HomeMy WebLinkAbout1.04 Grading and DrainageCivil- ENC iNEERING
November 6, 2015
Revised December 22, 2015
Revised February 5, 2016
Revised February 10, 2016
Legacy Homes
Attn: Jeff Sabo
5889 County Road 109
Carbondale, CO 81623
LAND SURVEYING
Re: Drainage Review of Lot A, Beulah Wilson Subdivision as depicted on the Site Plan and
Topographic Survey prepared by the Pinnacle Design Consulting Group, lnc, dated
February 9, 2016
HCE Project No: 21.51074.00
Dear Jeff,
High Country Engineering Inc. (HCE) has been engaged by Legacy Homes to evaluate the storm
water surface drainage of Lot A, Beulah Wilson Subdivision as depicted on the Site Plan and
TupMrcgrhic Su vev. prepared by the Pinnacle Design Consulting Group, Inc, dated February 9,
2016.
Below is a summary of the drainage evaluation:
Lot A, Beulah Wilson Subdivision exemption is situated within Section 28, Township 7 South,
Range 88 West, of the 6'h Principle meridian, in Garfield County Colorado,
Lot A slopes downward from West to East towards the Kaiser Sievers Irrigation Ditch, and towards
County Road 109, which are both situated long the easterly frontage of the site.
According the Soil Surveyor Aspen -Gypsum Area Colorado, published by the United States
Department of Agriculture, Soil Conservation Service, the native soil at the site is classified as
Tridall - Brownsto stony sandy learns. This soil is characterized as deep and well drained, within
Hydrologic Soils Group B.
According to the NOAA Atlas 2, Volume III, prepared by the National Oceanic and Atmospheric
Administration, the 2 -year 24-hour precipitation is I.1 inch, 25 -year 24-hour precipitation is 1.2 inch,
and the 100 -year 24-hour precipitation is l.5 inch.
Peak runoff rates have been calculated using the United States Department of Agriculture's
Technical Release 55 (TR -55) method.
1517 Blake Avenue, Suite 101
Glenwood Springs, Ce SIti01
I-elcphone(970) 945-8676
Fax (970) 945.2555
Legacy Homes
November 6, 2015
Revised: December 22, 1015
Revised: February 5, 2016
Revised: February 10, 2016
HCE Project: 2151074.00
Pat4c 12
Existing Drainage Basin EX -I is situated in the westerly portion of the site, has an area of 1.29 acre,
a weighted Curve Number of 67, and discharges sheet flow runoff towards portions of both the
Kaiser Sievers Irrigation Ditch and roadside ditch adjacent to County Road 109. The Time of
Concentration has been calculated as 0.09 Hour. The peak 100—year runoff rate from basin EX -1 has
been calculated as 0.58 cubic feet per second.
Existing Drainage Basin EX -2 is situated in the easterly portion of the site, has an area of 0.30 acre, a
weighted Curve Number of 66, and discharges sheet flow runoff towards the roadside ditch adjacent
to County Road 109. The Time of Concentration has been calculated as 0.03 Hour. The peak 100—
year runoff rate from basin EX -2 has been calculated as 0.13 cubic feet per second.
Existing Drainage Basin EX -3 is situated in the southerly portion of the site, has an area of 0.52 acre,
a weighted Curve Number of 62, and discharges sheet flow runoff towards the roadside ditch
adjacent to County Road 109. The Time of Concentration has been calculated as 0.08 Hour. The peak
100—year runoff rate from basin EX -3 has been calculated as 0.10 cubic feet per second.
The combined Existing Drainage Basins EX -1, EX -2 and EX -3 encompass the entire site; have an
area of 2.11 acres, a weighed Curve Number of 65 and discharges sheet flow runoff towards portions
of both the Kaiser Sievers Irrigation Ditch and the roadside ditch adjacent to County Road 109. The
Time of Concentration has been calculated as 0.09 Hour. The peak 100—year runoff rate from the
combined basins EX -1, EX -2 and EX -3 has been calculated as 0.91 cubic feet per second.
