National Estuary Program Success Stories
Introduction | Nutrients
| Pathogens | Toxic Chemicals | Habitat | Fish & Wildlife
Side Bars:
Public Outreach and Education | Protecting Water Quality |
Attracting Funds to Estuarine Protection | Citizen Volunteers |
Habitat Protection & Restoration | Demonstration Projects
Introduction
In the ten-year history of the National Estuary
Program, it has become evident that estuaries across the country face
many of the same environmental problems. The
flexible and collaborative nature of the NEP has allowed the local Estuary
Programs to develop many innovative approaches to address these problems,
approaches uniquely tailored to local environmental conditions, and to
the needs of local communities and constituencies. At the same time, the
national structure provided by the NEP has facilitated the sharing of
successful management approaches, technologies, and ideas. Effective
projects and programs innovated by one of the NEPs often serve as models
for similar initiatives in other NEPs and coastal areas.
Although environmental results are often slow in coming, positive signs
of improving environmental conditions are already emerging from the NEPs.
The 28 National Estuary Programs are also demonstrating success in finding
effective institutional arrangements from which to manage their estuaries,
securing and leveraging funds, and improving public education and citizen
participation though outreach efforts.
The following summaries illustrate the success that National Estuary
Programs have had in dealing with environmental challenges. While this
is not an exhaustive compilation of accomplishments, it highlights many
effective and transferrable efforts undertaken by NEPs to address the
most common estuarine environmental threats. This document will be updated
periodically to include new achievements and initiatives of the NEPs.
For more information about a given project or program discussed below,
contact the NEP in question. Click here for a list of contact information for all 28 NEPs. For more information
about innovative and successful tools, techniques, and approaches to coastal
resources and watershed management, see one or more of the following:
- Innovations in Coastal Protection - Searching for Uncommon Solutions
to Common Problems.
This document is also available on line under the title Cookbook of Innovations in Coastal
Protection.
- Coastlines,
the newsletter of the National
Estuary Program
- National Estuary Program: Links
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Nutrients
Success in Public Outreach
and Education
- The Puget Sound NEP established the Public Involvement and Education
Fund program which provides environmental education and public
involvement through competitively awarded contracts to nonprofit
groups and local tribal governments. Over a million people have
been reached and three volumes of case studies have been published.
- A Heritage Trail System was established by the Sarasota NEP
to enhance recreational opportunities and increase awareness of
Sarasota Bay and related cultural, historical, and natural resources.
The trail provides a tapestry of recreational areas (greenways),
historical places, cultural and art centers, significant natural
resource location and scenic waterway systems. Brochures will
identify scenic routes visitors can take to see waterfronts, preserves,
and parks, and identify special hiking, biking, canoeing routes,
and historic sites and museums. Logo and symbols identify the
element of the system the visitor is traveling and educational
and literature displays are also found along the trail.
- In 1994, the San Francisco NEP began a boater education project
with a grant from the California Department of Boating and Waterways.
The goal of the program is to educate San Francisco Estuary's
boating community about pollution related to vessel sewage discharges.
Discharges of untreated sewage are unsightly and can spread disease,
contaminate shellfish beds, and decrease oxygen available for
aquatic life. Educational brochures, a slide-show, and pumpout
maps were developed, and presentations have been given to groups
throughout the Bay-Delta to encourage the use of pumpout facilities.
Working closely with the U.S. Coast Guard, marina operators, marine
supply shops, boating magazines, radio stations, and boaters themselves,
the Estuary Project is getting out the message "Don't Dump! Use
the Pump." Now in its third year, the boater education project
has received $220,000, and has served as a model for similar programs
in Los Angeles and Santa Monica.
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Long Island Sound
Seeking Cost-effective Methods of Sewage Treatment
Excessive levels of nitrogen from point and nonpoint sources have contributed
to a decrease in the amount of available oxygen in Long Island Sound.
In 1987, many fishermen began noticing fish and lobster kills in the Sound.
Monitoring of the water column indicated a high amount of nitrogen and
low dissolved oxygen levels. At one point, 40 percent of the Sound's bottom
waters had unhealthy levels of oxygen. The main cause of this condition
is excessive nitrogen, a nutrient that enters the Sound through point
and nonpoint sources. Excess nitrogen fuels the growth of planktonic algae.
When they die, they settle to the bottom and decay, using up oxygen in
the process.
Studies indicated that 45 sewage treatment plants discharging directly
into the Sound contribute 48 percent of the nitrogen load. Historically,
these treatment plans used processes that remove only 10 to 20 percent
of the total nitrogen content of their waste stream, leaving high concentrations
of nitrogen in their effluent. It was clear from the studies that nutrient
removal capabilities of the wastewater treatment plants must be improved.
Conventional methods for nutrient removal were investigated in an effort
to reduce nitrogen inputs into the Sound. The cost of modifying all 45
treatment plants using conventional methods would cost up to $8 billion,
therefore, new cost effective techniques were sought. The wastewater treatment
facility in Stamford, Connecticut had experimented with a process known
as Biological Nutrient Removal (BNR). BNR is a form of sewage treatment
that uses biological organisms to remove nitrogen through two reactions:
nitrification and denitrification. Nitrification changes ammonia into
nitrates and nitrites, which can then be converted into nitrogen gas through
denitrification. Nitrogen is then released through the air. Results from
the Stamford facility suggested it was possible to achieve high rates
of removal of total nitrogen and phosphorous using BNR technology. In
addition to its potential for high nutrient removal rates, BNR could be
employed with only relatively minor changes in operation at a nominal
cost. A decision was made to further test BNR technology at two sewage
treatment plants that discharge into the Sound: the facility in Stamford,
Connecticut, and the Tallman Island wastewater treatment facility in New
York City. These sites were chosen due to facility designs, past records
of compliance with permit limits, plant operator shills and controls,
and the fact that neither plant was at or over capacity. In addition,
these plants used oxygen-supply systems typical of those in place at other
Long Island Sound treatment facilities, making project results likely
to be more broadly applicable.
The City of Stamford water pollution control facility is a 20 million
gallon per day (MGD) secondary activitated sludge treatment plant, using
mechanical aerators to supply air during treatment. Approximately 85 percent
of the facility's effluent is from domestic and commercial sources, and
15 percent is from industrial sources. The Tallman Island water pollution
control plant is an 80 MGD facility serving an urban drainage area of
approximately 26 square miles. It is also an activated sludge treatment
plant, but uses a diffused air system. The wastewater system that feeds
the facility contains storm sewers, sanitary sewers, and combined sewers.
Success in
Protecting Water Quality
- Using the Santa Monica Bay Restoration Plan as a guidance document,
the Los Angeles Regional Water Quality Control Board approved
a new municipal stormwaterNational Pollutant Discharge Elimination
System (NPDES) permit. The permit provides a 5-year blueprint
for coordinating stormwater management efforts.
