20131200 Ver 2_Area 1 - stormwater calcs_20140909

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TRYON EQUESTRIAN
8/18/2014
STORMWATER TREATMENT AND RETENTION AREA 1
Data
Total drainage area(Acres) 1 [.61 505,2961 20270
Impervious drainage (Acres) 5.561 242,194
First Flush depth (in) 1
RUNOFF VOLUME — SIMPLE METHOD
RV = 0.05 + 0.9 *IA
Where: Rv= Runoff coefficient [storm runoff (in /storm rainfall (in)), unitless
IA= Impervious fraction [impervious portion of drainage area (ac) /drainage area (ac), unitless
Rv = 0.48
WATER QUALITY VOLUME DETERMINATION
V = 3630 *Rc *Rv *A
Where: V = Minimum volume of pond from perm pool to temp pool up)
Rc = Design storm rainfall depth (in)
A = Watershed area (ac)
RELEASE VOLUME OVER 48 HOURS
Flow rate to allow release over 48 hours = Volume /release time
D = -4((4 *Q) /(TT *Cd *J(2 *g *H)))
Where: Q = Flowmte (cfs).
Cd = Coefficient of Discharge = 0.6
g = acceleration of gravity (ft/sec sqrd) = 32.2
H = Headwater (ft)
Use a 1.75" orifice

Rational Method
User Input Data
Calculated Value
Reference Data
Designed By: JCW Date: 8118/2014
Checked By: DWO Date:
Company: ODOM ENGINEERING
Project Name: Tryon Equestrian AREA 1
Project No.: 13017
Site Location (C- ityffown) tryon
CATCH BASIN # 1
The ratioa.•tl formula is
Q =CIA
where:
Q =peak rate of rumffin cubic &etper second (cfs)
C = rmoffcoefcient, an empirical coefficient representing the
relationship between rainfall rate and nmoffrate
I = average intensity of rainfall in inchevhmu. far a storm duration equal
to the time of coocentration, Tc
A = drainage area in acres
The general procedure for deternuuimg peak discharge using the rational
formula is presented below and illustrated in Sample problem 8.03x.
Step 1. Determine the drainage area in acres.
Total Drainage Area 0.51
Step 3. Determine the runoff coefficient. C, for the type of soilicover in the
drainage area (Table 8.03b).
If the laud use and soil =w is homogenous ova the drainage area. a C
value cam be determined directly from Table 8.03b. If there are multiple soil
<mxr <onditioms. a weighted average must be calculated, or the area maybe
subdivided.
Subarea A (acres) 0.51
Subarea A Runoff Coefficient 0.5 Runoff Coefficient
Subarea B (acres)
Subarea B Runoff Coefficient
Subarea C (acres)
Subarea C Runoff Coefficient
Subarea D (acres)
Subarea D Runoff Coefficient
Weighted Runoff Coefficient 0.5
Step 3.
Go to Intensity Worksheet
Step 4.
2 -year Rainfall Intensity, i (in/hr) 0
25 -year Rainfall Intensity, i (inlhr) 8.53
Step 5. Determine peal- discharge, Q (cubic feet per second), by multiplying
the previously determmed factmrs using the rational formula (Sample Problem
8.03a);
Q =CIA
Q2 FIoW (cfs) 0
Qls Flow (cfs) 2.2

ESTIMATING RUNOFF
Rational Method
User Input Data
Calculated Value
Reference Data
Designed By: JCW Date: 811812014
Checked By: DWO Date:
Company: ODOM ENGINEERING
Project Name: Tryon Equestrian AREA 1
Project No.: 13017
Site Location (CityrFown) tryon
CATCH BASIN # 2
The rational fomnda is:
Q = CIA
whom:
Q = peakmte of nmoffin cubic feet per second (cfs)
C = runoff ccefficient, an empirical coefficient representing the
relationdup betovm rainfall rate and runoff rate
I = axetage intensity of rainfall in mclumbour. for a storm duration equal
to the time of concentration, Tc
A = dm. ge area in acres
The general procedure for determining peak discharge ruing the rational
formula is presented below and illustrated in Sample problem 3.03 a.
Step 1. Determine the drainage area in acres. .
Total Drainage Area 0.19
Step?. Determine the nmoff coefficient, C, for the type of soillcover in the
drainage an (Table 3.03b).
If the laud use and .soil toter is homogenous over the drainage mea. a C
value ran be determined directly @am Table 8.03b. If there are multiple will
cover conditions, a weighted average most be calculated or the area may be
subdivided.
Subarea A (acres) 0.19
Subarea A Runoff Coefficient 0.5 Runoff Coefficient
Subarea B (acres)
Subarea B Runoff Coefficient
Subarea C (acres)
Subarea C Runoff Coefficient
Subarea D (acres)
Subarea D Runoff Coefficient
Weighted Runoff Coefficient 0.5
Step 3.
Go to Intensity Worksheet
Step 4.
2 -year Rainfall Intensity, i (iNhr) 0
25 -year Rainfall Intensity, 1 pnmr) 8.53
Step S. Determine peal- disrin,ge, Q (cubic feet per second), by multiplying
the previously determined factors using the rational formula (Sample problem
6.03a):
Q =CIA
Qa Flow (cfs) 0
Qto Flow (cfs) 0.8

Rational Method
Data
JCW Date: 8l1
DWO Date:
ODOM ENGINEERING
Tryon Equestrian AREA
The rational formula is:
Q = CIA
where:
Q = peak rate of runoff iambic Peer per second (cfs)
C = tumoffme&aem, an empirical coefficient representing the
relatumslvp between rainfall rate and rtmoffrate
I = merage intensity of rainfall in imchesihour. for a stout duration equal
to the time of concentration. Tr
A = drainage area in acres
The general procedure for determining peak discharge using the rational
fomma is presented below and illustrated in Sample problem 8.03a.
Step 1. Determine the drainage area in acres.
Drainage Area 0.32
Step!. Determine the runoff coe5rciem. C, for the type of soillcover in the
drainage area (Table 8.03b).
If the laud use and soil corer is homogenous oar the drainage area, a C
value can be determined directly from Table 8.03b. If there are multiple soil
cover conditions. a weighted average mast be calculated. or the area mac be
subdisided.
Subarea A (acres) 0.32
Subarea A Runoff Coefficient 0.5 Runoff ConlBclent
Subarea B (acres)
Subarea B Runoff Coefficient
Subarea C (acres)
Subarea C Runoff Coefficient
Subarea D (acres)
Subarea D Runoff Coefficient
Weiahted Runoff Coefficient 0.5
01
4.
r Rainfall Intensity, i (in/hr) 0
gar Rainfall Intensity, i (inthr) 8.53
S. Determine peal: discharge. Q (cubic feet per second), by multipMug
reviomly determined factors using the mtonal formula (Sample problem
Flow (cfs)
, Flow (cfs)
Q =CIA
0
1.4

l
Rational Method
User Input Data
Calculated Value
Reference Data
Designed By: JCW Date: 8/18/2014
Checked By: DWO Date:
Company: ODOM ENGINEERING
Project Name: Tryon Equestrian AREA 1
Project No.: 13017
Site Location (City/Town) tryon
CATCH BASIN # 4
The rational formula is:
Q = CIA
where:
Q = peak rare of numff in cubic feet per second (cfs)
C = nmoffcoefficiem. an empirical coeBaciem representing the
relationship between rainfall rate and nmoff raw
I = average intensity of rainivll in inclies"hout for a storm duration equal
to the time of cone uratim T.
A = drainage area in acres
The general procedure for determining peak discharge using the rational
formula is present ed below and Mustrated im Sample Problem 8.03a.
Step 1. Determine the drainage area in acres.
Total Drainage Area 0.36
Step'_. Determine the ntnoff coefftciem. C, for the type of soibcover in the
drainage area (Table 8.03b).
If the land use and sail cower is homogenous over the drainage area, a C
value can be determined directly from Table 8.03b. If there are multiple soil
cover conditions, a neighted average must be calculated. or the area may be
subdivided.
Subarea A (acres) 0.36
Subarea A Runoff Coefficient 0.5 Runoff Coefficient
Subarea B (acres)
Subarea B Runoff Coefficient
Subarea C (acres)
Subarea C Runoff Coefficient
Subarea D (acres)
Subarea D Runoff Coefficient
Weighted Runoff Coefficient 0.5
Step 3.
Go to Intensity Worksheet
Step 4.
2 -year Rainfall Intensity, i (tNhr) 0
25 -year Rainfall Intensity, t (infhr) 8.53
Step S. Determine peal: discharge. Q (cubic feet per second), by multiplying
the previously determined factors using the mutual fomnda (Sample problem
8.03a):
Q =CIA
Qa Flow (cfs) 0
Qw Flow (cfs) 1.5

ESTIMATING RUNOFF
Rational Method
User Input Data
Calculated Value
Reference Data
Designed By: JCW Date: 0/18/2014
Checked By: DWO Date:
Company: ODOM ENGINEERING
Project Name: Tryon Equestrian AREA 1
Project No.: 13017
Site Location (Cityrrown) tryon
CURB INLET # 1
The rational fomtula is;
Q = CIA
tvherc:
Q = peakrate of mmffiambic feet per second (cfs)
C = runoff coeStcimt, anempuical coeffuimt representing the
relationship between rainfall rate and runofrate
I = average intensity ofraudW in inchevhour. for a stow duration equal
to the time of concenratiom Tc
A = drainage area in acres
The general procedure for determining peak discharge using the rational
formula is presented belmv and illustrated in Sample problem 8.03a.
Step 1. Determine the drainage area in acres.
Total Drainage Area 0.09
Step 2. Determine the maoff caeil'rcie t. C, for the type of soil cover in the
drainage area (Table 8.03b).
If the land use and soil rater is homogenous Deer the drainage area, a C
tialue can be determined directly from Table 8.03b. If there are multiple sad
tour conditions, a weighted average must be calculated, or the area may be
subdivided
Subarea A (acres) 0.09
Subarea A Runoff Coefficient 0.5 Runoff Coetrclent
Subarea B (acres)
Subarea B Runoff Coefficient
Subarea C (acres)
Subarea C Runoff Coefficient
Subarea D (acres)
Subarea D Runoff Coefficient
Weighted Runoff Coefficient 0.5
Step 3.
Go to Intensity Worksheet
Step 4.
2 -year Rainfall Intensity, 1 (in/hr) 0
25 -year Rainfall Intensity, 1(in/hr) 8.53
Step S. Determine peak discharge, Q (cubic feet per second), by mudtiplving
the previously determined factors ruin the rational formula (Sample problem
8.03x);
Q =CIA
Qr Flow (cfs) 0
Qto Flow (cfs) 0.4