We have conservatively verified thatthe existing 18 -inch diameter culvert, as depicted on the Site
Plan and Top�hic Surveyprel)a ed by the Pinnacle Design Consulting Grovl), Inc, dated
February 9, 2016. situated beneath County Road 109 has adequate capacity to convey the entire
site's peak 100 -year runoff rate of 0.91 cubic feet per second.
Please contact us if we can be of further assistance,
Sincerel .,O\\o, `,00 UC` ,
Y
Thomas
Project I
U.S. Department of Agriculture
Natural Resources Conservation Service
TR 56 Worksheet 2: Runoff Curve Number and Runoff
Project: Lot A, Beulah Wilson Subdivision
Location: Basin EX -1
Check one: FPresent F—Developed
1. Runoff curve number (CN)
Designed By: HCE
Checked: HCE
FL -ENG -21A
06104
Date: 1/28/16
Date: 1/28/16
Soil name
and hydrologic
group
(Appendix A)
Cover description
( Cover type, treatment, and hydrologic
condition; percent impervious;
unconnected/connected impervious area
ratio
CIM1'
Area
p acres
❑ mi2
❑ %
Product
of
CN x area
Table
2-2,1
Fig.
2-3
Fig.
2-4
Tridall-Brownsto B
Open Space Good Condition
61
0.35
1.09
66.5
Tridall-Brownsto B
Impervious Areas
96
0.20
19.6
'-' Use only one CN source per line. Totals =
129
86.1
CN (weighted) = total product =
total area
2. Runoff
86.1 = 67 Use CN =
67
1.29
Frequency .......................................... years
Rainfall, P (24 hour) ............................ in.
Runoff, Q ............................................ in.
(Use P and CN with Table 2-1, Figure 2-1,
or equations 2-3 and 2-4.)
Storm #1
Storm #2
Storm #3
2
25
100
1.1
2.1
2.5
0.002
0.20
0.35
U.S. Department of Aggnculture
Natural Resources conservation Service
TR 55 Worksheet 3: Time of Concentration (T,) or Travel Time (Tt)
Project: Lot A, Beulah Wilson Subdivision
Location: Basin EX -1
Designed By: HCE
Checked By: HCE
Check one: V Present Developed
Check one: T� Tt ✓ through subarea Basin EX -1
FL -ENG -21B
06/04
Date: 1128/16
Date: 1/28/16
NOTES: Space for as many as two segments per flow type can be used for each worksheet. Include a map, schematic,
or description of flow segments.
