A. Funding mechanisms: The costs of expanding the City sewer collection system shall be financed and paid for by one or more of the following:
1. The Sewer Capitalization Fund as authorized by the City Council;
2. The creation of a local improvement district as provided by Idaho Code Title 50, Chapter 17; or
3. The property owners specifically benefitted by the construction of the sewer system expansion.
B. Lift Stations:
1. Designation of Lift Stations: The Public Works Director shall designate a lift station as temporary, regional, or sub-regional consistent with the most recent version of the Collection System Master Plan. The Public Works Director may, upon request when special circumstances exist and verified by a sewer technical memorandum to amend the Collection System Master Plan, change the designation of a lift station. If a developer requests the change in designation, the developer shall bear the cost of the sewer technical memorandum.
2. Installation of Temporary Lift Stations: Temporary lift stations may only be installed if the installation is approved by the Public Works Director. The party installing the temporary lift station shall be responsible for all construction and engineering costs and shall ensure that the temporary lift station is completed in accordance with City’ s sewer design and construction policies. Ownership, maintenance and operation of the temporary lift station shall transfer to City at the time the temporary lift station is accepted as operational by the City Council.
3. All lift stations shall be on property dedicated to the City. Temporary lift stations may have a reversionary clause to return the property to the original owner at the time the lift station is removed.
C. Expansion of the System and Reimbursement Eligibility:
1. Construction: A user may, with prior approval of the City, finance and construct an expansion to the sewer system, if the expansion is designed and constructed in accordance with City standards.
2. Eligibility Requirements: The developer has the potential to be reimbursed, as outlined below, for the cost of the sewer benefiting the developer’ s and other property by entering into a written agreement with the City, if any of the following apply:
a. The expansion is off-site and provides sewer service to other property (sewer mains along any frontage or on-site are not considered off-site) and was required to be over-sized or over-depth to serve other properties;
b. The expansion is onsite or on the frontage and is gravity sewer required by the most recent version of the Collection System Master Plan to be larger than twelve inches (12") in diameter to serve upstream properties outside of the development;
c. The expansion is onsite or on the frontage and is gravity sewer required by the most recent version of the Collection System Master Plan to be deeper than fifteen feet (15') to serve upstream properties. Depth for each segment is measured as the average depth between manholes measured in 25 foot increments measured from the finished grade to the invert of the pipe. Developer’s engineer shall provide a spreadsheet with each sewer segment that summarizes the depth at the increments and average depth per segment.
d. The expansion is a regional permanent lift station.
e. The expansion is a sub-regional or temporary lift station which the City has required to be oversized in order to accommodate an area larger than the developer’s property. This item also includes force mains that are required to be oversized to accommodate a larger area than the developer’s property.
3. Application Requirements: To be eligible for reimbursement, the user must, unless otherwise approved by the Public Works Director, do the following:
a. Meet eligibility requirements in C.2. of this section.
b. Submit a reimbursement application for sewer collection system expansion. This application shall be submitted prior to preliminary plat approval. Details will be listed in the Construction Improvement Agreement and Master Development Agreement. Applications received after preliminary plat submittal shall not be considered. For development that does not require subdivision, the application shall be submitted at the time of site plan submittal to be considered;
c. Design the sewer facilities in accordance with the most recent version of the Collection System Master Plan and Idaho Department of Environmental Quality (IDEQ) requirements and receive both City and IDEQ approval of the sewer construction plans and specifications;
d. Construct sewers in accordance with the approved plans and specifications and in accordance with the City of Hayden quality control and project certification standards;
e. Adhere to procurement requirements set forth in Idaho Code 67-2805; and
f. For lift stations, the design/construction engineer shall be selected by the developer from the City’s pre-qualified engineering services roster, current at the time of submittal. The City will act as the contracting agency.
g. The developer may choose any civil engineer licensed in Idaho for on and off-site sewer main design and construction engineering. The developer will act as the contracting agency.
D. Amount of Reimbursement:
1. Off-site gravity extensions serving already developed areas: When the expansion is upsizing of existing pipes or re-routing areas already served by City sewer, the amount of reimbursement owed to the developer for off-site sewer extensions shall be based upon actual construction costs. Engineering costs for gravity extensions serving already developed areas are not eligible for reimbursement.
