For a full description of the route visit the cache page for the first in the series. Cache specific notes will be included on each page where required.
Count the number of vertical supports on both sides of the bridge, this is A
Count the number of horizontal planks on either end (not both ends), this is B
Use the following equation to calculate the coordinates:
N51 37.(B*2)(A/2)(A-A) W002 57.(A-1)(B+1)(B+1)
Cache specific notes
Another Little Bridge here, once you've done the sums and found the cache continue along the footpath through Ponthir Woods.
The Little Bridges series was started by Stanthews in 2009 to highlight small footbridges in remote parts of Wiltshire. Since then the series has been expanded by others all over the country and starting to spread fast. There is a stats listing, so you can see how many Little Bridges you have found, you can find it here:- https://littlebridgesseries.wordpress.com/ . If you would like to add to the series, please go to the stats web site/Get Involved and click Number Request. To qualify, the bridge must be a foot bridge too small for vehicles, please make sure your title exactly matches “Little Bridges # xxxx then the name” including spaces so it will get picked up and added to stats list.