- Through the efforts of citizens and the San Juan Bay NEP, the
Corps of Engineers is taking remedial action on dredged material
deposited in the Bay, which was limiting the circulation of Bay
waters. Water circulation is one of the priority problems being
addressed by San Juan Bay NEP.
- Indian River Lagoon NEP developed a unique nitrogen budget model
for the use of local governments in forecasting areas and times
when nitrogen from septic tanks and other sources would be detrimental
to water quality. Field tests and validation exercises on this
model are currently being scheduled.
- New York-New Jersey Harbor has implemented an intensive marine
debris prevention program which includes educating the public
about street litter in stormdrains, improving landfill waste handling
practices, and setting up innovative vessel trash collection and
recycling programs in marinas.
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There were four main objectives in implementing the project: 1) determine
how much nitrogen could be removed by utilizing different process control
techniques and expending minimal capital costs, 2) establish criteria
for nitrogen removal procedures that could be used by consulting engineers
and plant managers and other plants, 3) study the effects of cold temperatures
on biological processes, and 4) establish a local source of expertise
in BNR processes in order to expand its use to other nearby sewage treatment
plants, if the methods proved to be suitable.
EPA awarded funding through the Long Island Sound NEP to the Stamford
facility to continue its study of BNR and to help the Tallman Island water
pollution control facility to initiate a nitrogen removal demonstration
project. At Stamford, adjustments to the aeration system were made, and
the Tallman facility required installation of flow meters, samplers, baffles,
and mixers. None of these modifications required substantial capital investments.
Once the facilities were equipped for BNR, variations of the BNR were
system were tested for optimum nitrogen removal. For both treatment plants,
this was done by manipulating the operating process.
Both the Stamford and Tallman facilities evaluated BNR processes from
1990 to 1992. Wastewater was tested both before and after treatment for
various parameters such as nutrient levels, temperature, oxygen, and pH.These
tests were conducted at least twice weekly so that any process changes
needed to keep nitrogen removal levels as high as possible could be implemented.
The Stamford and Tallman facilities removed a significant amount of nitrogen
at rates of up to 83 and 73 percent respectively. In addition, the BNR
processes were instituted without additional staff, extensive training,
or costly modifications. Overall the success of the project has led to
the planning of wide-scale BNR implementation throughout the Sound. The
demonstration project illustrated that with little or no capital investment
and only minor changes to existing processes, secondary treatment plants
can reduce the amount of nitrogen discharged into Long Island Sound. Although
BNR was successful in reducing nitrogen in treatment plant effluent, employing
BNR in regions with colder climates may not be effective as BNR is cold-weather
limited. However, the BNR process can occur with short detention times.
Consequently, most treatment plans, even those that have reached or are
over capacity, can utilize these techniques.
Delaware Inland Bays
Using Constructed Wetlands to Control Storm Runoff
Overloading of nutrients in Delaware Inland Bays (Rehoboth, Little Assawoman,
and Indian River Bays) from point and nonpoint sources has resulted in
decreased water quality and loss of habitat. Although a few areas of are
considered healthy, products of industry and development, mainly the nutrients
nitrogen and phosphorus, have caused a noticeable decline in water quality
and loss of habitat. Excessive amounts of nitrogen and phosphorus have
robbed the once healthy waterbodies of oxygen leading to either fish kills
or movement of fish to other areas. The high levels of nitrogen and phosphorus
have also inhibited the growth of submerged aquatic vegetation (SAV) in
the Inland Bays, eliminating the freshwater habitat needed by wildlife
such as scallops, white perch, and striped bass. Presently, no substantial
SAV beds exist in the Bays, and previously existing soft clam, bay scallop,
and oyster fisheries are, for the most part, extinct.
A 1988-1990 study of nutrient loads indicated that the nitrogen and phosphorus
inputs to the Bays come from both point and nonpoint sources; nonpoint
sources, especially stormwater runoff, however, are the primary source
of nutrients to the Bays. It has been estimated that nonpoint sources
contribute 1,040 tons of nitrogen per year and 30 tons of phosphorus per
year to Indian River and Rehoboth Bay. Loadings have increased in areas
with large amounts of impermeable surfaces such as roadways or parking
lots.
An industrial park was chosen as a demonstration project to test the
method of using a constructed wetland for stormwater control. The Delaware
Inland Bays NEP joined forces with the Delaware Department of Natural
Resources and Environmental Control, the Soil Conservation Service, the
Sussex Conservation District, and the Sussex County government to develop
a plan to demonstrate the use of an artificial wetland for stormwater
management and habitat creation. The objectives of the project were to
reduce nitrogen and phosphorus loads entering the Bays, create additional
habitat for wildlife, and demonstrate the effectiveness of using an artificially
constructed wetland for stormwater management. The Georgetown Industrial
Park located in and owned by Sussex County, Delaware was selected as the
demonstration site.It is a highly urbanized 200-acre site with an airport
occupying about one-half the site, whereas the other half contains light
industrial businesses. Stormwater and nutrients are transported directly
into a tributary of Indian river, Perterkins Branch. The Indian River
then carries the nitrogen and phosphorus-laden stormwater eastward to
the Delaware Inland Bays.
Design and construction of the pond was completed in 1991 and planted
with emergent wetland plants in 1992. The design and construction phases
of the project involved a number of steps. First, staff wetland biologists
field verified that there was no natural wetlands at the site. Second,
the constructed wetland was designed as an "off line" treatment system.
Flow diversions were designed for placement in the two existing drainage
ditches to direct the first inch of runoff from the industrial park to
the wetland. This "off line" approach would divert the first flush to
the wetland, while larger flows could continue unimpeded. Third, construction
was sequenced so the wetland was built from the outside-in, allowing the
emerging pond to act as its own sediment basin during construction. The
actual connection of the pond with the existing drainage ditches was not
done until the entire excavation was completed and the site was stabilized
by vegetation above the normal pond elevation. Fourth, to enhance wildlife
benefits, the wetland was constructed in an irregular shape and 75 percent
of the depths in the pond were less than 2 feet. An island was built in
the pond to lengthen flow paths from inflow to outflow, providing a secure
location for nesting birds. The outlet consisted of a weir structure with
splash boards to control the pond elevation as needed. Finally, approximately
30 percent of the pond surface area was planted with emergent plants to
accelerate the development of the wetland. Wetland planting took place
a year later so the grasses and brush could have a full growing season
to maximize planting success.
The Georgetown Stormwater Management Demonstration Project proved to
be an innovative, successful, and attractive way to control stormwater
runoff. While holding the stormwater, the wetland removes nitrogen, phosphorus,
and other pollutants through filtration by wetland plants, microbial activity,
and uptake by wetland plants and algae, before gradually releasing stormwater
to the Bays. It is estimated that up to 60 percent of the nitrogen and
40 percent of the phosphorus is removed from the stormwater after flowing
through the wetland. In addition, the suspended sediments could be reduced
by up to 80 percent and trace metals by approximately 60 percent. The
wetland, maintained by the State of Delaware, has also flourished as a
habitat for plants, waterfowl, mammals, insects, and fish. Vegetation
as well as plant diversity is booming, and many waterfowl have been sighted
at the wetland. Some species, such as duck and quail, have established
nests.
