Yes it does.
i don't know what "was" means but the Pecos river is a tributary to the Rio Grande
Pecos
Pecos
There are two rivers: Mexico's Rio Conchos, and Texas's Pecos River.
Rio Grande and the Pecos River.
The Rio Grande River flows into the Gulf of Mexico which is a marginal sea of the Atlantic Ocean.
New Mexico has two major bodies of water: the Rio Grande and the Pecos River. The Rio Grande forms part of the state's southern border and is one of the longest rivers in the U.S. The Pecos River flows through eastern New Mexico and eventually merges with the Rio Grande.
The Rio Grande is the largest river of New Mexico, starting in the northern mountainous region of the state and winding southward through the middle until it becomes the border between Texas and Mexico. Other important rivers of New Mexico are the Canadian, Gila, Pecos and San Juan.
The major waterways in the Mountains and Basins region include the Rio Grande, Pecos River, and the Devils and Hueco rivers. These rivers provide crucial water resources for the region's ecosystems and human populations. Additionally, there are various smaller streams and creeks that flow through the mountainous terrain of the region.
This river is in the USA
Elephant Butte Lake Navajo Lake Rio Grande Pecos San Juan
rio grande