Section 20.03.04.015 - ENCROACHMENT STANDARDS01.Single-Family and Two-Family Docks. The following parameters govern the size and dimensions of single-family docks and two-family docks. a. No part of the structure waterward of the natural or ordinary high water mark or artificial high water mark may exceed ten (10) feet in width, excluding the slip cut out.b. Total surface decking area waterward of the natural or ordinary or artificial high water mark may not exceed seven hundred (700) square feet, including approach ramp and walkway for a single-family dock and may not exceed one thousand one hundred (1,100) square feet, including approach ramp and walkway for a two-family dock.c. No portion of the docking facility may extend beyond the line of navigability. Shorter docks are encouraged whenever practical and new docks normally will be installed within the waterward extent of existing docks or the line of navigability.d. A variance to the standards in this Subsection 015.01 may be approved by the Department when justified by site specific considerations, such as the distance to the established line of navigability.02.Community Docks.a. A community dock is considered a commercial navigational aid for purposes of processing the application.b. No part of the structure waterward of the natural or ordinary high water mark or artificial high water mark may exceed ten (10) feet in width except breakwaters when justified by site specific conditions and approved by the Department.c. A community dock may not have less than fifty (50) feet combined shoreline frontage. Moorage facilities will be limited in size as a function of the length of shoreline dedicated to the community dock. The surface decking area of the community dock is limited to the product of the length of shoreline multiplied by seven (7) square feet per lineal feet or a minimum of seven hundred (700) square feet. However, the Department, at its discretion, may limit the ultimate size when evaluating the proposal and public trust values.d. If a breakwater will be incorporated into the structure of a dock, and a need for the breakwater can be demonstrated, the Department may allow the surface decking area to exceed the size limitations of Paragraph 015.02.c of these rules.e. A person with an existing community dock that desires to change the facility to a commercial marina must submit the following information to the Department: i. A new application for an encroachment permit.ii. Text and drawings that describe which moorage will be public and which moorage will be private.03.Commercial Marina.a. Commercial marinas must have a minimum of fifty percent (50%) of their moorage available for use by the general public on either a first come, first served basis for free or rent, or a rent or lease agreement for a period of time up to one (1) year. Moorage contracts may be renewed annually, so long as a renewal term does not exceed one (1) year. Moorage for use by the general public may not include conditions that result in a transfer of ownership of moorage or real property, or require membership in a club or organization.b. Commercial marinas that are converted to a community dock must conform to all the community dock standards, including frontage requirements and square footage restrictions. This change of use must be approved by the Department through a new encroachment permit prior to implementing the change.c. If local city or county ordinances governing parking requirements for marinas have not been adopted, commercial marinas must provide a minimum of upland vehicle parking equivalent to one (1) parking space per two (2) public watercraft or float home moorages. If private moorage is tied to specific parking spaces or designated parking areas, then one (1) parking space per one (1) private watercraft or float home moorage must be provided. In the event of conflict, the local ordinances prevail.d. If a commercial marina can be accessed from a road, marina customers must be allowed access via that road.e. Moorage that is not available for public use as described in Paragraph 015.03.a. of these rules is private moorage.f. When calculating the moorage percentage, the amount of public moorage is to be compared to the amount of private moorage. Commercial marinas with private float home moorage are required to provide either non-private float home moorage or two (2) public use boat moorages for every private float home moorage in addition to any other required public use boat moorages.g. When private moorage is permitted, the public moorage must be of similar size and quality as private moorage, except for float home moorage as provided in Paragraph 015.03.f.h. Commercial marinas with private moorage must form a condominium association, co-op, or other entity that owns and manages the marina, littoral rights, upland property sufficient to maintain and operate a marina, and private submerged land, if present. This entity is responsible for obtaining and maintaining an encroachment permit under these rules and a submerged lands lease under IDAPA 20.03.17, "Rules Governing Leases on State-Owned Submerged lands and Formerly Submerged Lands."i. Existing commercial marinas that desire to change their operations and convert some of their moorage to private use must keep at least fifty percent (50%) of their moorage available for use by the general public. This change in operations must be approved by the Department through a new