Construction and Post Construction Site Soil Erosion, Sediment, Storm Water Runoff and Storm Water Quality Controls and Regulations
Table 1: Temporary Stabilization | |
Area Requiring Temporary Stabilization | Time Frame to Apply Erosion Controls |
Any disturbed areas within 50 feet of a stream but not at final grade. | Within 2 days of the most recent disturbance if that area will remain idle for more than 21 days. |
For all construction activities, any disturbed area, including soil stockpiles that will be dormant for more than 21 days but less than 1 year. | Within 7 days of the most recent disturbance within the area. |
Disturbed areas that will be idle over winter. | Prior to November 1. |
Table 2: Permanent Stabilization | |
Area Requiring Permanent Stabilization | Time Frame to Apply Erosion Controls |
Any area that will lie dormant for 1 year or more. | Within 2 days of the most recent disturbance. |
Any areas within 50 feet of any stream and at final grade. | Within 2 days of reaching final grade. |
Any area at final grade. | Within 7 days of reaching final grade within that area. |
Schedule 1295.05(i)(1) Maximum Drainage Area for Silt Fence | |
Maximum drainage area (in acres) to 100 linear feet of silt fence | Range of slope for a particular drainage area (in percent) |
0.5 | <2% |
0.25 | > 2% but < 20% |
0.125 | > 20% but < 50% |
24-Hour Critical Storm Runoff Rate |
24-Hour Critical Storm Runoff Rate | ||
If the percentage of increase in runoff volume is: | ||
Equal to or greater than | And less than | The critical storm runoff rate will be limited to: |
0 | 10 | 1 year |
10 | 20 | 2 years |
20 | 50 | 5 years |
50 | 100 | 10 years |
100 | 250 | 25 years |
250 | 500 | 50 years |
500 | — | 100 years |
Timeline for Corrective Action | |
Nature of Violation | Number of Days from Inspection to Correct Functioning of Control Practice |
Timeline for Corrective Action | |
Nature of Violation | Number of Days from Inspection to Correct Functioning of Control Practice |
Silt fence | Within 3 days |
Outlet control structure | Within 3 days |
Temporary or permanent stabilization within 50' of drainage channels | Within 3 days |
Stabilized construction entrance | Within 3 days |
Pumping sediment-laden discharge into drainage channel | Immediately upon notice |
Sediment settling pond | Within 10 days |
Any other control practice not addressed in this table | Within 3 days |
Fees for Full Erosion & Sediment Control Plans |
Fees for Full Erosion & Sediment Control Plans | ||
Subdivisions, Commercial, Industrial, Residential Subdivisions * | 10 acres or less | $490.00 |
More than 10 to and including 20 acres | $815.00 | |
More than 20 to and including 50 acres | $1,140.00 | |
More than 50 acres | $1,625.00 | |
Non-Residential Individual Development Site | Individual development 1 acre to and including 5 acres | $400.00 |
More than 5 acres | $750.00 | |
Multi-Family Development Site (Apartments, Condos, Townhouses) | 10 acres or less | $490.00 |
More than 10 to and including 20 acres | $815.00 | |
More than 20 to and including 50 acres | $1,140.00 | |
More than 50 acres | $1,625.00 | |
A Non-Residential lot within a Common Plan of Development | Any lot 1 acre or greater within a Common Plan of Development | $240.00 |
Multi-Family Development within a Common Plan of Development | Any lot 1 acre or greater within a Common Plan of Development | $240.00 |
General Non-Residential/ Grading for Recreational | Any project 1 acre or greater | $240.00 |
*Fees will be assessed with each phase of development. | ||
Fees for Abbreviated Erosion & Sediment Control Plans | ||
Single Lot ESC Evaluation | Lots 10 acres or less | $25.00 |
All New, Single-Family Residential Projects | Any project 1 acre or greater or part of a Common Plan of Development | $65.00 |
Any Residential Clearing | Any project 1 acre or greater | $65.00 |
Variance Fee | $125.00 | |
Post Construction Fee Schedule |
Post Construction Fee Schedule | ||
Single Lot Residential | Single Project | $65.00 |
Residential Development Property Under Construction | For first 5 acres | $65.00 |
For additional 20 acres or any part thereof | $220.00 | |
For the next 25 acres | $190.00 | |
For all acreage over 50 acres | $125.00 | |
