Hickahala Creek Pipeline Protection Project at milepost 347.64Tate County, Senatobia, MS (Looking across and upstream in this view)Designed jointly by Submar, Inc & River Research and Design, Inc,

Installed, & Monitored by:Submar Incorporated

805 Dunn St., Houma, LAwww.R2D-ENG.com www.Submar.com

Arresting an active headcut

at the downstream end

of the ACM

July 2004

Looking US 10 months after project completion, veg looking good, note mat has arrested a small headcut

LOOKING US, JULY 2004

April 2005

ACM is acting as a “hinged” grade control structureLooking US 1 year later, headcut of similar size as 2004

LOOKING US, JULY 2004

April 2006

Another year later, ACM is acting as a “hinged” grade control structure (adjusting to bed lowering due to headcut)

LOOKING US, JULY 2004

April 2006

Submar ACM system has arrested a larger headcut

LOOKING US, JULY 2004

March 2007

1-year later, larger headcut arrested by Submar mat

April 2007

Note uneven DS edge of adjusting mat. Pipeline still well protected.

January 2008

Approximately 14 ft of mat left until headcut gets back to the pipeline.

Pix by Lloyd Falgout

March 18, 2009

A more uniform adjustment of the mat to the headcut, but still approximately 14 ft until the

headcut gets back to the pipeline.

Pix by Derrick

March 18, 2009

Looking perpendicular to flow at ACM adjusting to stabilize the headcut.

Pix by Derrick

Always carry your best

friend to the

formal!!

Cleophus (as a puppy) Rules!!!