encroachment permit prior to implementation of the change. The permit application must describe, in text and in drawings, which moorage will be public and which moorage will be private.04.Covered Slip.a. Covered slips, regardless of when constructed, may not have a temporary or permanent residential area.b. Slip covers should have colors that blend with the natural surroundings and are approved by the Department.c. Covered slips may not be supported by extra piling nor constructed with hard roofs.d. Slip covers with permanent roofs and up to three (3) walls may be maintained or replaced at their current size if they were previously permitted or if they were constructed prior to January 1, 1975. These structures may not be expanded nor converted to boat garages.e. Fabric covered slips must be constructed as canopies without sides unless the following standards are followed: i. At least two (2) feet of open space is left between the bottom of the cover and the dock or pier surface; andii. Fabric for canopy and sides will transmit at least seventy-five percent (75%) of the natural light.05.Boat Garage.a. Boat garages are considered nonnavigational encroachments.b. Applications for permits to construct new boat garages, expand the total square footage of the existing footprint, or raise the height will not be accepted unless the application is to support local emergency services.c. Existing permitted boat garages may be maintained or replaced with the current square footage of their existing footprint and height.d. Relocation of an existing boat garage will require a permit.06.Breakwaters. Breakwaters built upon the lake for use in aid of navigation will not be authorized below the level of normal low water without an extraordinary showing of need, provided, however that this does not apply to floating breakwaters secured by piling and used to protect private property from recurring wind, wave, or ice damage, or used to control traffic in busy areas of lakes. The breakwater must be designed to counter wave actions of known wave heights and wave lengths.07.Seawalls. Seawalls should be placed at or above the ordinary high water mark, or the artificial high water mark, if applicable. Seawalls are not an aid to navigation, and placement waterward of the ordinary or artificial high water mark will generally not be allowed.08.Riprap.a. Riprap used to stabilize shorelines will consist of rock that is appropriately sized to resist movement from anticipated wave heights or tractive forces of the water flow. The rock must be sound, dense, durable, and angular rock resistant to weathering and free of fines. The riprap must overlie a distinct filter layer which consists of sand, gravel, or nonwoven geotextile fabric. The riprap and filter layer must be keyed into the bed below the ordinary or artificial high water mark, as applicable. If the applicant wishes to install riprap with different standards, they must submit a design that is signed and stamped for construction purposes by a professional engineer registered in the state of Idaho.b. Riprap used to protect the base of a seawall or other vertical walls may not need to be keyed into the bed and may not require a filter layer, at the Department's discretion.09.Mooring Buoys. Buoys must be installed a minimum of thirty (30) feet away from littoral right lines of adjacent littoral owners. One (1) mooring buoy per littoral owner may be allowed.10.Float Homes.a. Applications for permits to construct new float homes, or to expand the total square footage of the existing footprint, will not be accepted.b. Applications for relocation of float homes within a lake or from one (1) lake to another are subject to the following requirements:i. Proof of ownership or long term lease of the uplands adjacent to the relocation site must be furnished to the Department.ii. The applicant must show that all wastes and waste water will be transported to shore disposal systems by a method approved by the Idaho Department of Environmental Quality or the appropriate local health authority. Applicant must either obtain a letter from the local sewer district stating that the district will serve the float home or demonstrate that sewage will be appropriately handled and treated. Applicant must also provide a statement from a professional plumber licensed in the state of Idaho that the plumbing was designed in accordance with IDAPA 24.39.20, "Rules Governing Plumbing," as incorporated by reference in Section 003 of these rules, installed properly, and has been pressure tested.c. Encroachment applications and approved local permits are required for replacement of, or adding another story to, a float home.d. All plumbing work on float homes must be done in accordance with IDAPA 24.29.20, "Rules Governing Plumbing" and IDAPA 29.39.10, "Rules of the Idaho Electrical Board," as incorporated by reference in Section 003 of these rules.e. All float homes in Idaho that connect with upland sewer or septic systems must implement the following standards by December 31, 2012: i. The holding tank with pump or grinder unit must be adequately sealed to prevent material from escaping and to prevent lake water from entering. The tank lid must have a gasket or seal, and the lid must be securely fastened at all times unless the system is being repaired or maintained. An audible overflow alarm must also be installed.ii. Grinders or solids handling pumps must be used to move sewage from