The grantees to whom the legislature has granted the right to construct and maintain a railroad, by virtue of a special charter or of the general laws, may enter upon any land which falls within their route, and by their agents and engineers may make such surveys as they deem necessary.
RSA 245:2
GS 146:5. GL 160:5. PS 158:2. PL 248 :2. RL 298:2.