HomeMy WebLinkAboutBUENO DRIVE CONDOS - PDP190004 - SUBMITTAL DOCUMENTS - ROUND 2 - DRAINAGE RELATED DOCUMENTDesign Point Basins Area (ac) %Imp C2
C100 Q
2 (cfs) Q100
(cfs)
1 E1 0.934 47.1% 0.52 0.65 1.08 4.86
2 E2 0.032 1.8% 0.14 0.17 0.01 0.04
Existing Condition Hydrology Summary Table
5724 Bueno Drive
Fort Collins, CO
7:55 AM
4/1/2019
Design Point Basins Area (ac) %Imp C2
C100 Q
2 (cfs) Q100
(cfs)
1 S1,S2 0.26 67.7% 0.76 0.94 0.56 2.45
2 S2 0.04 90.0% 0.95 1.00 0.12 0.43
3 S3 0.05 90.0% 0.95 1.00 0.14 0.53
4 S4 0.04 29.5% 0.37 0.47 0.04 0.18
5 S5 0.02 2.0% 0.15 0.19 0.01 0.03
6 S1,S2,S3,S4 0.40 66.8% 0.77 0.96 0.86 3.77
Site S1,S2,S3,S4,S5 0.41 64.0% 0.74 0.92
Proposed Condition Hydrology Summary Table
5724 Bueno Drive
Fort Collins, CO
2:49 PM
4/5/2019
Basin
No.
Total Area
(ft
2
)
Total
Area (ac.)
Paved Area
(ft
2
)
C = 0.95
100% IMP
Roof
(ft
2
)
C = 0.95
90% IMP
Recycled Asphalt
Area (ft
2
)
C = 0.80
80% IMP
Packed Gravel
Area (ft2)
C = 0.50
40% IMP
Pavers
Area (ft
2
)
C = 0.50
40% IMP
Lawns, Sandy Soil,
Flat Slope < 2%
Area (ft
2
)
C = 0.10
2% IMP
Lawns, Sandy Soil,
Avg Slope 2-7%
Area (ft
2
)
C = 0.15
2% IMP
Lawns, Sandy Soil,
Steep Slope >7%
Area (ft
2
)
C = 0.20
2% IMP
Lawns, Clayey Soil,
Flat Slope < 2%
Area (ft
Basin
No.
Total Area
(ft
2
)
Total
Area (ac.)
Paved Area
(ft
2
)
C = 0.95
100% IMP
Roof
(ft
2
)
C = 0.95
90% IMP
Recycled Asphalt
Area (ft
2
)
C = 0.80
80% IMP
Packed Gravel
Area (ft2)
C = 0.50
40% IMP
Pavers
Area (ft
2
)
C = 0.50
40% IMP
Lawns, Sandy Soil,
Flat Slope < 2%
Area (ft
2
)
C = 0.10
2% IMP
Lawns, Sandy Soil,
Avg Slope 2-7%
Area (ft
2
)
C = 0.15
2% IMP
Lawns, Sandy Soil,
Steep Slope >7%
Area (ft
2
)
C = 0.20
2% IMP
Lawns, Clayey Soil,
Flat Slope < 2%
Area (ft
Channel
Flow
Pipe
Flow Notes
Design Basins Area C Cf (2yr) C
f (100yr) C2
C100 Length Slope t
i (2yr) ti
(100yr) Length Slope Velocity tL
tL tL Computed T
c Max Tc
Final Tc Computed T
c Max Tc
Final Tc i
2 i100
Q2 Q
100 Minor Major
Point (ac) (ft) (%) (min) (min) (ft) (ft/ft) (ft/s) (min) (min) (min) (min) (min) (min) (min) (min) (min) in/hr in/hr (cfs) (cfs) (cfs) (cfs)
1 E1 0.93 0.52 1.0 1.25 0.52 0.65 145 1.7 10.9 8.4 0 0.000 0.0 0.0 0.8 0.0 11.7 10.1 10.1 9.2 10.1 9.2 2.20 7.96 1.08 4.86
