# Drawbridge Operation Regulation; Three Mile Slough, Rio Vista, CA
**AGENCY:**
Coast Guard, DHS.
**ACTION:**
Notice of temporary deviation from regulations.
**SUMMARY:**
The Commander, Eleventh Coast Guard District, has issued a temporary deviation from the regulation governing the operation of the California Route 160 Drawbridge across Three Mile Slough, mile 0.1, near Rio Vista, CA. The deviation is necessary to allow Caltrans to conduct drawbridge maintenance. This deviation allows the bridge to remain in the closed-to-navigation position during the maintenance period.
**DATES:**
This deviation is effective from 8 a.m. on October 15, 2009 through 4 p.m. on November 4, 2009.
**ADDRESSES:**
Documents mentioned in this preamble as being available in the docket are part of docket USCG-2009-0896 and are available online by going to *www.regulations.gov* , inserting USCG-2009-0896 in the “Keyword” box and then clicking “Search.” This material is also available for inspection or copying at the Docket Management Facility (M-30), U.S. Department of Transportation, West Building Ground Floor, Room W12-140, 1200 New Jersey Avenue, SE., Washington, DC 20590, between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays
**FOR FURTHER INFORMATION:**
If you have questions on this rule, call or e-mail David H. Sulouff, Chief, Bridge Section, Eleventh Coast Guard District; 510-437-3516, *[email protected].* If you have questions on viewing the docket, call Renee V. Wright, Program Manager, Docket Operations, 202-366-9826.
**SUPPLEMENTARY INFORMATION:**
Caltrans requested a temporary change to the operation of the California Route 160 Drawbridge, mile 0.1, Three Mile Slough, near Rio Vista, CA. The drawbridge navigation span provides a vertical clearance of 12 feet above Mean High Water in the closed-to-navigation position. The drawbridge opens on signal as required by 33 CFR 117.5. Navigation on the waterway is commercial and recreational.
The drawbridge will be secured in the closed-to-navigation position from 8 a.m. through 4 p.m. Monday through Friday, from October 15, 2009 through November 4, 2009, to allow Caltrans to replace the industrial staircase leading to the control house. At all other times during this period the drawbridge will open on signal as required by 33 CFR 117.5. This temporary deviation has been coordinated with commercial and recreational waterway users. There is no anticipated levee maintenance during this deviation period. No objections to the proposed temporary deviation were raised.
Vessels that can transit the drawbridge, while in the closed-to-navigation position, may continue to do so at any time.
In the event of an emergency the drawbridge can be opened with 4 hours advance notice.
In accordance with 33 CFR 117.35(e), the drawbridge must return to its regular operating schedule immediately at the end of the designated time period. This deviation from the operating regulations is authorized under 33 CFR 117.35.
Dated: October 01, 2009.
S.P. Metruck,
Captain, U.S. Coast Guard, Acting Commander, Eleventh Coast Guard District.