ----- ------- ---- ---- ---- ----- I --------------- I
---- ------ ------ ----- 0.01 640 12.3 ----- JINITIAL SUBAREA1
2.00 A-100% 4 /ac 1 2.31 3.9 0.59 0.59 6.8 ------ ----- 12.3 ---------------
--------- I ---------------- ------ I ------- I ---- I ------ ------ ----- ------ ----- ------- I ---- ---- ---- ----- ---------------
Effective area 2.30 (AC.) Total study area = 2.30 (AC.) Peak flow rate 6.816 (CFS)
AP = 0.600 SCS Curve (AMC II)= 32.00
---------------- ------ I ------- --- ----- ------ ----- I ------- ---- ----- ---------------
I ---- I ------ ------ ----- ------ - ----- I --------------
--------- ---------------- ------ ------- ------ ------ ----- ------ ----- ------- ---- ---- ---------------
-------------
---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
---------------
---------- ---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
--------- ---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- -------- ----------
---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
--------- ---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- I ----- I ---------------
--------- I ---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
---------- ---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
---------- ---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
---------- ---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
---------- ---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
--------- ---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
--------- ------ ---- ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
---------------- ------ -- - ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
---------- ---------------- I ------ I ------- I ---- ------ I ------ ------ ----- ------- ---- I ---- ---- I ----- ---------------
version 7.1 Copyright (C) CI ILCADD/CIVILDESIGN, 1989 - 2005
----------------------------------------------------------------------------------------------------------------------------------------------------------
Page 1
I I a I a I a A a A & J a i I I I I I I I I I I I I I I I I I I a 1 9, 1 W A
C-1
1P
OFD25
---------------------------------------------------------
OFFSITE HYDROLOGY TRACT 17881
25 YEAR STORM, SUB AREA D
-------------------------------------- --
----------------------------------------------------------------------------------------------------------------------------
Project: OFD25.rsb Page 1 calculated By:
study Date: 10/27/05 checked By:
25.0 Year storm I
******R A T 1 0 N A L H Y D R 0 L 0 G Y - S A N B E R N A D I N 0 c o Hydrolog! manual Date - Audust 1986 -------
Station/ Soil Type IDevel. Area I Fm Fm avg Q Q SlopelSection V L T Tc I Hydraulics
Poi A,B,C,D Type I(Acres) in/h in/hr in/hr (sub) Total v/hz_ FPS _ ft. min min or notes
------- ---- --- --- -- ----------
- ------- ---------------- ------ ------- ---- ------ ------ ----- 0.01 400 10.1 ----- INITIAL SUBAREA
--- 2.001 ---------- A-100% 4 -/ac - ---- 1.9 -3.5 --0.59 --0.59 --4.9 ------ ----- ------- ---- ---- ---- - 10.1 ---------------
I ---------------
---------- I ---------------- ------ ------- ---- I ------ ------ ----- ------ ----- ------- ---- ---- ---- ---- I ---------------
Effective area 1.89 (AC.) Total study area = 1.89 (AC.) Peak flow rate 4.940 (CFS)
AP = 0.600 SCS Curve (AMC II)= 32.00
---------------- ------ I ------- ---- I ------ ----- ------- ---- ---- I ---- ----- ---------------
I ------ I ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
--------- ---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
---------------- ------ ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
--------- ---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
--------- --- ------------ ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
--------- ---------------- ------ ------- ---- ------ ------ ----- ------ ----- -------
- ------- ---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
-------- ---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
--------- ---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
---------------
---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
---------------
----- ---------------
---------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ----
---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
--------- ---------------- ------ -------
--------- ---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
--------- ---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
--------- ---------------- ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
---------------- ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
version 7.1 copyright (C) CIVILCADD/CIVILDESIGN, 1989 - 2005
----------------------------------------------------------------------------------------------------------------------------
Page 1
A a I a I a I I I I I I
OFD100
---------------------------------------------------------------------- ---------------
OFFSITE HYDROLOGY TRACT 17881
100 YEAR STORM, SUB AREA D
-------------------------------- --
----------------------------------------------------------------------------------------------------------------------------
Project: OFD25.rsb Page I calculated By:
study Date: 10/27/05 Checked BY:
100.0 Year Storm I
******R A T 1 0 N A L H Y D R 0 L 0 G Y - S A N B E R N A D I N 0 C 0 Hydrology Manual Date Audust 1986 *******1
station/ I soil Type Devel.J_ Area_ I Fm JFM avg Q I Q slope section v L T TC I Hydraulics
Point No.1 A,B,C,D Type J�Acres) in/hiin/hr-lin/hr (sub) Total Iv/hz Fps ft. min.1 mind or notes
--------- I ------------ --- - I ------- ---- I ------ I - ---- ---- ---- I ----- ---------------
--------- I ---------------- ------ ------- ---- ------ I ------ ----- ------ 1-0.01 ------- ---- - 400 10.11 ----- JINITIAL - SUBAREA
2 001 .......... A-100% 4 /ac .... 1:9 _4:4 0.591 0.59 6.4 ------ ----- ------- ---- ---- ---- 1- 10.11 ---------------
------ :-- ------ ------ I - - - -1 ------ I ------ -- --- ------ ----- I ------- ---- ---- ---- ---- ---------------
