[HISTORY: Adopted by the Town Board of the Town of Plattekill 6-7-1989 by resolution. Amendments noted where applicable.]
GENERAL REFERENCES
Streets and sidewalks — See Ch. 90.
Subdivision of land — See Ch. 93.
The developer shall establish and clearly mark on the site the limits of the road right-of-way and easements, the center line and grades of the road pavement and the location and elevation of drainage and drainage structures in accordance with the approved plans.
A. 
Prior to any clearing and grubbing, the developer shall install appropriate erosion control measures, which shall include but not be limited to hay bale silt barriers, silt fences, sedimentation traps and temporary ditching or piping and the like, in order to prevent excessive on-site erosion, damage to properties off site, deposition of silt or debris into established drainage courses, streams or waterways or any other harmful effects on the environment. The developer shall maintain these erosion control measures throughout the construction period. The Planning Board and/or the Town Superintendent of Highways may require from the developer detailed erosion and sedimentation control plans and specifications as part of the construction plans approval phase of the project.
B. 
The developer shall clear the entire area within the limits of:
(1) 
The road right-of-way, exclusive of trees designated by the town to remain.
(2) 
Stream channels and ditches.
(3) 
Easement areas.
C. 
All roots and stumps shall be grubbed, excavated and removed from the above areas. No stumps are to be buried within the right-of-way. If stumps are to be buried on adjacent properties, their location shall be shown on a map prepared by the developer.
A. 
The developer shall complete the shaping of the right-of-way, streams and ditches and easement areas to the line and grade as shown on the approved plan and as otherwise may be directed by the Town Superintendent of Highways. All unsuitable or unstable materials shall be completely excavated and removed from the right-of-way, and all rocks or boulders larger than six inches in diameter shall be excavated at least eight inches below the finished subgrade of the road pavement, drainage or drainage structures, curbs and sidewalks.
B. 
Where fills are necessary to complete the required line and grade or to backfill trenches or other excavations, the materials incorporated in the work shall be acceptable to the Town Superintendent of Highways and shall be placed in layers not exceeding eight inches in depth, each layer to be thoroughly compacted by rolling with a three-wheel, sheepsfoot, pneumatic-tired or padded-wheel roller or by an impact rammer or vibrator equipment in areas inaccessible to power rollers to achieve at least 95% of the maximum density, Modified Proctor. All compaction shall continue until the fills are firm and unyielding.
C. 
The areas between the shoulder edge and the right-of-way line must be graded and seeded in order to prevent erosion. All slopes, except rock cuts, shall be covered with four inches of topsoil and shall be seeded, mulched or otherwise planted to provide a hardy cover and to prevent erosion.
D. 
The minimum treatment for areas not covered by pavement is to be fertilized (5-10-5 fertilizer) at the rate of 20 pounds per 1,000 square feet with lime at the rate of 50 pounds per 1,000 square feet, seed (perennial rye and crown vetch) at the rate of two pounds per 1,000 square feet and mulch (hay or straw) at the rate of 100 pounds per 1,000 square feet.
A. 
Buried utilities shall be designed and placed in accordance with the standards of the local public utility and/or the Town of Plattekill.
B. 
The width of the trench in which the pipe is placed shall be sufficient to permit thorough tamping of the backfill under the haunches and around the pipe. Bedding and backfilling are to be sufficient to protect the pipe and to prevent settlement.
C. 
Any additional drainage facilities not shown on the approved plan and which may be ordered by the Town Superintendent of Highways shall be constructed by the developer at the developer's expense and in accordance with these specifications.
A. 
Storm drain and culvert pipe may be of either corrugated metal or reinforced concrete with a minimum diameter of 12 inches across driveways and 15 inches for road drainage.
(1) 
Round corrugated metal pipe and oblate corrugated metal pipe shall conform to New York State Department of Transportation specifications, with the following exceptions:
(a) 
All corrugated metal pipe shall be galvanized and coated, and the invert of the pipe shall be paved with bituminous material to a depth of not less than 1/8 inch, measured over the crest of the corrugations on the inside circumference. New York State Department of Transportation approved polymer and Type II aluminized steel coatings are also acceptable. The minimum steel gauge is 16.
