Chapter 15.09
PUBLIC WORKS CONSTRUCTION
Sections:
15.09.020 Director of operations – Powers.
15.09.070 Repealed.
15.09.080 Storm sewer design policies.
15.09.090 Repealed.
15.09.100 Water main construction practices.
15.09.110 Water service construction practices.
15.09.130 Wastewater main and wastewater service construction practices.
15.09.140 Wastewater system connection and discharge restrictions.
15.09.150 Repealed.
15.09.170 Public works construction specifications documents available to the public.
15.09.180 Repealed.
15.09.010 Purpose.
The purpose of this chapter is to establish standard practices for the construction of public works in new subdivisions, new construction projects, and restoration projects. This will allow engineers, surveyors, developers, contractors, and city of Cashmere employees to have minimum public works construction standard practices in the absence of specific project plans and specifications that shall be approved by the director of operations. Where references are made to comprehensive plans in this chapter, those references shall include all of the latest amendments or editions, and applicable CMC. (Ord. 1225 § 1, 2013; Ord. 883 § 1, 1996).
15.09.020 Director of operations – Powers.
A. The director of operations shall establish standard plans for specific details of public works construction when, in his opinion, it is needed to better show standard public works construction practices for the city of Cashmere.
B. The director of operations shall approve or disapprove specific public works project plans and specifications in a timely manner.
C. The director of operations shall administer all public works projects that are being constructed for or by the city of Cashmere.
D. The director of operations or his appointee shall inspect all public works projects for the city of Cashmere, during their construction, to ensure construction is being done in accordance with project plans and specifications or standard plans and specifications. (Ord. 1225 § 1, 2013; Ord. 883 § 1, 1996).
15.09.030 Standards – Compliance required.
Repealed by Ord. 1162. (Ord. 883 § 1, 1996).
15.09.040 Street design policies.
Repealed by Ord. 1162. (Ord. 943 § 4, 1999; Ord. 883 § 1, 1996).
15.09.050 Pedestrian access facilities design policies.
Repealed by Ord. 1162. (Ord. 943 § 5, 1999; Ord. 883 § 1, 1996).
15.09.060 Bicycle access design policies.
Repealed by Ord. 1162. (Ord. 943 § 6, 1999; Ord. 883 § 1, 1996).
15.09.070 Bus and other transportation facilities policies.
Repealed by Ord. 1162. (Ord. 943 § 7, 1999; Ord. 883 § 1, 1996).
15.09.080 Storm sewer design policies.
Design and construction policies for storm drains in the Cashmere Design Standards Manual are hereby adopted and shall be utilized for construction or reconstruction of storm drains within the city of Cashmere.
A. Roof drains, basement drains, or other storm water drains shall not be connected to the wastewater system, but pursuant to CMC 15.05.050(E) may be connected to the storm water system. All future subdivisions, commercial developments, and industrial developments shall have an engineered assessment of all possible storm water problems that may occur as a result of the development. A plan for control and discharge of storm water runoff shall be approved before development takes place and in place before occupation of the development.
B. Storm water drains, lines and systems located on private property shall be constructed, owned and maintained at the property owner’s expense. Any connection to any city storm drain main shall be subject to all city storm drain system development charges and connection fees. The city of Cashmere shall own and maintain only the storm water main lines.
C. Prior to introducing storm water runoff into the city’s storm water collection system every effort shall be made to implement a method for on-site retention and treatment. Methods may include one or more of the following to reduce the amount of water entering the city system or to control the timing of release into the system and to avoid or remove pollutants from the storm water:
1. Use of detention ponds or basin.
2. Use of infiltration pits and trenches.
3. Use of deep catch basins.
4. Use of artificial wetlands, habitat areas or open space.
5. Avoidance in collecting storm water runoff by minimizing the area covered by hard surfaces.
D. The design volume of storm water to be controlled shall be based on a rainfall intensity of one inch per hour and a duration of 40 minutes. Suitable engineering computer software shall be used in calculating the design solution.
E. When storm drains are enclosed into piping the following standards shall apply:
1. Pipe shall be PVC ASTM D3034, or when approved by the city PVC class PE shall be used. All pipe shall have a Manning number of 0.012.
2. Pipe shall be installed and bedded in at least six inches of bedding material, and at depths that receive gravity flow of all surface water and underground discharge pipes. (Ord. 1225 § 1, 2013; Ord. 943 § 8, 1999; Ord. 883 § 1, 1996).
