Photograph of A.H. Osborn of Altus, OK making the first push of soil into ridge of broadbase type terrace construction. Soil being removed from back side of terrace to build the terrace fill.

Photograph of boating and water skiing can be enjoyed on Cobb Creek floodwater retarding structure No. 1.

Photograph of prarrie cordgrass (first grass in front of sign) vine Mesquite (second grass in front of sign) and alkali sacaton (foreground) in impoundment basin number 4 at a depth of 1.0 foot following two floodings of 10 days during early spring (3/22-4/1/62) and mid-spring (5/3-13/62). There was no evidence of damage to any of the grasses, except a very slight suppression of growth. For a view of this grass when flooded at same time, except at a depth of 5.0 feet, see Ok-1760-7, dated 6/8/62. This research is under the supervision of Edd D. Rhoads, Agricultural Engineer, ARS-SWC.

Photograph of prarrie cordgrass (in front of sign) in impoundment basin number 6 at a depth of 5.0 feet following two floodings of 20 days during early spring (3/21-4/10/62) and mid-spring 5/2-22/62). Note the severe suppression of growth. For a view of this grass when flooded at same time, except at a depth of 1.0 foot, see Ok-1760-2, dated 6/6/62. Grass in foregound is vine mesquite, which was only slightly damaged from the foregoing inumdation. This research is under the supervision of Edd D. Rhoads, Agricultural Engineer, ARS-SWC.

Photograph of of weeping lovegrass in impoundment basin number 4 with sign at a depth of 0.5 foot, following two floodings of 10 days, during early spring (3/22-4/1/62) and mid-spring (5/3-5/13/62). Note that all grass to the right of the sign (less than 0.5 foot depth) survived and all grass to the left was killed. This research is under the supervision of Edd D. Rhoads, Agricultural Engineer, ARS-SWC.

Photograph six of six of Chickasha Lake. An inundation study by the Agricultural Experiment Station-Soil and Water Conservation Bureau [AES-SWC], in Chickasha, Oklahoma, under the direction of Edd D. Rhoades. Basin no. 6, following one flooding period of twenty days (May 4 - 24, 1964). See OK-2334-3, dated 07-08-64, for list of grasses. Severe killing of big blestem, knotroot, bristlegrass, smoothbrome, western wheatgrass, read canary grass, Virginia wildry, and Kentucky fescue occured below a 4 foot depth during this period. OK-2134-8.

Photograph five of six of Chickasha Lake. An inundation study by the Agricultural Experiment Station-Soil and Water Conservation Bureau [AES-SWC], in Chickasha, Oklahoma, under the direction of Edd D. Rhoades. Basin no. 5, following 2 periods of flooding for 20 days each (March 23 - April 12 and May 5 - 25 , 1964). See OK-2134-3, dated 07/08/64 for the list of grasses [i.e., prior photo--2019.061.B2.03454; photo 1 of 6]. Very little damage occured during the March 23 - April 12 period. Severe killing of big bluestem, knotroot bristlegrass, smoothbrome, western wheatgrass, reed canary grass, Virginia wildrye and Kentucky fescue occured below 4 foot depth during the May 5 - 25 period. OK-2134-7.

Photograph four of six of Chickasha Lake. An inundation study by the Agricultural Experiment Station-Soil and Water Conservation Bureau [AES-SWC], in Chickasha, Oklahoma, under the direction of Edd D. Rhoades. Basin no. 4, following 2 periods of flooding for 10 days each (May 4 - 14 and June 9 - 19, 1964). See OK-2134-3, dated 07/08/64 for the list of grasses [i.e., photo--2019.061.B2.03454; photo 1 of 6]. Moderate suppression of growth with partial killing of a few plants below the 4.0 depth during the May 4 - 14 flooding: big bluestem, Indian grass, knotroot bristle grass, smoothbrome, western wheat grass, reed canary grass, Virginia wildrye and Kentucky fescue. Severe killing of big bluestem, Indian grass, smoothbrome, prairie cord grass, western wheat grass, reed canary grass, Virginia wildrye and Kentucky fescue. occurred below the 4 foot depth during the June 9 - 19 flooding. OK-2134-6.

Photograph of a closeup of KR bluestem in impoundment basin number 4 at a depth of 0.5 foot, following two floodings of 10 days, during early spring (3/22-4/1/62) and mid-spring (5/3-13/62). Note that all grass to the right of the middle board (excess of 0.5 foot depth) was killed and that all grass to the left of the middle of the board (less than 0.5 foot depth) survived. This research is under the supervision of Edd D. Rhoades, Agricultural Engineer, ARS-SWC.

Photograph of a closeup of buffalograss (in front of sign) in impoundment basin number four at a depth of 1.0 foot following two floodings of 10 days during early spring (3/22-4/1/62) and mid-spring (5/3-13/62). There was no apparent damage to the grass at this depth. For view of this grass when flooded for the same duration at a depth of 1.0 foot, see Ok-1760-9 dated 6/8/62. This research is under the suervision of Edd D. Rhoades, Agricultural Engineer, ARS-swc.

