16.12.090 - Compliance with standards.

A.

All improvements required under this chapter shall be constructed in accordance with Section 16.12.160. All improvements required under this chapter shall be the minimum required improvements for all plats; however, higher development standards may be imposed for the protection of public health, safety or general welfare.

B.

All required improvements shall be made by the developer at his or her expense.

(Ord. 496 § 8.0, 1999: Ord. 462 § 8.0, 1998)

16.12.100 - Street improvements.

A.

Streets. All public streets shall be constructed with paving, curbs and gutters, storm drainage system, sidewalks and street lighting.

B.

Alleys. Alleys when installed shall be improved as described in Section 16.12.050.

C.

Sidewalks. Sidewalks shall be included in the street improvement plans and shall be installed on both sides (or one side if a local access street) of the street after completion of the curb and gutter improvements. Sidewalks shall be constructed when homes are constructed on the lots and shall be completed prior to occupancy, provided that an agreement with adequate surety is submitted to guarantee sidewalk improvements in accordance with Section 16.16.120(D)(2).

D.

Street Lighting System. Street lights shall be installed at all intersections (street corners), all cul-de-sac turnarounds and all substantial curves of streets. The developer shall make the necessary arrangements with the serving electric utility for installation of underground service for the street lighting system. When required, street lighting conduit poles and pole boxes shall be provided at the time of construction in accordance with the requirements of the town engineer. Street lighting systems intended for dedication to the town shall be assemblies approved by the town engineer. Alternative assemblies are subject to the requirements of Section 16.12.170.

E.

Street Trees. Street trees may be installed within one year of when new homes are first occupied, provided that such trees are from the town of Naches street tree list and are spaced and installed in accordance with standards set forth in the list. If street trees are be installed, an agreement with adequate surety shall be submitted to guarantee the street tree planting. The developer shall be responsible for the continued health and vigor of street trees abutting undeveloped lots until such lots are sold.

(Ord. 496 § 8.1, 1999: Ord. 462 § 8.1, 1998)

16.12.110 - Water distribution system.

A.

A complete domestic water distribution system shall be installed to provide potable water to each lot within a development (including homes, businesses and industry) under this article. The domestic water system shall be installed at the expense of the developer in conformance with standards as established by the town engineer and approved by the town. All water lines and services shall be inspected and approved by the town engineer and installed prior to street improvements.

B.

The water distribution system shall be designed and constructed in accordance with the state Department of Health regulations and with the standard practices of the town. Fire hydrants shall be installed at the expense of the developer, at locations determined necessary by the town and the town engineer. Water mains and sewer lines shall be extended to the far edge of any subdivisions for future extensions.

C.

The town, at its discretion, may direct that water main diameters in excess of that needed for service and fire protection for the subdivision be installed. If the town directs such oversizing, the town will pay the difference in pipe material costs between the pipe diameter required for the subdivision and the town-directed oversize diameter pipe.

(Ord. 496 § 8.2, 1999: Ord. 462 § 8.2, 1998)

16.12.120 - Provision of irrigation water.

A.

Pursuant to RCW 58.17.310, as amended, each lot within a plat shall be provided with an irrigation water right-of-way. It shall be the responsibility of the developer to provide an irrigation system to supply water to each lot within the development.

B.

Under no circumstances will irrigation water supplies be cross-connected to the municipal water system.

C.

All irrigation water systems serving new development shall be privately owned, operated and maintained. Arrangements must be made with the town to provide irrigation water if a private system cannot be established.

(Ord. 496 § 8.3, 1999: Ord. 462 § 8.3, 1998)

16.12.130 - Sanitary sewer system— Storm sewers.

A.

A complete sanitary sewer collection system with a separate connection to the town sewer system shall be provided to each lot or unit within a development (including homes, business and industry) and shall be inspected and approved by the town engineer prior to construction of street improvements. Such sanitary sewer collection system shall be installed at the expense of the developer.

B.

The sanitary sewer system shall be designed and constructed in accordance with the state Department of Ecology regulations and the standards of the town. Sewer mains shall be extended to the far side of any lot within a plat.

C.

The town, may, at its discretion, direct that sewer main diameters in excess of that needed for service for the plat be installed. If the town directs such oversizing, the town shall pay the difference in cost, if there are additional costs, between the pipe diameter required for the subdivision and the town-directed oversized pipe.

