Projects

Projects

Case Studies

OUR PROJECTS

Submar Chevron Bank Stability CS After

BANK STABILIZATION

Texas

Introduction

A pipeline right-of-way (ROW) with two 8-inch pipelines and one 10-inch pipeline parallels a flood-control ditch near residential homes. Bank migration had exposed the pipelines; the largest exposure was approximately 136 linear feet. Submar worked with a geotechnical survey company to establish subsurface soil conditions, to find the location of the existing slope, and to develop geotechnical engineering recommendations.

Submar North Fork Black Hawk Creek After, AB11866

NORTH FORK BLACK HAWK CREEK

Pipeline Exposure Repair

Iowa

Introduction

Lateral migration caused by the meandering stream exposed two 26-inch diameter pipelines that cross North Fork Black Hawk Creek in Iowa.

Submar Northwest Branch Anacostia River After, 12846

NORTHWEST BRANCH ANACOSTIA RIVER

Pipeline Exposure Repair

Maryland

Introduction

A 22-inch diameter natural gas pipeline that crosses the northwest branch of the Anacostia River in Maryland had become exposed due to bank erosion and lateral migration of the channel. Previously placed rock failed to remediate the erosion issue. erosion.

Submar Panther Run After, 12390

PANTHER RUN

Pipeline Exposure Repair

Pennsylvania

Introduction

An 8-inch diameter propane pipeline crosses Panther Run in Pennsylvania. All-terrain vehicle (ATV) traffic had created several small streams over the pipeline. The channel bed of Panther Run had degraded, and the banks had begun to migrate, leaving the pipeline exposed for approximately 12.5 linear feet. If left uncovered and unprotected, the pipeline risked further exposure and potential damage due to continued erosion.

Submar River Road Exposure After, AB15048

RIVER ROAD EXPOSURE

Pipeline Exposure Repair

Indiana

Introduction

A 10-inch diameter natural gas pipeline crosses a tributary to Big Blue River in Indiana. A headcut — an abrupt drop in the bed of the channel — developed in a small drain that flows in to Big Blue River and has exposed the pipeline for approximately 11 linear feet and left it suspended for approximately 12 linear feet. If left uncovered and unprotected, the pipeline risked further exposure and possible damage.

Submar Street Canal in Miami After, AB14236

CASE STUDY - CANAL PROTECTION

Pipeline Exposure Repair

Florida

Introduction

A 6-inch diameter natural gas pipeline crosses a canal in Florida. Sheetflow from the adjacent street and high flow events’ impact had exposed the pipeline. 3-in-1 concrete bags had been placed atop the pipeline in an effort to protect it, but the sheetflow and high flow events had removed cover behind the bags. If left unprotected, the pipeline risked further exposure and possible damage.

Submar Unnamed Wash in NM After, AB13500

UNNAMED WASH

New Mexico

Introduction

A 15-foot deep erosion rill had formed in an unnamed wash due to storm water flows, exposing one of four natural gas pipelines in the area. If left uncovered and unprotected, the pipeline risked further exposure and potential damage due to continued erosion.