Addendum_1_RFP DES 2025-02.pdf

Little Bog Pond Dam & Lower Trio Pond Dam

Reconstruction Project

Addendum #1

Please find the following ADDENDUM #1, dated August 14th, 2024, for the Little Bog Pond Dam & Lower

Trio Pond Dam Reconstruction Project which is to be included as part of the Contract Documents thereof.

As per Specification Section 00200, Article 13.09 the bid shall contain an acknowledgment of receipt of this

Addendum #1, (and all addenda). The number and date of which shall be filled in by filling out the information in the space provided in Section 00301 – Bid Form, Article 3 – 3.01A.

Please note bids are due Thursday, September 5, 2024, at 2:00 PM (EST). Hard copy bids may be received as stipulated in the Contract Documents. This Addendum has been issued to address clarifications in the Contract

Specifications as well as address Prospective Contractor Questions after the August 7, 2024, Pre-Bid Meeting:

ITEM #1: Meeting Purpose: Mandatory pre-bid site walk for Little Bog and Lower Trio Ponds Dam

Reconstruction Project with potential bidders to review pertinent project details and resolve any questions bidders may have. Notes from the site walk and discussions are summarized below.

Meeting Attendees (Sign-In Sheet included as Attachment #1):

Joshua Jacak, GEI Consultants Eric DeFelice, DeFelice Corp.

Jim Nickerson, GEI Consultants Cody Williams, New England Infrastructure

Michael Timmins, NHDES William Linsky, Charter

Charlie Krautmann, NHDES Bill Peach, T Ford

Maggie Machinist, DNCR Jim Black, Michels

Clemente Vanas, Kingsbury Co.

1. Introductions and Project Overview

2. Laydown Areas

• NHDES to will clear all trees in laydown areas shown on Contract Drawings in Fall of 2024.

NHDES will remove timber but leave stumps. The contractor will be responsible for stump removal.

• Contractor responsible for any clearing adjacent to the dam work.

3. Site Access

• Contract documents currently state the mobilization may commence on May 5th, 2025. After further discussions the Contractor will be able to mobilize on May 19th, 2025, with the possibility to start one or two weeks earlier pending road conditions and approval by NHDES. The access to Nash

Stream will be closed after the first week of December 2025. The contractor will be responsible for any snow removal in the fall of 2025 (October, November and December) to access the site.

Punchlist items can be completed the following spring from May 2026 through June 2026.

• Accessing the site the first two weeks of May will depend on winter snowfall amounts and conditions of access road in spring. Condition of roadway will need to be documented prior to commencing construction activities. Any damage to roadway will be responsibility of contractor to repair.

• Emerson Road, which is the primary access to Nash Stream Road, is maintained by the Town of

Stark. This road may be posted in the first few weeks of May for oversized loads to reduce frost heaves. At the Contractor’s discretion, they can seek a waiver from the Town of Stark if the road is posted but will need to post an insurance bond with the Town to use heavy equipment on this road.

Spring conditions vary and sometimes the posting is lifted at the end of April.

4. Work Hours

• Contract documents currently state work hours are to be Monday – Friday 7 A.M. to 6 P.M.

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• After discussions we are proposing to change working hours to be Monday – Friday 6 A.M. to 8

P.M., and Saturday 8 A.M. to 6 P.M. with Sunday work allowed with prior approval by RPR and

NHDES.

5. Cofferdam Construction/Construction Sequence

• Clarification that cofferdam does not need to be a Port-A-Dam and other alternative will be considered.

• Alternative means to provide bypass flows will also be considered.

o Excavation plan as shown in Contractor drawings is a suggestion and could be expanded to allow any bypass piping to run adjacent to new spillway footprint and construct spillway in one phase.

• Means and methods of cofferdam construction are ultimately up to the Contractor. Any plan will need to be approved by RPR and NHDES.

• NHDES will draw down ponds during Fall of 2024.

o At Little Bog Pond NHDES will remove/excavate boulders within the spillway and lower impoundment approximately four to five feet. The Contractor may have to remove an additional one to two feet to achieve elevation 2036.0 per the contract drawings.

o At Lower Trio NHDES will remove existing stop logs which will draw down the impoundment to the upstream toe of the embankment. Additional drawdown may have to occur in the spring and/or summer of 2025 to achieve elevation 2305.0 per the contract drawings.

6. Reuse of On-Site Riprap

• The Contractor is to reuse as many existing boulders on-site as possible. Some boulders will need to be broken mechanically to achieve the riprap specification.

• Assume excess boulders will be removed from the site by the Contractor. Coordinated with the

RPR/Owner before removal for possible alternate use on-site.

7. Access Road

• Contractors responsible for minimum improvements needed to get equipment up to Lower Trio

Pond Dam.

8. Bidding Process

• Bids Due September 5th by 2 P.M. EST

• Notice to Proceed provided at latest in December 2024

9. Prevailing Wages

• The expected total cost of the project is estimated to be less than $10 million and therefore Section

00805 Article 3 SC-103.06a I. Federal Requirements is not applicable. The Engineer’s Estimate will not be provided to bidders.

10. Buy America Requirement

• There is a requirement for Contractor to make best effort to buy American, but it is not required.

ITEM #2: Revised seed mix called out in specification Section 32 92 19 2.03A and B and on drawings C-109, C-110, C-209, and C-210 in response to discussions with New Hampshire Natural Heritage Bureau. Updated drawings sheets and spec language is included as Attachment #2.

ITEM #3: Response to Contractor Questions

1. Will NHDES consider a 1 week bid date extension to 9/12/2024? No.

2. Will the concrete pad shown on sheet C‐103 detail A, require removal at the completion of the project? Concrete pad is to be left in place.

3. Will an on‐site location be provided for disposal of surplus soils, rock, brush and stumps? No, Contractor to assume all excess material will be hauled off-site for disposal.

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4. Can the CAD file be provided for use during the bid preparation? No.

5. Please confirm both Dams can be worked simultaneously. Yes, work on both dams can be preformed concurrently.

6. During the site walk it was discussed that the Contractor has the option of moving the cofferdams closer to t he dams, to alleviate the retained height of the water. If this is required because of limitations with the Porta

‐Dam then will GEI revise the limits of grading to coincide with the Porta‐Dam relocation? See additonal

Cofferdam Dam notes provided under ITEM #1. Grading limits as shown on Contract Drawings will not be revised. Slope of proposed dam embankment needs to remain at 2.5:1.

7. Please confirm that the Contractor can enter the pond to remove obstructions for the installation of the Porta‐

Dam. Contractor is permitted to work within the Limits of Work as shown on the Contract Drawings, including areas within the pond as needed for installation of cofferdams.

8. Please confirm that should the temporary measures fail due to a storm in excess of the design by GEI, then it will be considered an act of God and the Contractor shall be held harmless. The drawings show a concept for control of water and the minimum requirements for the Contractor perform a delegated design of the cofferdam. Means and methods of cofferdam design and construction are ultimately up to the

Contractor.

9. Please confirm the 24" pipes can be installed outside the reconstructed spillway allowing the entire structure to be built in one phase. Yes, see additonal Cofferdam Dam notes provided under ITEM #1.

10. Please confirm if weekend work is allowed. Yes, see response provided under ITEM #1.

11. Please confirm that the Owner/Engineer do not require a trailer. Owner/Engineer does not need trailer on-site. The Contractors trailer/facility shall be large enough to accommodate on-site meetings and office space for the RPR for duration of construction.

12. Please confirm limits of tree clearing by DES. See response provided under ITEM #1.

13. Please confirm that the proposed design for Lower Trio Road does not need to be constructed. All that is ne eded is for the Contractor to be able to access the work area as needed with materials and equipment. As stated under Item #1, Contractors is responsible for minimum improvements needed to get materials, equipment, and personnel up to Lower Trio Pond Dam.

