The deliverable product of a WETLAND DELINEATION PLAN in PDF format (size is 800 KB) meets or exceeds the criteria necessary for regulatory approval.
Wetland boundaries are located with differentialing GPS equipment, which is subsequently processed by a Professional Land Surveyor.
Wetlands of Special Significance, as defined by MDEP under Maine's NRPA, and other Protected Natural Resources such as vernal pools and streams, are identified during the WETLAND DELINEATION.
For US Army Corps of Engineers regulations under Section 404 of the Clean Water Act, jurisdictional determinations are completed in the field.
pit showing a well drained, upland spodosol soil.
am pleased to be able to provide wetland delineation services
in northern and eastern Maine. Wetland - upland boundaries
accurately located, mapped, and appropriate wetland - upland
in order to comply with Federal, State, and Town regulations.
This work can
assist in project planning, real estate evaluation, storm
and other development or conservation projects.
scrub-shrub wetland dominated by Alnus incana, Cornus
amomum, Betula populifolia, Acer rubrum, Carex crinita,
Calamagrostis canadesis, and Iris versicolor.
Wetland delineations arose from passage of the Clean Water Act §404,
prohibits the discharge of dredged or fill material into
waters of the
United States - rivers, lakes, streams, and wetlands - unless
a permit from
the U.S. Army Corps of Engineers (ACOE) has been authorized
or the activity
is permitted by exemption. These regulations seek to "maintain
the chemical, physical, and biological integrity of the waters
of the United
States." (1987 ACOE Wetlands Delineation Manual). In 1995
Resource Protection Act (NRPA) was amended to include jurisdiction
wetlands in the State. The Maine Department of Environmental
(MDEP) is responsible for reviewing activities that will
wetlands. MDEP developed a three-tiered permitting system
based on the area
of potential wetland impact.
Wetlands are one component of the "waters of the United
can take many forms in Maine: peatlands, fringing marshes adjacent
floodplain forest, wet meadows, intermittent streams, scrub-shrub
(alder, willow, viburnum, holly), and forested fens and bogs.
physical characteristics that classify them as wetlands: "Those
are inundated or saturated by surface or ground water at a frequency
duration sufficient to support, and that under normal circumstances
support, a prevalence of vegetation typically adapted for life
soil conditions."(1987 ACOE).
A piston core from a carbonate
lake in Aroostook County.The gray sediment at the base
is characteristic of late-glacial age (10,000 to 12,000
years before present); the tan layered marl sediments
represent lowered lake levels from 9,000 to 5,000 years
B.P., and the dark brown upper sediments indicate deeper,
more acidic water conditions similar to the modern
Wetlands are determined by evaluation of three parameters: hydrology,
and vegetation. Aquic conditions must be present to meet hydrologic
requirements, hydric soils must dominate the wetland, and hydrophytic
vegetation must also be dominant in order to classify an environment
Closed basins such as lakes, ponds, bogs, and associated wetlands
contain continuous records of sedimentation. Since deglaciation
approximately 12,000 years ago, annual layers of sediment, plant
and pollen have accumulated and become preserved in the anoxic
of these basins. Using piston
coring from a platform at the surface,
continuous records of sediment can be retrieved. Cores are
analysed for macrofossil remains, organic and carbonate content,
determinations, and stable isotopes (d13C and d18O). Analyses
cores can provide data that document: 1) The time of formation
of the basin;
2) The changing forests/ecosystems in the watershed through
time; 3) A
history of lake levels (paleohydrology) since deglaciation;
Implications/interpretations for this data.
peatland dominated by Ericaceae and Sphagna.
For example, a recent Phase III archaeological site investigation,
on uplands adjacent to a lake shoreline, required a paleohydrologic
investigation. Results from the paleohydrologic study showed
lake level fluctuations during the last 9,000 years. The lake¹s
area had diminished, its outlet had ceased flowing, and a modern
stream was functioning as the outlet. These findings suggested
archaeological settlement patterns were probably substantially
than the modern configuration of the lake basin would suggest.