Each applicant for a building permit which proposes to expand an existing structure or construct a new building should be accompanied by a site plan that provides the information listed below.
The detail required in a site plan will vary, to some extent, with the size of the site and the proposed improvements. For example, elevation data for a single-family lot within a recently developed subdivision and for finished floor may be sufficient; whereas, an industrial or commercial site, covering several acres and adjacent to a major drainage way, may need to provide a detailed drainage plan so that the safety of the improvements and personnel on the site can be assured.
With the understanding that the detail from one site plan to the next may vary, the following the basic information should be provided:
1. A drawing (plat) of the property boundaries showing existing, on-site improvements and their relation to the tract's property lines;
2. An outline of the proposed improvements, distinguishable from existing improvements, with dimensions to adjacent property lines;
3. Where new water and/or sewer services are planned, the location and size of existing (if any) and proposed service connections**
4. Ground, street and floor elevation data adequate to determine that proposed improvements are not likely to be subject to flood damage; and
5. The location, width and type of construction of existing (if any) and proposed driveways - plus the distance to the adjacent street intersection, on corner properties, or existing driveways on adjoining parcels.
** In order for the customer to be assured of adequate service and correct tapping cost figures, he or she should be encouraged to provide as much information as possible concerning any special or atypical water service demands and/or wastewater discharge requirements.
The Engineering Dept. will provide copies of plats and other boundary information, when available, to builders and/or owners on request. But it will be up to the builder or owner to plot existing and proposed improvements thereon.
It may be necessary for the builder or owner to coordinate with the Director of Utilities on the location of exiting services. IT IS RECOMMENDED that they coordinate any PROPOSED connections.
The collection of field elevation data may be performed by the builder or surveyor on sites not affected by the 100-year floodplain. Such data may be based upon an assumed elevation datum, but should provide the following as a minimum: (1) Ground elevation at each property corner with intermediate ground elevations along all property lines greater than 100 feet in length (i.e., elevation points should not be more than 100 feet apart); (2) top of curb elevations at the points where projected side property lines would intersect the curb, or ditch flowline and street centerline elevations at similar locations; (3) proposed finished floor elevations; and (4) an elevation reference to a fixed object on the site (fire hydrant operating nut, manhole cover, etc.) If a site is traversed by a drainage swale or channel, ground elevation data adequate to define the drainage way should also be provided.
Field elevation data for sites adjacent to major drainage ways, especially those within the regulatory floodplain, should be collected by a registered surveyor - since a drainage study and/or elevation certificate may be required.
In either case, the site plan should indicate (1) how runoff from adjacent properties will be conveyed across the site in question, if applicable; and (2) how on-site drainage will be conveyed to off-site. For small lots, this may be accomplished by the use of flow direction arrows. For larger sites, existing and proposed grading (topography) may be called for.
For additional information regarding building permits, please contact the Terrell Chamber of Commerce or the city of Terrell at 201 E. Nash St. 972-551-6600