Surveying the Riparian Tract-Some Considerations by admin | Jul 7, 2022 | Field Notes | 0 comments Surveying the Riparian Tract-Some Considerations Presented by the Missouri Society of Professional Surveyors and Dr. Dick Elgin, PS, PE. Virtual attendance. June 15th, 2022 – 9 am-12pm. Approved for 3 PDU’s.