Photograph of "Agricultural Economists Ronnie L. Clark, WPS #1, and Aydin Altunkays, Turkey, investigate the extent of agricultural and nonagricultural properties subject to floodwater damage in the Line Creek Watershed." People shown in photo go as followed from left to right: 1. Ronnie L. Clark, WPS #1, 2. Aydin Altunkays.

Photograph of Aydin Altunkaya of Turkey and Ronnie L. Clark using an aerial photograph to determine bottomland areas, which might be subject to floodwater damages in the Line Creek Watershed. People shown in photo go as followed from left to right: 1. Aydin Altunkaya, 2. Ronnie L. Clark. The back of the photograph proclaims, "Agricultural Economists Aydin Altunkaya of Turkey and Ronnie L. Clark (right) WPS #1, determines from aerial photograph that the bottomland areas which might be subject to floodwater damages in the Line Creek Watershed."

Photograph of WPS #1 Planning Engineer, Dellas Anderson, alongside Turkish Agricultural Engineers Mete Erguder and Erdogan Bilgic checking progress in installing floodwater retarding structures for reduction of floodwater damage in Reach II of the Washita River. People shown in photo go as followed from left to right: 1. Dellas Anderson, 2. Mete Erguder, 3. Fikret Gormen. The back of the photograph proclaims, "Dellas Anderson, Planning Engineer, WPS #1, Mete Erguder and Erdogan Bilgic (left to right) Agricultural Engineers from Turkey, check progress in installing floodwater retarding structures for reduction of floodwater damage in Reach II of the Washita River."

Photograph of Ronald Rogers, WPS #1 alongside four Turkish agricultural engineers studying sedimentation problems and crop production on Line Creek. People shown in photo go as followed from left to right: 1. Erdogan Bilgic, 2. Ferit Ayla, 3. Mete Erguder, 4. Ronald Rogers, 5. Ilhan Varol. The back of the photograph proclaims, "Flood plain sedimentation and crop production are studied on Line Creek by group of specialist from Turkey. From left to right: Erdogan Bilgic, Ferit Ayla, Mete Erguder, Ronald Rogers, Ilhan Varol."

Photograph of Tom Wharton, Head WPS #1, alongside four UNIDENTIFED Turkish agricultural engineers explaining how individual farmers have tried to control flooding by straightening the channel and building levees in the Line Creek watershed. People shown in photo go as followed from left to right: 1. Ilhan Varol, 2. Tom Wharton, 3. Erdogan Bilgic, 4. Mete Erguder, 5. Ferit Ayla. The back of the photograph proclaims, "Tom Wharton (second from left), Head, Watershed Planning Staff #1, explains to a group of agricultural specialists from Turkey how individual farmers have tried to control flooding by straightening the channel and building levees in the Line Creek watershed."

Photograph of Tom Wharton, Head WPS #1, alongside three Turkish agricultural engineers posing next to a drainage pipe. People shown in photo go as followed from left to right: 1. Ilhan Varol, 2. Tom Wharton, 3. Mete Erguder, 4. Erdogan Bilgic. The back of the photograph proclaims, "Tom Wharton (second from left), Head WPS #1, explains to a group of agricultural specialists from Turkey how County Commissioners are helping with the erosion problem by replacing bridges with road fills and pipe drops."

Photograph of Tom Wharton, WPS #1 Head with Turkish agricultural engineers Erdogan Bilgic and Mete Erguder checking capacity of field drainage ditch, which drains into Tony Hollow Creek. People shown in photo go as followed from left to right: 1. Erdogan Bilgic, 2. Mete Erguder, 3. Tom Wharton. The back of the photograph proclaims, "Checking capacity of field drainage ditch. This drains into Tony Hollow Creek (Line Creek near Verden, Oklahoma.) Left to right, Turkish agricultural engineers Erdogan Bilgic and Mete Erguder with Tom Wharton, Head, WPS #1."

Photograph of WPS #1 Geologist, Ronald Rogers, explaining the relationship of bedrock geology to watershed planning to Turkish Agricultural Engineers Ferit Ayla and Ilhan Varol. People shown in photo go as followed from left to right: 1. Ferit Ayla, WPS #1, 2. Ilhan Varol, 3. Ronald Rogers. The back of the photograph proclaims, "Relationship of bedrock geology to watershed planning is explained by Ronald Rogers (right), Geologist, WPS #1, to Soil Scientist Ferit Ayla (left) and Ilhan Varol (center), Agricultural Engineer, Turkey."

Photograph of WPS #1 Hydrologist, Ray C. Riley giving instructions to Turkish Agricultural Engineers (Hydrologists) Muzaffer Acarbay and Fikret Gormen on performing a graphical routing of a floodwater retarding structure. People shown in photo go as followed from left to right: 1. Muzaffer Acarbay, 2. Ray C. Riley, 3. Fikret Gormen. The back of the photograph proclaims, "Agricultural Engineers (Hydrologists) Muzaffer Acarbay and Fikret Gormen of Turkey, performing a graphical routing of a floodwater retarding structure while Ray C. Riley (right front), Hydrologist, WPS #1, gives instructions."

Photograph of Deep Sand Savannah range site in excellent condition two years after aerial spraying for brush control. The back of the photograph proclaims, "Deep Sand Savannah range site in excellent condition two years after aerial spraying for brush control. The soil is Dougherty-Eufaula loamy fine sands."

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 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 Site 22, Rush Creek. Follow-up of OK-1240-6 taken just after completion of structure. Lake is now full. Excellent stand of Bermuda grass in spillway area and on dam. Also used for stock water.

Photograph of watershed site 22, Rush Creek. Follow-up of OK-1240-6; just after completion of structure.

Photograph of watershed site 22, Rush Creek. Follow-up of OK-1240-6; just after completion of structure. Lake is now full. Excellent stand of bermuda grass in spillway area and on dam. Also used for stockwater.

Photograph of watershed site 22, Rush Creek. Follow-up of OK-1240-6; just after completion of structure.

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 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.