D.

As required by the engineer, storm drainage shall be disposed on-site through facilities designed by a professional engineer in conformance with Department of Ecology requirements and as approved by the town engineer. Storm drainage shall be designed such that drainage from new development does not conflict with present drainage patterns, create a drainage problem within itself or for its neighbors or cause environmental degradation of surface and ground water.

E.

All required sanitary sewer lines and storm sewers located within the street improvement section shall be completed in accordance with Section 16.12.160, Public facilities standard plans, and shall be inspected and approved by the town engineer prior to construction of street surface improvements.

(Ord. 496 § 8.4, 1999: Ord. 462 § 8.4, 1998)

16.12.140 - Fire protection.

A.

Water sources and facilities adequate for fire protection purposes shall be provided in every subdivision by the developer.

B.

Fire protection facilities, including fire hydrants and appurtenances, shall be provided in accordance with the Uniform Fire Code under the direction and approval of the fire marshal. Such facilities shall be included in the improvement plans as approved by the town engineer.

(Ord. 496 § 8.5, 1999: Ord. 462 § 8.5, 1998)

16.12.150 - Underground utilities.

A.

Except as provided in subsection B of this section, all utility facilities shall be placed underground.

B.

Facilities excepted from underground utility installation. Underground installation of utility facilities shall not include the following:

1.

Electric, pad mounted transformers;

2.

Electric transmission systems of a voltage of fifteen (15) KV or more;

3.

Service meters at structures;

4.

TV cable amplifiers, distribution taps;

5.

Telephone pedestals and cross-connection terminals; and

6.

Temporary services necessary for construction.

C.

No buildings or structures, except fences, shall be permitted to be constructed on any utility easements, or over any utility facilities. Masonry fences will be considered as structures rather than fences.

(Ord. 496 § 8.6, 1999: Ord. 462 § 8.6, 1998)

16.12.160 - Public facilities standard plans.

All public facilities shall be designed and constructed in accordance with the town of Naches standard plans as outlined below. The standard plans are administered by the town engineer.

A.

Street Improvements.

1.

Street Right-of-Way, Driving Lane and Parking Widths. The following are the minimum widths permitted for street right-of-ways, driving lanes and parking:

Editor's note—

*  Lane widths are specified as exterior lane width first, then interior through lane and exclusive turn, third represents a two-way turn.

a.

A reduction of the right-of-way width to not less than fifty (50) feet, where topography permits, or when the proposed street connects to or is the extension of an existing street having a right-of-way width less than the required minimum, when approved by the town council, may be permitted.

b.

The shoulder width on all streets shall be increased by two feet when guardrails are required by the town engineer.

c.

A ten (10) foot utility easement shall be provided on both sides of the right-of-way, unless reduced to one side by the town engineer and approved by the town.

d.

Traffic control signs and pavement marking shall be provided according to the Manual on Uniform Traffic Control Devices, as amended, at the developer's expense.

e.

The slope of the right-of-way outside of the driving and parking lanes shall not feature cuts or fill with slopes steeper than two to one.

2.

Surfacing. Surfacing for all town streets shall be as follows:

3.

Provision of Street Curbing. Provision of curbing on Naches streets shall be as follows:

a.

All present and future through streets shall be constructed with barrier curbs.

b.

Interior and dead-end residential streets may be constructed with rolled mountable curbs.

c.

The curb radii at all intersections and interior corners shall be constructed with barrier curbs from the property lines of the corner lots.

4.

Additional requirements for street design are also listed in Sections 16.12.090 to 16.12.150 and 16.12.170.

B.

Sidewalk Improvements. Sidewalks are required for all public streets within Naches as follows:

1.

Sidewalk Width. All sidewalks shall be a minimum of five feet in width.

2.

Sidewalk Surface. All sidewalks shall be constructed of cement concrete to a minimum depth of four inches, except at driveways and where rolled curbs are present, then the depth shall be six inches.

3.

Property owners and developers shall be responsible for replacing all cracked or damaged sidewalks in a timely fashion at no cost to the public.

C.

Domestic Water Distribution System.

1.

As stated in Section 16.12.110, a complete domestic water distribution system shall be installed to provide potable water to each lot within a development. This water distribution system shall be designed and constructed in accordance with the state Department of Health regulations and standard practices of the town.

2.

