The coordinates for the cache are South ABo CD.EFG East HIJo KL.MNO, where A is the number inside the lid of River Roads #1 – Dee Street, B is the number inside the lid of River Roads #2 – Tamar Street and so on up to O, which is inside the lid of River Roads #15 – Severn Street.
When placed, the cache contained a Reef Check geocoin for the FTF, featuring the reefs and recreational diving for which Island Bay is also famous. Congratulations to TutBott for claiming this prize. Big ups to huhugrub and bruzie who weren't far behind and managed to suss out the location of this cache, even before it was published.
When you've found all the coordinate numbers, you can check your solution here.