Some additional lessons were learned from the project. A major cost factor
for any stormwater management project is the cost associated with the
removal and disposal of earth excavated from the project site. Consideration
should be given to disposal locations close to the site. In the case of
Georgetown Stormwater Management Demonstration Project, fill material
was needed to extend a runway at the nearby airport, so the materials
had to be trucked only a short distance. Plantings should be done at a
time of year when the plants have a full growing season to ensure rapid
and lush growth.
Tampa Bay
Forging Partnerships to Manage Nitrogen and Restore Sea Grasses
Pollution and dredging have destroyed more than half of the bay's grass
beds since the turn of the century in Tampa Bay. However, aerial photographic
surveys have documented recovery of more than 3,000 acres of new or expanded
seagrass beds in Tampa Bay since 1988, some in areas that have been barren
for decades. This remarkable recovery is strongly correlated with reductions
in nitrogen loadings to the bay.
The weight of scientific evidence indicates that the dieback of seagrasses
which accompanied the rapid urbanization of the Tampa Bay region (excluding
beds which had been buried or physically removed by dredging or filling)
was due to insufficient light reaching submerged grassbeds. The primary
cause of reduced light penetration was an overabundance of phytoplankton
(algae suspended in the water column) which was being fueled by excessive
nitrogen input to the bay.
Controlling nitrogen the bay's nitrogen intake as a means of restoring
vital underwater seagrass beds had been one of the most prominent initiatives
of the Tampa Bay NEP. Seagrass beds were selected by the NEP as a yardstick
by which efforts to improve the bay will be measured because of their
overall importance to the bay ecosystem, and because they are an important
barometer of their environment, indicating changes in long-term water
quality.
An Action Plan was developed by the Tampa Bay Nitrogen Management Consortium
after a year-long effort to achieve the nitrogen management goals adopted
by the NEP. The Tampa Bay Nitrogen Management Consortium is comprised
of local utilities, phosphate mining and fertilizer handing companies
and agricultural interests, as well as the Tampa Bay NEP's six local government
partners and regulatory agencies. The Action Plan combines for each bay
segment all local government, agency and industry projects that will contribute
to meeting the 5-year nitrogen management goal of reducing or precluding
56 tons per year of nitrogen loading which comes from atmospheric deposition,
industrial point sources, fertilizer shipping and handling, and intensive
agriculture.
The Tampa Bay NEP adopted a long-term goal of recovering 12,350 acres
of seagrasses baywide. This number roughly represents the seagrass acreage
that existed in 1950, excluding areas that have been permanently altered
by dredging or filling activities.
Empirical water quality models developed through the NEP for each major
segment of the bay indicate that water quality in the bay has improved
sufficiently to allow the seagrass recovery goal to be achieved, over
time through natural regrowth. To maintain existing water quality and
sustain the seagrass recovery process, the NEP has adopted a five-year
nutrient management goal to cap nitrogen levels at existing levels (1992-94
average). Nitrogen loading to Tampa Bay is expected to increase 7 percent
by the year 2010 as a result of population growth and related development.
This equates to an increase of slightly less than 17 tons per year of
nitrogen loading each year, or an increased loading rate of 84 tons per
year by the year 2000. Consequently, local governments and industries
will need to reduce or preclude loadings to the bay by this amount in
order to maintain the bay's current nitrogen levels.
Local government and agency partners in the NEP have accepted responsibility
for reducing or precluding their future nitrogen contributions associated
with stormwater runoff and point-source discharges by approximately 28
tons per year by the year 2000.
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Pathogens
Success in Attracting Funds
to Estuarine Protection
- As a result of a demonstration project conducted by Corpus Christi
bay NEP to reduce NPS pollution, the King Ranch in Texas initiated
their own study at a cost of $400,000 to determine the effects
of runoff from their croplands, which may be a factor in causing
Brown Tide.
- Narragansett Bay NEP has successfully tapped into other funding
sources and influenced the spending of local dollars on implementation
of their Comprehensive Conservation and Management Plan. From
1993-1997, the Narragansett Bay NEP has been able to access over
$850,000 beyond annual funding from EPA.
- The Crystal Trust Foundation granted $25,000 to the Center for
the Inland Bays (DE) to hire a part-time public outreach coordinator
and pay for graduate student interns developing estuary education
programs.
- A public-private partnership has been successful in raising
$50 million per year for 3 years from San Francisco Bay urban
water users to acquire and restore wetlands habitat.
- The New York/New Jersey Harbor NEP, in coordination with the
New York City Parks Department is using funds from the Exxon Valdez
account to revegetate park areas and reduce sedimentation and
erosive runoff in some parks where steep slopes drain into the
Hudson river. The cost of the project is $150,000.
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Santa Monica Bay
Using Research and Management
to Reduce Human Health Risks
In order to determine how safe it is to swim in Santa Monica Bay, the
Santa Monica Bay Restoration Project conducted an epidemiological study
in 1995 involving a wide variety of state and local agencies, the scientific
community, and environmental organizations. The study demonstrated for
the first time the association between health risks and swimming in urban
runoff-contaminated waters. The findings could also apply to any urban
area in the country with recreational areas impacted by urban runoff.
Since the release of the study results in 1996, the Los Angeles County
Department of Health Services has adopted the use of this new indicator
in the County's beach warning and closure protocol. With the solid scientific
information provided by health effects study, the Santa Monica Bay Restoration
Project can now confidently report to the public about the relative health
risks of swimming at various locations around the Bay. This indicator
has also proved useful because it can easily be converted from traditionally
used measures, allowing for evaluation of historical trends.
A survey team patrolled beaches in Santa Monica watching for swimmers
who put their head underwater near the outlets of storm drains as well
as those farther away from the drains. When the swimmers came ashore,
the surveyors asked for their telephone numbers so they could be called
later and asked about symptoms. Over 13,000 swimmers were contacted 9-14
days after their initial questioning and were asked about whether they
had a fever, chills, ear ache, eye discharge, infected cut, skin rash,
nausea, vomiting, diarrhea, stomach pain, coughing, coughing with phlegm,
sore throat, nasal congestion, a group of symptoms indicative of "highly
credible gastrointestinal illness" and "significant respiratory disease".
Daily water samples were also taken at and near storm drain locations
and analyzed for total and fecal coliform bacteria, enterrococci, and
E. Coli. Water samples were also collected at storm drain sites every
weekend and analyzed for enteric viruses.
The results of the study showed that swimmers who swim in front of a
flowing storm drain could experience an increased risk for fever, chills,
ear discharge, vomiting, coughing with phlegm in comparison to those who
swam over 400 yards away. Although in is not yet known what specific pathogens
cause illness, the study confirms that the bacterial indicators that are
being monitored do help to predict risk.