the float home to the upland system.iii. If solids handling pumps are used, they must have a minimum two (2) inch interior diameter discharge, and the pipe to the shoreline must also have a minimum two (2) inch interior diameter. Connectors used on either end of this pipe may not significantly reduce the interior diameter.iv. The pipeline from the float home to the shoreline must be a continuous line with no mechanical connections. Check valves and manual shutoff valves must be installed at each end of the line. Butt fused HDPE, two hundred (200) psi black polyethylene pipe, or materials with similar properties must be used. The pipeline must contain sufficient slack to account for the maximum expected rise and fall of the lake or river level. The pipeline must be buried in the lakebed for freeze protection where it will be exposed during periods of low water. Pipelines on the bed of the lake must be appropriately located and anchored so they will not unduly interfere with navigation or other lake related uses.v. Manifolds below the ordinary, or artificial if applicable, high water mark that collect two (2) or more sewer lines and then route the discharge to the shore through a single pipe are not allowed. All float homes must have an individual sewer line from the float home to a facility on the shore.f. All float home permittees will have their float homes inspected by a professional plumber licensed in the state of Idaho by December 31, 2012. The inspection will be documented with a report prepared by the inspector. The report will document whether or not the float homes meet the standards in Paragraph 015.10.e. of these rules, and will be provided to the Department before the above date.g. A float home permittee must request an extension, and give cause for the extension, if their float home does not meet the standards in paragraph 015.01.e. of these rules by December 31, 2012. Extensions beyond December 31, 2016 will not be allowed. A permittee's failure to either request the extension, if needed, or to meet the December 31, 2016 deadline will be a violation subject to the provisions of Section 080 of these rules.h. Construction or remodel work on a float home that costs fifty percent (50%) or more of its assessed value will require an encroachment application and construction drawings stamped by an engineer licensed in the state of Idaho.11.Excavated or Dredged Channel.a. Excavating, dredging, or redredging channels require an encroachment permit and are processed in accordance with Section 030 of these rules.b. An excavated or dredged channel or basin to provide access to navigable waters must have a clear environmental, economic, or social benefit to the people of the state, and must not result in any appreciable environmental degradation. A channel or basin will not be approved if the cumulative effects of these features in the same navigable lake would be adverse to fisheries or water quality.c. Whenever practical, such channels or basins must be located to serve more than one (1) littoral owner or a commercial marina; provided, however, that no basin or channel will be approved that will provide access for watercraft to nonlittoral owners.12.ATONs. Aids to Navigation will conform to the requirements established by the United States Aid to Navigation system.13.General Encroachment Standards.a. Square Footage. The square footage limitations in Subsections 015.01 and 015.02 include all structures beyond the ordinary or artificial high water mark such as the approach, ramp, pier, dock, and all other floating or suspended structures that cover the lake surface, except for:i. Boat lifts as allowed pursuant to Paragraph 015.13.b.ii. Jet ski ramp, port, or lift as allowed pursuant to Paragraph 015.13.b.iv. Undecked portions of breakwaters.b. Boat Lifts and Jet Ski Lifts.i. Single-family docks are allowed a single boat lift and two (2) jet ski lifts, or two (2) boat lifts, without adding their footprint to the dock square footage. Additional lifts will require that fifty percent (50%) of the footprint of the largest lifts be included in the allowable square footage of the dock or pier as per Subsection 015.01.ii. Two-family docks are allowed two (2) boat lifts and four (4) jet ski lifts, or four (4) boat lifts, without adding their footprint to the dock square footage. Additional lifts will require that fifty percent (50%) of the footprint of the largest lifts be included in the allowable square footage of the dock or pier as per Subsection 015.01.iii. A boat lift or jet ski lift within lines drawn perpendicular from the shore to the outside dock edges will not require a separate permit if the lift is outside the ten (10) foot adjacent littoral owner setback, the lift does not extend beyond the line of navigability, and the lift does not count toward the square footage of the dock as outlined in Subparagraphs 015.13.b.i. and 015.13.b.ii. The permittee must send a revised permit drawing with the lift location as an application to the Department. If the lift meets the above conditions, the application will be approved as submitted. Future applications must include the lifts.iv. Community docks are allowed one (1) boat lift or two (2) jet ski lifts per moorage. Boat lifts placed outside of a slip must be oriented with the long axis parallel to the dock structure. Additional lifts will require that fifty percent (50%) of their footprint be included in the allowable square