Water Quality Survey of the Timber Creek prepared for the Iowa Department of Environmental Quality by the University of Iowa Hygienic Laboratory, 1978

(1978) Water Quality Survey of the Timber Creek prepared for the Iowa Department of Environmental Quality by the University of Iowa Hygienic Laboratory, 1978. University of Iowa

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Abstract

Timber Creek Basin is a relatively small watershed with a drainage area of approximately 124 square miles(1), located entirely in Marshall County (see Figure 1). The merging of North Timber and Middle Timber Creeks, south of Marshalltown, forms Timber Creek which flows in a north-easterly direction to its junction with the Iowa River. Only one major tributary, South Timber Creek, discharges into Timber Creek. The entire reach of Timber Creek, and South Timber Creek from its confluence with Timber Creek to the junction with Brush Creek, have been designated as class B warmwater streams(2). The terrain of the drainage basin is moderately hilly. Most of the land is used primarily for pasture, with some production of row crops. There is no large point source discharge in the Timber Creek Basin, although four small municipalities (State Center, Haverhill, Gilman and Ferguson) are located within the watershed. Information regarding the existing wastewater treatment facilities in the basin, as well as the municipalities current status in the construction grants program is presented in Table 1. This survey was conducted by University Hygienic Laboratory personnel on August 29 and 30, 1978, in order to obtain water quality data on a basin that had not previously been studied. Table 2 lists the sampling locations utilized during the present survey of the Timber Creek Basin.