2 E2 0.03 0.14 1.0 1.25 0.14 0.17 109 2.8 13.4 12.9 0 0.000 0.0 0.0 0.0 0.0 13.4 10.1 10.1 12.9 10.1 10.1 2.20 7.70 0.01 0.04
Design Lt Slope Rt Slope BaseWidth Slope "n" Flowdepth Length Velocity tL Lt Slope Rt Slope BaseWidth Slope "n" Flowdepth Length Velocity t
L Dia "n" Slope Length Velocity
Point (ft/ft) (ft/ft) (ft) (ft/ft) (ft) (ft) (ft/s) (min) (ft/ft) (ft/ft) (ft) (ft/ft) (ft) (ft) (ft/s) (min) (ft) (ft/ft) (ft) (ft/s)
1 10.0 10.0 0.0 0.044 0.035 0.5 174 3.53 0.8 n/a n/a n/a n/a n/a n/a n/a 0.00 0.00 n/a n/a n/a n/a 0.0
2 n/a n/a n/a n/a n/a n/a n/a 0.00 0.00 n/a n/a n/a n/a n/a n/a n/a 0.00 0.00 n/a n/a n/a n/a 0.0
Pan Pipe
Fort Collins, CO
Rational Method
Existing Conditions
5724 Bueno Drive
Sub-Basin Data Initial Overland Time Gutter Flow Tc 2yr T
c 100yr Intensity Runoff Street Capacity
Travel Time Parameters
Swale
8:00 AM
4/1/2019
Initial Overland Time
Channel
Flow
Pipe
Flow Notes
Design Basins Area C* Cf (2yr) C
f (100yr) C2
C100 % Imp Length Slope t
i (2yr) ti
(100yr) Length Slope Velocity tL
tL tL Computed T
c Max Tc
Final Tc Computed T
c Max Tc
Final Tc i
2 i100
Q2 Q
100 Minor Major
Point (ac) (ft) (%) (min) (min) (ft) (ft/ft) (ft/s) (min) (min) (min) (min) (min) (min) (min) (min) (min) in/hr in/hr (cfs) (cfs) (cfs) (cfs)
1 S1,S2 0.26 0.76 1.0 1.25 0.76 0.94 67.7% 47.9 3.6 2.9 1.3 0 0.000 0.0 0.0 1.1 0.0 4.1 10.0 5.0 2.5 10.0 5.0 2.85 9.95 0.56 2.45
2 S2 0.04 0.95 1.0 1.25 0.95 1.00 90.0% 22.4 8.0 0.7 0.4 0 0.000 0.0 0.0 0.0 0.0 0.7 10.0 5.0 0.4 10.0 5.0 2.85 9.95 0.12 0.43
3 S3 0.05 0.95 1.0 1.25 0.95 1.00 90.0% 23.3 8.0 0.7 0.5 0 0.000 0.0 0.0 0.0 0.0 0.7 10.0 5.0 0.5 10.0 5.0 2.85 9.95 0.14 0.53
4 S4 0.04 0.37 1.0 1.25 0.37 0.47 29.5% 16.3 17.9 2.1 1.8 0 0.000 0.0 0.0 1.2 0.0 3.3 10.0 5.0 3.0 10.0 5.0 2.85 9.95 0.04 0.18
5 S5 0.02 0.15 1.0 1.25 0.15 0.19 2.0% 11 22.1 2.1 2.0 0 0.000 0.0 0.0 0.0 0.0 2.1 10.0 5.0 2.0 10.0 5.0 2.85 9.95 0.01 0.03
6 S1,S2,S3,S4 0.40 0.77 1.0 1.25 0.77 0.96 66.8% 47.9 3.6 2.9 1.3 0 0.000 0.0 0.0 1.4 0.3 4.6 10.0 5.0 3.0 10.0 5.0 2.85 9.95 0.86 3.77
* Weighted-area average method used to calculate composite C for design points that have multiple tributary basins.
