Sōlitude Lake Management

April 30, 2019

Mr. David J. Rousseau, Director NH Division of Pesticide Control P.O. Box 2042 Concord, NH 03302-2042

Re: 2019 Special Permit Application – Namaske Lake, Goffstown, NH

Dear Mr. Rousseau:

Please accept this as the 2019 Special Permit Application for the proposed treatment of portions of Namaske Lake in Goffstown. The project applicant is the Namaske Lake Association. The project is being performed in accordance with the Long-Term Variable Milfoil Management Plan (LTMP) for Namaske Lake.

We propose the treatment of the infested littoral areas (up to 40 acres) of Namaske Lake in mid to late July or early September 2019. The final treatment areas will be determined by a spring inspection by NH DES.

Enclosed is the complete original special permit application. An exact digital (PDF) copy of the permit application, inclusive of cover letter, permit application, project description, all maps, well information, abutter information, a copy of the NH DES Long-Term Management Plan, NHB Review and any relevant herbicide labels have been uploaded to the NH Secure file Exchange Server.

Notice of the submittal of this Special Permit application will be mailed to all abutters and riparian owners on May 6, 2019. A legal notice will also be published in the Union Leader on May 2, 2019. Copies of both notices are attached to the permit application.

We trust that this Special Permit Application is complete and that the review process will be initiated. We would ask that you contact us at your earliest convenience for additional information requests or questions

Sincerely, SŌLITUDE LAKE MANAGEMENT

Marc Bellaud President / Aquatic Biologist cc: Mike Allard, Namaske Lake Association Amy Smagula, NH DES (via email)

590 Lake Street, Shrewsbury, MA 01545 | 508-865-1000 | SŌLITUDELAKEMANAGEMENT.COM Form A 1

Application No:______SP APPLICATION-Aquatic Date Received:______Page 1 of 10 07/15

Special Permit Application Form - Aquatic NH Division of Pesticide Control PO BOX 2042 Concord NH 03302-2042

09/2014

OFFICE USE ONLY

Referred to: Approve Disapprove Signature Date Dept. Environ. Services ______Dept. Res. & Econ. Dev. ______Fish & Game Department ______State Entomologist ______Division Public Health ______Div. of Pesticide Control ______Check Here if there are attached comments or conditions, or use space below Comments:______

APPLICANT INFORMATION PLICANT INFORMATION 1. Name of applicant: ______Address:______City: ______State: _____ Zip: ______Tel: ______Fax: ______Cell*:______Pesticide License #______

2. Name of contact on behalf of the applicant: ______Tel: ______Cell*:______E-mail*:______

3. Licensed pesticide applicator (if other than individual or entity named on 1. above): Name:______Address: ______City: ______State: _____ Zip: ______E-mail:______Tel: ______Fax: ______Cell*:______Pesticide License #______

* = Optional

Form A 1

SP APPLICATION-Aquatic Page 2 of 10 07/15 4. Client on whose behalf the application is being made if other than 1., 2. or 3. above: Name:______Address: ______City: ______State: _____ Zip: ______Tel: ______Fax: ______E-mail*:______

5. Contact or spokesperson for the client requesting pesticide treatment: Name:______Title: ______Tel: ______Cell*:______E-mail*:______

6. Have there been any previous special permits issued to conduct treatments at this site (whether or not pesticide was actually applied)? Yes No If Yes list permit number and year of most recent permit: Permit #: SP#______- Year: ______

7. Is there a Long-Term Management Plan (LTMP) in place for this location or project? Yes No If Yes specify name of plan, the month and year of issue or most recent amendment, and attach a copy to this application:

Name: ______

Issue/Amendment Date: ______LTMP Attached: Yes No

8. Have there been alternative (to pesticide) control methods used at this site? Yes No . If Yes describe and include dates. If No briefly specify reason(s). If this information is in an attached LTMP skip “a” and check “b” below: a. Alternative Controls or Reasons Not Employed: ______

b. See Attached LTMP

9. Names and address of all abutters: ATTACH LIST

10. Names and address of all persons utilizing the waters for domestic purposes: ATTACH LIST

Form A 1

SP APPLICATION-Aquatic Page 3 of 10 07/15

11. Names and address of all persons who have made known their objections to the treatment through written or verbal communication with the applicant: ATTACH LIST

12. Description and Map of Treatment Area:

a. Overall description of treatment area(s) [if multiple sites list all, reference to map, and indicate acreage of individual site(s)]: ______

b. Specific information regarding treatment area(s):

(1) Overall length along the shoreline: ______FT (2) Width outward from the shoreline: ______FT (3) Average depth: ______FT (4) Total treatment area (total): Surface Acres: ______Acre Feet: ______(5) Type of Bottom: ______(6) Are any parts of the proposed treatment area places where watercraft congregate for recreational use such as boat rafting, water skiing, riding of personal watercraft or similar activities? Yes No If Yes, indicate the location(s) of the nearest public and private boat ramps on accompanying map(s). (7) If there are multiple treatment area sites, list all sites referenced to the map with acreage of each individual site.

Form A 1

SP APPLICATION-Aquatic Page 4 of 10 07/15 c. Attach a map (scale 1” = 800 to 1000ft.) showing the treatment and surrounding areas and indicate locations of:

(1) Depth findings in the treatment area; (2) Riparian owners, abutters, and others affected by the treatment; (3) All inlet and outlet streams labeled as to whether the stream is inlet or outlet; (4) Bathing areas; (5) Base of operations; (6) Sampling sites; (7) Public and private wells and surface water supplies, including intakes, that use the water for domestic purposes; (8) Downstream use of water.

13. State the reason and need for pesticide application, including a statement as to whether a proposal is consistent with a current long-term management plan, if one exists, for the water body. Where the proposed treatment is not consistent with said long-term management plan, description of how the proposal deviates from said plan and the reason for such deviation: ______

14. Can the water level be controlled? Yes No If Yes, describe how?: ______

15. List the names of the predominant species of game fish know to be present: ______

Form A 1

SP APPLICATION-Aquatic Page 5 of 10 07/15 16. Attach the Natural Heritage Bureau Report and list of threatened and endangered species relative to the treatment if identified.

17. Water use by abutters and those not contiguous to the treatment area, including the following information:

a. Name(s), Public Water Supply Department of Environmental Services Identification # (PWS ID #), location, and distance to a proposed treatment area of any public water supply wells whose wellhead protection area(s) extend into a proposed treatment area, and the distance to the proposed treatment area: ______

b. Name and location of any private water supply intakes and wells within 50 feet of a proposed treatment area and the distance to the reference line that is closest to the proposed treatment area: ______

c. A description of bathing uses, including locations relative to treatment area:

______

d. A description of livestock watering and other agricultural uses and locations relative to the treatment area:

______

Form A 1

SP APPLICATION-Aquatic Page 6 of 10 07/15

18. Use of outlet waters, including:

a. Names, Public Water Supply Identification Number(s) (PWS ID #), and location of sources of public water supplies within 1,000 feet of the outlet waters and less than 5 miles downstream of the treatment area: ______

b. Location of nearest point downstream where waters are used for bathing: ______

c. Location of nearest point downstream where waters are used for residential or agricultural irrigation, watering livestock and for other agricultural uses: ______

19. Objections by persons who may be subject to water use restrictions.

a. Has the approval of persons who may be subject to water use restrictions as a consequence of this proposal been sought? Yes No

b. Have any such persons expressed objections to the proposal? Yes No

c. Where approval could not be obtained or was not granted, please state the reason(s) that approval was not obtained and describe the nature of and reason for any objection, where such information is known to the applicant and attach copies of any written objections that might have been directed to the applicant: ______

Form A 1

SP APPLICATION-Aquatic Page 7 of 10 07/15

20. List the method(s) of notification to abutters and others directly affected by the treatment to include persons who enter the treatment area by watercraft, including:

Newspaper Direct Mailing Other

With regard to the above, please indicate: (1) Date any direct notices were mailed: ______(2) Names of any newspapers in which notice was published: ______(3) Date(s) of any notices provided:______(4) A description of any method used for notification other than newspaper or direct mailing, along with the date of such notice: ______

ATTACH a copy of the notice, news releases and direct mailings

21. Description of Pesticide Application:

a. Target organism(s): ______

b. Method(s) of treatment: ______

c. Name(s) of pesticide(s) with EPA Registration Number(s) of the product(s) with a list attached if necessary: ______

ATTACH Labels of Pesticides to be used.

d. Rate(s) of Application: ______

Form A 1

SP APPLICATION-Aquatic Page 8 of 10 07/15 ______

e. Amount to be used: ______

f. Date(s) of pesticide application(s): ______

g. Sequence of pesticide application(s): ______

(1) Number of blocks or acres to be treated:______(2) Acreage of each: ______

h. The method of posting treated area: ______

i. The planned concentration of pesticide to be present in the waters after treatment: ______

j. The person who will be collecting the samples including:

a. Name:______

b. Affiliation:______

c. Narrative to included one of the following:

i. Experience of water sampling on behalf of a lab accredited by NHELAP: ______

Form A 1

SP APPLICATION-Aquatic Page 9 of 10 07/15

ii. Experience as a volunteer water quality monitor trained by NHDES: ______

iii. A description of water sampling experience: ______

iv. A description of water sampling training: ______

k. Laboratory conducting required analysis:

Name:______Street: ______City: ______State: _____ Zip: ______Fax: ______E-Mail: ______

l. If treatment is proposed in surface waters or its tributaries within five miles upstream of an intake used for public water supply, include the following:

(1) Data as to the anticipated impact to said water supply, including but not limited to such information as:

(a) Estimates of the dispersion and dilution of the pesticide over time; (b) Flow characteristics; (c) Anticipated maximum concentration of pesticide at the affected public water supply intake(s) (d) An estimate of the time, post treatment, when the maximum concentration of pesticide would be anticipated

APPLICANT AND APPLICATOR SIGNATURES

By the signature below you are certifying that the information on this form is true and correct to the best of your knowledge and belief. Furthermore, the applicant assumes full responsibility for any damage resulting from inaccuracies in the information provided on the application form, miscalculations, improper applications of chemicals and failures on the part of the applicant to gain the approval of, or accommodate the objections of

PROCELLACOR Permit App Dose Calculation Sheet INDIVIDUAL SITE MEASUREMENTS (change blue numbers) TRT LABEL: Oz. of TRT Area AOI Avg % of WB Target Total 1 PDU = Procell Lake: NAMASKE LAKE 2019 Prescription Dose Units (PDU**) per acre‐foot of water SITE (ac) (ac) Dpth Acre/Feet Treated PDU PDUs 3.17 oz (per site) Location: Goffstown, NH Percent Area of Target Milfoil Species A 40.00 140.0 5 200.0 29 3 600 x 3.17 1902.0 A Waterbody Treated Variable Eurasian B 5 0.0 #DIV/0! 0 x 3.17 0.0 B Permit App Procellacor Usage Calculation ≤ 2% 3 - 5 3 - 4 C 5 0.0 #DIV/0! 0 x 3.17 0.0 C >2 ‐ 10% 3 - 4 2 - 3 D 5 0.0 #DIV/0! 0 x 3.17 0.0 D Target Plant: V. Milfoil >10 ‐ 20% 2 - 4 1 - 3 E 5 0.0 #DIV/0! 0 x 3.17 0.0 E >20 - 30% 2 - 3 1 - 2 F 5 0.0 #DIV/0! 0 x 3.17 0.0 F Treatment Acres (Management Area): 40.0 up to >30% 1 - 2 1 - 2 G 5 0.0 #DIV/0! 0 x 3.17 0.0 G Acre/Ft 200.0 H 5 0.0 #DIV/0! 0 x 3.17 0.0 H Average Depth of Treatment Area (feet): 5.0 ft *1 PDU contains 3.17 fl. oz. of product 3.17 oz in 1 PDU I 5 0.0 #DIV/0! 0 x 3.17 0.0 I PDU = Prescription Dose Unit 128 oz in 1 gal J 5 0.0 #DIV/0! 0 x 3.17 0.0 J Size of Area of Interest (AOI): 140.0 ac K 5 0.0 #DIV/0! 0 x 3.17 0.0 K L 5 0.0 #DIV/0! 0 x 3.17 0.0 L Percent Area of Waterbody to be Treated: 29 % M 5 0.0 #DIV/0! 0 x 3.17 0.0 M TTL: 40.0 140.0 200.0 estimated PDUs: 600 * Target Acre/Foot PDU: 3 to 2 TOTAL OZ of PROCELL: 1,902 14.9 gal Total Estimated PDU: 600.0 * Rate of Application: 9.51 to 6.34 oz/ac‐ft (3‐2 DPU)

Total Ounces of Procellacor: 1,902 oz or *As treatment areas get reduced/change, the PDU rate may increase or decrease, 14.9 gal due to the changing Percent of Waterbody treated (Acreage and Area of Interest (AOI)) The Total PDUs is an estimate. It will likely be equal to or lower than the estimate, but there may be some instances that it is higher

INSERT TREATMENT MAP

4/29/19… 3:55 pm

ATTACHMENTS

2019 SPECIAL PERMIT APPLICATION – AQUATIC Namaske Lake, Goffstown / Manchester

. Project Description

. Figure 1: USGS Topo Site Locus Map

. Figure 2: Potential 2019 Treatment Areas Map

. Figure 3: DES Potential Treatment Areas 2019 Map

. Figure 4: DES Bathymetry Map

. Figure 5: DPC Well-PWS Map

. OneStop Program GIS – 5-Mile Outlet PWS Maps / Info

. OneStop Program GIS – Water Well Inventory and Public Water Supply Sources 2019

. Copy of Legal Notice

. Copy of Abutter Notice

. Abutter List

. Tax Maps

. Natural Heritage Bureau Review- NH19-0446 (print copy with original; PDF provided) . Herbicide Label for: Procellacor EC (Florpyrauxifen-benzyl liquid) (print copy with original; PDF provided)

. Long-Term Variable Milfoil Management Plan for Namaske Lake – prepared by DES (print copy with original; PDF provided)

590 Lake Street, Shrewsbury, MA 01545 | 508-865-1000 | SŌLITUDELAKEMANAGEMENT.COM PROJECT DESCRIPTION: 2019 SPECIAL PERMIT APPLICATION – AQUATIC Namaske Lake, Goffstown / Manchester

Namaske Lake is located in Goffstown and Manchester, immediately north of Route 114A and south of Goffstown Road. The Lake is located to the northwest of Pinard Street. Invasive variable milfoil (Myriophyllum heterophyllum) infests portions of the littoral zone of Namaske Lake. Treatment of up to 40 acres is proposed for 2019, as part of the Long-Term Management Program.