As a result of the study, the Santa Monica Bay Restoration Project developed
an agenda to respond to the findings of the study. The three components
of the agenda are to implement source control measures, identify and prevent
pathogen sources, and educate and advise the public about the health risks
of swimming near storm drain outlets. Some of the on-going or proposed
actions include using Best Management Practices such as storm drain stenciling
and street sweeping, investigating and correct malfunctioning septic systems,
identify and eliminate illicit connections and illicit discharges to the
storm drain system, and warn swimmers to stay away from storm drain outlets.
Signs have been posted near storm drain outlets on beaches along Santa
Monica Bay warning swimmers to stay at least 100 yards from storm drain
outlets.
The study was a follow-up to an earlier investigations conducted by the
Santa Monica Bay Restoration Project where human pathogens were detected
in summer runoff. Possible sources of pathogen contamination into the
storm drain include illegal sewer connections, leaking sewer lines, malfunctioning
septic systems, illegal dumping from recreational vehicles, or direct
human sources such as campers or transients. Other potential sources of
human pathogens in near shore areas include sewage spills into storm drains,
small boat waste discharges and swimmers themselves.
Buzzards Bay
Constructing Wetlands to Reduce Stormwater Pollution
To address shellfish bed closures in Sippican Harbor (Spragues Cove) near
the Town of Marion, Massachusetts, the Buzzards Bay NEP constructed a
three-acre wetland. The wetland was created on a site of a former saltmarsh
now a parking lot, treats stormwater runoff and associated non-point source
pollutants from impervious areas such as roads, driveways, and rooftops,
and restore coastal habitats. Spragues Cove is a three-acre area of valuable
shellfish beds surrounded by single family homes to the north and west
of the cove. The shellfish beds at the cove are closed to harvest because
they exceed state and federal fecal coliform bacteria standards for shellfishing.
A sanitary survey identified stormwater as a major contributor of fecal
coliform bacteria to Spragues Cove. The area adjacent to the cove (Silvershell
beach) is so the sole bathing beach area in Marion. Due to poor drainage
in Marion resulting from the presence of near-hydric soils, infiltration
management strategies were not a viable option. However, sufficient land
areas existed at Spragues Cove to allow for the use of a constructed wetland
as a treatment mechanism to remove most sediments and bacterial contamination.
The result was a series of constructed wetland basins adjacent to the
Silvershell beach parking lot to capture and infiltrate the stormwater.
The constructed wetland consists of a settling basin, shallow marsh, deep
pool, and a stone-lined outlet. The physical and biological processes
that normally occur in a wetland will treat and remove the pollutants
from the water. A monitoring program has been established to gauge the
effectiveness of the stormwater remediation efforts.
After just one year, aquatic vegetation has grown vigorously within the
wetland system. Many seeds and plants established by town volunteers have
become established in the shallow marshes and along the periphery of all
basins. Intensive sampling indicated an overall reduction in fecal coliform
bacteria. Sand silt, trash, and other debris have been settling in the
sedimentation/settling basin rather than being discharged to the cove.
Additional wetland plants were also planted in and along the channel to
improve soil stability as well as discourage geese. Because large waterfowl
such as geese present a potential fecal coliform problem, tall grasses
and wildflowers on interior and main dikes will be encouraged to grow
to discourage their residence. As vegetation continues to become established,
it is expected that coliform counts will continue to decline.
Buzzards Bay
Improving Wastewater Treatment
Buttermilk Bay, a small tidal embayment near the towns of Bourne and Wareham,
Massachusetts, was closed to shellfishing due to high levels of fecal
coliform bacteria. A water quality study by the Buzzards Bay NEP revealed
that closure of shellfishing areas was often required following periods
of rain due to contamination by pollutants in stormwater runoff and illustrated
that storm drains were the greatest source of fecal coliform bacteria.
Other sources of fecal coliform bacteria included septic systems, wildlife
fecal waste, marina discharges, and freshwater inputs (streams, marsh
areas).
Of the approximately 30 stormdrains that discharge into Buttermilk Bay,
the storm drains in the town of Bourne and Wareham were selected for treatment.
The town of Bourne installed several subsurface stormwater infiltration
systems to address runoff from a parking lot and town boat ramp. The town
of Wareham is currently working with the Buzzards Bay NEP to design and
construct stormwater treatment units. The town of Bourne is just beginning
remediation work on eight stormwater discharges to Buttermilk Bay. By
correcting these stormwater inputs, the existing shellfish closures will
be reduced to the smallest area possible, and the threat to existing open
areas will be significantly lowered.
The oldest stormwater control system constructed in the town of Bourne
achieved a 98% reduction in fecal coliform levels. In addition, through
the efforts of Bourne and Wareham, the communities extended sewer lines
and replaced failing septic systems, thereby reducing this important potential
pollution source. Public education and outreach efforts by the community
enabled citizens to become informed and provided guidance on how they
could become part of the solution. As a result of these actions, Buttermilk
Bay's water quality shows marked improvement. At the start of the project,
all of Buttermilk was closed to shellfishing and recreational activities
due to high coliform levels. Today, due to stormwater control and septic
system improvements, 90% of the bay is presently open.
Narragansett Bay
Tracking Down Sources of Pathogens and Finding Fixes
Greenwich Bay, a 4.9 square mile embayment of Narragansett Bay is one
of the East Coasts most productive shellfish areas. It is depended upon
as a winter harvest area and until 1992 provided nearly 90% of the winter
shellfish take. The Bay is home to 4,000 recreational sailboats and power
boats. None of the Bay's 19 marinas were equipped with pumpout facilities
that remove sewage waste from recreational boat holding tanks. Boater
waste is considered an important source of pollution in Greenwich Bay.
Most of the shoreline neighborhoods are serviced by individual cesspools
or septic systems that were designed before stringent regulations were
developed. Outdated, overburdened and poorly maintained, they are thought
to be an important source of bacterial and nutrient pollution. Stormwater
runoff is also another major contributor to bay pollution and includes
pollutants such as heavy metals, petroleum products, bacteria, sediments,
and nutrients. The Bay was closed to shellfishing from 1992 to 1994 and
in 1994 the Bay was conditionally reopened in dry-weather for harvesting.
The Narragansett Bay Project worked with the Rhode Island Department
of Environmental Management, the City of Warwick, and Save the Bay to
reduce bacterial pollution so the bay could be re-opened to recreational
and commercial shellfishing. The long-term goal of this effort, the Greenwich
Bay Watershed Restoration Initiative, is to improve the bay so it can
support eelgrass beds, bay scallops, and other living resources.
A pollution source investigation study was undertaken and a few streams
and stormdrains accounted for the majority of the fecal coliform bacterial
loading. Hardig Brook watershed was identified as containing 50 to 90
percent of the bacterial loads to the bay. After taking water quality
samples during two dry weather periods, preliminary results pointed to
a major source coming from an urban mill complex. Further intensive sampling
proved that several restrooms in the mill had direct discharges to the
stream. Coordination with the Narragansett Bay Project and the City of
Warwick led the mill owner to connect to an existing sewer line without
the need to invoke fines or legal action.
