Built in 2013, by Conrad Shipyard Incorporated of Morgan City, Louisiana (hull #C-1027) as the Alamo for Harley Marine Services Incorporated of Seattle, Washington.

Named for horse ridden by James “Jim” Newill in the television series "Texas Rangers."

In 2019, Harley Marine Services Incorporated became the Centerline Logistics Corporation of Seattle, Washington. Where the tug retained her name.

Powered by two, Tier II compliant, Cummins K38M diesel engines. With Twin Disc MGX5321 reduction gears, at a ratio of 5.96:1. Turning two, 72(in), four bladed, fixed pitch propellers. She is a twin screw towboat, rated 2,000 horsepower.

Her electrical service is provided by two, 85kW Cummins 6BTA5.9-DM generator sets. The tug's capacities are 30,000 gallons of fuel, 6,000 gallons of water, and 200 gallons of lube oil.

The towing gear consists of two, Nabrico Model 20-HE Hydro Electric push winches, mounted on her bow.