Project Applicant: Namaske Lake Association (NLA) – in cooperation with the NH Department of Environmental Services (DES) Applicator/Lake SŌLITUDE LAKE MANAGEMENT - License # S-2230896 Manager: Marc Bellaud, President Program Objectives: To control non-native and invasive aquatic weed growth, specifically variable milfoil (Myriophyllum heterophyllum), to preserve and enhance water quality and fish and wildlife habitat. The NLA plans to practice an integrated management approach utilizing selective herbicide treatments, benthic barriers and diver hand-pulling.

Lake Description: . 192.5 acres (open-water areas) (reported by DES) . 5.28 foot average depth reported . 25.41 foot maximum depth . Flushing rate = 311.3 times/year . Targeted invasive species: variable milfoil . Outlet - flows south/southeast, out of the southeastern outlet cove; dam

Treatment History: *See LTMP for treatment history Proposed Herbicide: Procellacor EC (Florpyrauxifen-benzyl) herbicide is proposed for use at Namaske Lake in mid to late July or early September 2019.

Procellacor EC (Florpyrauxifen-benzyl liquid); 2.7% active ingredient, EPA Reg. No. 67690-80 . 3 PDU per ac-ft rate (9.51 oz/ac-ft) is proposed @ 5 ft avg depth

Reasoning for Procellacor™ EC received full EPA registration in 2018 and we had great success with the Herbicide Selection: treatments performed last year, so we would like to use Procellacor EC at more sites in 2019. Procellacor EC is a reduced risk herbicide with shorter restriction times than previously used herbicides.

We feel that Namaske Lake will be an excellent site to use Procellacor EC herbicide.

Treatment Plan: . An area-selective application is proposed in Namaske Lake, of up to 40 acres, with up to 600 PDUs (14.9 gallons) of Procellacor EC, for on or about July 22nd or early September 2019, to target variable watermilfoil. . Hand-pulling may be attempted on areas that are too sparse to treat. Water Supply: . There are a few private wells within 50 feet and no intakes within 200 feet of treatment area. Abutters have been asked to contact SLM with updated well and intake information. . There are no public wells within the required calculated setback distance from the treatment areas according to the NH GIS OneStop website. . There is one public water supply well within 1000 feet of the outlet "stream", within 5 miles of the treatment area, according to NH DES OneStop website.

Rare, Threatened or 2019 NHB Review- NHB19-0446: Endangered Species Impacts: . Rare, Threatened or Endangered Species located within or near the treatment areas: Blanding’s Turtle, Northern Black Racer . No negative impacts are anticipated from proposed treatment program to the species of concern (see LTMP) . The applicator will proceed with appropriate caution and follow the NH F&G Treatment Recommendations / Requests for the relevant species listed, in order to avoid causing undue harm.

590 Lake Street, Shrewsbury, MA 01545 | 508-865-1000 | SŌLITUDELAKEMANAGEMENT.COM Inlet

Inlet Inlet

SITE

F L OW

Outlet

Legend: SOLITUDE LAKE MANAGEMENT 590 LAKE STREET Namaske Lake SHREWSBURY, MA 01545 Goffstown, NH PHONE: (508) 865-1000 Map Source: SOLITUDELAKEMANAGEMENT.COM http://www.esri.com/data/basemaps.html Site Locus Map

FIGURE: SURVEY DATE: MAP DATE: 0 1,000 2,000 4,000 Feet 1 ------Area D Area B 9.3 acres 6.43 acres Herbicide Residue Sampling Site: Area E TBD after Treatment 3.36 acres Areas are finalized Area C 7.15 acres Area V Area A 1.39 acres 1.51 acres Area F 13.87 acres Area U 7.98 acres Area G 2.51 acres Area R 1.31 acres Area J Area H 4.50 acres 2.08 acres Area Q 0.43 acres Area T Area S 0.80 acres 2.61 acres Area K Area L Area I 5.68 acres 3.07 acres 1.49 acres

Area P 0.31 acres Area O Launch Site & 0.24 acres Base of Operations

Area N Area M 0.56 acres 0.33 acres

Legend: SOLITUDE LAKE MANAGEMENT Namaske Lake 590 LAKE STREET SHREWSBURY, MA 01545 Goffstown, NH PHONE: (508) 865-1000 Potential Treatment Areas (up to 40 acres total) SOLITUDELAKEMANAGEMENT.COM 2019 Potential Treatment Area Map

FIGURE: SURVEY DATE: MAP DATE: 0 1,000 2,000 4,000 Feet 2 2018 4/29/19 Namaske Lake Goffstown/Manchester

Legend ± Namaske_Lake_2019_Potential_Treatment_Areas

0 0.25 0.5 Miles

***2019 HERBICIDE TREATMENT BID NOTE***

PLEASE PROVIDE A BID FOR PERFORMING AN HERBICIDE TREATMENT IN 2019 AS OUTLINED BELOW:

TARGET SPECIES: VARIABLE MILFOIL TREATMENT ACRES: UP TO 40 ACRES PRODUCT: PROCELLACOR WITH NAVIGATE ALATERNATIVE MEAN DEPTH OF TREATMENT AREAS: 5 FEET TREATMENT DETAIL: EARLY JUNE OR EARLY FALL 2019

TREATMENT AREAS MAY BE SMALLER THAN THE FOOTPRINT SHOWN, AND WILL BE FINALIZED BASED ON FIELD SURVEYS PRIOR TO TREATMENT. NOTE THAT BOTH KNOWN AND POTENTIAL TREATMENT AREAS MAY BE DELINEATED ON THIS MAP.

PLEASE PROVIDE PRODUCT OPTIONS AND APPLICATION RATES THAT YOU DEEM APPROPRIATE FOR THIS SITE, AS WELL AS A LINE-ITEM BUDGET SHOWING PROJECTED COSTS.

BIDS ARE DUE AT NHDES, CARE OF AMY SMAGULA AT [email protected] BY FRIDAY NOVEMBER 9, 2018. NAIP, GRANIT Figure 4: Bathymetric Map 063,000 ,00012,000Feet

Legend: SOLITUDE LAKE MANAGEMENT Namaske Lake 590 LAKE STREET Potential Treatment Area (up to 40 acres) SHREWSBURY, MA 01545 Goffstown, NH PHONE: (508) 865-1000 Wellhead Protection Area SOLITUDELAKEMANAGEMENT.COM 2019 DPC Water Supply PWS Buffer and Well Map PWS Ground-Truthed Buffer SWPA_5 mile FIGURE: SURVEY DATE: MAP DATE: Water Well Public Water Supply/Well 5 --- 4/29/19 2019_Namaske Lake_OneStop 5-Mile Outlet PWS_Map

Legend

Public Water Supply Wells

Map Scale 1: 50,000

Notes 69,508 NAMASKE LAKE - 5 Mile Outlet PWS

Master ID: 52930 Public Water System ID: 0915020 Source ID: 001 System Name: LEARN AS WE PLAY CHLD CARE CTR Address: 276 GOFFSTOWN BACK RD Town: GOFFSTOWN System Activity: A System Type: P Population: 94 Source Activity: A Source Type: G Well Type: BRW Well Depth: 420 WHPA Volume: 1860 Production Volume: 0 Yield: 20 Position Accuracy (Ft): 25

Lat: 43° 0' 54.05015" N Lon: 71° 30' 57.73862" W 2019_Namaske Lake (North)_OneStop WWI-PWS_Map

Legend

Public Water Supply Wells Water Well Inventory

Map Scale 1: 12,988

Notes 18,056 2019_Namaske Lake (South)_OneStop WWI-PWS_Map

Legend

Public Water Supply Wells Water Well Inventory

Map Scale 1: 12,988

Notes 18,056 NAMASKE LAKE - WWI-PWS Treatment Area Setback Calcs / Info Water Well Inventory Master ID: 52930 Well: 093.1285 Well: 093.1346 Public Water System ID: 0915020 Name: SOCHA Name: GURSKI Source ID: 001 Street Number: Street Number: 32 System Name: LEARN AS WE PLAY CHLD CARE CTR Road: RIVERVIEW PARK RD Road: BAY ST Address: 276 GOFFSTOWN BACK RD Town: GOFFSTOWN Town: GOFFSTOWN Town: GOFFSTOWN Date Completed: Jul 19, 2006 8:00 PM Date Completed: Sep 30, 2008 8:00 PM System Activity: A Use: 1, Type: 1 Use: 1, Type: 1 System Type: P Total Depth (Ft): 265 Total Depth (Ft): 140 Population: 94 Depth to Bedrock (Ft): 33 Depth to Bedrock (Ft): 21 Source Activity: A Yield (GPM): 12 Yield (GPM): 15 Source Type: G Overburden Type: 1 Overburden Type: 123 Well Type: BRW Well Depth: 420 WHPA Volume: 1860 Well: 093.1305 Well: 093.0154 Production Volume: 0 Name: CONGDON Name: MCMASTER Yield: 20 Street Number: 9 Street Number: Position Accuracy (Ft): 25 Road: SONNY AVE Road: DANIS PARK RD Town: GOFFSTOWN Town: GOFFSTOWN Lat: 43° 0' 54.05015" N Date Completed: Nov 15, 2006 7:00 PM Date Completed: Nov 9, 1986 7:00 PM Lon: 71° 30' 57.73862" W Use: 1, Type: 1 Use: 1, Type: 1 Total Depth (Ft): 500 Total Depth (Ft): 355 BRW Setback Distance: 250 feet Depth to Bedrock (Ft): 78 Depth to Bedrock (Ft): 20 OneStop Estimated Positional Error: 25 feet Yield (GPM): 2 Yield (GPM): 15 Total BRW setback: 275 feet Overburden Type: 4 Overburden Type: 2 Measured OneStop Distance from Treatment Area: 714 feet *Outside of 275 foot total BRW setback (System ACTIVE / Source ACTIVE)

Legal Notice

NOTIFICATION OF PERMIT APPLICATION

Namaske Lake ‐ Goffstown

The Namaske Lake Association has contracted SŌLitude Lake Management, 590 Lake Street, Shrewsbury, MA 01545, Telephone 508‐865‐1000, to treat portions of Namaske Lake in Goffstown with the USEPA/State registered aquatic herbicide Procellacor EC (Florpyrauxifen‐ benzyl), EPA Registration Number 67690‐80, to control exotic variable milfoil weed. Final treatment areas will be determined following pre‐treatment surveys by NH DES.

A permit application has been filed with the state requesting approval for this treatment program. The treatment will likely be performed in mid to late July or September 2019. If a permit is issued, there will be additional notification of the actual treatment date and specific information on certain activities and water uses that will be temporarily restricted as a condition of the permit. Any questions concerning the proposed treatment should be directed to SŌLitude Lake Management at the above address.

Those wishing to comment on the proposed application may contact the New Hampshire Department of Agriculture, Division of Pesticide Control to request a public hearing. Comments must be received in writing within 15 days of receipt of this notice.

New Hampshire Department of Agriculture Division of Pesticide Control P.O. Box 2042 Concord, NH 03302‐2042 (603) 271‐3550

2019 Potential treatment SŌLitude Lake Management areas are shaded (up to 40 590 Lake Street acres with footprint shown) Shrewsbury, MA 01545

«FIRST_NAME» «LAST_NAME» «ADDRESS» «TOWN», «ST» «ZIP»

April 29, 2019

Namaske Lake Abutter,

The Namaske Lake Association has contracted SŌLitude Lake Management, 590 Lake Street, Shrewsbury, MA 01545, Telephone 508‐865‐1000, to treat portions of Namaske Lake in Goffstown with the USEPA/State registered aquatic herbicide Procellacor EC (Florpyrauxifen‐benzyl), EPA Registration Number 67690‐80, to control exotic variable milfoil weed. Final treatment areas will be determined following pre‐treatment surveys by NH DES.

New Hampshire Department of Agriculture Division of Pesticide Control P.O. Box 2042 Concord, NH 03302‐2042 (603) 271‐3550

The treatment is tentatively scheduled for mid to late July or early September 2019. Based on past experiences, we expect that the State will impose restrictions on the use of treated lake water for drinking and irrigation purposes. The specific use restrictions will be determined at the time the permit is issued and will be communicated directly to you in the notification of treatment that will be sent by certified‐mail.