14. Please confirm if Title is available for the disposal of the box truck. If not, then how to proceed. Title is not available for box truck and owner is unknown. Follow procedures outlined in State of New

Hampshire Title and Anti-Theft Handbook.

15. Please confirm that the Project is not required to follow the "Buy American" regulations. See response provided under ITEM #1.

16. Based upon observations made during the site walk, and due to a lack of subsurface investigations, will NH

DES revise the Bid Form to provide an item for Rock Removal, including ledge and boulders within the req uired excavations? As outlined in the Spec Section 01 20 00: Measurement and Payment, removal and stockpiling of existing boulders is to be paid for under “General Site Demolition”.

Attachments:

Attachment #1 – Pre-Bid Meeting Sign-In Sheet

Attachment #2 – Updated Drawings Sheets and Specifications

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Attachment #1

Pre-Bid Meeting Sign-In Sheet

Attachment #2

Updated Drawings Sheets and Specifications

NHDES – Dams Bureau Little Bog Pond and Lower Trio Pond

Dam Reconstruction

SECTION 32 92 19

LOAMING, SEEDING, AND REVEGETATION

PART 1 GENERAL

1.01 WORK INCLUDES

A. The Work under this Section includes the furnishing of all labor, equipment, supplies, and materials for loaming, seeding, revegetating, and related items, as indicated on the drawings and/or as specified herein asfollows:

1. Loam

2. Seeding

3. Fertilizing (using low phosphate, slow-release fertilizeronly)

4. Temporary Erosion Protection

5. Maintenance

B. The Work of this item covers loaming and seeding operations, as well as prior preparation and subsequent conditioning (fertilizer and erosion protection) and maintenance, at all locations where fill is placed, excavations made, or existing vegetation is disturbed.

C. The performance of this work shall be judged by the establishment of appropriate ground cover, as specified, in the indicated areas. The CONTRACTOR shall be responsible for the watering and other proper care of the seeded areas until final acceptance.

D. The CONTRACTOR shall supply acceptable weed-free loam from off-site sources as applicable to supplement that which was generated from onsite stripping activity and judged suitable for re-use in the work by the RPR.

E. In general, the work shall consist of all loaming, seeding, and revegetation necessary to prepare all areas on the site for revegetation, seeding with approved seed mix, conditioning and fertilizing the soil as required, protecting the area from erosion through the use of mulch or biodegradable blankets, and maintaining the seeded areas (watering, etc.) until the vegetation is well established. The CONTRACTOR shall be responsible for all maintenance and repair of loam and seeded areas until final acceptance. The

CONTRACTOR shall loam, seed, and revegetate all areas where construction shall take place as shown on the Contract Drawings, as well as any other areas necessary for the

Work of the Contract (with approval from the RPR). The CONTRACTOR shall perform

ALL necessary loaming, seeding, and revegetation at all locations on thesite.

F. Loaming, seeding, and revegetation of areas disturbed by the CONTRACTOR but beyond the limits of work shown on the Contract Drawings shall be executed as per this Section but shall be paid for under the separate pay item for Site Restoration.

1.02 PROTECTION

A. Because the project is located adjacent to and within the outlet channel of Little Bog and

Lower Trio Ponds and other wetland areas adjacent to the Ponds and channel shoreline/banks, it is critical that no fertilizers or other chemicals be allowed to reach open water or stream areas.

100% Design Submittal Loaming, Seeding, Revegetation

June 2024 32 92 19-1

In accordance with the New Hampshire Shoreland Water Quality Protection Act

(NH RSA 483-B:9(d), no fertilizer shall be applied to vegetation or soils located within 25 feet of the reference line of any public water. Beyond 25 feet, slow or controlled release fertilizer, as defined by rules adopted by the department

(NHDES), may be used. See Paragraph 2.04.A below for additional information on acceptable fertilizer.

DO NOT over-fertilize and take care that runoff containing fertilizer does not enter the

Lake or downstream outlet channels. NO herbicides, pesticides, or similar chemicals will be allowed at the site. Fertilizers must be approved prior to application and shall not contain herbicides or pesticides.

1.03 SUBMITTALS

A. The CONTRACTOR shall submit to the RPR for review and approval, the following information a minimum of eight (14) days in advance of starting any loaming, seeding, and revegetation operations. Provide composition, test data, Manufacturer’s information, and/or source of following material:

1. Soil Chemistry Test Results

2. Off-site loam material

3. Seed (including certification of weed content)

4. Limestone

5. Fertilizer

6. Compost

7. Mulch and/or Erosion Protection Blanket material

PART 2 PRODUCTS

2.01 LOAM

A. Loam, to be furnished from sources outside of the project limits, shall consist of loose, friable, sandy loam, or loam, free of admixture of subsoil, refuse, stumps, rocks, brush, weeds and other materials which will prevent the formation of a suitable seed bed. No stones in excess of one and one-quarter inch (1-1/4") in diameter will be tolerated. The soils shall conform to the following gradation:

Sieve Size Percent Finer by Weight

1-inch 90-100%

No. 4 70-95%

No. 40 30-85%

No. 100 25-50%

No. 200 20-40%

(No more than 15 percent of loam shall be clay)

June 2024 32 92 19-2

Mixing of any on-site peat and mineral soils to make loam is acceptable. The product shall meet the requirements loam above.

The CONTRACTOR shall notify the RPR of the location of the source of supply for the loam at least ten days prior to delivery of the loam to the project site. Any imported materials which do not meet the above requirements shall be rejected and removed from the site.

The loam shall contain at least 10%, but not more than 20%, organic material as determined by the loss during ignition of oven-dried samples. Test samples shall be dried to a constant weight at a temperature of 221°F ± 5°F. Loam shall be amended with well-cured compost as necessary to achieve minimum 10% organic content.

Loam shall not have greater than 500 ppm salt.

B. Testing Requirement:

All loam shall, at the CONTRACTOR’s expense, be subjected to a Standard Soil Test with Organic Matter which shall include reporting of the following parameters: pH, Buffer pH, Extractable Nutrients, Extractable Heavy Metals (e.g. Lead), Cation Exchange

Capacity, Percent Base Saturation, Percent Organic Matter, and Total Soil Nitrogen. The laboratory test results shall provide recommendations for nutrient and pH adjustments.

A minimum of one test shall be performed on each distinct off-site loam source. A standard soil test shall be performed for every 500 CY of loam used at the site.

Soil testing shall be performed at the University of New Hampshire Cooperative

Extension Soil and Plant Tissue Testing Laboratory or other approved accredited Testing

Laboratory.

2.02 COMPOST

A. Compost shall be mature and well cured (4-6 months curing after completion of thermophillic compost process) and moderately screened. It shall have a moisture content that has results in no visible free water or dust produced when handling the material.

B. Compost shall meet the following criteria:

Minimum Maximum

Percent passing 2” 100% --

Percent passing 1” 90% 100%

Percent passing ¾” 70% 100%

Percent passing ¼” 4% 75%

C. Compost pH shall be between 6.0 and 8.5. Manufactured inert material (plastic, metal, etc) shall be less than 0.5% on a dry weight or volume basis, whichever provides the least amount of foreign material. Minimum organic matter shall by 40% dry weight basis as determined by Loss-On-Ignition Matter Method. Soluble salt contents shall be less than

6.0 mmhos/cm. The compost shall be composed of a minimum of 65% by volume recycled plant waste. A maximum of 35% by volume of other approved organic waste

June 2024 32 92 19-3 and/or biosolids may be substituted for recycled plant waste. The supplier shall provide written verification of feedstock sources.