Water quality samples were then taken during three target storm events
in 1994 and early 1995. Initial results led far upstream where fecal coliform
levels were so high, a broken sewer line or failed sewer pump station
was suspected. More intensive sampling ruled those out and let the investigation
further upstream again. Finally, a dairy farm was discovered that had
its manure storage pile located in just a way that runoff from the barn
roof and farmyard carried contaminants to a small tributary of Hardig
Brook. As soon as the farm was identified as a source of contamination,
rapid coordination ensued among the farmers, Narragansett Bay NEP, the
Natural Resource Conservation Service, City of Warwick and the Rhode Island
Department of Environmental Management. Through this effort, best management
practices funded in part by the Narragansett Bay NEP were designed and
implemented.
In addition to the agricultural BMP, the Narragansett Bay NEP developed
a marina pumpout facility siting plan. The pumpout plan evaluates boat
densities and pinpoints where new pumpout facilities are needed. Pumpout
facilities are important to the Bay's small, poorly flushed coves. When
Clean Vessel Act funds for facility construction became available, the
siting plan was the basis for awarding grants. While there were no pumpout
facilities, now there are eight in Greenwich Bay.
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Toxic Chemicals
Citizens Volunteering
to Restore and Protect Estuaries
- The Paterson Creek Pals, a volunteer stream stewardship group
of the Tillamook Bay NEP has planted over 2000 trees, collected
monthly baseline water quality data, monitored insect communities
using light traps, sponsored creek cleanups, monitored fish populations
by seasonal trapping, and provided educational brochures to the
community.
- 4,000 acres of seagrass and 400 acres of wetlands have been
restored in Tampa Bay through the involvement of volunteers and
the Bay Conservation Corps.
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Galveston Bay
Serving as a Model for Voluntary Pollution Reduction
Galveston Bay's watershed lies in one of the most heavily industrialized
and most heavily populated regions in the U.S. Wastewater discharges from
communities and industries in Galveston Bay account fully for half of
the State's total wastewater discharges every year. A subwatershed for
Galveston Bay, the Houston Ship Channel, has 550 permitted wastewater
dischargers that account for 13.4% of the State's wastewater. Since some
pollution entering the Ship Channel comes from industrial businesses located
near the Channel, the Galveston Bay Program worked with the Texas Natural
Resource Conservation Commission to decrease the amount of pollution through
source reduction and waste minimization techniques.
The Galveston Bay Program and the Texas Natural Resource Conservation
Commission worked to define the pollutants of concern in the Channel,
identifying the businesses located near the channel, selecting businesses
to voluntarily participate in the programs, conduct training and pollution
prevention audits for selected businesses, and following-up with businesses
to evaluate the program's success. Industrial waste audits, waste recovery
methodologies, and waste exchange programs were discussed with industrial
discharges. Lessons learned from the project were implemented through
the state-wide Clean Texas 2000 program of the Texas Natural Resource
Conservation Commission. Industries are given the opportunity to become
a part of the program by voluntarily reducing their waste production by
at least 50% by the year 2000. The program today is one of the largest
voluntary pollution prevention programs in the country.
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Habitat
More Successes in
Protecting and Restoring Habitat
- The Leffis Key Restoration project from Sarasota Bay NEP created
30 acres of productive intertidal habitat. More than 50,000 native
plants and trees were installed at a cost of $315,000. The restoration
project was featured in Good Housekeeping magazine and won an
Environmental Excellence Award from the Florida Marine Research
Institute.
- The creation of an island in the San Jose Lagoon, which is habitat
to numerous birds in San Juan Bay, was made possible by the coordination
between San Juan Bay NEP, the Corps of Engineers and citizens.
At a cost of $120,000 the project used debris from a recently
constructed bridge. The debris had been deposited into the lagoon
and was causing navigation hazards.
- The Long Island Sound formed a Habitat Restoration Team to develop
a restoration plan for the full range of terrestrial and estuarine
aquatic habitats adjacent to and in the Sound. A partnership of
federal and state agencies, non-profit organizations, and citizens
groups has secured over $700,000 to fund 9 habitat restoration
projects. These initiatives include restoration of salt marshes,
fish passages, grasslands, and freshwater wetlands. Several additional
government and non-governmental groups have expressed an interest
in becoming involved with some aspect of the Long Island Sound
Habitat Restoration Strategy, and the approach has served as a
model for restoration planning in other parts of the country.
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Sarasota Bay
Protecting Seagrasses
The Sarasota Bay NEP has found that seagrass beds have grown 6 percent,
or by about 352 acres in Sarasota Bay since 1988. Three major activities
that reduced wastewater-related nitrogen loads to the bay: 1) in the northern
portion of the bay, a large regional wastewater treatment plant successfully
resolved problems with its secondarily treated effluent through expansion
of agricultural re-use programs and the development of a deep-well injection
site (ca. 2600 feet) for wet weather disposal of effluent, 2) in the central
portion of the bay, the wastewater treatment plant was upgraded so the
concentration of total nitrogen dropped to less than 2 mg/lwith a concurrent
increase in the amount of effluent made available for re-use, and 3) in
the southern portion of the bay, a combination of surface water discharges
and groundwater transport of nitrogen-rich effluent from a regional secondary
treatment plant was halted through the use of a deep-well injection site
for effluent (it appears that nitrogen loads from these treatment plants
were all but eliminated). In response, seagrasses have begun to flourish
again in Sarasota Bay.
Sarasota Bay
Restoring Intertidal Habitat
Habitat loss and encroachment of non-native plants are major problems
threatening Sarasota Bay. Rapid development has vastly changed the Bay's
ecosystem by eliminating a large portion of the shallow-water habitat.
Pristine shorelines have been replaced by seawalls, bulkheads, and riprap.
Historically, disposal of derogate materials changed natural shoreline
elevations and destroyed much of the vegetated areas that are vital to
the Bay's health. These areas supply food and shelter for fish and shellfish,
provide nesting places and habitat for birds and wildlife, filter pollutants,
and slow erosion.
City Island, like many areas of the Bay, had lost most of its intertidal
habitat and native vegetation. The property is owned by the City of Sarasota
and was used as a disposal site for dredged material and construction
debris. Disposal activity disturbed the shoreline and dredged material
piles created unnatural elevations susceptible to encroachment by non-native
plants, particularly Australian pines and brazilian pepper trees which
smother much of the native ground cover.
The Sarasota Bay NEP joined forces with he City of Sarasota, the Florida
Department of Environmental Protection, the Florida Department of Natural
Resources, Sarasota County Natural Resources Department, Sarasota County
Parks and Recreation Office, Mote Marine Laboratory and EPA to plan and
implement the restoration project.The primary objective of the City Island
project was to restore highly productive, diversified, and integrated
habitats to the project site, and in the process, develop a model for
restoring similar sites in the Bay. Equally important objectives were
to increase public access to the Bay, and to provide opportunities for
public education and participation.
