No land shall be dedicated by any owner of real estate for acceptance as a public street or highway by the Town of Harwinton, nor shall any street or highway be constructed by any owner of real estate for acceptance as a public street or highway, except in accordance with the provisions of this article. No land shall be accepted as a public street or highway by the proper authority of the Town except in accordance with the provisions of this article.
[Adopted 1-12-1999 by Ord. No. 101, effective 1-29-1999]
Each street or highway dedicated for acceptance by the Town shall conform to the following standards:
A.
Right-of-way. A right-of-way, not less than 50 feet in width, shall be dedicated for highway purposes together with all rights-of-way and easements, not less than 40 feet in width, that may be necessary for the proper drainage thereof.
B.
Grade and alignment. The minimum grade for any street or highway shall be 1% and the maximum grade shall not exceed 10%, except where approved by the Town of Harwinton Planning Commission (hereafter referred to as the "Commission") in cases where topography warrants and safety will not be adversely affected. The minimum radius of curvature at the center line of streets shall be 200 feet. Appropriate vertical curves for transition shall be established on any street and at street intersections to ensure adequate sight distance.
[Amended 10-28-2003 by Ord. No. 111, effective 11-14-2003]
C.
Intersections.
(1)
The center line of all streets entering an intersection shall:
(2)
Proposed streets shall intersect other streets at right angles radially, or as approved by the Commission, provided that in no case shall the angle of intersection between adjoining street lines be less than 60°.
[Amended 10-28-2003 by Ord. No. 111, effective 11-14-2003]
(3)
Proposed streets shall intersect other streets such that pavement slope on the proposed street averages no more than 3% within 200 feet of the intersection. The Commission can increase the average slopes to 4% if deemed prudent.
[Amended 10-28-2003 by Ord. No. 111, effective 11-14-2003]
(4)
Street lines at intersections shall be connected by a curve having a minimum radius of 25 feet.
(5)
Proposed streets shall intersect other streets such that the horizontal center line of the proposed street shall be a straight line of at least 100 feet from the intersecting street lines unless otherwise approved by the Commission.
[Amended 10-28-2003 by Ord. No. 111, effective 11-14-2003]
(6)
Intersections shall have unobstructed vision from a driver's eye (located at a height of 3.5 feet above the surface of the proposed road and a location 20 feet back from the edge of the travel way of the intersected road) along both directions of the intersected road that is in conformance with current CTDOT and AASHTO standards for the 85th percentile speed. The desirable sight distance shall be provided whenever possible, and no road shall be approved that does not provide for the minimum sight distance.
(7)
Such sight distance shall not be impaired by curvature or grade, except in extreme conditions, in which adequate alternative safety measures shall be designated. At a street intersection, no obstruction to sight over three feet in height from street grade shall be allowed within 25 feet of the lot line intersection.
D.
Turnarounds. A turnaround shall be provided at the closed end of a cul-de-sac. The turnaround shall be in a teardrop or circular shape with a paved radius of 50 feet and shall have a minimum of a six-inch crown in the center and be pitched so that surface water flows to the perimeter. The cul-de-sac perimeter shall be constructed so gutter flow grades exceed 1% to drainage structures, either at each side of the entrance to the cul-de-sac or a drainage structure at the rear if the elevations require the cul-de-sac to be lower at the far end than at the entrance, or a combination of both. Additional catch basins may be required based on topography and planned driveway flows as recommended by the Town Engineer and Highway Supervisor who must review and approve the ultimate design. The minimum radius for curvature for the right-of-way for turns shall not be less than 10 feet. A sufficient right-of-way for a turnaround on a temporary cul-de-sac, which may, at some future date, be projected into adjoining property, shall be provided by means of a temporary easement providing for automatic termination of the easement upon extension of the street.
[Amended 10-28-2003 by Ord. No. 111, effective 11-14-2003; 6-17-2008 by Ord. No. 124, effective 7-4-2008]
E.
Pavement and cross section. Streets shall be designed with the pavement centered in the right-of-way. The right-of-way adjacent to the curb and for a width of six feet shall be graded to the top of the curb, if any, or to the edge of the pavement at a slope of 1/2 inch per foot; grading beyond the six-foot width shall not exceed one foot of rise or fall for each two feet of horizontal distance, or such lesser slope as is necessary to maintain the stability of the slope. A typical cross section drawing shall be shown on the construction plans and shall indicate a standard location for water mains, storm drains, sanitary sewers, gas mains, and underground electric, telephone and CATV lines. A twenty-four-foot width of pavement inside to inside of curbline shall be provided for all types of streets.
