IWS and Souder Miller Team on DB for Tesuque Pueblo

IWS recently teamed with Souder, Miller and Associates (SMA) on a Design-Build approach to install an improved wastewater treatment system (WWTS) with the capacity to treat up to 30,000 GPD for the 132 home Tesuque Trailer Village owned and operated by the Pueblo of Tesuque located 10 miles north of Santa Fe, NM. The Design-Build contract with the Pueblo was to permit, design, construct, and start-up the WWTS, which is replacing three undersized and failing septic tanks and leach fields.

The Pueblo of Tesuque is a member of the Eight Northern Pueblos and is from the Tewa speaking ethnic group of Native Americans. One of the most traditional of all the Tewa speaking Pueblos, the Tesuque have maintained their customs and traditions even though they have been in contact with outside cultures throughout much of their history. Archaeologists have determined that the Pueblo existed before 1200 A.D. Tesuque Trailer Village consists of two main areas, the original area developed around 1960 and the new area developed in the mid-1980s. Infrastructure in the older area was in poor condition and water and sewer improvements to replace leaking and deteriorated water and sewer lines were conducted as a separate component of this project by SMA.

The WWTS was designed and managed by Ewan Young, Peter Fant, P.E., Kari Edenfield, P.E. and Eric Tawney, P.E. of SMA to replace the existing system. The new system utilizes gravity collection to convey wastewater to two new underground fiberglass septic tanks of 35,000 and 40,000 gallons, respectively. From the septic tanks, effluent is pumped through a septic tank effluent pressure (STEP) system to an Advantex treatment facility which treats the wastewater and then disperses it through a low pressure disposal (LPD) field in multiple zones in rotation, so that between doses, each zone has ample time to drain.

Additional treatment is attained in the LPD field as the discharge occurs within 18” of the surface, where the most biologically active soil layer is present. The IWS scope of work included installing: a) 35,000 and 40,000 gallon STEP tanks; b) 1,360 ft of sewer force main to connect the STEP system to the WWTS; c) a 35,000 gallon recirculation tank; d) 12, AX-100 Advantex pods; e) a 20,000 gallon anoxic/dosing tank; and f) a Treatment Control Panel. The overall construction was substantially completed in 18 weeks.

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