Effective area 1.89 (AC.) Total study area = 1.89 CAC.) Peak flow rate 6.430 (CFS)
AP = 0.600 SCS Curve (AMC II)= 32.00
----------- --- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
--------- ---------------- ------ ------- I ---- I --- ------ ----- ------- ---- ---- ---- ----- ---------------
--------- ---------------- ------ ------- ---- ------ ------ ----- ------ I ----- ------- ---- ---- ---- ----- ---------------
--------- I ---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
--------- ---------------- ------ ------- ---- ------ ------ ----- ------ -----
--------- ---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
--------- ---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
--------- ---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- --- ---- ----- ---------------
---------- ---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
--------- ---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
---------- ---------------- ------ ------- ---- -- ---- ---- ---- --
---- ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
---------------- ------ ------- ---- --
---------- ---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
---- ---- ---- ----- ---------------
--------- ---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
--------- ---------------- ------ ------- I ---- I ------ ------ ----- ------ ----- ------- ---- ---- I ----- ---------------
version 7.1 copyright (c) CIVILCADD/CIVILDESIGN, 1989 - 2005
-----------------------------------------------------------------------------------------------------------------------------
Page 1
40
so
40
'A
im
sw
ONSITE HYDROLOGY CALCULATIONS
PRE -DEVELOPED CONDITION
259 100 YEAR STORM
4A
40
W^
i I a i a A a A a I i I I I I I I i I I I I I I I I I I I I a I a I & J a I
ONPRE25-FORM
---------------------------------------------------------------------- ----------
I I ONSITE HYDROLOGY 25 YEAR STORM, PRE DEVELOPED CONDITION
------------------------------------- --
----------------------------------------------------------------------------------------------------------------------------
Project: ONPRE25.rsb Page 1 calculated By:
study Date: 10/14/05 checked By:
25.0 Year storm
******R A T 1 0 N A L H Y D R 0 L 0 G Y - S A N B E R N A D I N 0 c 0 Hydrolog, Manual Date Audust 1986
Station/ I soil Type IDevel.1 Area I I I FM Fm aVg Q Q Slopelsection . v L T Tc I Hydraulics
Point N0.1 A,B,C,D IType I(Acres) in/h in/hr in/hr (sub) Total_ v/hz_ Fps ft. min min, or notes ...
---------------- ------------
---------------
------ ------- ---- ------ ------ ----- 0.01 1 640 20 61 ----- INITIAL SUBAREA1
--.--2.001 ---------- A-100% U-avg- 4.11 2.31 0.81 0.81 5.4 ------ ----- ------- ---- 20.6 ---------------
------- I ---------------- ------ ------- I ---- I ------ ------------ ------ ----- ------- ---- ----- I ---------------
Effective area 4.10 (AC.) Total study area = 4.10 (AC.) Peak flow rate 5.424 (CFS)
AP = 1.000 SCS Curve (AMC II)= 50.00
---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---------------
---------------- ------ ------- ---- ------ ------ ---- ----- ------- ---- ---- ---- ----- ------
------ ------- ---- ------ ------ ----- ------ ----- ------- ---- --- ----- ---------------
---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- 1 -1
---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- --- 7 --- ---------------
I d ------ ---------------
--------- ---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----------
---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- --------------------
---------------- ------ ------- ---- ------ ------ ----- ------ ----- -------
---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ---------------
-- ------- ---- ------ ------ ----- ------ ----- --- ---- ---- ---- ----- ---------------
--------- ---------------- ------ ------- ---- ------ ------ ----- ------ ----- ----------- ---- ---- ---- -- 7 -- ---------------
---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
---------------- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
---------------- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- - ---------
---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ---------------
---------------
---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------ ---- ---- ---------------
I ------ ------- ---- ------ I ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
---------------- ------ ------- ---- ------ ------ ----- I ------ I ----- ------- ---- ---- ---- ----- ---------------
version 7.1 Copyright (C) CIVILCADD/CIVILDESIGN, 1989 2005
----------------------------------------------------------------------------------------------------------------------------
Page 1
0
qW
do San Bernardino County Rational Hydrology Program
4W (Hydrology Manual Date - August 1986)
do CIVILCADD/CIVILDESIGN Engineering Software, (c) 1989-2005
Version 7.1 Rational Hydrology Study Date: 08/14/06
------------------------------------------------------------------
Tract Number 17881
Onsite 25 year Hydrology
R
------------------ ------------------------------------------------
Program License Serial Number 4064
------------------------------------------------------------------
********* Hydrology Study Control information
--------------------------- --------------------------------------
Rational hydrology study storm event year is 25.0
Computed rainfall intensity:
Storm year = 25.00 1 hour rainfall = 1.199 (In.)
Slope used for rainfall intensity curve b = 0.7000
Soil antecedent moisture condition (AMC) = 2
..................................................................
.... Process from Point/Station 10.000 to point/Station
20.000
INITIAL AREA EVALUATION
RESIDENTIAL(3 - 4 dwl/acre)
Decimal fraction soil group A = 1.000
Decimal fraction soil group B = 0.000
Decimal fraction soil group C = 0.000
Decimal fraction soil group D = 0.000
SCS curve number for soil(AMC 2) = 32.00
40
Pervious ratio(AP) = 0.6000 Max loss rate(Fm)= 0.587
(In/Hr)
Initial subarea data:
Initial area flow distance 830.000(Ft.)