ESTIMATIN
G RUNOFF
Rational Method
User Input Data
Calculated Value
Reference Data
Designed By: JCW Date: 8/18/2014
Checked By: DWO Date:
Company: ODOM ENGINEERING
Project Name: Tryon Equestrian AREA 1
Project No.: 13017
Site Location (City/Town) tryon
CATCH BASIN # 5
The rational formula is:
Q =CIA
where:
Q = peak rate afrunoffin cubic feet per second (cfs)
C = runoff eoefficiem. an empirical coefficient representing the
rehntioaship benyeea rainfall rate and muff rate
I = average intensity of minSll m iuchesrhom, for a stain duration equal
to dte time of concentration, T.
A = drainage area in acres
The general procedure fa determinutg peak d�charge using the rational
formula is presented belrnv and illwanted in Sample problem 8.03a.
Step 1. Determine the drainage area in acres.
Total Drainage Area 0.95
Step 3. Determine the runoff coefficient. C. for the rape of soibbover in the
drainage area (Table 8.03b).
If the laud we and soil caw is homogenous over the drainage area, a C
vmhu eaa be determined directly firm Table 8.03b. If there are muhtiple sad
covw cordmous, a weighted average must be calculata or the area may be
subdivided.
Subarea A (acres) 0.85
Subarea A Runoff Coefficient 0.5 Runoff Coefficient
Subarea B (acres)
Subarea B Runoff Coefficient
Subarea C (acres)
Subarea C Runoff Coeficient
Subarea D (acres)
Subarea D Runoff Coefficient
Weighted Runoff Coefficient 0.5
Step 3.
Go to Intensity Worksheet
Step 4.
2 -year Rainfall Intensity, h (in/hr) 0
25 -year Rainfall Intensity, i (in/hr) 8.53
Step e. Determine peak diseb2ge. 0 (cubic feet per second), by multiplying
thepmriarsly determined factors wing the national fonmda (Sample problem
8.03x);
0 =CIA
Qa Flow (cfs) 0
Qto Flow (cfs) 4.1

ESTIMATING RUNOFF
Rational Method
User Input Data
Calculated Value
Reference Data
Designed By: JCW Date: 8118/2014
Checked By: DWO Date:
Company: ODOM ENGINEERING
Project Name: - Tryon Equestrian AREA 1
Project No.: 13017
Site Location (Cityfpown) tryon
CATCH BASIN # 6
Tire rational formula is:
Q =CIA
where:
O = peak rate of maoff in cubic feet per second (cfs)
C = rsmoffcoefficient, an empirical coefficient representing the
relationslup between rainfall rate and runoff rate
I = awxrage intensity of rainfall in inchevhom, for a stow duration equal
to the time of concentration, Tc
A = drainage area in acres
The general procedure for determining peak disclarge using the manual
fomrula is presented belmv and illustrated in Sample problem a.03a.
Step 1, Determine the drainage area in acres.
Total Drainage Area 0.92
Step 2. Determine the =off coefficient, C, for the type of soil/cover in the
drainage area (Table 3.03b).
if the land use, and soil corer is homogenous over the drainage area. a C
talue can be determined directly from Table 3.03b. If there are multiple soil
cmc condition, a weighted average must be calculated. or the area may be
.subdivided.
Subarea A (acres) 0.92
Subarea A Runoff Coefficient 0.5 Runoff Coef0cient
Subarea B (acres)
Subarea B Runoff Coefficient
Subarea C (acres)
Subarea C Runoff Coefficient
Subarea D (acres)
Subarea D Runoff Coefficient
Weighted Runoff Coefficient 0.5
Step 3.
Go to Intensity Worksheet
Step 4.
2 -year Rainfall Intensity, 1(in/hr) 0
25 -year Rainfall Intensity, t (inthr) 8.53
Step 5. Determine peak discharge. Q (cubic feet per second). by multiplying
the pmiously determined factors using the rational formula (Sample problem
3.03a);
Q =CIA
Q2 Flow (cfs) 0
Qtn Flow (cfs) 3.9

Rational Method
Designed By: JCW Date: 8/18/2014
Checked By: DWO Date:
Company: ODOM ENGINEERING
Project Name: Tryon Equestrian AREA 1
Protect No.: 13017
The rational formula is:
Q = CIA
when:
Q = peak rate ofmnoffin cubic feet per second (cfs)
C= maoffme8iciemt an empirical coefficient representing the
relatiombp between r%u&A rate and nmoff rate
I = average intensity of rain811 in iudtesihour, for a storm duration equal
to th<rime of concentration, Tc
A = drainage area to acres
The general procedure for detnmimag peak discimlle using the ratiomal
formula is presented below and illustrated in Sample problem 8.03x.
Step 1. Determine the drainage area iu acres.
Drainage Area 0.87
Step 3. Determine the runoff coeffrciew. C, for the type of soibcover in dte
drainage area (Table 8.03b).
If the land use and soil cmv is homogenous oser the drainage area. a C
value cau be de crat ed directly from table 8.03b. If there are multiple sail
cover conditions, a weighted average roust be calculated or the area may be
suldnided.
Subarea A (acres) 0.87
Subarea A Runoff Coefficient 0.5 Runoff Coefficient
Subarea B (acres)
Subarea B Runoff Coefficient
Subarea C (acres)
Subarea C Runoff Coefficient
Subarea D (acres)
Subarea D Runoff Coefficient
Weighted Runoff Coefficient 0.5
(Step 4.
2 -year Rainfall Intensity, i (In/hr) 0
25 -year Rainfall Intensity, t (inlhr) 8.53
Step 5. Determine peak discharge. Q (cubic feet per second), by muloplyiug
the preciously deknumed factors using the rational fomula (Samplepmblem
8.03x);
0 =CIA
IQ2 Flow (cfs) 0
Qta Flow (cfs) 3.7

ESTIMATING RUNOFF
Rational Method
User Input Data
Calculated Value
Reference Data
Designed By: JCW Date: 8/18/2014
Checked By: DWO Date:
Company: ODOM ENGINEERING
Project Name: Tryon Equestrian AREA 1
Project No.: 13017
Site Location (C' /Town) tryon
CATCH BASIN # 202
The rational fommla is:
Q =CIA
where:
Q = peak rate of runoff in cubic feet per second (cfs)
C = runoff coefficient, an empirical coef clew representing the
relationship between rainfall rote and runoff rate
I = av r ge intensity of rainfall in mchesihom fm a stone duration equal
to the tine o£coacenuatim Tc
A = drainage area in acres
The general procedure for determining peak discharge using the rational
formula is presemed helmv and illustrated in Sample problem 8.03x.
Step 1. Detemmine the draiwge area in acres.
Total Drainage Area 0.07
Step 2. Determine the runoff coerTiciem. C, for the t}pe of soil/cover in the
drainage area (Table 5.036).
If the land use and soil cover is homogenous over the drainage area. a C
value can, be determined &=ity from Table 8.03b. If there are multiple wil
cover conditions. a weighted average must be calculated or the area may be
subdivided.
Subarea A (acres) 0.07
Subarea A Runoff Coefficient 0.5 Runoff Caetnclent
Subarea B (acres)
Subarea B Runoff Coefficient
Subarea C (acres)
Subarea C Runoff Coefficient
Subarea D (acres)
Subarea D Runoff Coefficient
Weighted Runoff Coefficient 0.8
Step 3.
Go to Intensity Worksheet
Step 4.
2 -year Rainfall Intensity, i (inithr) 0
25 -year Rainfall Intensity, I (inlhr) 8.53
Step S. Determine peak discharge, Q (mdric feet per second), by multiplying
the previously determined factors using the rational formula (Sample problem
8.03x);
Q =CIA
Qa Flow (cfs) 0
Qto Flow (cfs) 0.3

Rational Method
JCW Date: 8/18/201
DWO Date:
ODOM ENGINEERING
Tryon Equestrian AREA 1
The national formula is:
Q = CIA
Where:
Q = peak ate of maoffin cubic feet per wand (c&)
C = mooff coefficient, an empirical coefficient representing the
relationship between rainfall ate and mmnoff au
I = average turensity of ain£all on mchesLom.. for a storm duration equal
to du time of concentration. T.
A= damage area in acres
The general procedure for demerminimg peak discharge using the m¢owl
formula is oresented below and i0usrated in Sample problem 8.03a.
Step 1. Determine the drainage area it acres.
Total Drainage Area 0.29
Step 3. Determine de mnoff coefficiem. C, for the type of wilrcasw in the
drainage area (Table 3.03b).
If the hand use and soil mw is homogenous over the drainage area. a C
cake can be determined duecdy from Table 8.03b. If there are multiple soil
cower conditions, a weighted mwage must be calculated or the area may be
subdivided.
Subarea A (acres) 0.29
Subarea A Runoff Coefficient 0.5 Runoff CoetBClent
Subarea B (acres)
Subarea B Runoff Coefficient
Subarea C (acres)
Subarea C Runoff Coefficient
Subarea D (acres)
Subarea D Runoff Coefficient
Weiqhted Runoff Coefficient 0.5
kjI
4.
it Rainfall Intensity, i (hn1hr) 0
gar Rainfall Intensity, h (in/hr) 8.53
Step S. Determine peak discharge. Q (cubic feer per sect, Ly multiplying
the pmaously determined factors using the rational formula (Sample problem
8.03a);
Q =CIA
Qr Flow (cfs) 0
Qts Flow (cfs) 1.2

Rational Method
Data
JCW Date: 8/1812014
DWO Date:
ODOM ENGINEERING
Tryon Equestrian AREA 1
201
The rational formula is:
0 = CIA
where'
0 = peals rate oftunoff in cubic feet per second (cfs)
C = runoffcoeffrciet, an empirical coefficient representing the
relationship between rainfall rate and nmoffrate
I = average intensity of raiacdl in inchevhour. for a star duration equal
to dw time of concentration. Tc
A = drauage area in acres
The general procedure for detemvaurg peak discharge wing the mtioml
formula is presented below and illustrated in Sample problem 8.03 a.
Step 1. Determine the drainage area in acres.
Total Drainage Area 0.16
Step 3. Determine the runt f ccef6ciem. C. for the type of soil cover in the
drainage area (Cable S.03b).
If the land we and soil cover is homogenous over the drainage area, a C
value can be derenmined directly from Table g.03b. If there are multiple sad
cmer conditions, a weighted average must be calculated. or the area may be
subdivided.
Subarea A (acres) 0.16
Subarea A Runoff Coefficient 0.5 Runoff Coetticient
Subarea B (acres)
Subarea B Runoff Coefficient
Subarea C (acres)
Subarea C Runoff Coefficient
Subarea D (acres)
Subarea D Runoff Coefficient
Weiahted Runoff Coefficient 0.5
1471
ainfall Intensity, i (In/hr) 0
Rainfall Intensity, i (in/hr) 8.53
Step S. Determine peak discharge. 0 (cubic feet per second), by multiplying
the previously determined factors using tie rational formula (SamplePsoblet
�HyFt
Flow (cfs) 0
Flow (cfs) 0.7

