Photograph of flood prevention, Washita River, Ionine Creek. Critical silt source area. View looking up gully to the north. Vegatative work has been done, Structural works are just starting.

Photograph of Washita River, Ionine Creek. Critical silt source area. View looking up gully to the north. Vegative work has been done. Structural works are just starting.

Photograph of Ionine Creek, an aerial view of a critical silt source area. This huge gully has been treated vegetative, and a structure is to be built on the lower end. Fields were planted to native grasses and tree plantings made in 1957.

Photograph of silt source area treatment. Indiangrass was planted in March 1957 in existing annual weed cover. See OK-448-6 and -7.

Photograph of a silt source area treatment. Switchgrass was planted in March 1957. There has been no grazing by domestic livestock. Trees are growing in and along a huge gully. Slope in the distance was planted at the same time. See OK-425-1. OK-1425-3.

Photograph of sand bluestem and sideoats grama growing on Nash-Quinlan soil. The back of the photograph proclaims, "Soil Profile. Area associated with Nash-Quinlan mapping unit. Sand bluestem and sideoats grama are dominant."

Photograph of Nash-Quinlan soil complex with severe erosion. The area has been abandoned for cultivation and is an early stage of natural revegetation. Annual three-awn is dominant. OK-1425-6.

Photograph of soil profiles. Area associated with Nash-Quinlan mapping unit. Sand bluestem in the dominaqnt vegetation. OK-1418-12.

Photograph of a hilly field of switchgrass and a slope in the distant background. The trees in the background are growing in and around a gully. The back of the photograph proclaims, “Silt Source area treatment. Switchgrass was planted in March 1957. There has been no grazing by domestic livestock. Trees are growing in and along huge gully. Slope in the distance was planted at the same time. See Ok-425-1.”

Photograph of a hilly field of switchgrass and a slope in the distant background. The trees in the background are growing in and around a gully. The back of the photograph proclaims, "Silt Source area treatment. Switchgrass was planted in March 1957. There has been no grazing by domestic livestock. Trees are growing in and along huge gully. Slope in the distance was planted at the same time. See Ok-425-1."

Photograph of west side of water impoundment Plot No. 2 previously flooded three times for 10 days each as follows: (1) 3/21/61 to 3/31/61; (2) 5/3/61 to 5/13/61; (3) 6/13/61 to 6/23/61. Considerable damage to grasses resulted from these inundation periods. This study is in response to SCS research needs. Work is under the supervision of Edd D. Rhoades, Agricultural Engineer, ARS-SWC.

Photograph of water impounding Plot No. 6, one of six, used to study inundation tolerance of selected species of grasses associated with flooded areas above floodwater retarding structures. Viewed from top of embankment at lower end of plot. Edd D. Rhoades is shown standing at the five foot depth location. This plot has been flooded two times, 4/30/61 to 6/12/61 and 6/12/61 to 6/17/61. No damage was observed after the first flooding and only slight damages were noted after the second flooding. This study is in response to SCS research needs. Work is under the supervision of Edd D. Rhoades, Agricultural Engineer, ARS-SWC.

Photograph of water impounding plot constructed by ARS-SWC to study inundation tolerance of selected species of plants associated with watershed treatment (floodwater retarding structures). Water will be 5 feet deep at lower end of plot. Six plots are planned for the study. Reddish Prairie, virgin rangel and Noble Loam, slope 7%, erosion 1, Class LV. This study is in response to SCS research needs. Work is under the supervision of Edd D. Rhoades, Agricultural Engineer, ARS-SWC.

Photograph of west side of water impounding Plot 5, previously flooded ftwo times for 10 days each, as follows: (1) 4/30/61 to 5/10/61 and (2) 6/12/61 to 6/22/61. Considerable damage to grasses resulted from these inundation periods. This study is in response to SCS research needs. Work is under the supervision of Edd D. Rhoades, Agricultural Engineer, ARS-SWC.