D. Compost shall be certified free of herbicides and other harmful chemicals.

2.03 SEED

A. Wetland Seed Mix: Seed shall be the commercial product of a reputable grower approved by the RPR and shall be certified to be not more than one (1) year old. Seed mixes shall be provided by New England Wetlands Plants, Inc. (NEWPI) or other approved grower/vendor and optimized for the on-site conditions shall be applied where shown on the Contract Drawings. The seed mix proposed for use shall be the New England Erosion

Control/Restoration Mix for Detention Basins and Moist Sites or equivalent. Acceptable

The mix typically contains the following plant species are as follows:

Riverbank Wild Rye (Elymus riparius), Little Bluestem (Schizachyrium scoparium), Big

Bluestem (Andropogon gerardii), Switch Grass (Panicum virgatum), Upland Bentgrass

(Agrostis perennans), Beggar Ticks (Bidens Frondosa ), Spotted Joe Pye Weed

(Eupatorium Maculatum), Nodding Bur Marigold (Bidens cernua), New England Aster

(Aster novae-angliae), Boneset (Eupatorium perfoliatum), Blue Vervain (Verbena hastata), Soft Rush (Juncus effusus), Wool Grass (Scirpus cyperinus)

The following species are to be removed from the standard mix:

Creeping Red Fescue (Festuca rubra), Hollow-Stem Joe Pye Weed (Eupatorium fistulosum/Eutrochium fistulosum), New York Ironweed (Vernonia Noveboracensis)

The loading rate will be 1 pound of NEWPI’s New England Erosion Control/Restoration

Mix for Dry Sites seed mix per 1,250 square feet of seed area or the manufacture’s recommended application rate, whichever is greater.

B. Upland Seed Mix: Seed shall be the commercial product of a reputable grower approved by the RPR and shall be certified to be not more than one (1) year old. Seed mixes shall be provided by New England Wetlands Plants, Inc. (NEWPI) Holland Wildflower

Farm or other approved grower/vendor and optimized for the on-site conditions shall be applied where shown on the Contract Drawings. The seed mix proposed for use shall be the New England Logging Road Mix or equivalent. The mix typical contains the following plant species:

Virginia Wildrye (Elymus virginicus), Switchgrass, Canada Wildrye (Elymus canadensis), Little Bluestem (Schizachyrium scoparium), Switch Grass (Panicum virgatum), Virginia Wild Rye (Elymus virginicus), Big Bluestem (Andropogon gerardii), and Indiangrass (Sorghastrum nutans)Soft Rush (Juncus effusus), Path Rush

(Juncus tenuis), Upland Bentgrass (Agrostis perennans)

The following species are to be removed from the standard mix:

Red Fescue (Festuca rubra), Indian Grass (Sorghastrum nutans), Partridge Pea

(Chamaecrista fasciculata)

The seed mixture for upland areas shall be sown at a minimum rate of one pound (1 lb.)

per one thousand square feet (2,500 sf).2,200 square feet of seed area or the manufacture’s recommended application rate, whichever is greater.

June 2024 32 92 19-4

C. Other seed mixes may be utilized subject to prior approval by the RPR and NHDES.

D. The seed shall be furnished and delivered premixed in the proportions specified above.

All seed shall comply with applicable State and Federal seed laws. A grower's certificate of compliance with the specifications shall be submitted by the grower with the shipment of the seed. The certificate shall include the guaranteed percentage of purity, weed content and germination of the seed, and also the net weight and date of shipment. No seed shall be sown until the CONTRACTOR has submitted the certificate to the RPR.

2.04 FERTILIZER

Fertilizer shall be furnished in containers plainly marked with chemical analysis of the product and showing one of the following compositions by weight. In accordance with

NH RSA 438, it shall be a low phosphate, slow-release nitrogen guaranteed as indicated on the label to contain:

1. Not more than 2% Phosphorus; and

2. A Nitrogen component which is at least 50% slow-release Nitrogen components.

B. No fertilizer except limestone shall be applied within 25 feet of any surface water body.

2.05 LIMESTONE

A. Limestone shall consist of pulverized limestone obtained by grinding either calcareous or dolomitic limestone so that ninety-five percent (95%) of the material will pass a No. 20 sieve and at least fifty percent (50%) will pass a No. 100 sieve and shall have a satisfactory neutralizingvalue.

2.06 EROSION CONTROL BLANKET

A. Erosion control blankets shall be appropriate for use on slopes where mulch is not stable.

The erosion protection blankets shall be for temporary application and shall be biodegradable and non-toxic. Materials such as jute, coir fiber, and mattresses with straw matrices are judged acceptable, provided no other unsuitable material is included. All erosion control products should be new and previously unused and free of weed and other undesirable seeds. The purposeof these materials is to provide temporary erosion control during the period of establishment of the underlying grass. The blankets shall allow for the growth of grass seeded under the blankets.

B. Erosion control blankets anchors shall be compatible with the blanket material and shall be of wooden or other biodegradablematerial.

2.07 MULCH

A. Mulch used in this project shall be straw free from weeds or coarse matter. A sample shall be submitted. Hay mulch shall not beallowed.

B. Special care shall be taken to ensure that mulch imported to the site is free from invasive wetland species seeds or plant matter.

June 2024 32 92 19-5

PART 3 EXECUTION

3.01 LOAM

A. Loam shall be amended in accordance with the recommendations of the Testing

Laboratory provided in their report and in accordance with thesespecifications.

B. Loam shall be spread on the designated areas so as to form a cover of loam to a minimum depth of six (6) inches unless otherwise shown on the drawings or directed by the RPR.

Areas designated for covering with loam shall be scarified or otherwise roughened, just prior to the application of loam. After the spreading of loam all stiff clods, hard lumps, large stones, trash, wood, brush, stumps, roots, or other objectionable material shall be gathered and removed from loamed area. Compaction may be accomplished by the use of a lawn roller commonly used for this work.

C. Promptly fertilize, seed, mulch, or otherwise cover, and stabilize through tracking with suitable equipment any loam placed on grades steeper than 5 percent.

3.02 APPLICATION RATES OF LIMESTONE, FERTILIZER AND SEED

A. Prepared soils shall be collected and submitted to the approved testing for testing in accordance with their guidelines. At a minimum, the soil shall be tested as per the requirements in Paragraph 2.01 of this Section. Soils shall be treated in accordance with the recommendations of the Testing Laboratory provided in their report.

B. Limestone, if required by the results of soil testing, shall be applied and thoroughly incorporated in the layer of loam to adjust the acidity of thematerial. Typical limestone application rates in the area have been on the order of one hundred and thirty-five pounds

(135 lbs.) per thousand square foot (1,000 sq. ft.); however, the results of the test shall dictate the rate of limestone application.

C. Fertilizer, if required by the results of soil testing, shall be raked to a depth of at least two inches (2") and the area brought to a smooth surface. Typical fertilizer application rates in the area have been on the order of seven and one-half pounds (7.5 lbs.) per one thousand square feet (1,000 sf); however, the results of the test shall dictate the rate of fertilizer application.

D. Limestone and/or fertilizer shall be mixed thoroughly into the loam seedbed during preparation and prior to seeding. Mixing shall be accomplished through disking or similar method.

E. Compost, if required, may be incorporated into the loam prior to spreading or following spreading. Application rate should be as required to achieve a minimum or 10% organic matter. Typically, this can be achieved by applying a 2- to 4-inch depth of compost on top of the spread loam and thoroughly incorporating the compost into the upper six (6) inches of soil. Wide-tracked equipment must be used to avoid compaction of thesoil.

F. Mulch shall be applied at a rate of seventy to ninety pounds (70-90 lbs) per one thousand square feet (1,000 sf). As an alternative to mulch, or if mulch is found to be ineffective in preventing erosion prior to vegetation establishment, erosion control blankets may be installed as per the manufacture’srecommendations.

