A. Improvement Procedures. In addition to other requirements, improvements installed by a land divider either as a requirement of these regulations, or at his own option, shall conform to the requirements of these regulations and improvement standards and specifications followed by the city, and shall be installed in accordance with the following procedure:
1. Improvement work shall not be commenced until plans have been checked for adequacy and approved by the city. To the extent necessary for evaluation of the proposal, the plans may be required before approval of the tentative plat of a subdivision or partition. No work shall commence until the developer has signed the necessary certificates and paid the subdivision development fees specified elsewhere in this division.
2. Improvement work shall not commence until after the city is notified, and if work is discontinued for any reason it shall not be resumed until after the city is notified.
3. Improvements shall be constructed under the inspection and to the satisfaction of the City. The city may require changes in typical sections and details in the public interest if unusual conditions arise during construction which warrant the change.
4. Underground utilities, sanitary sewers and storm drains installed in streets shall be constructed prior to the surfacing of the streets. Stubs for service connections for underground utilities and sanitary sewers shall be placed to a length obviating the necessity for disturbing the street improvements when service connections are made.
5. “As Built” construction plan revisions shall be filed with the city engineer within sixty days of the completion of any improvements.
B. The following improvements shall be installed at the expense of the subdivider unless specifically exempted by the Planning Commission:
1. Streets, including drainage and street trees;
2. Complete sanitary sewer system;
3. Water distribution lines and fire hydrants;
4. Sidewalks and any special pedestrian ways;
5. Street name and traffic-control signs;
7. Lot, street and perimeter monumentation;
8. Underground power lines and related facilities;
9. Underground telephone lines, CATV lines, natural gas lines, and related facilities;
10. Where dedicated or undedicated open space is proposed or provided, it shall be the subdivider’s responsibility to provide standard public improvements to and through that open space.
11. If fencing is being proposed as part of subdivision development, the subdivider shall be responsible for installing fencing along public streets and pedestrian ways. Fencing shall be constructed in accordance with the standards in Section 16.08.10
1. All streets, including alleys, within the subdivision and streets adjoining, but only partially within the subdivision shall be improved.
2. All public and private streets shall be constructed to city standards for permanent street and alley construction. LID alternatives, such as permeable surfacing and integrated stormwater management facilities, are required where site and soil conditions make it a feasible alternative. Upon completion of the street improvement, monuments shall be reestablished and protected in monument boxes at every street intersection and all points of curvature and points of tangency of street centerlines as required by Oregon Revised Statutes Chapter 92.
3. Street Trees. Street trees shall be provided consistent with the provisions of Chapter 12.32.
4. Prior to city approval of the final subdivision plat, all perimeter and back lot line monumentation shall be installed and the installation of the front lot monumentation (along and within street rights-of-way) shall be guaranteed. Any monuments destroyed during improvement installation shall be replaced at the developer's expense.
5. If any lot abuts a street right-of-way that does not conform to the design specifications of this ordinance, the owner may be required to dedicate up to one-half of the total right-of-way width required by this ordinance.
6. The proposed use shall not impose an undue burden on the transportation system. The City may require the applicant to provide adequate information, such as a traffic impact study, to demonstrate the level of impact to the surrounding street system. The developer shall be required to mitigate impacts attributable to the project.
7. The determination of impact or effect and the scope of the impact study should be coordinated with the provider of the affected transportation facility.
8. Dedication of land for streets, transit facilities, sidewalks, bikeways, paths, or access ways shall be required where the existing transportation system will be impacted by or is inadequate to handle the additional burden caused by the proposed use.
9. Improvements such as paving, curbing, installation or contribution to traffic signals, construction of sidewalks, bikeways, access ways, paths, or streets that serve the proposed use where the existing transportation system may be burdened by the proposed use.
D. Surface Drainage and Storm Sewer System.
1. Drainage facilities shall be provided within the subdivision and to connect the subdivision to drainage ways or storm sewers outside the subdivision, if necessary, as determined by the City.
2. Stormwater Management through Low Impact Development (LID). Low impact development is a stormwater management approach aimed at emulating predevelopment hydrologic conditions using a combination of site design and stormwater integrated management practices. This approach focuses on minimizing impervious surfaces, promoting rainfall evaporation and uptake by plants, and maximizing stormwater infiltration. Specific LID strategies and integrated management practices include:
a. Protection and restoration of native vegetation and soils,
b. Minimizing impervious surface area through use of pervious materials (e.g. pavers and pervious concrete).
e. Stormwater dispersion and bioretention (recharge).
3. All new subdivisions in Canby are required to treat stormwater on site. Stormwater management using LID practices is required where feasible, pursuant to requirements of this chapter and other applicable sections of this code. LID facilities shall be constructed in accordance with Canby Public Works Design Standards.
