Tatle 9, --Number, type, and loiation of engineering projects reviewed in fiscal year 1965, 

 exclusive of seismographic and Gulf cf Mexico operations 



Figure 36. — Map showing various proposed plans of 

 improvement on the lower Colorado River, Tex. 



Nine plans under consideration to develop 

 the lower Colorado River area provide for 

 various combinations of separate and com- 

 bined flood release and navigation channels 

 (fig. 36). 



Plan "A" consists of a new flood discharge 

 channel emptying into eastern Matagorda Bay 

 about 10,000 ft. downstream from the Gulf 

 Intracoastal Waterway and a diversion dam 



across the present flood discharge channel 

 (Colorado River Channel). Navigation im- 

 provement is not included. 



Plan "B" consists of a new flood dis- 

 charge channel to the west paralleling the 

 present flood discharge channel and in- 

 cludes continuous spoil embankments on both 

 sides. Navigation improvements are not in- 

 cluded. 



Plan "C" would improve the present flood 

 discharge channel by raising the west and east 

 banks of the Colorado River through spoil 

 deposition. 



Plan "D" consists of all features of Plan 

 "C" plus a jettied entrance channel in the 

 Gulf of Mexico. 



Plan "E" consists of the flood control 

 improvements of Plan "A" plus the improve- 

 ment of the present Colorado River Channel 

 for navigation. A jettied entrance as in Plan 

 "D" and a slight realignment of the channel 

 for navigation from about 5,000 ft. below the 

 Gulf Intracoastal Waterway to the Waterway 

 is also included. 



Plan "F" consists of the combination of 

 the flood control features of Plan "B" and 

 navigation improvements of Plan "E". 



Plan "G" consists of existing channel im- 

 provements as in Plan "C" for flood control 

 with a new navigation channel east and parallel 

 to the present channel. Continuous spoil banks 

 on both sides of the new channel would 

 separate it from east Matagorda Bay on 

 the east and from the Colorado River on the 

 west. 



Plan "H" consists of improving the existing 

 flood discharge channel for navigation along 

 its present alignment and includes the jettied 

 entrance channel and plugging openings into 

 eastern Matagorda Bay. 



Plan "1" consists of the new navigation 

 channel of Plan "G" with no improvements 

 for flood control. 



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