Sheet Flow (Applicable to T, only) Segment ID
1. Surface description (Table 3-1) ................................................
2. Manning's roughness coeff., n (Table 3-1) ..............................
3. Flow length, L (total L < 100 ft) .............................................. ft
4. Two-year 24-hour rainfall, PZ .................................................. in
5. Land slope, s....................................................................... ft/ft
6. Tt = 0.007 K) 08 Compute Tt.... ...................... hr
P2 05 SO4
Shallow Concetrated Flow Segment ID
7. Surface description (paved or unpaved) ...................................
8. Flow length, L......................................................................... ft
9. Watercourse slope, s ........................................................... ft/ft
10. Average velocity, V (Figure 3-1) .......................................... fus
11. Tt = L Compute Tt ......................... hr
3600 V
Channel Flow Segment ID
12. Cross sectional flow area, a ............................................... ft2
13. Wetted perimeter, Pw......................................................... ft
14. Hydraulic radius, r = a Compute r .................................. ft
Pw
I
Short Grass
0.15
56
1.1
0.214
m
Paved
323
0.062
5.0
0.02 +
15. Channel Slope, s ............................................................ ft/ft
16. Manning's Roughness Coeff., n ............................................
17. V = 1.49 r23st2 Compute V ...................... fus
n
18. Flow length, L...................................................................... ft
19. Tt = L Compute Tt.................6.................. hr + _
3600 V
20. Watershed or subarea T, or Tt (add Tt in steps 6, 11, and 19................................................................. hr 0.09
U.S. Department of Agriculture
Natural Resources Conservation Service
Tr 55 Worksheet 4: Graphical Peak Discharge Method
Project: Lot A, Beulah Wilson Subdivision Designed By: HCE
Location: Basin EX -1 Checked By: HCE
Check one: / Present_ Developed
1. Data:
Drainage area ................ Am = 0.0020 mit (acres/640)
Runoff curve number .... CN = 67 (From Worksheet 2)
Time of concentration ..... Tc = 0.09 hr (From Worksheet 3)
Rainfall distribution type ...... = II (II, III, DMVIII)
Pond and swamp areas spread
throughout watershed ................ = 0 percent of Am ( 0
2. Frequency ................................................... yr
FL -ENG -21C
06/04
Date: 1/28/16
Date: 1/28/16
acres or mit covered)
Storm #1
Storm #2
Storm #3
2
25
100
3. Rainfall, P (24-hour) .................................... in 1.1 2.1 2.5
4. Initial abstraction, la ..................................... in 0.985 0.985 0.985
(Use CN with Table 4-1.)
5. Compute la/P.................................................. 0.90 0.47 0.39
6. Unit peak discharge, q ............................. csm/in 550 625 825
(Use T, and la/P with exhibit 4- II )
7. Runoff, Q .............................. ........ in 0.002 0.20 0.35
(From Worksheet 2)
8. Pond and swamp adjustment factor, Fp........ in 1.00 1.00 1.00
(Use percent pond and swamp area
with Table 4-2. Factor is 1.0 for zero
percent pond and swamp area.)
9. Peak discharge, qp........................ ............. I CfS 0.002 0.25 0.58
(Where qp = q„AmQFp)
U.S. Department of Agdculture
Natural Resources Conservation Service
TR 55 Worksheet 2: Runoff Curve Number and Runoff
Project: Lot A, Beulah Wilson Subdivision
Location: Basin EX -2
Check one: F" Present F Developed
1. Runoff curve number (CN)
Designed By: HCE
Checked: HCE
FL -ENG -21A
06104
Date: 1128116
Date: 1128/16
Soil name
and hydrologic
group
(Appendix A)
Cover description
( Cover type, treatment, and hydrologic
condition; percent impervious;
unconnected/connected impervious area
ratio
QN 1.'
Area
t7 acres
p mit
p
Product
of
CN x area
Table
2-2-
Fig.
2-3
Fig.
2-4
Tridall-Brownsto B
Open Space Good Condition
61
0.32
0.26
15.9
Tridall-Brownsto B
Impervious Areas
98
0.04
3.9
--' Use only one CN source per line. Totals =
0.30
19.8
CN (weighted) = total product =
total area
2. Runoff
19.8 = 66 Use CN =
0.30 66
Frequency .......................................... years
Rainfall, P (24 hour) ............................ in.
Runoff, Q ............................................ in.
(Use P and CN with Table 2-1, Figure 2-1,
or equations 2-3 and 2-4.)
Storm #1
Storm #2
Storm #3
2
25
100
1.1
2.1
2.5
0.001
0.18
0.32
U.S. Department of Agriculture
Natural Resources Conservation Service
TR 55 Worksheet 3: Time of Concentration (T,) or Travel Time (Tt)
Project: Lot A, Beulah Wilson Subdivision
Location: Basin EX -2
Check one: v/ Present Developed
Check one: To
Designed By: HCE
Checked By: HCE
Tt v/ through subarea Basin EX -2
FL -ENG -215
06104
Date: 1128/16
Date: 1/28116
NOTES: Space for as many as two segments per Flow type can be used for each worksheet. Include a map, schematic,
or description of flow segments.
