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 planks that make up the bridge (count the ambiguous plank near the middle as two, and don't forget the two end planks) this is AB.
Count the number of bars that are on one side of the bridge, this is C.
Checksum of A+B+C=10
Use the following equation to calculate the coordinates:
N51 37.(AxC)(Ax(B-C)((A+C)-B) W002 57.((AxA)+C)((B-C)+A)(AxA)
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.