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March 2017



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CLOSED-SPU Wet Sediment Dewatering RFI #SPU 17-020-I

Original Date Posted: March 1, 2017 8:14 am

Due Date: 3:00 PM, Thursday, March 30, 2017

Request for Information (RFI) for
SPU Wet Sediment Dewatering
 RFI #SPU 17-020-I

Seattle Public Utilities (SPU), a subdivision of the City of Seattle providing municipal utility services to ratepayers, maintains over 1,400 miles of drainage and sewer conveyance pipeline, sweeps roadways, and conducts hydrovactor excavation practices on over 1,800 miles of water pipeline. These maintenance operations collect upwards of 200 tons of sediments per day but the disposal of this water-saturated pipeline cleaning waste and hydro-excavation waste is both difficult to handle and costly to dispose of wet, so the Utility conducts an “air-drying” step prior to this material’s discharge to a landfill.

SPU is preparing to construct a new facility in 2019-20 to add capacity to its present sediment “drying” operation and is seeking a mechanical dewatering process (an operating system) having the performance attributes of reduced size and better odor control the Utility may more easily install on its property. To improve operational efficiency, maintenance crews need to discharge their sediment waste (into this water removal step) in facilities which cannot accept a more traditional “air-drying” approach.

Seattle Public Utilities is seeking information to identify mechanical processes which have the capability to remove liquid from water-saturated sediments. This information will guide a subsequent solicitation for services to pilot an approach which has the potential to best meet the Utility’s needs.

Interested vendors are encouraged to review the complete RFI, including any background materials, online at Please note you are required to complete a free registration to view, print or save documents posted on this website.

The deadline for RFI submittal information is 3:00 PM, Thursday, March 30, 2017 at the 50th Floor, Seattle Municipal Tower, 700 Fifth Avenue, P.O. Box 34018, Seattle, WA 98104-4018 or electronically to

An optional SPU Pre-Submittal Conference for prospective responders will be held on Thursday, March 9, 2017 in Conference Room SMT 4090 (40th Floor) of the Seattle Municipal Tower Building, 700 Fifth Avenue, Seattle, WA 98104, from 3:00 PM to 4:00 PM.  Seattle Public Utilities will review the request for information and answer questions from the prospective responders.  Attendance is encouraged but is not mandatory.

Any questions regarding this request shall be directed to Lisa Hill, Contract Administrator & SPU’s designated contact person, at

This RFI is intended solely to identify industry practices and technologies the Utility may further consider, and is neither a form of solicitation nor an obligation to contract.

The City of Seattle is an Equal Opportunity Employer and selection of Vendors is subject to applicable laws and ordinances regarding equal opportunity employment.

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