Non-Residential Property Under Construction | For first 5 acres | $315.00 |
For all acreage over 5 acres (per acre) | $65.00 | |
SITE INSPECTIONS | ||
Site Inspections for Both Residential and Non-Residential | Sites 1 - 5 acres | $315.00 |
Sites 6 - 10 acres | $500.00 | |
Sites 11 - 20 acres | $875.00 | |
Sites 21 - 50 acres | $1,125.00 | |
Site larger than 50 acres | $1,500.00 | |
Non-Compliant Sites | Additional inspection fee per hour for each inspection required until the site meets compliance | $65.00 |
Table 4a - Extended Detention Post-Construction Practices with Minimum Drain Times | |
Extended Detention Practices | Minimum Drain Time of WQv |
Table 4a - Extended Detention Post-Construction Practices with Minimum Drain Times | |
Extended Detention Practices | Minimum Drain Time of WQv |
Wet extended detention basin
1, 2 | 24 hours |
Constructed extended detention wetland1, 2 | 24 hours |
Dry extended detention basin1, 3 | 48 hours |
Permeable pavement - extended detention1 | 24 hours |
Underground storage - extended detention1, 4 | 24 hours |
Sand & other media filtration extended detention1, 5 | 24 hours |
Notes: 1. The outlet structure shall not discharge more than the first half of the WQv in less than one-third of the drain time. 2. Provide a permanent pool with a minimum volume equal to the WQv and an extended detention volume above the permanent pool equal to 1.0 x WQv. 3. Dry basins must include a forebay and a micro pool each sized at a minimum of 0.1 x WQv and a protected outlet or include acceptable pretreatment and a protected outlet. 4. Underground storage must have pretreatment for removal of suspended sediments included in the design and documented in the SWP3. This pretreatment shall concentrate sediment in a location where it can be readily removed. For non-infiltrating, underground extended detention systems, pretreatment shall be 50% effective at capturing total suspended solids according to the testing protocol established in the Alternative Post Construction BMP Testing Protocol. 5. The WQv ponding area shall completely empty between 24 and 72 hours. | |
Construction and Post Construction Site Soil Erosion, Sediment, Storm Water Runoff and Storm Water Quality Controls and Regulations
Table 1: Temporary Stabilization | |
Area Requiring Temporary Stabilization | Time Frame to Apply Erosion Controls |
Any disturbed areas within 50 feet of a stream but not at final grade. | Within 2 days of the most recent disturbance if that area will remain idle for more than 21 days. |
For all construction activities, any disturbed area, including soil stockpiles that will be dormant for more than 21 days but less than 1 year. | Within 7 days of the most recent disturbance within the area. |
Disturbed areas that will be idle over winter. | Prior to November 1. |
Table 2: Permanent Stabilization | |
Area Requiring Permanent Stabilization | Time Frame to Apply Erosion Controls |
Any area that will lie dormant for 1 year or more. | Within 2 days of the most recent disturbance. |
Any areas within 50 feet of any stream and at final grade. | Within 2 days of reaching final grade. |
Any area at final grade. | Within 7 days of reaching final grade within that area. |
Schedule 1295.05(i)(1) Maximum Drainage Area for Silt Fence | |
Maximum drainage area (in acres) to 100 linear feet of silt fence | Range of slope for a particular drainage area (in percent) |
0.5 | <2% |
0.25 | > 2% but < 20% |
0.125 | > 20% but < 50% |
24-Hour Critical Storm Runoff Rate |
24-Hour Critical Storm Runoff Rate | ||
If the percentage of increase in runoff volume is: | ||
Equal to or greater than | And less than | The critical storm runoff rate will be limited to: |
0 | 10 | 1 year |
10 | 20 | 2 years |
20 | 50 | 5 years |
50 | 100 | 10 years |
100 | 250 | 25 years |
250 | 500 | 50 years |
500 | — | 100 years |
Timeline for Corrective Action | |
Nature of Violation | Number of Days from Inspection to Correct Functioning of Control Practice |
Timeline for Corrective Action | |
Nature of Violation | Number of Days from Inspection to Correct Functioning of Control Practice |
Silt fence | Within 3 days |
Outlet control structure | Within 3 days |
