A. 
Construction Plans. Along with the preliminary application and prior to any construction, one complete set of construction plans including profiles, cross sections, and other working drawings of required construction improvements shall be submitted to the Director of Public Works.
B. 
Reference Standard for Specifications. Reference is herein made to include as a minimum standard, the construction methods and procedures described in the "Standards Specification for Road and Bridge Construction" Revision of 1971, as corrected June 1, 1974, and amendments thereto, published by the RI DOT, Division of Public Works which is incorporated into these Regulations by reference. In addition, safety provisions shall be subject to OSHA regulations and additional written comments of the Chief of the Police.
C. 
Clearing and Grubbing. The applicant shall clear and grub the entire area within the paved road and drainage area limits, as shown on the approved plan, of trees, stumps, root systems, bushes and other objectionable material. Living trees outside of the pavement areas shall be cut only as directed by the Director of Public Works. The branches of any trees left standing shall be carefully trimmed to give a clear height of at least fourteen feet over the pavement area.
D. 
Earth Excavation. Earth excavation includes, but is not limited to: the removal of clay, sand, gravel, mud, loam, soft or disintegrated rock which can be removed without blasting; boulders of less than one cubic yard in volume (one half cubic yard in all trenches) and other unacceptable materials within the limits of the roadway, drainage or other excavation. This item of work also includes the backfilling of all stump holes and other surface irregularities with suitable gravel borrow material. Excavations shall be to a depth and cross-section as shown on the approved plans, profiles and cross-section drawings.
E. 
Rock and Ledge Excavation. Rock and ledge excavation includes removal and disposal of all boulders one cubic yard or more in volume (one half cubic yard in all trenches), and all hard ledge rock which can be removed only by drilling and splitting by hand, by mechanical means or by blasting. Such excavation shall be to a depth at least twelve inches below subgrade and, where applicable, ledge side slopes shall be four feet vertical to one foot horizontal from the edge of pavement to the right-of-way edge.
F. 
Subsurface Water. Where free water is encountered within three feet of existing grade during the wet season, the subbase box elevation shall be constructed no less than four (4) feet above the height of seasonal water table.
A. 
Materials.
1. 
Base Course. Gravel borrow may be bank run or filler may be added by approved methods and shall consist of sound, durable particles, free from loam, silt, clay, and vegetable matter, containing no cobbles over six inches in its largest dimension and meeting all other gradation requirements for gravel borrow of the Town's standards. See Table 12.1.
TABLE 12.1
BASE COURSE GRAVEL GRADATION STANDARD
Sample_______________ Provided By ________________ Date ___________
Drying Time _______________________ Test Date ______________________
Signature ____________________________________________________
Screen
Wqt. Passing
% Passing
Acceptable % Passing
1/2
_____
_____
50-65%
3/8
_____
_____
45-60%
# 4
_____
_____
40-55%
# 40
_____
_____
0-10%
# 200
_____
_____
0-5%
2. 
Base Courses Surface. Crushed bank run gravel meeting gradation requirements for crushed gravel in the referenced standard. Note section M.01.09, Table 1, of the reference standard. Gravel produced by screening without crushing shall not be acceptable.
3. 
Binder Course. Bituminous modified binder (hot mix) conforming to specifications of Section M.03.01 of the reference standard sufficient to yield a uniform depth of not less than three inches.
4. 
Surface Course. Bituminous concrete (hot mix), medium texture Type 1-1, sufficient to yield a uniform depth of not less than two inches. Mix design minimum shall be seven percent of asphalt cement by weight.
5. 
Materials. All materials must be made of a quality acceptable to the Director of Public Works.
B. 
General Conditions. During construction maintain the subdivision roads in passable condition and take measures to eliminate the creation of erosion, sediment, drainage or dust nuisances during construction. A crushed stone construction pad entrance shall be required to prevent mud transfer to existing roads.
C. 
Construction Method.
1. 
Street Base and Pavement Standards. Streets shall be constructed to meet or exceed the minimum standards of Tables 11.1 and 11.2 and 12.1 and Figures 11.1 through 11.3b of these Regulations. Road construction stakes shall be placed at linear intervals no greater than fifty (50) feet and offset at least one foot beyond, but no greater than four (4) feet from the proposed finished road surface edge.
2. 
Preparation of Sub-base. Install underground sewer and water lines, utilities, laterals, service lines, electric, communication lines, and related facilities prior to any street construction. Thoroughly compact sub-base with a fifteen ton vibratory drum roller, or its equivalent, true to the lines, grades, and cross-section shown on the approved construction drawings, at least thirty days after filling and compaction of utility trenches. Sweep or otherwise clean the sub-base clear of mud, loose and foreign material. Thoroughly dry sub-base before spreading base course.
3. 
