| BMP Family |
BMP |
Classification |
Notes |
| Temporary Construction Sediment Control |
Preconstruction planning |
Yes |
Focus on sequencing to avoid open soils during winter and on limited grading prior to freeze-up |
| Resource protection |
Yes |
Buffers reduce runoff by providing infiltration potential |
X |
| Runoff control |
Yes |
Stable drainageways and sediment basins assure erosion control and provide storage opportunities for spring meltwater |
X |
| Perimeter
control |
Yes |
These practices are especially effective during winter construction |
X |
| Slope stabilization |
Yes |
These must be installed prior to freeze-up to be effective; they must be checked often and maintained all winter |
X |
| Stabilized soil |
Marginal |
Seeding, blankets and sprayed stabilizers must all be in place and working before freeze-up; if necessary, blankets can be laid and held in place with sandbags or rock logs |
X |
| Inspection and maintenance |
Yes |
Essential for proper operation all winter |
X |
| Bioretention |
Rain garden |
Marginal |
By definition, these are growing season practices, but they do provide a sump area for storage and some infiltration during a melt |
| Depressed parking islands |
Yes |
These can provide needed storage during the cold season and for spring runoff events; vegetation will not be a factor during winter |
X |
| Filtration |
Media filter |
Yes-to marginal |
Surface systems need to be fully dry before freezeup for these to work properly; sub-grade systems can be very effective for meltwater treatment |
| Surface vegetative filter |
Marginal |
Vegetative filtering is reduced once vegetation dies back in the fall; some physical filtering will occur if vegetation density and depth are sufficient |
X |
| Combination filter |
Yes-to marginal |
See comments above |
X |
| Infiltration |
Trench |
Yes with caution |
Effective when designed, installed and maintained properly; caution applies to limitations on source area to avoid high concentrations of Cl and toxics |
| Basin |
Yes with caution |
See above comment |
X |
| Stormwater Ponds |
Forebay |
Yes |
Effective if designed with enough available volume to accommodate meltwater in the spring |