F.
Traffic control devices and street name signs. Traffic control devices and street name signs shall be installed at all street intersections in locations designated by the Town. Such signs shall be in accordance with the latest revision of the Uniform Manual of Traffic Control Devices.
G.
Streetlighting. Streetlighting shall be provided, if deemed necessary by the Town. Such lighting shall be of the type approved by the Town. Power consumption at a fixed rate per luminaire shall be paid in advance to the Town by the applicant for a period not to exceed two years.
H.
Base course. A base course not less than 16 inches in depth and for the full width of the pavement and curb bases shall be constructed in two layers. The bottom subbase layer shall consist of 10 inches of granular fill (Item M.02.01) and a top layer of six inches of processed aggregate base (Item M.05.01) in accordance with the latest Connecticut Department of Transportation specifications. Construction methods, tolerances and standards shall be in accordance with Section 2.12, Subbase, of the latest Connecticut Department of Transportation specifications. Material certificates shall be submitted for all subbase and base material in accordance with Section 1.06.07 of the latest Connecticut Department of Transportation specifications.
I.
Surface course. The paved surface shall have a total thickness of 3 1/2 inches and shall have a cross slope of 1/2 inch per foot from the center line and shall be constructed of two courses of bituminous concrete, a two-inch binder course and a one-and-one-half-inch surface course (Class 2), after compaction. Construction methods shall conform to the latest Connecticut Department of Transportation specifications. No paving is to take place until all underground utility work within the right-of-way has been completed. The Board of Selectmen or its representative may ask for the completed pavement course to have the mat and longitudinal joints tested at the applicant's expense to verify field compaction of the pavement. Each course placed at the depth of 1 1/2 inches or greater shall have the mat and longitudinal joints compacted to a minimum of 92% and no more than 97% density as determined by AASHTO T209 (modified) standard, using the nuclear density method by means of a nuclear gauge. Prior to Planning Commission recommendation to the Board of Selectmen for road acceptance, the applicant must provide acceptable written documentation of all testing to the Planning Commission and Town Highway Supervisor.
[Amended 6-17-2008 by Ord. No. 124, effective 7-4-2008]
J.
Curbing. All streets shall be curbed along their entire length with bituminous concrete lip curbing conforming to Section 8.15 of the latest Connecticut Department of Transportation specifications.
K.
Shoulders and embankments. Rough grade to six inches below the finished surface elevation and spread topsoil to a six-inch minimum depth. Fine grade, fertilize, seed and mulch in accordance with Section M.13 of the latest Connecticut Department of Transportation specifications.
L.
Culs-de-sac. A permanent cul-de-sac is a street which is not to be extended into adjoining property. A temporary cul-de-sac is a street which may be extended into adjoining property.
(1)
Permanent culs-de-sac. Unless specifically approved by the Commission, permanent culs-de-sac shall not exceed a length of 1,200 feet. The paved portion of the street shall be extended a distance sufficient to provide the minimum frontage required for the abutting lots.
(2)
Temporary culs-de-sac. Temporary culs-de-sac may exceed a length of 1,200 feet but shall not exceed a reasonable interim length for safe and convenient vehicular access, including emergency vehicles, as determined by the Commission. The paved portion of the street shall be extended a distance sufficient to provide the minimum frontage required for the abutting lots. The section reserved for future access to the adjoining property need not be improved; however, the developer shall rough grade the reserved section and shall prepare and stabilize all slopes made necessary by the extension of the street.
M.
Street names. Streets shall bear names which are appropriate to the character of the Town and which do not duplicate or too closely approximate in spelling or sound existing names in the Town or any adjoining municipality. All street names shall be subject to the approval of the Commission.
N.
Monuments. Monuments shall be provided on both sides of the street right-of-way and shall be set at the beginning and termination of each street and at each point of deflection, curvature and tangency. Monuments shall be of stone or reinforced concrete 30 inches in length and four inches square at the top, with a cross or other measuring feature in the top center. Monuments shall be set 28 inches in the ground after all project grading is complete. If ledge is encountered, a brass plug 1/2 inch by three inches shall be set in the ledge and secured with a portland-type cement mortar.
O.
