Meeting

Presentations & Meeting Summary

April 13, 2015

1:30 p.m., FWP Conference Room, Kalispell

DEQ held a kick-off meeting to discuss the development of nutrient standards for Flathead Lake.

Draft April 13, 2015 Presentation by Michael Suplee (5.44 MB)

Technical data and materials for this meeting can be found in the “Documents” table below. You may either download a zip file containing all of the files , or download each file individually.

Meeting Summary

May 24, 2016

1:30 p.m., CSKT Natural Resources Department, Polson

DEQ held a meeting to continue discussions of appropriate nutrient criteria to adopt for Flathead Lake.

Meeting Agenda

Marc Lorenzen Presentation (1.16 MB) 

Marc Lorenzen gave a presentation regarding the relationships between chlorophyll a, suspended solids, secchi depth, and lake clarity. 

Shawn Devlin Presentation (2.49 MB)

Shawn Devlin, a researcher with the Flathead Lake Biological Station, gave a presentation regarding the status of their Flathead Lake model: it's inputs, outputs, and timeline for completion. 

A meeting summary will be available soon.

File

File Description

Date Posted

FlatheadLake_AvgAnnual_ALL.xlsx (<0.1 MB)

Compilation of key average annual data points for Flathead Lake (from Midlake Deep) which DEQ located or calculated

4/7/15

FlatheadSecchi_WY1978-87.xlsx (~0.1 MB)

FlatheadSecchi_EPAdata_WY1991-2011.xlsx (~0.3 MB)

Flathead_WY1975_EPAdata.xlsx (< 0.1 MB)

DEQ’s annual average calculations derived from older secchi depth data

4/7/15

Secchi78-87.tif (~0.2 MB)

Picture file showing graph from which secchi depth data were extracted

4/7/15

FlatheadChla_WY85-96.xlsx (< 0.1 MB)

Annual average calculations derived from older Midlake Deep phytoplankton chlorophyll a data

4/7/15

Chlorophylla85-96.tif (~0.5 MB)

Picture file showing the graph from which the chlorophyll a data were extracted

4/7/15

MidLakeDeep_ExceedenceCalc.xlsx (<0.1 MB)

A MS Excel spreadsheet that can be used to calculate the allowable exceedance rate for several different potential lake standards

4/7/15

Models_Chla_TP_Secchi_Carlson.xlsx (< 0.1 MB)

A MS Excel file containing various empirical models which can be used to predict lake chlorophyll a, secchi depth, etc.

4/7/15

DEQ Contact

Role

Email

Phone

Michael Suplee

Flathead Lake Nutrient Water Quality Standards Development

MSuplee@mt.gov

(406) 444-0831

Christina Staten

TMDL Project Coordinator

CStaten@mt.gov

(406) 444-2836

Myla Kelly

Water Quality Standards Section Supervisor

MKelly2@mt.gov

(406) 457-3639