Top (of initial area) elevation = 46.000(Ft.)
Bottom (of initial area) elevation = 31.000(Ft.)
Difference in elevation = 15.000(Ft.)
Slope = 0.01807 S(5o")= 1.81
me
TC = k(O.412)*[(length^3)/(elevation change)1^0.2
Initial area time of concentration = 13.525 min.
Rainfall intensity = 3.402(In/Hr) for a 25.0 year storm
Effective runoff coefficient used for area (Q=KCIA) is C 0.745
Subarea runoff = 10.389(CFS)
Total initial stream area = 4.100(Ac.)
Pervious area fraction = 0.600
R
M
40
as Initial area Fm value 0.587(In/Hr)
End of computations, Total Study Area 4.10 (Ac.)
"M The following figures may
be used for a unit hydrograph study of the same area.
Note: These figures do not consider reduced effective area
effects caused by confluences in the rational equation.
Area averaged pervious area fraction(Ap) = 0.600
Area averaged SCS curve number = 32.0
.M
as
OM
OM
OM
go
OM
do
0
0
0
0
am
go
I I a A I A a A a I a i I I I I I I I I I I I I I I I I a I I I I J a
ONPRE100-FORM
---------------------------------------------------------------------- ---------
I I ONSITE HYDROLOGY 100 YEAR STORM PRE -DEVELOPED CONDITION
---------------------------- --
----------------------------------------------------------------------------------------------------------------------------
Project: ONPRE10O.rsb Page 1 calculated By:
study Date: 10/14/05 checked By:
100.0 Year storm I
******R A T 1 0 N A L H Y D R 0 L 0 G Y - S A N B E R N A D I N 0 C 0 Hydrology manual Date Audust 1986 *******
station/ Soil Type Devel.1 Area I FM �m avg Q I Q Islopelsection' V. Lt.1 T Tc I Hydraulics
Point_NO. A,B,C,D Type I(Acres) in/h in/hr- in/hr (sub) Total Jv/hz I ....... Fp f Imin mi n. or notes
----- --- ---------------- ------ I ------- ---- ----- ------ ----- ------ I ---- ---- ----- I ---------------
---------------- ------ I ------- ---- ------ ------ ----- ------ ------- ---- ---- I ---- ----- I ---------------
I ------- ---- --- K;i 640120.6 ----- JINITIAL_SUBAREA
A-100%1 4.1 2.9 0.81 0.81 7.5 ------ ------- 20.6 ------- -------
_ ?:av ---- ---- ----
-------------- F __?_ I ------- ---- I ------ ------ ------ ------ ----- ------- I ---- ---- I ---- ----- ---------------
Effective area 1.10 (AC.) Total study area = 4.10 (AC.) Peak flow rate 7.536 (CFS)
AP = 1.000 SCS Curve (AMC II)= 50.00
---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---------------
------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
--------- ---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- -- -- ---------------
--------- ---------------- ----- --- ---------------
---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- I ---- I--- I ---------------
----- ---------------
---------------
--------- ---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- I ---- I ----- ---------------
I I ----- ---------------
--------- ---------------- ------ ------- ---- ------ ------ ----- - ----- ------- ---- ---- ---- ----- ---------------
--------- ---------------- ------ ------- ---- ------ ------ ----- ------ ----- -----
--------- ---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
--------- ---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
--------- ---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- I ---- ---- ----- ---------------
--------- ---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
--------- ---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
--------- ---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ----
---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- --- -
------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
-------------- ------ ------- ------- ---- ---- ---- ----- ---------------
I I I I ---- I ----- I ---------------
version 7.1 copyright (C) CIVILCADD/CIVILDESIGN, 1989 2005
-------------------------------------------------------------------------------------------------------------------------------------------------
Page I
qM
r"7,
OR
do San Bernardino County Rational Hydrology Program
qP (Hydrology Manual Date - August 1986)
do CIVILCADD/CIVILDESIGN Engineering Software, (c) 1989-2005
Version 7.1 Rational Hydrology Study Date: 08/14/06
------------------------------------------------------------------
Tract Number 17881
100 year developed condition
aug. 14, 2006
------------------------------------------------------------------
Program License Serial Number 4064
-------------------------------------- ---------------------------
********* Hydrology Study Control Information
---------------------------------------------------------- -------
Rational hydrology study storm event year is 100.0
Computed rainfall intensity: 1.500 (In.)
Storm year = 100.00 1 hour rainfall =
Slope used for rainfall intensity curve b = 0.7000
Soil antecedent moisture condition (AMC) = 2
..................................................................
.... Process from Point/Station 10.000 to Point/S-11--ation
20.000 **** INITIAL AREA EVALUATION
RESIDENTIAL(3 - 4 dwl/acre)
Decimal fraction soil group A = 1.000
Decimal fraction soil group B = 0.000
Decimal fraction soil group C = 0-000
Decimal fraction soil group D = 0.000
SCS curve number for soil(AMC 2) = 32.00 0.587
ratio(AP) = 0.6000 Max loss rate(Fm)=
Pervious
(In/Hr)
44
Initial subarea data:
Initial area flow distance 830.000(Ft.)
40
Top (of initial area) elevation = 46.000(Ft.)
Bottom (of initial area) elevation = 31.000(Ft.)
