EMD GP31ECO

The GP31ECO is another variant in EMD's ECO locomotive conversion catalog. The locomotive is the first EMD ECO to utilize a 3,000 hp 8-710ECO prime mover. The locomotives are EPA Tier 1 compliant. So far two conversions have been conducted, both for Southern Peru Copper. #70 and 71 were rebuilt from GP40 cores, possibly of UP lineage. The locomotives emerged from Progress Rail's Tacoma shops in March and April 2013. 
Decoding this EMD ECO Designation
GP- General Purpose (core)
3- 3,000 hp
1- EPA Tier 1 emissions
ECO- EMD ECO locomotive
Category:EMD ECO repower
Category:DC Traction Locomotives
Category:Diesel locomotives
Category:Four-axled diesel locomotives
Category:EMD locomotives