Project planning and design began in 1990 and five key restoration components
were identified; 1) removal of debris and non-native plant species, 2)
restoration of natural land elevations, 3) excavation of six intertidal
pools, 4) replanting of native vegetation, and 5) construction of a public
boardwalk (BayWalk). The City Island Project was implemented in several
stages. In November 1990 bulldozers and other heavy equipment rolled in
to begin excavation and removal of the pines and pepper trees and other
non-native vegetation. Two tons of debris were removed during this extensive
site cleanup. Excavated material was stored on site and used for on-site
fill to create wetland and upland habitat for native birds and animals.
Once cleanup was complete, six intertidal pools were excavated. The pools
were designed with variations in depth and size to attract a diversity
of estuarine species such as scallops, mullet, redfish, and black drum
that were once abundant in Sarasota Bays tide pools. In December 1990,
more than 100 volunteers planted over 20,000 native plants (mostly marsh
grasses). These plants helped create a transition from the shoreline to
existing bay seagrasses about 15 feet offshore. Mangroves, gumbo limbo
trees, and sea grapes were also planted around the island to create upland
habitat and to help stabilize the shoreline. During the final phase of
the restoration, the BayWalk was constructed, greatly expanding public
access to the restored site. Throughout 1991, interpretive signs were
developed and placed along the BayWalk to enhance public awareness. The
Sarasota BayWalk was formally dedicated in April 1992.
The City Island project is an outstanding model for restoration projects
in Sarasota Bay and for other estuaries where private land ownership makes
acquisition and restoration of large areas of intertidal and subtidal
habitat difficult, if not impossible. The project demonstrated that by
using small, publically owned parcels of land, multi-se habitat modules
can be developed quickly and cost-effectively.
Many species native to the Bay (scallops, conch, striped mullet, and
sea trout) have been sighted in the tidal pools since 1991. Over 90 percent
of the new vegetation, including over 200 red mangroves is thriving. Volunteers
and city employees work together to maintain the area and remove non-native
vegetation regularly. The BayWalk is also used extensively by the public
(it is estimated that approximately 10,000 to 20,000 people visit the
BayWalk each year).
Project officials learned that the shorelines were too linear and the
bottoms too smooth to support enough microhabitats for fisheries. A subsequent
restoration project successfully used more variations in hydrology and
symmetry to correct the problem and create artificial reefs.
Puget Sound
Restoring Creek Habitat to Reduce Sediments and Pollution in the
Sound
Nonpoint source pollution has contributed to declines in Puget Sound's
water quality and has resulted in numerous shellfishing area closings.
Large amounts of fine sediment deposited in the sound from Shell Creek
watershed located in southwest Snohomish County, Washington near the City
of Edmonds. The creek, which discharges into Puget Sound receives stormwater
runoff from 2 square miles of suburban neighborhoods. The neighborhoods
were almost completely developed before on-site stormwater quality control
was required starting in the late 1970s. Additional development added
to runoff flowing into Shell Creek, causing stream bed erosion and loss
of vegetation essential to filter pollutants and stabilize sediments.
Without vegetation and stable stream beds to help control water flow,
the water velocity and volume increased which lead to area flooding. The
rapid water flow swept up the loose sediment and bottom gravel of Shell
Creek and discharged the load, along with other pollutants from nonpoint
sources into Puget Sound. The increased volume and velocity of water flow
in the creek cut away at the stream bed until only clay remained at the
bottom of the bed. As a result there was no pooling in the creek for cutthroat
trout and coho and chum salmon to successfully spawn and their populations
dwindled.
The City of Edmonds and Shohomish County prepared a plan for the Shell
Creek basin. The plan recommended comprehensive approaches to slow the
resource degradation that was occurring in Shell Creek and impacting the
Sound. The plan addressed flooding, severe erosion of the stream bed,
very heavy sedimentation, and increased pollutant loading. Secondary problems
included reduced capacity in culverts and loss of fish habitat. Based
on the plan's recommendations, the Shell Creek Stormwater Diversion Demonstration
Project was initiated by the City of Edmonds with support from the Puget
Sound NEP.
The primary objectives of the project were to manage stormwater flows
and reduce sediment and pollutant loadings into Puget Sound. This would
be achieved by stream bed restoration and construction of a stormwater
diversion and sediment entrapment system in Shell Creek and its tributary
Hindly Creek. Construction of a system to divert peak flows from Shell
Creek and Hindly Creek to a new storm sewer system and outfall, was recommended
by the Shell Creek Basin Plan. A recommended route designed to divert
approximately 100 cubic feet per second (cfs) from Shell Creek and 50
cfs from Hindly Creek was approved.
The Shell Creek diversion structure has a vertical slot entrance (including
a fish ladder to help fish migrate) that restricts flow and causes water
to crest over two weirs. Screens to prevent trout and salmon fingerlings
from entering the diversion lines were installed along with trash racks
to stop floating debris. The diversion at Hindly Creek is a manhole which
was added to the existing culvert. The manhole had a 12-inch outlet pipe
which carries the stream's base flow and a 36-inch outlet pipe which carries
the diversion flow.
To re-establish trout and salmon populations and to restore stream bed
and bank stability, the demonstration project included a restoration component
focusing on a mile of Shell Creek upstream from the diversion structure.
To encourage salmon and trout populations to return to the stream channel,
water flow had to be slowed down, and desirable stream bed conditions
had to be created. The clay bottom was replaced with gravel, which helped
pool the water, enabling fish to enter the channel. The gravel also created
an adequate spawning ground for salmon by providing protective niches
for the eggs. Prior to the demonstration project, Shell Creek was very
poorly vegetated. Revegetation to provide stream bank and sediment stabilization
was essential to the long-term success of project. With the help of a
local Boy Scout Troop, the steam banks were planted with willows, snowberry,
and serviceberry plants. In addition, bank log armoring and log check
dams were constructed to protect the re-established vegetation and reduce
erosion.
Through stream bed restoration and construction of a stormwater diversion
and sediment entrapment system, sediment loading to the Puget Sound from
Shell Creek was reduced by 5.7 tons in the first year and is estimated
to have reduced stream bed erosion by 65%. The diversion structure can
trap about half the sediment transported to the creek. Citizens now report
that clear water runs through the creek where muddy water used to be prevalent.
There is evidence that the stream bed and banks are stabilizing most of
the sediment and that the reduced water flow now allows for the settling
of loose particles. In addition, flooding and erosion have been eliminated
which in turn had reduced pollutant loadings downstream. Restoration has
also re-established the fish spawning habitat and trout and salmon have
returned to Shell Creek. The reduction in stream bed erosion had helped
the willow, snowberry and serviceberry plants to flourish on the stream
banks, which has further reduced erosion and created more opportunities
for trapping pollutants.
Stream bed restoration and erosion control were accomplished upstream
of the diversion at a much lower cost than the diversion upstream. However,
methods that worked above the diversion were not practical as a long-term
solution in the lower reaches of Shell Creek because the lower portion
of the creek is located in residential backyards.
