Wastewater TMDL Modification}
i�t. ..... City
Kali"spell
:. >< Post Office Box1 - Kalispell, Montana 5 -1 - Telephone (406) 758-7000 Fax - 5 -7 5
REPORT TO: Honorable Mayor and City Council
FROM: James H. Patrick, City Manager
SUBJECT: Total Maximum Daily Limits TMD Discussion
MEETING DATE: February 6., 2006
BACKGROUND: At the January 30 t Fifth Monday meeting, Joe Russell made a
presentation tatior on 1 D "s in Flathead County. Attached please find a copy of a presentation
made by our consultants. This will be the basis for our discussion at the work shop. Staff and
along with the City Engineer from Whitefish had are opportunity to meet with the Director o
n ror-mntal Quality on Tuesday. He assured us that the cities would have representation o
the technical advisory committee and be part of detennining an implementation play..
RECOMMENDATION: The City continues to work with D Q to insure that the
implementation plan is equally enforced on all entities contributing to the total nutrient loadings
in Flathead Lake.
FISCAL EFFECTS: Potentially significant expenditures of funds.
ALTERNATIVES: As suggested by the City Council.
Respectfully submitted,
James H. Patrick, City Manager
Nutrient Management Plan and
Total Maximum Daily Load for
Flathead Lake
David L. Clark and Craig Caprara
R Engineering, Inc.
January 23, 200
Nutrient Management Plan and Total
Maximum Daily Load for Flathead
Lake
• dater Quality
Goals/Endpoints for
Flathead Lake
No declining dissolved
oxygen in the l y olimmon
o measurable blooms o
na aena or other
pollution algae
y-- Stable or declining trend in
algal biomass on near -
shore rooks
• Water Quality Indicators
-- Primary productivity: 80
C rn2/year
— Total phosphorus: 5.0 u1
— Soluble reactive
phosphorus: < 0.5 u l
— Total nitrogen: 95 ug/l
Nitrate and nitrite nitrogen:
30 u#
Ammonia nitrogen, .
ugl
Chlorophyll a: 1.0 ug l
I
Total Maximum Daily Load Allocates
Load Reductions in 2 Phases
• Phase I: A 25 percent reduction in nutrient
loading from the core urban and agricultural
area north of the fake
— TIII[DL calls for 15 percent reduction in man -caused
nitrogen and phosphorus loads, plus a 10 percent
margin of safety
Kalispell, Whitefish, Columbia Falls, 1319fork,
Evergreen, Somors, and Creston Identified for Interim
Load Reduction Goal
Phase 11: Concurrently collect additional data
from all nutrient sources
— A final nutrient load allocation is to be made in 2006
MDEQ Currently Formulating Plans for Phase I!
Nutrient Management Plan Potential
Issues
• Water Quality Targets Are Clear
• Recognition that Point Source loadings Area Small
- Total Phosphorus -1
Total Nitrogen -2%
• roar Load Allocations Not Yet Developed
M L states that "'It is not envisioned that achieving a % toad
reduction from this single area will result i ach v r� overall
15%
wid
e e toad redwon. Rather, this is a uteri toad reductkn goal
for an area known to be an immediate threat to Flathead Lake'
• Point Source and Nonpoint Source Reduction Requirements Not Yet
Defined
TIM DL states that "The latent of this allocation approach is to begin
taking acts toward reducing pollutant toads, as descn ed above in
Phase t# white cork rren y coliecfing additional infonnatfon to Phase It.
This a di onat in orr ation will ultimately allow for fair and equitable
allocation of the total anthpoge to toad. "
2
Big#fork Sr
fathead Lake'
-
.3
22
.r" trC!
K 1R.�? bia : Wa i'
Flathead v
k
it
t
7 Kw
Kak"Spye�ll
Ashley
eyy� ee
Yf
M2,�..
130
4h`�ii yv,}yy� �
N, }}y{�
NA
Bio;ogical Station
L.S . B urea.ureaj of
. Fork
♦ K
la i t.. n
d R.
TOTALS
1500
24 7.2.
326.E
6381
u per cay.
Figure -7. Phosphorus Land by Source Category.
o
Fj
ti
. ra:
r
Agr -L-t3" ?'.#' ' 32A:le' ,,ruff; .'k i' JFwreg ,r n�j �--Vs }r :"e rf Z e 0 c : w ;r. 01
3
Figure 4-9. Total Nitrojen Load by Source Category.
�� ...........,
�\
f �
4 1
2 :
:[ \
.�
�§ !S
&