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1437 SOUTH BOULDER AVE., SUITE 1080 TULSA, OKLAHOMA 74119 918.392.5620 (P) 918.392.5621 (F) WWW.MESHEKENGR.COM
Garnett Regional Detention Facility:
A Success Story In Managing NAI With Competing Interests
Brandon Claborn, P.E., CFM
CIT
Y O
F O
WA
SS
O, O
K Location – 11 Miles Northeast of
Tulsa, OK
Population– 1990 – 11,151
– 2000 – 18,502
– 2008 – 37,328
Recent Development– 2400 Residential Lots 2002-2009
– Annual Retail Sales:
– $200 Million in 2000
– $550 Million in 2007
RA
NC
H C
REEK
BA
SIN
DR
AIN
AG
E B
AS
IN Ranch Creek – Tributary A
344 Acres to Proposed Pond
19
94
1994
20
02
2002
20
04
2004
20
06
2006
20
08
2008
EX
ISTIN
G P
RO
BLEM
S Flooding Downstream of Site
GO
ALS
FO
R D
ETEN
TIO
N Reduce Flooding Downstream
Full Development Upstream
Remove Some Existing Ponds
Sell City Owned Property
Protect Wildlife Habitat
Enhance Quality of Life
CO
MP
TETIN
G IN
TER
ES
TS
Development versus Mitigation
USACOE versus OKDEQ & EPA
Construction Costs: Developer/City
Park versus Flood Control
Maintenance versus Wetland/Habitat
DEV
ELO
PM
EN
T
PR
ESS
UR
E 118 Acres of Undeveloped Property
FLO
OD
PLA
IN M
ITIG
ATIO
N Additional Competing Interests
More Frequent versus Less Frequent Floods
Frequency Existing Proposed Reduction1 169 160 6%2 270 210 22%5 480 295 39%10 590 330 44%25 750 390 48%50 845 815 4%100 960 745 22%500 1425 1390 2%
40%PMF 3800 3455 9%
Peak Flow Rate (cfs)
PER
MIT
TIN
G IS
SU
ES
CLOMR
404 Permit– On Site Meeting Prior to Design
– Second On Site Meeting – Initial Design
Individual 404 Permit Application– 100% On Site Mitigation
– 4:1 Ratio for Overall Wetland Habitat
401 Certification (OKDEQ)– Required Additional Off Site Mitigation
Cultural Resources Investigation
Oklahoma Historical Society
CO
NS
TR
UC
TIO
N C
OS
TS
Sell Existing Detention Facilities
Fee In Lieu of Detention
Additional City Planning Required
Negotiate Purchase of Property
GEN
ER
AL S
ITE IS
SU
ES
Neighborhood Meeting
Public Meeting During Design Phase– Local Residents Expectations
Coordination With City Departments– Upgrade Sanitary Sewer
– Maintenance Access
– Security (Police)
– Stormwater Quality
SU
MM
AR
Y/R
EC
OM
MEN
DATIO
NS
Floodplain Management – Developing With No Adverse Impact
– One Piece of the Puzzle
– Reducing Flooding Is the Easy Part
– Several Competing Interests
– Coordinate City Departments
– Comprehensive Planning Is Crucial
– Leverage Resources
– Work With Developers
– Identify Permitting Needs Early
1437 SOUTH BOULDER AVE., SUITE 1080 TULSA, OKLAHOMA 74119 918.392.5620 (P) 918.392.5621 (F) WWW.MESHEKENGR.COM
Questions?
Brandon Claborn, P.E. CFMProject Manager/Associate Principal