Rational Method
(Calculated Value I
uesfgnen i3 y: JCW Date: 8/18/2014
Checked By: DWO Date:
Company: ODOM ENGINEERING
Project Name: Tryon Equestrian AREA 1
Project No.: 13017
203
The rational formula is:
Q =CIA
where:
Q = peak rate of runoff in cubic far per second (cfs)
C = runoff inefficient, au empirical coefficient representing the
relatimsslvp between rainfall care and runoff rate
I = acxsage intensity of tail all in inclteshmn. for a stone duration equal
to the time of concenrcation, To
A = drainage wren in acres
The general procedure for detemuning peak discharge using the rational
formula is presented below and illustrated it Sample problem S.03a.
Step 1. Determine the drainage area in acres.
Drainage Area 0.15
Step 3. Determine the mnoff coefficient. C, for the type o'soitcover in the
drainage area (Table 9.03b).
If the laud use and soil coca is homogenous over the drainage area. a C
value can be determined directly from Table LOW If there are multiple sod
cover conditions. a weighted average smut be calculated or the area may be
subdi%ided.
Subarea A (acres) 0.15
Subarea A Runoff Coeficient 0.5 Runoff Coefficient
Subarea B (acres)
Subarea B Runoff Coefficient
Subarea C (acres)
Subarea C Runoff Coefficient
Subarea D (acres)
Subarea D Runoff Coefficient
Weighted Runoff Coefficient 0.5
3.
4.
.ainfall Intensity, i (inlhr) 0
Rainfall Intensity, i (In1hr) 8.53
S. Determine peak discharge. Q (cubic fat per second), by muluplyng
miously determined factors ruing the rational formula (Sample problem
Flow (cfs)
Flow (cfs)
Q =CIA
0
0.6

Rational Method
JCW
DWO
ODOM ENGINEERING
Tryon Equestrian AREA 1
(Site Location (City/Town) lryonl
(CATCH BASIN # 7A
The rational formula is:
Q = CIA
where:
Q =peak rate ofru off in cubic feet per second (cfs)
C = runoff coefficiemt. an empirical coefficient representing the
relationship between rainfall rate and nmoffate
I = average intensity of rainfall in iuchesahom. for a storm duration equal
to the time of concentration, Tc
A = drainage area in acres
The general procedure for determining peak discharge using the rational
formula is presented belmv and ilhusmited in Sample Problem 8.031.
Step 1. Determne the drainage area in acres.
Total Drainage Area 0.19
Step 2. Determine the mnoff coefficient. C. for the type of soilicover in the
drainage area (Table S.03b).
If the lard use and soil caw is homogemus over the drainage area a C
cahue can be determined directly from Table 8.03b. If there are multiple soil
cover conditions. a weuAiW average must be calculated. or die area may be
subdivided.
Subarea A (acres) 0.19
Subarea A Runoff Coefficient 0.5 Runoff coefficient
Subarea B (acres)
Subarea B Runoff Coefficient
Subarea C (acres)
Subarea C Runoff Coefficient
Subarea D (acres)
Subarea D Runoff Coefficient
Weichted Runoff Coefficient 0.5
3.
Rainfall Intensity, 1(inlhr) 0
r Rainfall Intensity, i (Inlhr) 8.53
Step S. Determine peak discharge, 0 (cubic feet per second), by mnlriplriug
the preiiouslydetermined factors using the mdonal formula (Sample Problem
Leers
Flow (cfs) 0
, Flow (cfs) 0.8

Rational Method
User Input Data
Calculated Value
Reference Data
Designed By: JCW Date: 8/18/2014
Checked By: DWO Date:
Company: ODOM ENGINEERING
Project Name: Tryon Equestrian AREA 1
Project No.: 13017
Site Location (CitylTown) tryon
CATCH BASIN # 204
The rational intends is:
Q = CIA
where:
Q = peak cute of mmffin cubic feet per second (cfs)
C = runoffcoeffcient. an empirical coefficient representing the
relationship between rainfall rate and rmoff rate
I = araage intensity of mmW in iuchesrhom, far a storm duration equal
to the time of concentration. Tc
A = drainage area in acres
The general procedure for determiuurg peak discsarge using the rational
formula is presented below and illustrated in Sample problem 8.03 a.
Step 1. Determine the drainage area in acres.
Total Drainage Area 0.47
Step 2. Determine the rmoffcuefBciem. C, for the type of soil corer in dre
drainage area (Table 8.03b).
If the land use and sod cover is homogenous o%w the drainage area. a C
wtue can be determined directly from Table 8.03b. If there are multiple sad
coyer condition. a weighted average most be calculated. or the area may be
subdivided.
Subarea A (acres) 0.47
Subarea A Runoff Coefficient 0.5 Runoff Coe0lclent
Subarea B (acres)
Subarea B Runoff Coefficient
Subarea C (acres)
Subarea C Runoff Coefficient
Subarea D (acres)
Subarea D Runoff Coefficient
Weighted Runoff Coefficient 0.5
Step 3.
Go to Intensity Worksheet
Step 4.
2 -year Rainfall Intensity, i (in /hr) 0
25 -year Rainfall Intensity, i (in/hr) 8.53
Step >. Determine peak discharge, Q (cubic feet per second), by multiplying
the preciously determined factors using the rational formula (Sample problem
8.03a):
Q =CIA
Qa Flow (cfs) 0
Qua Flow (cfs) 2.0

ESTIMATING RUNOFF
Rational Method
User Input Data
Calculated Value
Reference Data
Designed By: JCW Date: 8/18/2014
Checked By: DWO Date:
Company: ODOM ENGINEERING
Project Name: Tryon Equestrian AREA 1
Project No.: 13017
Site Location (Cityrrown) tryon
CATCH BASIN # 205
The rational formula is:
Q =CIA
where:
0 = peak rate of nmoff in cubic feet per second (cfs)
C = nraoffcoedicient, an empirical coefficient representing the
relationship between rainfall rate and runoff rate
I = average intensity of rain-111 in imcheshom, far a storm duration equal
to the time of conceatration, T.
A = dt, Ire area m acres
The general procedure for determining peak discharge using the national
Formula is presented below and illustrated in Sample problem 8.03a.
Step 1. Detemrine tlu drainage area iu acres.
Total Drainage Area 0.3
Step 2. Determine the nroff coeffcinnt. C, for the type of soilicover in the
drainage area (table 8.03b).
If the Lund use and soil corer is homogenous over the drainage area. a C
imbue can be determined duecily from Table 8.03b. If there are multiple soil
cover conditions. a weighted average musr be calculated, or the area may be
subdivided.
Subarea A (acres) 0.3
Subarea A Runoff Coefficient 0.5 Runoff Coefficient
Subarea B (acres)
Subarea B Runoff Coefficient
Subarea C (acres)
Subarea C Runoff Coefficient
Subarea D (acres)
Subarea D Runoff Coefficient
Weighted Runoff Coefficient 0.5
Step 3.
Go to Intensity Worksheet
Step 4.
2 -year Rainfall Intensity, i (inthr) 0
25 -year Rainfall Intensity, i (inthr) 5.53
Step 5. Determine peak discharge. Q (cubic feet per second), by multiplying
the previously determined factors using B:e rational formula (Sample problem
8.03x):
0 =CIA
Qa Flow (cfs) 0
Qto Flow (cfs) 1.3

Rational Method RUNOFF
User Input Data
Calculated Value
Reference Data
Designed By: JCW Date: 811 812 01 4
Checked By: DWO Date:
Company: ODOM ENGINEERING
Project Name: Tryon Equestrian AREA 1
Project No.: 13017
Site Location (City/Town) tryon
CATCH BASIN # 206
The rational formula is:
0 = CIA
where:
0 = peak rate of m coffin wbic feet per second (efs)
C = mnoff coefficient, an empirical coefftaem representing the
relationship between rauslall rate and naoffrate
I = avenaae intensity of rainfall in iuche hour- for a stoma duration equal
to the time of concentration. Tc
A = drainage =a in acres
The general procedure for detemaimag peak discharge using the national
formula is presented below and illustrated in Sample Problem 8.03a.
Step 1. Determine the drainage area in acres.
Total Drainage Area 0.47
Step 3. Determine the runoff coefficient C. for the t}pe of wit cower in die
drainage area (Table 8.03b).
If the land use and soil cover is homogenous over the drainage area. a C
value can be determined directly from Table 8.03b. If there are multiple soil
cover conditions. a weighted average must be calculated or the area may be
subdivided.
Subarea A(acres) 0.47
Subarea A Runoff Coefficient 0.5 Runoff Coefficient
Subarea B (acres)
Subarea B Runoff Coefficient
Subarea C (acres)
Subarea C Runoff Coefficient
Subarea D (acres)
Subarea D Runoff Coefficient
Weighted Runoff Coefficient 0.5
Step 3.
Go to Intensity Worksheet
Step 4.
2 -year Rainfall Intensity, i (in/hr) 0
25 -year Rainfall Intensity, i (inlhr) 8.53
Step 4. ine Detem peak discharge. Q (cubic feet per second), by mnitiplyiug
the previously detemuned factors using the rational fomvda (Sample Problem
8.03x);
Q =CIA
Q2 Flow (cfs) 0
Qto Flow (cfs) 2.0