3.03 TIME OF SEEDING

A. The recommended seeding periods are from April 1 to June 1, and from August 15 to

October 1. The CONTRACTOR may seed at other times. Regardless of the time of

June 2024 32 92 19-6 seeding, the CONTRACTOR shall be responsible for a full establishment of vegetation.

When directed, areas in the project which do not develop satisfactory growth shall be re-fertilized and reseeded. Re-fertilizing the reseeding shall be incidental to the original seeding item requirements. All seeding must be completed by October 15, unless authorization is obtained from the RPR.

B. Dormant seeding after October 15 shall be allowed, however, seed application rate shall be doubled.

3.04 FERTILIZING AND LIMING

A. Fertilizing and liming shall be done when the soil is in a moist condition and at least twenty-four (24) hours before the sowing of seed. The fertilizer and lime shall be applied to the soil by means of a mechanical spreader or other approved method capable of maintaining a uniform rate of application and shall be thoroughly harrowed, raked or otherwise mixed with the soil to a depth of not less than one (1) inch. The fertilizer and lime shall not be applied together. If the limestone and fertilizer are applied dry, the limestone shall precede the fertilizer and shall be worked thoroughly into the soil before the fertilizer is spread.

B. Extreme care shall be taken by the CONTRACTOR so as not to introduce fertilizer into the Lake, outlet channel or other waterways. Over-fertilization will not be allowed.

3.05 SOWING SEED

A. Seed of the required mixture and quality shall be spread by a mechanical seeder or other method which sow the seed uniformly at the required rate over the entire area to be seeded. The mechanical seeder shall be capable of being operated to avoid the growth of vegetation in rows and shall be so operated. After seeding, all areas shall be lightly raked by hand to mix the seed and loam. Seeded areas shall be rolled with a lawn roller not to exceed one hundred and twenty pounds (120 lbs.) in weight.

3.06 TEMPORARY EROSION CONTROL BLANKET INSTALLATION

A. Erosion control blankets shall be installed over all areas of revegetation where slopes exceed 3:1 (H:V). The downstream slope of the re-shaped outlet channel banks will require an erosion control blanket(s).

B. Protection of seeded areas shall be either through the installation of temporary biodegradable erosion control blankets or the application of mulch. Temporary erosion control blankets may be necessary if mulch is found to be ineffective in controlling erosion prior to the establishment of vegetation.

C. Temporary erosion control blankets shall be installed as per the manufacturer’s instructions and recommendations. In general, such blankets are installed down

(perpendicular to) slopes and are anchored in a shallow trench at the top of the slope.

D. All temporary erosion control blankets must be anchored to the ground by the use of stakes, as per the manufacturer’s instructions and recommendations. In general, stakes should be placed in staggered rows on 2- to 3-foot centers. Stakes should be long enough to achieve adequate anchorage.

3.07 MULCHING

A. Protection of seeded areas shall be either through the application of mulch or the installation of temporary biodegradable erosion control blankets.

June 2024 32 92 19-7

B. Areas which have been seeded shall be mulched immediately following seeding. Areas which cannot be seeded within the specified seeding periods shall be mulched to provide temporary protection to the soil surface. Mulch shall be spread with a mulch blower or by hand. Mulch shall be immediately anchored with a mulch-anchoring tool (operated perpendicular to the contour) or by tracking with a tracked vehicle (operated parallel to the contour). Applying mulch simultaneous to seeding in a hydroseeding operation is acceptable.

C. Straw mulch shall be applied to seeded areas at a rate of ten (10) pounds per one hundred

(100) square feet. The rate shall be doubled for unseeded areas.

3.08 MAINTENANCE

A. The CONTRACTOR shall be responsible for the watering and other proper care of the seeded areas until final acceptance. If seeded areas have not established by the end of the

Fall growing season, the maintenance period shall extend through the following Spring.

3.09 REPAIR

A. The CONTRACTOR shall be responsible for repair of all damage to and erosion of the loamed and seeded areas until final acceptance by the RPR and NHDES. Repair responsibilities shall include, but not be limited to, repair of eroded areas, reseeding, replacement of erosion control measures, regrading, etc. The intent is to facilitate the establishment of an adequate ground cover over all disturbed areas on the site. If seeded areas have not established by the end of the Fall growing season, the period during which the CONTRACTOR is responsible for repairs shall extend through the following Spring.

3.10 ACCEPTANCE

A. Seeded area final stabilization shall be considered complete when all soil-disturbing activities have been completed and a uniform, perennial vegetative cover with a density of eighty percent has been established or equivalent stabilization measures (such as the use of mulches or erosion control matting) have been employed on all unpaved areas not covered by permanent structures. achievement of final stabilization shall be determined by NHDES.

B. The CONTRACTOR is responsible for ensuring that a satisfactory firm stand of vegetation is obtained and shall do all necessary re-loaming, re-fertilizing and reseeding and make all necessary repairs, regardless of cause of damage, to this effect until final acceptance of the project.

C. If seeded areas have not established and been accepted by the end of the Fall growing season, the RPR and NHDES will defer evaluation for acceptance until the following

Spring.

END OF SECTION

June 2024 32 92 19-8

Approved By:

30 20

LITTLE BOG POND

WSEL 2041.75

07/30/2023

ACB BOAT RAMP

NOTES:

1. ALL AREAS DURING CONSTRUCTION MUST BE PERMANENTLY STABILIZED

WITHIN 5 CALENDAR DAYS OF FINAL GRADING (GRADE LISTED ON PLAN).

APPROPRIATE VEGETATIVE SOIL STABILIZATION IS TO BE USED TO

MINIMIZE EROSION. TEMPORARY AND PERMANENT VEGETATIVE COVER IS

TO BE ESTABLISHED IN ACCORDANCE WITH THE PROJECT PLANS AND

SPECIFICATIONS, USING HYDRO-SEEDING, BROADCASTING, OR OTHER

APPROVED TECHNIQUES.

2. ALL DISTURBED AREAS TO RECEIVE 6-INCHES OF LOAM, SPECIFIED SEED

MIX, AND THEN MULCHED WITH STRAW, WOOD CHIPS, OR OTHER

APPROVED WEED-FREE MATERIAL. BIO OR PHOTO-DEGRADABLE

EROSION FABRIC IS ALSO ACCEPTABLE FOR POST-RESTORATION

STABILIZATION. ON FLAT SURFACES AND ON SLOPES OF 3:1 OR FLATTER,

MULCH OR EROSION CONTROL MATTING SHALL BE USED AFTER FINAL

SEEDING TO PROTECT FROM THE IMPACT OF RAIN AND TO INCREASE THE

CAPACITY OF THE SOIL TO ABSORB WATER. FOR STEEPER SLOPES (I.E.

GREATER THAN 3:1), EROSION CONTROL MATTING SHALL BE USED.

