One Karen Drive, Suite 2A | Westbrook, ME 04092 | 207.553.9898 | Walsh-Eng.com

Page 1 of 2

File: 514

December 24, 2019

Mr. Alexander Jaegerman

Town of Yarmouth

200 Main St

Yarmouth, ME 04096

RE:

Dear Alex,

In follow-up to the Planning Board meeting and meeting with Town staff for the subject project, we are

pleased to submit the enclosed minor revisions to the site plan materials. The following changes have been

made to the plans.

Clarification to FEMA Base Flood Elevation

The effective FEMA flood maps indicate that the 100-year base flood elevation (BFE) at the subject

property is at elevation 11 on the NGVD29 datum. However, the site plan provided for this project is on

the NAVD88 datum. On the previously submitted plan set the BFE was not converted to the NAVD88

datum, which is a change of approximately 0.7 feet. Therefore, the BFE of 11 on NGVD29 converts to

10.3 on NAVD88. FEMA rounds coastal flood plain elevations to the nearest foot. Therefore, the effective

BFE on the NAVD88 datum is 10. The BFE at elevation 10 on NAVD88 also correlates with the

preliminary FEMA flood maps issued in April 2017, which also identifies the BFE as elevation 10 on the

NAVD88 datum. The BFE has been corrected to elevation 10 on the plan set enclosed with this submission.

FEMA Floodway and Limit of Moderate Wave Action

At our meeting, Town staff requested that we review the flood maps to determine if the proposed

development falls within a floodway. On the FEMA flood maps, floodways are only defined within riverine

sections of the flood maps. In Yarmouth, the detailed study of the Royal River ends at the bridge under I-

295. The portion of the Royal River east of the bridge is considered a coastal flood zone, not a riverine

flood zone. Therefore, there is no defined floodway east of the bridge, which is where the project is located.

As such, the proposed development is not in a regulated floodway.

The preliminary flood maps identify a limit of moderate wave action (LiMWA) where waves are anticipated

to be less than 1.5 feet high landward of the LiMWA line. The proposed project is located approximately

3,500± feet landward of the LiMWA line, therefore, wave action is not considered to be a significant

concern at this location.

Fuel Tank

Following discussion with Town staff, the elevation of the fuel tank has been revised so that the bottom of

the tank will be no lower than the BFE at elevation 10. The tank will be anchored to a concrete pad to

Fuel System Project, Yarmouth Boat Yard, 72 Lafayette Street

Response to Town Comments

prevent floatation. Following site plan approval, a floodproofing certification will be provided with the

Flood Hazard Development permit application, which is required for any project within the flood zone.

Clubhouse and Project Phasing

The clubhouse will likely not be constructed at the same time as the construction of the fuel tank system

and shed. Due to challenges with posting a performance guarantee for only a portion of an approved project,

the clubhouse and associated utilities are identified as Phase 2. As discussed with Town staff, separate

performance guarantees will be paid for Phase I and Phase 2 construction.

At this time, it is unknown if the clubhouse will be constructed within the one-year expiration of the site

plan approval. Therefore, the Applicant is respectfully requesting that the site plan approval be extended

for one additional year so it does not expire for two years to allow for enough time for construction of the

clubhouse as Phase 2.

As requested by the Town, sewer and water services have been provided to the clubhouse on the plans.

Requests for ability to serve have been sent to the Yarmouth Sewer and Water Districts. Copies are enclosed

with this submission. An internal grinder pump system installed within the clubhouse will be used to keep

the pump system above the BFE.

Shed

The shed will be constructed with its lowest finish floor at elevation 11, which is 1 foot above the BFE. If

and when the clubhouse is constructed as Phase 2, the shed will either be connected to the clubhouse or

moved a minimum of 50 feet away from the clubhouse.

Please let me know if you have any questions. We look forward to discussing the project at the next

Planning Board meeting.

Respectfully,

Silas Canavan, PE

Walsh Engineering Associates, Inc.

cc: Steve Arnold, File

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One Karen Drive, Suite 2A | Westbrook, ME 04092 | 207.553.9898 | Walsh-Eng.com

December 24, 2019

Yarmouth Water District

PO Box 419

181 Sligo Road

Yarmouth, Maine 04096

RE: Request for Ability to Serve Letter

Yarmouth Boat Yard

72 Lafayette Street

Yarmouth, Maine 04096

Dear Mr. Gagnon,

Walsh Engineering Associates, Inc. (WEA) is requesting an “Ability to Serve” letter from the Yarmouth Water

District for the construction of a new 860± square foot clubhouse building at the Yarmouth Boat Yard located at 72

Lafayette Street in Yarmouth, Maine. The clubhouse will primarily be used seasonally by members of the Yarmouth

Boat Yard marina and will include one bathroom. The bathroom will function similar to a public restroom; therefore,

it is anticipated that the additional water demand will be approximately 325 GPD.

The water service to the new building will be provided by an underground ¾” line from the existing 6,500± square

foot building on the west side of the property. This building currently has both a domestic and fire service from

Lafayette Street. The new service to the clubhouse will be connected after the meter in the existing building.

A site plan is attached showing the existing and proposed buildings and water services.