Underground utility lines. New electric, communication and other wires shall be installed underground unless the Commission determines, based on a written report submitted by the applicant, that such underground installation is inappropriate or unfeasible for all or part of the subdivision. In making such determination, the Commission shall take into account the type of service existing in the area adjacent to the subdivision, topographic and construction conditions, and the size of the subdivision. Whenever possible, such underground utilities shall not be located under the street pavement.
Storm drainage shall be planned and designed in a manner capable of acceptance for public use and maintenance by the Town of Harwinton. Storm drainage shall be designed and constructed in accordance with the ordinances of the Town of Harwinton and the standards set forth in the current Subdivision Regulations.
A.
General. A storm drainage system is a closed system which conveys storm runoff from the entire area of the subdivision. The design must take into account any land which would normally drain across the subdivision and the effect upon downstream drainage systems. The design should minimize any adverse effects on adjacent property and be in compliance with all governmental codes and regulations, including the following:
B.
Provisions. Catch basins, gutter inlets, manholes, collector pipes, and the main trunk line of the storm drainage system must provide for:
(1)
Adequate drainage of proposed streets, accounting also for future extensions thereof into adjoining property, by means of pipes, culverts, catch basins, and appurtenances.
(2)
Interception or management of channeled drainage coming from any adjoining property or street.
(3)
Protection of locations necessary for on-site sewage disposal and water supply facilities and driveways and building sites.
(4)
Prevention of soil erosion, sedimentation, and flooding by provision of silt basins, stormwater detention facilities or other construction and control measures.
(5)
Improvement of existing drainage systems to accommodate additional flowage generated by the subdivision, when completed.
(6)
Drainage facilities shall be located within the street right-of-way where feasible, or in perpetual unobstructed easements where necessary.
C.
Storm drainage design. The design of storm drainage facilities shall be based upon the maximum ultimate development of the watershed permitted under the current Zoning Regulations.
(1)
Drainage shall be designed under the Rational Formula whereby Q = CiA.
(2)
Runoff factors must be approved by the Town Engineer.
(4)
The pipe system should flow full for the calculated total flow.
(5)
The system should operate under pressure with a free outfall. However, a system operating under surcharge with a submerged outflow would be considered.
(6)
The HGL (hydraulic grade line) should not rise to within 2.0 feet of any manhole cover or top of any inlet at the design discharge.
(7)
The HGL should not rise to a level that would flood any subdrain outfalling into the storm drain system.
(8)
Minimum slope of all pipes shall be 0.4%.
(9)
Energy dissipaters, stilling basins, or other approved devices must be incorporated when design slopes exceed 8.0%.
(10)
The minimum cover over the top of the pipe shall be three feet.
(11)
Manholes shall be provided at all deflection points and/or the junction of two or more lines.
(12)
Catch basins should be spaced to the following standards:
D.
Discharge. The discharge of all stormwater that has been collected or otherwise artificially channeled shall be into suitable natural streams or into Town or state drainage systems with adequate capacity to carry the discharge. There shall be no discharge onto or over private property within or adjoining the subdivision unless proper easements and discharge rights have been secured by the applicant, such easements and rights are transferable to the Town in the event that the discharge includes stormwater from any street, and proper provisions are made to safeguard against soil erosion and flood danger. No stormwater shall be diverted from one watershed to another. Discharge shall be made in a manner that protects streams, ponds and swamps from pollution.
[Amended 10-28-2003 by Ord. No. 111, effective 11-14-2003]
E.
Drainage construction.
[Amended 10-28-2003 by Ord. No. 111, effective 11-14-2003]
(1)
Pipe materials. Corrugated metal pipe (CMP) or corrugated polyethylene pipe (HDPE) (Type S smooth interior surface only) or reinforced concrete pipe (RCP) joint sealants and bedding material shall conform to Article M.08.01 of the latest revision of the Connecticut Department of Transportation's Standard Specifications for Roads, Bridges, and Incidental Construction.
(2)
Methods. Trench excavation and backfill shall conform to Section 2.05 of the latest Connecticut Department of Transportation specifications. Corrugated metal pipe (CMP) or reinforced concrete pipe (RCP) or corrugated polyethylene pipe (HDPE), joint sealants and bedding installation shall conform to Section 6.51 of the latest revision of the Connecticut Department of Transportation's Standard Specifications for Roads, Bridges, and Incidental Construction.
(3)
Appurtenances. Catch basins, manholes, drop inlets, end walls, and other appurtenances to the storm drainage system shall be constructed in accordance with Section 5.07 and Article M.08.02 of the latest revision of the Connecticut Department of Transportation's Standard Specifications for Roads, Bridges, and Incidental Construction.
