HomeMy WebLinkAbout10/14/2024 - Watershed Special Permit Application - - 314 SALEM STREET WATEfZSHED
SPECIAL PER1VIIT
PROJECT DESCRIPTION &
SUPPORTING DOCUIVIENTATION
FOR
THE PROPERTY AT
314 SA M STREET
NORTH AND O�l�R, MASSACHUSETTS
PREPARED FOR
DAA1ID PICKLES
314 SA M STREET
NORTH ANDOVER, NIA 01845
BY
DAVID R. $DTI, P'E'
PFS LAND SURVEYING, INC.
20 BALCH AVENUE
GROVELAND., NIA
OCTOBER 1412024
OVMVIEW
The proposed addition project is located at 314 Salem Street and is depicted on
North Andover Assessors Map 37.B Lot 68. The parcel consists of 30,183t square
feet of land and is located on the northerly side of Salem Street at the
intersection of Appleton Street. The proposed addition is over 400 feet from Lake
Cochichewick, but within the Watershed Protection District.
The lot was created in 1980, pre-dating the October 24, 1994 implementation of
the bylaw. The proposed addition is outside of the 250 foot Non-Disturbance
buffer and the 325 foot Non-Discharge buffer from the mean annual high water
of Lake Cochichewick. A wetland resource area exists at the west corner of the
parcel, northwest of the proposed work, and existing flagging was confirmed by
North Andover Conservation Commission, and located by this firm.
The proposed addition is within 325 foot Non-Discharge buffer to a wetland
resource within the Watershed protection District, and 99-feet from the edge of
the bordering vegetated wetland, as located by this firm. The proposed addition
involves the construction of a 6'x30'farmer's porch, located at the front of the
existing house.
The lot is served by a municipal sewerage system so nitrogen and phosphorus
contributions to the groundwater will be minimal and typical of surrounding
residential uses. It is anticipated that permit approval will require that fertilizers
to be organic and slow release, free of phosphorus further minimizing chemical
impact to the groundwater.
No perennial streams are shown on or near the lot according to the USGS
Massachusetts StreamStats program and the North Andover Riverfront Map.
No wetland area will be disturbed as part of the proposed work.
A copy of the Estimated Habitat Map is not attached as there are no estimated
habitats of rare wetlands wildlife or certified vernal pools on or near the lot
according to the Natural Heritage and Endangered Species Program web site
dated August 1. 2021.
A copy of the Flood Insurance Rate Map is attached. The parcel is not in the
floodplain per Flood Insurance Rate Map 25009CO236F, dated July 3, 2012.
Soils on the lot were mapped by the USDA Natural Resources Conservation
Services (NRCS) as predominately Sutton Fine Sandy Loam, 0% to 3% slopes,
and are moderately well-draining.
0WIER MMA GENBEff
Existing conditions present a gently sloping side yard, northwesterly towards the
wetlands and brook, and is presently without stormwater measures.
Since the project consists of work on a single family house, the project is exempt
from the MA DEP Stormwater Management Standards.
Stormwater remediation for the site is proposed by the conveyance of all runoff
from the proposed rooftop into a 2-foot diameter leaching catch basin, at a depth
of 2-feet. The basin will be encased in a 12-inch width of clean, crushed stone,
and wrapped in polyethylene filter fabric
During construction, the perimeter of the work will be protected with staked
erosion barrier products to prevent migration of sediment from the site until final
stabilization.
This BMP has been proposed to manage 20.1 cubic feet of stormwater runoff
and to mitigate upwards of the 100-year, 24-hour intensity storm.
LAnSCAPING
All downgrade disturbed areas are proposed to be stabilized with loam and seed.
SUPPORTING DOCUMENTATION
1. Encourage the most appropriate use of land
The proposed use of a farmer's porch at a single family dwelling is appropriate as
the site is located within the R3 zoning district and porches are common
appurtenances on single family properties.
2. Preventing overcrowding of land
The proposed work complies with the required zoning setbacks and is a 6'x30'
farmer's porch. The porch shall be located in the front of the existing house.
3. Conserving the value of land and buildings
The proposed project should enhance the value of the property and provide
additional recreational value for the residents.
4. Lessening congestion of traffic
The proposed project will not increase the average daily traffic to or from the lot
and the existing driveway is sufficient to accommodate this project.
5. Preventing undue concentration of population
The proposed porch is an enhancement to a developed lot with an existing single
family home which will not typically concentrate population.
6. Providing adequate light and air
The completed project will not adversely impact the light or air quality of the
surrounding areas.
7. Reducing the hazards from fire and other danger
The proposed project will not pose any hazards from fire or other danger.
8. Assisting in the economical provision of transportation, water, sewerage,
schools, parks, and other public facilities
The porch addition will not negatively impact the public facilities or utilities noted
above.
9. Controlling the use of bodies of water, including watercourses
The proposed project is on a lot that does not directly abut Lake Cochichewick
and will not have any impacts on present use of the Lake or its tributaries.
10. Reducing the probability of losses resulting from floods
The property is not within a floodplain reducing the probability of the work
causing damage and loss.
11. Reserving and increasing the amenities of the Town
The proposed project will result in an improvement to the property and increased
property tax which will help to increase funds available to the Town for public
amenities.
PROOF 0F NO REASONABLE ALTERNATIV£LOCATION
The addition is proposed in an optimal location for the use of the lot.
EVIDENCE OF APPROVAL FROM MASS DES
No approval from Mass DEP is required for any industrial wastewater treatment
or disposal system or any wastewater treatment for a system of fifteen thousand
gallons per day capacity as none arc proposed.
EVIDENCE ON SITE OPERATIONS WILL NOT CREATE CONCENTRATIONS OF
NITROGEN IN GROUNDWATER GREATER THAN THE FEDERAL LIMITS DOWN
GRADIENT OF THE PROPERTY
The construction of the proposed addition will employ all the best management
practices suitable for a farmer's porch concerning erosion and stormwater
control. Sediments will be managed by installing an erosion control barrier to
keep sediments from entering the downhill wetland. The addition is not a source
of nitrogen and phosphorus so there will be no increases in nitrogen
concentrations downgradient of it.
PROJECTIONS OF DOMAIN GRADIENT CONCENTRATIONS OF NITROGEN,
PHOSPHORUS,AND OTHER RELEVANT CHEMICALS AT PROPERTY BOUNDARIES
The proposed addition will not create concentrations of nitrogen or phosphorus,
or other relevant chemicals, at the property boundaries.
WRITTEN CERTIFI CATI 0 N
I. David R. Beati certify that the work depicted on the Plan titled "Stormwater
Remediation Plan N 314 Salem Street North Andover MA, dated October 14,
2024, prepared by PFS Land Surveying, LLC will not result in the significant
degradation of the quality or quantity of water entering Lake Cochichewick.
David R. Beati, MA P.E. #45419