Metro Waste Authority Metro Recycling Facility

Grimes, IA | Food + Industrial


To make consumer recycling easier and divert more waste from landfills, the Metro Waste Authority (MWA) invested in a single-stream metro recycling facility (MRF) serving 16 member communities throughout Central Iowa.


To keep up with environmental regulatory changes and prepare for the future growth of Iowa communities, MWA took steps to expand its operations.


ISG assisted with the planning and design of a new facility positioned on a greenfield site, 14 acres of previously undeveloped land, adjacent to the City of Grimes transfer facility. The new facility is capable of sorting 45,000 tons per year and with the option to expand to 60,000 tons per year in a single shift production schedule. Equipment capabilities include an advanced infrared optical sorting system, anti-wrapping screen to reduce downtime and improve fiber recovery and metal detection.

ISG and waste/recycling consulting firm, Sloan Vazquez McAfee, assisted with the complex bidding process by developing the request for proposal for the MRF equipment, reviewing the proposals, preparing financial proformas for each proposed system, and making recommendations based on equipment evaluation of performance characteristics and pricing.

Additional planning and design services included site evaluation, city and state permitting, and facility design. An educational room was included in the building to hold community meetings and view the plant floor from an overlooking window and balcony. The view decks connect into the walking platforms, allowing visitors to walk to a viewing area within the equipment operations—giving them a first-hand look at how the system works.

Currently in construction, the facility is scheduled for a fall 2021 completion.

Business Unit News

ISG Takes Root In Rogers, Arkansas, With A New Office + Acquisition of Unit Architecture

August 17, 2023 (Rogers, Arkansas) – In the midst of celebrating their 50th anniversary, ISG is proud to announce expansion into Rogers, Arkansas. This strategic move marks a chapter of growth as the firm seeks to make a positive difference in more communities across the nation.
Read More

ISG Reinforces Its Commitment to South Dakota With A New Office In Pierre

Pierre, South Dakota (August 15, 2023)—Within weeks of expanding its Sioux Falls footprint to The Bancorp Building at Cherapa Place, architecture, engineering, environmental, and planning firm ISG further strengthens its ability to support South Dakota communities by opening an office in Pierre. This new location will boost the firm’s ability to serve clients throughout central and western South Dakota.
Read More