Design Lt Slope Rt Slope BaseWidth Slope "n" Flowdepth Length Velocity tL Lt Slope Rt Slope BaseWidth Slope "n" Flowdepth Length Velocity t
L Dia "n" Slope Length Velocity
Point (ft/ft) (ft/ft) (ft) (ft/ft) (ft) (ft) (ft/s) (min) (ft/ft) (ft/ft) (ft) (ft/ft) (ft) (ft) (ft/s) (min) (ft) (ft/ft) (ft) (ft/s)
1 10.0 10.0 0.0 0.015 0.035 0.5 83 2.06 0.68 8.0 8.0 0.0 0.014 0.013 0.13 58 2.08 0.46 n/a n/a n/a n/a 0.0
2 n/a n/a n/a n/a n/a n/a n/a 0.00 0.00 n/a n/a n/a n/a n/a n/a n/a 0.00 0.00 n/a n/a n/a n/a 0.0
3 n/a n/a n/a n/a n/a n/a n/a 0.00 0.00 n/a n/a n/a n/a n/a n/a n/a 0.00 0.00 n/a n/a n/a n/a 0.0
4 n/a n/a n/a n/a n/a n/a n/a 0.00 0.00 8.0 8.0 0.0 0.005 0.013 0.13 86 1.24 1.16 n/a n/a n/a n/a 0.0
5 n/a n/a n/a n/a n/a n/a n/a 0.00 0.00 n/a n/a n/a n/a n/a n/a n/a 0.00 0.00 n/a n/a n/a n/a 0.0
6 n/a n/a n/a n/a n/a n/a n/a 0.00 0.00 8.0 8.0 0.0 0.005 0.013 0.13 104 1.24 1.40 0.33 0.013 0.005 25.5 1.5
Travel Time Parameters
Tc 2yr Intensity Runoff
Swale Pan Pipe
Rational Method
Proposed Conditions
5724 Bueno Drive
Sub-Basin Data Gutter Flow Tc 100yr Street Capacity
Fort Collins, CO
1:11 PM
4/2/2019
Sheet 1 of 2
Designer:
Company:
Date:
Project:
Location:
1. Basin Storage Volume
A) Effective Imperviousness of Tributary Area, Ia Ia = 67.7 %
(100% if all paved and roofed areas upstream of sand filter)
B) Tributary Area's Imperviousness Ratio (i = Ia/100) i = 0.677
C) Water Quality Capture Volume (WQCV) Based on 12-hour Drain Time WQCV = 0.21 watershed inches
WQCV= 0.8 * (0.91* i3 - 1.19 * i2 + 0.78 * i)
D) Contributing Watershed Area (including sand filter area) Area = 11,343 sq ft
E) Water Quality Capture Volume (WQCV) Design Volume VWQCV = 200 cu ft
VWQCV = WQCV / 12 * Area
F) For Watersheds Outside of the Denver Region, Depth of d6 = in
Average Runoff Producing Storm
G) For Watersheds Outside of the Denver Region, VWQCV OTHER = cu ft
Water Quality Capture Volume (WQCV) Design Volume
H) User Input of Water Quality Capture Volume (WQCV) Design Volume VWQCV USER = cu ft
(Only if a different WQCV Design Volume is desired)
2. Basin Geometry
A) WQCV Depth DWQCV = 0.50 ft
B) Sand Filter Side Slopes (Horizontal distance per unit vertical, Z = 4.00 ft / ft
4:1 or flatter preferred). Use "0" if sand filter has vertical walls.
