12-13446 - Laserfiche WebLink

Browse Search

Subsidence tnvestigation SDII Project Tlumber•3023547 Quiros-Martinez Residence-Zephyrhills,Florida website, the one-story structure was built in 1980. There were no reported or obs�;;rved additions. The current owners have owned the home since 2004. The property was predominantly flat. The observed damage to the house consis�ed of cracks in the walls, concrete slab, and ceiling of the residence. According to the homeowr�er, the damage was first noticed approximately two months prior to this investigation. A more detailed description of the observed damage is discussed in "Sectiorr, 3.0 Structural Evaluation". Photographs showing representative examples of the observed damage to the structure are provided on Figure 2. A complete set of photographs taken at the pr�:�perty has been archived and is available upon request. 1.5 Review of Published Soils Data The Soil Conservation Service(SCS)Soil Survey for Pasco County' lists the soils underiying the residence as Tavares-Urban land complex. These soils consist of areas of urban :land and nearly leve] to gently sloping, moderately drained Tavares soils on low ridges. Tavares soils are sand to a depth of 80 inches or more. Typically, the surface la}�er is very dark �ray and is about 3 inches thick. Beneath the surface layer the sand is yellowish ti+rown and light yellowish brown to a depth of 56 inches, very pale brown to between depths of 56 and 76 inches, and white between depths of 76 and 80 inches or more. Sewer systems, surface ditches, and canals artificially drain most areas of this com.plex. Tavares soils that are not drained have a water table at a depth of 40 to 60 inches for 6 to 10 months in most years. Penneability is very rapid tl�roughout the Tavares soils. The available water capacity is very low. 1.6 Review of Published Topographic Data and Aerial Photographs The U.S. Geological Survey topographic map of the areaZ indicated that the est:imated gound surface elevation for the site is approximately 90 to 95 feet NGVD. Closed depressions that might indicate ancient sinkhole activity were shown on the topographic map within a. mile of the house. Closed depressions do not necessarily indicate cu�rrent sinkhole activity and may represent other origins of the landform. 1.7 Review of Published Hydrologic Data The potentiometric surface of the Floridan aquifer in the area of the residence had an estimated range from 60 to 70 feet above mean sea level3 This elevation range is below larnd surface and the apparent elevation of the water table, so there is a downward vertical hydraulic t;;radient. ' Soi]Conservation Service, 1982. Soi] Survey of Pasco County,U.S.Department of Agriculture Z U.S.Geological Survey, 1990 Zephyrhills Quadrangle.Washington,D C., 1.24,000 topographic m,ap. 'Duerr,A.D.,2001 Potentiometric Map ofthe Floridan Aquifer,May,2001 U.S.Geological Surve,y 1-3