The restrictions apply to all intakes within 200 feet of the treatment area, and to all wells within 50 feet of shoreline that itself is within 200 feet of a treatment area. Intakes (black pipe) that draw water directly from Namaske Lake within 200 feet of proposed treatment areas WILL be subject to irrigation and drinking restrictions. If you have a well within 50 feet of the lake or an intake, please let us know by contacting Steve Gniadek at our office weekdays at (508) 458‐6626 or by emailing [email protected]. Please be sure to reference Namaske Lake in your email. If you have additional questions, please visit our NH specific webpage at https://www.solitudelakemanagement.com/newhampshire

590 Lake Street, Shrewsbury, MA 01545 | 508-865-10000 | SŌLITUDELAKEMANAGEMENT.COM 2019 Namaske Lake Abutter List Map Block Lot Location Owner Owner #2 Mailing City State Zip Code 364OFF MANCHESTER LINE ALLARD REV TRUST, KAREN EC/O KAREN ALLARD, TRUSTEE 96 RIVERVIEW PARK RD MANCHESTER NH 03102 3 64B ISLAND PUBLIC SERVICE CO OF N HPO BOX 270 HARTFORD CT 06141‐0270 61044 ALLARD PARK RD ALLARD REV TRST OF 1996, ANITA ALLARD TRUSTEE, ANITA 44 ALLARD PARK RD GOFFSTOWN NH 03045 6 11 1 GOFFSTOWN BACK RD MIMIKATE HOLDINGS LLC C/O STEPHEN & MELANIE SARETTE 282 GOFFSTOWN BACK RD GOFFSTOWN NH 03045 633OFF MAST RD HILLSBOROUGH COUNTY FARM FINANCE OFFICE 329 MAST RD SUITE 114 GOFFSTOWN NH 03045 636369 DANIS PARK RD GAGNE, PAUL A & ROBIN L69 DANIS PARK RD GOFFSTOWN NH 03045 6363‐167 DANIS PARK RD WIGGIN, CHRISTOPHER & JOELLE 67 DANIS PARK RD GOFFSTOWN NH 03045 6 91 ISLAND/GLEN LAKE MODESTO, JAMES 266A GOFFSTOWN BACK RD GOFFSTOWN NH 03045 18 54 MOOSE CLUB PARK RD MASON, TIM & DONNA 24 GREEN ACRE DR SALEM NH 03079 19 2 30 SHORE DR BOURQUE ONE FAMILY TRST C/O MARC & TERRIE BOURQUE, TR 30 SHORE DR GOFFSTOWN NH 03045 19 4 26 SHORE DR FEARON, BENJAMIN & KARYN 26 SHORE DR GOFFSTOWN NH 03045 19 5 24 SHORE DR GLADYSZ, MARK E & ANITA J24 SHORE DR GOFFSTOWN NH 03045 19 6 20 SHORE DR DAVIS, HENRY A & KELLY A20 SHORE DR GOFFSTOWN NH 03045 19 7 18 SHORE DR HOLIGAN, DONNA S & ALLAIN, JUDY 18 SHORE DR GOFFSTOWN NH 03045 19 8 16 SHORE DR HANLEY, THOMAS C &HANLEY, EILEEN V16 SHORE DRIVE GOFFSTOWN NH 03045 19 9 3 CHANNEL LN TURGEON, JOHN D3 CHANNEL LANE GOFFSTOWN NH 03045 19 10 5 CHANNEL LN GAGNON, RYAN & RACHEL 5 CHANNEL LN GOFFSTOWN NH 03045 19 11 7 CHANNEL LN DOWSE, LAURIE A &BOHAN, JOHN R7 CHANNEL LN GOFFSTOWN NH 03045 19 12 9 CHANNEL LN MURPHY, PATRICIA A9 CHANNEL LN GOFFSTOWN NH 03045 19 13 11 CHANNEL LN CHANNEL 11 RLTY TRUST RONDEAU TRSTEE, DENIS 1010 MERRIMAN RD AKRON OH 44303 19 14 15 CHANNEL LN SAVAGEAU, LEA A & BRENNAN, LUCAS F15 CHANNEL LN GOFFSTOWN NH 03045 19 15 19 CHANNEL LN TOWN OF GOFFSTOWN ‐ SEWER 16 MAIN ST GOFFSTOWN NH 03045 19 16 21 CHANNEL LN ARGERIOU, WALTER M21 CHANNEL LANE GOFFSTOWN NH 03045 19 17 23 CHANNEL LN HUNTER, BRUCE & EDNA & CALLANAN, JAMES & JOHN 23 CHANNEL LANE GOFFSTOWN NH 03045 19 18 25 CHANNEL LN MOORE, GARY & ESTHER 25 CHANNEL LANE GOFFSTOWN NH 03045 19 19 26 CHANNEL LN ROCHE, JOSHUA 26 CHANNEL LANE GOFFSTOWN NH 03045 19 22 15 CIRCLE DR SANTOS, ROSEMARIE 15 CIRCLE DR GOFFSTOWN NH 03045 19 23 20 CIRCLE DR PAQUETTE, CHRISTINE & LUKE 20 CIRCLE DR GOFFSTOWN NH 03045 19 24 19 CIRCLE DR SCHUNEMANN, THOMAS & SCHUNEMANN, TORREE LYNN 19 CIRCLE DRIVE GOFFSTOWN NH 03045 19 25 5 10 CIRCLE DR DUKELOW, BRIAN 10 CIRCLE DR GOFFSTOWN NH 03045 19 25 6 12 CIRCLE DR BADOLATI, BONNIE LYNN 12 CIRCLE DR GOFFSTOWN NH 03045 19 47 13 OFF MOOSE CLUB PARK RD TOWN OF GOFFSTOWN 16 MAIN ST GOFFSTOWN NH 03045 19 47 14 OFF MOOSE CLUB PARK RD TOWN OF GOFFSTOWN 16 MAIN ST GOFFSTOWN NH 03045 21 56 27 COVE ST SECULAR INSTITUTE OF PIUS XC/O VIVIANE LAURENDEAU 202 COMEAU ST MANCHESTER NH 03102 21 57 28 COVE ST DEASY, MARY J &DEASY, EDWARD 1910 SOUTH BEACH BLVD APT 134 DELRAY BEACH FL 33483 21 58 29 COVE ST CAMPBELL, MARY 29 COVE ST GOFFSTOWN NH 03045 21 60 31 COVE ST DUBOIS, JOSHUA G & SARAH K31 COVE ST GOFFSTOWN NH 03045 21 61 33 COVE ST POULIOT, MATTHEW S & SALLY A35 COVE ST GOFFSTOWN NH 03045 21 62 35 COVE ST POULIOT, MATTHEW S & SALLY A35 COVE ST GOFFSTOWN NH 03045 21 63 39 COVE ST KARNEDY, D SCOTT & JILL L39 COVE ST GOFFSTOWN NH 03045 21 64 41 COVE ST SCHNEIDERHEINZE FAMILY REV TRST CUNNINGHAM, KAREN & ETAL 235 WALLACE RD BEDFORD NH 03110 21 65 35 BAY ST FOURNIER, SHAWN GERALD 12 CINDY DR HOOKSETT NH 03106 21 66 37 BAY ST SHAW, WILLIAM 37 BAY ST GOFFSTOWN NH 03045 21 67 39 BAY ST DUBOIS, NORMAN A &DUBOIS, NELLIE E39 BAY ST GOFFSTOWN NH 03045‐2635 1 2019 Namaske Lake Abutter List Map Block Lot Location Owner Owner #2 Mailing City State Zip Code 21 68 41 BAY ST MARCU, MELANIA & MALITA, MIHAELA & STEFAN, GHEORGHE 41 BAY ST GOFFSTOWN NH 03045 21 69 43 BAY ST SHEAROUSE, SUSAN F43 BAY ST GOFFSTOWN NH 03045 21 70 45 BAY ST CARON, DORIS 45 BAY ST GOFFSTOWN NH 03045 21 71 47 BAY ST CARON, DONALD R47 BAY ST GOFFSTOWN NH 03045 21 72 51 BAY ST DUVAL REVOC TRST, NORMAN DUVAL TRUSTEE, NORMAN 51 BAY ST GOFFSTOWN NH 03045 21 81 74 COVE ST HEMMAH, STEVEN &YUAN, YU JUNG 77‐161 LUPALUPA WAY KAILUAKONA HI 96740 21 83 66 COVE ST LANDRY, SCOTT A & TRACY L66 COVE ST GOFFSTOWN NH 03045 21 115 144 MOOSE CLUB PARK RD TRIMBLE, EVELYN I 144 MOOSE CLUB PARK RD GOFFSTOWN NH 03045 21 118 149 MOOSE CLUB PARK RD CHRISTIE, RICHARD & MARY ANN 149 MOOSE CLUB PARK RD GOFFSTOWN NH 03045 21 119 1 153 MOOSE CLUB PARK RD PREWARA, LAWRENCE 153 MOOSE CLUB PK RD GOFFSTOWN NH 03045 21 119 151 MOOSE CLUB PARK RD CLOCKEDILE, ROBERT C &SMITH, DONNA 151 MOOSE CLUB PARK RD GOFFSTOWN NH 03045 21 122 159 MOOSE CLUB PARK RD TURCOTTE, JOHN M 159 MOOSE CLUB PARK RD GOFFSTOWN NH 03045 21 123 163 MOOSE CLUB PARK RD TROUPAKIS, COSTA C 163 MOOSE CLUB PARK RD GOFFSTOWN NH 03045 21 124 100 COVE ST COBURN JR, JOHN FPO BOX 561 GOFFSTOWN NH 03045‐0561 21 125 95 COVE ST THOMPSON, CALVIN C &THOMPSON, RUTH E33 HEVEY ST MANCHESTER, NH 03102 21 126 COVE ST GRANITE STATE MACHINE CO INC 124 JOLIETTE ST MANCHESTER, NH 03102 21 127 COVE ST GRANITE STATE MACHINE CO INC 124 JOLIETTE ST MANCHESTER NH 03102 21 128 81 COVE ST ROSS, SCOTT P 81 COVE ST GOFFSTOWN NH 03045 21 129 77 COVE ST COTTON, JEFFREY 77 COVE ST GOFFSTOWN NH 03045 21 62A 37 COVE ST HOULE REV TRST, KENNETH HOULE TRUSTEE, KENNETH J37 COVE ST GOFFSTOWN NH 03045 21 72A 50 BAY ST BARKER, MATTHEW W50 BAY ST GOFFSTOWN NH 03045 22 2 61 RIVERVIEW PARK RD LECLERC, STEPHANE & KAREN 61 RIVERVIEW PARK RD MANCHESTER NH 03102 22 3 65 RIVERVIEW PARK RD CLOUTIER, DANIEL J &PINARD, DONNA L65 RIVERVIEW PARK RD MANCHESTER NH 03102 22 5 69 RIVERVIEW PARK RD O'GARA, JAMES F & O'GARA, PAULINE E69 RIVERVIEW PK RD MANCHESTER NH 03102 22 6 75 RIVERVIEW PARK RD HAAS, GUY D & WILL, KATHERINE H75 RIVERVIEW PARK RD MANCHESTER NH 03102 22 7 83 RIVERVIEW PARK RD PLUMB LIVING TRUST PLUMB TRSTEES, GARY & LYNN 83 RIVERVIEW PARK RD MANCHESTER NH 03102 22 8 87 RIVERVIEW PARK RD PINARD REV FAMILY TRST PINARD, NORMAND & LORRAINE 87 RIVERVIEW PARK RD MANCHESTER NH 03102 22 9 89 RIVERVIEW PARK RD ALLARD REV TRST '94, RICCI JC/O RJ & ME ALLARD CO‐TRSTEES 89 RIVERVIEW PARK RD MANCHESTER NH 03102 22 13 OFF RIVERVIEW PARK RD ALLARD REV TRUST, JOHN R ALLARD TRUSTEE, JOHN R96 RIVERVIEW PARK RD MANCHESTER NH 03102 22 15 92 RIVERVIEW PARK RD SOCHA 2000 TRUST, TIMOTHY PSOCHA TRUSTEE, TIMOTHY 92 RIVERVIEW PARK RD MANCHESTER NH 03102 22 1B 36 SHORE DR FIELD, NICOLE MC/O NICOLE DOHERTY 36 SHORE DR GOFFSTOWN NH 03045 22 1C SHORE DR THERRIEN, ROGER P & DIANE L 771 MONTGOMERY ST MANCHESTER NH 03102 22 1D SHORE DR THERRIEN, DIANE L & ROGER P 771 MONTGOMERY ST MANCHESTER NH 03102 22 1E SHORE DR MONK JR, BENTON & ELIZABETH 126 MOOSE CLUB PARK RD GOFFSTOWN NH 03045 22 1F SHORE DR MONK, BENTON & ELIZABETH 126 MOOSE CLUB PARK RD GOFFSTOWN NH 03045 22 1G MOOSE CLUB PARK RD MOOSE CLUB PARK BEACH CORP C/O PAUL TAGLINI 39 SHORE DR GOFFSTOWN NH 03045 24 25 3 SONNY AV SCHEERDERS, RHONDA D3 SONNY AVE GOFFSTOWN NH 03045 24 26 5 SONNY AV SCHEERDERS, RHONDA & LESMERISES, BRIAN 3 SONNY AVE GOFFSTOWN NH 03045 24 27 7 SONNY AV PUGLISI, JOHN A &PUGLISI, NICOLE 7 SONNY AVE GOFFSTOWN NH 03045 24 28 SONNY AV PUGLISI, JOHN 7 SONNY AVE GOFFSTOWN NH 03045 24 29 9 SONNY AV HANLEY, LOUISE & THOMAS 84 DUMONT PARK RD GOFFSTOWN NH 03045 24 30 11 SONNY AV HOFFMAN, DAVID A11 SONNY AVE GOFFSTOWN NH 03045 24 31 15 SONNY AV COLE, ANTHONY M15 SONNY AVE GOFFSTOWN NH 03045 24 32 17 SONNY AV NADEAU, CHRISTOPHER L17 SONNY AVE GOFFSTOWN NH 03045 2 2019 Namaske Lake Abutter List Map Block Lot Location Owner Owner #2 Mailing City State Zip Code 24 34 18A RUSSELL AV MCCARTNEY, ERIN & NATHAN 18A RUSSELL AV GOFFSTOWN NH 03045 24 36 18 RUSSELL AV WHYNOTT JR, ROBERT J18 RUSSELL AVE GOFFSTOWN NH 03045 24 38 15 ANDRE ST GARRITY, PAMELA H15 ANDRE ST GOFFSTOWN NH 03045 24 39 ANDRE ST AUDLEY, SHANNON 84 SHAW RD NORTHFIELD NH 03276 24 40 27 ANDRE ST DOHERTY, CHRISTOPHER G27 ANDRE STREET GOFFSTOWN NH 03045 24 41 30 ANDRE ST CATUDAL, STEPHEN 30 ANDRE ST GOFFSTOWN NH 03045 24 49 75 LYNCHVILLE PARK RD VOLKMANN LIVING TRST, RACHEL VOLKMANN, RACHEL & HENRY 53 LYNCHVILLE PARK RD GOFFSTOWN NH 03045 24 53 89 LYNCHVILLE PARK RD DICHARD, RICHARD & MARGARET &DICHARD, RICHARD ROBERT 89 