C) Minimum Filter Area (Flat Surface Area) AMin = 96 sq ft
D) Actual Filter Area AActual = sq ft
E) Volume Provided VT = cu ft
3. Filter Material
4. Underdrain System
A) Are underdrains provided? 1
B) Underdrain system orifice diameter for 12 hour drain time
i) Distance From Lowest Elevation of the Storage y = 1.0 ft
Volume to the Center of the Orifice
ii) Volume to Drain in 12 Hours Vol12 = 200 cu ft
iii) Orifice Diameter, 3/8" Minimum DO = 3/8 in
Design Procedure Form: Sand Filter (SF)
April 6, 2019
UD-BMP (Version 3.07, March 2018)
Choose One
Choose One
18" CDOT Class B or C Filter Material
Other (Explain):
YES
NO
UD-BMP_v3.07.xlsm, SF 4/6/2019, 8:35 AM
Sheet 2 of 2
Designer:
Company:
Date:
Project:
Location:
5. Impermeable Geomembrane Liner and Geotextile Separator Fabric
A) Is an impermeable liner provided due to proximity
of structures or groundwater contamination?
6. Inlet / Outlet Works
A) Describe the type of energy dissipation at inlet points and means of
conveying flows in excess of the WQCV through the outlet
Notes:
Design Procedure Form: Sand Filter (SF)
April 6, 2019
Choose One
YES NO
UD-BMP_v3.07.xlsm, SF 4/6/2019, 8:35 AM
Sheet 1 of 2
Designer:
Company:
Date:
Project:
Location:
1. Basin Storage Volume
A) Effective Imperviousness of Tributary Area, Ia Ia = 67.7 %
(100% if all paved and roofed areas upstream of rain garden)
B) Tributary Area's Imperviousness Ratio (i = Ia/100) i = 0.677
C) Water Quality Capture Volume (WQCV) for a 12-hour Drain Time WQCV = 0.21 watershed inches
(WQCV= 0.8 * (0.91* i3 - 1.19 * i2 + 0.78 * i)
D) Contributing Watershed Area (including rain garden area) Area = 11,343 sq ft
E) Water Quality Capture Volume (WQCV) Design Volume VWQCV = 200 cu ft
Vol = (WQCV / 12) * Area
F) For Watersheds Outside of the Denver Region, Depth of d6 = in
Average Runoff Producing Storm
G) For Watersheds Outside of the Denver Region, VWQCV OTHER = cu ft
Water Quality Capture Volume (WQCV) Design Volume
H) User Input of Water Quality Capture Volume (WQCV) Design Volume VWQCV USER = cu ft
(Only if a different WQCV Design Volume is desired)
2. Basin Geometry
A) WQCV Depth (12-inch maximum) DWQCV = 1in
B) Rain Garden Side Slopes (Z = 4 min., horiz. dist per unit vertical) Z = 4.00 ft / ft
(Use "0" if rain garden has vertical walls)
C) Mimimum Flat Surface Area AMin = 154 sq ft
D) Actual Flat Surface Area AActual = sq ft
E) Area at Design Depth (Top Surface Area) ATop = sq ft
F) Rain Garden Total Volume VT= cu ft
(VT= ((ATop + AActual) / 2) * Depth)
3. Growing Media
4. Underdrain System
A) Are underdrains provided? 1
B) Underdrain system orifice diameter for 12 hour drain time
i) Distance From Lowest Elevation of the Storage y = 1.0 ft
Volume to the Center of the Orifice
ii) Volume to Drain in 12 Hours Vol12 = 200 cu ft
iii) Orifice Diameter, 3/8" Minimum DO = 3/8 in
Design Procedure Form: Rain Garden (RG)
April 4, 2019
UD-BMP (Version 3.07, March 2018)
Choose One
Choose One
18" Rain Garden Growing Media
Other (Explain):
YES
NO
UD-BMP_v3.07.xlsm, RG 4/4/2019, 8:41 AM
Sheet 2 of 2
Designer:
Company:
Date:
Project:
Location:
5. Impermeable Geomembrane Liner and Geotextile Separator Fabric
A) Is an impermeable liner provided due to proximity
of structures or groundwater contamination?
6. Inlet / Outlet Control
A) Inlet Control
7. Vegetation
8. Irrigation
A) Will the rain garden be irrigated?
