Laserfiche WebLink
<br />Table 9. - SUIDlllary of land and irrigation development requirements, <br /> Florida project <br /> Evaluation area <br /> Item Unit A B C D <br />Irrigable land Acres 7,020 9,820 1,420 1,190 <br />Dominant slopes Percent 1-3 3-6 6-10 3-6 <br />Dominant profile depth Feet 5 5 5 5 <br />Dominant irrigation method Type Corru- Corru- Corru- Corru- <br /> gation gation gation gation <br />Average farm irrigation <br />effi ci ency Percent 55 54 39 47 <br />Average maximum lengths of 26J:! <br />run Feet 645 250 450 <br />Field ditch & lateral re- <br />quired for project acreage Feet/acre 100 130 175 95 <br />Weighted average leveling <br />earthwork for project <br />acreage Cy./ac. 139 130 120 75 <br />Average level ing earthwork, <br />per acre leveled Cy./ac. 367 226 227 300 <br />Estimated average clearing <br />cost, per acre cleared Dollars 30.00 12.75 14.00 <br />Di tch structures, estimated <br />cost per acre for project <br />acreage Do 11 ars 2.37 6.40 8.96 2.55 <br /> <br />l! Includes 274 acres with irrigation runs of 330 to 660 feet due to <br />flat slopes and restricted intakes. <br /> <br />Soils of the project are generally typified by profiles which have a high <br />total water-rolding capaci ty and a generally low basic intake rate. Con- <br />siderable areas will require little or only very limited amounts of develop- <br />ment. However, while on much of the project gradients are comparatively <br />steep, lengths of run will be limited more frequently by surface undulations <br />than by slopes or profile characteristics. These factors have a material <br />effect upon good irrigation design and hence on the land and irrigation <br />development costs. Surface undulations are particularly severe on many <br />soil units in evaluation areas B and C. They markedly influence cost <br /> <br />- 20 - <br />