Why am I required to report on IampM at my property The Federal Clean Water Act requires that certain New Hampshire municipalities have regulations pertaining to stormwater management on new development and redevelopment sites These regulations must require that projects under their jurisdictio ID: 912894
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FACT SHEET
Additional Information about Required Annual Inspection & Maintenance (I&M) Reporting
Why am I required to report on I&M at my property?
The Federal Clean Water Act requires that certain New Hampshire municipalities have regulations pertaining to stormwater management on new development and redevelopment sites. These regulations must require that projects under their jurisdiction inspect and maintain stormwater best management practices (BMPs) and report on these activities annually.
The purpose is to ensure that BMPs continue to function as designed and improve quality of stormwater leaving the site for their entire lifespan.
How do I inspect a BMP?
Refer to your I&M Plan, which was approved as part of your site plan approval, and contains instructions for inspection that are specific to the BMPs on your property
In general, inspections involve looking at inlets, outlets and basins/units for:
Examples of BMPs
Dry Infiltration Basin
Gravel Wetland
Rain Garden
Vegetated Buffer
Sub-surface Infiltration
Water Quality Unit
Damaged structures
Obstructions
Sediment accumulation
Debris
Erosion
Poor vegetative health
Soil compaction
Standing water 72 hrs. after rain
How do I maintain a BMP?
Source: MassDOT Source: UNH Source: VHB Source: VHB Source: VHB Source: MassDEP
Routine Maintenance Examples
Refer to your I&M Plan, which was approved as part of your site-development submittal, and contains instructions for maintenance that are specific to the BMPs on your property
Some maintenance will need to be conducted routinely (months to decades), while some maintenance will only be necessary if a BMP is damaged or failing
Repair soil erosionRepair/ replace damaged structuresRe-plant vegetationRemove invasive species of vegetationRe-grade for proper drainage
As-needed Maintenance Examples
Remove accumulated trash/ debrisRemove accumulated sedimentRemove obstructions to flowReplace filtersMow/ prune vegetationWater vegetated areas during drought