Rational Method
User Input Data
Calculated Value
Reference Data
Designed By: JCW Date: 8/18/2014
Checked By: DWO Date:
Company: ODOM ENGINEERING
Project Name: Tryon Equestrian AREA 1
Project No.: 13017
Site Location (City/Town) tryon
CATCH BASIN # 207
Tlse rational formtila is:
Q = CIA
where:
Q = peak rate of runoff in cubic feet per second (cfs)
C = tunoff coefficient an empirical coetficimt representing the
relationship between rainfall rate and runoff rate
I = average iutensitp of rainEnll in iuchesthom, for a stone duration equal
to the time of concentration Tc
A = drainage area in acres
The general procedure for determuring peak discharge using the rational
formula is presented below and illustrated in Sample Problem 8.03 a.
Step 1. Determine the drainage area in acres.
Total Drainage Area 0.49
Step 1. Determine the runoff coefficient. C. for the type of soil cover in the
drainage area (Table 8.03b).
If the land use and soil carer is homtgennus over the drainage area. a C
aalw cau be determined directly Into Table 8.036. If there are multiple sad
cmTr conditions. a weighted average must be calculated. or the area may be
subdivided.
Subarea A (acres) 0.49
Subarea A Runoff Coefficient 0.5 Runoff CoefOclent
Subarea B (acres)
Subarea B Runoff Coefficient
Subarea C (acres)
Subarea C Runoff Coefficient
Subarea D (acres)
Subarea D Runoff Coefficient
Weighted Runoff Coefficient 0.5
Step 3.
Go to Intensity Worksheet
Step 4.
2 -year Rainfall Intensity, i (in /hr) 0
25 -year Rainfall Intensity, 1 (in/hr) 8.53
Step S. Determine peak discharge, Q (cubic feet per second), by multiplying
the previously determined factors using the mtiowl formula (Sample Problem
8.03a):
Q =CIA
Qa Flow (cfs) 0
Oto Flow (cfs) 2.1

Rational Method
IMF
811
DWO Date:
ODOM ENGINEERING
Tryon Equestrian AREA 1
13017
The rational formula is:
Q = CIA
sshm:
Q = peak rate of runoff in cubic feet per second (cfs)
C = runoffcoefficient, an empirical coefficient representing the
relationship behveen rainfall rate and nmoffraw
I = average intensity of rainfall in indL ,hour. for a stow duration equal
to the time of coucentratiou To
A = drainage area in acres
The general procedure for detemuniag peak discharge using the rational
formula is presented below and i0ustrated in Sample problem 8.03a.
Step 1. Determine the drainage area to acres.
Drainage Area 0.3
Step 2. Determine the muoff coefficient. C, for the type of soihcover in the
drainage area (Table S.03b).
If the land use and soil cover is homogenous over the drainage area, a C
talue caube determined directly from Table 8.03b. L there are multiple sod
cover condition, a weighted avrrage must be calculated, or the area may be
subdivided.
Subarea A (acres) 0.3
Subarea A Runoff Coefficient 0.5 Runoff Coefflclent
Subarea B (acres)
Subarea B Runoff Coefficient
Subarea C (acres)
Subarea C Runoff Coefficient
Subarea D (acres)
Subarea D Runoff Coefficient
Weighted Runoff Coefficient 0.5
3.
Rainfall Intensity, i (inthr) 0
r Rainfall Intensity, t (in/hr) 8.53
Step 5. Determine peak discharge. Q (cubic feet per second). by multiplying
the prniously determined factors using the rationalfarmula (Sample problem
Q =CIA
Flow (cfs) 0
, Flow (cfs) 1.3

ESTIMATING RUNOFF
Rational Method
User Input Data
Calculated Value
Reference Data
Designed By: JCW Date: 8/1812014
Checked By: DWO Date:
Company: ODOM ENGINEERING
Project Name: Tryon Equestrian AREA 1
Project No.: 13017
Site Location (Cityfrown) try on
CATCH BASIN # RING CI3#
The rational formula is:
Q = CIA
Where:
Q = peak rate of tomffin cubic fat per second (cfs)
C = rmoffcoeffcient. an empirical coefficient representing the
relatiottibip between miuW rate and mnoff rate
I = average intensity of minfatl iu incl es hmr. fm a stone dmation equal
to the time of concentration. Tc
A = drainage area in acres
The general pmcedme for deteramang peak discharge using the rational
formula is presented below and illustrated in Sample problem 8.03a.
Step 1. Detemtinu the drainage area in acres.
Total Drainage Area 0.53
Step 2. Determine the mem-Tcoefficient, C, for the type of wilrcovror in the
drainage area (Table 8.03b).
If the Lord use and soil cover is homogenous over the drainage area, a C
value can be determined duecay from Table 8.03b. If there are multiple sail
cover conditions, a weighted average must be calculated, or the area may be
subdivided.
Subarea A (acres) 0.53
Subarea A Runoff Coefficient 0.5 Runoff CoefOclent
Subarea B (acres)
Subarea B Runoff Coefficient
Subarea C (acres)
Subarea C Runoff Coefficient
Subarea D (acres)
Subarea D Runoff Coefficient
Weighted Runoff Coefficient 0.5
Step 3.
Go to Intensity Worksheet
Step 4.
2 -year Rainfall Intensity, i (inthr) 0
25 -year Rainfall Intensity, i (inlhr) 8.53
Step 5, Determine peak discharge. Q (cubic feet per second), by multiplying
the previously determined factors using the rational fomsula (Sample problem
8.03x):
Q =CIA
Qa Flow (cfs) 0
Qto Flow (cfs) 2.3

ESTIMATING RUNOFF
Rational Method
User Input Data
Calculated Value
Reference Data
Designed By: JCW Date: 811812014
Checked By: DWO Date:
Company: ODOM ENGINEERING
Project Name: Tryon Equestrian AREA 1
Project No.: 13017
Site Location (CityrTown) tryon
CATCH BASIN # RING CB#4
The rational formula is:
0 = CIA
where:
0 = peakrate of runoff in cubic feu per second (cfs)
C = amoffcoetHaent, an empirical coefficient representing the
relationship betnzen rainfall rare and nmoff rate
I = average intensity of rain£dl in incliesohour. for a storm duration equal
to the time of concentration. Tc
A = drainage area in acres
The general procedure £or detemdning peak discharge rasing the rational
formula is presented below and i0usrated in Sample problem 8.03a.
Step 1. Determine the drainage area in acres.
Total Drainage Area 0.39
Step 2. Determine the runoff coefficient. C. for the type of mibcover in the
drainage area (Table 8.03b).
If the laud use and sod env is homogenous over the drainage area. a C
value can be determined directly from Table 8.03b. If tbae are multiple soil
cove conditions, a weighted average must be calculated, or the area may be
subdivided.
Subarea A (acres) 0.39
Subarea A Runoff Coefficient 0.5 Runoff Coef0cienl
Subarea B (acres)
Subarea B Runoff Coefficient
Subarea C (acres)
Subarea C Runoff Coefficient
Subarea D (acres)
Subarea D Runoff Coefficient
Weighted Runoff Coefficient 0.5
Step 3.
Go to Intensity Worksheet
Step 4.
2 -year Rainfall Intensity, i (inthr) 0
25 -year Rainfall Intensity, i (in/hr) 8.53
Step 5. Determine peak discharge. Q (cubic feet per second), by multiplying
the previously dettstmued factors using the rational formula (Sample problem
8.03x):
Q =CIA
Qt Flow (cfs) 0
Qta Flow (cfs) 1.7

a
Rational Method
User Input Data
Calculated Value
Reference Data
Designed By: JCW Date: 81812014
Checked By: DWO Date:
Company: ODOM ENGINEERING
Project Name: Tryon Equestrian AREA 1
Project No.: 13017
Site Location (City/Town) tryon
CATCH BASIN # 7B
The rational formula is
Q = CIA
where:
Q =peak rate ofrunoff in cubic feet per second (cfs)
C = nmoffcoeffrcient, an empirical coefficient representing the
relationship between raia£ib rate and runoff rate
I = average intensity of rainfall is iacheshom. for a storm duration equal
to the time of concentration, Tc
A= drainage area in acres
The general procedure for determining peak discharge using the rational
formula is presented below and i0ustrated in Sample problem 8.03a.
Step 1. Determine the drainage area in acres.
Total Drainage Area 0.14
Step 3. Determine the mmoff coeffrcieur. C, for the type of soilcover in the
drainage area (Table 8.03b).
If the )and use and sod wrsr is homogenous ovror the drainage area, a C
slue can be determined directly from Table 8.03b. If there are multiple soil
cover conditions, a weighted average most be calculated. or the area may be
subdivided.
Subarea A (acres) 0.14
Subarea A Runoff Coefficient 0.5 Runoff Coefflclent
Subarea B (acres)
Subarea B Runoff Coefficient
Subarea C (acres)
Subarea C Runoff Coefficient
Subarea D (acres)
Subarea D Runoff Coefficient
Weighted Runoff Coefficient 0.5
Step 3.
Go to Intensity Worksheet
Step 4.
2 -year Rainfall Intensity, i (in/hr) 0
25 -year Rainfall Intensity, 1 (inthr) 8.53
Step 5. Determine peak discharge. Q (cubic feet per second), by multiplvimg
the previously determined factors using the mtionalformula (Sample Problem
8.033):
Q =CIA
Qr Flow (cfs) 0
Qro Flow (cfs) 0.6

Rational Method •
User Input Data
Calculated Value
Reference Data
Designed By: JCW Date: 8/1812014
Checked By: DWO Date:
Company: ODOM ENGINEERING
Project Name: Tryon Equestrian AREA 1
Project No.: 13017
Site Location (CitylTown) tryon
CATCH BASIN # RING CB#1
The rational formula is:
Q = CIA
where:
Q = peak rote of runoff in cubic feet per second (cfs)
C = nmoff coefficient, an empirical coefficient cepresenring the
relationship between rainfall rate and runoff rate
I = a%x ee inrmsity of rairaU iu iuche limr. fora storm duration equal
to die time of concentration. Tc
A = drainage area in acres
The general procedure for determining peak discharge using the rational
formula is presented Wmv and illustrated in Sample Problem 3.03a.
Step 1. Determne the drainage =a in acres.
Total Drainage Area 0.31
Step 2. Determine the nmoff coefficient. C, for the rape of soiVcover in the
drainage area (Table 3.03b).
If the laud use and soil cots is homogenous over the drainage area. a C
glue can be determined directly from Table 8.03b. If there are multiple will
co%w conditions. a weighted average must be calculated, or the area may be
subdivided.
Subarea A (acres) 0.31
Subarea A Runoff Coefficient 0.5 Runoff Coefficient
Subarea B (acres)
Subarea B Runoff Coefficient
Subarea C (acres)
Subarea C Runoff Coefficient
Subarea D (acres)
Subarea D Runoff Coefficient
Weighted Runoff Coefficient 0.5
Step 3.
Go to Intensity worksheet
Step 4.
2 -year Rainfall Intensity, i (In/hr) 0
25 -year Rainfall Intensity, i (int hr) 8.53
Step 5. Determine peak discharge. 0 (cubic feet per second), by multiplying
the pmiously determined factors using the rational formula (Sampleproblera
3.03a);
0 =CIA
Qr Flow (cfs) 0
Qla Flow (cfs) 1.3