Temporary or permanent stabilization within 50' of drainage channels | Within 3 days |
Stabilized construction entrance | Within 3 days |
Pumping sediment-laden discharge into drainage channel | Immediately upon notice |
Sediment settling pond | Within 10 days |
Any other control practice not addressed in this table | Within 3 days |
Fees for Full Erosion & Sediment Control Plans |
Fees for Full Erosion & Sediment Control Plans | ||
Subdivisions, Commercial, Industrial, Residential Subdivisions * | 10 acres or less | $490.00 |
More than 10 to and including 20 acres | $815.00 | |
More than 20 to and including 50 acres | $1,140.00 | |
More than 50 acres | $1,625.00 | |
Non-Residential Individual Development Site | Individual development 1 acre to and including 5 acres | $400.00 |
More than 5 acres | $750.00 | |
Multi-Family Development Site (Apartments, Condos, Townhouses) | 10 acres or less | $490.00 |
More than 10 to and including 20 acres | $815.00 | |
More than 20 to and including 50 acres | $1,140.00 | |
More than 50 acres | $1,625.00 | |
A Non-Residential lot within a Common Plan of Development | Any lot 1 acre or greater within a Common Plan of Development | $240.00 |
Multi-Family Development within a Common Plan of Development | Any lot 1 acre or greater within a Common Plan of Development | $240.00 |
General Non-Residential/ Grading for Recreational | Any project 1 acre or greater | $240.00 |
*Fees will be assessed with each phase of development. | ||
Fees for Abbreviated Erosion & Sediment Control Plans | ||
Single Lot ESC Evaluation | Lots 10 acres or less | $25.00 |
All New, Single-Family Residential Projects | Any project 1 acre or greater or part of a Common Plan of Development | $65.00 |
Any Residential Clearing | Any project 1 acre or greater | $65.00 |
Variance Fee | $125.00 | |
Post Construction Fee Schedule |
Post Construction Fee Schedule | ||
Single Lot Residential | Single Project | $65.00 |
Residential Development Property Under Construction | For first 5 acres | $65.00 |
For additional 20 acres or any part thereof | $220.00 | |
For the next 25 acres | $190.00 | |
For all acreage over 50 acres | $125.00 | |
Non-Residential Property Under Construction | For first 5 acres | $315.00 |
For all acreage over 5 acres (per acre) | $65.00 | |
SITE INSPECTIONS | ||
Site Inspections for Both Residential and Non-Residential | Sites 1 - 5 acres | $315.00 |
Sites 6 - 10 acres | $500.00 | |
Sites 11 - 20 acres | $875.00 | |
Sites 21 - 50 acres | $1,125.00 | |
Site larger than 50 acres | $1,500.00 | |
Non-Compliant Sites | Additional inspection fee per hour for each inspection required until the site meets compliance | $65.00 |
Table 4a - Extended Detention Post-Construction Practices with Minimum Drain Times | |
Extended Detention Practices | Minimum Drain Time of WQv |
Table 4a - Extended Detention Post-Construction Practices with Minimum Drain Times | |
Extended Detention Practices | Minimum Drain Time of WQv |
Wet extended detention basin
1, 2 | 24 hours |
Constructed extended detention wetland1, 2 | 24 hours |
Dry extended detention basin1, 3 | 48 hours |
Permeable pavement - extended detention1 | 24 hours |
Underground storage - extended detention1, 4 | 24 hours |
Sand & other media filtration extended detention1, 5 | 24 hours |
Notes: 1. The outlet structure shall not discharge more than the first half of the WQv in less than one-third of the drain time. 2. Provide a permanent pool with a minimum volume equal to the WQv and an extended detention volume above the permanent pool equal to 1.0 x WQv. 3. Dry basins must include a forebay and a micro pool each sized at a minimum of 0.1 x WQv and a protected outlet or include acceptable pretreatment and a protected outlet. 4. Underground storage must have pretreatment for removal of suspended sediments included in the design and documented in the SWP3. This pretreatment shall concentrate sediment in a location where it can be readily removed. For non-infiltrating, underground extended detention systems, pretreatment shall be 50% effective at capturing total suspended solids according to the testing protocol established in the Alternative Post Construction BMP Testing Protocol. 5. The WQv ponding area shall completely empty between 24 and 72 hours. | |