Sheet Flow (Applicable to T„ only) Segment ID
1. Surface description (Table 3-1) ................................................
2. Manning's roughness coeff., n (Table 3-1) ..............................
3. Flow length, L (total L < 100 ft) .............................................. ft
4. Two-year 24-hour rainfall, Pz.................................................. it
5. Land slope. s....................................................................... ft/fl
6. Tt = 0.007 (nL) 00 Compute Tt.......................... hr
P2 05 SO4
Shallow Concetrated Flow Segment ID
7. Surface description (paved or unpaved) ...................................
8. Flow length, L......................................................................... ft
9. Watercourse slope, s ........................................................... ft/ft
10. Average velocity, V (Figure 3-1) .......................................... ftIs
11. Tt = L Compute Tt ......................... hr
3600 V
Channel Flow Segment ID
12. Cross sectional flow area, a ............................................... ftz
13. Wetted perimeter, P,..... ......................................................... ft
14. Hydraulic radius, r = a Compute r .................................. ft
Pw
15. Channel Slope, s ............................................................ ft/ft
16. Manning's Roughness Coeff., n ............................................
17. V = 1.49 r23 s112 Compute V ...................... ft/s
n
I
Short Grass
0.15
6
1.1
0.020
m
Paved
85
0.106
6.0
0.004 +
18. Flow length, L...................................................................... ft
19. Tt = L Compute Tt.................................... hr + _
3600 V
20. Watershed or subarea T, or Tt (add Tt in steps 6, 11, and 19....................................................0............ hr FO.03
U.S. Department of Agriculture
Natural Resources Conservation Service
Tr 55 Worksheet 4: Graphical Peak Discharge Method
Project: Lot A, Beulah Wilson Subdivision Designed By: HCE
Location: Basin EX -2 Checked By: HCE
Check one: V Present _Developed
1. Data
Drainage area ................ Am = 0.0005 mit (acres/640)
Runoff curve number .... CN = 66 (From Worksheet 2)
Time of concentration ..... To = 0.03 hr (From Worksheet 3)
Rainfall distribution type ...... = II (II, III, DMVIII)
Pond and swamp areas spread
throughout watershed ................ = 0
2. Frequency ................................................... yr
FL -ENG -21C
06!04
Date: 1/28/16
Date: 1/28/16
percent of Am ( 0 acres or mit covered)
Storm #1
Storm #2
Storm #3
2
25
100
3. Rainfall, P (24-hour) .................................... in 1.1 2.1 2.5
4. Initial abstraction, la ..................................... in 1.030 1.030 1.030
(Use CN with Table 4-1.)
5. Compute la/P.................................................. 0.94 0.49 0.41
6. Unit peak discharge, q. ........................... csm/in ( 550 550 ( 800
(Use T, and la/P with exhibit 4- 11 )
7. Runoff, Q ..................................................... in 0.001 0.18 0.32
(From Worksheet 2)
B. Pond and swamp adjustment factor, Fp........ in 1.0 1.0 1.0
(Use percent pond and swamp area
with Table 4-2. Factor is 1.0 for zero
percent pond and swamp area.)
9. Peak discharge, qp...................................... cfs 0.0003 0.05 0.13
(Where qp = quAmQFp)
U.S. Department of Agriculture
Natural Resources conservation Service
TR 55 Worksheet 2: Runoff Curve Number and Runoff
Project: Lot A, Beulah Wilson Subdivision
Location: Basin EX -3
Check one: F Present F Developed
1. Runoff curve number (CN)
Designed By: HCE
Checked: HCE
FL -ENG -21A
06104
Date: 1/28/16
Date: 1/28/16
Soil name
and hydrologic
group
(Appendix A)
Cover description
( Cover type, treatment, and hydrologic
condition; percent impervious;
unconnected/connected impervious area
ratio
CNv
Area
El acres
p miz
❑ %
Product
of
CN x area
Table
2-2-
Fig.
