HomeMy WebLinkAboutApplication Applicant 2/27/2024City of Springfield
Development & Public Works
225 Fifth Street
Springfield, OR 97477
Floodplain Overlay District Development
SPRINOPIELD
1k
Required Project Information (Applicant: complete this section)
Applicant Name: Lane County c/o John Krolak Jr. Phone: 541-682-6966
Company: Lane County Public Works 1 Email•1ohn.krolak@lanecountyor.gov
Address: 3040 N Delta Highway, Eugene, OR, 97408
Applicant's Rep.: Lauren ZatkosPhone:
503-207-6688
Company: Wolf Water Resources
Email: Izatkos@wolfwaterresources.com
Address: 1001 SE Water Ave, 180, Portland, OR, 97214
Property owner: Same as applicant
Phone:
Company: Email:
Address:
ASSESSOR'S MAP NO: 17022000 TAX LOT Nos : Ma cola Road
Property Address:
Size of Proper : n/a Acres C■_I Square Feet ❑
Zoning: Public Land & Open Space
Existing Use: Public Road Right -of -Way
Description of If you are filling in this form by hand, please attach your proposal description to this application.
Proposal: See attached technical memo for additional information and project description.
Si natures: Please si n and print your name and date in the a ro riate box on the next nane.
Required Property information (City Intake Staff: complete this section
Associated Cases:
Case No.: I ' Z� ��^ (K��
Date:
Reviewed b t
Application Fee: 00
Technical Fee: $ ��'
Posta a Fee: $0
TOTAL FEES: $ j S0 U 0 S
PROJECT NUMBER:
Revised 3/9/22 Sandy Belson 1 of 4
Signatures
The undersigned acknowledges that the information in this application is correct and accurate.
Applicant:
KROLAK John M Digitally signed by KROLAKJohn1 M 2/9/2024
Date: 2024.02.09 10:37:31 -08'00 Date:
Owner:
Signature
John Krolak Jr.
Print
If the applicant is not the owner, the owner hereby grants permission for the applicant to act in his/her behalf.
Signature
Print
Date: 2/9/2024
Revised 3/9/22 Sandy Belson 2 of 4
Floodplain Overlay District Development Application Process
1. Applicant Submits a Floodplain Overlay District Development Application to the
Development & Public Works Department
The application must conform to the Floodplain Overlay District Development
Submittal Requirements Checklist on page 4 of this application packet.
Planning Division staff screen the submittal at the front counter to determine
whether all required items listed in the Floodplain Overlay District Development
Submittal Requirements Checklist have been submitted.
Applications missing required items will not be accepted for submittal.
2. City Staff Conduct Detailed Completeness Check
• Planning staff conduct a detailed completeness check within 30 days of submittal.
• The assigned Planner notifies the applicant in writing regarding the completeness of
the application.
• An application is not deemed complete until all information as required by SDC
3.3.435(8), including all information necessary to evaluate the proposed
development, its impacts, and its compliance with the provisions of the Springfield
Development Code and other applicable codes and statutes have been provided.
• Incomplete applications, as well as insufficient or unclear data, will delay the
application review process and may result in denial.
3. City Staff Review the Application and Issue a Decision
• Floodplain development approval is a Type I decision and thus is made without
public notice and without a public hearing since there are clear and objective
approval criteria and/or development standards that do not require the use of
discretion.
• Decisions address all the applicable approval criteria and/or development
standards.
• Applications may be approved, approved with conditions, or denied based on the
findings of fact showing compliance/non-compliance with the floodplain
development standards in SDC 3.3.430.
• The City mails the applicant and any party of standing a copy of the decision, which
is effective on the day it is mailed.
• The decision issued is the final decision of the City and may not be appealed.
4. Next Steps
• Approval of a floodplain development permit is required before construction or
development begins within any area of special flood hazard established in SDC
3.3.420(8).
Upon placement of the lowest floor of a structure (including basement) but prior to
further vertical construction, applicant must obtain documentation, prepared and
sealed by a professional licensed surveyor or engineer, certifying the elevation (in
relation to mean sea level) of the lowest floor (including basement).
Where base flood elevation data are utilized, the applicant must obtain As -built
certification of the elevation (in relation to mean sea level) of the lowest floor
(including basement) prepared and sealed by a professional licensed surveyor or
engineer, prior to the final inspection.