3. DISTURBED UPLAND AREAS SHALL BE SEEDED WITH AN APPROVED SEED

MIX AT A RATE OF 1 POUNDS OF LIVE SEED PER 2,200 S.F. SEEDING RATE

SHALL BE DOUBLED FOR DORMANT SEEDING. SEED MIX FOR UPLAND

AREAS SHALL BE AS FOLLOWS FROM NEW ENGLAND WETLAND PLANTS

OR AS APPROVED BY RPR:

THE NEW ENGLAND LOGGING ROAD MIX OR APPROVED EQUAL WITH THE

FOLLOWING PLANT MIX:

LITTLE BLUESTEM (SCHIZACHYRIUM SCOPARIUM)

SWITCH GRASS (PANICUM VIRGATUM)

VIRGINIA WILD RYE (ELYMUS VIRGINICUS)

BIG BLUESTEM (ANDROPOGON GERARDII)

SOFT RUSH (JUNCUS EFFUSUS)

PATH RUSH (JUNCUS TENUIS)

UPLAND BENTGRASS (AGROSTIS PERENNANS)

WITH THE FOLLOWING SPECIES REMOVED FROM THE STANDARD MIX:

RED FESCUE (FESTUCA RUBRA)

INDIAN GRASS (SORGHASTRUM NUTANS)

PARTRIDGE PEA (CHAMAECRISTA FASCICULATA)

4. DISTURBED WETLAND AREAS SHALL BE SEEDED WITH AN APPROVED

SEED MIX AT A RATE OF 1 POUND OF LIVE SEED PER 1,250 S.F. SEEDING

RATE SHALL BE DOUBLE FOR DORMANT SEEDING. SEED MIX FOR

WETLAND AREAS SHALL BE AS FOLLOWS FROM NEW ENGLAND WETLAND

PLANTS OR AS APPROVED BY RPR:

THE NEW ENGLAND EROSION CONTROL/RESTORATION MIX FOR

DETENTION BASINS AND MOIST SITES OR APPROVED EQUAL WITH

FOLLOWING PLANT MIX:

RIVERBANK WILD RYE (ELYMUS RIPARIUS)

LITTLE BLUESTEM (SCHIZACHYRIUM SCOPARIUM)

BIG BLUESTEM (ANDROPOGON GERARDII)

SWITCH GRASS (PANICUM VIRGATUM)

UPLAND BENTGRASS (AGROSTIS PERENNANS)

BEGGAR TICKS (BIDENS FRONDOSA )

SPOTTED JOE PYE WEED (EUPATORIUM MACULATUM)

NODDING BUR MARIGOLD (BIDENS CERNUA)

NEW ENGLAND ASTER (ASTER NOVAE-ANGLIAE)

BONESET (EUPATORIUM PERFOLIATUM)

BLUE VERVAIN (VERBENA HASTATA)

SOFT RUSH (JUNCUS EFFUSUS)

WOOL GRASS (SCIRPUS CYPERINUS)

WITH THE FOLLOWING SPECIES REMOVED FROM THE STANDARD MIX:

CREEPING RED FESCUE (FESTUCA RUBRA)

HOLLOW-STEM JOE PYE WEED (EUPATORIUM FISTULOSUM/EUTROCHIUM FISTULOSUM)

NEW YORK IRONWEED (VERNONIA NOVEBORACENSIS)

5. ALL SLOPES AND HIGHLY EROSIVE AREAS MUST BE HYDROSEEDED AND

MULCHED AS NEEDED WHEN CONSTRUCTION ACTIVITY IS STOPPED FOR

GREATER THAN 2 WEEKS.

6. SEED AND MULCH IS TO BE INSPECTED DAILY FOLLOWING EACH RAIN

EVENT TO DETERMINE IF CONCENTRATED FLOWS ARE PRESENT. IN THE

EVENT THAT SEED AND MULCH ARE REMOVED BY EROSIVE RUNOFF,

REPAIRS ARE TO BE MADE IMMEDIATELY.

7. FINAL STABILIZATION SHALL BE CONSIDERED COMPLETE WHEN ALL

SOIL-DISTURBING ACTIVITIES HAVE BEEN COMPLETED AND A

UNIFORM,PERENNIAL VEGETATIVE COVER WITH A DENSITY OF EIGHTY

PERCENT HAS BEEN ESTABLISHED OR EQUIVALENT STABILIZATION

MEASURES (SUCH AS THE USE OF MULCHES OR EROSION CONTROL

MATTING) HAVE BEEN EMPLOYED ON ALL UNPAVED AREAS NOT

COVERED BY PERMANENT STRUCTURES. ACHIEVEMENT OF FINAL

STABILIZATION SHALL BE DETERMINED BY THE OWNER.

8. THE CONTRACTOR SHALL BE RESPONSIBLE FOR MAINTENANCE OF ALL

VEGETATED SURFACES, INCLUDING WATERING, FERTILIZING, AND

RE-SEEDING UNTIL ESTABLISHMENT CONDITIONS ARE MET AND UNTIL

THE END OF THE CONTRACTUAL MAINTENANCE PERIOD AS OUTLINED IN

THE SPECIFICATIONS.

9. NO FOOT OR VEHICULAR TRAFFIC IS ALLOWED IN NEWLY SEEDED AREAS

EXCEPT FOR THAT NEEDED FOR MAINTENANCE.

0+00 1+00

EMBANKMENT ALIGNMENT

SPILLWAY

LOAM AND SEED WITH

UPLAND SEED MIX

LIMITS OF DISTURBANCE

RIPRAP (TYP.)

POND BROOK

FLOW

Attention:

0 1"

If this scale bar does not measure 1" then drawing is not original scale.

1 8/09/2024 ADDENDUM #1 JFN

2 6/28/2024 100% DESIGN DRAWINGS JFN

1 5/31/2024 90% DESIGN DRAWINGS JFN

0 3/15/2024 60% DESIGN DRAWINGS JFN

NO. DATE ISSUE/REVISION APP

RESTORATION PLAN

0 10 20

SCALE, FEET

Consultants

GEI CONSULTANTS, INC.

400 UNICORN PARK DRIVE

WOBURN, MA 01801

(781)721-4000

NEW HAMPSHIRE

DEPARTMENT OF

ENVIRONMENTAL

SERVICES

GEI Project 2204640 ---- \\geiconsultants.com\data\Data_Storage\Working\NEW HAMPSHIRE DES\2204640 State Owned Dam Technical Support\00_CAD\Design\Sheets\Little Bog Dam\C-109-C-110_Restoration Plan.dwg

Designed: J. Jacak

Checked: J. Nickerson

GEI CONSULTANTS OF MICHIGAN, P.C.

Drawn: E. Horvath

J. Nickerson

Approved By:

1+00

0+00

UPON PROJECT COMPLETION

CONTRACTOR TO INSTALL LARGE

TRIO PONDS ROAD ALIGNMENT BOULDERS BLOCKING OFF

ENTRANCE OF LAYDOWN AREA

EDGE OF ROADWAY

NOTES:

1. ALL AREAS DURING CONSTRUCTION MUST BE PERMANENTLY STABILIZED WITHIN 5

CALENDAR DAYS OF FINAL GRADING (GRADE LISTED ON PLAN). APPROPRIATE

VEGETATIVE SOIL STABILIZATION IS TO BE USED TO MINIMIZE EROSION.

TEMPORARY AND PERMANENT VEGETATIVE COVER IS TO BE ESTABLISHED IN

ACCORDANCE WITH THE PROJECT PLANS AND SPECIFICATIONS, USING

HYDRO-SEEDING, BROADCASTING, OR OTHER APPROVED TECHNIQUES.

2. ALL DISTURBED AREAS TO RECEIVE 6-INCHES OF LOAM, SPECIFIED SEED MIX, AND

THEN MULCHED WITH STRAW, WOOD CHIPS, OR OTHER APPROVED WEED-FREE

MATERIAL. BIO OR PHOTO-DEGRADABLE EROSION FABRIC IS ALSO ACCEPTABLE

FOR POST-RESTORATION STABILIZATION. ON FLAT SURFACES AND ON SLOPES OF

3:1 OR FLATTER, MULCH OR EROSION CONTROL MATTING SHALL BE USED AFTER

FINAL SEEDING TO PROTECT FROM THE IMPACT OF RAIN AND TO INCREASE THE

CAPACITY OF THE SOIL TO ABSORB WATER. FOR STEEPER SLOPES (I.E. GREATER

THAN 3:1), EROSION CONTROL MATTING SHALL BE USED.