Photograph of a panoramic view of six water impounding plots used to study inundation tolerance of selected species of grasses associated with flooded areas above floodwater retarding structures. Plot 6, to the right, has just been drained. This view is from hillside above southeast corner of plots. This study is in response to SCS research needs. Work is under the supervision of Edd D. Rhoades, Agricultural Engineer, ARS-SWC.

Photograph of a panoramic view of six water impounding llots being used to study inundation tolerance for selected species of grasses associated with flooded areas above floodwater retarding structures, as seen from southwest fence corner. Plot 1 is shown in the foreground. This study is in response to SCS research needs. Work is under the supervision of Edd D. Rhoades, Agricultural Engineer, ARS-SWC.

Photograph of a close-up view of the right side of water impounding Plot 2 as seen from the lower end. This plot has been flooded two times previously for 10 days, from 3/21 to 3/31/61 and again from 5/3-13/61. No damages were noted from the first flooding; however, considerable damages were observed as a result of the second flooding. This study is in response to SCS research needs. Work is under the supervision of Edd D. Rhoades, Agricultural Engineer, ARS-SWC.

Photograph of a close-up view of the right side of water impounding Plot 1 as seen from the lower end. This plot has been flooded tow times previously for 5 days frrom 3/21-26/61 and 5/4-9/61. Only slight damages were noted as a result of these floodings. This study is in response to SCS research needs. Work is under the supervision of Edd D. Rhoades, Agricultural Engineer, ARS-SWC.

Photograph of a close-up view of the right side of water impounding Plot 3 as seen from the lower end. This plot has been flooded two times for 20 days from 3/22/61 to 4/11/61 and again from 5/2/61 to 5/22/61. None to slight damages were noted from the first flooding; however, severe damages and loss of grass resulted from the second flooding. This study is in response to SCS research needs. Work is under the supervision of Edd D. Rhoades, Agricultural Engineer, ARS-SWC.

Photograph of a close-up view of the cente of water impounding Plot 2 as seen from the lower end. This plot has been flooded two times previously for 10 days from 3/21-31/61 and again from 5/3-13/61. No damages were noted from the first flooding; however, considerable damages were observed as a result of the second flooding. Numerous grasses did not survive and growth was suppressed on others. This study is in response to SCS research needs. Work is under the supervision of Edd D. Rhoades, Agricultural Engineer, ARS-SWC.

Photograph of a view across upper end of Plot 3 while flooded. This shows plants protruding from water simulating actual condition in detention reservoirs. This plot was previously flooded from 3/22/61 to 4/11/61 and current flooding commenced 5/2/16 and is scheduled to continue until 5/22/61. This study is in response to SCS research needs. Work is under the supervision of Edd D. Rhoades, Agricultural Engineer, ARS-SWC.

Photograph of a close-up view of the left side of water impounding Plot 1 as seen from the lower end. This plot has been flooded two times previously for 5 days from 3/21-26 and again from 5/4-9/61. Only slight damages wee noted as a result of these floodings. This study is in response to SCS research needs. Work is under the supervision of Edd D. Rhoades, Agricultural Engineer, ARS-SWC.

Photograph of Edd "D. Rhoades, Agricultural Engineer, ARS-SWD, checking water temperature in one of six water impounding plots being used to study the inumdtion tholerance of selected species of grasses associated with flooded aeas above floodwater retarding structures. High and low water temperaturews are checked daily. This study is in response to SCS research needs. Work is under the supervision of Edd D. Rhoades, Agricultural Engineer, ARS-SWC.

Photograph of water impounding Plot 2, one of six being used to study water inumdation tolerance of selected species of grasses associated with flooded areas above floodwater retarding structures. Viewed from top of embankment at lower end of plot. Edd D. Rhoades shown standing at the 5 foot depth location. This plot has been flooded three times: (1) 3/20/61 to 3/31/61 (10 days); (2) 5/3/61 to 5/13/61 (10 days); and (3) 6/13/61 to 6/23/61 (10 days). No damage was observed after the first flooding; slight damage was noted after the second flooding and considerable damage was noted after the third flooding. This study is in response to SCS research needs. Work is under the supervision of Edd D. Rhoades, Agricultural Engineer, ARS-SCS.