Photograph of a closeup of buffalograss (in front of sign) in impoundment basin number four at a depth of 5.0 feet following two floodings of 10 days during early spring (3/22-4/1/62) and mid-spring (5/3-13/62). There was a severe suppression of growth with approximately 25 percent of the top growth killed. This grass had recovered very well at the date of this photograph. For view of this grass when flooded for the same duration at a depth of 1.0 foot, see Ok-1760-10 dated 6/8/62. This research is under the suervision of Edd D. Rhoades, Agricultural Engineer, ARS-swc.

Photograph one of six of Chickasha Lake. An inundation study by the Agricultural Experiment Station-Soil and Water Conservation Bureau [AES-SWC], in Chickasha, Oklahoma, under the direction of Edd D. Rhoades. Basin no. 1, following 3 periods of flooding for 5 days each (March 26 - 31; May 8 - 13 and June 11 - 16, 1964). Grasses include big bluestem, Kenlow switchgrass, indian grass, knotroot bristle grass, Florida paspalum, smoothbrome grass, prairie cordgrass, western wheatgrass, reed canarygrass, creek willow, Kentucky fescue, Virginia wildrye and knotgrass. The majority of grasses swuffered very little damage as a result of any one of these three floodings. OK-2134-3.

Photograph three of six of Chickasha Lake. An inundation study by the Agricultural Experiment Station-Soil and Water Conservation Bureau [AES-SWC], in Chickasha, Oklahoma, under the direction of Edd D. Rhoades. Basin no. 3, following 3 periods of flooding for 10 days each (March 23 - April 2; May 6 - 16; and June 10 - 20, 1964). See OK-2134-3, dated 07/08/64 for the list of grasses [i.e., photo--2019.061.B2.03454; photo 1 of 6]. Moderate suppression of growth with partial killing of a few plants occured during second flooding. Severe killing of indiangrass, smoothbrome, prairie cordgrass, western wheatgrass, reed canary grass and Kentucky fescue 4 foot depth during the last flooding. OK-2134-5.

Photograph two of six of Chickasha Lake. An inundation study by the Agricultural Experiment Station-Soil and Water Conservation Bureau [AES-SWC], in Chickasha, Oklahoma, under the direction of Edd D. Rhoades. Basin no. 2, following 2 periods of flooding for 5 days each (May 7 - 12 and June 10 - 15, 1964). See OK-2134-3, dated 07/08/64 for the list of grasses [i.e., photo--2019.061.B2.03454; photo 1 of 6]. Majority of all grasses survived with little or no damage. OK-2134-4.

Photograph of watermelons growing on Stephenville fine sandy loam. Nationally famous Rush Springs watermelons are grown in Southern Grady County. Yeilds may be as high as 4 tons per acre.

Photograph of a close-up of prarrie cordgrass (behind sign) in impoundment basin number 6 at a depth of 1.0 foot following two floodings for 20 days during early spring (3/21-4/10/62) and mid-spring (5/2-22/62). Very little damage to grass was observed at this depth. For a view of this grass when flooded at same time, except at a depth of 5.0 feet, see Ok-1760-1, dated 6/8/62. Grass in foregound is vine mesquite, which was apparently not damaged from the foregoing inumdation. This research is under the supervision of Edd D. Rhoads, Agricultural Engineer, ARS-SWC.

Photograph of buffalograss (in front of sign) in impoundment basin number 6 at a depth of 1.0 foot following two floodings of 20 days during early spring (3/21-4/10/62) and mid-spring (5/2-22/62). Moderate suppression of growth resulted with approximatelyt 25 percent fo top growth killed during the mid-spring flooding. All grass at this depth had recovered very well at date of this photograph. For a view of this grass when flooded at same time, except at a depth of 5.0 feet, see Ok-1760-3, dated 6/8/62. This research is under the supervision of Edd D. Rhoads, Agricultural Engineer, ARS-SWC.

Photograph of prarrie cordgrass (first grass in front of sign) in impoundment basin number 4 at a depth of 5.0 feet following two floodings of 10 days during early spring (3/22-4/1/62) and mid-spring (5/3-5/13/62). There was a moderate suppression of growth and no killing wo the prarrie cordgrass at this depth. There was no apparent damage of the vine mesquite at this depth. Alkali sacaton in the foreground was all killed. For view of these grasses when flooded for the dame duration at a depth of 1.0 foot, see Ok-1760-8, dated 6/8/62. This This research is under the supervision of Edd D. Rhoads, Agricultural Engineer, ARS-SWC.

Photograph of boating and water skiing can be enjoyed on Cobb Creek floodwater retarding structure No. 1.

Photograph of Mesquite that has been controlled by using kerosene. No new sprouts are appearing at this time. Grazing has been reduced to improve range conditions.

Photograph of mesquite that has been controlled by using kerosene. No new sprouts are appearing at this time. Grazing has been reduced to improve the range condition. OK-1159-10.