Revised 3/9/22 Sandy Belson 3 of 4
Floodplain Overlay District Development Submittal Requirements Checklist
NOTE: If you feel an item does not apply, please state the reason why and attach the
explanation to this form.
❑ Application Fee - refer to the Development Code Fee Schedule for the appropriate fee
calculation formula. A copy of the fee schedule is available at the Development & Public
Works Department and on the city's website. The applicable application, technology, and
postage fees are collected at the time of complete application submittal.
R Floodplain Development Application Form
El Property Ownership or Control - a copy of the deed to the property, present lease
agreement, or other evidence showing the applicant is exclusive ownership or control of
the property, or has consent of all owners to act on their behalf.
R Narrative explaining the proposal and any additional information that may have a
bearing on the action to be taken, including findings demonstrating compliance with the
Floodplain Overlay District Development Standards described in SDC 3.3.430.
R Three (3) Copies of a Plot Plan drawn to scale to include:
❑ The nature, location, dimensions, and elevations of the development area
❑ Name, location, and dimensions of all existing and proposed structures
❑ Name, location, and dimensions and amount of fill and/or excavations
❑ Name, location, and dimensions of all storage of materials
❑ Name, location, and dimensions of all drainage facilities
❑ Base flood elevation area
❑ Elevation in relation to mean sea level
❑ Of the natural grade(s) of the proposed development area (for structures, show
elevations at the corners of the proposed structures) prior to excavation or the
placement of fill
❑ Of the lowest floor (including basement) of all structures and all attendant
utilities of all new and substantially improved structures (in accordance with
SDC 3.3.425(C)(2)
❑ To which any structure has been flood -proofed
❑ Other Permits - Copies of required local, state, and federal permits
❑ Floodproofing Certification - Provide certification by a registered professional engineer
or architect licensed in the State of Oregon that flood -proofing methods for any non-
residential structure meet the flood -proofing criteria for non-residential structures in SDC
3.3.430(B)(3)(c).
0 Floodway - Certification by a registered professional engineer demonstrating through
hydrologic and hydraulic analyses performed in accordance with standard engineering
practice that proposed encroachment(s) will not result in any increase in flood levels
within the community during the occurrence of the base flood discharge (unless a CLOMR
is approved by FEMA).
Fx_1 Watercourse - Description of the extent to which any watercourse will be altered or
relocated.
R Base Flood Elevation data for subdivision proposals or other development when
required per SDC 3.3.425(C)(1) and SDC 3.3.430(A)(7)
❑ Substantial Improvement Calculation for any improvement, addition, reconstruction,
renovation, or rehabilitation of an existing structure
Revised 3/9/22 Sandy Belson 4 of 4
Hayden Bridge Seismic Retrofit Project
City of Springfield — Floodplain Overlay District Development Application
Floodplain Application Additional Information:
Application Fee — No permanent removal, fill, or development is proposed below the Base Flood
Elevation. No subdivisions or partitions are proposed.
Property Ownership or Control —A Tax Assessor's map is attached indicating that the project area is
within a public right-of-way.
Narrative —The Hayden Bridge Marcola Road Seismic Retrofit project spans the McKenzie River in
Springfield, Oregon. The bridge retrofits include placing steel tension ties and pins to connect the bridge
Spans 1 and 2, and adding new battered micropiles and concrete caps to the abutments. As shown on
sheet S01 of Attachment C, these retrofits are above and outside the FEMA 100 -year flood elevation of
470.5 NAVD88 Feet and the overall conveyance will be maintained. The temporary construction
elements on the City of Springfield side include temporary fill and scaffolding as needed to access the
piers of the bridge. Temporary fill and scaffolding used to access the piers will be removed prior to
October 31st, and the site restored to pre -project conditions.
See Attachment A, Technical Memorandum, for additional narrative, and see Attachments C and D for
the plans and dimensions of the proposed work and temporary impacts.
Other Permits —A No Permit JPA has been submitted to both the Oregon Department of State Lands
and the U.S. Army Corps of Engineers. A floodplain development permit has been submitted to Lane
County for seismic retrofit activity proposed on the east side of the bridge.