(b) 
All collars or connecting bands shall be 12 inches wide and shall be furnished with bolts six inches long.
(2) 
Reinforced concrete pipe shall be Class V and conform to New York State Department of Transportation specifications.
(3) 
All reinforced concrete pipe shall be manufactured with slip joints or bell-and-spigot joints.
(4) 
Each piece of reinforced concrete pipe shall be marked with the specification number and the date of manufacture.
B. 
Pipes of other material shall be approved by the Town Superintendent of Highways.
The following specifications and figures show the minimum acceptable construction for typical catch basins and curb inlets. Whenever, in the opinion of the Town Superintendent, ground conditions or other circumstances require it, larger or heavier materials, additional materials, reinforcing or other modifications and improvements in design and construction shall be made as directed by the Town Superintendent at any time prior to paving.
A. 
Catch basins shall be constructed at all points of change of slope or alignment and at all junction points.
B. 
The excavation for the catch basin is to be at a depth of 35 inches below the designated elevation of the invert of the effluent pipe. Crushed stone or run-of-bank gravel to a uniform depth of nine inches leveled and compacted over the entire area under the base shall be placed.
C. 
All catch basins shall be of precast concrete conforming to New York State Department of Transportation specifications and shall be designed to sustain an H-20 highway loading plus 25% impact load.
D. 
Catch basins having a depth greater than 48 inches from the finished surface to the top of the concrete base shall be provided with steps. Steps shall be of wrought iron having a minimum diameter of 3/4 inch which shall be hot-bent to shape and hot-dipped galvanized or plastic coated after bending. They shall be solidly set at the time of construction and shall extend at least four inches into the wall. The steps shall extend 4 1/2 inches inside the wall of the catch basin. The top step shall be not more than 18 inches below the finished surface and thence to the base steps shall be no more than 12 inches apart.
A. 
After completion of the rough grade and prior to the laying of the foundation course, the subgrade shall be shaped to line and grade and thoroughly compacted with an approved self-propelled roller weighing not less than 10 tons. All hollows and depressions which develop under rolling shall be filled with acceptable granular material and again rolled, this process to be continued until no depressions develop. The subgrade shall not be muddy or otherwise unsatisfactory when the foundation course is laid upon it.
B. 
Geotextile drainage fabric (highway grade) shall be placed over prepared subgrades where the subbase is wet or undrainable or when the subbase material contains more than 20% silt/clay soils. Drainage fabric shall be installed prior to the placement of the foundation base course and after all utilities have been installed to the satisfaction of the Town Superintendent of Highways.
A. 
Before fine grading or construction of curbs and sidewalks is started, all storm and sanitary sewers and all utilities, including house connections and hydrants, shall have been installed and all fill and backfill shall have been thoroughly compacted to the satisfaction of the Town Superintendent of Highways.
B. 
Fine grade shall conform to the prescribed width of pavement and shall extend equidistant from the center line of the road right-of-way and shall conform to the typical cross sections of the road pavement and to the approved line and grade.
After the fine grade and all curbs have been constructed to the satisfaction of the Town Superintendent of Highways, the developer shall furnish and place a foundation course of approved run-of-bank gravel, crusher-run stone or crusher-run gravel to the depths as called for in these specifications. All materials acceptable for these courses shall be hard, durable and sound and shall be well graded from coarse to fine. The maximum diameter of the large particles not exceeding 2/3 of the thickness of the compacted foundation course and 90% to 100% by weight of the particles shall be of such size as will pass through a two-inch square hole, not more than 70% by weight pass the No. 40 mesh seive and not more than 10% by weight pass the No. 200 mesh seive.
The foundation course is to consist of the same type of granular material as the base course, except that only crusher-run or a well-graded material such as the previously designated New York State Department of Transportation Item No. 4 is acceptable. The material must be capable of being graded to within 1/4 inch of the final foundation course grade. Samples of the material considered for use must be submitted in advance of use to the Town Superintendent of Highways and Town Engineer.
