Table 500-109
Natural Resource Protection Standards
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---|---|---|---|---|---|---|---|
Natural Resource Feature
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Zoning District Type
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Agricultural
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Residential (c)
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Nonresidential (d)
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Protection Standard
|
Mitigation Permitted
|
Protection Standard
|
Mitigation Permitted
|
Protection Standard
|
Mitigation Permitted
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Steep slopes:
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10% to 19%
|
0%
|
N/A
|
0%
|
No
|
0%
|
No
| |
20% to 30%
|
0%
|
No
|
0%
|
No
|
0%
|
No
| |
>30%
|
0%
|
No
|
0%
|
No
|
0%
|
No
| |
Woodlands and forests (a):
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Mature
|
0%
|
No
|
70%
|
Yes
|
70%
|
Yes
| |
Young
|
0%
|
No
|
50%
|
Yes
|
50%
|
Yes
| |
Lakes and ponds
|
100%
|
No
|
100%
|
No
|
100%
|
No
| |
Streams
|
100%
|
No
|
100%
|
Yes
|
100%
|
Yes
| |
Shore buffers (a)
|
100% (a)
|
No
|
100% (a)
|
No
|
100% (a)
|
No
| |
Floodplains/floodlands (b)
|
100%
|
No
|
100%
|
No
|
100%
|
Yes
| |
Drainageways
|
100%
|
No
|
30%
|
Yes
|
30%
|
Yes
| |
Wetlands and shoreland wetlands (a)
|
100%
|
No
|
100%
|
No
|
100%
|
Yes
|
NOTES:
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(a)
|
As regulated by Chapter 23, Shoreland, Wetland and Floodplain Zoning, of the Washington County Code, as amended.
|
(b)
|
As regulated by Chapter 23, Shoreland, Wetland and Floodplain Zoning, of the Washington County Code, as amended.
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(c)
|
Including residential Planned Unit Development Districts
(or residential portions thereof).
|
(d)
|
Including nonresidential Planned Unit Development Districts
(or nonresidential portions thereof).
|
N/A = Not applicable.
|
15 canopy trees, minimum 3.5-inch caliper*
| |
12 canopy trees, minimum 2-inch caliper
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250 canopy trees, minimum 4-foot-high whips
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50 understory trees, minimum 5-foot-high whips
| |
25 shrubs, minimum 12 inches high
|
*NOTE: Each 3.5-inch-caliper canopy tree may be substituted
with two 1.5-inch-caliper canopy trees.
|
12 canopy trees, minimum 3.5-inch caliper*
| |
10 canopy trees, minimum 2-inch caliper
| |
200 canopy trees, minimum 4-foot-high whips
| |
40 understory trees, minimum 5-foot-high whips
| |
20 shrubs, minimum 12 inches high
|
*NOTE: Each 3.5-inch-caliper canopy tree may be substituted
with two 1.5-inch-caliper canopy trees.
|
Table 500-111
Tree Species for Woodland and Forest Mitigation
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---|---|---|
Species
Common Name
|
Species
Scientific Name
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Sugar maple
|
Acer saccharum
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Bitternut hickory
|
Carya cordiformis
| |
Hackberry (sugarberry)
|
Celtis accidentalis
| |
Butternut
|
Juglans cinerea
| |
Black walnut
|
Juglans nigra
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Eastern hophornbeam
|
Ostrya virginiana
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Black cherry
|
Prunus serotina
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White oak
|
Quercus alba
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Red oak
|
Quercus borealis
| |
American basswood
|
Tilia americana
| |
American elm
|
Ulmus americana
| |
Slippery elm
|
Ulmus rubra
|