Instructions for Completing the Shoreland Application Worksheet

Always ensure you’re

using the most current

version of the permit

application form.

3

Determine the Pre-Construction Impervious Area

of the lot within the Protected Shoreland

Determine the area of the primary structure including all roof overhangs and attached decks. Include all gravel driveways and

walkways.

Include all parking areas, walkways and stairways.

Determine the areas of all accessory structures such as sheds, patios, gazebos, walkways and stairs.

Separate each structure/

impervious area as best

possible.

Total Pre-Construction

Impervious Area within

the Protected Shoreland

Determine the area of

each Structure/

Impervious Area within

the Protected Shoreland

6

Determine the area of the new, larger primary structure. Include roof overhangs and attached decks.

Determine the Post-Construction Impervious

Area of the lot within the Protected Shoreland

Notice the removal of a shed.

Include all gravel driveways and walkways.

Include all parking areas, walkways and stairways.

Determine the areas of all accessory structures such as sheds, patios, gazebos, walkways and stairs.

Total Post-Construction

Impervious Area within

the Protected Shoreland

Total Area of the lot

within the Protected

Shoreland

.46 Acres =

approximately 20,000

square feet

There are many tools to

convert acres to square

feet on-line.

Percentage of the lot

within the Protected

Shoreland covered by

Pre-Construction

impervious Area.

Percentage of the lot

within the Protected

Shoreland covered by

Post-Construction

impervious Area.

If the post-construction impervious area exceeds 20% or increases on a lot that had a pre-construction impervious area greater than 20%, but does not increase more than 30%, a stormwater management system must be designed and implemented to treat the increase in stormwater from development.

If the post-construction impervious area exceeds 30% or increases on a lot that had a pre-construction impervious area greater than 30%, a stormwater management plan must be designed and certified by a professional engineer to treat the increased stormwater from development; AND

The applicant must ensure that each waterfront buffer grid segment at least meets the minimum required tree and sapling point score. If any grid segment does no meet the minimum required point score, applicants must provide a planting plan to demonstrate how each deficient grid segment will be planted with additional vegetation so that it at least meets the minimum required point score.

* Lots that have a pre-construction impervious area greater than 20% or 30% and propose a post-construction impervious area less than the pre-construction impervious area are not required to implement stormwater management systems or address tree and sapling point score deficient waterfront buffer grid segments.

** All projects that propose an impervious area greater than 30% are considered nonconforming and, upon completion of the proposed project, must become “more nearly conforming” in accordance with RSA 483-B:11.

This project requires a

stormwater management

plan because the post-

construction impervious

area has increased and it’s

greater than 20% but, less

than 30%.

Reference line

50 feet

150 feet

250 feet

Calculating the Area to Remain in an “Unaltered

State”.

“Unaltered State” means vegetation, including

ground cover and the leafy duff layer, allowed to

grow without cutting, limbing, trimming, pruning

and mowing or other activities except as needed

for plant health and maintenance.

Reference line

50 feet

150 feet

250 feet

The “Unaltered State” requirement pertains to the vegetation removal limitations between 50 feet and 150 feet from the

reference line.

25% of this area must remain in an

“unaltered state.”

Lawn is an altered surfaceLawn is not considered “unaltered area.”

The area above the red line is

considered “unaltered area”.

Reference line

50 feet

150 feet

250 Feet

Provided 25% of the area between 50

feet and 150 feet remains unaltered, it

is permissible to allow multiple areas

to remain in an unaltered state.

15%

10%

Determining the Values of Sections “F” and ”G”.

Reference line

50 feet

150 feet

250 feet

Determining the Value of Section “F”

In this example, the yellow area is the only region that exists in an

“unaltered state.” The area shaded in yellow = 2,000 Square.

This is the value of “F”

In this example, the yellow area is

the only region that exists in an “unaltered state.” The area

shaded in yellow = 2,000 Square

Feet. This is the value of “F”

Reference line

50 feet

150 feet

250 feet

Determining the Value of Section “G”

In this example, the area shaded light green is the total

area of the lot between 50 feet and 150 feet from the reference

line. The area shaded light

green = the value of “G”

In this example, the area

shaded light green is the total area of the lot between 50 feet

and 150 feet from the reference

line. The area shaded light green = the value of “G”

[.25 x 10,000 SF = 2,500 SF]

[.25 x 0,000 = 2,500]

The smaller of line (F) and line

(H) = 2,000 Square Feet. This is the minimum area between 50

feet and 150 feet from the

reference line that must remain in an unaltered state.