LYNCHVILLE PARK RD GOFFSTOWN NH 03045 24 55 91 LYNCHVILLE PARK RD ADAMS LIVING TRST, WARREN ADAMS, WARREN & PATRICIA 507 CHARLES BANCROFT HWY LITCHFIELD NH 03052 24 56 LYNCHVILLE PARK RD ADAMS, WARREN W 507 CHARLESBANCROFT HIGHWAY LITCHFIELD NH 03052 24 57 84 LYNCHVILLE PARK RD PAQUIN, RONALD G &LAURION, ANDRE 84 LYNCHVILLE PARK RD GOFFSTOWN NH 03045 24 58 82 LYNCHVILLE PARK RD WELCH, GREGORY & SUZANNE 82 LYNCHVILLE PARK RD GOFFSTOWN NH 03045 24 59 80 LYNCHVILLE PARK RD MARION III, ALBERT &MARION, BRIAN A80 LYNCHVILLE PARK RD GOFFSTOWN NH 03045 24 63 17 COVE ST ROY, ROBERT A &ROY, DENISE D17 COVE ST GOFFSTOWN, NH 03045 24 64 19 COVE ST QUINN, CASEY 19 COVE ST GOFFSTOWN NH 03045 24 65 21 COVE ST KING, RANDY H & REBECCA L21 COVE ST GOFFSTOWN NH 03045 24 66 23 COVE ST KING, RANDY H & REBECCA L23 COVE ST GOFFSTOWN NH 03045 24 67 25 COVE ST KING, RANDY H & REBECCA L25 COVE ST GOFFSTOWN NH 03045 24 68 SARETTE RD ALLARD REV TRUST, JOHN R ALLARD TRUSTEE, JOHN R96 RIVERVIEW PARK RD MANCHESTER NH 03102 24 69 91 SARETTE RD BERARDINO, DEBORAH A3 FIR ST LONDONDERRY NH 03053 24 72 77 SARETTE RD KINDURIS, RICHARD J & PAULINE C 293 GOFFSTOWN BACK RD GOFFSTOWN NH 03045 24 73 73 SARETTE RD PARIS, ROBERT 46 LISA DR GOFFSTOWN NH 03045 24 74 71 SARETTE RD PILOTTE, MARGUERITE D & ETAL 40 COLUMBIA RD MANCHESTER NH 03103 24 75 69 SARETTE RD LEIGH, CHARLES E & JANET T69 SARETTE RD GOFFSTOWN NH 03045 24 77 32 WATER RD STROPLE, TIMOTHY G & MICHELLE 32 WATER RD GOFFSTOWN NH 03045 24 78 16 WATER RD JOSEFIAK, MICHAEL F16 WATER RD GOFFSTOWN NH 03045 24 79 12 WATER RD NAGELSCHMIDT, MATTHEW S12 WATER RD GOFFSTOWN NH 03045 24 80 14 WATER RD BALLES, KRISTIN & BALLES, KIM 14 WATER RD GOFFSTOWN NH 03045 24 82 4 WATER RD TRINITY FAMILY TRUST, ROLANDE TRINITY , ROLANDE THIBAULT 4 WATER RD GOFFSTOWN NH 03045 24 83 OFF SARETTE RD BEIQUE FAMILY REVOC TRUST BEIQUE TRUSTEE, HENRY R 352B GOFFSTOWN BACK RD GOFFSTOWN NH 03045 24 85 OFF SARETTE RD TRINITY FAMILY TRUST, ROBERT TRINITY TRUSTEE, ROBERT J4 WATER RD GOFFSTOWN NH 03045 24 24A 1 SONNY AV POULIOT, DANIE & COLETTE 241 LOVERING ST MANCHESTER NH 03109 24 32A 19 SONNY AV LAROCHELLE, MARC &BARBERIO, LISA M19 SONNY AVE GOFFSTOWN, NH 03045 24 33A 20 RUSSELL AV RANDO, CYNTHIA &LENZI, PHILIP 20 RUSSELL AV GOFFSTOWN NH 03045 24 35A 18C RUSSELL AV PAYNE, MARK & CARRIER, CARLEEN 6472 STARFISH AVE NORTH PORT FL 34291 24 37A 11 ANDRE ST SPEAR, CHARLES K &SPEAR, SUKI S11 ANDRE ST GOFFSTOWN NH 03045 24 55A 90 LYNCHVILLE PARK RD ADAMS, WARREN W 507 CHARLES BANCROFT HIGHWAY LITCHFIELD NH 03052 24 55C 94 LYNCHVILLE PARK RD BOURQUE, MATTHEW & KAREN PO BOX 152 DEERFIELD NH 03037 24 55D 92 LYNCHVILLE PARK RD JEAN, JOYCE A 149 APRICOT ST WORCESTER MA 01603 24 55E 98 LYNCHVILLE PARK RD MARTIN, JAMES J 153 BOW ST MANCHESTER NH 03103 24 55G 93 LYNCHVILLE PARK RD ADAMS LIVING TRUST WARREN & PATRICIA ADAMS 507 CHARLES BANCROFT HWY LITCHFIELD NH 03052 24 55H 96 LYNCHVILLE PARK RD LEE, MARC P 96 LYNCHVILLE PARK RD GOFFSTOWN NH 03045 24 63A 15 COVE ST METHOT, ALPHEE J15 COVE ST GOFFSTOWN NH 03045 24 67A OFF COVE ST PUBLIC SERVICE CO OF N HPO BOX 270 HARTFORD CT 06141‐0270 3 2019 Namaske Lake Abutter List Map Block Lot Location Owner Owner #2 Mailing City State Zip Code 24 68A SARETTE RD ALLARD REV TRUST, JOHN R ALLARD TRUSTEE, JOHN R96 RIVERVIEW PARK RD MANCHESTER NH 03102 24 70A 87 SARETTE RD LAVALLEE HANKS REV FAMILY TRST G LAVALLEE & D HANKS TRSTEES 358 BLACK BROOK RD GOFFSTOWN NH 03045 24 71A 83 SARETTE RD MEMIC, HEDIB & DRAGA &MEMIC, ALMIR 83 SARETTE RD GOFFSTOWN NH 03045 24 71B 85 SARETTE RD OCANOVIC, ZAIM & KAMENKA 85 SARETTE RD GOFFSTOWN NH 03045 25 1 73 DANIS PARK RD MCMASTER, ROBERT &MCMASTER, PAULINE 73 DANIS PK RD GOFFSTOWN, NH 03045 25 3 79 DANIS PARK RD GUERTIN, BENJAMIN E 1621 FRONT ST MANCHESTER NH 03102 25 4 85 DANIS PARK RD PAUL, W F MAXWELL 85 DANIS PARK RD GOFFSTOWN NH 03045 25 6 91 DANIS PARK RD LEFRANCOIS JR, LEO E &LEFRANCOIS, ANITA 91 DANIS PK RD GOFFSTOWN NH 03045 25 8 95 DANIS PARK RD ROY, SUSAN R & RODIER JR, RAYMOND L95 DANIS PARK RD GOFFSTOWN NH 03045 25 10 99 DANIS PARK RD LABRECQUE, JOELLE & LABRECQUE, DAVID 119 WHEELER RD HOLLIS NH 03049 25 11 103 DANIS PARK RD THORGERSON, PETER M 103 DANIS PARK RD GOFFSTOWN NH 03045 25 12 107 DANIS PARK RD MILLER, KEVIN D 107 DANIS PARK RD GOFFSTOWN NH 03045 25 23 109 DANIS PARK RD NOEL, MAURICE A &NOEL, SUSAN & NOEL, MAUREEN 109 DANIS PARK RD GOFFSTOWN NH 03045 25 24 111 DANIS PARK RD BUCKLAND, SCOTT 115 DANIS PARK RD GOFFSTOWN NH 03045 25 27 115 DANIS PARK RD BUCKLAND, SCOTT F 115 DANIS PARK RD GOFFSTOWN NH 03045 25 28 DANIS PARK RD HOBBS, FRANK F & HOBBS, JANICE E 123 DANIS PARK RD GOFFSTOWN NH 03045 25 29 119 DANIS PARK RD HOBBS, FRANK F & HOBBS, JANICE E 123 DANIS PARK RD GOFFSTOWN NH 03045 25 30 DANIS PARK RD HOBBS, FRANK F & JANICE E 123 DANIS PARK RD GOFFSTOWN NH 03045 25 31 123 DANIS PARK RD HOBBS, FRANK 123 DANIS PARK RD GOFFSTOWN NH 03045 25 32 131 DANIS PARK RD FORSYTH, LINDA 131 DANIS PARK RD GOFFSTOWN NH 03045 25 33 135 DANIS PARK RD SKORUPSKI, DEBRA A & CHARBONNEAU, LIONEL H 135 DANIS PK RD GOFFSTOWN NH 03045 25 34 139 DANIS PARK RD JOBIN, SALLY M &JOBIN, CHRISTOPHER P 100 DUMONT PARK RD GOFFSTOWN NH 03045 25 35 100 DUMONT PARK RD JOBIN, CHRISTOPHER P & SALLY M 100 DUMONT PARK RD GOFFSTOWN NH 03045 25 12A DANIS PARK RD MEYER, JOHN EDWARD & MEYER, PAMELA J 106 DANIS PARK RD GOFFSTOWN NH 03045 43 1 46 RIVERVIEW PARK RD TK SOCHA LLC 92 RIVERVIEW PARK RD MANCHESTER NH 03102 43 2 44 RIVERVIEW PARK RD TK SOCHA LLC 92 RIVERVIEW PARK RD MANCHESTER NH 03102 43 3 40 RIVERVIEW PARK RD DUBISZ, JEFFREY 40 RIVERVIEW PARK RD MANCHESTER NH 03102 43 4 38 RIVERVIEW PARK RD ARCIDIACONO, JOSEPH E &MENDEZ‐ARCIDIACONO, EMMA 38 RIVERVIEW PARK RD MANCHESTER NH 03102 43 5 36 RIVERVIEW PARK RD BLANCHETTE, SUZANNE L36 RIVERVIEW PARK RD MANCHESTER NH 03102 43 10 33 RIVERVIEW PARK RD CHRETIEN FAMILY TRST, YVAN & DENISE CHRETIEN TRSTEES, YVAN & DENISE 6164 KENWOOD DR NORTH PORT FL 34287 43 11 25 RIVERVIEW PARK RD LEBRUN, LUCILLE G25 RIVERVIEW PARK RD MANCHESTER NH 03102 43 12 35 ARROWHEAD DR LOISELLE REV FAM TRST, JOHN JOCELYNE LOISELLE TRUSTEE, JOCELYNE 35 ARROWHEAD DR MANCHESTER NH 03102 43 13 33 ARROWHEAD DR BOUCHER, PAUL A & TAMMIE 33 ARROWHEAD DR GOFFSTOWN NH 03045 43 14 29 ARROWHEAD DR LESMERISES JOINT REV TRST, R & C LESMERISES, RICHARD & CHARLOTTE 29 ARROWHEAD DR MANCHESTER NH 03102 43 16 25 ARROWHEAD DR LEBLANC FAMILY REVOC TRUST LEBLANC TRSTEES, PHILLIP & IRENE 116 OAKDALE AVE MANCHESTER NH 03103 43 17 23 ARROWHEAD DR COLBURN, AMANDA 23 ARROWHEAD DR MANCHESTER NH 03102 43 18 21 ARROWHEAD DR TETU, WILLIAM J & EILEEN Y21 ARROWHEAD DR MANCHESTER NH 03102 43 19 19 ARROWHEAD DR AUBIN, ROGER F ET AL 96 ADAMS RD LONDONDERRY NH 03053 43 20 17 ARROWHEAD DR FIELD, RAY H & PRISCILLA 15 QUEBEC ST METHUEN MA 01844 43 21 15 ARROWHEAD DR VAILLANCOURT, MAI VO 1 FRONT ST CHELSEA MA 02150 43 22 11 ARROWHEAD DR SAYKALY, NICHOLAS E11 ARROWHEAD DR MANCHESTER NH 03102 43 23 9 ARROWHEAD DR ADIE, CHRISTOPHER 9 ARROWHEAD DR MANCHESTER NH 03102 43 24 5 ARROWHEAD DR KAZAKIS, JENNIFER & ANDREW &ROBERTS, WILLIAM & JEANETTE 5 ARROWHEAD DR MANCHESTER NH 03102 43 25 6 TRESTLE LN ROCK II, ROBERT A6 TRESTLE LANE MANCHESTER NH 03102 4 2019 Namaske Lake Abutter List Map Block Lot Location Owner Owner #2 Mailing City State Zip Code 43 26 8 TRESTLE LN KRIETE, CHARLES W 1100 SADDLE CREEK CT SPARKS MD 21152 43 27 10 TRESTLE LN 10 TRESTLE LANE LLC 190 CHAUNCEY ST MANCHESTER NH 03104 43 28 15 TRESTLE LN POLINES, JON 15 TRESTLE LN MANCHESTER NH 03102 43 29 16 TRESTLE LN PEACE, PAUL G & RITA R16 TRESTLE LN MANCHESTER NH 03102 43 30 18 TRESTLE LN PARKER, THOMAS A & SYLVIA P18 TRESTLE LN MANCHESTER NH 03102 43 31 1 RIVERVIEW PARK RD BLEVENS, KRISTEN L & MARK 568 UPLAND ST MANCHESTER NH 03102 43 11A 25A RIVERVIEW PARK RD PAQUIN, RICHARD & LYNNE 25A RIVERVIEW PARK RD MANCHESTER NH 03102 43 11B 25B RIVERVIEW PARK RD LEBRUN, LUCILLE 25B RIVERVIEW PARK RD MANCHESTER NH 03102 693 55 155 AGNES ST PISCATQUOG RIVER APART LTD PT 1662 ELM ST STE 100 MANCHESTER NH 03101 693 40B 41 ELECTRIC ST CITY OF MANCHESTER PARKS & REC 625 MAMMOTH RD MANCHESTER NH 03104 693 40C 10 ELECTRIC ST STATE OF NH DEPT ENV WTR DIV c/o CHI ENERGY INC;J.BOGERT, V.P. 1 TECH DR STE 220 ANDOVER MA 01810 702 3 ELECTRIC ST STATE OF NH ELECTRIC ST MANCHESTER NH 03102 702 4 76 ELECTRIC ST DONAHUE, MORRIS 22 WALNUT HILL RD DERRY NH 03038 702 5 82 ELECTRIC ST SKENDE, VICTOR F82 ELECTRIC ST MANCHESTE NH 03102‐2807 702 6 98 ELECTRIC ST DIONNE, JOSEPHINE 98 ELECTRIC ST MANCHESTER NH 03102 702 7 106 ELECTRIC ST DIONNE, ROBERT 106 ELECTRIC ST MANCHESTER NH 03102 702 8 116 ELECTRIC ST UNTIET, DAVID 116 ELECTRIC ST MANCHESTER NH 03102 702 9 140 ELECTRIC ST LESPERANCE, LILLIAN A 140 ELECTRIC ST MANCHESTER NH 03102 702 10 ELECTRIC ST VEILLEUX, DENISE E22 HULME ST MANCHESTER NH 03109 702 11 195 ELECTRIC ST DAVIS, MURRAY P 195 ELECTRIC ST MANCHESTER NH 03102 777 2A MASON ST CITY OF MANCHESTER PARKS & RECREATION 625 MAMMOTH RD MANCHESTER NH 03104 TOWN OF GOFFSTOWN HEALTH OFFICER 16 MAIN ST GOFFSTOWN NH 03045 CITY OF MANCHESTER HEALTH OFFICER 625 MAMMOTH RD MANCHESTER NH 03104

