§ 154-146. Contents of plans and specifications.

(a)

General layout. The general plans for sewers shall include a suitable title and name of the project, subdivision or institution; its location; district, land lot and unit and intended use; the scale in feet; a graphical scale; the north point; the date; the name and signature of the party designing the system and the imprint of the party's professional seal, certificate number or registration number.

(1)

Scale and size. General layout and profile scales and structural and/or architectural drawing scales shall be distinguished. The scale for general plans should not be less than 20 feet and/or greater than 100 feet to the inch.

(2)

Notations. The lettering and figures on the plans should be of appropriate size of distinct outline. Surface elevations should be placed preferably just outside street lines opposite their respective position. The benchmark used should be indicated. For large sets of drawings, an index to the sheets and sections shall be provided on or near the cover sheet.

(b)

Geological features. Existing or proposed streets and all stream or water surfaces shall be clearly shown. The elevation of all proposed sewer inverts shall be clearly and distinctly written close to the manhole, parallel with the sewer line, and expressed to the nearest 0.01 foot. All elevations used will be based on USC&GS benchmark datum.

(c)

Existing facilities. The following existing facilities shall be indicated:

(1)

Sewers. The location, type, size, length, slope and direction of flow of all existing sewers shall be indicated sufficiently so that adaptability to the proposed system and future expansion may be readily elevated.

(2)

Water supplies and facilities. The location of water supplies, water treatment plants, reservoirs or other structures, existing and proposed, will be indicated.

(d)

Proposed facilities. The following proposed facilities shall be indicated:

(1)

Sewers. The location of all proposed sewers, with the size, pipe, type, class, grade, length and direction of flow, shall be indicated. Some numbering and/or lettering system shall be used to distinguish the manholes on the layout and the profile for adequate identification.

(2)

Detailed plans.

a.

Generally. White prints with black or blue lines are acceptable. Drawings must be legible, with scales as indicated in subsection (a) of this section. For modifications or extensions to an existing system or pumping station, the drawings should distinguish clearly the new facilities from the existing facilities and clearly indicate the connection and relation thereto.

b.

Sewers. Detail plans for sewers should show the following:

1.

Plan and profile. Show plan and profile drawing along the route of all sewers to be constructed. The plan and profile should indicate all special features such as inverted siphons, extra-strength pipe, concrete encasements and sewer bridges. All stream crossings and sewer outlets should be shown on the profiles, including the elevations of the streambed and the normal and 100-year highwater levels. Horizontal scale of profiles should be limited to not more than 50 feet to the inch and vertical scales be limited to not more than ten feet to the inch. Indicate both scales clearly on the profile. All known structures both above and below ground which might interfere with the proposed system should be shown, particularly such items as gas mains, water mains, storm drains and nature of street surfacing. Where work proposed is of a minor nature, profiles may be omitted at the option of the commissioner.

2.

Details. Distinguishing numbers and/or letters for manhole identification, size of sewer, surface and sewer invert elevations at structures and distance and grade of all sewers between the adjacent structures will be shown on the profiles. Both invert and structure top elevation will be shown. Plans must show location and surface elevations of developed abutting buildings except where otherwise noted on plans.

3.

Appurtenances. Include details of all appurtenances such as standard manholes, drop manholes and inverted siphons, as well as of all special appurtenances and structures such as regulators, floodgates and sewer bridges. These detailed plans should be drawn to such a scale as will indicate clearly the nature of the design of each of the structures and its equipment. Dimensions, elevations, capacities and explanatory notes should be appropriately marked so as to make details of the appurtenances readily intelligible.

4.

Cross sections. Detailed plans shall be included for all sewer or grading cross sections. Details of cradling and encasement shall be included.

5.

Flooding. The elevation of the 100-year flood high water will be indicated on the general plan and on the profile of sewers located within floodprone areas. Sewers will not be permitted in floodplain areas without special provisions.

6.

Test borings. Location and logs of test borings or seismic studies for determination of soil conditions, when required, will be shown on the plans.

(3)

Final (as-built) plan.

a.

Contents. The final sewer plat required under this section shall consist of a revised and corrected plan and profile in a Mylar-reproducible format containing the information outlined in this section with the further provision that the final plat shall reflect as-built locations of facilities determined by review or resurvey after construction and shall be tied to the state plans coordinate system. The size of the plans will be 23 inches by 36 inches. All drawing sheets in a set for a proposed project shall be of the same size.

b.

Certificate. The final sewer plat will also contain a certificate signed by the licensed professional engineer responsible for the design containing essentially the following statement:

"I certify that the data reflected on this drawing has been verified in the field and to the best of my knowledge is accurate and correct and in general compliance with existing rules and regulations governing development of sanitary or storm sewers in the City of Atlanta.

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Signature (Seal)"

(Code 1977, § 9-3131)