Please contact me if you require any additional information.

Respectfully,

Silas Canavan, PE

Walsh Engineering Associates, Inc.

One Karen Drive, Suite 2A | Westbrook, ME 04092 | 207.553.9898 | Walsh-Eng.com

December 24, 2019

Tom Connolly, Superintendent

Yarmouth Wastewater Department

tconnolly@yarmouth.me.us

RE: Request for Ability to Serve Letter

Yarmouth Boat Yard

72 Lafayette Street

Yarmouth, Maine 04096

Dear Mr. Connolly,

Walsh Engineering Associates, Inc. (WEA) is requesting an “Ability to Serve” letter from the Yarmouth Wastewater

Department for the construction of a new 860± square foot clubhouse building at the Yarmouth Boat Yard located at

72 Lafayette Street in Yarmouth, Maine. The clubhouse will primarily be used seasonally by members of the

Yarmouth Boat Yard marina and will include one bathroom. The bathroom will function similar to a public restroom;

therefore, it is anticipated that the additional sewer demand will be approximately 325 GPD.

An internal grinder pump will be installed inside of the clubhouse so the pump will be above the base flood elevation.

A force main will be installed underground and connected to the existing sewer service to the 1,800 square foot

building at the southwest corner of the property. A cleanout will be installed between the new service connection

wye and the existing building.

A site plan is attached showing the existing and proposed buildings and sewer services.

Please contact me if you require any additional information.

Respectfully,

Silas Canavan, PE

Walsh Engineering Associates, Inc.

EXTERNAL UN

ITS - SPECIFICATION

SHEET

SANIGRIND PRO • Part No. 014

TECHNICAL SPECIFICATIONS

The Sanigrind Pro is a 1 HP pump system used to install a complete bathroom up to 25 feet below the sewer line, or even up to 150 feet away from a soil stack. It incorporates a grinder system which is ideal for uncontrolled environments in both residential and

commercial applications (ie. rental unit, offices, warehouses, etc). The Sanigrind Pro is designed to handle sanitary products that may have been flushed down the toilet; such may consist of condoms, sanitary napkins, q-tips, dental floss, etc.

Discharges the waste through a 3⁄4" or 1" rigid pipe. A non-return valve is included on the discharge elbow assembly provided with the system. This elbow can be rotated 360 degrees depending on the discharge installation.

Has been designed with a 11⁄2" vent connection on the top of the lid. All plumbing codes require connection to a vent system. Please note that the vent system should be a two-way air vent as air needs to freely flow both ways. Note: The use of mechanical vents, air admittance valves or similar devices is not permitted.

This pump is designed to be connected to any conventional toilet with a bottom outlet (not supplied by Saniflo). Note that there should be a minimum 1⁄4" per foot gravity fall on the waste pipe coming from the toilet into the pump.

Will also discharge gray water from any sink, bath/shower, urinal and even a washing machine (indirect connection). The wastewater will drain into the system via two 2" inlets with built-in check valves on either side of the housing. Note that when adding a bathtub/shower, the base should be raised up by a minimum of 8" off the floor.

An easy access service panel is located on top of the pump. This will give you easy access to the electrical components such as the capacitor, microswitch, electronic board and membrane. For a full list of parts, please refer to the next page.

FULL VIEW OF COMPLETE BATHROOM CLOSE-UP VIEW OF PRODUCT

Pump type: GrinderElectrical: 120 V – 60 Hz / 9 Amps (Max)

Motor: 1 HP oil-filled thermally protected motorCapacitor rating: 60 microfarad

Operating Temperature: 104°F (110°F Max.)Power cord length: 49 inches

Noise level: ≤ 63 dBA (Lp) (measured at 3 ft.)

Grinder

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PLEASE CALL US TOLL-FREE AT 800-571-8191 (US) / 800-363-5874 (CDN)TO PURCHASE PARTS REFERENCED ABOVE

FOR ADDITIONAL TECHNICAL QUESTIONS, PLEASE CALL 800-571-8191

USE ANY CONVENTIONAL TOILET TO COMPLETE YOUR BATHROOM INSTALLATION

There are no limitations when it comes to designing your bathroom around the Sanigrind Pro (014) system as you can select any

conventional toilet of your choice.

Mix and match your fixtures (shower, bathtub, sink) from other brands to complete your installation.

The unit can either be installed on top of the floor while the rest of the fixtures are installed on a raised platform or you can lower the

pump eliminating the need to create a subfloor.

60 70 80 90 100 110 120 130 140 150

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Discharge pipe diameter: 3⁄4" or 1"Discharge rate at 25 ft: 19 GPMDischarge rate at 3 ft: 38 GPM

Shut-off head: 38 ft.Normal running time: Depends of toilet system

Capacity: 3.2 gallonsInlets: 2" (sides), 11⁄2" vent (top)

Method of activation: Membrane/microswitchShower/bathtub base height: 8" min

Weight: 30 lbs.Certifying agencies: CSA (IPC, NSPC), IAPMO (UPC)

Recommended accessories: Descaler, SanialarmConnections: Bottom outlet toilet, sink, shower/bathtub,washing machine (indirect connection via laundry sink)

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