2-3
Fig.
2-4
Tridall-Brownsto B
Open Space Good Condition
61
0.21
0.51
31.1
Tridall-Brownsto B
Impervious Areas
96
0.01
1.0
'- Use only one CN source per line. Totals =
0.52
32.1
CN (weighted) = total product =
total area
2. Runoff
32.1 = 62 Use CN =
62
0.52
Frequency .......................................... years
Rainfall, P (24 hour) ............................ in.
Runoff, Q ............................................ in.
(Use P and CN with Table 2-1, Figure 2-1,
or equations 2-3 and 2-4.)
Storm #1
Storm #2
Storm #3
2
25
100
1.1
2.1
2.5
0.003
0.10
0.21
U.S. Department of Agriculture
Natural Resources Conservation Service
TR 55 Worksheet 3: Time of Concentration (Te) or Travel Time (Ti)
Project: Lot A, Beulah Wilson Subdivision
Location: Basin EX -3
Designed By: HCE
Checked By: HCE
Check one: v/ Present Developed
Check one: Te Tt v/ through subarea Basin EX -3
FL -ENG -21 B
06104
Date: 1/28/16
Date: 1/28/16
NOTES: Space for as many as two segments per flow type can be used for each worksheet. Include a map, schematic,
or description of flow segments.
Sheet Flow (Applicable to T, only) Segment ID
1. Surface description (Table 3-1) ................................................
2. Manning's roughness coeff., n (Table 3-1) ..............................
3. Flow length, L (total L < 100 ft) .............................................. ft
4. Two-year 24-hour rainfall, Pz....... ,.......................................... in
5. Land slope, s....................................................................... ft/ft
6. T, = 0.007 (nL) 08 Compute Tt.......................... hr
P z 05 s04
Shallow Concetrated Flow Segment ID
7. Surface description (paved or unpaved) ...................................
8. Flow length, L......................................................................... ft
9. Watercourse slope, s ........................................................... ft/ft
10. Average velocity, V (Figure 3-1) .......................................... RIs
11. Tt = L Compute Tt ......................... hr
3600 V
Channel Flow Segment ID
1
Short Grass
0.15
48
1.1
0.167
2
Unpaved
270
0.104
5.0
0.02 +
12. Cross sectional flow area, a ............................................... ftz
13. Wetted perimeter, Pw....................................... ft
................
14. Hydraulic radius, r = a Compute r .................................. ft
Pw
15. Channel Slope, s .... ................................ ........................ ft/ft
16. Manning's Roughness Coeff., n ............................................
17. V = 1.49 rv3 s'n Compute V ...................... ft/S
n
18. Flow length, L...................................................................... ft
19. T, = L Compute Tt.................................... hr +
3600 V
20. Watershed or subarea T, or T, (add T, in steps 6, 11, and 19 ..........
0.02
a
........................................... hr 0.08
U.S. Department of Agriculture
Natural Resources Conservation Service
Tr 55 Worksheet 4: Graphical Peak Discharge Method
Project: Lot A, Beulah Wilson Subdivision Designed By HCE
Location: Basin EX -3 Checked By HCE
Check one: v/ Present Developed
1. Data:
Drainage area ................ Am =
Runoff curve number .... CN =
Time of concentration ..... Tc _
Rainfall distribution type ...... _
Pond and swamp areas spread
throughout watershed ..............
0.0008 mit (acres/640)
62 (From Worksheet 2)
0.08 hr (From Worksheet 3)
11 (II, III, DMVIII)
0 percent of Am ( 0
2. Frequency ................................................... yr
FL -ENG -21C
06/04
Date: 1/28/16
Date: 1/28/18
acres or mit covered)
Storm #1
Storm #2
Storm #3
2
25
100
3. Rainfall, P (24-hour) ........................ ....._ in 1.1 2.1 1 2.5
4. Initial abstraction, la ........................._ _. _ in 1.226 1.226 1.226
(Use CN with Table 4-1.)