5 Goffstown

Namaske Lake - Southeast Town of Goffstown, NH The Town of Goffstown, NH makes no warranty as to the accuracy, reliability, or completeness of the information and is not responsible for any errors or omissions or for results obtained from the use of the information.

1 inch = 658 feet Goffstown

Namaske Lake - Mid Town of Goffstown, NH The Town of Goffstown, NH makes no warranty as to the accuracy, reliability, or completeness of the information and is not responsible for any errors or omissions or for results obtained from the use of the information.

1 inch = 658 feet Goffstown

Namaske Lake - Northwest Town of Goffstown, NH The Town of Goffstown, NH makes no warranty as to the accuracy, reliability, or completeness of the information and is not responsible for any errors or omissions or for results obtained from the use of the information.

1 inch = 658 feet UPLAND ST 777-13

777-2A

Area Map Showing Extent Of Map At Left

N W O T S F F O G N W O T S F F O G

702-11 702-13 702-12 702-14

ELECTRIC ST 702-15 Piscataquog River 702-10 702-16

702-17

702-19

702-9

702-8

702-7 693-55 Legend Surrounding Towns Lake / Pond Parcels River 702-6 Easements Wet Area Building Stream Outbuilding Deck Foundation Other Building or Structure Pool Tank Roads

702-5

DISCLAIMER The information appearing on this map is for the convenience 702-4 of the user and is not an official public record of the City of Manchester, NH (the"City"). This map is not survey-quality. All boundaries, easements, areas, measurements, rights-of-way, etc., that appear are derived from varied data sets which may be individually compiled at different map scales. In such cases, some geographic information from different data sets may appear in inaccurate relationship to each other. Therefore, geographic features shown on this map should only be considered approximations, and as such have no official or legal value. The City makes no warranties, expressed or implied, concerning the accuracy, completeness, reliability, or suitability of this City of Manchester, New Hampshire - Public GIS Map Viewer / 0 60 120 240 Feet information for any particular use. The City assumes no liability whatsoever associated with the use or misuse of this information. The official public records from which this data was compiled are kept in the offices of various City, County, and State government agencies and departments, and are available for inspection and copying during normal business hours. By using this map, you agree to these terms and conditions. 702-10 702-15 702-17 628-12 702-16 702-19 702-20 702-21

702-22 702-9 702-23

ELECTRIC ST

702-25 702-8 702-24

Area Map Showing Extent Of Map At Left 702-7 702-26 702-6 Piscataquog River 702-27 702-5 BREMER ST 702-28

702-4 702-29

702-1

702-3

702-1

693-55 KELLEY ST

693-40C 627-38 AGNES ST

693-40B PARKING LOT ACCESS WAY Legend Surrounding Towns Lake / Pond Parcels River Easements Wet Area Building Stream 627-11A Outbuilding Deck BIRON ST Foundation 693-40C Other Building or Structure 693-16 Pool 693-40B Tank Roads

693-14 693-17 DISCLAIMER 693-55 The information appearing on this map is for the convenience 693-13 of the user and is not an official public record of the City of Manchester, NH (the"City"). This map is not survey-quality. All boundaries, easements, areas, measurements, rights-of-way, GOFFSTOWNGOFFSTOWN etc., that appear are derived from varied data sets which may NAZAIRE BIRON BRIDGE be individually compiled at different map scales. In such 693-18 cases, some geographic information from different data sets 693-40D 647-3 may appear in inaccurate relationship to each other. Therefore, geographic features shown on this map should only be considered 693-12A 693-19 approximations, and as such have no official or legal value. The City makes no warranties, expressed or implied, concerning the accuracy, completeness, reliability, or suitability of this City of Manchester, New Hampshire - Public GIS Map Viewer / 0 60 120 240 Feet information for any particular use. The City assumes no liability whatsoever associated with the use or misuse of this information. The official public records from which this data was compiled are kept in the offices of various City, County, and State government agencies and departments, and are available for inspection and copying during normal business hours. By using this map, you agree to these terms and conditions. CONFIDENTIAL – NH Dept. of Environmental Services review Memo NH Natural Heritage Bureau NHB Datacheck Results Letter

To: Amy Smagula, DES-Biology Section 29 Hazen Drive Concord, NH 03301

From: Amy Lamb, NH Natural Heritage Bureau Date: 2/8/2019 (valid for one year from this date) Re: Review by NH Natural Heritage Bureau NHB File ID: NHB19-0446 Town: Manchester Location: Namaske Lake Description: Dive/DASH (12 days); 40 acres of herbicide cc: Kim Tuttle

As requested, I have searched our database for records of rare species and exemplary natural communities, with the following results. Comments: Contact the NH Fish & Game Department to address wildlife concerns.

Vertebrate species State1 Federal Notes Blanding's Turtle (Emydoidea blandingii) E -- Contact the NH Fish & Game Dept (see below). Northern Black Racer (Coluber constrictor T -- Contact the NH Fish & Game Dept (see below). constrictor)

1Codes: "E" = Endangered, "T" = Threatened, “SC” = Special Concern, "--" = an exemplary natural community, or a rare species tracked by NH Natural Heritage that has not yet been added to the official state list. An asterisk (*) indicates that the most recent report for that occurrence was more than 20 years ago.

Co ntact for all animal reviews: Kim Tuttle, NH F&G, (603) 271-6544. A negative result (no record in our database) does not mean that a sensitive species is not present. Our data can only tell you of known occurrences, based on information gathered by qualified biologists and reported to our office. However, many areas have never been surveyed, or have only been surveyed for certain species. An on-site survey would provide better information on what species and communities are indeed present.

Department of Natural and Cultural Resources DNCR/NHB Division of Forests and Lands 172 Pembroke Rd. (603) 271-2214 fax: 271-6488 Concord, NH 03301 CONFIDENTIAL – NH Dept. of Environmental Services review

NHB19-0446 EOCODE: ARAAD04010*184*NH

New Hampshire Natural Heritage Bureau - Animal Record

Blanding's Turtle (Emydoidea blandingii)

Legal Status Conservation Status Federal: Not listed Global: Apparently secure but with cause for concern State: Listed Endangered State: Critically imperiled due to rarity or vulnerability

Description at this Location Conservation Rank: Fair quality, condition and/or landscape context ('C' on a scale of A-D). Comments on Rank:

Detailed Description: 2007: Area 11798: 1 adult observed, 9" carapace. General Area: 2007: Area 11798: Bridge crossing Piscataquog River. General Comments: Management Comments:

Location Survey Site Name: Piscataquog River Reservoir Managed By:

County: Hillsborough Town(s): Manchester Size: .4 acres Elevation:

Precision: Within (but not necessarily restricted to) the area indicated on the map.

Directions: 2007: Area 11798: Kelley Street Bridge crossing Piscataquog River in Pinardville.

Dates documented First reported: 2007-06-05 Last reported: 2007-06-05

The New Hampshire Fish & Game Department has jurisdiction over rare wildlife in New Hampshire. Please contact them at 11 Hazen Drive, Concord, NH 03301 or at (603) 271-2461.

CONFIDENTIAL – NH Dept. of Environmental Services review NHB19-0446 EOCODE: ARADB0701D*075*NH

New Hampshire Natural Heritage Bureau - Animal Record

Northern Black Racer (Coluber constrictor constrictor)

Legal Status Conservation Status Federal: Not listed Global: Demonstrably widespread, abundant, and secure State: Listed Threatened State: Imperiled due to rarity or vulnerability

Description at this Location Conservation Rank: Not ranked Comments on Rank:

Detailed Description: 2013: Area 14181: 1 adult observed, sex unknown. General Area: 2013: Area 14181: Forest, with animal going into hollow at base of tree. General Comments: Management Comments:

Location Survey Site Name: Rock Rimmon Managed By:

County: Hillsborough Town(s): Manchester Size: 7.7 acres Elevation:

Precision: Within (but not necessarily restricted to) the area indicated on the map.

Directions: 2013: Area 14181: Rock Rimmon park, Manchester.

Dates documented First reported: 2013-04-15 Last reported: 2013-04-15

The New Hampshire Fish & Game Department has jurisdiction over rare wildlife in New Hampshire. Please contact them at 11 Hazen Drive, Concord, NH 03301 or at (603) 271-2461.

CONFIDENTIAL – NH Dept. of Environmental Services review Prepared by: NH Department of Environmental Services March 2019

Long-Term Variable Milfoil Management Plan ......

Namaske Lake Goffstown/Manchester, New Hampshire

Page 2 of 52

Contents Purpose ...... 4

Invasive Aquatic Plant Overview ...... 4

Variable Milfoil Infestation in Namaske Lake ...... 5

Milfoil Management Goals and Objectives ...... 9

Local Support ...... 9

Town or Municipality Support ...... 9

Waterbody Characteristics...... 10

Beneficial (Designated) Uses of Waterbody ...... 11

Aquatic Life ...... 11

Wildlife Information ...... 12

Recreational Uses and Access Points...... 13

Macrophyte Community Evaluation ...... 14

Wells and Water Supplies ...... 14

Historical Control Activities ...... 15

Aquatic Invasive Plant Management Options ...... 16

Feasibility Evaluation of Control Options in this Waterbody ...... 17

Recommended Actions, Timeframes and Responsible Parties ...... 18

Notes ...... 22

Target Specificity ...... 22

Adaptive Management ...... 22

Figure 1: Map of Variable Milfoil Infestations Over Time ...... 23

Figure 2: Map of Control Actions Over Time ...... 25

2010 ...... 25

2012 ...... 26

2013 (Proposed, up to 20 acres maximum) ...... 27

2013 (Actual) ...... 28

2014 (Proposed) ...... 29

2014 (Actual) ...... 30

2015 (Proposed) ...... 31

2019 Proposed ...... 36

Figure 3: Map of Native Aquatic Macrophytes ...... 38

Key to Macrophyte Map ...... 38

Figure 4: Bathymetric Map ...... 40

Figure 5: Historic Critical Habitats or Conservation Areas ...... 41

Figure 6: Public Access ...... 42

Figure 7: Wells and Water Supplies, 1:48,000 scale ...... 43

Appendix A Criteria to Evaluate Aquatic Plant Control Techniques . 44

Appendix B Summary of Control Practices ...... 48

Restricted Use Areas and Fragment Barrier: ...... 48

Hand-pulling: ...... 48

Diver Assisted Suction Harvesting ...... 49

Mechanical Harvesting ...... 49

Benthic Barriers: ...... 49

Targeted Application of Herbicides: ...... 50

Extended Drawdown ...... 51

Dredging ...... 51

Biological Control ...... 51

References ...... 52

Page 4 of 52

Purpose

The purposes of this exotic aquatic plant management and control plan are:

1. To identify and describe the historic and current exotic aquatic infestation(s) in the waterbody; 2. To identify short-term and long-term exotic aquatic plant control goals; 3. To minimize any adverse effects of exotic aquatic plant management strategies on non-target species; 4. To recommend exotic plant control actions that meet the goals outlined in this plan; and 5. To evaluate control practices used in this waterbody over time to determine if they are meeting the goals outlined in this plan.

This plan also summarizes the current physical, biological, ecological, and chemical components of the subject waterbody as they may relate to both the exotic plant infestation and recommended control actions, and the potential social, recreational and ecological impacts of the exotic plant infestation.

The intent of this plan is to establish an adaptive management strategy for the long-term control of the target species (in this case variable milfoil) in the subject waterbody, using an integrated plant management approach.

Appendix A and Appendix B detail the general best management practices and strategies available for waterbodies with exotic species, and provide more information on each of the activities that are recommended within this plan.

Invasive Aquatic Plant Overview

Exotic aquatic plants pose a threat to the ecological, aesthetic, recreational, and economic values of lakes and ponds (Luken & Thieret, 1997, Halstead, 2000), primarily by forming dense growths or monocultures in critical areas of waterbodies that are important for aquatic habitat and/or recreational use. Under some circumstances, dense growths and near monotypic stands of invasive aquatic plants can result, having the potential to reduce overall species diversity in both plant and animal species, and can alter water chemistry and aquatic habitat structure that is native to the system.

Since January 1, 1998, the sale, distribution, importation, propagation, transportation, and introduction of key exotic aquatic plants have been prohibited (RSA 487:16-a) in New Hampshire. This law was designed as a tool for lake managers to help prevent the spread of nuisance aquatic plants.

New Hampshire lists 27 exotic aquatic plant species as prohibited in the state (per Env-Wq 1303.02) due to their documented and potential threat to surface waters of the state.

According to the federal Section 305(b) and 303(d) Consolidated Assessment and Listing Methodology (CALM), “exotic macrophytes are non-native, fast growing aquatic plants, which can quickly dominate and choke out native aquatic plant growth in the surface water. Such infestations are in violation of New Hampshire regulation Env-Wq 1703.19, which states that surface waters shall support and maintain a balanced, integrated and adaptive community of organisms having a species composition, diversity, and functional organization comparable to that of similar natural habitats of a region” (DES, 2006). In fact, waterbodies that contain even a single exotic aquatic plant do not attain water quality standards and are listed as impaired.