Water lines and mains should be located within the utility easement of the street right- of-way, the size of which shall be determined based on the estimated water usage (demand) and required fire flows.

D.

Sanitary Sewer System.

1.

As stated in Section 16.12.130, a complete sanitary sewer collection system with a separate connection to the town sewer system shall be provided to each lot or unit within a development. The sewer collection system must be designed and constructed in accordance with the state Department of Ecology regulations and the standards of the town.

2.

Sewer lines should be located within the utility easement of the street right-of-way; side sewers must be four-inch minimum lines (for residential development). Sewer mains shall be a minimum of eight-inches in diameter.

3.

The town may require a town approved back-flow device to be installed at the expense of the developer on the side sewer extension for each lot within the development.

E.

Storm Drainage-Storm Sewers.

1.

All subdivisions, commercial and industrial developments shall provide for drainage such that their development does not conflict with present drainage patterns, create a drainage problem within itself or for its neighbors. Most common short subdivisions (short plats) or smaller commercial and industrial developments are not anticipated to cause such conflicts; therefore they will be subject to the requirements of this subsection only when review of the proposed development by the town engineer reveals, in his or her opinion, that such conflicts exist or potentially exist. When the town engineer makes such determination, the developer shall conform to this subsection. Subdivisions shall comply with this subsection in all cases.

2.

A drainage plan, where required, shall be prepared by a professional engineer registered in the state and submitted to the town engineer for review and approval for any proposed land development that will increase the quantity of or in any way alter the drainage runoff occurring prior to development.

3.

Design calculations for peak flow and peak volume storage requirements shall be based on a design storm frequency of ten (10) years, unless it is determined by the town engineer that the development is located in a drainage problem area whereby the design storm frequency may be raised accordingly.

4.

The plan shall provide for the on-site detention and/or retention of the total water intercepted and collected by the development and the areas (improved and unimproved) lying and draining presently to and through the proposed development, for the design storm, unless other natural or man-made systems are available for use.

5.

Detention and/or retention of storm-water runoff from any proposed land development shall be accomplished by stormwater holding facilities, either open or closed, or by introduction, on-site, of stormwater into the permeable soils via an infiltration system.

6.

The drainage plan shall incorporate all calculations of the determination of the required size of the systems.

7.

The overflow of runoff in excess of the design storm quantities must be situated or directed to where it would have overflowed under the conditions existing prior to the proposed development. The capacity of the drainage course downstream of the development may be required to be evaluated. The submitted drainage plan shall incorporate, among other data, a topographical map to clearly define:

a.

The proposed development;

b.

All areas, improved and unimproved, lying upstream and draining to and across the proposed development; and

c.

Drainage courses, natural or otherwise, to which the proposed development will drain.

Said plans shall include a plan profile of the systems including cross-sections of all open ditches and channels. Hydraulic and physical data such as grades, bottom elevation of ditches and channels, inverts of pipes at all structures, such as manholes and catch basins, size and length of all pipes; lengths of ditches and channels, and top elevation of all catch basin covers shall be called out. This includes the invert elevations of the existing or other proposed storm drainage systems that the subject drainage plan proposes to tie into.

F.

Underground Utilities. All underground utilities in all new residential areas shall be installed and maintained at a depth of not less than three feet below the graded surface of said way or street; provided, existing installations may be maintained at the present level until replaced.

G.

Improvement Plans. Improvement plans shall comply with town standard plans.
The plans shall be done under the direction of a professional engineer (design engineer) registered in the state of Washington and shall bear the engineer's stamp and signature. All improvement plans shall be reviewed and approved by the town engineer or the town engineer's representative and shall be stamped "approved" prior to issuance of a construction permit. Any changes to approved plans that result during construction shall be shown on as constructed or as built plans provided by the developer and marked "As Built" or "As Constructed" by the design engineer.

(Ord. 496 §§ 9—9.7, 1999: Ord. 462 §§ 9—9.7, 1998)

16.12.170 - Public facilities development procedures—Underground utilities.

A.

Financing of Installations. The developer shall make all arrangements for the installation of underground utilities with the appropriate agency or utility. The costs of constructing the new facilities shall be the responsibility of the developer.

B.

Covenant for Future Installations. Development covenants and final plats shall contain a provision that all future utility facilities shall be placed underground.

(Ord. 496 § 10, 1999: Ord. 462 § 10, 1998)