5. Compute le/P.................................................. 1 1.11 1 0.58 1 0.49
6. Unit peak discharge, q. ........................... csm/in 550 550 575
(Use T. and la/P with exhibit 4- 11 )
7. Runoff, Q ..................................................... in 0.003 0.10 0.21
(From Worksheet 2)
8. Pond and swamp adjustment factor, Fp........ in 1.00 1.00 1.00
(Use percent pond and swamp area
with Table 4-2. Factor is 1.0 for zero
percent pond and swamp area.)
9. Peak discharge, qp.......... __......_....__. cfs 0.001 0.04 0.10
(Where qp = quAmQFp)
U.S. Department of Agriculture
Natural Resources conservation Service
TR 55 Worksheet 2: Runoff Curve Number and Runoff
Project: Lot A, Beulah Wilson Subdivision
Location: Basins EX -1, EX2 AND EX -3
Check one: +i Present r Developed
1. Runoff curve number (CN)
Designed By: HCE
Checked: HCE
FL -ENG -21A
06/04
Date: 215/16
Date: 2/5/16
Soil name
and hydrologic
group
(Appendix A)
Cover description
( Cover type, treatment, and hydrologic
condition; percent impervious;
unconnected/connected impervious area
ratio
QN v
Area
Elacres
pmi2
p%
Product
of
CN x area
Table
2-2-
Fig.
2-3
Fig.
2-4
Tridall-Brownsto B
Open Space Good Condition
61
0.31
1.86
113.5
Tridall-Brownsto B
Impervious Areas
98
0.25
24.5
-4r Use -only one CN source per linE-- - - - ------ -- -- Totals = -
2 t1—
-13811___
CN (weighted) = total product = _ 138.0 65
total area 2.11
2. Runoff
Frequency .......................................... years
Rainfall, P (24 hour) ............................ in.
Runoff, Q ............................................ in.
(Use P and CN with Table 2-1, Figure 2-1,
or equations 2-3 and 2-4.)
Use CN = 65
Storm #1
Storm #2
Storm #3
2
25
100
1.1
2.1
2.5
0.0003
0.17
0.31
U.S. Department of Agriculture
Natural Resources Conservation Service
TR 55 Worksheet 3: Time of Concentration (T°) or Travel Time (Tt)
Project: Lot A, Beulah Wilson Subdivision
Location: Basins EX -1, EX -2 and EX -3
Designed By: HCE
Checked By: HCE
Check one: t/ Present Developed
Check one: Tc Tt v( through subarea Basins EX -1, EX -2 AND EX -3
Date:
Date:
FL -ENG -21B
06104
2/5/16
2/5/16
NOTES: Space for as many as two segments per flow, type can be used for each worksheet. Include a map, schematic,
or description of flow segments.