Variable Milfoil Infestation in Namaske Lake

Namaske Lake is an impoundment on the Piscataquog River. Kelley’s Falls dam is the impoundment for Namaske Lake. Variable milfoil (Myriophyllum heterophyllum) became established in Namaske Lake in Manchester/Goffstown, New Hampshire in 2006 following the Mother’s Day flood, when high flows sent fragments downstream from other infested waterbodies (Scobie Pond (a.k.a. Haunted Lake) in Francestown at the headwater of the river, and from some plants present in Glen Lake in Goffstown).

Figure 1 illustrates the distribution of variable milfoil infestations in this waterbody over time, and the table below provides a summary of growth in each area of the grid overlay of Figure 1.

Page 6 of 52

Area Location/Area Year Description of Growth Milfoil % Cover Description A1 Upper reaches of 2009 Not surveyed Unknown Namaske 2010 Not surveyed Unknown Lake/Kelley’s Falls 2011 Small to medium patches 40% Impoundment. of variable milfoil throughout slow moving water, single stems and small patches in riffle areas 2012 Pre-treatment mall to 40% pre-treatment, medium patches of <5% post treatment variable milfoil throughout slow moving water, single stems and small patches in riffle areas, post-treatment very few milfoil plants present 2013 Scattered single stems in <5% shallows of river reach 2014 Scattered single stems in <5% shallows of river reach 2015 Early season growth at Spring – 10% upstream reach of impoundment, increasing Fall - 15% downstream through this zone as the season progressed. 2016 Northern/upstream reach Spring – 0% of the river looked good in spring, but growth Fall - 20% came in during the summer 2017 Patchy growth along 25% shore in the river, low density in June, increased density in August 2018 Single stems scattered <1% B1 Northern 2009 Dense variable milfoil 85% meander/cove growth 2010 Pre-treatment dense 85% pre-treatment, growth, post treatment <10% post reduced growth treatment 2011 Patchy growth 25% 2012 Pre-treatment moderate 60% pre-treatment, growth, post treatment <5% post treatment reduced growth 2013 Scattered stems and <15% clumps 2014 Increased growth in this 20-25% area, including regrowth following summer

Area Location/Area Year Description of Growth Milfoil % Cover Description control activities 2015 Common growth with Spring – 25% dense patches throughout the area in spring, Fall - 40% expanding late season. 2016 Common growth with Spring – 30% dense patches throughout the area in spring, Fall - <10% reduced late season via management 2017 Patchy growth of low to 15% moderate density, increasing as summer went on 2018 Single stems, small <5% clusters of stems, low density B2, B3, Middle/Broads area 2009 Dense growth along 75% C2, C3 shore, as shown in figure 2010 Dense growth along 75% pre-treatment, shore pre-treatment, little <10% post- growth observed post treatment treatment, mostly in cove areas 2011 Scattered shoreline 30% growth in B2 and B3, none in C2 and C3 2012 Scattered shoreline 35% pre-treatment, growth with thicker <5% post treatment growth in coves in B2 and B3, reduced post- treatment and with dive work 2013 Patchy growth along 15-20% shoreline areas and out into open-water area 2014 Expanded growth early 20-25% season before control activities, reduced growth but persistent/recurring growth following treatment 2015 Scattered patchy growth Spring – 10% early season, expanding as season progressed. Fall - 15% 2016 Scattered patchy growth Spring – 10% early season, less growth late season Fall - <5% 2017 Locally abundant patches 25% of growth in these zones.

Page 8 of 52

Area Location/Area Year Description of Growth Milfoil % Cover Description Not widespread, but small to medium denser patches. 2018 Scattered single stems, <1% sparse D3, D4 Lower reach, vicinity 2009 Dense growth along 60% of Kelley’s Falls shore and above dam Dam 2010 Pre-treatment high 60% pre-treatment, density near shore, post- 0% post treatment treatment none observed 2011 Scattered stems near <5% shore and above dam 2012 Scattered stems near <5% shore and above dam 2013 Several established 15% patches of small to medium size along shoreline sections 2014 Expanded locations of 20% growth and sizes of patches pre-control, reduced patches/growth post control, but with some degree of regrowth 2015 Scattered stems and Spring – 10% clumps early season, expanding to patches Fall - 30% along several shorelines by late season. 2016 Patchy growth along Spring – 25% shoreline areas with moderate density, less Fall - <10% dense late season due to managemnet 2017 Small patches and <10% clumps, lower density than in the past. 2018 Scattered single stems, <1% uncommon

In terms of the impacts of the variable milfoil in the system, there are 145 houses around the shoreline of Namaske Lake. There are also an estimated 60 back lots with lake rights.

Lake residents have expressed frustration with the exotic plant growth in the lake, citing fouling of their swim beaches, swim impairments, and a fast rate of spread and increase in the density of the variable milfoil. Specifically, residents have indicated that swimming has become undesirable and nearly impossible in some areas of dense growth; the use of power boats is hindered

due to fouling of boat propellers and jet propulsion units; and transient recreational gear is continually bringing tag-along plants out of the lake increasing the risk of spread to other waterbodies. Additionally, the invasive plant infestation in this waterbody is a continuous threat to the Piscataquog River and the Merrimack River downstream.

Namaske Lake is relatively shallow with silty and organic substrates, essentially creating prime variable milfoil habitat across nearly the whole impoundment where depth is not a limiting factor.

Milfoil Management Goals and Objectives

The goal for Namaske Lake is to greatly reduce the overall distribution and density of variable milfoil within the system using an Integrated Pest Management Approach, to maintain the infestation to less than 10% of the overall waterbody, that is at a level where growths of the variable milfoil are at a level suitably managed by non-chemical means of control such as diver or diver-assisted suction harvesting.

Eradication in this system is not feasible at this time due to the presence of upstream infestations in Scobie Pond in Francestown and in Glen Lake in Goffstown. Control activities have been ongoing in both Scobie Pond and Glen Lake for a number of years, and efforts have reduced the milfoil growth in each system, however some growth persists, and fragments can easily flow downstream through the Piscataquog River and contribute to continued growth in Namaske Lake. Acting now in Namaske Lake, before upstream infestations are fully controlled, is intended to provide relief to shorefront property owners who have experienced use impairments in Namaske Lake since the infestation began, and to keep milfoil growth restricted and at lower density to limit further downstream migration of fragments.

Local Support

Town or Municipality Support The cities of Manchester and Goffstown have been contacted for providing funding assistance for this project. In 2010, the town of Goffstown raised funds through a warrant article for this project, but unfortunately the City of Manchester was not able to provide financial assistance for the 2010 activities. The lake association has been encouraged to seek support from the towns once again.

Page 10 of 52

Lake Association Support Namaske Lake has an active and newly formed lake association. The lake association was formed as a result of the milfoil infestation so that there was a local group that could facilitate control actions and receive grant funds for any projects that are proposed.

The lake association has individuals that are committed to performing follow- up monitoring for milfoil re-growth, and working with DES to coordinate hand-removal and benthic barrier placement for further variable milfoil control when appropriate.

Waterbody Characteristics

The following table summarizes basic physical and biological characteristics of Namaske Lake, including the milfoil infestation. Note that a current review of the Natural Heritage Bureau (NHB) database was requested and the results from that search are pending, and will be provided as soon as they are available.

General Lake Information Lake area (acres) 192.5 acres Watershed area (acres) Approx. 137,000 acres (Piscataquog R. Watershed) Shoreline Uses (residential, Mainly residential, some forested forested, agriculture) Max Depth (ft) 25.41 Mean Depth (ft) 5.28 Trophic Status Mesotrophic Color (CPU) in Epilimnion 50 Clarity (ft) 5.61 Flushing Rate (yr-1) 311.3 Natural waterbody/Raised by Impounded river segment Damming/Other Invasive Plants (Latin name) Myriophyllum heterophyllum Infested Area (acres) Approximately 116.6 acres at maximum density in 2010. See Figure 1a for current acreage. Distribution (ringing lake, patchy See Figures growth, etc) Sediment type in infested area Silty/organic (sand/silt/organic/rock) Historic Rare, Threatened, or 2019 Review: Endangered Species in or Near Blanding's Turtle (Emydoidea blandingii) Waterbody (according to NH Northern black race (Coluber constrictor constrictor) Natural Heritage Inventory) Historic Reviews: Redfin Pickerel (Esox americanus americanus) Wood Turtle (Glyptemys insculpta) Blue-fronted Dancer (Argia apicalis)

Brook floater (Alasmidonta varicose) Persius dusky wing (Erynnis persium persius) Pine Barrens zanclognatha (Zanclognatha martha)

An aquatic vegetation map and key from a summer 2008 survey by the DES Biology Section is shown in Figure 3. The map was verified in 2012 and no obvious changes in native plant growth were observed. A bathymetric map based on soundings from 1980 is provided for reference, but true bathymetric contours are expected to deviate from these.

Beneficial (Designated) Uses of Waterbody

In New Hampshire, beneficial (designated) uses of our waterbodies are categorized into five general categories: Aquatic Life, Fish Consumption, Recreation, Drinking Water Supply, and Wildlife (CALM).

Of these, Aquatic Life, Wildlife and Recreation are the ones most often affected by the presence of invasive plants, though drinking water supplies can also be affected as well in a number of ways.

Following is a general discussion of the most potentially impacted designated uses, including water supplies and near shore wells, as they relate to this system and the actions proposed in this long-term plan.

The goal for aquatic life support is to provide suitable chemical and physical conditions for supporting a balanced, integrated and adaptive community of aquatic organisms having a species composition, diversity, and functional organization comparable to that of similar natural habitats of the region.

Aquatic Life Fisheries Information (information obtained from an NHB review and information provided by the NH F&G Department)

According to the NH Fish and Game Department, fish species present include largemouth bass, smallmouth bass, golden shiner, pickerel, yellow perch, white perch, common white sucker, brown bullhead, and yellow bullhead. A few brook trout are also stocked each year. Fishing pressure is light during open-water and rare during winter.

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Wildlife Information

An historic Natural Heritage Inventory review yielded six records of species of concern in or near Namaske Lake: Brook floater (Alasmidonta varicose), Persius dusky wing (Erynnis persium persius), Pine Barrens zanclognatha (Zanclognatha martha), Blanding’s turtle (Emydoidea blandingii), Blue- fronted Dancer (Argia apicalis) and Redfin pickerel (Esox americanus americanus). The 2018 review only included two of these, as shown in the table on the previous page, with the addition on the wood turtle (Glyptemys insculpta). Figure 5 shows the documented locations of each species.

Two of the species are located in pine barren habitat east of Namaske Lake (Persius dusky wing (Erynnis persium persius) and Pine Barrens zanclognatha (Zanclognatha martha)) and are terrestrial species.

The redfin pickerel was documented upstream in the Piscataquog River, and in a nearby system that is not hydrologically connected to Namaske Lake.

The blue-fronted dancer was documented near the southern end of the impoundment and is not expected to be impacted by control activities.

The brook floater has been documented upstream and downstream of the Namaske Lake impoundment. The brook floater mussel is listed as endangered in NH due to rarity or vulnerability, but has no federal listing at this time. Globally the species is listed as rare or uncommon. The NHB record for this species in this area dates to a 1994 sighting in the mainstem of the Piscataquog River, downstream of the Kelley Street Bridge. Approximately 1-10 specimens were documented in a 50 m X 4 m survey lane by the observer. The herbicide of choice for this control activity is 2,4-D, which has been shown by EPA to be non-toxic to aquatic life when used according to label restrictions. There are no expected impacts to this species as a result of the milfoil control activities in Namaske Lake. It is not expected that habitat or food sources for the mussel will be affected either.

The wood turtle record dates to 2013, when one individual was observed in a coniferous forest near the lower Piscataquog River. The wood turtle is listed as a species of special concern in New Hampshire, due to its rarity. DES looks to Fish and Game for any recommendations about setbacks or protective measures for this species, if there are concerns about proposed management actions within the river.

The Blanding’s turtle was located downstream of the impoundment. The Blanding’s turtle is listed as endangered in New Hampshire, where it is rare or

uncommon. It has no federal listing, and it is listed as globally secure, but a cause for concern. The NHB record for this species in this area dates to a 2007 sighting near the Kelley Street Bridge. One adult was observed at the time. Blanding’s Turtles are mostly aquatic and are found in the shallows of lakes and ponds, in marshes, bogs, and small streams. The turtles nest on land, but feed underwater on insects, tadpoles, crayfish, and snails, among other small aquatic organisms. The herbicide of choice for this control activity is 2,4-D, which has been shown by EPA to be non-toxic to aquatic life when used according to label restrictions. There are no expected impacts to this species as a result of the milfoil control activities in Namaske Lake. It is not expected that habitat or food sources for the turtle will be affected either. The Fish and Game Department has requested that contractors avoid direct herbicide application in scrub shrub dominated wetland coves, in order to minimize potential impacts to this species.

Recreational Uses and Access Points

Namaske Lake is used for numerous recreational activities, including boating, fishing, swimming, and water skiing by both pond residents and transient boaters. In the last few years the recreational uses of the waterbody have become impaired by dense growths of variable milfoil, at times inhibiting some types of recreation. There is one designated public access for boats on the southeastern side of the impoundment, off from Electric Street, under the Kelley Street Bridge (Figure 4). Small motor boats, as well as kayaks and canoes can use this launch. There is limited parking for about two vehicles with trailers and a couple of additional vehicles.

In terms of boating activity, lake residents estimate that there are roughly 90- 100 power boats using the waterbody on a regular basis, and about 60 non- motorized vessels such as canoes and kayaks.

There are no public beaches on the impoundment (also called “designated beach”). A designated beach is described in the CALM as an area on a waterbody that is operated for bathing, swimming, or other primary water contact by any municipality, governmental subdivision, public or private corporation, partnership, association, or educational institution, open to the public, members, guests, or students whether on a fee or free basis. Env-Wq 1102.14 further defines a designated beach as “a public bathing place that comprises an area on a water body and associated buildings and equipment, intended or used for bathing, swimming, or other primary water contact purposes. The term includes, but is not limited to, beaches or other swimming areas at hotels, motels, health facilities, water parks, condominium complexes, apartment complexes, youth recreation camps, public parks, and recreational campgrounds or camping parks as defined in RSA 216-I:1, VII.

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The term does not include any area on a water body which serves 3 or fewer living units and which is used only by the residents of the living units and their guests.

There are a few small private swim beaches located on private properties around the impoundment, and some floating docks and swim platforms around the waterbody as well.