A. 
Materials.
(1) 
The bituminous material shall meet the requirements of 702-31 (New York State Department of Transportation specifications), Asphalt Emulsion or Cationic Asphalt Emulsion. The type of bituminous materials shall be as specified on the plans or in the proposal unless otherwise directed by the Town Engineer.
(2) 
The aggregate shall meet the requirements of 703-02 (New York State Department of Transportation), Coarse Aggregates, for the sizes specified.
(3) 
Hydrated lime shall meet the requirements of 712-04 (New York State Department of Transportation specifications), Hydrated Lime.
(4) 
The bituminous road mix shall generally be composed of a mixture of aggregate, hydrated lime, if required, and bituminous material. The mix shall be proportioned as specified in table below.
Composition of Bituminous Road Mixtures
Aggregate Sizes
Mix 1 General Limits
(percent)1
Mix 2 General Limits
(percent)1
No. 2
75 to 85
--
No. 1
15 to 25
75 to 85
No. 1A
--
15 to 25
Bituminous material2
4.0 to 6.03
4.7 to 6.73
NOTES:
1 Percentage based on total aggregate weight.
2 Percentage based on total mix weight.
3 When asphalt emulsion material designation 702-31 is used, 0.2% to 0.3% of hydrated lime may be added to the mix to hasten the break of the emulsion.
B. 
Construction requirements.
(1) 
General standards.
(a) 
Bituminous material or mixture shall not be applied on any soft surfaces, when the weather is wet, when the air temperature is below 50° F. in the shade or when the weather conditions would prevent proper construction of the pavement.
(b) 
The travel plant mixer and other equipment shall be capable of continuously mixing aggregates with bituminous material in the specified proportions in a mixer unit and then depositing the mixture on the prepared base.
(c) 
All equipment and the condition of the equipment shall meet the approval of the Town Engineer.
(2) 
Preparation of the base. The roadway surface to be covered shall be free from holes, depressions, bumps, waves and corrugations. Any unsuitable surface areas shall be repaired by replacement of the unstable materials or by patching with a material to produce a tight surface having the same elevation as the surrounding surface. The roadway shall be broomed when ordered by the Town Engineer to remove loose material.
(3) 
Mixing and spreading. The aggregate and asphalt shall be thoroughly mixed so that the bituminous material is uniformly distributed throughout and all aggregate particles are completely coated. If hydrated lime is used to hasten the break of emulsion, the lime may be added to the mix just prior to the discharge of the material from the mixer. The mixture shall be deposited on the prepared base at the back of a mechanical spreader in a uniform layer so as to produce the specified thickness after compaction.
(4) 
Compaction. After spreading, the mixture shall be thoroughly and uniformly compacted with a self-propelled steel-wheeled roller to obtain a thoroughly compacted pavement. The number of roller passes to achieve the desired compaction shall be approved by the Town Engineer.
(5) 
Surface testing. The finished surface of the pavement shall be tested with a sixteen-foot straight edge laid parallel with the center line of the pavement. Any area exceeding a one-fourth-inch variation from the surrounding area shall be satisfactorily corrected or removed and replaced.
(6) 
Pavement sealing, final coat. Immediately after compacting the road mix, No. 1A size stone meeting the requirements of 703-02 (New York State Department of Transportation specification), Coarse Aggregates, at the rate of 15 to 20 pounds per square yard shall be uniformly spread upon the surface and the course rolled thoroughly. The pavement shall not be opened to traffic for a minimum of three days after placing the No. 1A size stone and before placing the seal coat. The seal coat shall be bituminous material asphalt emulsion meeting the requirements of 702-31 (New York State Department of Transportation specification) applied at the rate of 0.55 to 0.65 gallon per square yard. This shall be immediately followed by an application of No. 1A aggregate at the rate of 15 to 20 pounds per square yard, which shall then be rolled.
(7) 
Pavement sealing, second coating. One year after the first seal coat is placed, there shall be placed a second seal coat applied to the full width of the road. The second coat shall be similar to the first coat in every way, except that limited traffic is to be allowed three hours after the completion of the seal coat for a period of 24 hours, at which time all traffic is to continue.
