Landscape Modifications
Modification Costs
*per square meter unless noted
- New tree canopy: $0.40
- New surface sinks: $30
- Converting parking lots and streets to permeable pavement: $100
- Green roofs: $500
- Underground storage: $2600 per cubic meter
Types of Modifications
Canopy

Permeable Pavement

Rain Gardens

Green Roofs

Underground Storage

Getting Crazy

Modification Breakdown
| Sewer Grate ID |
Sewer Grate Type |
Runoff, as is, 1/4" storm (m3) |
Runoff, as is, 1" storm (m3) |
Runoff, as is, 2" storm (m3) |
Runoff, as is, 4" storm (m3) |
Runoff, mods, 1/4" storm (m3) |
Runoff, mods, 1" storm (m3) |
Runoff, mods, 2" storm (m3) |
Runoff, mods, 4" storm (m3) |
| 1 |
G |
147.43 |
754.26 |
1635.31 |
3397.41 |
-2.81 |
-4.48 |
1.23 |
-3.82 |
| 2 |
G |
119.09 |
656.12 |
1432.47 |
2985.17 |
-2.60 |
-0.07 |
-2.80 |
0.63 |
| 3 |
G |
195.26 |
977.10 |
2090.40 |
5768.11 |
-0.86 |
1.80 |
-2.48 |
-2.95 |
| 4 |
G |
155.04 |
768.33 |
1774.22 |
3786.01 |
-3.14 |
-4.15 |
2.08 |
-5.29 |
| 5 |
G |
158.32 |
922.29 |
2150.15 |
4686.17 |
-3.15 |
-3.81 |
6.26 |
-1.24 |
| 6 |
G |
74.32 |
325.42 |
735.53 |
1555.75 |
-0.91 |
-0.25 |
1.86 |
-3.11 |
| 7 |
G |
37.16 |
216.42 |
511.23 |
1100.87 |
-1.17 |
-1.23 |
1.25 |
7.32 |
| 8 |
G |
41.85 |
185.01 |
425.82 |
907.46 |
0.00 |
0.32 |
-0.85 |
2.43 |
| 9 |
G |
100.32 |
606.15 |
1413.47 |
3297.80 |
-1.62 |
-1.34 |
-2.49 |
-0.31 |
| 10 |
NS |
|
|
|
|
77.20 |
|
|
|
| 11 |
NS |
|
|
|
|
48.50 |
|
|
|
| 12 |
NS |
|
|
|
|
53.01 |
|
|
|
| 13 |
NS |
|
|
|
|
56.09 |
|
|
|
| 14 |
NS |
|
|
|
|
38.93 |
|
|
|
| 15 |
NS |
|
|
|
|
21.75 |
|
|
|
| 16 |
NS |
|
|
|
|
32.12 |
|
|
|
| 17 |
NS |
|
|
|
|
6.78 |
|
|
|
| 18 |
NS |
|
|
|
|
18.16 |
|
|
|
| 19 |
NS |
|
|
|
|
41.22 |
|
|
|
| 20 |
NS |
|
|
|
|
|
375.2 |
|
|
| 21 |
NS |
|
|
|
|
|
31.15 |
|
|
| 22 |
NS |
|
|
|
|
|
82.83 |
|
|
| 23 |
NS |
|
|
|
|
|
100.38 |
|
|
| 24 |
NS |
|
|
|
|
|
110.49 |
|
|
| 25 |
NS |
|
|
|
|
|
213.25 |
|
|
| 26 |
NS |
|
|
|
|
|
24.35 |
|
|
| 27 |
NS |
|
|
|
|
|
39.44 |
|
|
| 28 |
NS |
|
|
|
|
|
221.28 |
|
|
| 29 |
NS |
|
|
|
|
|
171.72 |
|
|
| 30 |
NS |
|
|
|
|
|
195.34 |
|
|
| 31 |
NS |
|
|
|
|
|
459.63 |
|
|
| 32 |
NS |
|
|
|
|
|
11.32 |
|
|
| 33 |
NS |
|
|
|
|
|
145.83 |
|
|
| 34 |
NS |
|
|
|
|
|
105.37 |
|
|
| 35 |
NS |
|
|
|
|
|
91.18 |
|
|
| 36 |
NS |
|
|
|
|
|
172.06 |
|
|
| 37 |
NS |
|
|
|
|
|
133.98 |
|
|
| 38 |
NS |
|
|
|
|
|
|
275.44 |
|
| 39 |
NS |
|
|
|
|
|
|
166.97 |
|
| 40 |
NS |
|
|
|