4. A conceptual stormwater management report must be submitted with the subdivision application. The report must demonstrate how and where stormwater will be managed on site at the subdivision. Where LID practices are not used, the applicant must demonstrate why LID is not feasible. The report will be reviewed by the Canby Public Works Department and shall be consistent with the Public Works Design Standards. Generally, the stormwater management plan must include the following:
a. A description of existing conditions including a map;
b. A description of the proposed stormwater system including a map;
c. An estimate of existing storm water run off;
d. An estimate of proposed storm water run off;
e. The detention/retention requirements; and
f. The discharge location, treatment method and sizing, and if discharging to the ground, the expected infiltration rates based upon soils mapping data.
5. Responsibility for maintenance of LID facilities shall be as follows:
a. The Canby Public Works Department shall be responsible for maintaining all LID facilities located within the public right-of-way, and for providing for the safety of the public as related to LID facilities,
b. Private property owners shall be responsible for maintaining all LID facilities on their property. The city reserves the right to inspect such facilities at any time. Upon written notice by the city to the owner that the facility has been compromised to the point where the design capacity is no longer available or the facility is not functioning as designed and approved, the owner shall correct the problem. If the owner fails to respond to the written notice within 15 days, the city may undertake the work and bill all time and material to the owner.
c. For LID facilities that are not located in the public right-of-way and serve multiple private residential properties, a public easement for the LID facility shall be established and the Canby Public Works Department shall be responsible for maintenance of the facility. All property owners served by the facility shall pay a stormwater maintenance fee to the city to cover the cost of maintenance of the facility.
E. Sanitary Sewers. Sanitary sewers shall be installed to serve the subdivision and to connect the subdivision to existing mains. In the event it is impractical to connect the subdivision to the city sewer system, the commission may authorize the use of septic tanks if lot areas are adequate, considering the physical characteristics of the area. The commission may require the subdivider to install and seal sewer lines to allow for future connection to the city system.
F. Water System. Water lines and fire hydrants serving the subdivision and connecting the subdivision to city mains shall be installed to the satisfaction of the supervisor of the water department and the Fire Marshal.
G. Sidewalks. Sidewalks shall be required on both sides of a public street and in any special pedestrian way within the subdivision, except that in the case of identified arterials, or industrial districts, the commission may approve a subdivision without sidewalks if alternative pedestrian routes are available. Sidewalk construction may be postponed until the actual construction of buildings on the lots, provided that adequate assurance is given that such sidewalks will be installed. Where LID practices are implemented in subdivision street design, alternative sidewalk design may be permitted with the approval from the city. Alternative sidewalk design resulting from LID best management practices may include, but not limited to: flat curbs, LID bioretention areas incorporated in conjunction with required landscaping, and alternative sidewalk widths. LID best management practices shall be designed in accordance with the Canby Public Works Design Standards.
H. Bicycle Routes. If appropriate to the extension of a system of bicycle routes, existing or planned, the commission may require the installation of bicycle lanes within streets or the construction of separate bicycle paths.
I. Street Name Signs. Street name signs shall be installed at all intersections according to city standards or deposit made with the city of an amount equal to the cost of installation.
J. Street Lighting System. Streetlights shall be required to the satisfaction of the manager of the Canby Utility Board.
1. Curb cuts and driveway installation are not required of the subdivider but, if installed, shall be according to city standards.
2. Street tree planting is required of the subdivider and shall be according to city requirements.
3. The developer shall make necessary arrangements with utility companies or other persons or corporations affected, for the installation of underground lines and facilities. Electrical lines and other wires, including but not limited to communication, street lighting and cable television, shall be placed underground, unless overhead installation has been specifically approved by the commission because of unique circumstances at the site.
4. Developments along existing rail lines may be required to provide barrier fences or walls if necessary ensure safety for development occupants. City may also require noise mitigation such as sound walls, or triple-pane windows in order to reduce the health impacts of train noises. Noise mitigation requirements shall be based on measured db levels when trains are in the vicinity and specific building construction features.
L. Improvements in Areas of Flood or Slope Hazard.
1. Any public utility or facility associated with a subdivision or partition within an area subject to flooding shall be designed, located, and constructed so as to minimize or mitigate flood damage and shall not result in raising the water elevation in a designated floodway beyond the limits prescribed by the Federal Flood Insurance Program.
2. A new or replacement water supply system shall be designed, located and constructed to minimize or eliminate infiltration of flood waters into the system.
3. A new or replacement sanitary sewage system shall be designed, located and constructed to minimize or eliminate infiltration of flood waters into the system.
