Reservoir Consultant's Report

Options Summary

The options from the February 2000 report (section 5.5) are extracted and summarized below. The most recent recommendations (September 2000) are to both keep the Reservoir at its lowest level and also to remove trees from along the dam - an Option 3.  Discussions are still ongoing about the specifics of such a plan (10/26/00).

Reservoir Dam Options from the Consultant's Report

 

Option 1

Option 2

Option 3

Option 3

Option 4

Description

Do nothing.

Comply with MADEM.

Limited Repairs with O&M Plan

Limited Repairs with O&M Plan Isolate Swim Area

Minimal Repairs Isolate Swim Area

Design Flood

none

1/2 PMF

500 Yr.

500 Yr.

500 Yr.

Reservoir Height Above mean sea level

159' / 153' (lower pre-storm)

159' / 153' (lower pre-storm)

159' / 153' (lower pre-storm)

153' only

153' only

Trees (on dam top)

Nothing

Remove

Remove

Remove

Keep

Dam Top

Nothing

Raise several feet.

Repair

Repair

Nothing

Upstream Slope

Stabilize

Stabilize

Stabilize

Stabilize

Repair

Downstream Slope

Nothing

Stabilize

Stabilize

Stabilize

Repair

Spillway

Nothing

Expand to 180'

Repair

Repair

Repair

Downstream Channel

Nothing

Clean

Clean

Clean

Clean

Swimming Area

Unchanged

Unchanged

Unchanged

Isolated & Sealed

Isolated & Sealed

Monitoring Program

Yes

Yes

Yes

Yes

Yes

Emergency Plan

Yes

Yes

Yes

Yes

Yes

O&M Plan

Yes

Yes

Yes

Yes

Yes

Monitor & Control Seepage

Yes

Yes

Yes

Yes

Yes

Estimated Cost - Dam Only *

$150,000 *

$586,000 *

$328,000 *

$328,000 *

$160,000 *

* Does not include permit or design costs, or restorative landscaping, or beach isolation.

Liability

High

Lowest

Mid

Low

Mid

 

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