footage of the dock or pier as per Subsection 015.02.c. Angle from Shoreline. i. Where feasible, all docks, piers, or similar structures must be constructed so as to protrude as nearly as possible at right angles to the general shoreline, lessening the potential for infringement on adjacent littoral rights.ii. Where it is not feasible to place docks at right angles to the general shoreline, the Department will work with the applicant to review and approve the applicant's proposed configuration and location of the dock and the dock's angle from shore.d. Length of Community Docks and Commercial Navigational Encroachments. Docks, piers, or other works may extend to a length that will provide access to a water depth that will afford sufficient draft for water craft customarily in use on the particular body of water, except that no structure may extend beyond the normal accepted line of navigability established through use unless additional length is authorized by permit or order of the Director. If a normally accepted line of navigability has not been established through use, the Director may from time to time as he deems necessary, designate a line of navigability for the purpose of effective administration of these rules.e. Presumed Adverse Effect. It will be presumed, subject to rebuttal, that single-family and two-family navigational encroachments will have an adverse effect upon adjacent littoral rights if located closer than ten (10) feet from adjacent littoral right lines, and that commercial navigational encroachments, community docks or nonnavigational encroachments will have a like adverse effect upon adjacent littoral rights if located closer than twenty-five (25) feet to adjacent littoral right lines. Written consent of the adjacent littoral owner or owners will automatically rebut the presumption. All boat lifts and other structures attached to the encroachments are subject to the above presumptions of adverse affects.f. Weather Conditions. Encroachments and their building materials must be designed and installed to withstand normally anticipated weather conditions in the area. Docks, piers, and similar structures must be adequately secured to pilings or anchors to prevent displacement due to ice, wind, and waves. Flotation devices for docks, float homes, etc. must be reasonably resistant to puncture and other damage.g. Markers. If the Department determines that an encroachment is not of sufficient size to be readily seen or poses a hazard to navigation, the permit will specify that aids to navigation be used to clearly identify the potential hazard.h. Overhead Clearance. i. Overhead clearance between the natural or ordinary high water mark or the artificial high water mark, if there be one, and the structure or wires must be sufficient to pass the largest vessel that may reasonably be anticipated to use the subject waters in the vicinity of the encroachment. In no case will the clearance be required to exceed thirty (30) feet unless the Department determines after public hearing that it is in the overall public interest that the clearance be in excess of thirty (30) feet. Irrespective of height above the water, approval of structures or wires presenting a hazard for boating or other water related activities may be conditioned upon adequate safety marking to show clearance and otherwise to warn the public of the hazard. The Department will specify in the permit the amount of overhead clearance and markings required.ii. When the permit provides for overhead clearance or safety markings under Paragraph 015.13.h., the Department will consider the applicable requirements of the United States Coast Guard, the Idaho Transportation Department, the Idaho Public Utilities Commission and any other applicable federal, state, or local regulations.i. Beaded Foam Flotation. Beaded foam flotation must be completely encased in a manner that will maintain the structural integrity of the foam. The encasement must be resistant to the entry of rodents.14.Floating Toys.a. Encroachment permits are not required for floating toys, except where noted in Paragraph 015.14.b. Counties and cities may regulate floating toys for public safety and related concerns.b. A floating toy becomes a nonnavigational encroachment, and an encroachment permit is required, when one (1) of the following occurs:i. It is anchored to the bed of the lake with a device that requires equipment to remove it from the bed of the lake, or;ii. It is located waterward of the line of navigability for more than twenty-four (24) consecutive hours.15.Lake Specific Encroachment Permit Terms.a. The Department may use encroachment permit conditions specific to individual lakes if the permit conditions are needed to protect public trust values and the permit condition is approved by the Land Board.b. Lake specific encroachment permit conditions may supplement, negate, or alter encroachment standards established in Section 015 of these rules.c. Lake specific encroachment permit conditions will be used to assist with implementing lake management plans authorized by Title 39, Chapter 66, Idaho Code; Title 39, Chapter 85, Idaho Code; Title 67, Chapter 43, Idaho Code; and Title 70, Chapter 2, Idaho Code. The purpose for using such lake specific permit conditions is to address lake specific environmental concerns that require attention and create a need for a variance from what is allowed on other lakes.Idaho Admin. Code r. 20.03.04.015