During the project development process, cultural resource professionals must evaluate whether there are any resources within the project area that are eligible for the National Register of Historic Places. These professionals must then evaluate what "effects" the project will have on those historic resources.

First, an assessment is made to determine if the resource is at least 50 years in age. Once this has been done, an evaluation is conducted to determine if the resource is eligible for the National Register of Historic Places (

1. association with events that have made a significant contribution to the broad patterns of our local, state, or national history;
   
2. association with the lives of persons significant in our past;
   
3. embodiment of distinctive characteristics of a type, period, or method of construction, or that represent the work of a master, or that possess high artistic values, or that represent a significant and distinguishable entity whose components may lack individual distinction; and
   
4. ability to yield, or likely to yield, information important in prehistory or history.
   

And finally, an assessment is made to determine the "effect" the proposed project may have on the resource:

• Effect;
  
• No Effect;
  
• Adverse Effect; or
  
• No Adverse Effect
  

For the Woodhaven Road Project, historic preservation specialists investigated 140 properties in the project area and documented their findings in a Historic Structures Survey/Determination of Eligibility Report Addendum. Completed in March 2002, the report evaluates the properties for their eligibility for inclusion in the NRHP. As a result of the findings listed in the historic structures survey report and addendum, the Pennsylvania Historical and Museum Commission concurred that 11 properties in the project area are eligible for listing on the NRHP.

As part of this project's environmental planning process, all information pertaining to resources that are cataloged either as National Register eligible or listed have been placed on the Environmental Features Map to give a final determination of the possible impacts each alternative might have on the region's cultural resources.