The reach to county cross reference table (one to many relationship).
| Field Name | Field Description | Data Type | Field Size* | RRN | The 1:250,000 scale EPA River Reach number, cross reference to Reach table. Obsolete field. | varchar | 16 | CountyID | The county ID, foreign key to table County | smallint | 2 |
*The text datatype pre-allocates only 16 bytes. Size represents actual bytes for all other data types.