3. DISTURBED UPLAND AREAS SHALL BE SEEDED WITH AN APPROVED SEED MIX AT A

RATE OF 1 POUNDS OF LIVE SEED PER 2,200 S.F. SEEDING RATE SHALL BE

DOUBLED FOR DORMANT SEEDING. SEED MIX FOR UPLAND AREAS SHALL BE AS

FOLLOWS FROM NEW ENGLAND WETLAND PLANTS OR AS APPROVED BY RPR:

THE NEW ENGLAND LOGGING ROAD MIX OR APPROVED EQUAL WITH THE

FOLLOWING PLANT MIX:

LITTLE BLUESTEM (SCHIZACHYRIUM SCOPARIUM)

SWITCH GRASS (PANICUM VIRGATUM)

VIRGINIA WILD RYE (ELYMUS VIRGINICUS)

BIG BLUESTEM (ANDROPOGON GERARDII)

SOFT RUSH (JUNCUS EFFUSUS)

PATH RUSH (JUNCUS TENUIS)

UPLAND BENTGRASS (AGROSTIS PERENNANS)

WITH THE FOLLOWING SPECIES REMOVED FROM THE STANDARD MIX:

RED FESCUE (FESTUCA RUBRA)

INDIAN GRASS (SORGHASTRUM NUTANS)

PARTRIDGE PEA (CHAMAECRISTA FASCICULATA)

4. DISTURBED WETLAND AREAS SHALL BE SEEDED WITH AN APPROVED SEED MIX AT

A RATE OF 1 POUND OF LIVE SEED PER 1,250 S.F. SEEDING RATE SHALL BE

DOUBLE FOR DORMANT SEEDING. SEED MIX FOR WETLAND AREAS SHALL BE AS

FOLLOWS FROM NEW ENGLAND WETLAND PLANTS OR AS APPROVED BY RPR:

THE NEW ENGLAND EROSION CONTROL/RESTORATION MIX FOR DETENTION

BASINS AND MOIST SITES OR APPROVED EQUAL WITH FOLLOWING PLANT MIX:

RIVERBANK WILD RYE (ELYMUS RIPARIUS)

LITTLE BLUESTEM (SCHIZACHYRIUM SCOPARIUM)

BIG BLUESTEM (ANDROPOGON GERARDII)

SWITCH GRASS (PANICUM VIRGATUM)

UPLAND BENTGRASS (AGROSTIS PERENNANS)

BEGGAR TICKS (BIDENS FRONDOSA )

SPOTTED JOE PYE WEED (EUPATORIUM MACULATUM)

NODDING BUR MARIGOLD (BIDENS CERNUA)

NEW ENGLAND ASTER (ASTER NOVAE-ANGLIAE)

BONESET (EUPATORIUM PERFOLIATUM)

BLUE VERVAIN (VERBENA HASTATA)

SOFT RUSH (JUNCUS EFFUSUS)

WOOL GRASS (SCIRPUS CYPERINUS)

WITH THE FOLLOWING SPECIES REMOVED FROM THE STANDARD MIX:

CREEPING RED FESCUE (FESTUCA RUBRA)

HOLLOW-STEM JOE PYE WEED (EUPATORIUM FISTULOSUM/EUTROCHIUM FISTULOSUM)

NEW YORK IRONWEED (VERNONIA NOVEBORACENSIS)

5. ALL SLOPES AND HIGHLY EROSIVE AREAS MUST BE HYDROSEEDED AND MULCHED

AS NEEDED WHEN CONSTRUCTION ACTIVITY IS STOPPED FOR GREATER THAN 2

WEEKS.

6. SEED AND MULCH IS TO BE INSPECTED DAILY FOLLOWING EACH RAIN EVENT TO

DETERMINE IF CONCENTRATED FLOWS ARE PRESENT. IN THE EVENT THAT SEED

AND MULCH ARE REMOVED BY EROSIVE RUNOFF, REPAIRS ARE TO BE MADE

IMMEDIATELY.

7. FINAL STABILIZATION SHALL BE CONSIDERED COMPLETE WHEN ALL

SOIL-DISTURBING ACTIVITIES HAVE BEEN COMPLETED AND A UNIFORM,PERENNIAL

VEGETATIVE COVER WITH A DENSITY OF EIGHTY PERCENT HAS BEEN

ESTABLISHED OR EQUIVALENT STABILIZATION MEASURES (SUCH AS THE USE OF

MULCHES OR EROSION CONTROL MATTING) HAVE BEEN EMPLOYED ON ALL

UNPAVED AREAS NOT COVERED BY PERMANENT STRUCTURES. ACHIEVEMENT OF

FINAL STABILIZATION SHALL BE DETERMINED BY THE OWNER.

8. THE CONTRACTOR SHALL BE RESPONSIBLE FOR MAINTENANCE OF ALL

VEGETATED SURFACES, INCLUDING WATERING, FERTILIZING, AND RE-SEEDING

UNTIL ESTABLISHMENT CONDITIONS ARE MET AND UNTIL THE END OF THE

CONTRACTUAL MAINTENANCE PERIOD AS OUTLINED IN THE SPECIFICATIONS.

9. NO FOOT OR VEHICULAR TRAFFIC IS ALLOWED IN NEWLY SEEDED AREAS

EXCEPT FOR THAT NEEDED FOR MAINTENANCE.

RESTORE TEMPORARY STAGING AREA

MIN. 6-IN LOAM AND SEED WITH UPLAND SEED MIX

Attention:

0 1"

If this scale bar does not measure 1" then drawing is not original scale.

1 8/09/2024 ADDENDUM #1 JFN

2 6/28/2024 100% DESIGN DRAWINGS JFN

1 5/31/2024 90% DESIGN DRAWINGS JFN

0 3/15/2024 60% DESIGN DRAWINGS JFN

NO. DATE ISSUE/REVISION APP

RESTORATION PLAN

0 10 20

SCALE, FEET

Consultants

GEI CONSULTANTS, INC.

400 UNICORN PARK DRIVE

WOBURN, MA 01801

(781)721-4000

NEW HAMPSHIRE

DEPARTMENT OF

ENVIRONMENTAL

SERVICES

GEI Project 2204640 ---- \\geiconsultants.com\data\Data_Storage\Working\NEW HAMPSHIRE DES\2204640 State Owned Dam Technical Support\00_CAD\Design\Sheets\Little Bog Dam\C-109-C-110_Restoration Plan.dwg

Designed: J. Jacak

Checked: J. Nickerson

GEI CONSULTANTS OF MICHIGAN, P.C.

+0

+0

RESTORE TEMPORARY STAGING AREA

MIN. 6-IN LOAM AND SEED WITH UPLAND SEED MIX

EDGE OF ROADWAY

UPON PROJECT COMPLETION CONTRACTOR

TO INSTALL LARGE BOULDERS BLOCKING

OFF ENTRANCE OF LAYDOWN AREA

TRIO PONDS ROAD ALIGNMENT

Attention:

0 1"

If this scale bar does not measure 1" then drawing is not original scale.

Consultants

GEI CONSULTANTS, INC.

400 UNICORN PARK DRIVE

WOBURN, MA 01801

(781)721-4000

0 10 20

SCALE, FEET

RESTORATION PLAN

NOTES:

1. ALL AREAS DURING CONSTRUCTION MUST BE PERMANENTLY STABILIZED WITHIN 5

CALENDAR DAYS OF FINAL GRADING (GRADE LISTED ON PLAN). APPROPRIATE

VEGETATIVE SOIL STABILIZATION IS TO BE USED TO MINIMIZE EROSION.

