DRAINAGE INVESTIGATIONS. 45 



obstructed to carry the water coming to it. The construction of 

 the recommended improvements would result in much benefit to 

 the valley. 



Lying along the Chickahominy Kiver in Hanover, New Kent, 

 Henrico, and Charles City Counties, Va., is a low, wet area contain- 

 ing about 15,000 acres, known as the Chickahominy Swamp. Under 

 present conditions these lowlands can not be cultivated with any 

 assurance of success, owing principally to overflow due to the in- 

 sufficient channel of the Chickahominy River. Under the super- 

 vision of George M. Warren a survey was made of this portion of 

 the river and its adjoining bottom land, and recommendations and 

 estimates made for increasing the capacity of the river to afford 

 protection from ordinary floods. 



DRAINAGE OF IRRIGATED LANDS. 



Some especially perplexing problems in the reclamation of seeped 

 lands have been presented in Colorado. Investigations are caiTied 

 on in that State by D. G. Miller, who examined a large number of 

 tracts in the Grand River Valley, made surveys and plans for their 

 drainage, and superintended the execution of the work. 



Drainage district No. 1, Lemhi County, Idaho, was visited by 

 R. A. Hart, who examined in detail the plans for ridding the dis- 

 trict of alkali and surplus water resulting from overirrigation, which 

 had rendered the land of the district unproductive. 



Investigations in New Mexico, begun by S. W. Cooper in 1910, 

 have been carried on by him throughout the fiscal year. Assistance 

 was given at many points in the Pecos Valley. This work consisted 

 in the study of methods employed, the planning of drainage systems, 

 and the superintendence of construction. Considerable work was 

 done in the vicinity of Dexter and Roswell, and many other points 

 were given assistance. 



Drainage investigations in the irrigated section of Texas have 

 been carried on by W. N. Hall, with headquarters at Brownsville. 

 A large number of seeped areas of various extents have been exam- 

 ined and plans worked out by him for their drainage. W. A. Kelley 

 also spent some time in the Rio Grande Valley conducting similar 

 investigations. 



Further experimental work was done in the Washington Field 

 near St. George, Utah. Drainage systems were planned by R. A. 

 Hart for a number of other tracts in that State^ among them being 

 the Robert Kirkman fami, the Storr Brothers' tract at American 

 Fork, H. P. Hemingsen's farm at Riverton, and the Jensen tract at 

 Murray. C. F. Brown and R. A. Hart worked out plans for reclaim- 

 ing the Hinckley-Deseret and Oasis tracts from seepage and alkali, 



