Susan E Davis

Susan E Davis, doing business as Davis Underground, operates as a woman-owned, Native American-owned, self-certified small disadvantaged sole proprietorship based in Claremore, Oklahoma, delivering water service line installations, aerobic wastewater treatment systems, septic tank and drainfield systems, and well drilling services exclusively to the Indian Health Service as a prime contractor. The company competes entirely under total small business and Indian Small Business Economic Enterprise set-asides, with 100% of its prime footprint consisting of IHS task orders and blanket purchase agreements.

Davis Underground's customer concentration is extremely narrow: 128 of 129 awards (99% of potential value) flow from the Department of Health and Human Services Indian Health Service across Oklahoma communities, with one outlier purchase order from the Army Corps of Engineers Tulsa District for $16 thousand. The IHS relationship has grown from initial awards in 2022, reaching 23 awards that year, contracting to 10 in 2023, then rebounding to 16–17 annually through 2025. The combined potential value across all awards sits at $4.6 million, with $1 million obligated to date (22% realization rate), reflecting the firm fixed-price call-order structure of the underlying BPAs.

The vendor's vehicle position consists entirely of five sequential single-award BPAs with the IHS. The largest active vehicle is Blanket Purchase Agreement 75H71123A00085 with a $250 thousand ceiling through May 2025, which has generated 28 task orders (combined potential value $241 thousand); it is being superseded by a $2.5 million BPA awarded in July 2025 through April 2030, representing the primary growth vehicle. Prior BPA 75H71120A00107 ($137 thousand from 25 calls), BPA 75H71122A00120 ($145 thousand from 19 calls), BPA 75H71121A00090 ($83 thousand from 14 calls), and BPA 75H71119A00180 ($68 thousand from 13 calls) represent the sequential contract history. Representative work includes a $2,687.50 firm fixed-price purchase order in April 2026 to install a water service line for H. North SR#1151 in Miami, Oklahoma (Indian Small Business Economic Enterprise set-aside), a $25 thousand BPA call in March 2026 to add lump sum funding for Project OK25-Y65-142906 under the Okmulgee Field Office (Total Small Business set-aside), and recurring calls averaging $7,000–$11,000 to furnish and install aerobic spray wastewater systems across Okmulgee, Beggs, Sapulpa, Broken Arrow, Muskogee, and other Oklahoma locations.

NAICS and PSC coding reflects the core capability: 128 awards under NAICS 237110 (Water and Sewer Line and Related Structures Construction) and 118 awards under PSC 3420 (Construction of Sewage and Waste Facilities), with 10 awards under PSC 3410 (Construction of Water Supply Facilities). Activity trajectory shows volatility—23 awards in 2022 fell to 10 in 2023, recovered to 16 in 2024 and 17 in 2025, with 3 awards recorded in 2026 to date. The incoming $2.5 million BPA awarded July 2025 represents the primary recompete opportunity and continuity signal, as it extends through April 2030 and covers aerobic systems, septic tank and drainfield systems, and individual well drilling services. Davis Underground holds no parent contract vehicles beyond the IHS BPA portfolio and does not operate as a subcontractor; the entire footprint is prime work directed to a single customer across low-dollar, high-volume task orders executed on Native American tribal lands in Oklahoma.

Septic System, Lateral Field, Aerobic System Installation, Aerobic System Repair, Aerobic System Maintenance, Water Line Installation, Utility Installation, Electric Line Installation, Gas Line Installation, Demolition, General Contractor, Excavation, Chamber System Installation, Lagoon Construction, Lift Station Installation