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Wetlands Restoration/Storm Water Management Model Project, and Environmental Learning Center
November 5, 2004 draft - text of page 2, General Notes
list of 22 individual pages - Adobe Acrobat 22 page 7MB file for printing (set printer to fit-to-page) - with a 56K dial-up modem, file takes about 22 minutes to download
For ease of reading, the text below was converted from the all-upper-case text of the original.

Site prep & erosion control:
1. Excavation within the Alewife reservation shall be conducted in the winter months starting in October in accordance with the order of conditions issued by the Conservation Commission.

2. Prior to the start of construction, all limits of work for the stormwater wetland area shall be staked out by the contractor for review by the engineer. All sediment and erosion control devices including but not limited to: silt fence, straw bales, and turbidity curtains shall be provided. This work shall be reviewed by the engineer and the conservation commission prior to starting construction.

3. Prior to excavation of the low-flow outlet channel from the detention basin, a sand bag dike shall be placed within the silt curtain to prevent flow from the Little River from entering the work area. This work shall be reviewed by the engineer before excavation of the outlet channel may begin.

4. Existing survey conditions are from a topographic survey prepared by HarryR. Feldman Inc, dated October 21, 2003.

5. Wetland flag numbers 1 through 14 were placed by TBG in October 2003 and mapped using GPS data.

6. Refer to Massachusetts Department of Environmental Protection (DEP) erosion and sediment control guidelines (1997 or most recent).

7. Contractor shall arrange a site visit with the Cambridge Conservation Commission after the installation of erosion control is complete and prior to commencement of work. No work shall be completed until the Conservation Commission or its agent approves the erosion control installation.

8. Unless noted, all areas within limit of work line to be cleared and grubbed.

9. Strip and remove top six (6) inches of topsoil from all areas within limit of work line.

10. Strip and stockpile next twelve (12) inches of subsoil from areas shown on plan.

11. Stockpile locations to be approved by engineer, stockpile heights and volumes shall be as outlined in spec 01568, sedimentation and erosion control.

12. No work shall be performed beyond the limit of work line without prior authorization from the engineer.

13. Any area outside the limit of work that is disturbed shall be restored to its original condition at no cost to the owner.

14. All points of construction egress or ingress shall be maintained to prevent tracking or flowing of sediment onto public roads or abutting property.

15. Use all available means to minimize the amount of soil erosion caused by the work of the project. This includes responsibility for maintenance of all soil erosion control devices indicated. Repairs to soil erosion control devices shall be completed within 2 days from notification.

16. Provide and maintain erosion control devices where shown on plans. The devices are to remain in place until pavement and stormwater structures are constructed and until a permanent ground cover is established.

17. Erosion control devices shall be checked daily and after each rainfall to ensure working order.

I8. Install a silt fence around all stockpiled soil.

19. Seed all disturbed areas (including stockpiles) exposed for more than 14 days with cover crop seed mix.


Layout and Materials:
1. All lines and dimensions are parallel or perpendicular to the lines from which they are measured unless otherwise indicated.

2. All line and grade work per drawings and specifications shall be laid out by a registered civil engineer or surveyor engaged by the contractor.

3. Storage areas for contractor's equipment and materials shall be within the limits of work and as approved by the engineer.

4. Contractor shall verify all existing conditions in the field and report any discrepancies in the site survey to the engineer prior to starting work.

5. All layouts for walks and paths shall be adequately staked by the contractor and approved by the engineer prior to construction.


Grading & Drainage:
1. Prior to commencing any excavation work, the contractor shall notify all utility companies in accordance with the "dig safe" notification procedures promoted by respective utility companies. The 'dig safe' telephone number for Massachusetts is 1-888-344-7233.

2. Contractor shall verify all existing grades in the field and shall report any discrepancies between existing and proposed condition to the engineer. All grades are based on the national geodetic vertical datum (NGVD).

3. Pitch evenly between spot grades. All paved areas must pitch to drain at a minimum slope of one-eighth inch (1/8") per foot. Any discrepancies not allowing this to occur shall be reported to the engineer prior to continuing work.

4. Where new paving or earthwork meets existing paving or earthwork, smoothly blend line and grade of existing with new. Provide vertical curves or roundings at top and bottom of all slopes.

5. Excavation required within proximity of utility lines shall be done by hand. Contractor shall repair any damage to existing utility lines or structures incurred during construction operations at no cost to the utility companies or the owner.

6. All points of construction egress or ingress shall be maintained to prevent tracking or flowing of sediment onto public roads, adjacent wetlands, and abutting property.

7. Maximum crosspitch of all paths is 1.6%. Any discrepancies not allowing this to occur shall be reported to the engineer.

8. All grading shall comply with the rules and regulations of the Massachusetts architectural access board (AAB) and the Americans with Disabilities act accessibility guidelines for buildings and facilities (ADAAG), latest edition. In case of conflict between regulations, the guideline providing greater access shall apply.

9. Comply with all order of conditions issued by the Cambridge Conservation Commission on July 2004.

10. Roll edges of planting soil for tall turf lawn and meadows where adjacent to walks and drives.


Planting:
1. If discrepancies exist between the number of plants drawn on the planting plan and the number of plants in the plant schedule, the planting plan shall govern.

2. All new plant material shall conform to the minimum guidelines established for nursery stock published by the American Association of Nurserymen, Inc. In addition, all new plant material for the project shall be of specimen quality.

3. All plant material shall be nursery crown. No field-collected specimens will be allowed.

4. All new plants shall be balled and burlapped or container-grown, unless otherwise noted on the plant schedule.

5. The contractor shall supply all new plant material in quantities sufficient to complete the planting shown on the drawings.

6. Any proposed substitutions of plant species shall be made with plants of equivalent overall form, height, branching habit, flower, leaf, color, fruit and culture, and only after written approval of the engineer.

7. All new plants shall be tagged and approved by the engineer at the nursery prior to digging or delivery to the site.

8. Contractor shall locate and verify all existing utility lines prior to planting and shall report any conflicts to the engineer. No trees shall be planted closer than ten feet (10') to any underground water and drainage lines or structures.

9. Stake location of all proposed planting for approval by the engineer prior to the commencement of planting.

10. No trees or shrubs shall be planted before acceptance of rough grading by engineer.

11. New shrubs and groundcover shall bear the same relationship to grade as it bore to previous grade. Trees shall bear same relationship to grade as they bore to previous grade in nursery or higher to prevent covering root flare.

12. Prepare all shrub planting beds to a minimum depth of twenty four inches (24") with planting soil.

13. All plant beds to receive two inches (2") to three inches (3") of bark mulch as per drawings.

14. All existing trees to remain shall be properly protected during construction. Protection techniques shall be reviewed and approved by the engineer.

15. Seed and/or hydromulch all disturbed areas with approved seed mix.

16. All areas to be seeded shall receive a minimum of twelve inches (12") of planting soil, measured after compaction, prior to seeding.

17. Contractor shall be responsible for replacing all damaged, stolen, dead. declining or lost material until completion of maintenance and guarantee period.