Building a 100 x 200 Riding Arena
https://privatebin.net/?3d1b91a675e6186e#AwVp1ACQugcNLrEdu4Wdgf4tVUmczK7qeJnTRBuC6JT
A drainage system that is well-designed, carefully maintained, and has a long life and high performance is essential to the performance and longevity of an arena