100 LakeBMP Lane
APN: 123-456-789
VEG
BMP #6
BMP #4
x
x
12'
Drive C
AND MULCH WILL PROVIDE
ADEQUATE TREATMENT
LANDSCAPING
BMP #7
DECK ARMOR, COMBINED
WITH SURROUNDING VEGETATION
w/SEDIMENT TRAP
BMP #3
N
27'
23'
A
BMP #6
18'
x
#5
EXISTING
TIMBER WALL
BMP #9
BMP #8
BMP #6
NATURAL VEGETATION
TO REMAIN
NATURAL VEGETATION TO REMAIN
50'
B
12'
Drive D
BMP #6
40'
BMP #1A
over 400 sq. ft.
BMP Calculation Spreadsheet
Estimated Soil Erosion Savings of 16.5 pounds per year by doing your BMPs.
Soil erosion is estimated by the treatement volume multiplied by a 250 mg/l concentration plus contributions of
source control and deck treatments calculated with the USLE.
Property Address:
RDLane
Property Address: 715
100 AGATE
LakeBMP
MAP DATA
123-456-789
APN: 116-040-001
APN lookup
Date: 5/1/15
Designed By: Contractor 2
Contributing Surface
# of Stories
Length (ft.)
Width (ft.)
Area (ft2)
A
2
50
18
Water Table:
>5ft
Restriction:
Bedrock (lithic) at 71in.
Max. Depth of Install:
B
2
27
18
Drive C
0
10
12
0
0.0
5.7
4.3
5.7
2.8
5.7
Effective Volume (yd3)
Treatment Capacity (ft3)
Drain Rock Quantity (yd3)
0.0
48.7
0.0
0.0
40%
1.3
44.2
0.0
0.0
40%
0.6
10.1
2.4
26.3
0.0
0.0
0.0
0.0
1.3
0.0
3.7
0.0
0.0
0.0
0
0
0
0
Excess Runoff (ft3)
Excess Capacity (ft3)
36.0
24
6
Contributing Surface
# of Stories
Length (ft.)
Width (ft.)
Area (ft2)
Area (ft2)
Runoff (ft3)
Treatment Label:
Length (ft.)
Width (in.)
Depth (in.)
On-Site Ksat (in/hr)
mapped Ksat (in/hr)
Prefab Void Space (%)
Average Void Space (%)
Effective Volume (yd3)
Treatment Capacity (ft3)
Drain Rock Quantity (yd3)
0
0.0
120
10.0
#2
0
0.0
0
0.0
5.7
5.7
0.0
0.0
0.0
0.0
0.0
0.0
0
0
Excess Runoff (ft3)
Excess Capacity (ft3)
59 in.
Total Runoff (ft3) 139.5
Map Unit: 7221
T
o
t
a
l
0
0.0
0
0.0
0
0.0
0
0.0
0
0.0
4.3
5.7
2.8
5.7
4.3
5.7
5.7
0.0
0.0
40%
0.5
15.2
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.6
0.0
0.1
0.0
0.0
0.0
0.5
0.0
1.2
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0
0
0
0
0
0
0
0
0
0.0
0.0
0.0
0.0
0
0.0
0
0.0
0
0.0
5.7
5.7
5.7
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0
0
0
0.0
0.0
0.0
0.0
0.0
0.0
0
0.0
0
0.0
5.7
5.7
0.0
0.0
0.0
0.0
0.0
0.0
0
0
0.0
0.0
0.0
0.0
0.0
0
0.0
0
0.0
0
0.0
5.7
5.7
5.7
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0
0
0
0.0
0.0
0.0
0.0
T
o
t
a
l
0.0
0.0
0.0
0.0
0.0
0
0.0
0
0.0
0
0.0
0
0.0
5.7
5.7
5.7
5.7
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0
0
0
0
0.0
0.0
0.0
0.0
0.0
Notes
2:1 (rock lined or vegetated)
5:1 (mowable)
Contributing Surface
Length (ft.)
Width (ft.)
Area (ft2)
Bottom Width (ft.)
Volume (yd3)
T
o
t
a
l
T
o
t
a
l
Basin
Area (ft2)
Runoff (ft3)
Treatment Label:
Top Length (ft.)
Top Width (ft.)
Depth (in.)
Bottom Length (ft.)
2.4
14.0
18
8
T
o
t
a
l
0.0
4.9
Amount Treated 113.2
Total Excavation (yd3)
0
0.0
4.0
36
16
168
14.0
#5
T
o
t
a
l
0
0.0
Total Drain Rock Quantity (yd3)
Drive D
0
14
12
Area (ft2) 900
Runoff (ft3) 75.0
Treatment Label: Deck
Length (ft.) 52.0
Width (in.)
60
Depth (in.)
0
in
On-Site Ksat ( /hr)
mapped Ksat (in/hr) 5.7
Prefab Void Space (%)
Average Void Space (%) 40%
486
40.5
#1
ON-SITE DEPTHS
0
0
0
0
0
0
0
0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
5.7
0.0
5.7
0.0
5.7
0.0
5.7
0.0
5.7
0.0
5.7
0.0
5.7
0.0
5.7
0.0
0.0
0.0
0
0.0
0.0
0
0.0
0.0
0
0.0
0.0
0
0.0
0.0
0
0.0
0.0
0
0.0
0.0
0
0.0
0.0
0
Contributing area A is the back (S) drip line that discharges to the elevated
deck. The gravel armor under the deck and surrounding area to be mulched
and vegetated will provide sufficient treatment for run-off. Gravel for all
trenches and armor will utilize 3/4" to 1 1/2" angular washed stone.
Contributing area B is the front roof that is capured by a gutter. The
drainage area is split and discharges to separate gutter downspouts. On
the W side, the gutter discharges to a gravel infiltration trench, on the E side
to a vegetated planter. The planter is larger than the infiltration trench,
recieves a smaller discharge of stormwater, and is seasonally planted with
flowers and native species.
On-Site Ksat
Mapped Ksat
Treatment Capacity (ft3)
Excess Runoff (ft3)
Excess Capacity (ft3)
Deck Treatments
Deck Label
Area (ft2)
Additional Treatment See
Area Label
Area (ft2)
Slope (%)
Slope Length (ft)
% Cover
% Canopy
Treatment
Drain Rock Quantity (yd3)
Drain Rock Quantity (yd3)
Slope (%)
Slope Length (ft)
Gravel Treatment Length (ft.)
Gravel Treatment Width (ft.)
Reviewer Comments
Source Control Treatments
Sheet:
of:
1
1
template 12/6/2011
This worksheet is intended to provide an estimate of proper dimensions of infiltration structures and represents no guarantee of the adequacy of overall system design.