All improvements shall be designed and constructed in conformance with the development standards contained in this article, as well as Chapter 18.30 JCC and any standards incorporated therein. Prior to construction of any improvements, as approved upon the preliminary plat or binding site plan, the subdivider shall furnish construction plans. These plans must be prepared, signed, dated and stamped by a Washington State licensed civil engineer and shall be in accordance with the standards contained in Chapter 18.30 JCC. The construction plans must be reviewed and approved by the county prior to construction.
(Ord. 8-06 § 1; Ord. 9-24 § 3 (App. A (Exh. 2)))
(1) 
Transportation Standards – Generally. All divisions of land covered by this chapter shall be served by appropriate transportation facilities, including roads and facilities for transit, pedestrians, and bicycles. Transportation facilities shall be adequate both the serve the division of land and to avoid adverse effects to the existing transportation system. If transportation facilities are inadequate, the applicant shall be required to make provision for all necessary improvements. Transportation facilities shall be deemed adequate if necessary improvements are planned and designated funding is secured in the Six-Year Transportation Improvement Program.
(2) 
Road and Drainage Design and Construction Standards.
(a) 
All roads serving two or more lots shall comply with the road design and construction standards specified in JCC § 18.30.080;
(b) 
A drainage analysis shall be performed in conformance with JCC § 18.30.070, and drainage systems shall be designed to the standards set forth in JCC § 18.30.060(2) and § 18.30.070.
(Ord. 8-06 § 1; Ord. 9-24 § 3 (App. A (Exh. 2)))
Where reasonably necessary to mitigate the direct impacts of the proposed division of land and/or to meet safety requirements, off-site road improvements may be required as a condition of approval under this chapter. When required, the applicant shall bear the sole responsibility to make such off-site road improvements.
(Ord. 8-06 § 1; Ord. 9-24 § 3 (App. A (Exh. 2)))
The following health standards apply to all divisions of land governed by this chapter:
(1) 
Water. All divisions of land shall comply with the requirements established by the Jefferson County department of health for the provision of water;
(2) 
Wastewater Disposal. All divisions of land shall comply with the requirements established by the Jefferson County department of health for wastewater disposal; and
(3) 
Storm Drainage. Stormwater flows from land divisions shall not adversely affect critical aquifer recharge areas. All divisions of land shall meet the regulations for critical aquifer recharge areas contained in Article VI-E of Chapter 18.15 JCC.
(Ord. 8-06 § 1; Ord. 9-24 § 3 (App. A (Exh. 2)))
All divisions of land governed by this chapter shall meet the fire protection and improvement standards adopted by Jefferson County.
(Ord. 8-06 § 1; Ord. 9-24 § 3 (App. A (Exh. 2)))
The department of community development and department of public works are responsible for reviewing all engineering drawings and for the supervision, inspection and acceptance of all subdivision improvements, and shall charge the subdivider the applicable fees as set forth in the Jefferson County fee ordinance.
(Ord. 8-06 § 1; Ord. 9-24 § 3 (App. A (Exh. 2)))
If an improvement bond or other guarantee has been submitted, such guarantee shall be released in accordance with the development standards contained in Chapter 18.30 JCC.
(Ord. 8-06 § 1; Ord. 9-24 § 3 (App. A (Exh. 2)))
The county may disapprove a proposed subdivision because of flood, inundation or regulated wetlands if the county finds that such condition poses a threat to the public health, safety or general welfare. Where any portion of the proposed subdivision lies within both a flood control zone, as specified by Chapter 86.16 RCW, and either the 100-year floodplain or the regulatory floodway, the county shall impose a condition on the preliminary plat requiring the subdivider to conform to the Federal Emergency Management Agency (FEMA) flood hazard requirements. In such cases, no development permit associated with the proposed subdivision shall be issued by the county until said FEMA requirements have been met. Where feasible, the county may require that all lots and/or building envelopes be located outside the 100-year floodplain. The county may also require dedication of land to any public body and/or the construction of improvements and may impose other conditions necessary to protect against flooding or inundation.
(Ord. 8-06 § 1; Ord. 9-24 § 3 (App. A (Exh. 2)))
The standards or requirements established in this chapter and Chapter 18.30 JCC are minimum requirements. These standards may be increased and additional requirements may be imposed for the purpose of mitigating identified probable significant adverse environmental impacts pursuant to the State Environmental Policy Act (SEPA), Chapter 43.21C RCW, as now established or hereafter amended. Such additional requirements may include, but are not limited to, off-site improvements to any public facility, the dedication and/or improvement of parks and open spaces, and contributions to any county fund established to finance the provision of public services required by subdivision.
(Ord. 8-06 § 1; Ord. 9-24 § 3 (App. A (Exh. 2)))
Preliminary plat approval must be granted for the entire subdivision and must delineate the separate divisions that are to be developed in phased increments. Where the preliminary plat approval is conditioned upon completion of the proposed phases in a particular sequence, the preliminary plat approval shall specify a completion date for each phase. Final plat approval may be granted for each separate phase of the preliminary plat. Any changes at the preliminary plat stage will require approval in accordance with JCC § 18.35.340.
(Ord. 8-06 § 1; Ord. 9-24 § 3 (App. A (Exh. 2)))