|
|
|
17.86 |
|
| 41 |
NS |
|
|
|
|
|
|
123.29 |
|
| 42 |
NS |
|
|
|
|
|
|
129.03 |
|
| 43 |
NS |
|
|
|
|
|
|
351.87 |
|
| 44 |
NS |
|
|
|
|
|
|
38.47 |
|
| 45 |
NS |
|
|
|
|
|
|
542.94 |
|
| 46 |
NS |
|
|
|
|
|
|
202.12 |
|
| 47 |
NS |
|
|
|
|
|
|
542.25 |
|
| 48 |
NS |
|
|
|
|
|
|
77.75 |
|
| 49 |
NS |
|
|
|
|
|
|
41.59 |
|
| 50 |
NS |
|
|
|
|
|
|
798.36 |
|
| 51 |
NS |
|
|
|
|
|
|
13.49 |
|
| 52 |
NS |
|
|
|
|
|
|
266.92 |
|
| 53 |
NS |
|
|
|
|
|
|
194.87 |
|
| 54 |
NS |
|
|
|
|
|
|
12.86 |
|
| 55 |
NS |
|
|
|
|
|
|
40.48 |
|
| 56 |
NS |
|
|
|
|
|
|
107.71 |
|
| 57 |
NS |
|
|
|
|
|
|
440.52 |
|
| 58 |
NS |
|
|
|
|
|
|
98.37 |
|
| 59 |
NS |
|
|
|
|
|
|
|
81.49 |
| 60 |
NS |
|
|
|
|
|
|
|
308.56 |
| 61 |
NS |
|
|
|
|
|
|
|
77.99 |
| 62 |
NS |
|
|
|
|
|
|
|
710.06 |
| 63 |
NS |
|
|
|
|
|
|
|
82.33 |
| 64 |
NS |
|
|
|
|
|
|
|
173.33 |
| 65 |
NS |
|
|
|
|
|
|
|
71.16 |
| 66 |
NS |
|
|
|
|
|
|
|
238.83 |
| 67 |
NS |
|
|
|
|
|
|
|
28.17 |
| 68 |
NS |
|
|
|
|
|
|
|
147.84 |
| 69 |
NS |
|
|
|
|
|
|
|
291.19 |
| 70 |
NS |
|
|
|
|
|
|
|
207.31 |
| 71 |
NS |
|
|
|
|
|
|
|
84.38 |
| 72 |
NS |
|
|
|
|
|
|
|
379.87 |
| 73 |
NS |
|
|
|
|
|
|
|
111.12 |
| 74 |
NS |
|
|
|
|
|
|
|
24.80 |
| 75 |
NS |
|
|
|
|
|
|
|
35.65 |
| 76 |
NS |
|
|
|
|
|
|
|
510.38 |
| 77 |
NS |
|
|
|
|
|
|
|
64.62 |
| 78 |
NS |
|
|
|
|
|
|
|
169.39 |
| 79 |
NS |
|
|
|
|
|
|
|
297.36 |
| 80 |
NS |
|
|
|
|
|
|
|
373.82 |
| 81 |
NS |
|
|
|
|
|
|
|
80.92 |
| 82 |
NS |
|
|
|
|
|
|
|
30.74 |
| 83 |
NS |
|
|
|
|
|
|
|
162.90 |
| 84 |
NS |
|
|
|
|
|
|
|
539.97 |
| 85 |
NS |
|
|
|
|
|
|
|
373.54 |
| 86 |
NS |
|
|
|
|
|
|
|
28.66 |
| 87 |
NS |
|
|
|
|
|
|
|
27.68 |
| 88 |
NS |
|
|
|
|
|
|
|
213.36 |
| 89 |
NS |
|
|
|
|
|
|
|
194.63 |
| 90 |
NS |
|
|
|
|
|
|
|
345.29 |
| 91 |
NS |
|
|
|
|
|
|
|
932.29 |
| 92 |
NS |
|
|
|
|
|
|
|
6.27 |
| 93 |
NS |
|
|
|
|
|
|
|
212.35 |
| 94 |
NS |
|
|
|
|
|
|
|
97 |
| 95 |
NS |
|
|
|
|
|
|
|
97.02 |
| 96 |
NS |
|
|
|
|
|
|
|
33.55 |
| 97 |
NS |
|
|
|
|
|
|
|
322.56 |
| 98 |
NS |
|
|
|
|
|
|
|
314.38 |
| 99 |
NS |
|
|
|
|
|
|
|
74.67 |
| 100 |
NS |
|
|
|
|
|
|
|
133.16 |
| 101 |
NS |
|
|
|
|
|
|
|
185.74 |
| 102 |
NS |
|
|
|
|
|
|
|
514.99 |
| 103 |
NS |
|
|
|
|
|
|
|
96.49 |
| 104 |
NS |
|
|
|
|
|
|
|
86.26 |
| 105 |
NS |
|
|
|
|
|
|
|
16.72 |
| 106 |
NS |
|
|
|
|
|
|
|
4.74 |
| 107 |
NS |
|
|
|
|
|
|
|
125.77 |
| 108 |
NS |
|
|
|
|
|
|
|
398.54 |
| Total |
|
|
|
|
|
393.76 |
2,684.8 |
4,483.16 |
10,119.84 |