15.09.090 Street lighting policies.
Repealed by Ord. 1162. (Ord. 943 § 9, 1999; Ord. 883 § 1, 1996).
15.09.100 Water main construction practices.
All water main pipe lines in new construction or reconstruction projects shall be made in accordance with the Cashmere Design Standards Manual.
A. All costs to extend a water main line to enable new water connections shall be paid for by the property owners that benefit by being eligible to connect to the new extension. A local improvement district or other benefit area may be established to finance water main extensions.
B. All water mains shall be constructed of ductile iron pipe. All fittings and appurtenances shall be constructed of ductile iron or cast iron as determined by the director of operations. All materials shall meet or exceed the appropriate American Water Works Association (AWWA) specifications. All water main lines shall be installed at least four feet below ground surface and in accordance with AWWA Specification C600. Water mains and appurtenances shall be disinfected in accordance with AWWA Specification C651. (Ord. 1225 § 1, 2013; Ord. 943 § 10, 1999; Ord. 883 § 1, 1996).
15.09.110 Water service construction practices.
All live water service connections to water mains shall be done only by city of Cashmere water and wastewater department personnel. All other connections from the water main to service the development may be installed by others; however, all installations must be completed as per the policies and standards of the Cashmere Design Standards Manual. The property owner shall pay for all costs related to the installation of a water service from the water main to the building being served, except the cost of the water meter. The property owner shall pay for all costs for repairs or replacement of the water service. (Ord. 1225 § 1, 2013; Ord. 943 § 11, 1999; Ord. 883 § 1, 1996).
15.09.120 Fire hydrants.
A. Water System. The city of Cashmere’s overall water system shall be designed and constructed to provide a fire flow of 3,500 gallons per minute for three hours plus the peak consumption. Required fire flow for residential districts is 1,500 gpm minimum. Fire flows for commercial districts shall be in accordance with Appendix B, Fire-Flow Requirements for Buildings, of the International Fire Code. Water mains shall be of such size as to provide a residual water pressure of at least 20 pounds per square inch at the fire hydrant at the required flow. Water mains and branches shall be at least six inches in diameter. Sizes shall be determined by the director of operations using field flow tests and/or system computer model.
B. Fire Hydrant Type. All new fire hydrants shall conform to AWWA Specification C502. They shall have two hose outlets having diameters of two and one-half inches national standard thread and a pumper port having a diameter of four inches national standard thread. Fire hydrants shall be equipped with quick connect couplings and be installed in accordance with the Cashmere Design Standards Manual.
C. Fire Hydrant Spacing. Within areas exclusively developed or being exclusively developed for residential purposes or M occupancy, the maximum distance from a fire hydrant to an access point of any lot shall be no greater than 300 feet along a public roadway. In commercial and other zones the maximum distance from a fire hydrant to the access point of a lot shall be 150 feet. When any portion of a commercial building to be protected is in excess of 150 feet from a fire hydrant on a public street and when required by the city of Cashmere fire chief there shall be provided on-site fire hydrants and mains capable of supplying the required fire flow.
D. Fire Hydrant Location. Wherever possible fire hydrants shall be placed at street intersections; provided, that when such location results in spacing distances greater than allowed by subsection C of this section, additional hydrants may be required between intersections; provided further, that when their required fire flow is greater than 2,500 gpm, the number and location of hydrants shall be determined by the director of operations and the fire chief.
1. For the purposes of this subsection, the following apply for commercial buildings exclusively:
a. The minimum number of public and private hydrants required shall be determined by dividing the required fire flow for the building by 1,500;
b. Hydrants shall be located no closer than 50 feet to any served building and at no greater distance than 150 feet from any portion thereof;
c. A hydrant shall be located not more than 150 feet from a sprinkler or standpipe connection.
2. All hydrants shall be accessible to fire department apparatus by roadways meeting city of Cashmere street specifications.
3. When fire protection facilities are to be installed by the developer or permittee, such facilities shall be installed prior to any combustible construction being installed on site. Water mains and fire hydrants shall be capable of delivering the required fire flow to the site and shall remain the responsibility of the developer until accepted by the director of operations in a written notification. When alternate provisions for protection are provided pursuant to subsection G of this section, the above requirements may be waived or modified.
4. When locating hydrants, consideration shall be given to:
a. Hazardous operations and the practicality of sound fire service practices (fences, roadways, barriers to operation, etc.);
b. The required 10-foot vehicle clear zone on each side of each hydrant.
