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A. Professional Engineer: In conducting the studies referred to in section 17.16.030
of this chapter, the analysis and design of storm drainage flows and facilities shall be performed by professional engineers, acceptable to the city, competent in hydrology and hydraulics and shall be in accordance with sound engineer practices.
B. Promotion Of Economy: In developing the studies, every effort shall be made to promote economy in the proposed drainage design by selection of facilities for accommodating drainage flow and use of materials and methods of construction which provide the most advantageous balance between the cost of the facilities and the benefits received therefrom. Innovative approaches that reduce the overall requirement or cost of capital construction shall be encouraged.
C. Considerations: In all cases, flowrates shall be based upon conditions of future development of the city, taking into consideration the general plan of the city relating to the drainage area and other relevant factors, including changes in zoning or development that are not reflected on the general plan. (1999 Code; amd. Ord. 2020-05, 4-16-2020)
As studies and maps for individual drainage areas are completed in accordance with sections 17.08.050
and 17.08.060
of this title in areas where a private developer may construct an intermediate or major drainage system facilities to be used by others, the necessary major and intermediate drainage system facilities, together with the design capacity thereof, shall be shown on the map or maps. The map or maps shall be approved by the department and shall serve as designations of the respective drainage area boundaries and the drainage system requirements within the area. The map or maps may be subject to revision from time to time to conform with existing conditions, the results of additional studies and such other information as may be obtained from time to time. The map or maps shall be provided to the department in both paper and digital format for incorporation into the city graphical information system. (1999 Code; amd. Ord. 2020-05, 4-16-2020)
A. Unit Or System: The owner or developer of real property to be improved or developed shall provide, at their expense, the unit or subdivision drainage system facilities within each development necessary for the drainage and control of Excess Waters within the development consistent with the provisions of section 17.08.070
of this title.
B. Construction By City: The City may undertake the construction of the intermediate or major drainage system facilities required to convey any drainage waters to a trunk line, natural tributary or final destination within or at the boundary of the drainage area, as may be indicated on the drainage area map for the drainage area within which the development is located.
C. Drainage Fee Study: The developer or owner shall be responsible for the payment of a unit area drainage fee, which fee shall be applied toward the payment of all or part of the cost of the intermediate or major drainage system facilities constructed by the developer or to be constructed by the city in the area in which the development is located. In those cases where the development in question is traversed by or abutting intermediate or major drainage system facilities, the unit area drainage fees may be applied toward the construction of such facilities as provided in this title. If a study of the drainage area has not been completed, then the developer shall be required to perform a study of the needed drainage facilities for the drainage area where the development is proposed. The department reserves the right to waive the requirement of the drainage area study if the development size has been determined to be an insignificant impact to the drainage area. In the case where no study has been performed or will be required, payment of the drainage fee by the development is not required. (Ord. 2020-05, 4-16-2020)
A. Plans And Specifications: Prior to the final approval of a subdivision or development plan or building permit associated with a subdivision or development plan, or in the case of a single lot development, or a single building permit, the owner or developer shall, at their expense, have prepared by a professional engineer, acceptable to the city, detailed plans and specifications for the construction and installation of all unit or subdivision drainage system facilities for the control and drainage of excess water within the development, or the part thereof, and the carriage of such water to an acceptable intermediate or major drainage system facility or to a trunk line, natural tributary, or a final destination as agreed to by the city, all in conformance with the master plan of the drainage area or drainage basin as approved by the city, together with the estimated total cost of these facilities.
B. Assurance In Lieu Of Completion: In lieu of completion of the drainage system prior to final approval of the subdivision or development plan by the city, the developer or owner shall provide an acceptable financial assurance to the city that the drainage system will be constructed and installed as indicated and approved. Acceptable assurance shall consist of any one of the types of performance guaranties described in section 17.16.130
of this title.
C. Final Approval: Upon completion of review and approval by the city, the subdivision or development plan may be given final approval; provided, however, that no certificate of occupancy for any on-site building may be given final approval until installation of the drainage system facilities is complete. (Ord. 2020-05, 4-16-2020)
A. Required: Easements or rights of way or property that must be acquired for the installation of the intermediate or major drainage system facility shall be provided by the owner or developer, at the expense of the owner or developer. In the event the owner or developer is unable to acquire any necessary easement, right of way or property, and upon owner's or developer's written request, the city may negotiate to acquire the necessary easement, right of way, or property, failing which, the city shall: 1) submit to owner or developer a map showing an alternative route (in which event the owner or developer will endeavor to acquire the necessary easements, rights of way or property for such route); or 2) commence a condemnation action to acquire the easement or right of way for the drainage system facilities.
B. City Condemnation; Written Request: Owner's or developer's written request for city condemnation shall: 1) describe all prior efforts to acquire the easement, right of way or property; and 2) state the amount offered the owner of the property. Owner or developer shall pay the city all amounts to be paid to an owner or occupant of the property for the acquisition of any easements, rights of way or property, including all attorney fees incurred by the city or otherwise chargeable to the city. (1999 Code)
Upon completion of the plans and specifications by the professional engineer, and acquisition of the necessary easements, rights of way or property, the owner or developer shall then promptly proceed to cause that portion of the intermediate or major drainage system facilities to be installed, at the owner's or developer's sole expense, strictly in accordance with the plans and specifications thus prepared and approved. No facilities will be covered or backfilled until the same have been fully inspected and cover or backfill is authorized by the department. If any facility, or portion thereof, is covered without authorization, the department may require the facility to be reopened for inspection at the owner's or developer's cost. No unit or subdivision or an intermediate drainage system facility shall be connected to a major drainage system facility until the department has fully approved the facilities as constructed, and until satisfactory evidence has been presented to the department showing that all bills for labor and material and all other costs of constructing the line have been paid. (1999 Code; amd. Ord. 2020-05, 4-16-2020)
A. The department, or its designee, shall inspect the installation and, if the facilities meet the requirements of the plans and specifications, shall give the owner or developer notice of acceptance. Upon completion of the facilities, the owner or developer shall assign and convey to the city all of the owner's or developer's right, title, estate and interest in the facilities. The city shall thereafter be the owner thereof, and shall operate and maintain the same, subject to the provisions of this title.
B. Where it is found that conditions substantially differ from those stated or shown in the permit application, the city may stop further work until and unless approval is obtained from the city for a revised grading plan and stormwater management plan.
C. Civil design plans shall be maintained at the site during all phases of construction. Until the final inspection is made, the permit shall be prominently displayed near the front property line of the property involved so as to be visible from the street on which the property fronts.
D. In order to obtain inspections, the permittee shall notify the city twenty-four (24) hours before said inspection is to be made.
E. Construction field inspections shall be made:
1. Before commencement of excavation and after required construction stakes have been set;
2. When excavation has reached the bottom of the trench;
3. When infrastructure is assembled and prior to backfilling;
4. The interconnection of a drainage facility to a city owned drainage facility; and
5. Completion of site grading.
F. The owner or developer shall submit the following inspections and material tests to the city for review prior to asphalt paving over a drainage facility:
1. CCTV Inspection of storm drains;
2. Trench backfill compaction tests;
3. Base course compaction tests. (1999 Code; amd. Ord. 2020-05, 4-16-2020)
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