Notes:
Design Procedure Form: Rain Garden (RG)
April 4, 2019
Choose One
Choose One
Choose One
Sheet Flow- No Energy Dissipation Required
Concentrated Flow- Energy Dissipation Provided
Plantings
Seed (Plan for frequent weed control)
Sand Grown or Other High Infiltration Sod
Choose One
YES
NO
YES
NO
UD-BMP_v3.07.xlsm, RG 4/4/2019, 8:41 AM
Hydrologic Soil Group—Larimer County Area, Colorado
(xx)
Natural Resources
Conservation Service
Web Soil Survey
National Cooperative Soil Survey
3/29/2019
Page 1 of 4
4484071 4484078 4484085 4484092 4484099 4484106
4484071 4484078 4484085 4484092 4484099 4484106
493595 493602 493609 493616 493623 493630 493637 493644 493651 493658
493595 493602 493609 493616 493623 493630 493637 493644 493651 493658
40° 30' 27'' N
105° 4' 32'' W
40° 30' 27'' N
105° 4' 29'' W
40° 30' 26'' N
105° 4' 32'' W
40° 30' 26'' N
105° 4' 29'' W
N
Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 13N WGS84
0 10 20 40 60
Feet
0 4 8 16 24
Meters
Map Scale: 1:301 if printed on A landscape (11" x 8.5") sheet.
Soil Map may not be valid at this scale.
MAP LEGEND MAP INFORMATION
Area of Interest (AOI)
Area of Interest (AOI)
Soils
Soil Rating Polygons
A
A/D
B
B/D
C
C/D
D
Not rated or not available
Soil Rating Lines
A
A/D
B
B/D
C
C/D
D
Not rated or not available
Soil Rating Points
A
A/D
B
B/D
C
C/D
D
Not rated or not available
Water Features
Streams and Canals
Transportation
Rails
Interstate Highways
US Routes
Major Roads
Local Roads
Background
Aerial Photography
The soil surveys that comprise your AOI were mapped at
1:24,000.
Warning: Soil Map may not be valid at this scale.
Enlargement of maps beyond the scale of mapping can cause
misunderstanding of the detail of mapping and accuracy of soil
line placement. The maps do not show the small areas of
contrasting soils that could have been shown at a more detailed
scale.
Please rely on the bar scale on each map sheet for map
measurements.
Source of Map: Natural Resources Conservation Service
Web Soil Survey URL:
Coordinate System: Web Mercator (EPSG:3857)
Maps from the Web Soil Survey are based on the Web Mercator
projection, which preserves direction and shape but distorts
distance and area. A projection that preserves area, such as the
Albers equal-area conic projection, should be used if more
accurate calculations of distance or area are required.
This product is generated from the USDA-NRCS certified data as
Hydrologic Soil Group
Map unit symbol Map unit name Rating Acres in AOI Percent of AOI
54 Kim loam, 3 to 5 percent
slopes
B 0.0 0.9%
55 Kim loam, 5 to 9 percent
slopes
B 0.4 99.1%
Totals for Area of Interest 0.4 100.0%
Description
Hydrologic soil groups are based on estimates of runoff potential. Soils are
assigned to one of four groups according to the rate of water infiltration when the
soils are not protected by vegetation, are thoroughly wet, and receive
precipitation from long-duration storms.
The soils in the United States are assigned to four groups (A, B, C, and D) and
three dual classes (A/D, B/D, and C/D). The groups are defined as follows:
Group A. Soils having a high infiltration rate (low runoff potential) when
thoroughly wet. These consist mainly of deep, well drained to excessively
drained sands or gravelly sands. These soils have a high rate of water
transmission.
Group B. Soils having a moderate infiltration rate when thoroughly wet. These
consist chiefly of moderately deep or deep, moderately well drained or well
drained soils that have moderately fine texture to moderately coarse texture.
These soils have a moderate rate of water transmission.
Group C. Soils having a slow infiltration rate when thoroughly wet. These consist
chiefly of soils having a layer that impedes the downward movement of water or
soils of moderately fine texture or fine texture. These soils have a slow rate of
water transmission.