Rational Method
Value
d By: DWO Date:
ly: ODOM ENGINEERING
Name: Tryon Equestrian AREA 1
No.: 13017
CB#2
The rational formula is-
Q = CIA
Where:
Q = peak rate of naneffin cubic &et per second (cfs)
C = rtmoffcoeffuimt, an empirical coefficient representing the
rehationsbip bemmen madiall rate and nmoff rate
I = avxrage intensity, of rnincdl in mchesihour. for a stoma duration equal
to the more of concmtradou Tc
A = drainage arm in acres
The general procedure for determining peak discharge using the national
faamla is presented below and illurnatcd in Sample problem 8.03x.
Step 1. Determine the drainage area in acres.
Drainage Area 0.25
Step 2. Determine tire muoffcoefficient. C. for the type of soihcover in the
drainage arm (Table 3.03b).
If the land use and ;oil cover is homogenous over the drainage men. a C
%xt= can be determined directly fimm Table 8.036. If there are multiple sail
cover conditions. a Weighted average must be calculated or the area may be
subdivided.
Subarea A (acres) 0.25
Subarea A Runoff Coefficient 0.5 Runoff Coefficient
Subarea B (acres)
Subarea B Runoff Coefficient
Subarea C (acres)
Subarea C Runoff Coefficient
Subarea D (acres)
Subarea D Runoff Coefficient
Weighted Runoff Coefficient 0.5
3.
4.
r Rainfall Intensity, i (in/hr) 0
:ar Rainfall Intensity, 1 (in/hr) 8.53
Step S. Deu mm ac peak discharge. Q (cubic feet per second). by multiplying
the previouslydetermianed factors wing the rational formula (Sample problem
8.03a):
Q =CIA
Qa Flow (cfs) 0
Qto Flow (cfs) 11

C
ESTIMATING RUNOFF
Rational Method
User Input Data
Calculated Value
Reference Data
Designed By: JCW Date: 811812014
Checked By: DWO Date:
Company: ODOM ENGINEERING
Project Name: Tryon Equestrian AREA 1
Project No.: 13017
Site Location (City/Town) tryon
CATCH BASIN # 7C
The rational famsula is:
Q = CIA
whem
Q = peak ate of nmoffin cubic feet per second (cfs)
C = rauoffcoefficient, an empirical coelactent representing the
relationship between rainfall rate mad nmoffrate
I = avenge intensity of rainfall in inchmhour. for a stonu duration equal
to the time of concentration, Tc
A= daiaige area in acres
The general procedure fm deterauniug peak discharge using the rational
formula is presented below and illustrated in Saurple problem 8.03a.
Step 1. Determine the drainage area in acres.
Total Drainage Area 0.15
Step 1. Determine the nnmff coefficient. C. for dte qTe of w1covet in the
drainage area (Table 9.03b).
If the had use and soil cover is hoomgenous over the drainage area. a C
value can be determined directly from Table 9.036. If there me multiple sod
cover conditions. a weighted average must be calculated or the area nuy be
subdivided.
Subarea A (acres) 0.15
Subarea A Runoff Coefficient 0.5 Runoff Coetncient
Subarea B (acres)
Subarea B Runoff Coefficient
Subarea C (acres)
Subarea C Runoff Coefficient
Subarea D (acres)
Subarea D Runoff Coefficient
Weighted Runoff Coefficient 0.5
Step 3.
Go to Intensity Worksheet
Step 4.
2 -year Rainfall Intensity, i (In/hr) 0
25 -year Rainfall Intensity, i (inlhr) 8.53
Step S. Detemune peal- disclurge. Q (cubic feet pa second), by multiplying
the previously detemuned factors using the rational formula (Sampleproblem
8.03x);
Q =CIA
Qa Flow (cfs) 0
410 Flow (cfs) 0.6

1
Rational Method
User Input Data
Calculated Value
Reference Data
Designed By: JCW Date: 8/18/2014
Checked By: DWO Date:
Company: ODOM ENGINEERING
Project Name: Tryon Equestrian AREA 1
Project No.: 13017
Site Location (Cityffown) tryon
CATCH BASIN # 7D
The rmonal formula is:
Q = CIA
Where-
0 = peak rate of runoff in cubic feet per second (cfs)
C = =off coefficient, an empirical coefficient repro rearing the
relatiomsbip between rainfall rate and runoff rate
I = awerage intensity of rainfall in inclsse:oru. for a atoms d..ration egcal
to the time mf concentration, Tn
A = drainage area in acres
The general procedure for determining peak discharge using the rational
formula is presented below and illustrated in Sample problem 8.03a.
Step 1. Determine the drainage area in acres.
Total Drainage Area 0.42
Step 2. Determine the runoff coefficient. C, for the type of soilicowr in the
drainage area (Table 8.03b).
If the laud use and soil rover is homogenous ower the drainage area. a C
ralue can be determined directly from Table 9.036. If there are multiple soil
cones conditions, a weighted avera ge most be calculated or the area may be
subdivided.
Subarea A (acres) 0.42
Subarea A Runoff Coefficient 0.5 Runoff Coett cient
Subarea B (acres)
Subarea B Runoff Coefficient
Subarea C (acres)
Subarea C Runoff Coefficient
Subarea D (acres)
Subarea D Runoff Coefficient
Weighted Runoff Coefficient 0.5
Step 3.
Go to Intensity Worksheet
Step 4.
2 -year Rainfall Intensity, i (in/hr) 0
25 -year Rainfall Intensity, i (In/hr) 8.53
Step S. Determine peak discharge. Q (cubic feet per second), by multiplying
the po niously determined factors using the muonal formula (Sample problem
9.031):
Q =CIA
Qr Flow (cfs) 0
Qra Flow (cfs) 1.8

71�nput� •
Calculated Value
Reference Data
Designed ned By: JCW Date: 8/1812014
Checked By: DWO Date:
Company: ODOM ENGINEERING
Project Name: Tryon Equestrian AREA 1
Project No.: 13017
Site Location (Cityfrown) tryon
CATCH BASIN # 7E
The rational formula is:
Q = CIA
where:
Q = peak rate of nmoff in cubic fat per wood(cfs)
C = maoffcoefcient. an empirical coeffcientrepresenriog the
relationship between rainfall rate and nmoff rate
I = meragt intensip of rainfall iu iuchesduom, for a storm duration eQUal
to the time of conanttation. To
A = drainage area in acres
The general procedure for determining peak &wItarge using the rational
formula is presented below and illustrated in Sample problem 8.03a.
Step 1. Detenuine the drainage area in acres.
Total Drainage Area 0.43
Step 2. Determine the runoff coefficient. C, for the type of soil,cover in the
drainage area (Table 8.03b).
If the laud use and soil cover is homogenous over the drainage area, a C
vxtue can be determined directly from Table 8.03b. If there are multiple sod
cover conditions, a uxighted average must be calculated or the area may be
subdivided.
Subarea A (acres) 0.43
Subarea A Runoff Coefficient 0.5 Runoff Coefficient
Subarea B (acres)
Subarea B Runoff Coefficient
Subarea C (acres)
Subarea C Runoff Coefficient
Subarea D (acres)
Subarea D Runoff Coefficient
Weighted Runoff Coefficient 0.5
Step 3.
Go to Intensity Worksheet
Step 4.
2 -year Rainfall Intensity, i (inlhr) 0
25 -year Rainfall Intensity, i (In/hr) 8.53
Step 5. Determine peak discharge. Q (cubic feet per second), by multiphW
the previously determined factors using the rational formula (Sam le problem
8.033):
Q =CIA
Qz FloW (cfs) 0
Qta Flow Ids) 1.8

ESTIMATING RUNOFF
Rational Method
User Input Data
Calculated Value
Reference Data
Designed By: JCW Date: 8/1812014
Checked By: DWO Date:
Company: ODOM ENGINEERING
Project Name: Tryon Equestrian AREA 1
Project NO.: 13017
Site Location (Cityfrown) tryon
JUNCTION BOX # 4
The rational formula is:
Q = CIA
where:
0 = peak rate of runoff in cubic feet per second (cfs)
C = nnnoffcoefftcient, an =pineal coefficient representing the
relationship benveer. rainfall rate and nmoff rate
I = to erane intensity of rainfall in hnches�hour, for a storm duration equal
to the time of concentration, Tn
A = drainage area it acres
The general procedure for determ mag peak discharge using the rational
formula is presented below and illustrated in Sample Problem! 8.033.
Step 1. Determine the drainage area in aces.
Total Drainage Area 0.49
Step 2. Determine the runoff coe9iciem. C, for the type of soilicover in the
dramge area (Table 8.03b).
If the Land use and soil rota is homogenam over the drainage area, a C
%nine can be determined directly from Table 8.03b. If there are multiple soil
%tier conditions. a %veiglued average mamt be calculated, or the area my be
subdivided.
Subarea A (acres) 0.49
Subarea A Runoff Coefficient 0.5 Runoff Coerncient
Subarea B (acres)
Subarea B Runoff Coefficient
Subarea C (acres)
Subarea C Runoff Coefficient
Subarea D (acres)
Subarea D Runoff Coefficient
Weighted Runoff Coefficient 0.5
Step 3.
Go to Intensity Worksheet
Step 4.
2 -year Rainfall Intensity, i (inlhr) 0
25 -year Rainfall Intensity, 1(inRlr) 8.53
Step S. Detemtiue peal- discharge, 0 (cubic feet per second). by multiplying
de previously determined factors using the rational formula (Sample problem
8.033);
Q =CIA
Qa Flow (cfs) 0
Qrt Flow (cfs) 2.1