Curbs. Where curbs are required, hold the edge of the wearing surface to line and grade by the installation of curbs in accordance with Section 12.3, Curbs. See Figures 11.2 and 12.1.
4. 
Base Course. After the sub-base has been properly prepared and the curbs or shoulder set, spread the base course for the full road width and in such volume as to provide a cross section conforming to the specifications and measurements of Table 11.1, Tables 11.2, and 12.1 after compaction with a fifteen ton vibratory drum roller or greater. Note section 305.03.1 of the referenced standard.
5. 
Base Course Surface. Following through compaction of the base course, spread the crusher-run gravel for the base course surface for the full road width to a depth of two inches after compaction with a fifteen ton vibratory drum roller or equivalent.
6. 
Application of Asphalt Surface. Asphalt shall be applied in accordance with the following specification:
a. 
The modified binder and surface courses shall consist of bituminous concrete placed to minimum depths conforming to the specifications of Table 11.2. Both layers shall meet the specifications of Section M.03 of the reference standard.
b. 
Placement of mixtures shall be by an approved self-propelled paving spreader equipment with a compactor. The paving machine shall be capable of paving not less than one full lane width and pavement depth from twin operator stations at the rear of the screed. The mixture shall be laid only upon a dry base containing no frozen materials swept clean of all debris, mud, or other loose material and when outside temperatures are above 50 degrees F. Mixtures shall be between 250 and 350 degrees F.
c. 
Compaction shall be effected by rolling with a fifteen ton vibratory roller of greater, equipped with a sprinkler system to wet the wheels or rolls. The finished surface will have a density of no less than ninety-six percent of voidless pavement composed of the same materials in like proportion. Upon completion of the application and compaction of the surface course, the street shall be closed to traffic for a minimum of twenty-four hours.
d. 
Traffic passing over newly constructed streets shall be limited to wheeled vehicles and no tracked equipment permitted.
e. 
All joints shall present the same texture, density and smoothness as other section of the course. The joints between successive day's work shall be made carefully in a manner to ensure a continuous bond between old and new sections. Where new pavement is to meet existing bituminous pavement, the existing pavement shall be sawed to a straight edge presenting a vertical face for its full depth so as to expose a fresh surface. This edge shall be painted with asphalt cement and the new pavement placed to meet this line smoothly.
f. 
All paving shall be done during the regular work hours of the Public Works Department. No weekend or holiday work will be acceptable.
A. 
Minimum Requirements. As required, streets shall be curbed with asphalt curbing as shown on Figure 12.1 as a minimum requirement. Curbing may be interrupted or perforated in places where stormwater runoff shall be conveyed to road side swales or other BMPs acceptable to the Planning Commission. Curbing shall be placed by suitable mechanical means in accordance with the materials for the road as specified.
1. 
Alternate curbing which is also acceptable shall be:
a. 
R.I. Standard #35 granite. See Figure 11.1.
2. 
At all street intersections, curb returns shall have a radius of at least twenty feet.
3. 
Granite curbing shall have a minimum base thickness of six inches, a minimum top thickness of six inches, a minimum depth of eighteen inches, and shall extend above the finished gutter grade. The horizontal and vertical alignment of the curbing shall conform to the established line and grade as shown on the approved plan and profiles.
4. 
All cape cod berms shall be five inches and formed and compacted in one piece with the surface course.
Construct sidewalks in accordance to the sidewalk cross-section as detailed in Figure 11.1 as follows:
A. 
Materials: Refer to Section 12.2 Street Construction, A. Materials.
B. 
Base Course: Compacted depth of six inches.
C. 
Base Course Penetration: Apply a minimum rate of 0.75 gallons per square yard. Allow application to stand for twenty-four (24) hours without covering, after which it may receive a light covering of course sand.
D. 
Surface Course: Compacted depth of two (2) inches, I-2 bituminous concrete in conformance with Section M.03.01 of the reference standard.
E. 
Observe same timing of successive steps, use limitations, and surface preparations as outlined for steps of road construction.
A. 
Earthwork and Drainage. The minimum subsurface drainage pipe size shall be eighteen inches of new class three reinforced concrete pipe. Upon review by the Planning Commission, and in consultation with the Public Works Director, the minimum size may be reduced to accommodate situations where smaller pipes are integral to the effective management of stormwater and the successful operation of LID BMPs.
Construct surface and subsurface stormwater structures and facilities to conform to the RI Stormwater Design and Installation Standards manual, and the following sections of the referenced standard, exclusive of any items therein covering methods of measurement and basis of payment.
1. 
Earthwork:
Section 203, Structure Excavation and Backfill
Section 204, Trimming and Fine Grading
Section 205, Trench Excavation
2. 
