California Code, Civil Code - CIV § 845

(a) The owner of any easement in the nature of a private right-of-way, or of any land to which any such easement is attached, shall maintain it in repair.

(b) If the easement is owned by more than one person, or is attached to parcels of land under different ownership, the cost of maintaining it in repair shall be shared by each owner of the easement or the owners of the parcels of land, as the case may be, pursuant to the terms of any agreement entered into by the parties for that purpose.In the absence of an agreement, the cost shall be shared proportionately to the use made of the easement by each owner.

(c) If any owner refuses to perform, or fails after demand in writing to pay the owner's proportion of the cost, an action to recover that owner's share of the cost, or for specific performance or contribution, may be brought by the other owners, either jointly or severally.The action may be brought before, during, or after performance of the maintenance work, as follows:

(d) In the event that snow removal is not required under subdivision (a), or under any independent contractual or statutory duty, an agreement entered into pursuant to subdivision (b) to maintain the easement in repair shall be construed to include snow removal within the maintenance obligations of the agreement if all of the following exist:

(e) This section does not apply to rights-of-way held or used by railroad common carriers subject to the jurisdiction of the Public Utilities Commission.