Here is an excerpt of a report from today's
Federal Register discussing interlockings associated with the moveable bridges:
Docket Number FRA-2008-0010
Applicant: Northwestern Pacific Railroad Company, Mr. John H. Williams,
President, 385 Sherman Avenue, Suite 1, Palo Alto, California 94306-
1840
The Northwestern Pacific Railroad Company (NWP) seeks informal reconsideration of FRA's decision for denial of the proposed discontinuance and removal of the interlocking signal systems on three drawbridges that are located between a point near Lombard, California, at Milepost (MP) 63.4 and a point near Petaluma, California, at MP 38.5 on the NWP's Russian River Division at the following three locations:
Brazos Drawbridge, MP 64.7; Black Point Drawbridge, MP 28.7; and Haystack Landing Drawbridge, MP 37.2.
The reasons given for the reconsideration are: the addition of concurrence of the Sonoma-Marin Area Rail Transit District (SMART), clarification that SMART does not have plans to operate passenger trains over either the Brazos Drawbridge or the Black Point Drawbridge, and the fact that SMART has plans to replace the Haystack Landing
Bridge as part of the passenger rail project with a modern lift bridge with interlocking signal protection before any passenger trains operate over it.
Source:
[
edocket.access.gpo.gov]