Sheet Flow (Applicable to T, only) Segment ID
1. Surface description (Table 3-1) ................................................
2. Manning's roughness coeff., n (Table 3-1) ..............................
3. Flow length, L (total L < 100 ft) .............................................. ft
4. Two-year 24-hour rainfall, P2 .................................................. in
5. Land slope, s....................................................................... ft/ft
6. T, = 0.007 K) °'a Compute Tt.......................... hr
Py .5 SDA
Shallow Concetrated Flow Segment ID
7. Surface description (paved or unpaved) .................
8. Flow length, L......................................................................... ft
9. Watercourse slope, s ........................................................... ft/ft
10. Average velocity, V (Figure 3-1) .......................................... ft/s
11. Tt = L Compute T, ......................... hr
3600 V
Channel Flow Segment ID
12. Cross sectional flow area, a ............................................... ft2
13. Wetted perimeter, Pw......................................................... ft
14. Hydraulic radius, r = a Compute r .................................. ft
PW
--
T . annex lope,s-::-..—.—...............-........................ ff/ft
16. Manning's Roughness Coeff., n ............................................
17. V = 1.49 x213 5112 Compute V ...................... ft/s
n
18. Flow length, L..................................................................... ft
19. Tt = L Compute Tt.................................... hr
3600 V
20. Watershed or subarea T, or T, (add T, in steps 6, 11, and 19
m
Short Grass
0.15
56
1.1
0.214
2
Paved
409
0.071
5.5
0.02 +
hr 0.09
U.S. Department of Agriculture
Natural Resources conservation Service
Tr 55 Worksheet 4: Graphical Peak Discharge Method
Project: Lot A, Beulah Wilson Subdivision Designed By: HCE
Location: Basins EX -1, EX -2 and EX -3
Check one: 1/ Present _Developed
1. Data:
Checked By: HCE
Drainage area ................
An, =
0.0039
mit (acres/640)
Runoff curve number ....
CN =
65
(From Worksheet 2)
Time of concentration ..... T� =
Rainfall distribution type ...... =
Pond and swamp areas spread
throughout watershed ................ _
0.09 hr (From Worksheet 3)
11 (II, Ili, DMVIII)
FL -ENG -21C
06/04
Date: 2/5/16
Date: 2/5/16
0 percent of Am ( 0 acres or miz covered)
2. Frequency ................................................... yr
Storm #1
Storm #2
Storm #3
2
25
100
3. Rainfall, P (24-hour) .................................... in
4. Initial abstraction, le........
(Use CN with Table 4-1.)
5. Compute I./P... ............................
6. Unit peak discharge, q. ..... ................
(Use T. and la/P with exhibit 4- 11 )
in 1 1.077 1.077 1.077
0.98 0.51 0.43
csm/in 550 550 750
7. Runoff, Q ..................................................... in 0.0003 0.17 0.31
(From Workstieet 2)--�— _.
8. Pond and swamp adjustment factor, Fp........ in 1.00 1.00 1.00
(Use percent pond and swamp area
with Table 4-2. Factor is 1.0 for zero
percent pond and swamp area.)
9. Peak discharge, qP......... I ............................ Cfs 0.001 0.36 0.91
(Where qp = gaAn,QFP)
EXISTING 18" C .. "
ROADWAY SURFACE
PIPE CROWN
PIPE INVERT
TRIG. BASINS: EX -1, EX -2 & EX3
SLOPE: S: 0.0287 ft/ft
ROUGHNESS n: 0.024
PIPE DIAMETER: D: 1.50'
00—Yr FLOW RATE:
Q7oo:
0.91
cfs
00—Yr DEPTH:
dloo:
0.31
ft
DO—Yr FREEBOARD:
Fh1oo:
1.19
ft
00—Yr VELOCITY:
Vloo:
3.43
fps
CROSS SECTION CORRUGATED METAL PIPE CULVERT A -A
HIGH COUNTRY ENGINEERING, INC.
LEGACY HOMES
DRAWN BY:
SCALE:
GARFIELD COUNT, CO
HOE
N.T.S.
14INVERNESS DRIVE
LOT
CHECKED BY:
PROJECT NO:
(303)9,65" 1"(03) 92WOOD,C080112
PHONE f303)9250544 FAX (3031 9250547
A, BEULAH WILSON SUB.
HCE
2151074.00
1517 BLAKE AVENUE, STE 101, GLENWOOD SPRINGS, C081WI
HYDRAULIC
DATE:
PAGE:
PHONE (970) 94SB6
W8'n' CE FAX W70)9452555
plpE CAPACITY
2-516
EXHIBIT I
FILE:
J:/SOSKPROJ/213/ IM6'0wG/OPAINAGE/PIPECAPACII .OWG
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8 _ LOT A. BEULAH WILSON SUB. ”" euervc wwnn.ue.vw ssasss '" �v rb