TEMPORARY AND PERMANENT VEGETATIVE COVER IS TO BE ESTABLISHED IN

ACCORDANCE WITH THE PROJECT PLANS AND SPECIFICATIONS, USING

HYDRO-SEEDING, BROADCASTING, OR OTHER APPROVED TECHNIQUES.

2. ALL DISTURBED AREAS TO RECEIVE 6-INCHES OF LOAM, SPECIFIED SEED MIX, AND

THEN MULCHED WITH STRAW, WOOD CHIPS, OR OTHER APPROVED WEED-FREE

MATERIAL. BIO OR PHOTO-DEGRADABLE EROSION FABRIC IS ALSO ACCEPTABLE

FOR POST-RESTORATION STABILIZATION. ON FLAT SURFACES AND ON SLOPES OF

3:1 OR FLATTER, MULCH OR EROSION CONTROL MATTING SHALL BE USED AFTER

FINAL SEEDING TO PROTECT FROM THE IMPACT OF RAIN AND TO INCREASE THE

CAPACITY OF THE SOIL TO ABSORB WATER. FOR STEEPER SLOPES (I.E. GREATER

THAN 3:1), EROSION CONTROL MATTING SHALL BE USED.

3. DISTURBED UPLAND AREAS SHALL BE SEEDED WITH AN APPROVED SEED MIX AT A

RATE OF 1 POUNDS OF LIVE SEED PER 2,200 S.F. SEEDING RATE SHALL BE

DOUBLED FOR DORMANT SEEDING. SEED MIX FOR UPLAND AREAS SHALL BE AS

FOLLOWS FROM NEW ENGLAND WETLAND PLANTS OR AS APPROVED BY RPR:

THE NEW ENGLAND LOGGING ROAD MIX OR APPROVED EQUAL WITH THE

FOLLOWING PLANT MIX:

LITTLE BLUESTEM (SCHIZACHYRIUM SCOPARIUM)

SWITCH GRASS (PANICUM VIRGATUM)

VIRGINIA WILD RYE (ELYMUS VIRGINICUS)

BIG BLUESTEM (ANDROPOGON GERARDII)

SOFT RUSH (JUNCUS EFFUSUS)

PATH RUSH (JUNCUS TENUIS)

UPLAND BENTGRASS (AGROSTIS PERENNANS)

WITH THE FOLLOWING SPECIES REMOVED FROM THE STANDARD MIX:

RED FESCUE (FESTUCA RUBRA)

INDIAN GRASS (SORGHASTRUM NUTANS)

PARTRIDGE PEA (CHAMAECRISTA FASCICULATA)

4. DISTURBED WETLAND AREAS SHALL BE SEEDED WITH AN APPROVED SEED MIX AT

A RATE OF 1 POUND OF LIVE SEED PER 1,250 S.F. SEEDING RATE SHALL BE

DOUBLE FOR DORMANT SEEDING. SEED MIX FOR WETLAND AREAS SHALL BE AS

FOLLOWS FROM NEW ENGLAND WETLAND PLANTS OR AS APPROVED BY RPR:

THE NEW ENGLAND EROSION CONTROL/RESTORATION MIX FOR DETENTION

BASINS AND MOIST SITES OR APPROVED EQUAL WITH FOLLOWING PLANT MIX:

RIVERBANK WILD RYE (ELYMUS RIPARIUS)

LITTLE BLUESTEM (SCHIZACHYRIUM SCOPARIUM)

BIG BLUESTEM (ANDROPOGON GERARDII)

SWITCH GRASS (PANICUM VIRGATUM)

UPLAND BENTGRASS (AGROSTIS PERENNANS)

BEGGAR TICKS (BIDENS FRONDOSA )

SPOTTED JOE PYE WEED (EUPATORIUM MACULATUM)

NODDING BUR MARIGOLD (BIDENS CERNUA)

NEW ENGLAND ASTER (ASTER NOVAE-ANGLIAE)

BONESET (EUPATORIUM PERFOLIATUM)

BLUE VERVAIN (VERBENA HASTATA)

SOFT RUSH (JUNCUS EFFUSUS)

WOOL GRASS (SCIRPUS CYPERINUS)

WITH THE FOLLOWING SPECIES REMOVED FROM THE STANDARD MIX:

CREEPING RED FESCUE (FESTUCA RUBRA)

HOLLOW-STEM JOE PYE WEED (EUPATORIUM FISTULOSUM/EUTROCHIUM FISTULOSUM)

NEW YORK IRONWEED (VERNONIA NOVEBORACENSIS)

5. ALL SLOPES AND HIGHLY EROSIVE AREAS MUST BE HYDROSEEDED AND MULCHED

AS NEEDED WHEN CONSTRUCTION ACTIVITY IS STOPPED FOR GREATER THAN 2

WEEKS.

6. SEED AND MULCH IS TO BE INSPECTED DAILY FOLLOWING EACH RAIN EVENT TO

DETERMINE IF CONCENTRATED FLOWS ARE PRESENT. IN THE EVENT THAT SEED

AND MULCH ARE REMOVED BY EROSIVE RUNOFF, REPAIRS ARE TO BE MADE

IMMEDIATELY.

7. FINAL STABILIZATION SHALL BE CONSIDERED COMPLETE WHEN ALL

SOIL-DISTURBING ACTIVITIES HAVE BEEN COMPLETED AND A UNIFORM,PERENNIAL

VEGETATIVE COVER WITH A DENSITY OF EIGHTY PERCENT HAS BEEN

ESTABLISHED OR EQUIVALENT STABILIZATION MEASURES (SUCH AS THE USE OF

MULCHES OR EROSION CONTROL MATTING) HAVE BEEN EMPLOYED ON ALL

UNPAVED AREAS NOT COVERED BY PERMANENT STRUCTURES. ACHIEVEMENT OF

FINAL STABILIZATION SHALL BE DETERMINED BY THE OWNER.

8. THE CONTRACTOR SHALL BE RESPONSIBLE FOR MAINTENANCE OF ALL

VEGETATED SURFACES, INCLUDING WATERING, FERTILIZING, AND RE-SEEDING

UNTIL ESTABLISHMENT CONDITIONS ARE MET AND UNTIL THE END OF THE

CONTRACTUAL MAINTENANCE PERIOD AS OUTLINED IN THE SPECIFICATIONS.

9. NO FOOT OR VEHICULAR TRAFFIC IS ALLOWED IN NEWLY SEEDED AREAS

EXCEPT FOR THAT NEEDED FOR MAINTENANCE.

1 8/09/2024 ADDENDUM #1 JFN

2 6/28/2024 100% DESIGN DRAWINGS JFN

1 5/31/2024 90% DESIGN DRAWINGS JFN

0 3/15/2024 60% DESIGN DRAWINGS JFN

NO. DATE ISSUE/REVISION APP

---- \\geiconsultants.com\data\Data_Storage\Working\NEW HAMPSHIRE DES\2204640 State Owned Dam Technical Support\00_CAD\Design\Sheets\Lower Trio Dam\C-209-C-210_Restoration_Plan.dwg

GEI Project 2204640

NEW HAMPSHIRE

DEPARTMENT OF

ENVIRONMENTAL

SERVICES

Designed: J. Jacak

Checked: J. Nickerson

GEI CONSULTANTS OF MICHIGAN, P.C.

+5

09 2309

2312 23

TRIO PONDS ROAD ALIGNMENTEDGE OF ROADWAY

LOWER TRIO POND

WSEL 2309.5

07/30/2023

LOAM AND SEED WITH UPLAND SEED MIX

EMBANKMENT ALIGNMENT

SPILLWAY

LOAM AND SEED WITH UPLAND SEED MIX

LIMITS OF DISTURBANCE

RIPRAP (TYP.)