E. Installation. Hydrants shall stand plumb and be set to the finished grade in accordance with the city of Cashmere standard plans. The bottom of the lowest outlet shall be no less than 12 inches above the grade. Whenever possible, there shall be a 36-inch radius of clear area about the hydrant for the operation of a hydrant wrench on the outlets and the control valve. The pumper port shall face the street, or, when the street cannot be clearly identified, shall face the most likely location of a fire truck while pumping as determined by the fire chief.
F. Plan Submittal and Review. Fire hydrant location and specifications shall be submitted to the director of operations along with the water system plan. The fire chief shall review all such plans along with the director of operations.
G. Waiver and Modification. The director of operations and city fire chief may grant a waiver or modification to the standards contained in subsection D of this section where strict compliance with such standards would create a substantial hardship on the applicant and where such a waiver or modification does not result in inadequate fire protection. Waivers or modifications shall be in writing, state the reasons therefor, and be provided to the city fire department.
H. Obstruction Prohibited. Obstructing the view, by any means, of a fire hydrant for a distance of 50 feet from any direction of vehicular approach is prohibited. (Ord. 1225 § 1, 2013; Ord. 943 § 12, 1999; Ord. 883 § 1, 1996).
15.09.130 Wastewater main and wastewater service construction practices.
All wastewater main lines shall be constructed of PVC pipe ASTM D3034. Design and construction policies for wastewater mains and wastewater service lines in the Cashmere Design Standards Manual are hereby adopted and shall be utilized for construction or reconstruction of wastewater systems within the city of Cashmere. The property owner shall pay for all costs related to the installation of a wastewater service from the wastewater main line to the building being served. All costs to extend a wastewater main line to enable new wastewater connections shall be paid for by the property owners that benefit by being eligible to connect to the new extension. A local improvement district or other benefit area may be established to finance wastewater main extensions. The property owner shall pay for all costs for repairs or replacement of the wastewater service. (Ord. 1225 § 1, 2013; Ord. 943 § 13, 1999; Ord. 883 § 1, 1996).
15.09.140 Wastewater system connection and discharge restrictions.
A. Storm water and sewer wastewater shall be collected and maintained in separate systems. The connection of roof, yard, and foundation drains to the sanitary sewer system is prohibited. If improvements to buildings, having existing prohibited drains, amount to 50 percent of the building value, the prohibited drains shall be disconnected from the sanitary sewer system and connected to the storm sewer system. Building construction and grading practices which permit surface water to enter the sanitary sewer system are prohibited.
B. Substances prohibited from being discharged into the wastewater system or treatment plant are listed in the Cashmere Design Standards Manual, hereby adopted and shall be strictly enforced by the director of operations. (Ord. 1225 § 1, 2013; Ord. 943 § 14, 1999; Ord. 883 § 1, 1996).
15.09.150 City light department construction and service policies.
Repealed by Ord. 1162. (Ord. 943 § 15, 1999; Ord. 883 § 1, 1996).
15.09.160 Survey monuments.
A. Survey monuments, in cast iron cases, complying with the Cashmere Design Standards Manual shall be installed at the centerline of all street intersections, at the centerline of the beginning and ending of all street curves, at the center of all cul-de-sacs, at the corners of all subdivisions, at city bench marks, and other vertical and horizontal control points. The typical five-eighths-inch rod, with the surveyor’s identification cap, may be used at other points, unless specifically otherwise specified by the director of operations;
B. All survey monumentation shall be referenced to the Washington State Coordinate System;
C. One reproducible copy, on drafting film, and similar to the one required for filing with Chelan County, of all surveys for subdivision of lands and binding site plans, within the city of Cashmere shall be filed with the city. Surveyors are requested to provide a paper copy of all other surveys done within the city of Cashmere so that the information can be entered into city’s computer mapping system. The city’s computer mapping information shall be made available to all surveyors who request information and are working within Cashmere. (Ord. 1225 § 1, 2013; Ord. 943 § 16, 1999; Ord. 883 § 1, 1996).
15.09.170 Public works construction specifications documents available to the public.
The Cashmere Design Standards Manual is available at Cashmere City Hall. Any person may obtain a copy thereof upon paying the costs for reproduction and/or printing of requested materials. (Ord. 1225 § 1, 2013; Ord. 943 § 17, 1999; Ord. 883 § 1, 1996).
15.09.180 Enforcement and penalties.
Repealed by Ord. 943. (Ord. 883 § 1, 1996).