Rational Method
User Input Data
Calculated Value
Reference Data
Designed By: JCW Date: 8/18/2014
Checked By: DWO Date:
Company: ODOM ENGINEERING
Project Name: Tryon Equestrian AREA 1
Project No.: 13017
Site Location (City/Town) tryon
JUNCTION BOX # 5
The maorul famda is:
Q =CIA
Where :
0 = peak rate ofmnoffin cubic feet per wand (cfs)
C = mnoff coet5cism. an empirical coefficient repmeatin¢ the
relationship between miufdl rate and runoff rate
I = average intensity ofrainUl in iuchestbour. far a stem data equal
to the time of concentration. Tc
A = drainage area is acres
The general procedure for determining peak discharge using the national
formula is presented below, and illustrated in Sample problem 8.03 a.
Step 1. Detemame the drainage area in acres.
Total Drainage Area 0.23
Step 3. Determine the runoff coefficient, C. for the type of soil,cover in tire
drainage am (Table 8.03b).
If the Land use and soil omw is homogenous over the drainage area. a C
value can be determined directly 6-am Table 8.03b. If there are multiple sad
cover coaditiau. a weighted average must be calculated or the area may be
stdsdisided.
Subarea A(acres) 0.23
Subarea A Runoff Coefficient 0.5 Runoff Coeff dent
Subarea B (acres)
Subarea B Runoff Coefficient
Subarea C (acres)
Subarea C Runoff Coefficient
Subarea D (acres)
Subarea D Runoff Coefficient
Weighted Runoff Coefficient 0.5
Step 3.
Go to Intensity Worksheet
Step 4.
2 -year Rainfall Intensity, i(inlhr) 0
25 -year Rainfall Intensity, i (tn/hr) 8.53
Step S. Determine peak dischatge. 0 (cubic feet per second), by mdtiplywg
the preciously detentured factors using the rationalfamuda (Sample problem
8.03x):
Q =CIA
Qa Flow (cfs) 0
Qta Flow (cfs) 1.0

C
Rational Method
User Input Data
Calculated Value
Reference Data
Designed By: JCW Date: 8/1812014
Checked By: DWO Date:
Company: ODOM ENGINEERING
Project Name: Tryon Equestrian AREA 1
Project No.: 13017
Site Location (City/Town) tryon
CATCH BASIN # CABIN CB#6
The rational formula is:
Q = CIA
where:
Q = peak rate of nmoffin cubic feet per second (cfs)
C = nmoffcoefficient, an empirical coefficient representing the
relationship between rainfall rate and .runoff rate
I = average intensity of rainfall in iuches,hour. for a strum druation equal
to the time of concentration. T.
A = drainage area in acres
The general procedure for determining peak discharge using the mrt ®al
fomda is presented below and illustrated in Sample problem 8.03a.
Step 1. Determine the drainage area in acres.
Total Drainage Area 0.25
Step 2. Determine the runoff coefficient, G for the type of soibcocer in the
drainage area (Table 8.03b).
If the Land use and soil cosec is homogenous mw the drainage area, a C
tnluc can be determined directly firm Table 8.036. If there are multiple soil
cover conditions, a weighted average most be calculated. or the area may be
subdivided.
Subarea A (acres) 0.25
Subarea A Runoff Coefficient 0.5 Runoff coefficient
Subarea B (acres)
Subarea B Runoff Coefficient
Subarea C (acres)
Subarea C Runoff Coefficient
Subarea D (acres)
Subarea D Runoff Coefficient
Weighted Runoff Coefficient 0.5
Step 3.
Go to Intensity Worksheet
Step 4.
2 -year Rainfall Intensity, i (in/hr) 0
25 -year Rainfall Intensity, i (in/hr) 8.53
Step S. Determine peak discharge. Q (cubic feet per second). by multiplying
the previmssly determined factors using the rational formula (Sample Problem
8.03a):
Q =CIA
Qa Flow (cfs) 0
Qto Flow (cfs) 1.1

Channel Report
Hydraflow Express Extension for AutoCAD® Civil 3D® 2013 by Autodesk, Inc.
CB #1 TO CB #2
Circular
Diameter (ft) = 1.25
Invert Elev (ft) = 893.50
Slope ( %) = 0.50
N -Value = 0.013
Calculations
Compute by: Known Q
Known Q (cfs) = 2.20
Elev (ft)
895.00
894.00
893.50
893.00
Tuesday, Aug 19 2014
Highlighted
Depth (ft)
= 0.61
Q (cfs)
= 2.200
Area (sqft)
= 0.60
Velocity (ft/s)
= 3.68
Wetted Perim (ft)
= 1.94
Crit Depth, Yc (ft)
= 0.60
Top Width (ft)
= 1.25
EGL (ft)
= 0.82
Section
0 1 2 3
Reach (ft)

Channel Report
Hydraflow Express Extension for AutoCAD® Civil 3D@2013 by Autodesk, Inc.
C B #2 TO C B #3
Circular
Diameter (ft) = 1.25
Invert Elev (ft)
= 893.00
Slope ( %)
= 0.50
N -Value
= 0.013
Calculations
= 3.95
Compute by:
Known Q
Known Q (cfs)
= 3.00
Elev (ft)
895.00
894.50
894.00
893.50
893.00
692.50
Tuesday, Aug 19 2014
Highlighted
Depth (ft)
= 0.74
Q (cfs)
= 3.000
Area (sqft)
= 0.76
Velocity (ft/s)
= 3.95
Wetted Perim (ft)
= 2.20
Crit Depth, Yc (ft)
= 0.70
Top Width (ft)
= 1.23
EGL (ft)
= 0.98
Section
0 1 2 3
Reach (ft)

Channel Report
Hydraflow Express Extension for AutoCAD® Civil 3D® 2013 by Autodesk, Inc.
CB #3 TO CB #4
Circular
Diameter (ft) = 1.25
Invert Elev (ft) = 892.00
Slope ( %) = 0.50
N -Value = 0.013
Calculations
Compute by: Known Q
Known Q (cfs) = 4.40
Elev (ft)
894.00
1.16MIIlI
E:i'XX�I�1
E:IOM111
*10411B1
891.50
Tuesday, Aug 19 2014
Highlighted
Depth (ft)
= 0.99
Q (cfs)
= 4.400
Area (sqft)
= 1.04
Velocity (ft/s)
= 4.22
Wetted Perim (ft)
= 2.74
Crit Depth, Yc (ft)
= 0.85
Top Width (ft)
= 1.01
EGL (ft)
= 1.27
Section
0 1 2 3
Reach (ft)

Channel Report
Hydraflow Express Extension for AutoCAD® Civil 3D® 2013 by Autodesk, Inc.
CB #4 TO CI #1
Q (cfs)
Circular
Area (sqft)
Diameter (ft)
= 2.00
Invert Elev (ft)
= 890.60
Slope ( %)
= 0.10
N -Value
= 0.013
Calculations
EGL (ft)
Compute by:
Known Q
Known Q (cfs)
= 5.90
Elev (ft) Section
893.00
892.50
892.00
891.50
891.00
890.50
Tuesday, Aug 19 2014
Highlighted
Depth (ft)
= 1.39
Q (cfs)
= 5.900
Area (sqft)
= 2.34
Velocity (ft/s)
= 2.53
Wetted Perim (ft)
= 3.95
Crit Depth, Yc (ft)
= 0.86
Top Width (ft)
= 1.84
EGL (ft)
= 1.49
Depth (ft)
2.40
1.90
I IM, to]
M1
[I1<[1]
-0.10
1 2 3
Reach (ft)
4

Channel Report
Hydraflow Express Extension for AutoCAD® Civil 3D@2013 by Aulodesk, Inc.
CI #1 TO CB #5
Q (cfs)
Circular
Area (sqft)
Diameter (ft)
= 2.00
Invert Elev (ft)
= 889.10
Slope ( %)
= 0.50
N -Value
= 0.013
Calculations
EGL (ft)
Compute by:
Known Q
Known Q (cfs)
= 6.30
Elev (ft)
892.00
i
891.50
M4191I111
890.50
890.00
889.50
889.00
::: I '
Section
Tuesday, Aug 19 2014
Highlighted
Depth (ft)
= 0.87
Q (cfs)
= 6.300
Area (sqft)
= 1.32
Velocity (ft/s)
= 4.77
Wetted Perim (ft)
= 2.89
Crit Depth, Yc (ft)
= 0.89
Top Width (ft)
= 1.98
EGL (ft)
= 1.22
1
2
Reach (ft)
M
Depth (ft)
2.90
2.40
1.90
iM, to]
0.90
0.40
-0.10
-0.60
4

Channel Report
Hydraflow Express Extension for AutoCAD® Civil 3D@2013 by Autodesk, Inc.
CB #5 TO CB #6
Q (cfs)
Circular
Area (sqft)
Diameter (ft)
= 3.00
Invert Elev (ft)
= 888.60
Slope ( %)
= 0.50
N -Value
= 0.013
Calculations
EGL (ft)
Compute by:
Known Q
Known Q (cfs)
= 10.40
Elev (ft)
892.00
Section
Tuesday, Aug 19 2014
Highlighted
Depth (ft)
= 0.96
Q (cfs)
= 10.40
Area (sqft)
= 1.96
Velocity (ft/s)
= 5.31
Wetted Perim (ft)
= 3.61
Crit Depth, Yc (ft)
= 1.02
Top Width (ft)
= 2.80
EGL (ft)
= 1.40
1 2 3 4
Reach (ft)
Depth (ft)
3.40
2.40
1.40
0.40
.n
-1.60
5

Channel Report
Hydraflow Express Extension for AutoCAD® Civil 3D® 2013 by Autodesk, Inc.
CB #6 TO CB #7
Q (Cfs)
Circular
Area (sqft)
Diameter (ft)
= 3.00
Invert Elev (ft)
= 888.10
Slope ( %)
= 0.50
N -Value
= 0.013
Calculations
EGL (ft)
Compute by:
Known Q
Known Q (cfs)
= 14.30
Elev (ft)
892.00
1:I:191b1
887.00
0
Section
Tuesday, Aug 19 2014
Highlighted
Depth (ft)
= 1.13
Q (Cfs)
= 14.30
Area (sqft)
= 2.45
Velocity (ft /s)
= 5.84
Wetted Perim (ft)
= 3.97
Crit Depth, Yc (ft)
= 1.21
Top Width (ft)
= 2.91
EGL (ft)
= 1.66
1 2 3 4
Reach (ft)
Depth (ft)
3.90
PAISI47
iUVI
[4,111111
SAAR
1.10
5

Channel Report
Hydraflow Express Extension for AutoCAD® Civil 3D® 2013 by Autodesk, Inc.
CB #7 TO CB #7A
Q (cfs)
Circular
Area (sqft)
Diameter (ft)
= 3.00
Invert Elev (ft)
= 887.10
Slope ( %)
= 0.50
N -Value
= 0.013
Calculations
EGL (ft)
Compute by:
Known Q
Known Q (cfs)
= 18.00
Elev (ft)
891.00
::: M,
887.00
Section
Tuesday, Aug 19 2014
Highlighted
Depth (ft)
= 1.29
Q (cfs)
= 18.00
Area (sqft)
= 2.93
Velocity (ft/s)
= 6.15
Wetted Perim (ft)
= 4.30
Crit Depth, Yc (ft)
= 1.36
Top Width (ft)
= 2.97
EGL (ft)
= 1.88
1 2 3 4
Reach (ft)
Depth (ft)
3.90
2.90
1.90
wi
-0.10
1.10
5

