Ashokan Reservoir Monitoring Plan

Water Quality Monitoring Plan

(Ashokan Watershed - Release Channel Operations)

Monitoring Objective

To monitor water quality in the Lower Esopus Creek (LEC) and other locations in support of
operation of the Ashokan Release Channel

Monitoring Sites

Condition: Normal - Release Channel Not Operating (Routine monitoring conducted at
these sites, regardless of reservoir spill status)
- Upper Esopus Stream Site
  - Esopus Creek (E16i) - last sampling point prior to entry into Ashokan Reservoir
- Limnology Sites
  - Ashokan Reservoir Limnology Stations (1EA-4EA) - multiple depths in water
    column, both basins
- Keypoint Sites
  - Ashokan Upper Gatehouse - water at the east and west basin intake levels as
    follows:
    - ES - East Surface
    - EM - East Middle
    - EB - East Bottom
    - WS - West Surface
    - WM - West Middle
    - WB - West Bottom
  - Ashokan Effluent Sampling Station (EARCM) - final effluent leaving Ashokan
    via Catskill Aqueduct
Condition: Release Channel Operating - In addition to sites listed above, add these sites:
- Ashokan Release Channel (M-1) - water released through the release channel to the
  lower Esopus Creek
- Lower Esopus Stream Sites
  - Lower Esopus Creek Above Sawkill (LEC AS) - above confluence with Sawkill
    Creek
  - Lower Esopus Creek at Saugerties Beach (Saugerties Beach) - above Saugerties
    dam
Condition: Release Channel Operating & Ashokan Spilling (In addition to sites listed
above, add these sites:
- Lower Esopus Stream Sites
  - Ashokan Spill (ASP) - Ashokan Reservoir spill channel below spillway
  - Lower Esopus Creek Confluence (ASP M-1 CONF) - below confluence of
    Ashokan Reservoir release channel release flow and Ashokan Reservoir spill
    channel

Monitoring Frequency and Analytes

Condition: Normal - Release Channel Not Operating
(Routine monitoring at these sites)
Site Type	Sites	Analytes	Frequency
Upper Esopus Creek	E16i	Turbidity, temperature Total suspended solids	Weekly Monthly
Limnology	1EA-4EA	Turbidity, temperature Total suspended solids	2x/Month Monthly
Keypoints	EARCM	Turbidity, temperature Total suspended solids	5Days/Week Monthly
Keypoints	ES, EM, EB, WS, WM, WB	Turbidity, temperature	Weekly

Condition: Release Channel Operating
(In addition to sites listed above, add these sites)
Site Type	Sites	Analytes	Frequency
Keypoints	M-1	Turbidity Turbidity, temperature, total suspended solids	Weekly Monthly
Lower Esopus Creek	LEC AS, Saugerties Beach	Turbidity, temperature, total suspended solids	Weekly

Condition: Release Channel Operating & Ashokan Spilling
(In addition to sites listed above, add these sites)
Site Type	Sites	Analytes	Frequency
Lower Esopus Creek	ASP, ASP M-1 Conf	Turbidity, temperature, total suspended solids	Weekly