(4)
Special structures. Bridges, box culverts, and other special structures shall be designed and constructed in accordance with sound engineering practice and the latest revision of the Connecticut Department of Transportation's Standard Specifications for Roads, Bridges, and Incidental Construction. Bridges shall be designed in accordance with the latest revision of the Standard Specifications for Highway Bridges as adopted by the American Association of State Highway and Transportation Officials (AASHTO).
(5)
Underdrains. At the base of uphill shoulder embankments and as elsewhere ordered by the Commission, a minimum six-inch diameter perforated pipe continuous underdrain shall be installed behind the curbing in accordance with Section 7.51 of the latest Connecticut Department of Transportation specifications, except that the aggregate shall be limited to broken stone of screened gravel conforming to Article M.01.01 for three-eighths-inch stone.
No owner of real estate to be dedicated for acceptance by the Town of Harwinton as a public street or highway and no other person, firm or corporation shall construct a street or highway for acceptance by the Town until the following requirements have been met:
A.
Maps and plans. A map of the right-of-way for the street or highway and construction plans for streets, drainage and other improvements shall be presented to, and approved by, the Board of Selectmen.
B.
Permit. No construction and installation of streets, drainage and other improvements shall be commenced until a road construction permit has been issued by the Board of Selectmen or its authorized agent.
C.
Inspection. All construction of the street or highway shall be carried out subject to supervision and inspection by the Board of Selectmen or its authorized agent.
The Board of Selectmen shall have the responsibility for administration and enforcement of this article. In carrying out its duties, the Board of Selectmen is authorized as follows:
A.
Procedure. To adopt policies, rules and procedures, as well as standards and specifications, necessary to conduct its duties and enforcement of this article.
B.
Fees. To establish from time to time reasonable fees for issuance of a road construction permit and for supervision and inspection of construction under an approved permit.
C.
Alternate standards. To approve alternate design and construction standards for streets, drainage and other improvements when:
(1)
Such standards are prepared by a licensed professional engineer authorized to practice in the State of Connecticut;
(2)
The Board of Selectmen determines that such standards will be in accord with the purpose and intent of § 297-31 of this article; and
(3)
Such alternate standards are determined by the Planning Commission to be in accordance with the purpose and intent of the Commission's Subdivision Regulations.
The Town of Harwinton acting by Town Meeting is authorized to accept as a public street or highway land dedicated by an owner of real estate, subject to the following conditions:
A.
Map. There shall be on file in the office of the Harwinton Town Clerk a map of the right-of-way of the street or highway, together with all rights-of-way and easements that may be necessary for the proper drainage of the street, and showing the location of permanent monuments. The map shall be prepared by and bear the seal of a land surveyor or professional engineer licensed as such by the State of Connecticut.
B.
Application. The owner shall make written application to the Board of Selectmen for such acceptance, and the application shall be accompanied by the following:
(1)
As-built plans. Construction plans of the street or highway showing the street, drainage, utilities and other improvements as built, together with a licensed surveyor's or professional engineer's certification that all improvements are within the boundaries of the highway or any easement granted.
(2)
Conveyances. A warranty deed free and clear of all encumbrances to the right-of-way being designated as a public street or highway and easement deeds, in suitable and standard form, for drainage or other purposes encompassing land not located in the right-of-way of the public street or highway. The conveyance of title shall be accompanied by an attorney's title certificate and mechanic's lien waiver, or an owner's title insurance policy affirmatively insuring against the same, issued to the Town of Harwinton.
(3)
Maintenance bond. An executed agreement and bond to guarantee maintenance of, and to cover unforeseen deficiencies in, the construction of the street, drainage, and other improvements for a period of 18 months after the date of acceptance of the street.
D.
Planning Commission. Not less than 35 days prior to acceptance of the street or highway, the Board of Selectmen shall refer the application for acceptance to the Harwinton Planning Commission for a report, unless the Planning Commission has approved the road or street as a part of a subdivision.
E.
Town Meeting. The Board of Selectmen shall call a Town Meeting for acceptance of the street or highway within a reasonable time after receipt of a completed application. A Town Meeting shall not be held until such time as the Planning Commission has voted on acceptance of the street or highway pursuant to Connecticut General Statutes § 8-24 or until 35 days after referred to the Commission pursuant to § 8-24, whichever occurs first.