1. Site plan
The plat map
A plat map is the first step in development of a site plan.
It delineates property lines with bearings, dimensions, streets, and existing easements.
Drawing a plat map:
Start at the point of beginning (POB).
Delineate first lot line in the North-East quadrant with given dimension,
Delineate remaining lot lines sequentially with their bearings and dimensions,
Close at the POB.

3. Site plan Topography map
It is a plat map indicating grades, elevations, and contours at site.
Contours are lines of equal elevation above the same reference plane. The datum plane is usually referred to and located at mean sea level. A contour interval is the vertical distance between contours. Common intervals are 1, 2, and 5 feet.

5. Site plan
Grade is the percentage of rise or fall of a plane per 100 feet. A concept of grading design is essential in developing the physical form of a site. It is essential for positive drainage that allows storm water runoff to flow away from buildings and activity areas. Contours are usually illustrated using broken lines.
A topography map is required to study the slope conditions, which may influence the design process. Slope is the ratio of horizontal to vertical dimensions of a plane.
A grading plan is prepared using a topography map.

6. Site plan
 Cut and fill
Contours may have to be modified for proper site development. A cut is indicated when a proposed contour is moved back into an existing slope; a fill is indicated when a proposed contour is moved away from an existing slope. The purpose of providing cut and fill drawings is to determine the total quantity of earth required to be added for site development or material required to be carried away from the site.

7. Site plan Setting grades for positive drainage Establishing contours
G = (d/L)*100, where G = % of grade, d = difference in elevation, and L = horizontal length between two points in a site.
Establishing contours
D = (CI/G)*100, where D = distance between contours at a particular grade and contour interval, G = % of grade, and CI = contour interval.

10. Site plan Site drainage
The design of a drainage system is based on the amount of rainfall to be carried away from the site at a given time. Following formula is used for the calculation of runoff:
Q = CIA, where Q = storm water runoff from an area in cubic feet per second (cfs), C = runoff coefficient (measure of the characteristics of a surface that permits water to flow from it), I = average intensity of rainfall in inches per hour, and A = site area in acres (1 acre = sq. ft.). This formula can be used for areas less than 5 square miles.

11. Site plan Site drainage Subsurface drainage:
The basic objectives of the subsurface systems are collection, transfer, and disposal of surface runoff. Since water always runs downhill and perpendicular to the contour line, it may be necessary to revise the site contours for easy removal of surface water.
Collection of surface runoff is done by area drains, catch basins, and trench drains.
Once the water is collected, it is carried by storm sewers and disposed of in streams or rivers. Infiltration of storm water into sanitary sewers should be avoided as far as possible.

12. Site plan Guidelines for surface drainage: Subsurface runoff
Runoff should not create a problem on another property.
A method of reducing the velocity of surface runoff should always be considered so that it might be absorbed in the soil.
A drainage plan and grading should be so devised as to take advantage of the existing natural systems.
Subsurface runoff
Subsurface runoff is the secondary method of removal of water from a site. This process allows the water to permeate the surface, be absorbed by the soil, and eventually become part of the groundwater.

13. Site plan Evaporation and transpiration Delay runoff
A third method by which water is removed from a site is evaporation and transpiration. Evaporation may be achieved by allowing plenty of sunlight to reach the site; planned vegetation helps remove the water by transpiration.
Delay runoff
Storm water is directed to a basin at its source of runoff. This method, known as delayed runoff, can be used to control storm water from individual lots. Like surface runoff, it helps to reduce the size of storm sewers and to recharge groundwater.

14. Site plan Site improvement plan
Site lot lines with bearings and dimensions,
Scale of the drawing,
North arrows,
Building location with dimensions,
Paving, walks, parking areas, walls with their accompanying material call-outs, and layout dimensions.