--- title: Keeping it Clean in Washington D.C. With STELCOR | IDEAL Group description: Learn about Stelcor piles in Washington D.C. and their role in maintaining clean infrastructure. Explore sustainable foundation solutions. image: https://www.idealfoundationsystems.com/hubfs/Imported_Blog_Media/DC-SEWER-2-1024x576-2.jpg --- [Skip to main content](https://www.idealfoundationsystems.com/blog/keeping-it-clean-washington-d-c-stelcor#maincontent) [ «  View All Posts ](https://www.idealfoundationsystems.com/learning-center/) # Keeping it Clean in Washington D.C. With STELCOR February 2nd, 2018 1 min read By [Bruce Stroyer](https://www.idealfoundationsystems.com/blog/author/bruce-stroyer) ![](https://www.idealfoundationsystems.com/hs-fs/hubfs/Imported_Blog_Media/DC-SEWER-2-1024x576-2.jpg?width=1024&height=576&name=DC-SEWER-2-1024x576-2.jpg) OVERVIEW: The Clean Rivers Project is DC Water’s ongoing program to reduce combined sewer overflows into the District’s waterways. The Project is a massive infrastructure and support program designed to capture and clean wastewater during rainfalls before it ever reaches the rivers. The project is comprised of a system of deep tunnels, sewers and diversion facilities to capture combined sewer overflows and deliver them to a wastewater treatment plant. CHALLENGE: This particular section of tunnel runs down the center of a busy road, so scheduling was restrictive and keeping install time to a minimum was a priority. There was also limited access for installation equipment and staging materials. In addition, the installation of piles was weather dependent, and therefore subject to change without notice. ![DC Water and Sewer Dept Stelcor Drilled-In Displacement Micropiles ](https://www.idealfoundationsystems.com/hs-fs/hubfs/Imported_Blog_Media/DC-SEWER-768x1365-1.jpg?width=576&height=1024&name=DC-SEWER-768x1365-1.jpg) SOLUTION: **[Creative Concepts Group, Inc.](http://www.ccgicorp.com/) **presented STELCOR Drilled-In Displacement Piles (DDM) to the D.C. Water & Sewer Department as an alternate. Engineers believed that a helical pulldown pile was substandard and would have failed in torsion at less than 20,000 *ft*⋅lbf. A STELCOR pile was tested and exceeded the requirements. STELCOR had a resistance of 30,000 to 40,000 *ft*⋅lbf in the top 10 feet and had a torque capacity of over 50,000 *ft*⋅lbf. With limited access and a tight schedule, a total of 46 [STELCOR piles](https://www.idealfoundationsystems.com/stelcor-products/) were installed for this thrust block reinforcement foundation. The STELCOR piles were able to bear higher loads at lesser depths, saving time and money. **INSTALLER: ** Creative Concepts Group, Inc. **GEOTECHNICAL ENGINEER: ** D.C. Clean Rivers Project **STRUCTURAL ENGINEER: ** Bryant Blake P.E. **ARCHITECT: ** Reitan Architects LLC **LOADS:** Anticipated – 200 kips factored (compression and tension) Actual – 102 Kips (Compression) 114 Kips Tension Piles met refusal at less than half of the anticipated depth **PILE DETAIL:** STELCOR 1600 18” tip or drive plate 16” corrugated grout column 13” solid grout column 8” reverse auger 5.5” O.D. X 0.361″ W.T. – 80 ksi central shaft **SOILS + EMBEDMENT DEPTH:** Soils consisted of clayey sands, silty sand, and silty gravel with sand. Piles were intended to go 62’ but all piles met refusal at approximately 30’. [DC WATER & SEWER – CLEAN RIVERS – FULL CASE STUDY](https://www.idealfoundationsystems.com/hubfs/CASE%20STUDY/STELCOR%20-%20DC%20WATER%20&%20SEWER%20-%20Complete.pdf) Topics: [ Limited Access ](https://www.idealfoundationsystems.com/blog/topic/limited-access) [ Case Study ](https://www.idealfoundationsystems.com/blog/topic/case-study) [ Drilled-In Displacement Piles (DDM) ](https://www.idealfoundationsystems.com/blog/topic/drilled-in-displacement-piles-ddm) [ STELCOR ](https://www.idealfoundationsystems.com/blog/topic/stelcor) Don't forget to share this post: ## Related Articles [![](https://www.idealfoundationsystems.com/hs-fs/hubfs/Baltic%20St_.png?width=713&height=401&name=Baltic%20St_.png) ### STELCOR Supports a Complex Development Site in