A. After the preliminary plat is approved, the subdivider shall have an improvement plan for the subdivision prepared by a registered civil engineer. Two (2) copies of the improvement plan shall be filed with the county engineer. This plan shall include the following:
1. The subdivision name and number, geographic grid (township, range and tier, section number and location within the section), north arrow, date and scale no smaller than one hundred feet to the inch (1" = 100').
2. The plan and profile of all proposed roads showing final grades and cross sections of roads in accord with the requirements contained in title 2 of this code.
3. The plan and profile of proposed sanitary and stormwater systems with grades and sizes indicated. Drain calculations may be required.
4. A grading plan, showing stormwater drainage for each lot.
5. Any other improvements such as curbs, gutters, sidewalks, bridges, lift stations, fire hydrants, streetlighting, etc., as required, and in accord with the requirements contained in title 2 of this code.
B. The county engineer, or his representative, shall check inspection reports of the applicant's engineer and shall perform a final inspection and additional inspections (if called for). Construction and inspection of road improvements shall be completed in accord with the requirements contained in title 2 of this code or appendix A of this title.
C. In lieu of completing all improvements as required before final plat recording, the subdivider shall enter into a surety agreement with the board agreeing to complete the improvements in accordance with surety agreement conditions and preliminary and final plat approvals. A cash deposit, certificate of deposit, corporate surety bond written by an insurance company licensed in Idaho having a rating from AM Best & Company of "A" or better, letter of credit issued and backed by a federal or state chartered bank, is required equivalent to one hundred fifty percent (150%) of the project engineer's estimated cost of construction of the improvements for the purpose of guaranteeing completion of the work and repair of any defects in improvements which occur within one year of the first acceptance of the completed work by the board. Sureties guaranteeing the work and repair of any defects in improvements which occur within one year after first acceptance of the completed work by the board may be reduced by the board by one-half (1/2) for that one year. The surety agreement shall be valid for a period not to exceed two (2) calendar years from the date of approval. At any time prior to the expiration date of the surety agreement, the subdivider may make a written request to the planning director for a single extension of the surety agreement for a period up to two (2) years. The board may consider such request for extension at any regular business meeting. The extension request must be approved or denied by the board prior to the expiration date of the surety agreement. (Ord. 501, 11-18-2008)