Difference in elevation 15.000(Ft.)
Slope = 0.01807 s(%)= 1.81
TC = k(O.412)*[(length^3)/(elevation change)1^0.2
Initial area time of concentration = 13.525 min.
4.2-156(In/Hr) for a 100.0 year storm
Rainfall intensity =
Effective runoff coefficient used for area (Q=KCIA) is C 0.776
Subarea runoff = 13.540(CFS)
Total initial stream area = 4.100(Ac.)
Pervious area fraction = 0.600
0
go
Initial area Fm value 0.587(In/Hr)
End of computations, Total study Area 4.10 (Ac.)
The following figures may
be used for a unit hydrograph study of the same area.
Note: These figures do not consider reduced effective area
effects caused by confluences in the rational equation.
Area averaged pervious area fraction(Ap) = 0.600
Area averaged SCS curve number = 32.0
I=
go
WO
dw
0
0
0
40
go
in
do
do
ONSITE HYDROLOGY CALCULATIONS
POST -DEVELOPED CONDITION
25.) 100 YEAR STORM
do
ONSITE & OFFSITE HYDROLOGY MAP
PRE DEVELOPED CONDITION
MILLER AVENUE
------------ ------ Ir ------
SCALE 1 100
0342)�
lz
+
lug)
(1346)_
7_7
VACANTi LAND RESIDENfIAL
(1347) HOUS S
SUR ARE40'__ SUB 7EA(K)
A = 2.27 AC A = '.30 AC
1.=61 �� 1 1=64
(130)
I __�_,AH /= 11 1
TC 2 1 MIN Ki-- 12.3 MIN
Q25 3 CFS 025/= 5.2 CFS
Qloo= 31(L ) CFS Q Ao = 6.8 C FS
>1 1, z,
AREA@
A = —4—t—Ae-
1=640'
12.5'
TC -M-:6—M
Q25 5 4 CFS
7'5 CFS
V_
RESIDE41AL
- HOU�ES
SUB �PEA@
A =/ 1.89 AC
00'
7.2'
10.1 MIN
IQC2.5= 4.9 CFS
' Qioo= 6.4 C FS
. K
sm pd�
_W E%W
x
P.P.
x
ONSITE HYDROLOGY MAP,
POST DEVELOPED CONDITION
-- — — — — — — — — — — — — —q� — — — — — — —MILLER— AVENUE — — — — — — —
SCALE 1' 100
-w'. sit 41�4�pj
%
I
t340)
. ....... ..
VACANTi LAND RESIDENfIAL
HOUS y S
SUB ARE4(:D SUB
EA
A = 2.2 7 AC A 1.30 AC
1=6147' 1=64
TC 2�C MIN TC 12.3 MIN
Q25 3 FS Q2
'�= 5.2 CFS
Qioo= CFS Q 6.8 CFS
1345)
0/
ez
RESIDE41AL
(--e%
H01 I-tz)
SUB EA
A .1 A SUB/PEA@
1=8 1
A = 1.89 AC
AH 15' 0 00'
TC 13.5 MIN — 7.2'
025 8.7 C FS = 10.1 MIN
—7QIC2-. = 4.9 C Fs
�Qioo= 11.4 CFSP T5
Qioo= 6.4 CFS
-Q'o'
x
17
------------—--------------------------
x
I 1 8 1 a I a A i A & I I I a I I I I i I I I I I I I i a I I A k A I i & I
ONPOST25-FORM
---------------------------------------------------------------------- -------------------------
I I ONSITE HYDROLOGY 25 YEAR STORM POST DEVELOPED CONDITION
------------------------- --
----------------------------------------------------------------------------------------------------------------------------
Project: ONPOST25.rsb Page 1 calculated By:
study Date: 10/14/05 checked By:
25.0 Year storm
******R A T 1 0 N A L H Y D R 0 L 0 G Y - S A N� 8 E R N A D I N 0 C 0 Hydrolog Manual Date - Audust 1986
station/ I Soil Type Devel. Area I FM Fm avg Q I Q slopelsection V L T TC I Hydraulics
Point NO.1 A,B,C,D Type (Acres) i n/h in/hr in/hr (sub) Total v/hz FPS ft. min. min.1 or notes
---------------- ------ - ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
--------- ---------------- ------ ------- ---- I ------ ------ ----- 0.01 830 13.5 ----- JINITIAL SUBAREA
----- 2.001 ---------- A-100% 4 -/ac - 4.11 2.9 0.59 0-19 ------- ---- ---- ---- - 13 , 51 ---------------
--------- I ------ 7 --------- ------- ------ I ---- i ------ I ------ ---- ------- ---- ---- ---- ---- ---------------
Effective area 4.10 (AC.) Total study area = 4.10 (Ac.) Peak flow rate 8.651 (CFS)
* ******** AP = 0.600 SCS Curve (AMC I )= 32.00
---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
- ----- ------- ---- ---- ---- ----- ---------------
---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
---------------- - — --- ------- ---- ---------------
------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- -----
--------- ---------------- ------ I ------- ---- --------------
---------------- ------ ------- ---- ------ ------ ----- - I ----- ----- ------- ---- ---- ----
-- ------- ---- ------ ---- ---- ----- ---------------
---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ----- ---------------
---------------- ------ ------- ---- ------ ------ ----- --I ------- ---- ---- ---- ----- ---------------
--------- ---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
--------- ---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
--------- ---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
--------------- 7 ------ ------- - ---- — -------------
7 ----- ---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- -
--------- ---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
-------- ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
---------------- ------ ------- ---- ---- ------ ----- ------ ----- ------- ---- ---- ----- ---------------
--------- ---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ----- ---------------
---------------- ------ ------- ---- ------ ------ ----- ---- ---- ---- ---- ---- ----- ---------------
---------------- I 1 -1 ---- ::I::::: --:: ---- I ---- I ---- I ---- ----- ---------------
version 7.1 Copyright (C) CIVILCADID/CIVILDESIGN, 1989 - 2005
----------------------------------------------------------------------------------------------------------------------------
Page I
ONPOST25
da San Bernardino County Rational Hydrology Program
in (Hydrology Manual Date - August 1986)