A. 
Ditches. There can be three types:
(1) 
Type 1: stabilized soil and minimum treatment as per § A117-3, with shaping of ditch and application of fertilizer, lime, seed and mulch, to be used for slopes less than 2%.
(2) 
Type 2: stabilized soil with a foundation course of four inches, similar to § A117-9, and either surface treatment or rip rap.
(a) 
The surface treatment is to be as follows:
[1] 
Asphaltic priming oil shall be applied at the rate of 0.5 gallon per square yard or as directed by the Town Superintendent of Highways.
[2] 
The oiled surface shall be uniformly covered with sufficient five-eighths-inch or one-fourth-inch crushed stone to completely cover over the prime coat.
[3] 
The prime coat must be allowed to penetrate and set for about three days, or longer if so directed by the Township Superintendent of Highways.
[4] 
Prime surface cover material shall then be hand-broomed or lightly drag-broomed to ensure that any excess cover material is evenly distributed. If ordered by the Town Superintendent of Highways, excessive loose stone shall be removed.
[5] 
Rapid curing cutback asphalt material of a grade to be determined or approved by the Town Superintendent of Highways shall then be applied at the rate of 1/3 to 1/2 gallon per square yard.
[6] 
This surface shall be uniformly covered with five-eighths-inch to one-fourth-inch crushed stone and rolled with a five- to ten-ton power roller.
[7] 
Hand-broom or lightly drag-broom the surface to distribute cover material evenly and reroll with a five- to ten-ton power roller to compact and imbed cover material.
[8] 
Any damage that may be done to the finished surface by the movement of the contractor's equipment shall be repaired to the satisfaction of the Town Superintendent of Highways by the petitioner before final acceptance of the road, unless the petitioner is released from this obligation, in writing, by the Town Superintendent of Highways.
(b) 
Rip rap is to consist of large gravel or stone, sizes from one inch 10% to 30% to two inches 70% to 90%. The rip rap is to be placed in an even layer six inches in depth. A Type 2 ditch is to be used for slopes over 2% and less than 6%.
(3) 
Type 3. This is to be a motor-paved surface (two inches thick) placed on a four-inch foundation course as in the Type 2 ditch or a hot-mix asphalt surface (two inches) placed on a four-inch foundation course. The foundation course is to be as in the Type 2 ditch. The Type 3 ditch is to be used in all ditches of 6% or greater slope.
B. 
Shoulders.
(1) 
Type 1: the same as for a Type 1 ditch, for slopes less than 2%.
(2) 
Type 2: stabilized soil subbase as for road pavement and a four-inch foundation course as in § A117-9, to be used on all slopes greater than 2%.
Guardrails are to be set on fill sections or other steep slope sections where the slopes either within or adjacent to the right-of-way exceed a slope of one vertical to four horizontal. Guard posts, beams and anchor sections are to be approved by the Highway Superintendent and the Town Engineer.
Permanent monuments are to be approved by the Superintendent of Highways and the Town Engineer and are to adhere to the following minimum requirements:
A. 
Monuments are to be set at the beginning and end of all straight courses.
B. 
Monuments are to be set at all points of curvature (PC), points of tangency (PT) and points of compound curvature (PCC) for all curved sections.
C. 
Monuments are to be set for culs-de-sac at a minimum one point so as to reestablish the center point of the cul-de-sac.
D. 
The number of monuments are to be such that at least two monuments are on a line of sight from any monument.
E. 
Only one side of a road need be monumented.
F. 
Monuments are to be set at the intersection points of the edges of all drainage easements and road limits.
G. 
Monuments are intended to be permanent and are to be of a type and material and set at a depth approved by the Highway Superintendent and the Town Engineer. The developer's surveyor, licensed in the State of New York, is to certify the location of all monuments with coordinates relating to the subdivision boundaries.[1]
[1]
Editor's Note: The drawing of a typical road section which immediately followed this section is on file in the Town Clerk's office and may be inspected during regular business hours.