Brooklyn’s Gowanus Neighborhood May 18th, 2026|1 min read ](https://www.idealfoundationsystems.com/blog/stelcor-supports-a-complex-development-site-in-brooklyns-gowanus-neighborhood) [![](https://www.idealfoundationsystems.com/hs-fs/hubfs/86%20DELANCEY%20web(16)--jpg.jpeg?width=720&height=471&name=86%20DELANCEY%20web(16)--jpg.jpeg) ### NYC - 112 STELCOR® Piles to 30' for a 12-Story Mixed-Use Rental Building June 23rd, 2025|1 min read ](https://www.idealfoundationsystems.com/blog/nyc-112-stelcor-piles-to-30-for-a-12-story-mixed-use-rental-building) [![](https://www.idealfoundationsystems.com/hs-fs/hubfs/Imported_Blog_Media/brokk_drillingserviceco_1.jpg?width=1267&height=950&name=brokk_drillingserviceco_1.jpg) ### REMOTE-CONTROLLED DEMOLITION EQUIPMENT SOLVES CHALLENGING HELICAL PIER INSTALLATION March 10th, 2023|1 min read ](https://www.idealfoundationsystems.com/blog/remote-controlled-demolition-equipment-solves-challenging-helical-pier-installation) [![STELCOR® DDMS TOUCHING DOWN AT JFK AIRPORT](https://www.idealfoundationsystems.com/hs-fs/hubfs/Imported_Blog_Media/20220617_140517-WEB-scaled.jpg?width=2560&height=1920&name=20220617_140517-WEB-scaled.jpg) ### STELCOR® DDMS TOUCHING DOWN AT JFK AIRPORT October 31st, 2022|1 min read ](https://www.idealfoundationsystems.com/blog/stelcor-at-jfk) [![](https://www.idealfoundationsystems.com/hs-fs/hubfs/Imported_Blog_Media/FNC-rendering-web-150x150-1.png?width=150&height=150&name=FNC-rendering-web-150x150-1.png) ### STELCOR For The First National Center August 10th, 2020|1 min read ](https://www.idealfoundationsystems.com/blog/stelcor-for-the-first-national-center) [![](https://www.idealfoundationsystems.com/hs-fs/hubfs/Imported_Blog_Media/malt-house-new-rendering.jpg?width=736&height=552&name=malt-house-new-rendering.jpg) ### NYC – Stelcor® in the Manhattanville Factory District for the Malt House Building May 29th, 2020|1 min read ](https://www.idealfoundationsystems.com/blog/nyc-stelcor-manhattanville-factory-district-malt-house-building) [![](https://www.idealfoundationsystems.com/hs-fs/hubfs/Imported_Blog_Media/5299F445-web.jpg?width=864&height=648&name=5299F445-web.jpg) ### STELCOR Seals of Approval – 150,000-Gallon Harbor Seal Exhibit in Norwalk, CT April 2nd, 2020|1 min read ](https://www.idealfoundationsystems.com/blog/seals-of-approval) [![](https://www.idealfoundationsystems.com/hs-fs/hubfs/Imported_Blog_Media/NYHC-awards_DraperHall_image4-910x1024-910x1024-1.jpg?width=910&height=1024&name=NYHC-awards_DraperHall_image4-910x1024-910x1024-1.jpg) ### 295 STELCOR® DDM for the new 16-Story Gilbert in NYC March 9th, 2019|1 min read ](https://www.idealfoundationsystems.com/blog/its-gonna-be-a-gilbert) [![](https://www.idealfoundationsystems.com/hs-fs/hubfs/Imported_Blog_Media/web-thumbnail-dhl-jfk-stelcor-1024x664.jpg?width=1024&height=664&name=web-thumbnail-dhl-jfk-stelcor-1024x664.jpg) ### NYC – STELCOR Piles For The DHL Warehouse At JFK Airport February 12th, 2019|1 min read ](https://www.idealfoundationsystems.com/blog/dhl_jfk_nyc_stelcor) [![](https://www.idealfoundationsystems.com/hs-fs/hubfs/Imported_Blog_Media/86-DELANCEY-5.jpg?width=600&height=800&name=86-DELANCEY-5.jpg) ### A Boring Story – How to Save 6 Weeks, 50 Foot, and $500,000.00 August 3rd, 2018|1 min read ](https://www.idealfoundationsystems.com/blog/1972-2) [![](https://www.idealfoundationsystems.com/hs-fs/hubfs/Imported_Blog_Media/DSC01761-web.jpg?width=872&height=583&name=DSC01761-web.jpg) ### Cornell University – STELCOR® DDM for Increased Column Loading In The Historic Rand Hall March 21st, 2018|1 min read ](https://www.idealfoundationsystems.com/blog/cornell-university-stelcor-ddm-increased-column-loading-historic-rand-hall) ```json { "@context" : "https://schema.org", "@type" : "BlogPosting", "author" : { "@type" : "Person", "name" : "Bruce Stroyer", "url" : "https://www.idealfoundationsystems.com/blog/author/bruce-stroyer" }, "dateModified" : "2025-01-20T18:59:42.597Z", "datePublished" : "2018-02-02T17:58:28.000Z", "headline" : "Keeping it Clean in Washington D.C. 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