Pine Bluff Sand And Gravel Company

Pine Bluff Sand And Gravel Company, operating as River Mountain Quarries, is a for-profit Arkansas-based construction materials and waterway infrastructure provider that delivers stone placement, dredging, and related civil works services exclusively as a prime contractor to the U.S. Army Corps of Engineers across 600 recent awards carrying $1.64 billion in combined potential value. The company competes on an unrestricted, full-and-open basis with no set-aside designations across its prime footprint, though it holds a named subsidiary, Pine Bluff Materials Co LLC, certified as a small disadvantaged business. River Mountain Quarries has been registered in SAM.gov since 2001 and operates from White Hall, Arkansas, with work performed throughout the Mississippi River Basin and Gulf Coast regions.

Customer concentration is extreme and monolithic. The Department of the Army Corps of Engineers accounts for 93% of awards by count and 96% of combined potential value across the portfolio, with subordinate offices—the New Orleans District, Memphis District, and Vicksburg District—anchoring the largest single contract vehicles. The top five customer nodes by award count and potential value are all Corps engineering districts, with the Corps' New Orleans District alone holding 54 awards valued at $387.7 million combined. This concentration reflects River Mountain Quarries' role as the sole responsible source for continuous dredging capability on the Mississippi River system and a primary vehicle for rapid stone placement and jetty repair mobilization across multiple districts.

River Mountain Quarries holds five primary indefinite delivery contracts with the Corps collectively valued at approximately $385.9 million through November 2029. The $150 million Mississippi River Stone Placement IDC (May 2024–May 2029) covers stone navigation structure placement—dikes, chevrons, bendway weirs, hardpoints, and bank paving—across the lower Mississippi River from River Mile 954 above head of passes (AHP) to 320 AHP, spanning Illinois, Kentucky, Missouri, Arkansas, Tennessee, Mississippi, and Louisiana. The $108.4 million Continuous Dredging Capability IDC (November 2024–November 2029) furnishes fully crewed self-propelled dustpan hydraulic pipeline dredges for shoal removal along the Mississippi River between River Mile 320 and 103 AHP. A $60 million South and Southwest Pass Stone Placement IDC (through June 2025) covers jetty repairs and stone delivery along the Gulf Coast. A $47.5 million FY24 Stone Placement IDIQ (through June 2026) and a $20 million Mississippi River Stone Repairs IDC (originally through September 2025) round out the active single-award vehicle set. Across these IDCs, River Mountain Quarries has issued 61 task orders totaling hundreds of millions in delivery order value. Recent representative work includes a $24.66 million delivery order for 2024 stone placement along the Mississippi, Atchafalaya, Red River, and Old River Control Channels issued April 16, 2025; a $16.5 million continuous dredging capability modification for fuel adjustment costs for Dustpan Dredge #2 issued January 22, 2025; a $6.368 million delivery order for dike construction near Loosahatchie, Tennessee (155,200 tons graded stone A, 3,200 tons graded stone C) issued September 30, 2025; and a $3.093 million purchase order (total small business set-aside) for Lafourche East and West Jetty rock supply issued October 1, 2025.

The top five parent vehicles by task order count (Indefinite Delivery Contracts DACW3887C0059, DACW3882C0050, DACW3886C0048, DACW3888C0058, and DACW3885C0025) carry 17, 12, 11, 11, and 10 task orders respectively. Activity has grown from 5 awards in 2022 to a peak of 13 in 2024, with recent annual volume at 8 awards (2025) and 2 awards (2026 year-to-date); 3 awards with combined potential value of $11.3 million face ultimate completion within the next twenty-four months and therefore present recompete exposure. By NAICS, the vendor's work sits dominantly in Other Heavy and Civil Engineering Construction (137 awards), followed by Other Crushed and Broken Stone Mining and Quarrying (13 awards), and smaller volumes in dimension stone mining, limestone mining, and construction material wholesaling. Primary PSC codes track to Construction of Other Non-Building Facilities (54 awards), Mineral Construction Materials Bulk (20 awards), and equipment lease or rental for marine work (16 awards). River Mountain Quarries operates as a prime contractor with no identified subcontractors across its reviewed federal awards and delivers all services in-house, positioning itself as the sole responsible source for specialized dredging and stone placement capability critical to the Corps' flood control, navigation, and coastal protection missions.