You are hereHomeBARMarch/April 1980How Water Tunnels Worked James B. Pritchard, The Water System of Gibeon (Philadelphia, 1961), p. 8. See this volume for the most complete technical description of both the Pool and the stepped tunnel to the spring at el-Jib. Join the BAS Library! Already a library member? Log in here. Institution user? Log in with your IP address.