CIVILCADD/CIVILDESIGN Engineering Software, (c) 1989-2005 version
7.1 Rational Hydrology study Date: 10/14/05
------------------------------------------------------------------------
ONSITE HYDROLOGY 25 YEAR STORM POST DEVELOPED CONDITION
aw
------------------------------------------------------------------------
Program License serial Number 4064
------------------------------------------------------------------ -----
a* ********* Hydrology study control information
-------------------------------------------------- 7 ----- ---------------
Rational hydrology study storm event year is 25.0
10 Year storm 1 hour rainfall = 1.000(In.)
100 Year storm 1 hour rainfall = 1.500(In.)
computed rainfall intensitg: 1.199 (in.)
storm year = 25 . Oo 1 our rainfall =
sl e used for rainfall intensity curve b = 0.6000
9� antecedent moisture condition (AMC) = 2
Sol
go
......................................................................
Point/Station 2.000
Process from Point/station 1.000 to
**** INITIAL AREA EVALUATIO N ****
RESIDENTIALO - 4 dwl/acre)
Decimal fraction soil group A = 1.000
Decimal fraction soil group B = 0.000
Decimal fraction soil group C = 0.000
Decimal fraction soil group D = 0.000
SCS curve number for soil(AMC 2) = 32.00
0. 587(In/Hr)
Pervious ratio(AP) = 0.6000 max loss rate(FM)=
initial subarea data:
initial area flow distance 830.000(Ft.)
TOP (of initial area) elevation = 46.000(Ft
(of initial area) elevation = 31.000�Ft-)
Bottom
Difference in elevation = 15.000(Ft.)
slope = 0.01807 s(%)= 1.81 .2
Tc = k(0.412)*[(lenjt1A3)/(elevation change)]AO
initial area time o concentration = 13.525 min.
intensity = 2.931(in/Hr) for a 25.0 year storm
Rainfall
Effective runoff coefficient used for area (Q--KCIA) is c 0.720
subarea runoff = 8.651(CFS) OO(AC.)
4.1
Total initial stream area =
Pervious area fraction 0.600
initial area FM Value 0. 587 (In/H r) 4.10 (AC.)
End of computations, Total study Area
The following figures may
be used for a unit hydrograph study of the same area.
Page
go
M
ONPOST25
Iw Note: These figures do not consider reduced effective area
As effects caused by confluences in the rational equation.
No Area averaged pervious area fraction(AP) = 0.600
Area averaged scs curve number = 32.0
go
Ow
ON
M
0
40
d§
0
Page 2
w �: 19- C
I J a J & a a A k I & J I I I I I I I I I I I I I I I I k i a J & I k I a I
ONPOST100-FORM
---------------------------------------------------------------------- --------------------------
I I ONSITE HYDROLOGY 100 YEAR STORM POST DEVELOPED CONDITION
---------------------- --
----------------------------------------------------------------------------------------------------------------------------
Project: ONPOST10O.rsb Page 1 Cal cul ated By:
study Date: 10/14/05 checked By:
100.0 Year storm I
******R A T 1 0 N A L H Y D R 0 L 0 G Y - S A N B E R N A D I N 0 C 0 Hydrology Manual Date Audust 1986 *******
Station/ Soil Type Devel.1 Area I FM J�m avg (SQ Q slopelSection' V L T TC I Hydraulics
Point No. A,B,C,D Type I(Acres) in/h in/hr in/hr ub) Total v/hz I FPS ft. min.1 min.1 or notes
--------- ---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- -----
--------- ---------------- ------- ---- ---- ---- ----- I ---------------
830 13 , 5 ----- JINITIAL SUBAREA
2.00 A-100% 4 /ac 4.1 3.7 0.59 0.59 11.4 ------ ----- ------- I ---- ---- -- - 13.5 ---------------
--------- ---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- I ---------------
--------- I ---------------- ------ ------- ---- -- 0.01
Effective area 4.10 (AC.) Total study area 4 10 (AC.) Peak flow rate 11.366 (CFS)
AP = 0.600 KS Curve (AMC ii)= 32.00
--------- ---------------- I ------ ------- ---- ------ ------ ----- ------ ----- ------- I ---- ---- ---- ----- ---------------
--------- ---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
--------- ---------------- ------ ------- ---- ---- --I ---- ---- ---- ----- ---------------
-------- ---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ---------------
---------------
--------- ---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ----
--------- I ---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ----
--------- ---------------- ------ ------- ---- ------ ------ ----- ------ ------- ---- ---- ---- ----- ---------------
------- ---- ------ ------ ---
--------- ---------------- ----- --- ---- ---- ---- ----- ---------------