Macrophyte Community Evaluation

The littoral zone is defined as the nearshore areas of a waterbody where sunlight penetrates to the bottom sediments. The littoral zone is typically the zone of rooted macrophyte growth in a waterbody. The littoral zone of Namaske Lake is characterized by a mix of native and non-native (variable milfoil) plant growth (Figure 3). Native species include a mix of floating plants (floating heart, yellow water-lily, watershield), emergent plants (bur-reed, arrow arum, pickerelweed, iris), and submergent plants (waterweed, grassy spike rush, pondweed, grassy bur-reed, water purslane/false loosestrife, water starwort, water naiad, and grassy arrowhead.). Native plant communities are mixed around the entire lake, and are characterized as ‘common’ by the DES.

No major changes in native plant community populations were observed between 2008 and 2012 survey dates.

In addition to variable milfoil being present as an invasive species in this system, purple loosestrife was also identified as single plants or small clusters around portions of the shoreline. The lake residents are encouraged to carefully hand-remove the purple loosestrife plants and their roots to prevent further spread.

An NHB review of the system revealed no state-listed endangered aquatic plants in Namaske Lake.

Wells and Water Supplies

Figure 7 shows the location of wells, water supplies, well-head protection areas, and drinking water protection areas around the subject waterbody, based on information in the DES geographic information system records. Note that it is likely that Figure 7 does not show the location of all private wells.

Note that the map in Figure 7 cannot be provided on a finer scale than 1:48,000. Due to public water system security concerns, a large-scale map

may be made available upon agreement with DES’ data security policy. Visit DES’ OneStop Web GIS, http://www2.des.state.nh.us/gis/onestop/ and register to Access Public Water Supply Data Layers. Registration includes agreement with general security provisions associated with public water supply data. Paper maps that include public water supply data may be provided at a larger-scale by DES’ Exotic Species Program after completing the registration process.

In the event that an herbicide treatment is needed for this waterbody, the applicator/contractor will provide more detailed information on the wells and water supplies within proximity to the treatment areas as required in the permit application process with the Division of Pesticide Control at the Department of Agriculture. It is beyond the scope of this plan to maintain updated well and water supply information other than that provided in Figure 7.

Historical Control Activities

DATE CONTROL ACTION ACRES CONTRACTOR/ENTITY 23-Jun- 2,4-D TREATMENT 110 acres ACT 10 VARIED (2 HOURS DIVER HAND DIVE TIME, 80 9/2/2011 DES REMOVAL GALLONS OF MILFOIL REMOVED)

09-Jul-12 2,4-D (G) 19 acres ACT VARIED, NO FORMAL DIVE REPORTS FILED, LARRY PILOTTE SUMMER DIVER HAND TIME AND (LOCAL WEED 2012 REMOVAL MATERIAL CONTROL DIVER) REMOVED UNKNOWN 2,4-D & 6/26/2013 10.73 ACRES ACT TRICLOPYR (G)

8/5/2014 2,4-D BEE 33.7 ACRES ACT

DASH and DIVER 10/7/2014 80 gallons AQUALOGIC Hand Removal

10/8/2014 DASH 10 gallons AQUALOGIC

10/9/2014 DASH 270 gallons AQUALOGIC

6/30/2015 2,4-D BEE 8.7 ACRES ACT

Page 16 of 52

DATE CONTROL ACTION ACRES CONTRACTOR/ENTITY 7/16/2015 Hand 45 Gal AQUALOGIC

8/3/2015 DASH 100 gal AQUALOGIC

8/4/2015 HAND 45 gal AQUALOGIC

8/5/2015 HAND 30 gal AQUALOGIC

8/6/2015 HAND 45 gal AQUALOGIC

8/7/2015 HAND 60 gal AQUALOGIC

4329 LBS FOR 39 SOLitude LAKE 7/7/2016 2,4-D BEE (G) ACRES MANAGEMENT 6/26/2017 DASH 100 gal AQUALOGIC 6/27/2017 DASH 80 gal AQUALOGIC 6/28/2017 DASH 80 gal AQUALOGIC 6/29/2017 DASH 120 gal AQUALOGIC 6/30/2017 DASH 200 gal AQUALOGIC 8/28/2017 DASH 54 gal AQUALOGIC 8/28/2017 DASH 20 gal AQUALOGIC 8/29/2017 DASH 104 gal AQUALOGIC 8/30/2017 DASH 20 gal AQUALOGIC 8/30/2017 DASH 20 gal AQUALOGIC 8/31/2017 DASH 20 gal AQUALOGIC 8/31/2017 DASH 8 gal AQUALOGIC 5964 LBS FOR 42.2 SOLitude LAKE 9/18/2017 2,4-D (G) ACRES MANAGEMENT

7/20/2018 DASH 10 gal AQUALOGIC

11/1/2018 DASH 60 gal AQUALOGIC

11/2/2018 DASH 90 gal AQUALOGIC

Due to lack of local funds, diving was not performed in 2016.

Aquatic Invasive Plant Management Options

The control practices used should be as specific to the target species as feasible. No control of native aquatic plants is intended.

Exotic aquatic plant management relies on a combination of proven methods that control exotic plant infestations, including physical control, chemical control, biological controls (where they exist), and habitat manipulation.

Integrated Pest Management Strategies (IPM) are typically implemented using Best Management Practices (BMPs) based on site-specific conditions so as to maximize the long-term effectiveness of control strategies. Descriptions for the control activities are closely modeled after those prescribed by the Aquatic Ecosystem Restoration Foundation (AERF) (2004). This publication can be found online at http://www.aquatics.org/bmp.html.

Criteria for the selection of control techniques are presented in Appendix A. Appendix B includes a summary of the exotic aquatic plant control practices currently used by the State of New Hampshire.

Feasibility Evaluation of Control Options in this Waterbody

DES has evaluated the feasibility of potential control practices on the subject waterbody. The following table summarizes DES’ control strategy recommendations for the subject waterbody:

Control Method Use on Namaske Lake Restricted Use Not recommended as variable milfoil growth is Areas widespread in the waterbody and there is no way to restrict access to these areas unless access to the entire impoundment is restricted. Fragment Barrier A fragment barrier is recommended at the upstream reach of the impounded area, to trap fragments from upstream waterbodies. Lake association members are encouraged to form teams of volunteers to inspect and clean nets throughout the growing season to maintain functionality. Hand-pulling DES recommends that the individual stems or small patches of variable milfoil be hand pulled when encountered; however, prior to hand-removal activities being successful, the majority of the variable milfoil biomass must be controlled chemically, otherwise the hand-pull effort will be futile. Upstream areas should be monitored for pioneering growth and that should be hand-removed.

Local divers interested in performing hand-removal activities in Namaske Lake are encouraged to become certified Weed Control Divers (WCD) in

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Control Method Use on Namaske Lake order to perform these tasks for the lake association as needed. Mechanical For Namaske Lake, mechanical harvesting is not Harvesting/Removal recommended due to concerns about plant fragmentation and further spread. This technique also does not target root systems, so re-growth will likely be rapid. Benthic Barriers For Namaske Lake, DES recommends installing small benthic barriers in areas of re-growth if small patches of variable milfoil re-grow and can adequately be contained by benthic barriers. Any barrier installation should consider factors such as flow and depth and the feasibility of maintaining the barrier based on those conditions. Herbicides For Namaske Lake, herbicide use is recommended as primary treatment due to extent of infestation. The aquatic herbicide 2,4-D is recommended in 2010 and perhaps in 2011 or 2012 to reduce growths enough to allow for non-chemical controls to be effective. Extended Drawdown is not an effective control method for Drawdown variable milfoil. Dredge Not recommended due to nature of exotic plant distribution, the cost, or the ancillary ecological impacts that the dredge could have. Biological Control There are no approved biological controls for variable milfoil at this time in New Hampshire. No Control In order to allow for a healthy stand of mixed native aquatic vegetation, as well as areas of open habitat in the system, a ‘No Control’ option is not recommended. Without control, variable milfoil will eventually take over all available habitat in the littoral zone of Namaske Lake. Variable milfoil has been showing exponential growth in Namaske Lake, therefore action to manage the plants in needed.

Recommended Actions, Timeframes and Responsible Parties

An evaluation of the size, location, and type of variable milfoil infestation, as well as the waterbody uses was conducted at the end of the last growing season (see attached figures for findings). Based on this survey the following recommendations are made for variable milfoil control in the system:

Year Action Responsible Schedule Party 2017 Weed Watching and Local Weed Once a marking/reporting of milfoil growth Watchers month from May through September Survey and planning for DES May/June summer/fall milfoil control actions Diver/DASH work as needed and Contract Diver June- recommended (areas to be September determined based on updated spring as needed survey) as funding allows Herbicide treatment SŌLitude Lake June or Management, September LLC Survey waterbody and planning for DES September next season’s control actions

2018 Weed Watching and Local Weed Once a marking/reporting of milfoil growth Watchers month from May through September Survey and planning for DES May/June summer/fall milfoil control actions Diver/DASH work as needed and Contract Diver June- recommended (areas to be September determined based on updated spring as needed survey) Herbicide treatment SŌLitude Lake June or Management, September LLC Survey waterbody and planning for DES September next season’s control actions 2019 Weed Watching and Local Weed Once a marking/reporting of milfoil growth Watchers month from May through September Survey and planning for DES May/June summer/fall milfoil control actions

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Year Action Responsible Schedule Party Diver/DASH work as needed and Contract Diver June- recommended (areas to be September determined based on updated spring as needed survey) Herbicide treatment if needed SŌLitude Lake June, July Management, or LLC September Survey waterbody and planning for DES September next season’s control actions

2020 Weed Watching and Local Weed Once a marking/reporting of milfoil growth Watchers month from May through September Survey and planning for DES May/June summer/fall milfoil control actions Diver/DASH work as needed and Contract Diver June- recommended (areas to be September determined based on updated spring as needed survey) Herbicide treatment SŌLitude Lake June or Management, September LLC Survey waterbody and planning for DES September next season’s control actions 2021 Weed Watching and Local Weed Once a marking/reporting of milfoil growth Watchers month from May through September Survey and planning for DES May/June summer/fall milfoil control actions Diver/DASH work as needed and Contract Diver June- recommended (areas to be September determined based on updated spring as needed survey) Herbicide treatment SŌLitude Lake June or Management, September LLC

Year Action Responsible Schedule Party Survey waterbody and planning for DES September next season’s control actions

2022 Update and revise Long-Term DES and Fall/ Variable Milfoil Control Plan Interested Winter Parties

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Notes

Target Specificity It is important to realize that aquatic herbicide applications are conducted in a specific and scientific manner. To the extent feasible, the permitting authority favors the use of selective herbicides that, where used appropriately, will control the target plant with little or no impact to non-target species, such that the ecological functions of native plants for habitat, lake ecology, and chemistry/biology will be maintained. Not all aquatic plants will be impacted as a result of an herbicide treatment.

Adaptive Management Because this is a natural system that is being evaluated for management, it is impossible to accurately predict a management course over five years that could be heavily dependent on uncontrolled natural circumstances (weather patterns, temperature, adaptability of invasive species, etc).

This long-term plan is therefore based on the concept of adaptive management, where current field data (from field survey work using DES established field survey standard operating procedures) drive decision making, which may result in modifications to the recommended control actions and timeframes for control. As such, this management plan should be considered a dynamic document that is geared to the actual field conditions that present themselves in this waterbody.

If circumstances arise that require the modification of part or all of the recommendations herein, interested parties will be consulted for their input on revisions that may be needed to further the goal of variable milfoil management in the subject waterbody.

Figure 1: Map of Variable Milfoil Infestations Over Time

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2017 Milfoil Growth

Figure 2: Map of Control Actions Over Time

2010

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2012

2013 (Proposed, up to 20 acres maximum)

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2013 (Actual)

2014 (Proposed)

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2014 (Actual)

2015 (Proposed)

2015 (Actual)

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2016 (Proposed)

2016 (Actual)

2017 (Proposed dive and potential treatment activities)

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2017 (Actual)

2018 (Proposed)

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2019 Proposed

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Figure 3: Map of Native Aquatic Macrophytes

K e y t o

M a c r o p h y t e

M a p Symbol Common Name Latin Name Y Yellow water-lily Nuphar S Bur-reed Sparganium D Three-way sedge Dulichium arundinaceum U Bladderwort Utricularia V Tapegrass Vallisneria americana X Pondweed Potamogeton I Purple iris Iris L Purple loosestrife Lythrum salicaria E Spike rush Eleocharis T Cattail Typha P Pipewort Eriocaulon B Bulrush Scirpus A Arrowhead Sagittaria sp.

Plant Map Key

Symbol Common Name Latin Name H Floating heart Nymphoides cordata S Bur-reed Sparganium Y Yellow water-lily Nuphar A Arrow arum Peltandra virginica P Pickerelweed Pontedaria cordata E Waterweed Elodea I Iris Iris 9 Grassy spike rush (submersed) Eleocharis B Watershield Brasenia schreberi X Pondweed Potamogeton sp. 2 Grassy bur-reed Sparganium O Water purslane/false loosestrife Ludwigia C Water starwort Callitriche L Purple loosestrife Lythrum salicaria G Grassy arrowhead Sagittaria N Water naiad Najas sp.

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Figure 4: Bathymetric Map

Figure 5: Historic Critical Habitats or Conservation Areas

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Figure 6: Public Access

Figure 7: Wells and Water Supplies, 1:48,000 scale

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Appendix A Criteria to Evaluate Aquatic Plant Control Techniques

Preliminary Investigations

I. Field Site Inspection

• Verify genus and species of the plant. • Determine if the plant is a native or exotic species per RSA 487:16, II. • Map extent of the exotic aquatic plant infestation (area, water depth, height of the plant, density of the population). • Document any native plant abundances and community structure around and dispersed within the exotic/nuisance plant population (provide updated native plant map after review of milfoil in the Fall or after treatment)

II. Office/Laboratory Research of Waterbody Characteristics

• Contact the appropriate agencies to determine the presence of rare or endangered species in the waterbody or its prime wetlands. • Determine the basic relevant limnological characteristics of the waterbody (size, bathymetry, flushing rate, nutrient levels, trophic status, and type and extent of adjacent wetlands). • Determine the potential threat to downstream waterbodies from the exotic aquatic plant based on limnological characteristics (water chemistry, quantity, quality as they relate to movement or support of exotic plant growth).