Channel Report
Hydraflow Express Extension for AutoCAD® Civil 3D® 2013 by Autodesk, Inc.
CB #202 TO CB #201
Circular
Diameter (ft) = 1.25
Invert Elev (ft) = 895.00
Slope ( %) = 0.50
N -Value = 0.013
Calculations
Compute by: Known Q
Known Q (cfs) = 0.30
Elev (ft)
897.00
896.50
895.50
895.00
894.50
Tuesday, Aug 19 2014
Highlighted
Depth (ft)
= 0.22
Q (cfs)
= 0.300
Area (sqft)
= 0.15
Velocity (ft/s)
= 2.04
Wetted Perim (ft)
= 1.09
Crit Depth, Yc (ft)
= 0.22
Top Width (ft)
= 0.96
EGL (ft)
= 0.28
Section
0 1 2 3
Reach (ft)

Channel Report
Hydraflow Express Extension for AutoCAO® Civil 300 2013 by Autodesk, Inc.
CB #200 TO CB #201
Circular
Diameter (ft) = 1.25
Invert Elev (ft) = 895.00
Slope ( %) = 0.50
N -Value = 0.013
Calculations
Compute by: Known Q
Known Q (cfs) = 1.20
Elev (ft)
896.50
• . rt rt
895.50
• rt rt
894.50
Tuesday, Aug 19 2014
Highlighted
Depth (ft)
= 0.44
Q (cfs)
= 1.200
Area (sqft)
= 0.39
Velocity (ft/s)
= 3.08
Wetted Perim (ft)
= 1.59
Crit Depth, Yc (ft)
= 0.44
Top Width (ft)
= 1.20
EGL (ft)
= 0.59
Section
0 1 2 3
Reach (ft)

Channel Report
Hydraflow Express Extension for AutoCAD® Civil 3D® 2013 by Autodesk, Inc.
CB #201 TO CB #203
Q (cfs)
Circular
Area (sqft)
Diameter (ft)
= 1.25
Invert Elev (ft)
= 893.80
Slope ( %)
= 0.50
N -Value
= 0.013
Calculations
EGL (ft)
Compute by:
Known Q
Known Q (cfs)
= 2.20
Elev (ft) Section
896.00
r
895.50
895.00
894.50
893.50
893.00
Tuesday, Aug 19 2014
Highlighted
Depth (ft)
= 0.61
Q (cfs)
= 2.200
Area (sqft)
= 0.60
Velocity (ft/s)
= 3.68
Wetted Perim (ft)
= 1.94
Crit Depth, Yc (ft)
= 0.60
Top Width (ft)
= 1.25
EGL (ft)
= 0.82
Depth (ft)
2.20
iwlf •
1.20
[Ill
0.20
-0.30
_0.80
1 2 3 4
Reach (ft)

Channel Report
Hydraflow Express Extension for AutoCAD® Civil 3D® 2013 by Autodesk, Inc.
CB #203 TO CB #7A
Circular
Diameter (ft) = 1.25
Invert Elev (ft) = 887.10
Slope ( %) = 9.00
N -Value = 0.013
Calculations
Compute by: Known Q
Known Q (cfs) = 2.80
Tuesday, Aug 19 2014
Highlighted
Depth (ft)
= 0.32
Q (cfs)
= 2.800
Area (sqft)
= 0.25
Velocity (ft/s)
= 11.18
Wetted Perim (ft)
= 1.33
Crit Depth, Yc (ft)
= 0.68
Top Width (ft)
= 1.09
EGL (ft)
= 2.26
Elev (ft) Section
889.00
l
888.50
f
887.00
886.50 1 1 1 1
0 1 2 3
Reach (ft)

Channel Report
Hydraflow Express Extension for AutoCAD® Civil 3D@2013 by Autodesk, Inc.
CB #7A TO CB #208
Q (Cfs)
Circular
Area (sqft)
Diameter (ft)
= 3.00
Invert Elev (ft)
= 886.20
Slope ( %)
= 9.00
N -Value
= 0.013
Calculations
EGL (ft)
Compute by:
Known Q
Known Q (cfs)
= 21.60
Elev (ft)
s9o.00
887.00
::. M
Section
Tuesday, Aug 19 2014
Highlighted
Depth (ft)
= 0.67
Q (Cfs)
= 21.60
Area (sqft)
= 1.18
Velocity (fbs)
= 18.31
Wetted Perim (ft)
= 2.95
Crit Depth, Yc (ft)
= 1.50
Top Width (ft)
= 2.50
EGL (ft)
= 5.88
1 2 3 4
Reach (ft)
Depth (ft)
3.80
MR
1.80
-0.20
1.20
5

Channel Report
HydraFlow Express Extension for AutoCAD® Civil 3D® 2013 by Autodesk, Inc.
CB #204TO CB #205
Circular
Diameter (ft) = 1.25
Invert Elev (ft) = 894.00
Slope ( %) = 0.50
N -Value = 0.013
Calculations
Compute by: Known Q
Known Q (cfs) = 2.00
Elev (ft)
896.00
895.50
895.00
1.1.01 ,96161
13-611 Kill"
393.50
Tuesday, Aug 19 2014
Highlighted
Depth (ft)
= 0.58
Q (cfs)
= 2.000
Area (sqft)
= 0.56
Velocity (ft/s)
= 3.58
Wetted Perim (ft)
= 1.87
Crit Depth, Yc (ft)
= 0.57
Top Width (ft)
= 1.25
EGL (ft)
= 0.78
Section
0 1 2 3
Reach (ft)

Channel Report
Hydraflow Express Extension for AutoCAD® Civil 3D® 2013 by Autodesk, Inc.
CB #205TO CB #207
Circular
Diameter (ft) = 1.25
Invert Elev (ft) = 893.30
Slope ( %) = 0.50
N -Value = 0.013
Calculations
Compute by: Known Q
Known Q (cfs) = 3.30
Elev (ft)
895.00
[ *06111
E:I'L•11fII1]
893.50
F.kRillN;
892.50
Tuesday, Aug 19 2014
Highlighted
Depth (ft)
= 0.79
Q (cfs)
= 3.300
Area (sqft)
= 0.82
Velocity (ft/s)
= 4.03
Wetted Perim (ft)
= 2.30
Crit Depth, Yc (ft)
= 0.74
Top Width (ft)
= 1.20
EGL (ft)
= 1.04
Section
0 1 2 3
Reach (ft)

Channel Report
Hydraflow Express Extension for AutoCAD® Civil 3D® 2013 by Autodesk, Inc.
CB #206TO CB #207
Circular
Diameter (ft) = 1.25
Invert Elev (ft) = 893.30
Slope ( %) = 0.50
N -Value = 0.013
Calculations
Compute by: Known Q
Known Q (cfs) = 2.00
Elev (ft)
895.00
894.50
893.50
893.00
892.50
Tuesday, Aug 19 2014
Highlighted
Depth (ft)
= 0.58
Q (cfs)
= 2.000
Area (sqft)
= 0.56
Velocity (ft/s)
= 3.58
Wetted Perim (ft)
= 1.87
Crit Depth, Yc (ft)
= 0.57
Top Width (ft)
= 1.25
EGL (ft)
= 0.78
Section
0 1 2 3
Reach (ft)

Channel Report
Hydraflow Express Extension for AutoCAD® Civil 3D® 2013 by Autodesk, Inc.
CB #207TO CB #208
Circular
Diameter (ft) = 1.25
Invert Elev (ft) = 893.30
Slope ( %) = 14.48
N -Value = 0.013
Calculations
Compute by: Known Q
Known Q (cfs) = 7.40
Elev (ft)
895.00
894.50
894.00
893.50
892.50
Tuesday, Aug 19 2014
Highlighted
Depth (ft)
= 0.47
Q (cfs)
= 7.400
Area (sqft)
= 0.43
Velocity (ft/s)
= 17.40
Wetted Perim (ft)
= 1.66
Crit Depth, Yc (ft)
= 1.09
Top Width (ft)
= 1.21
EGL (ft)
= 5.17
Section
0 1 2 3
Reach (ft)

Channel Report
Hydraflow Express Extension for AutoCAD® Civil 3138 2013 by Autodesk, Inc.
CB #208TO CB #7B
Q (cfs)
Circular
Area (sqft)
Diameter (ft)
= 3.00
Invert Elev (ft)
= 885.60
Slope ( %)
= 0.50
N -Value
= 0.013
Calculations
EGL (ft)
Compute by:
Known Q
Known Q (cfs)
= 30.30
Elev (ft)
889.00
887.00
Section
Tuesday, Aug 19 2014
Highlighted
Depth (ft)
= 1.75
Q (cfs)
= 30.30
Area (sqft)
= 4.29
Velocity (ft/s)
= 7.07
Wetted Perim (ft)
= 5.22
Crit Depth, Yc (ft)
= 1.79
Top Width (ft)
= 2.96
EGL (ft)
= 2.53
1 2 3 4
Reach (ft)
Depth (ft)
3.40
ME
iM1r11]
0.40
s ISM
1.60
5

Channel Report
Hydraflow Express Extension for AutoCAD® Civil 3D® 2013 by Autodesk, Inc.
RING CB #3 TO RING CB #4
Circular
= 2.300
Diameter (ft)
= 1.25
Invert Elev (ft)
= 892.88
Slope ( %)
= 0.50
N -Value
= 0.013
Calculations
= 1.25
Compute by:
Known Q
Known Q (cfs)
= 2.30
Elev (ft) Section
895.00
(
894.50
893.50
893.00
892.50
892.00
Tuesday, Aug 19 2014
Highlighted
Depth (ft)
= 0.63
Q (cfs)
= 2.300
Area (sqft)
= 0.62
Velocity (ft/s)
= 3.71
Wetted Perim (ft)
= 1.97
Crit Depth, Yc (ft)
= 0.61
Top Width (ft)
= 1.25
EGL (ft)
= 0.84
Depth (ft)
2.12
1.62
IMP)
WE
FISM
IM
-0.88
0 1 2 3 4
Reach (ft)