Galveston Bay
Oyster Reef Construction- Turning a Waste Product into Productive
Habitat
Loss of habitat and declines in living resources are priority environmental
problems in Galveston Bay. Galveston Bay lacks suitable quantities of
reef substrate for the attachment of oyster spat because of subsidence,
disease, weather factors, dredging, and continuous removal during harvest.
Resource managers were seeking a biologically acceptable and cost effective
substrate material that would provide an alternative to the historical
practice of dredging relic shell beds in coastal estuaries, which is costly
and can produce negative environmental impacts. The Galveston Bay Program
worked in partnership with Houston Lighting and Power Company, the Port
of Houston Authority, and the National Marine Fisheries Service can work
can work together to support the creation and management of a 5 acre oyster
reef utilizing 12,100 yds3 of coal combustion byproduct pellets.
The coal ash or combustion byproducts used in the construction of artificial
reefs are comprised of two basic elements, fly ash and bottom ash. Fly
ash consists mainly of silicon oxide, alumina, ferric oxide and calcium
oxide and is a finely divided noncombustible residue captured from exhaust
gases. Bottom ash is a noncombustible granular material which falls to
the bottom of a furnace during coal or lignite combustion. The rough texture
of coal combustion byproducts is advantageous for the attachment of marine
fouling organisms, and the surface area and interstitial space in the
reef allow maximum flow or water and nutrients through the reef. More
than 500,000 tons of coal combustion byproducts are produced annually
at four coal fired generating units at one of Houston Lighting and Power
Company power plant (70% of this coal ash is recycled as an ingredient
in various construction activities, 30% must be stored or disposed of
in landfills or recycled into something useful).
The coal combustion byproducts from burning western coal are an environmentally
safe biologically sound and cost effective reef substrate material. The
coal combustion reef has and continues to exhibit successional stages
in the development of a climax o yster reef community. Optimum site selection
combined with pellet deployment during peak oyster spawning activity resulted
in the heaviest recorded natural oyster set on Galveston Bay substrate
in at least 40 years.
Galveston Bay
Taking the Lead in Protecting Coastal Habitat
Lack of an integrated management strategy among regulatory agencies threatened
the ability to protect the water quality and wildlife habitat of Christmas
Bay and Armand Bayou in Galveston Bay. Christmas Bay is a near-pristine
9 square mile embayment in the far southwest portion of Galveston Bay.
It is home to three of four seagrass species found virtually nowhere else
in the bay, and eight endangered or threatened species including the bald
eagle, brown pelican, whooping crane, and sea turtle. Emergent and submerged
wetlands and seagrass meadows have suffered significant losses. Armand
Bayou is 7 linear mile waterway located on the western shore of Galveston
Bay. It is a hardwood and prairie bayou surrounded by undeveloped flood
plain and several major urban activity centers, including the NASA Johnson
Space Center, a petrochemical complex, an oilfield, and an airport. The
Bayou's water quality is poor with high nutrients and many acres of wetlands
have been lost to subsidence caused by groundwater and petroleum withdrawl.
In an effort to be proactive in the preservation of Christmas Bay and
Armand Bayou, local, state, and federal officials with much public support,
rallied together to designate these waters as Texas Coastal Preserves.
This designation meant the two preserves would have permanent preserve
status, and consequently, permanent protection of water quality, living
resources, and human health. The designation required the development
of a management plan, accepted by all relevant agencies in the region,
which would provide guidance in the management of the resources. The primary
objective of the demonstration project was the designation of Christmas
Bay and Armand Bayou as preserves. An equally important objective was
the development of a comprehensive management plan for each area to help
protect and enhance the area resources. EPA, the Texas General Land Office,
Texas Parks and Wildlife Department, and the Texas Natural Resource Conservation
Commission joined forces to develop and execute the preserves demonstration
project.
First a grant proposal was developed and the Galveston Bay NEP developed
a preserve nomination package for submission to a reviewing committee.
After attaining preserve designation, management plans were developed
after undergoing the following steps: 1) boundary designation through
tide gauge operations - tide data were needed to establish the boundaries
of public lands which would which would ultimately define the preserves,
2) compile environmental inventories for each preserve on endangered species,
permitted point sources of wastewater discharge, dredging activity, agricultural
practices and monitoring data, 3) completed regulatory surveys for existing
limits of jurisdictions for agencies and the federal, state and local
levels, 4) evaluated critical regulatory gaps, overlaps, and coverage
and generate ideas to enhance interagency coordination, 5) draft a preliminary
management plan to manage water quality, habitat, living resources, and
human influences on each area, 6) implement the management plan focusing
on resource use, including wastewater discharges, fisheries, petroleum
releases and recreation, and 7) hold public meetings to stimulate public
involvement in the creation and management of the preserves.
As a result of management plan implementation, water quality monitoring
in Armand Bayou has taken place weekly by volunteers. Data are being compiled
and analyzed for trends in water quality to help identify persistent problems
in the Bayou's water. Implementation of the management plan has all but
assured protection of Christmas Bay for future problems, and has provided
local organizations with a strategy for improving Armand Bayou. The project
established a precedent for interagency cooperation and illustrated that
designating waterbodies as preserves can help ensure their resources are
protected, conserved, and enhanced on a long-term basis.
Tampa Bay, Indian River Lagoon,
and Sarasota Bay
Enlisting the Community to Create Habitat and Enhance Water Quality
The Florida Yards and Neighborhoods Program was developed to address the
results of explosive population growth, such as stormwater runoff pollution
and loss of native habitat in Florida bays and waterways. The program
is a partnership of the University of Florida County Cooperative Extension
Services, the National Estuary Programs of Sarasota Bay, Tampa Bay, and
Indian River Lagoon as well as Florida Sea Grant College, members of the
landscape industry, and concerned citizens. As an educational program,
it brings the latest in environmental horticulture research to landscape
professionals, homeowners, business, community associations, and to other
government agencies. A variety of educational programs through the NEP
and Country Cooperative Extension Services explain and demonstrate best
management practices for Florida landscapes. Homeowners are enlisted in
the effort and are assisted in improving landscape design and maintenance
to increase native habitat, reduce the use of fertilizers and pesticides,
and conserve precious water supplies.
The National Estuary Programs created partnerships of area agencies,
governments, organizations and residents to analyze the problems associated
with residential landscapes and to create solutions. Also, because reducing
stormwater runoff pollution is an integral aspect of the Comprehensive
Conservation and Management Plans developed by the National Estuary Programs.
The University of Florida County Cooperative Extension Services provided
leadership and incorporated most of the information and practices needed
to educate those involved in properly maintaining yards and community
properties.
In Sarasota Bay, the NEP has worked with individual property owners and
schools; Tampa Bay NEP has focused on neighborhood associations; and the
Indian River NEP has worked with counties to assist in creating more environmentally-friendly
yards through landscape design, plant selection, fertilization and pest
management.
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Fish and Wildlife
Innovating Coastal Protection
Through Demonstration Projects
- Corpus Christi Bay applied treated bio-solids on a 25 acre plot
of aluminum mine tailings resulting in plant growth promotion,
wildlife habitat and improved water quality.