--------- ---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
-------- ---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
--------- ---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
--------- ---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- I
--------- ---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
--------- --- 7 ------------ ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
-- ---- ---- ----- ---------------
--------- ---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
--------- ---------------- ------ ------- ---- I ------ ------ ----- ------ ----- ------- ---- ---- ---- I ----- I ---------------
--------- ---------------- ------ ------- ---- ------ ------ ----- ------ ----- ------- ---- ---- ---- ----- ---------------
---------------- ------ ------- ---- -------- ---- 7-1 ----- ------ ----- ------- ---- ---- ---- ----- ---------------
:::::::: -------- ------ ------- ---- ------ ---- ------ ----- ------- ---- ---- ---- I ----- I ---------------
---------------- ------ ------- ---- ------ ------ ------ ----- ------- ---- ---- I ---- ----- ---------------
version 7.1 Copyright (C) CIVILCADD/CIVILDESIGN, 1989 2005
----------------------------------------------------------------------------------------------------------------------------
Page 1
0,
ONPOST100-DET
dw San Bernardino County Rational Hydrology Program
(Hydrology Manual Date - August 1986)
CIVILCADD/CIVILDESIGN Engineering Software, (c) 1989-2005 version
7.1 Rational Hydrology study Date: 10/14/05
-------- ONSITE - HYDROLOGY 100 YEAR STORM POST DEVELOPED CONDITION
E=
am- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
on
go Program License serial Number 4064
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
********* Hydrology study control information
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 7 ---------------------
Rational hydrology study storm event year -is 100.0
10 Year storm I hour rainfall = 1.000(in.)
100 Year storm 1 hour rainfall = 1.500(in.)
Computed rainfall intensit�:
storm year = 10o.00 1 our rainfall 1.500 (in.)
SIO e used for rainfall intensity curve b = 0.6000
soi7 antecedent moisture condition (AMC) = 2
......................................................................
Process from Point/station 1.000 to Point/station 2.000
**** INITIAL AREA EVALUATION ****
RESIDENTIALO - dwl/acre)
Decimal fraction soil group A = 1.000
Decimal fraction soil group B = 0.000
Decimal fraction soil group C = 0.000
0.000
Decimal,fraction soil group D =
SCS curve number for soil(AMC 2) = 32-00 M)= 0.587(In/Hr)
Pervious ratio(Ap) = 0.6000 Max loss rate(F
dO
Initial subarea data:
initial area flow distance 830.000(Ft.)
Top (Of initial area) elevation = 46.000(Ft
(of initial area) elevation = 31-000�Ft-)
40
Bottom
Difference in elevation = 15.000(Ft.)
d0
slope = 0.01807 s(%)= 1.81
k(0.412)*[(lenqthA3)/(elevation change)]AO.2
TC =
Initial area time Ot concentration = 13.525 min.
3.667(In/Hr) for a 100.0 year storm
di
Rainfall intensity =
Effective runoff coefficient used for area (Q=KCIA) is c 0.756
subarea runoff = 11.366(CFS) 4.100(Ac.)
in
Total initial stream area =
fraction 0.600
di
Pervious area
Initial area Fm value 0. 5 87 (in/H r)
4.10 (Ac.)
End of computations, Total study Area
go
The following figures may
be used for a unit hydrograph study of the same area.
Page 1
40
do
ONPOST100-DET
Note: These figures do not consider reduced effective area
do effects caused by confluences in the rational equation.
Area averaged pervious area fraction(AP) 0.600
Area averaged SCS curve number = 32.0
di
4w
so
go
IN
di
Page 2
2-9
0
0
0
0
om
m
am
go
ONSITE AND OFFSITE
HYDROLOGY MAPS
m
W
0
0
0
ONSITE & OFFSITE HYDROLOGY MAP
PRE DEVELOPED CONDITION
MILLER AVENUE
------------ q ------------ - llx--
SCAL
....... . . .
P.P.
0
- - - - - - - - - - -- - - - - -.----W �E67W - - - - - -
x
ONSITE HYDROLOGY MAP,
POST DEVELOPED CONDITION
MILLER AVENUE
------ ------ --_q ------------ - ---------
SCALE 1`100 )
a
1 lie
a4vi
wa
R
ESIDE41AL
HOUQrlz
SUB EA 2
A 1 SUB PEA@
I., ................. ...... 1 8
A 1.89 AC
5
0 I= 00'
14
7.2'
TC 13.5 MIN
Q25 8.7 C FS 10.1 MIN
Q100 11.4 CF16 Q25 4.9 CFS
....... .. . ........... Qioo 6.4 CFS
V-1
. ...............
i
x
--------------------------------------
x
x
1349)
... ........ . . . (1345)
VACANTi LAND RESIDEN IAL
HOUS S
SUB ARE�o SU� A EA(�)
A = 2.2 7 AC A 30 AC
I = 6 47,1.
