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19 Alternatives Studied

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1995 Flood in Town of Pajaro

Pajaro River Levee Reconstruction Project Alternatives

Provided by the U.S. Army Corps of Engineers (USACE), February 2006

Mainstem Alternatives

Alternative # Name of Alternative
2 100-ft levee setback, 90% non-exceedence probability for 60-year event
2a* 100-ft levee setback w/reduced vegetation in reach 2, 90% non-exceedence probability for 100-year event
2a w/bench excavation** 100-ft levee setback w/reduced vegetation in reaches 2 and 4, 90% non-exceedence probability for 100-year event
2b
100-ft levee setback, 90% non-exceedence probability for 100-year event
2c 100-ft levee setback w/bench excavation, channel widening and meander construction
2d 100-ft levee setback w/bench excavation and channel widening on alternate banks
2e 100-ft levee setback w/bench excavation and channel widening on both banks
3* 100-ft to 225-ft levee setback, 9% non-exceedence probablity for 100-year event
4 Floodwalls along existing alignment
5 Environmental corridor with 100-ft levee setback
5a Environmental corridor with 225-ft to 800-ft levee setback
5b Environmental corridor with 400-ft to 800-ft levee setback
6 Open channel bypass
7 50-ft levee setback
8 Pajaro ring levee

Tributary Alternatives

Alternative # Name of Alternative
T1* Combination of levee raise and floodwall on current alignment, 90% non-exceedence probability for 50-year event
T2
Combination of levee and floodwall with maximum 100-ft setback on one bank, 90% non-exceedence probability for 50-year event
T3* Combination of levee and floodwall with maximum 225-ft setback on one bank, 90% non-exceedence probability for 100-year event
T4**
 Combination of levee and floodwall with maximum 100-ft setback on one bank, 90% non-exceedence probability for 100-year event

* Tentative final array of alternative plans
** Tentatively recommended alternative plans