Projects

Projects

Case Studies

OUR PROJECTS

Submar Chevron Bank Stability CS After

FLOOD CONTROL DITCH

Pipeline Exposure Repair

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 pipeline exposure was approximately 136 linear feet. Submar worked with a geotechnical survey company to establish subsurface soil conditions, find the location of the existing slope, and develop geotechnical engineering recommendations for pipeline exposure remediation.

Submar North Fork Black Hawk Creek After, AB11866

NORTH FORK BLACK HAWK CREEK

Streambank Stabilization

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 employed its proven streambank stabilization techniques to address and resolve this pipeline exposure.

Submar Northwest Branch Anacostia River After, 12846

NORTHWEST BRANCH ANACOSTIA RIVER

Streambank Stabilization

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 pipeline erosion issue. If left uncovered and unprotected, the pipeline exposure risked further damage due to continued erosion.

Submar Panther Run After, 12390

PANTHER RUN

Pipeline Erosion Control

Pennsylvania

Introduction

An 8-inch diameter propane pipeline that crosses Panther Run in Pennsylvania was exposed for approximately 12.5 linear feet due to several factors: 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. If left uncovered and unprotected, the site risked potential damage due to continued pipeline exposure.

Submar River Road Exposure After, AB15048

RIVER ROAD EXPOSURE

Pipeline Erosion Control

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 – had developed in a small drain that flows in to Big Blue River, exposing the pipeline for approximately 11 linear feet and suspending it for approximately 12 linear feet. If left uncovered and unprotected, the pipeline risked further exposure and possible damage due to unchecked pipeline erosion.

Submar Street Canal in Miami After, AB14236

CASE STUDY - CANAL PROTECTION

Streambank Stabilization

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 site risked further damage due to continued pipeline exposure.

Submar Unnamed Wash in NM After, AB13500

UNNAMED WASH

Pipeline Exposure Repair - MSE Wall

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.