Overall Control Options

For any given waterbody that has an infestation of exotic plants, one of four options will be selected, based on the status of the infestation, the available management options, and the technical knowledge of the DES Limnologists and other key resource managers who have conducted the field work and who are preparing or contributing to this plan. The options are as follows:

1) Eradication: The goal is to completely remove the exotic plant infestation over time. In some situations this may be a rapid response that results in an eradication event in a single season (such as for a new infestation), in other situations a longer-term approach may be warranted given the age and distribution of the infestation. Eradication is more feasible in smaller systems without extensive expanded growth (for example, Lake Winnipesaukee is unlikely to achieve eradication of its variable milfoil), or without upstream sources of infestation in other connected systems that continually feed the lake.

2) Maintenance: Waterbodies where maintenance is specified as a goal are generally those with expansive infestations, that are larger systems, that have complications of extensive wetland complexes on their periphery, or that have upstream sources of the invasive plant

precluding the possibility for eradication. For waterbodies where maintenance is the goal, control activities will be performed on the waterbody to keep an infestation below a desirable threshold. For maintenance projects, thresholds of percent cover or other measurable classification will be indicated, and action will occur when exotic plant growth exceeds the threshold.

3) Containment: The aim of this approach is to limit the size and extent of the existing infestation within an infested waterbody if it is localized in one portion of that waterbody (such as in a cove or embayment), or if a whole lake is infested action may be taken to prevent the downstream migration of fragments or propagules. This could be achieved through the use of fragment barriers and/or Restricted Use Areas or other such physical means of containment. Other control activities may also be used to reduce the infestation within the containment area.

4) No action. If the infestation is too large, spreading too quickly, and past management strategies have proven ineffective at controlling the target exotic aquatic plant, DES, in consultation with others, may elect to recommend ‘no action’ at a particular site. Feasibility of control or control options may be revisited if new information, technologies, etc., develop.

If eradication, maintenance or containment is the recommended option to pursue, the following series of control techniques may be employed. The most appropriate technique(s) based on the determinations of the preliminary investigation will be selected.

Guidelines and requirements of each control practice are suggested and detailed below each alternative, but note that site specific conditions will be factored into the evaluation and recommendation of use on each individual waterbody with an infestation.

A. Hand-Pulling and Diver-Assisted Suction Harvesting

• Hand-pulling can be used if infestation is in a small localized area (sparsely populated patch of up to 5’ X 5’, single stems, or dense small patch up to 2’ X 2’). For larger areas Diver-Assisted Suction Harvesting (DASH) may be more appropriate. • Can be used if plant density is low, or if target plant is scattered and not dense. • Can be used if the plant could effectively be managed or eradicated by hand- pulling or DASH • Use must be in compliance with the Wetlands Bureau rules.

B. Mechanically Harvest or Hydro-Rake

• Can not be used on plants which reproduce vegetatively by fragmentation (e.g., milfoil, fanwort, etc.) unless containment can be ensured. • Can be used only if the waterbody is accessible to machinery.

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• Can be used if there is a disposal location available for harvested plant materials. • Can be used if plant depth is conducive to harvesting capabilities (~ <7 ft. for mower, ~ <12 ft. for hydro-rake). • If a waterbody is fully infested and no other control options are effective, mechanical harvesting can be used to open navigation channel(s) through dense plant growth.

C. Herbicide Treatment

• Can be used if application of herbicide is conducted in areas where alternative control techniques are not optimum due to depth, current, use, or density and type of plant. • Can be used for treatment of exotic plants where fragmentation is a high concern. • Can be used where species specific treatment is necessary due to the need to manage other plants • Can be used if other methods used as first choices in the past have not been effective. • A licensed applicator should be contacted to inspect the site and make recommendations about the effectiveness of herbicide treatment as compared with other treatments.

D. Restricted Use Areas (per RSA 487:17, II (d))

• Can be established in an area that effectively restricts use to a small cove, bay, or other such area where navigation, fishing, and other transient activities may cause fragmentation to occur. • Can not be used when there are several “patches” of an infestation of exotic aquatic plants throughout a waterbody. • Can be used as a temporary means of control.

E. Bottom Barrier • Can be used in small areas, preferably less than 10,000 sq. ft. • Can be used in an area where the current is not likely to cause the displacement of the barrier. • Can be used early in the season before the plant reaches the surface of the water. • Can be used in an area to compress plants to allow for clear passage of boat traffic. • Can be used in an area to compress plants to allow for a clear swimming area. • Use must be in compliance with the Wetlands Bureau rules.

F. Drawdown

• Can be used if the target plant(s) are susceptible to drawdown control.

• Can be used in an area where bathymetry of the waterbody would be conducive to an adequate level of drawdown to control plant growth, but where extensive deep habits exist for the maintenance of aquatic life such as fish and amphibians. • Can be used where plants are growing exclusively in shallow waters where a drawdown would leave this area “in the dry” for a suitable period of time (over winter months) to control plant growth. • Can be used in winter months to avoid encroachment of terrestrial plants into the aquatic system. • Can be used if it will not significantly impact adjacent or downstream wetland habitats. • Can be used if spring recharge is sufficient to refill the lake in the spring. • Can be used in an area where shallow wells would not be significantly impacted. • Reference RSA 211:11 with regards to drawdown statutes.

G. Dredge

• Can be used in conjunction with a scheduled drawdown. • Can be used if a drawdown is not scheduled, though a hydraulic pumping dredge should be used. • Can only be used as a last alternative due to the detrimental impacts to environmental and aesthetic values of the waterbody.

H. Biological Control

• Grass carp cannot be used as they are illegal in New Hampshire. • Exotic controls, such as insects, cannot be introduced to control a nuisance plant unless approved by Department of Agriculture. • Research should be conducted on a potential biological control prior to use to determine the extent of target specificity.

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Appendix B Summary of Control Practices

Restricted Use Areas and Fragment Barrier: Restricted Use Areas (RUAs) are a tool that can be use to quarantine a portion of a waterbody if an infestation of exotic aquatic plants is isolated to a small cove, embayment, or section of a waterbody. RUAs generally consist of a series of buoys and ropes or nets connecting the buoys to establish an enclosure (or exclosure) to protect an infested area from disturbance. RUAs can be used to prevent access to these infested areas while control practices are being done, and provide the benefit of restricting boating, fishing, and other recreational activities within these areas, so as to prevent fragmentation and spread of the plants outside of the RUA.

Hand-pulling: Hand-pulling exotic aquatic plants is a technique used on both new and existing infestations, as circumstances allow. For this technique divers carefully hand- remove the shoots and roots of plants from infested areas and place the plant material in mesh dive bags for collect and disposal. This technique is suited to small patches or areas of low density exotic plant coverage.

For a new infestation, hand-pulling activities are typically conducted several times during the first season, with follow-up inspections for the next 1-2 years or until no re-growth is observed. For existing infestations, hand-pulling may be done to slow the expansion of plant establishment in a new area or where new stems are removed in a section that may have previously been uninfested. It is often a follow-up technique that is included in most management plans.

In 2007 a new program was created through a cooperative between a volunteer monitor that is a certified dive instructor, and the DES Exotic Species Program. A Weed Control Diver Course (WCD) was developed and approved through the Professional Association of Dive Instructors (PADI) to expand the number of certified divers available to assist with hand-pulling activities. DES has only four certified divers in the Limnology Center to handle problems with aquatic plants, and more help was needed. There is a unique skill involved with hand- removing plants from the lake bottom. If the process is not conducted correctly, fragments could spread to other waterbody locations. For this reason, training and certification are needed to help ensure success. Roughly 100 divers were certified through this program through the 2010 season. DES maintains a list of WCD divers and shares them with waterbody groups and municipalities that seek diver assistance for controlling exotic aquatic plants. Classes are offered two to three times per summer.

Diver Assisted Suction Harvesting Diver Assisted Suction Harvesting (DASH) is an emerging and evolving control technique in New Hampshire. The technique employs divers that perform hand removal actions as described above, however, instead of using a dive bag a mechanical suction device is used to entrain the plants and bring them topside where a tender accumulates and bags the material for disposal. Because of this variation divers are able to work in moderately dense stands of plants that cover more bottom area, with increased efficiency and accuracy.

Mechanical Harvesting The process of mechanical harvesting is conducted by using machines which cut and collect aquatic plants. These machines can cut the plants up to twelve feet below the water surface. The weeds are cut and then collected by the harvester or other separate conveyer-belt driven device where they are stored in the harvester or barge, and then transferred to an upland site.

The advantages of this type of weed control are that cutting and harvesting immediately opens an area such as boat lanes, and it removes the upper portion of the plants. Due to the size of the equipment, mechanical harvesting is limited to water areas of sufficient size and depth. It is important to remember that mechanical harvesting can leave plant fragments in the water, which if not collected, may spread the plant to new areas. Additionally harvesters may impact fish and insect populations in the area by removing them in harvested material. Cutting plant stems too close to the bottom can result in re-suspension of bottom sediments and nutrients. This management option is only recommended when nearly the entire waterbody is infested, and harvesting is needed to open navigation channels through the infested areas.

Benthic Barriers: Benthic barriers are fiberglass coated screening material that can be applied directly to the lake bottom to cover and compress aquatic plant growth. Screening is staked or weighted to the bottom to prevent it from becoming buoyant or drifting with current. The barriers also serve to block sunlight and prevent photosynthesis by the plants, thereby killing the plants with time. While a reliable method for small areas of plants (roughly 100 sq. ft. or less), larger areas are not reasonably controlled with this method due to a variety of factors (labor intensive installation, cost, and gas accumulation and bubbling beneath the barrier).

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Targeted Application of Herbicides:

Application of aquatic herbicides is another tool employed for controlling exotic aquatic plants. Generally, herbicides are used when infestations are too large to be controlled using other alternative non-chemical controls, or if other techniques have been tried and have proven unsuccessful. Each aquatic plant responds differently to different herbicides and concentrations of herbicides, but research performed by the Army Corps of Engineers has isolated target specificity of a variety of aquatic herbicides for different species.

Generally, 2,4-D (Navigate formulation) is the herbicide that is recommended for control of variable milfoil. Based on laboratory data this is the most effective herbicide in selectively controlling variable milfoil in New Hampshire’s waterbodies.

A field trial was performed during the 2008 summer using the herbicide Renovate to control variable milfoil. Renovate is a systemic aquatic herbicide that targets both the shoots and the roots of the target plant for complete control. In this application it was dispersed as a granular formulation that sank quickly to the bottom to areas of active uptake of the milfoil plants. A small (<5 acre) area of Captains Pond in Salem was treated with this systemic herbicide. The herbicide was applied in pellet form to the infested area in May 2008, and showed good control by the end of the growing season. Renovate works a little more slowly to control aquatic plants than 2,4-D and it is a little more expensive, but presents DES with another alternative that could be used in future treatments.

During the summer of 2010, DES worked with other researchers to perform field trials of three different formulations of 2,4-D in Lake Winnisquam, to determine which product was most target-specific to the variable milfoil. Navigate formulation was used, as were a 2,4-D amine formulation, and a 2,4- D amine and triclopyr formulation (MaxG).

Another herbicide, Fluridone, is sometimes also used in New Hampshire, mainly to control growths of fanwort (Cabomba caroliniana). Fluridone is a systemic aquatic herbicide that inhibits the formation of carotenoids in plants. Reduced carotenoids pigment ultimately results in the breakdown of chlorophyll and subsequent loss of photosynthetic function of the plants.

Other aquatic herbicides are also used in New Hampshire when appropriate (glyphosate, copper compounds, etc). The product of choice will be recommended based on what the target species is, and other waterbody-specific characteristics that are important to consider when selecting a product.

In 2018, a new aquatic formulation of an herbicide was labeled and licensed for use. ProcellaCOR is a reduced-risk liquid formulation herbicide that is a systemic. Based on New Hampshire field data, it works well on variable milfoil, it is taken up very quickly following treatment (hours) and it degrades quickly in the water column, with typical non-detect readings within 24-48 hours post treatment.

Extended Drawdown Extended drawdown serves to expose submersed aquatic plants to dessication and scouring from ice (if in winter), physically breaking down plant tissue. Some species can respond well to drawdown and plant density can be reduced, but for invasive species drawdown tends to yield more disturbance to bottom sediments, something to which exotic plants are most adapted. In waterbodies where drawdown is conducted exotic plants can often outcompete native plants for habitat and come to dominate the system.

Some waterbodies that are heavily infested with exotic plants do conduct drawdowns to reduce some of the invasive aquatic plant density. During this reporting period both Northwood Lake (Northwood) and Jones Pond (New Durham) coordinated deep winter drawdowns to reduce growths of variable milfoil (the drawdown on Northwood Lake is primarily for flood control purposes, but they do see some ancillary benefits from the technique for variable milfoil control).

Dredging Dredging is a means of physical removal of aquatic plants from the bottom sediments using a floating or land-based dredge. Dredging can create a variety of depth gradients creating multiple plant environments allowing for greater diversity in lakes plant, fish, and wildlife communities. However due to the cost, potential environmental effects, and the problem of sediment disposal, dredging is rarely used for control of aquatic vegetation alone.

Dredging can take place in to fashion, including drawdown followed by mechanical dredging using an excavator, or using a diver-operated suction dredge while the water level remains up.

Biological Control There are no approved biological controls for submersed exotic aquatic plant at this time in New Hampshire.

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References

Department of Environmental Services. 2006: 2006 Section 305(b) and 303(d) Consolidated Assessment and Listing Methodology. November 2005. New Hampshire Department of Environmental Services. NHDES-R-WD-05- 29. Available at http://des.nh.gov/WMB/swqa/calm.html

Halstead, J.M., J. Michaud, S. Hallas-Burt, and J.P. Gibbs. 2003. “An Hedonic Analysis of Effects of a Nonative Invader (Myriophyllum heterophyllum) on New Hampshire (USA) Lakefront Properties.” Environmental Management. 32 (3): 391 – 398

Luken, J.O. and J.W. Thieret. 1997. Assessment and Management of Plant Invasions. Springer-Verlag, New York. 324 pages.