POND

BROOK

FLOW

NOTES:

1. ALL AREAS DURING CONSTRUCTION MUST BE PERMANENTLY STABILIZED WITHIN 5

CALENDAR DAYS OF FINAL GRADING (GRADE LISTED ON PLAN). APPROPRIATE

VEGETATIVE SOIL STABILIZATION IS TO BE USED TO MINIMIZE EROSION.

TEMPORARY AND PERMANENT VEGETATIVE COVER IS TO BE ESTABLISHED IN

ACCORDANCE WITH THE PROJECT PLANS AND SPECIFICATIONS, USING

HYDRO-SEEDING, BROADCASTING, OR OTHER APPROVED TECHNIQUES.

2. ALL DISTURBED AREAS TO RECEIVE 6-INCHES OF LOAM, SPECIFIED SEED MIX, AND

THEN MULCHED WITH STRAW, WOOD CHIPS, OR OTHER APPROVED WEED-FREE

MATERIAL. BIO OR PHOTO-DEGRADABLE EROSION FABRIC IS ALSO ACCEPTABLE

FOR POST-RESTORATION STABILIZATION. ON FLAT SURFACES AND ON SLOPES OF

3:1 OR FLATTER, MULCH OR EROSION CONTROL MATTING SHALL BE USED AFTER

FINAL SEEDING TO PROTECT FROM THE IMPACT OF RAIN AND TO INCREASE THE

CAPACITY OF THE SOIL TO ABSORB WATER. FOR STEEPER SLOPES (I.E. GREATER

THAN 3:1), EROSION CONTROL MATTING SHALL BE USED.

3. DISTURBED UPLAND AREAS SHALL BE SEEDED WITH AN APPROVED SEED MIX AT A

RATE OF 1 POUNDS OF LIVE SEED PER 2,200 S.F. SEEDING RATE SHALL BE

DOUBLED FOR DORMANT SEEDING. SEED MIX FOR UPLAND AREAS SHALL BE AS

FOLLOWS FROM NEW ENGLAND WETLAND PLANTS OR AS APPROVED BY RPR:

THE NEW ENGLAND LOGGING ROAD MIX OR APPROVED EQUAL WITH THE

FOLLOWING PLANT MIX:

LITTLE BLUESTEM (SCHIZACHYRIUM SCOPARIUM)

SWITCH GRASS (PANICUM VIRGATUM)

VIRGINIA WILD RYE (ELYMUS VIRGINICUS)

BIG BLUESTEM (ANDROPOGON GERARDII)

SOFT RUSH (JUNCUS EFFUSUS)

PATH RUSH (JUNCUS TENUIS)

UPLAND BENTGRASS (AGROSTIS PERENNANS)

WITH THE FOLLOWING SPECIES REMOVED FROM THE STANDARD MIX:

RED FESCUE (FESTUCA RUBRA)

INDIAN GRASS (SORGHASTRUM NUTANS)

PARTRIDGE PEA (CHAMAECRISTA FASCICULATA)

4. DISTURBED WETLAND AREAS SHALL BE SEEDED WITH AN APPROVED SEED MIX AT

A RATE OF 1 POUND OF LIVE SEED PER 1,250 S.F. SEEDING RATE SHALL BE

DOUBLE FOR DORMANT SEEDING. SEED MIX FOR WETLAND AREAS SHALL BE AS

FOLLOWS FROM NEW ENGLAND WETLAND PLANTS OR AS APPROVED BY RPR:

THE NEW ENGLAND EROSION CONTROL/RESTORATION MIX FOR DETENTION

BASINS AND MOIST SITES OR APPROVED EQUAL WITH FOLLOWING PLANT MIX:

RIVERBANK WILD RYE (ELYMUS RIPARIUS)

LITTLE BLUESTEM (SCHIZACHYRIUM SCOPARIUM)

BIG BLUESTEM (ANDROPOGON GERARDII)

SWITCH GRASS (PANICUM VIRGATUM)

UPLAND BENTGRASS (AGROSTIS PERENNANS)

BEGGAR TICKS (BIDENS FRONDOSA )

SPOTTED JOE PYE WEED (EUPATORIUM MACULATUM)

NODDING BUR MARIGOLD (BIDENS CERNUA)

NEW ENGLAND ASTER (ASTER NOVAE-ANGLIAE)

BONESET (EUPATORIUM PERFOLIATUM)

BLUE VERVAIN (VERBENA HASTATA)

SOFT RUSH (JUNCUS EFFUSUS)

WOOL GRASS (SCIRPUS CYPERINUS)

WITH THE FOLLOWING SPECIES REMOVED FROM THE STANDARD MIX:

CREEPING RED FESCUE (FESTUCA RUBRA)

HOLLOW-STEM JOE PYE WEED (EUPATORIUM FISTULOSUM/EUTROCHIUM FISTULOSUM)

NEW YORK IRONWEED (VERNONIA NOVEBORACENSIS)

5. ALL SLOPES AND HIGHLY EROSIVE AREAS MUST BE HYDROSEEDED AND MULCHED

AS NEEDED WHEN CONSTRUCTION ACTIVITY IS STOPPED FOR GREATER THAN 2

WEEKS.

6. SEED AND MULCH IS TO BE INSPECTED DAILY FOLLOWING EACH RAIN EVENT TO

DETERMINE IF CONCENTRATED FLOWS ARE PRESENT. IN THE EVENT THAT SEED

AND MULCH ARE REMOVED BY EROSIVE RUNOFF, REPAIRS ARE TO BE MADE

IMMEDIATELY.

7. FINAL STABILIZATION SHALL BE CONSIDERED COMPLETE WHEN ALL

SOIL-DISTURBING ACTIVITIES HAVE BEEN COMPLETED AND A UNIFORM,PERENNIAL

VEGETATIVE COVER WITH A DENSITY OF EIGHTY PERCENT HAS BEEN

ESTABLISHED OR EQUIVALENT STABILIZATION MEASURES (SUCH AS THE USE OF

MULCHES OR EROSION CONTROL MATTING) HAVE BEEN EMPLOYED ON ALL

UNPAVED AREAS NOT COVERED BY PERMANENT STRUCTURES. ACHIEVEMENT OF

FINAL STABILIZATION SHALL BE DETERMINED BY THE OWNER.

8. THE CONTRACTOR SHALL BE RESPONSIBLE FOR MAINTENANCE OF ALL

VEGETATED SURFACES, INCLUDING WATERING, FERTILIZING, AND RE-SEEDING

UNTIL ESTABLISHMENT CONDITIONS ARE MET AND UNTIL THE END OF THE

CONTRACTUAL MAINTENANCE PERIOD AS OUTLINED IN THE SPECIFICATIONS.

9. NO FOOT OR VEHICULAR TRAFFIC IS ALLOWED IN NEWLY SEEDED AREAS

EXCEPT FOR THAT NEEDED FOR MAINTENANCE.

0+00 1+00 1+25

Attention:

0 1"

If this scale bar does not measure 1" then drawing is not original scale.

1 8/09/2024 ADDENDUM #1 JFN

2 6/28/2024 100% DESIGN DRAWINGS JFN

1 5/31/2024 90% DESIGN DRAWINGS JFN

0 3/15/2024 60% DESIGN DRAWINGS JFN

NO. DATE ISSUE/REVISION APP

RESTORATION PLAN

0 10 20

SCALE, FEET

Consultants

GEI CONSULTANTS, INC.

400 UNICORN PARK DRIVE

WOBURN, MA 01801

(781)721-4000

NEW HAMPSHIRE

DEPARTMENT OF

ENVIRONMENTAL

SERVICES

GEI Project 2204640 ---- \\geiconsultants.com\data\Data_Storage\Working\NEW HAMPSHIRE DES\2204640 State…