Airport Information

and More!

Airport Maps

The Watertown Regional Airport would like to share with you some maps of the airport. The following maps and images are for educational purposes only, please do not use them for actual navigation, airspacing, or any other design engineering function.

Part 77 Surfaces


Select the link to the Right->> General Overview

Airport Part 77 surfaces are HUGE, this general overview is a total of 70,000 feet from top to bottom and 40,000 feet from left to right. That covered the entire town of Watertown, SD.

Select the link to the Right->> Closer to the Airport with City Aerial image in background

Here you can see a little closer to the airport, with the city of Watertown, SD in the background. Along the right edge is Highway 81. On the left is Lake Kampeska. This map is a little over 45,000 feet from left to right.

Select the link to the Right->> Primary Surface

The Primary Surface is an imaginary surface drawn from one end of the runway to the other. The purpose of the Primary surface is multi-fold. 1). It creates the keystone on which most other airport surfaces are built, 2). Prevents structures from being built within it, to increase the safety of the runway.

Select the link to the Right->> Runway Protection Zone

The Runway Protection Zone is an area extending out from the end of the Primary Surface to a dimension determined by the type of approach to the runway. The purpose of the runway protection zone is to prevent structures being built to increase the safe landing of an aircraft that may land short of the runway.

Select the link to the Right->> Runway Safety Area

The Runway Safety Area is similar to the Runway Protection Zone in that one of its primary goals is to increase the safe landing of an aircraft that could possibly run off the edge of the runway. The Runway Safety Area is also very similar to the Primary Surface.

Select the link to the Right->> Obstacle Free Area

Serves a similar function to the Runway Safety Area.

Select the link to the Right->> Approach Surface

The Approach Surface varies depending on the type of approach to the runway. At Watertown, each approach surface is 10,000 feet long, with the exception of the south approach surface which is a total of 50,000 feet long.

Select the link to the Right->> Transitional Surface

The Transitional Surface is a surface that extends from the Primary surface at a 7 to 1 angle. The purpose is to ensure that no objects are in the area of an aircraft landing or navigating the airport.

Select the link to the Right->> 100 to 1 Slope

The 100 to 1 slope surface is perhaps the surface that affects the most people. It is a circular shape with a radius of 20,000 feet. The general idea is that any planned development that exceeds a slope of 100 to 1 from the airport requires FAA form 7460-1 to be completed and approved before construction can be started. There are some exceptions to this rule, but generally any construction over 200 feet requires FAA 7460-1 to be completed.

Planed Development


Select the link to the Right->> DreamScape

The DreamScape is a continuously updated image of wishful thinking at the airport. It may or may not be what actually is built.

Google Earth Layer Maps


Select the link to the Right->> Updated City Overlay

This is a .kmz simple base layer map for use with Google Earth. It will replace the default Google Map for the area around the Watertown Regional Airport. Once it is added to the Google Earth Application it can be hidden or turned on as you would like.

Select the link to the Right->> Complete Airspace Package

This is a .kmz file that will install every airspacing zone around the Watertown Regional Airport.


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