The Detweiller Report: A Look Back In Course Measurement

Appendix: Measurement Data

Steel Taping data

COURSE LENGTH (measured by steel tape* )

Shortest Route

Course is 4788.88 m or 2.975 mi from marked start to finish line (see diagram or 128'5" / 39.15 m short of 3 miles if run on shortest route.

Center of Course

Course is 4864.24 m or 3.022 mi from marked start to finish line (see diagram)

or 118' 10"/ 36.21 m longer than 3 miles if run on center line of course

MILE MARKS

Shortest Route

The first mile is (and should be relocated to) 34' beyond the 1^st mile pipe (current course if run on the shortest route is 34' short of a mile at that pipe)

The second mile is (and should be relocated to) 92'5" beyond the 2^nd mile pipe

(current course if run on the shortest route is 92'5" short of 2 miles at that pipe)

Center of Course

The first mile, if run on center line, is 24'4'' short of 1^st mile pipe (current course if run on center route is 24'4" longer than a mile at that pipe)

The second mile, if run on center line, is 85' short of 2^nd mile pipe (current course if run on center route is 85' longer than 2 miles at that pipe)

* using ON COURSE RATING SYSTEMS:registered:, OCRS, (patent pending) standardized course measurement method. Seewww.oncourseratingsystems.com

Calibrated Bicycle Measurement Data

Other Measurement Data:

Length of other historical courses

(calibrated bicycle method- compiled from loop length data)

Effect of the changes in the 3 mile course, from 2002 to 2007

(USATF line)