2. Over-size or over-depth onsite gravity extensions and off-site gravity extensions: The amount of reimbursement owed to the developer “over sizing or over-depth” line extensions shall be determined by multiplying the percentages listed in the tables below, by the actual construction costs for the various pipe sizes and depths required for the project. Sewer mains (onsite, frontage, or offsite) that are not required to be oversized or deeper to serve others in areas that do not meet the requirements of D.1. are ineligible for reimbursement.
3. Off-site gravity extensions that are neither over-size, over-depth, nor serve already sewered areas are not eligible for reimbursement.
Pipe Depth (Feet) | Pipe Diameter (Inches) | ||||
12 | 15 | 18 | 21-27 | 30 | |
Pipe Depth (Feet) | Pipe Diameter (Inches) | ||||
12 | 15 | 18 | 21-27 | 30 | |
15 or less | 0% | 7% | 18% | 35% | 43% |
16 | 4% | 11% | 21% | 36% | 45% |
17 | 9% | 14% | 24% | 38% | 46% |
18 | 12% | 17% | 27% | 40% | 47% |
19 | 16% | 20% | 29% | 42% | 49% |
20 | 19% | 23% | 31% | 43% | 50% |
21 | 24% | 28% | 35% | 46% | 52% |
22 | 28% | 31% | 38% | 48% | 53% |
23 | 32% | 35% | 41% | 50% | 55% |
24 | 35% | 38% | 43% | 52% | 57% |
25 | 38% | 41% | 46% | 53% | 58% |
26 | 42% | 44% | 48% | 55% | 60% |
27 | 45% | 47% | 51% | 57% | 61% |
28 | 47% | 49% | 53% | 59% | 62% |
29 | 50% | 52% | 55% | 60% | 64% |
30 | 52% | 54% | 57% | 62% | 65% |
Manhole Depth (Feet) | Pipe Diameter (Inches) | ||
12 - 18 | 18 - 24 | 24 - 30 | |
15 or less | 0% | 42% | 60% |
> 15-20 | 16% | 53% | 68% |
> 20-30 | 38% | 65% | 72% |
4. Permanent Lift Stations: The amount of reimbursement owed for the construction of a permanent lift station shall be based upon actual construction costs approved by the City.
5. Sub-regional or Temporary Lift Station Oversizing: The amount of reimbursement owed for installation of an oversized temporary lift station or an oversized sub-regional lift station shall be determined by estimating the cost of constructing a lift station to serve only the development in accordance with the City’s sewer design policies, subtracted from the actual construction costs incurred by the developer. Force main reimbursement is limited to the additional cost of the pipe and fittings.
6. Engineering:
a. For regional permanent lift stations, the amount of reimbursement owed the developer for engineering shall be the actual engineering contract, as the City is the contracting agency. The developer shall give the City a retainer for which to pay the Engineer.
b. Engineering costs for sewer gravity mains, force mains, sub-regional lift stations, or temporary lift stations are not reimbursable.
E. Developer Agreements and Methods of Reimbursement:
1. A written agreement, not to exceed ten (10) years, shall be prepared which provides for reimbursement of the developer’s costs to provide regional sewer infrastructure. If justified and approved by the City Council, the agreement is eligible for (1) one extension of no more than five (5) years. The agreement will detail the timing of payment by the developer and the timing of reimbursement by the City. The agreement shall include one of the following reimbursement types, up to the reimbursement amount:
a. Within the Subject Development Only: The developer may choose to receive collection cap fee reimbursement within its development at the rate of 75% of the fees collected until payment in full or until the agreement expires, whichever occurs first. Under this option, the developer does not receive any portion of capitalization fees paid by others outside the development within the service boundary.
b. Within the Service Boundary: The developer may choose to receive collection cap fee reimbursement within its development and within the service area of the constructed improvements at the rate of 50% of the collection cap fees collected until payment in full or until the agreement expires, whichever occurs first.
2. If an agreement already exists to commit a portion of collection capitalization fees within the basin of a lift station or within the benefited users of a sewer main, then the developer cannot recoup costs from those users until either the prior agreement has been fully reimbursed or the prior agreement expires. (Ord. 620, 4-27-2021)