SECTION 4.00
SOIL EROSION, SEDIMENTATION CONTROL, AND LANDSCAPING
Temporary and permanent erosion control measures shall be provided for all land disturbing work in accordance with an erosion control plan approved by the Town. A grading permit shall be obtained from the Town prior to beginning site work. Temporary measures shall be installed and inspected by the Town for compliance prior to any land disturbing activity. All permanent erosion control measures shall be incorporated into the work at the earliest practical time. All temporary measures shall be maintained until the permanent measures have taken effect or approved by the Erosion Control Officer. Temporary and permanent measures shall be coordinated to provide effective and continuous erosion control throughout the construction and post-construction period to minimize siltation of streams, lakes, reservoirs, and other impoundments, ground surfaces, and other property. These measures shall remain in effect until Final Approval is given by the Town.
Silt Fence shall be installed in accordance with the details at the toe of all fill slopes and any other necessary locations as directed by the Town.
Diversion Ditches shall be installed in accordance with the details at the top of cut and fill slopes and any other necessary locations as directed by the Town.
Construction Entrances shall be installed at all points of access to construction sites in accordance with the details. Any access point which does not have a construction entrance shall be barricaded to prevent its use.
Sediment Pits or Filter Basins shall be installed in accordance with the details at all points where accumulated runoff is released to natural drainage channels, and any other necessary locations as directed by the Town. Sediment pits and filter basins shall be sized to hold 1800 cubic feet of sediment for every acre of denuded area tributary to the structure.
Temporary Seeding is the use of rapid growing annual grasses, small grains or legumes to provide initial, temporary cover for erosion control on disturbed areas for less than 12 months. Seed bed preparations and soil amendments shall be in accordance with the method described under "Seeding and Mulching".
Seeding and Mulching shall be done immediately following construction. All disturbed areas shall be dressed to a depth of 8 inches. The top 3 inches shall be pulverized to provide a uniform seedbed. Agricultural lime shall be applied at the rate of 95 lb./1000 sq. ft. immediately before plowing. Grass seed shall be applied at the rates outlined in Tables 4.1 and 4.2. In areas where maintenance will eventually be assumed by the Town under heavy vehicular traffic situations (i.e. right of ways, medians) consultation shall be made with the Building and Grounds Superintendent and the Erosion Control Officer as to the requirements and use of alternate grass.
On projects that will be maintained by the Town, verification of soil amendments and seeding rates may be required, and changes to these rates may be requested by the Town during the plan review process. Reuse of topsoil and/or other measures to assure final soil conditions are conducive to rapid establishment of vegetation cover is required.
5-10-10 fertilizer shall be applied to all disturbed areas at a rate of 21 lb./1000 sq. ft., and mulching shall consist of small grain straw applied at a rate of 70 lb./1000 sq. ft. Mulched areas shall be tacked with asphalt at a rate of 200 to 400 gallons per acre, or other approved method sufficient to hold the straw in place.
If active construction ceases, meaning no substantial or significant progress is made in any area for more than 30 days, all disturbed areas must be seeded, mulched, and tacked unless written approval is granted by the Erosion Control Officer. Incidental grading shall not constitute substantial or significant progress in construction activity.
Permanent Ground Cover is the establishment of perennial vegetation cover for periods longer than 12 months. All disturbed areas shall receive a permanent ground cover. Permanent seeding and temporary seeding differ only in the type of seed to be used (i.e. annual versus perennial). Seed bed preparations and soil amendments shall be in accordance with Section 4.02 "Seeding and Mulching". As a part of permanent seeding, maintenance may be required to maintain vegetation for 12 months. This maintenance shall be considered a part of establishing permanent ground cover. In areas where maintenance will eventually be assumed by the Town under heavy vehicular traffic situations (i.e. right of ways, medians) consultation shall be made with the Building and Grounds Superintendent and the Erosion Control Officer as to the requirements of acceptable soil conditions and use of alternate grass or ornamental landscaping.