4. An on-site septic tank system or other individual waste disposal shall be located to avoid impairment or contamination during flooding.
5. Any public utility or facility, including streets, associated with a subdivision or partition within an area which is subject to flooding or slope instability shall be designed, located and constructed so as to amply protect such public utility or facility from damage due to such natural hazards. Adverse impacts upon fish, wildlife, and open space resources shall also be considered in the design and construction of such facilities. The commission and council shall consider the potential repair or maintenance costs to be borne by the public when reviewing the proposed design, location, and construction of such public utilities or facilities.
M. Survey Accuracy and Requirements. In addition to meeting the requirements as set forth in Oregon Revised Statutes relative to required lot, street and perimeter monumentation, the following shall be required:
1. An accuracy ratio of subdivision plat boundary line closure of one in ten thousand (.0001) feet as found in the field.
2. Two primary perimeter monuments (one of which can be the initial point) having the same physical characteristics as the initial point. The monuments are to be on a common line visible, if possible, one to the other at time of approval and preferably at angle points in the perimeter. They shall be points as far apart as practicable. A survey monument witness sign of a design acceptable to the city engineer shall be placed within eighteen inches of both monuments. The position for the initial point and other primary perimeter monuments shall be selected with due consideration to possible damage during construction and desirability of witness sign location.
3. Street centerline monumentation shall consist of a two-inch diameter brass cap set in a concrete base within and separate from a standard monument box with cover (standard city details applicable) at locations specified by the city engineer (generally at intersections with centerline of arterial or collector streets and within streets proposed to be greatly extended into adjacent future subdivisions). All other street centerline points (intersections, points of tangent intersections, cul-de-sac center lines, cul-de-sac off-set points) shall be monumented with a five-eighths-inch diameter steel rod thirty inches long with an approved metal cap driven over the rod and set visible just below the finish surface of the street. If any points of tangent intersection fall outside of a paved section street, the above monumentation will be required at point of curvature and point of tangency of the curve. All centerline monuments are to be accurately placed after street construction is complete.
N. Agreement for Improvements. Before commission approval of a subdivision plat or partition map, the land divider shall either install required improvements and repair existing streets and other public facilities damaged in the development of the property, or execute and file with the city engineer, an agreement specifying the period within which required improvements and repairs shall be completed and provided that, if the work is not completed within the period specified, the city may complete the work and recover the full cost and expense, together with court costs and reasonable attorney fees necessary to collect the amounts from the land divider. The agreement shall also provide for reimbursement to the city for the cost of inspection by the city which shall not exceed ten percent of the improvements to be installed.
1. The land divider shall file with the agreement, to assure his full and faithful performance thereof, one of the following:
a. A surety bond executed by a surety company authorized to transact business in the state in a form approved by the City Attorney;
b. A personal bond cosigned by at least one additional person, together with evidence of financial responsibility and resources of those signing the bond, sufficient to provide reasonable assurance of ability to proceed in accordance with the agreement;
2. Such assurance of full and faithful performance shall be for a sum approved by the city engineer as sufficient to cover the cost of the improvements and repairs, including related engineering and incidental expenses, and to cover the cost of the city inspection.
3. If the land divider fails to carry out provisions of the agreement and the city has unreimbursed costs or expenses resulting from such failure, the city shall call on the bond or cash deposit for reimbursement. If the cost of expense incurred by the city exceeds the amount of the bond or cash deposit, the land divider shall be liable to the city for the difference.
P. Guarantee. All improvements installed by the subdivider shall be guaranteed as to workmanship and materials for a period of one year following written notice of acceptance by the city to the developer. This guarantee can be warrantied under the same options listed in Section O above.
Q. Large Scale or Solar Efficient Development. The standards and requirements of this division may be modified by the commission in the case of a plan and program for a complete community, a neighborhood unit, a solar efficient design, a large scale shopping center, or large industrial development, which in the judgment of the commission provides adequate public spaces and improvements for the circulation, recreation, light, air and service needs of the developed tract and its relation to adjacent areas, and which also provides such covenants or other legal provisions as will assure conformity to and achievement of the intents and purposes of the Comprehensive Plan. (See Division V for information regarding a planned unit development.)
R. No fence/wall shall be constructed throughout a subdivision where the effect or purpose is to wall said project off from the rest of the community unless reviewed and approved by the Planning Commission. (Ord. 740 section 10.4.40(C)(7), 1984; Ord. 899 section 4, 1993 Ord. 955 sections 28 & 29, 1996; Ord. 1043 section 3, 2000; Ord 1237, 2007; Ord. 1338, 2010; Ord. 1340, 2011; Ord. 1514, 2019)