The National Park Service Pacific West Region awarded a purchase order to Mountain Barge Services LLC for $306,400 on September 24, 2026, under a Total Small Business set-aside for supply and delivery of 2,000 tons of Class D riprap to North Cascades National Park's Stehekin gravel pit. Performance occurs in Stehekin, Washington. The riprap must conform to Washington State Department of Transportation Specification 9-13 with specified sizing (54 inches down to 20 inches) and material properties including minimum apparent specific gravity of 2.50, maximum absorption of 4.2%, and minimum coarse durability index of 50. Delivery is constrained by road access available only by boat or aircraft; all loads must cross Harlequin Bridge within specified weight limits. The contractor quotes riprap supplied in 250-ton increments and all transportation and consolidation costs from quarry to gravel pit. Period of performance runs September 25, 2026 through June 25, 2027. The solicitation was posted September 16, 2026, with quotations due September 23, 2026, under the auspices of prior RFQ 140P8326Q0049 and Amendment P0001.