(A) General. Prior to issuance of a watershed development permit, the following information shall be submitted to the city for review and approval. The applicant shall also file a "Site Plan Fair Notice" or similar form promulgated and in use by the City of Sunset Valley at the time the applicant files the application or request for a permit under this chapter.
(B) Standard preliminary requirements.
(1) Preliminary site plan submittals shall include the following:
(a) Six copies of a preliminary site plan showing the following information shall be submitted with the development permit application.
(b) Legal description of the property;
(c) Name and address of the owner/developer;
(d) Name and address of the company or individual who prepared the site plan;
(e) A topographic map with two-foot contours based upon City of Austin data showing;
1. Location of all classified waterways showing the limits of each classification;
2. The horizontal limits and elevations of the 100 and 25-year floodplains with a citation of the source of the information;
3. Locations of the Critical Water Quality Zone (CWQZ) and the Water Quality Transition Zone (WQTZ);
4. Location of trees having a trunk with a four-inch diameter or greater as measured 4% feet above the ground;
5. Existing geologic features including but not limited to faults and fractures along waterways and other critical environmental features (CEF) as defined herein;
6. Location of all proposed improvements including buildings, streets, driveways, storm drainage systems, water supply and distribution systems, wastewater collection systems or wastewater treatment and disposal systems;
7. Location of all temporary erosion/sedimentation controls and permanent water quality controls;
(f) Location of the city limits line, the outer boundary of the city's extraterritorial jurisdiction, and the boundaries of the zoning districts, both on the subject property and on adjacent properties;
(g) Tabulations for the entire site and each individual lot showing total area of the site or lot, area of the CWQZ, area of the WQTZ, area of the 25-year floodplain, net site area, allowable impervious cover, impervious cover transfers, area of proposed impervious cover separated into buildings, streets, driveways, parking lots, sidewalks, and other impervious cover as appropriate; and
(h) With respect to any fill proposed to be deposited, the identity of the source of any fill material to be deposited, and the certification of the owner of such fill that same does not contain any hazardous or toxic substances or materials.
(j) Other information as the city may reasonably require.
(2) A map or maps showing soil map units, surface and subsurface geology, faults, sinkholes and other geologic units. Maps may be based on compiled data available from the Soil Conservation Service, U.T. Bureau of Economic Geology, City of Austin Environmental Resource Management Department and U.S. Geological Survey, and shall be complimented by an on-site geological survey conducted by a professional geologist.
(3) A report that includes the following:
(a) A description of existing topography of the site;
(b) A description of the geologic, soil, and vegetation characteristics of the site;
(c) A general description of the proposed changes to the site;
(d) A general description of the temporary measures to be utilized for the control of erosion/sedimentation during construction;
(e) General sequencing of construction;
(f) A description of the proposed permanent water quality controls and the basis of design;
(g) A description of the methods proposed for site restoration;
(h) An analysis of the impact of the development project on sedimentation in creek bottoms, on ground and surface water quality, on the quantity and quality of recharge, and the extent to which the proposed project will alter natural drainage patterns and the impact of any such changes; and
(i) A traffic impact analysis, if required as a condition of approval of the preliminary site plan.
(4) Preliminary landscape plan prepared in compliance with the requirements of the landscape provisions of this Code.
(C) The preliminary site plan submittal shall be approved if the City Council finds that the proposed development as specified in the preliminary site plan submittal is in compliance with all applicable provisions of this Code and any other ordinance or City Code.
(D) Standard final site requirements. Within six months of approval of the preliminary site plan, a final site plan shall be submitted. A preliminary site plan shall expire if a final site plan is not submitted within this time frame. A final site plan shall contain the following information:
(1) Detailed construction plans bearing the seal and signature of a professional engineer, containing the following information.
(a) Cover sheet with appropriate signature block;
(b) General construction notes;
(c) Final grading plans where appropriate drawn at a scale of one inch equals 50 feet (max.);
(d) Plans and profiles for streets, storm sewers, drainage channels, wastewater lines, water lines 12 inches in diameter and larger, water quality control facilities, driveways, curbcuts and access points to public streets, alleys and rights of way drawn at a scale of one inch equals 50 feet (max.) horizontal and one inch equals five feet (max.) vertically;
(e) Construction details and typical sections;
(f) Temporary erosion/sedimentation control plans drawn at a scale of one inch equals 100 feet (max.) and appropriate details;
(g) Tree protection plan drawn at a scale of one inch equals 100 feet (max.) and appropriate details; and
(h) Final restoration plan drawn at a scale of one inch equals 100 feet (max.) including any appropriate specifications, details, and application rates for seeding, fertilizing, and mulching.
(i) Any change or deviation from the preliminary site plan submittal for the affected property.
(2) Engineering design report bearing the seal and signature of a professional engineer certifying to the accuracy and completeness of the report containing the following information:
(a) Description of the basis for design of each element of the project;
(b) Detailed design calculations in conformance with the provisions of this chapter on "standards and specifications" and other referenced design manuals;
(c) Printouts of computer models used in the design of the proposed improvements;
(d) Subsurface investigation reports where appropriate to justify basis of design;
(e) Traffic Impact Analysis if required as a condition of the approval of the preliminary site plan;
(f) Itemized estimated cost of all proposed improvements.
(g) Such other information as the city may reasonably require; and
(h) The signature of the owner of the property to be developed and, if someone other than the owner, the developer of the project.
(3) Final landscape plan.
(E) The final site plan shall be approved and a watershed development permit shall be issued if the City Council finds that the proposed development as specified in the final site plan is in compliance with all applicable provisions of this Code and any other ordinance or City Code. Any site plan approval, watershed development permit, and any variance approved in connection therewith shall expire 18 months after the issuance or approval thereof if construction of the project or improvement that is the subject of such site plan, watershed development permit, or variance has not then been commenced.