Group D. Soils having a very slow infiltration rate (high runoff potential) when
thoroughly wet. These consist chiefly of clays that have a high shrink-swell
potential, soils that have a high water table, soils that have a claypan or clay
layer at or near the surface, and soils that are shallow over nearly impervious
material. These soils have a very slow rate of water transmission.
If a soil is assigned to a dual hydrologic group (A/D, B/D, or C/D), the first letter is
for drained areas and the second is for undrained areas. Only the soils that in
their natural condition are in group D are assigned to dual classes.
Rating Options
Aggregation Method: Dominant Condition
Hydrologic Soil Group—Larimer County Area, Colorado xx
Natural Resources
Conservation Service
Web Soil Survey
National Cooperative Soil Survey
3/29/2019
Page 3 of 4
Component Percent Cutoff: None Specified
Tie-break Rule: Higher
Hydrologic Soil Group—Larimer County Area, Colorado xx
Natural Resources
Conservation Service
Web Soil Survey
National Cooperative Soil Survey
3/29/2019
Page 4 of 4
of the version date(s) listed below.
Soil Survey Area: Larimer County Area, Colorado
Survey Area Data: Version 13, Sep 10, 2018
Soil map units are labeled (as space allows) for map scales
1:50,000 or larger.
Date(s) aerial images were photographed: Sep 20, 2015—Oct
21, 2017
The orthophoto or other base map on which the soil lines were
compiled and digitized probably differs from the background
imagery displayed on these maps. As a result, some minor
shifting of map unit boundaries may be evident.
Hydrologic Soil Group—Larimer County Area, Colorado
(xx)
Natural Resources
Conservation Service
Web Soil Survey
National Cooperative Soil Survey
3/29/2019
Page 2 of 4
2
)
C = 0.20
2% IMP
Lawns, Clayey Soil,
Avg Slope 2-7%
Area (ft
2
)
C = 0.25
2% IMP
Lawns, Clayey Soil,
Steep Slope >7%
Area (ft
2
)
C = 0.35
2% IMP Composite C Composite C100
Percent
Impervious (%)
Net Impervious
Area (ft2
)
Cummulative
Impervious Area (ft2
)
Cummulative Site
%IMP
S1 9,466 0.217 4,2161,81500007,06500000.720.90 63.3% 5,9915,99158%
S2 1,877 0.043 01,8770000000000.951.00 90.0% 1,6897,68075%
S3 2,325 0.053 02,3250000000000.951.00 90.0% 2,0939,77395%
S4 1,704 0.039 479000001,22500000.370.47 29.5% 50410,276100%
S5 785 0.018 00000078500000.150.192.0% 1610,292100%
Site 16,157 0.371 0.71 0.89 63.7% 10,292
Facility ID
Tributary
Basins
Total Tributary
Area (ft2)
Tributary Net
Impervious
Area (ft2)
Percentage of Site
Impervious Area
Treated
SF-1 S1, S2 11,343 7,680 75%
Runoff Coefficents and Site Percent Imperviousness Calculations
5724 Bueno Drive
Fort Collins, CO
Proposed Conditions
LID Tributary Area Credit
9:00 AM
4/6/2019
2
)
C = 0.20
2% IMP
Lawns, Clayey Soil,
Avg Slope 2-7%
Area (ft
2
)
C = 0.25
2% IMP
Lawns, Clayey Soil,
Steep Slope >7%
Area (ft
2
)
C = 0.35
2% IMP Composite C Composite C100
Percent
Impervious (%)
Net Impervious
Area (ft2)
Cummulative
Impervious Area (ft2)
Cummulative Site
%IMP
E1 40,693 0.934 16,915 2,041000021,73700000.520.65 47.1% 19,187 19,18799.9%
S2 1,400 0.032 0000001,26300000.140.171.8% 2519,212100%
Site 42,093 0.966 0.51 0.64 45.6% 19,212
Runoff Coefficents and Site Percent Imperviousness Calculations
5724 Bueno Drive
Fort Collins, CO
Existing Conditions
7:58 AM
4/1/2019