W. Va. Code § 17C-17-6: Loads to be securely fastened and not allowed to leak, escape, etc.

(a) No vehicle or combination of vehicles shall be operated on any highway unless such vehicle or combination of vehicles is so constructed or loaded as to prevent any of its load from dropping, sifting, leaking, or otherwise escaping therefrom, except that sand may be dropped for the purpose of securing traction, or water or other substance may be sprinkled on a roadway in cleaning or maintaining such roadway.

(b) It shall be unlawful to operate on any highway any vehicle or combination of vehicles with any load unless said load and any covering thereon is securely fastened so as to prevent said covering or load from becoming loose, detached, or in any manner a hazard to other users of the highway.