- Through a demonstration project, Peconic Bay NEP created a filter
strip to divert runoff from a highway on Shelter Island to a grass
retention basin, which is expected to improve water quality to
the extent that shellfish beds could be reopened.
- Through a demonstration project, a 2-cell wetland system was
created on a dairy farm in Tillamook Bay. The wetland receives
runoff from approximately 15 acres of pasture land where manure
is applied and dairy cattle graze. The first season's water quality
sampling had provided evidence of the benefits of constructed
wetlands in reducing pollutants to surface waters.
- The Corpus Christi Bay NEP is facilitating coordination between
Bay Shrimpers and the Texas Parks and Wildlife Department to develop
by-catch reduction devices for the Bay through a demonstration
project. This study is unique because of the coordination between
both groups and its location (prior studies have been conducted
in the Bays).
- Delaware Inland Bays has implemented a project to demonstrate
a Chlorophyll Meter to regional crop growers. Since it's important
not to apply more nitrogen fertilizer to the land than is needed
for the crop being grown, an instrument that can tell growers
what a crop's nitrogen needs are was tested. The Chlorophyll Meter
provides immediate results on nitrogen needs while being nondestructive
to the crop being sampled.
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Buzzards Bay
Restoring Fish Runs
Anadromous fish species like alewives and blueback herring have declined
dramatically during the past century in Buzzards Bay. These fish are an
important food species for fish, whales, and coastal birds such as the
roseate tern, an endangered species whose largest colony in North America
resides in Buzzards Bay. Today, many of the herring runs support a fraction
of their historical annual population. Physical constraints in the form
of dams, roadway construction, and other water control structures are
by far the greatest impediment to herring migration in Buzzards Bay. The
two drainage area river systems as top priorities for herring restoration
are the Mattapoisett and Weweantic. The Buzzards Bay Project worked with
the Massachusetts Division of Marine Fisheries to identify where anadromous
fish improvements are needed and provide the most benefit.
The existing culverts near the Mattapoisett River's headwater spawning
area were small in diameter and submerged. Because herring typically migrate
during daylight hours and lighted passages are required for migration,
the long darkened culverts present a significant obstacle to their upstream
migration. The solution to the problem was the replacement of the small
culverts with a single large box culvert, which would allow for more light
to reach the interior of the culvert and eliminate the existing obstacle
to migration. Near the river's mouth, the fishway at the dam restricted
upstream passage of alewives because it was too steep and turbulent. In
addition, water elevations at the dam required better management during
normal operating conditions and during herring run season. In order to
accomplish these goals a denil-type fish ladder was installed at the dam.
The Weweantic River currently has no significant population of herring.
The major spawning area on the river is a pond whose entrance is obstructed
by a dam. This was the single most important impediment to fish migration.
A denil-type fish ladder in the Weweantic is being constructed, and the
pond will be stocked with 5000 herring to boost the population. An educational
display will be created highlighting herring restoration efforts in the
Bay watershed to be used on a rotating basis in town halls, libraries,
and schools.
Massachusetts Bays
Restoring Shellfish Beds
Approximately 60% of shellfish beds in Massachusetts and Cape Cod Bays
are open to commercial and/or recreational harvesting. The remaining 40%
are closed or restricted in some form. The Massachusetts Bays Program
spearheaded an interagency approach to shellfish restoration that aims
to restore and protect shellfish beds in 12 communities along the shorelines
of Massachusetts and Cape Cod Bays. The Shellfish Bed Restoration Program
brought the regulatory and enforcement efforts of the State Division of
Marine Fisheries and local Boards of Health with the pollution source
identification, remediation, fundraising, and coordination skills of various
other Federal and State agencies. The Massachusetts Coastal Zone Management
Office helped facilitate a coordinated effort while the Massachusetts
Bays Program provided the seed funding, staff support, and a home for
the program.
The Project is addressing cleanup of shellfish beds in the communities
of Harwich, Falmouth, Plymouth, Kingston, Cohasset, Weymouth, Quincy,
Revere, Salem, Gloucester, Essex and Ipswich. Projects are focusing on
non-point source pollution, the major source of contamination to the shellfish
beds, especially discharges from storm drains. The Shellfish Bed Restoration
Program has incorporated innovative technologies which specifically target
remediation of contaminants associated with stormwater. Projects at Goucester
and Harwich highlight the use of a new non-point source remediation technology
which consists of a sedimentation basin, a series of filter screens, and
a constructed wetland to mitigate the pollution associated with stormwater
runoff.
The Shellfish Bed Restoration Program has had much success. In Cohasset
Harbor, the local Board of Health placed an enforcement order on a home
and business whose septic systems were polluting a tributary to the harbor.
The resulting remediation by the property owners allowed the opening of
approximately 400 acres of shellfish beds. With the help of a grant from
the Massachusetts Bays Program, the North and South Rivers Watershed Association
installed a sand infiltration system along a section of the river in the
Spring of 1995. Recently, 200 acres of downstream shellfish beds were
opened. The Massachusetts Bays Program contributed $15,000 toward the
monitoring costs of a sediment infiltration system to help reopen a shellfish
area in Barnstable. Since the system was installed, bacteria counts in
waters overlying the shellfish bed have dropped measurably. This project
has prompted the installation of similar systems in nearby communities.
Massachusetts Bays
Combating Bacterial Contamination of Shellfish
Shellfish beds are threatened by bacterial contamination in the town of
Duxbury, Massachusetts. Portions of the softshell clam beds at the mouth
of the Bluefish River were closed in 1984 and 1991 due to high fecal coliform
bacteria counts. Today, 85 acres remain closed containing an estimated
$244,000 worth of shellfish. The Bluefish River is a shallow mile-long
tidal river that drains into the northwest portion of Duxbury Bay. Mush
of the river is surrounded by marshes that the town had set aside for
wildlife conservation. The watershed also contains residential and light
commercial areas, all of which are potential pollution sources.
Researchers from the Massachusetts Division of Marine Fisheries walked
the shores and tested the waters of the Bluefish River searching for sources
of bacterial contamination. The researchers found that the highest concentration
of bacterial pollution were originating from three historic buildings
at the mouth of the river. The houses were built on filled salt marsh
which floods regularly, overburdening their septic systems and sending
sewage into the river. Because the houses were built on a salt marsh,
the owners could not hope to construct a septic system that would meet
minimum wetlands setback or groundwater separation regulations.
A local advisory committee comprised of representatives from Duxbury,
Kingston, and Plymouth received $32,000 from the Massachusetts Bays Program
to review a list of preferred alternatives and to design and bid the alternative
to eliminate the pollution and allow the town to reopen the shellfish
beds. The town of Duxbury chose to build a "shared" sewer/septic system
where effluent from the three buildings will flow down to a grinder pump.
The pump sends the ground-up sewage through a 2.5 inch pressure main to
a septic tank. A pressure dosing system will distribute effluent throughout
the leaching field.
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