Drainage:
Section 701, Culverts and Storm Drains
Section 702, Manholes, Inlets, Catch Basins, and Headwalls
Section 703, Underdrains
Section 704, Paved Waterways
All catch basins and grates shall conform to RI DOT Spec. 4.31 and have a five foot minimum diameter with a three foot sump. Such standard specifications may be modified at the discretion of the Director of Public Works with the approval of the Planning Commission. Examples of modifications may include, but are not limited to, those situations where catch basins are used as pre-treatment devices in accordance with Stormwater Design and Installation Standards manual.
B. 
Manholes. Locate manholes on storm sewer trunk lines:
1. 
At maximum distances of three hundred feet;
2. 
At angles in the sewer lines, no curved designs will be acceptable;
3. 
At street intersections and other points where catch basins, inlets or laterals are to be connected;
4. 
At points where pipe sizes change;
5. 
At points where the grade of the sewer changes;
6. 
All catch basins shall conform to the referenced standards and shall be installed at intervals of three hundred feet or at such other intervals as may be required by the Director of Public Works.
7. 
Drainage frames and grates shall conform to RI Standard 6.3.4 High Capacity Frame and Grates (Bicycle Safe). See diagram on page 100A.
C. 
Minimum Cover. Provide subsurface drainage structures and facilities within street rights-of-way, with a minimum cover of three feet. Where required minimum cover is physically impossible to achieve, the Planning Commission will review for approval, an alternative proposal. Do not cover any installed work until it has been inspected and approved by the Director of Public Works.
D. 
Minimum Dimensions. All subsurface drainage structures shall be constructed using reinforced concrete pipe of an inside diameter no less than eighteen inches. The pipe joints shall be totally sealed with mortar cement. Upon review by the Planning Commission, and in consultation with the Public Works Director, the minimum size may be reduced to accommodate situations where smaller pipes are integral to the effective management of stormwater and the successful operation of LID BMPs.
E. 
Backfill Materials and Compaction. Drainage structures shall be backfilled utilizing compactable crushed gravel borrow material with stones no larger than two inches in any dimension. The materials shall be placed and compacted in layer not more than eight inches in depth after compaction. Compaction shall be achieved by mechanical tampers, vibrators or rammers in accordance with 202.03.6 of the reference standard. A period of thirty days shall pass after full mechanical compaction of all subsurface drainage structures in the right-of-way. If after twenty-one days, less than one inch of rainfall (measured at Green State Airport) has occurred, the structures shall be thoroughly drenched with water to the degree that water puddling is observed on the compacted material over the structures.
A. 
Location. Set at every lot corner, perimeter corner and angle point on the boundary line of the subdivision and at every angle point of curvature on the proposed street rights-of-way. Except in existing historic stonewalls where the angle change is less than ten degrees.
B. 
Materials. Quarry split (peen hammered top) granite or pre-cast reinforced concrete conforming in size and shape to the specifications below:
1. 
Dimensions:
a. 
At least thirty-six inches in length and four inches square in cross-section.
b. 
Place and center on top surface of the monument a drill hole one-half inch in diameter and three quarters of an inch deep.
c. 
Install at points indicated on preliminary plat.
C. 
Setting Monuments. Set so as not to protrude more than four inches above the finished grade.
Within ten feet of abutting property, limit changes to existing grade to a slope of 2:1. Provide retaining structures to contain slopes that exceed the 2:1 ratio. Rip-rap or other retaining walls shall be sloped back at an angle of no more than one foot horizontal to three feet vertical and constructed of boulders with at least three sharp angular flat or cut surfaces. The installation of rip rap walls shall be in conformance with accepted structural engineering practices. The construction of such shall be inspected and certified by means of a signed and stamped letter from a Rhode Island Registered Professional Engineer.
All soil erosion and sediment control measures required by these Regulations shall be constructed in accordance with the standards and procedures set forth in the 1989 Rhode Island Soil Erosion and Sediment Control Handbook, as may be amended from time to time. Said handbook is adopted as an Appendix to these Regulations and is available for review from the Administrative Officer.
A common private way in a residential compound shall have a right-of-way width between property lines of not less than twenty-four (24) feet and a travel way width of no less than twelve (12) feet. See Figure 12.2. A travel way is defined as that portion of a right-of-way that is actually used for vehicular travel. The Planning Commission may require additional right-of-way or travel way widths if conditions warrant for reasons of public health or safety. Notwithstanding any other provision of these Regulations, the travel way within a residential compound shall have no sidewalks and shall have a pervious surface composed of a two (2) inch layer of crushed stone [one-half (1/2) inch to two (2) inch crushed stone] on top of a normal base course as required by Section 12.2, Street Construction Standards. Adequate drainage appurtenances are required to prevent washout and excessive erosion. In addition, a turn-around or cul-de-sac may be required by the Commission if conditions warrant.