Soil & Water Conservation District

Special Programs

  • Translation Services Available.  If you need assistance with the translation of this or Soil and Water Conservation District related documents, please call the District at 631-852-3285.

  • 21th Annual Long Island Regional Envirothon 
                  Tuesday, April 30, 2019

Contact Us

Corey Humphrey
District Manager
Phone: (631) 852-3285
Fax:(631) 852-3302
423 Griffing Avenue
Riverhead NY 11901

Our Services

Technical Assistance

Agricultural Irrigation
Assistance is provided for irrigation systems
evaluations, recommendations for improving
systems efficiency, design of; underground
mainlines, micro or drip systems and irrigation
water management. 
 Picture of drip irrigation
Drip irrigation
Peconic, New York
Agricultural Engineering Practices
Technical assistance is provided for the design
and construction of grassed waterways, diver-
sions, field drainage, Agricultural Handling
Facilities and other engineering practices to
control soil erosion, sedimentation and nonpoint
source pollution.
 Picture of man certifying landowner
Legislators and landowner look on as
District Manager certifies the installation
of a agricultural Handling Facility.
Cutchogue, New York

Technical Assistance

Planning, surveying, design, layout, and supervision
of practice installation including:

• Farm Conservation Practices
• Technical Assistance
• Planning, surveying, design, layout, and supervision
of practice installation including:
• Farm Conservation Practices
• Soil Erosion Control - including waterways, diversions,
terraces, land smoothing and plant material data sheets.  
• Ponds – Management Recommendations.
• Drainage Systems – Recommendations.
• Agronomic Systems.
• Irrigation Systems – Designs of Mainlines, Drip and
• Systems and Management recommendations.
• Agricultural Waste Systems.

All conservation practices must be installed according to USDA Natural 
Resources Conservation Service Standards and Specifications.Soil
Erosion Control - including waterways, diversions, terraces, land
smoothing and plant material data sheets.

Picture of micro-irrigation on nursery plants
Micro-Irrigation at Schlect Nursery.
Wading River, New York

Agronomic Practices
Recommendations such as crop rotations and
establishment of annual cover crops, are provided
to help reduce soil erosion, improve soil quality
and increase crop yields.

Picture of a field of sunflowers
Sunflowers at Bedells Vineyard
Southold, New York

Nonpoint Source Pollution Control 
Assistance is provided to agricultural producers
for pest and nutrient management techniques
which reduce the potential leaching of agricultural
chemicals into the groundwater.
Assistance is also provided to municipalities for
reducing pollutant loading into surface water
bodies from stormwater runoff.
Picture of discharge from a stormwater culvert
Discharge from a stormwater culvert.
Oakdale, New York
NYSDEC Erosion & Sediment Control
Under the NYS Department of Environmental
Conservation’s Stormwater Permit GP-0-10-001,
all developers, contractors, and subcontractors
must identify at least one trained individual from
their company that will be responsible for
implementation of the SWPPP, and have at least
one trained individual on site on a daily basis when
soil disturbance activities are being performed. 
In addition, developers must have a qualified
inspector conduct regular site inspections in accord-
ance with GP-0-10-001.
*Qualified inspectors and trained individuals must
have 4 hours of training in the principles and practices
of erosion and sediment control endorsed by NYS DEC,
\SWCD, or CPESC Inc.  (Training is valid for 3 years.) 
\Training is not required for CPESC, LA, and PE
certified persons.

            Registration Form
Picture of man giving a presentation
Paul TeNyenhuis, District Manager, teaching
the Erosion & Sediment Control class.

The Long Island Native Plant Initiative (LINPI) is a
progressive all-volunteer cooperative effort of over
30 non-profit organizations, governmental agencies,
nursery professionals, and citizens and spearheaded
by Suffolk County Soil and Water Conservation District.  
The mission is to preserve the genetic heritage of
Long Island’s native plant populations by conducting
\wildland seed collections, establishing commercial
sources of ecotypic (i.e., genetically native) seed and
plants for native plant production,  contributing seed to
a regional seed bank, fostering a demand for native
plants and serving as a propagation resource for the
nursery industry.  For more information or to become
a LINPI volunteer, please contact our office or visit.

Picture of grassland restoration project
Grassland Restoration Project
Water Mill, New York


Invasive Species
Invasive species are non-native (to the ecosystem in
which they are introduced) plant, animal, insect, or
microbe which causes or are likely to cause economic
or environmental harm or harm human health.  These
species are responsible highest declines in biodiversity
next to development and in 1998, it was estimated that
damages and subsequent control activities totaled over
$138 billion.   In an effort to help reduce the impacts of
invasive species on agriculture and biodiversity, the
District provides technical assistance on invasive species
identification and management to growers, agencies,
non-profit organizations and the general public.   Further
information on invasive species including the Suffolk County
“Do Not Sell List” can be found at the Suffolk County Invasive
Species Advisory Board link

Picture of japanese knotweed an invaise species
Japanese Knotweed
Quogue Wildlife Refuge


Native Plants
Native plants are critical structure of natural habitats
providing food and shelter for pollinators, mammals,
and insects while protecting soil, water, and air
resources from erosion, pollution and degradation. 
The District provides native plant technical assist-
ance on selecting appropriate species reflective
of site conditions, plant requirements/tolerances,
and management goals for agricultural and habitat
restoration practices.

Picture of seed collecting
Seed Collecting
Shelter Island, New York