Then usable tread depth is compared to remaining tread depth in order to calculate tread wear percentages. For example, a tire that started with 10/32 of original tread depth and has worn off 4/32 (down to 6/32 of remaining tread depth) is 50% worn.
1 If you know the census tract number: Use the IRS list of 2014 Qualified Census Tracts by county. 2  If you have a street address: Visit HUD's interactive QCT Map and enter the property address to view what Census Tract the property is located.
What is a PIN number? Each parcel of land on the GIS database is assigned a unique identification number. This number enables our department to index and store attribute information about each parcel. In Washington County, the PIN number is used in the GIS office, the Register of Deeds and the Tax Administration office. This allows a user to cross reference information about a parcel.