Riprap Dissipation Pads and Riprap Protection
All stormwater release points shall be protected by riprap dissipation pads designed to reduce discharge velocities to nonerosive levels. Dissipation pads shall be designed and constructed with either an engineering fabric or washed stone barrier between the pad and the natural ground. Calculations shall be furnished to indicate the sufficiency of the dissipation pads specified. Riprap pad design shall be in accordance with NYDOT or NRCS methods. Filter fabric, or a washed stone liner, shall be used on all sediment basins, riprap dissipaters, and channels.
All computations and assumptions used to formulate an erosion control plan shall be reviewed by the Town. Erosion and sedimentation control measures, structures, and devices shall be planned, designed, and constructed to control the calculated peak runoff from a 10-year frequency storm. Runoff rates shall be calculated using the USDA Soil Conservation Service Method, the Rational Method, or other acceptable calculation procedures. Runoff computations shall be based on rainfall data published by the National Weather Service for this area.
The construction sequence on projects shall be as follows:
1. Obtain grading permit;
2. Install all erosion control measures as shown;
3. Obtain certificate of compliance through on-site inspection by Erosion Control Officer;
4. Proceed with grading;
5. Clean sediment basins when one-half full;
6. Seed and mulch denuded area within 30 days after finished grades are established;
7. Maintain soil erosion control measures until permanent ground cover is established;
8. Request final approval by Erosion Control Officer;
9. Remove soil erosion control measures and stabilize these areas.
SHOULDERS, SIDE
DITCHES, SLOPES
(Maximum 3:1)
| Date | Type+ |
Planting Rate |
| Aug 15 - Nov 1 | Tall Fescue or Hard Fescue | 300 lb./acre |
| Nov 1 - Mar 1 | Tall Fescue and Abruzzi Rye or Annual Rye | 300 lb./acre |
| Mar 1 - Apr 15 | Tall Fescue or Hard Fescue | 300 lb./acre |
| Apr 15 - June 30 | Hulled Common Bermuda grass, Weeping Love Grass | 25 lb./acre |
| July 15 - Aug 15 | Tall Fescue and ***Browntop Millet ***or Sorghum-Sudan Hybrids | 35 lb./acre |
Consult Erosion Control Officer or NRCS for additional alternatives for vegetating denuded areas. The above vegetation rates are those which do well under local conditions; other seeding rate combinations are possible.
***Temporary - Reseed according to optimum season for desired permanent vegetation. Do not allow temporary cover to grow over 12 inches in height before mowing to keep fescue from being shaded out.
+Bahia grass shall not be used in Town maintained areas.
SHOULDERS, SIDE DITCHES, SLOPES
Slopes (3:1 and 2:1) (not mowed)
Date Type+ Planting Rate Mar 1 - June 1 Sericea Lespedeza (scarified) 50 lb./acre and Mar 1 - Apr 15 Add Tall Fescue 120 lb./acre or Mar 1 - June 30 Add Weeping Lovegrass 10 lb./acre or Mar 1 - June 30 Add Hulled Common Bermuda grass 25 lb./acre June 1 - Sept 1 ***Tall Fescue and 120 lb./acre ***Browntop Millet 35 lb./acre ***or Sorghum-Sudan Hybrids 30 lb./acre Sept 1 - Mar 1 Sericea Lespedeza (unhulled/unscarified) 70 lb./acre and Tall Fescue 120 lb./acre Add Abruzzi Rye or Annual Rye 25 lb./acre
Consult Erosion Control officer or NRCS for additional alternatives for vegetating denuded areas. The above vegetation rates are those which do well under local conditions; other seeding rate combinations are possible.
***Temporary - Reseed according to optimum season for desired permanent vegetation. Do not allow temporary cover to grow over 12 inches in height before mowing to keep fescue from being shaded out.
+Bahia grass shall not be used in Town maintained areas.