444 (1343)
1
--�--AH /= 11,
TC 21 MIN TC i-- 12.3 MIN
Q25 3,CFS 5 2 CFS
2 100= 3 9 CFS 6*. 8 C FS
-t4 (1346)
1345)
1 lie
a4vi
wa
R
ESIDE41AL
HOUQrlz
SUB EA 2
A 1 SUB PEA@
I., ................. ...... 1 8
A 1.89 AC
5
0 I= 00'
14
7.2'
TC 13.5 MIN
Q25 8.7 C FS 10.1 MIN
Q100 11.4 CF16 Q25 4.9 CFS
....... .. . ........... Qioo 6.4 CFS
V-1
. ...............
i
x
--------------------------------------
x
x
STATE OF CALIFORNIA
DEPARTMENT OF WATER RESOURCES
2552 /// NW 0.8 MI. TO CALIF. 30
459 10 VORE)
R. 5 W. 0 0 0
3
Well
3 1
0 a a
all me; 0 a a 'N
0 U on an 10,01
B M a a as Ills" a
r 121 /-4088 a
0 a a is
1396 0 a a
mWell a Van a
a in 0 0
SO U 0 0 a
a a a a Ed P1
n a. Ism
a
seems a a
a a as Ow a
a a a
to
at -
U ..a
a > an #00 RON$ a a 1AW
Rod
on
*""save"
u n p -.!P, r
ISM
an
eb
I w"Nows all a $,an a
a a 16 a
a
a V NUNN 0� a" "gone* wBM 1364
a No ago as .....u. it ..11
ago a a.., ..*
0 �A
cA e wow a 0
a
-Q 4.� "lose" a 'al @so 0
asevessom
IV)
UY p
NOR
a as gas a
a ark w.
SO
son Inj
an
94, V. vim
a vim an w
LLJ a 9 :0
SHOW" a 0 8 1,?4 0
so $&,, : P I a
Now a a — -------
a
Us was a a led a a a
man u's a gasses go polls
a a
so It A
a a a" go 0 a
a a a move seems
a
a a
dogwood
9 so 4%
1 same
ago a ago
as an wvsv�s a lole,
am so ad a a an k a 66 a
as a *some. US all- 0 on
us It
a gel
a * so ON a
a soussessom 0
a a a a -01 a a a- as a J6 as
n T -ANE a
RON
it
it
o seen
age* ON
its
Iff —IWARI
..... ......
%1A
01,
a" a
a
is a
11w -
4N
V
'a
k
er
so
so
so sea
Olus
0
a T
. . . . . . . . . . . .
"m
40
on
As
me
do
in
40
Im
is
0
on
FLOOD ZONE
MAP
-ft
Im
in
AN
0
m
k I I A & A & A & A Ik A III A I A 9 1 111 A & A & A III A & I It A & A 1k A &
APPROXIMATE SCALE IN FEET
500 0 500
C= C==
11702
'07"
34007'30"
ELEVATION REFERENCE MARKS
REFE:ENCE ELEVATGION
NATIONAL FLOOD INSURANCE PROGRA ld�
MA K FEET N VD) DESCRIPTION OF LOCATION
RM294' 1248. 43 Brass disk in south and of hoodwal I
f a r cu I ver t 36 feet north of I he
A I ch ison, Topeka a Santa Fe
FIRM
Ra I I road and 39 feet West a f
Juni.per Av.onue
FLOOD INSURANCE RATE MAP
RM295 1235. 10 Brass disk In nor thwost carrier of
Fontana Union Water Company Wall
MN 13ERNARDINO COWIT,
No. 121, 88 fool south of Atchison,
Topeka & Santa Fe Railroad and 86
CALIFORNIA AND
f so t was t of 01 sander Avenue
INCORPOR&TED AP.P.PiS
PANEL 8652 OF 9400
(SEE MAP INDEX FOR PANELS NOT PRINnO)
T1N
Tis
commulary NUMKR PAWL SWM
POWAK% CRY OF 0004 Im F
UN 0V*aRcW COVWrr�
UkVICOWOMYS) AN" 00M "a F
MAP NUMBER
06071CO652 F
EFFECTIVE DATE:
MARCH 18, 1996
rlldal
z
Emagency Management Agency
This is an ofillolal copy of a portion of the above referenced flood map. It
was extracted using F -MIT On -Lim 'This map do" not roloot *hang"
or which may how been made subsecluent to the date on the
:mendments
titl block. For the latest product Information about National Rood insurance
Program Ilood maps check the FEMA Flood Map etore at wvvw.mse.feme.gov
a
I I , i A &� A IL A & A i A & I I I k i a I I I I I k I & A i A i A &A k. 'A k I
Fb Edt Vlew FavodtaS Tods H*
sKk Uarch Favata
0
0
m
0
qm
40
0
I=
do
"m 10 AND 100 YEAR ISOHYETAL
Im MAPS
T4N R f
R U)Catw
R6W
T- R5W VAUXY
4 4
w.
RI RIE
R2E
t
L
WEST MIT
r
0 12
\4
T3N
IA
-t — I I — .... I— I
22
v
JL-
-4
At T. I
-J
T2N
L A�ItOWH' ,
IBER;�!K. ALDWIN L�
.9-9 (DIIN
%
L
A -t34'13T?