Channel Report
Hydraflow Express Extension for AutoCAD® Civil 3D® 2013 by Autodesk, Inc.
RING CB #4 TO CB #7B
Circular
Diameter (ft) = 1.25
Invert Elev (ft) = 885.60
Slope ( %) = 20.80
N -Value = 0.013
Calculations
Compute by: Known Q
Known Q (cfs) = 4.00
Elev (ft)
887.00
7-0111911
885.50
885.00
Tuesday, Aug 19 2014
Highlighted
Depth (ft)
= 0.31
Q (cfs)
= 4.000
Area (sqft)
= 0.24
Velocity (fUs)
= 16.76
Wetted Perim (ft)
= 1.31
Crit Depth, Yc (ft)
= 0.81
Top Width (ft)
= 1.08
EGL (ft)
= 4.68
Section
0 1 2 3
Reach (ft)

Channel Report
Hydraflow Express Extension for AutoCAD® Civil 3D® 2013 by Autodesk, Inc.
CB #7B TO CB #7C
Q (cfs)
Circular
Area (sqft)
Diameter (ft)
= 3.00
Invert Elev (ft)
= 881.00
Slope ( %)
= 0.50
N -Value
= 0.013
Calculations
EGL (ft)
Compute by:
Known Q
Known Q (cfs)
= 34.90
Elev (ft)
885.00
E:I:MIII;
1 *19111I41
:: 11
881.00
880.00
0
Section
Tuesday, Aug 19 2014
Highlighted
Depth (ft)
= 1.92
Q (cfs)
= 34.90
Area (sqft)
= 4.78
Velocity (ft /s)
= 7.30
Wetted Perim (ft)
= 5.56
Crit Depth, Yc (ft)
= 1.92
Top Width (ft)
= 2.88
EGL (ft)
= 2.75
1
2 3
Reach (ft)
4
Depth (ft)
4.00
3.00
2.00
1.00
1 11
-1.00
5

Channel Report
Hydraflow Express Extension for AutoCAD® Civil 3D® 2013 by Autodesk, Inc.
RING CB #1 TO RING CB #2
Circular
Diameter (ft) = 1.25
Invert Elev (ft) = 893.32
Slope ( %) = 0.50
N -Value = 0.013
Calculations
Compute by: Known Q
Known Q (cfs) = 1.30
Elev (ft)
895.00
894.50
893.50
893.00
892.50
Tuesday, Aug 19 2014
Highlighted
Depth (ft)
= 0.46
Q (cfs)
= 1.300
Area (sqft)
= 0.41
Velocity (ft/s)
= 3.16
Wetted Perim (ft)
= 1.63
Crit Depth, Yc (ft)
= 0.45
Top Width (ft)
= 1.21
EGL (ft)
= 0.62
Section
0 1 2 3
Reach (ft)

Channel Report
Hydraflow Express Extension for AutoCAD® Civil 3Da0 2013 by Autodesk, Inc.
RING CB #2 TO CB #7C
Circular
Diameter (ft) = 1.25
Invert Elev (ft)
= 881.00
Slope ( %)
= 28.65
N -Value
= 0.013
Calculations
= 15.33
Compute by:
Known Q
Known Q (cfs)
= 2.40
Elev (ft)
883.00
E:I311441I9:
881.50
881.00
Tuesday, Aug 19 2014
Highlighted
Depth (ft)
= 0.23
Q (cfs)
= 2.400
Area (sqft)
= 0.16
Velocity (fUs)
= 15.33
Wetted Perim (ft)
= 1.11
Crit Depth, Yc (ft)
= 0.62
Top Width (ft)
= 0.97
EGL (ft)
= 3.88
Section
0 1 2 3
Reach (ft)

Channel Report
Hydraflow Express Extension for AutoCADQD Civil 3D® 2013 by Autodesk, Inc.
CB #7C TO CB #7D
Q (cfs)
Circular
Area (sqft)
Diameter (ft)
= 3.00
Invert Elev (ft)
= 854.00
Slope ( %)
= 11.39
N -Value
= 0.013
Calculations
EGL (ft)
Compute by:
Known Q
Known Q (cfs)
= 37.90
Elev (ft)
ass.00
857.00
856.00
855.00
854.00
853.00
0
Section
Tuesday, Aug 19 2014
Highlighted
Depth (ft)
= 0.83
Q (cfs)
= 37.90
Area (sqft)
= 1.60
Velocity (ft/s)
= 23.67
Wetted Perim (ft)
= 3.33
Crit Depth, Yc (ft)
= 2.00
Top Width (ft)
= 2.69
EGL (ft)
= 9.54
1
2 3
Reach (ft)
0
Depth (ft)
4.00
3.00
2.00
1.00
M
-1.00
5

Channel Report
Hydraflow Express Extension for AutoCAD® Civil 3D® 2013 by Autodesk, Inc.
CB #71D TO CB #7E
Circular
Diameter (ft) = 3.00
Invert Elev (ft) = 843.50
Slope ( %) = 7.57
N -Value = 0.013
Calculations
Compute by: Known Q
Known Q (cfs) = 39.70
Elev (ft)
847.00
845.00
843.00
842.00
0
Section
Tuesday, Aug 19 2014
Highlighted
Depth (ft)
= 0.95
Q (cfs)
= 39.70
Area (sgft)
= 1.94
Velocity (ft /s)
= 20.46
Wetted Perim (ft)
= 3.60
Crit Depth, Yc (ft)
= 2.05
Top Width (ft)
= 2.80
EGL (ft)
= 7.46
Depth (ft)
3.50
1
2 3
Reach (ft)
Ir
2.50
1.50
0.50
-0.50
-1.50
5

Channel Report
Hydraflow Express Extension for AutoCAD® Civil 3D® 2013 by Autodesk, Inc.
CB #7E TO DIVERTER
Q (Cfs)
Circular
Area (sqft)
Diameter (ft)
= 3.00
Invert Elev (ft)
= 822.50
Slope ( %)
= 11.70
N -Value
= 0.013
Calculations
EGL (ft)
Compute by:
Known Q
Known Q (cfs)
= 41.50
Elev (ft)
826.00
825.00
824.00
823.00
822.00
821.00
0
Section
Tuesday, Aug 19 2014
Highlighted
Depth (ft)
= 0.87
Q (Cfs)
= 41.50
Area (sqft)
= 1.71
Velocity (ft /s)
= 24.25
Wetted Perim (ft)
= 3.42
Crit Depth, Yc (ft)
= 2.10
Top Width (ft)
= 2.73
EGL (ft)
= 10.01
i
2 3
Reach (ft)
4
Depth (ft)
3.50
M111
1.50
0.50
-0.50
1.50
5

Channel Report
Hydraflow Express Extension for AutoCAD® Civil 3D® 2013 by Autodesk, Inc.
DIVERTER TO JB #4
Q (cfs)
Circular
Area (sqft)
Diameter (ft) =
3.00
Invert Elev (ft) =
822.25
Slope ( %) =
0.50
N -Value =
0.013
Calculations
EGL (ft)
Compute by: Known Q
Known Q (cfs) =
41.50
Elev (ft)
826.00
825.00
824.00
823.00
822.00
821.00
0
Section
Tuesday, Aug 19 2014
Highlighted
Depth (ft)
= 2.18
Q (cfs)
= 41.50
Area (sqft)
= 5.52
Velocity (fUs)
= 7.52
Wetted Perim (ft)
= 6.13
Crit Depth, Yc (ft)
= 2.10
Top Width (ft)
= 2.67
EGL (ft)
= 3.06
Depth (ft)
3.75
1
2 3
Reach (ft)
4
2.75
1.75
0.75
Q11VA
-1.25
5

Channel Report
Hydraflow Express Extension for AutoCAD® Civil 3D® 2013 by Autodesk, Inc.
JB #4 TO JB #5
Q (cfs)
Circular
Area (sqft)
Diameter (ft)
= 3.00
Invert Elev (ft)
= 821.80
Slope ( %)
= 0.50
N -Value
= 0.013
Calculations
EGL (ft)
Compute by:
Known Q
Known Q (cfs)
= 43.60
Elev (ft)
825.00
I
824.00
823.00
822.00
821.00
820.00
0
Section
Tuesday, Aug 19 2014
Highlighted
Depth (ft)
= 2.28
Q (cfs)
= 43.60
Area (sqft)
= 5.77
Velocity (ft/s)
= 7.55
Wetted Perim (ft)
= 6.36
Crit Depth, Yc (ft)
= 2.16
Top Width (ft)
= 2.56
EGL (ft)
= 3.17
1 2 3 4
Reach (ft)
Depth (ft)
3.20
2.20
1.20
0.20
:o
-1.80
5

Channel Report
Hydraflow Express Extension for AutoCAD® Civil 3D® 2013 by Autodesk, Inc.
JB #5 TO CABIN
CB #6
Circular
Area (sqft)
Diameter (ft)
= 3.00
Invert Elev (ft)
= 820.80
Slope ( %)
= 0.50
N -Value
= 0.013
Calculations
EGL (ft)
Compute by:
Known Q
Known Q (cfs)
= 44.60
Elev (ft)
824.00
823.00
822.00
821.00
820.00
Section
Tuesday, Aug 19 2014
Highlighted
Depth (ft)
= 2.33
Q (Cfs)
= 44.60
Area (sqft)
= 5.90
Velocity (ft/s)
= 7.56
Wetted Perim (ft)
= 6.48
Crit Depth, Yc (ft)
= 2.18
Top Width (ft)
= 2.49
EGL (ft)
= 3.22
1 2 3 4
Reach (ft)
Depth (ft)
3.20
2.20
1.20
0.20
Kum
-1.80
5

Channel Report
Hydraflow Express Extension for AutoCAD® Civil 3D® 2013 by Autodesk, Inc.
CABIN CB #6 -OUT
Q (cfs)
Circular
Area (sqft)
Diameter (ft)
= 3.00
Invert Elev (ft)
= 818.00
Slope ( %)
= 3.83
N -Value
= 0.013
Calculations
EGL (ft)
Compute by:
Known Q
Known Q (cfs)
= 45.70
Elev (ft)
822.00
(
1- MR1If:
ES0I411I01
I:
rit1101
817.00
0
Section
Tuesday, Aug 19 2014
Highlighted
Depth (ft)
= 1.23
Q (cfs)
= 45.70
Area (sqft)
= 2.73
Velocity (fUs)
= 16.74
Wetted Perim (ft)
= 4.17
Grit Depth, Yc (ft)
= 2.20
Top Width (ft)
= 2.95
EGL (ft)
= 5.59
1
2 3
Reach (ft)
0
Depth (ft)
4.00
3.00
2.00
1.00
M
-1.00
5