1.4 IVIL
14
1.5
S,
I j
L31
10 WAARLOAV,
il'i -a
' WP I-
-T 4-
4
DA14 7�-
I
TE
j�
-,T
!!;,-. T IN
SA
jj
R I A LTO—
TIS
A
+
f
0 T
7,
—J—
CHINO Y IIA
T2S
-4
a;
L RIE R 45
34-00,
RSIDE TI
R4W E
-T OL� JR I
R2 W
REDUCLD DRAWING
SCALE I"z 4 MILES
L.Ff,'FXnt
SAN BERNA, DINO COUNTY
FLOOD CONTROL DISTRICT
VALLEY AREA
ISDHYETALS
y10 10 YEAR I HOUR
VASM ON VAD.C� XPAA.,VLAS 2,1973
AM4tArM BY
-4-
T3S
R 5 W.'
DAW
4
A
SAN BERNARDINO COUNTY
R7W. RIG .........................
: HYDROLOGY MANUAL
REDUCLD DRAWING
SCALE I"z 4 MILES
L.Ff,'FXnt
SAN BERNA, DINO COUNTY
FLOOD CONTROL DISTRICT
VALLEY AREA
ISDHYETALS
y10 10 YEAR I HOUR
VASM ON VAD.C� XPAA.,VLAS 2,1973
AM4tArM BY
i5W
4,1
..4
R2W
lw
4
. .......
RIE
I
R2E
i - .
4 W I �,,J,
T4 N
R 5
REDuCED DRAWING
7
mzo
CONT^O,
J—
—T -1—N
SCALE 1 4 MILES
T3S
L5
Ij-
Tt
TIN
74
-j-
w
HYDROLOGY MANUAL
C, - a ISOLIKES PRECIPITATION (INCHES)
+
—07
JV
w ...............................
-0,
1.8
rk
5
u PL
Nk*Di'o L ---
T
I A
-F --A
--4--ltro"TA
-R LTD
L(
z
1p't
T7, s
310*
OLT N
-h
Tis
ol
.90
ONTA
K-i-vo
;p
REDLANDS
L. AN*
BE
7;e
7
-A 47-sa-�-
j—
f!
6
sm lumfx
YtwlcAAjrmA
c"I L
V7
.3—T? N
R
lva 4
CH
0
-7
er,
7
B-12 r—tk
vALLEY AREA
00MITA"
Ym-100 YEAR I HOUR
W--= 001 W -A NUO 3�- WS
AM -NOW=
MOL
12
FIGURE B-4
4
I
i - .
— — --+ -... -t 9-1— t -.-T
R 5
REDuCED DRAWING
mzo
CONT^O,
J—
—T -1—N
SCALE 1 4 MILES
T3S
L5
SAN BERNARDINO COUNTY
Tt
TIN
74
-j-
w
HYDROLOGY MANUAL
C, - a ISOLIKES PRECIPITATION (INCHES)
—07
JV
w ...............................
rk
5
u PL
Nk*Di'o L ---
I A
--4--ltro"TA
-R LTD
'7
T7, s
OLT N
Tis
ol
ONTA
K-i-vo
REDLANDS
—
7
-A 47-sa-�-
j—
6
sm lumfx
YtwlcAAjrmA
MVVT
R
CH
0
T2S
ERSIDE
0A,w
R3
R2w
B-12 r—tk
vALLEY AREA
00MITA"
Ym-100 YEAR I HOUR
W--= 001 W -A NUO 3�- WS
AM -NOW=
MOL
12
FIGURE B-4
+
R 5
REDuCED DRAWING
mzo
CONT^O,
J—
SCALE 1 4 MILES
T3S
L5
SAN BERNARDINO COUNTY
3, -130
A
74
-j-
w
HYDROLOGY MANUAL
C, - a ISOLIKES PRECIPITATION (INCHES)
8
w ...............................
B-12 r—tk
vALLEY AREA
00MITA"
Ym-100 YEAR I HOUR
W--= 001 W -A NUO 3�- WS
AM -NOW=
MOL
12
FIGURE B-4
on:
Al N 1
27
f5
I--- -1' /-6-77 r
.1 7tocl
Potce I Mop AID, 76 52. P.M. 78/5E
Par. Fbrcz?l AM'D No. 6926, AM. 70/50,51
Froci AL,
!7/27
Por Archibufd Troct No. 1993. M.. R�. 297p
Trdct No. 3653, MB. 47163 J
0)
07 33 -(al
city
Arec
—Tab LE-
2fvm AR
r -ook 1:90
_I
mill
2-5 A� Gu IQ�; C)Y">
o�
do
4wo 1 -%-- -
do Hyc4010�� Wxn""
qn w 11"4 top of
dW
i ct ieck
E-,,, JW, ctx? lk Ile �. �lj
Lk CV&
cky\4 �er AVt
dW
me OLnCA se C-� 0 vv
at Ca a y,, r (>,r f CA, k% VVN LA VV\
eC
Ck
do Cak Lk k6k 10 0
qu cW-Ay ox q�p_ CKA Vr\A . ker&
do Ck
Fo,,
do
of o Fck
w
do DOW, ODS 0
oovjf\
ook
AS
E>0�5C8 oyv
an m CA CA
koo C cjl ck 0 r) S
Cal�CkC-A�
C.AA�A&4-y
y
w
�CK
4e S'� C,
0,(W\V.\ i Ov
we,
7x -
do
3
2-4- wow c�-*
pw 0 S- S,
00
2/1
�ry
on y
40 4f
too
d1i
44
do
m