Floodproofing Certification — No new construction or conversion is proposed. The footprint and
elevation of bridge components will not be modified by the proposed seismic retrofit.
Base Flood Elevation— No subdivisions are proposed. Base flood elevation data is included in the
Technical Memorandum.
Substantial Improvement Calculation — The proposed seismic retrofit does not meet the definition of a
substantial improvement, as defined in SDC 3.3.415.
Attachments:
Attachment 1 — Technical Memo & No -Rise Analysis
Attachment 2 — Tax Assessor's Map
Attachment 3 — Site Plan
Attachment 4 — Removal/Fill Quantities
Attachment 1
Technical Memo & No -Rise Analysis
� II91.F
N ITER
RE1GI kiES
Technical Memorandum
To: Amber Bell, Planning Director— Lane County
Mark Rust, Planning Manager— City of Springfield
From: Wolf Water Resources
AJ Jones, PE
Date: January 17, 2024
Project: Hayden Bridge Marcola Road Seismic Retrofits
Subject: No -Rise Analysis and Certificate
Wolf Water Resources (W2r) was contracted by KPFF Consulting Engineers (KPFF) to provide permitting
services for the Hayden Bridge Marcola Road Seismic Retrofit project, which is sponsored by Lane
County. The County proposes to retrofit the existing Hayden Marcola Bridge so that it will remain
operational after a 9.0 magnitude Cascadia Subduction Zone Earthquake (CSZE). Hayden Bridge runs
along Marcola Road and spans the McKenzie River in Springfield, Oregon, see Figure 1 below and
Attachment A for project location. The river centerline is the Springfield city limit; consequently, the
west side of the bridge falls under the jurisdiction of the City of Springfield, and the east side is under
the jurisdiction of Lane County. The proposed bridge retrofits include placing steel tension ties and pins
to connect bridge Spans 1 and 2 and adding new battered micropiles and concrete pile caps to the
abutments. The proposed retrofits are shown on sheet S01 of Attachment A of this memo.
The bridge retrofit project is proposed to begin in April 2024 and end by March 2025, with the majority
of work taking place during the summer work period of June through November and any temporary
access features below the Base Flood elevation shall be removed prior to October 31St
Hayden Bridge No -Rise Analysis and Certificate
Wolf Water Resources Page 1 of 9
Figure 1. Project location showing preliminary FEMA FIRM map with the extents of the 1% exceedance flood in
NGVD29.
Summary of Temporary Construction Actions & Impacts
City of Springfield — West Side of Bridge
Temporary construction activities on the top bank of the north-west side of the bridge include
construction of a temporary access road with a buried storm water drainage pipe in the existing ditch.
To construct the temporary access road, the,Contractor will use a backhoe and dump truck and other
miscellaneous minor grading equipment to clear vegetation and trees from the existing ditch. Subgrade
geotextile and/or geogrid will then be laid over the exposed ground. A temporary storm pipe will be
installed at the bottom of the existing ditch and buried with aggregate base, stone embankment or
other granular material up to finished grade. A temporary riprap basin will be constructed at the pipe
outfall to receive runoff from the pipe before flowing toward the river. To minimize impacts, the
Contractor will lay the temporary access road on an alignment that follows the existing ditch. As shown
in Figure 2, the temporary fill below the Base Flood elevation (BFE) for the access road including the rock
and storm pipe is 15.0 cubic yards. In addition to the temporary access road, temporary access
scaffolding and work access platforms that suspend from the bridge may be constructed as shown in the
attached Project Plans. The estimated temporary fill below the BFE for the scaffolding and work access
platforms is 10.0 cubic yards, for a total temporary fill estimate of 25.0 cubic yards on the west side.
Hayden Bridge No -Rise Analysis and Certificate
Wolf Water Resources Page 2 of 9
2�url.E
OITEM.
1ES01 IfE.)
Following the construction work period of approximately 8 to 12 weeks, the Contractor will remove all
imported material and piping and restore the ground to original contours with native permanent
seeding. Temporary fill and scaffolding used to access the piers shall be removed prior to October 31st.
Figure 2. Temporary construction access road on the west side of the bridge (City of Springfield).
Lane County — East Side of Bridge
The temporary construction elements on the east side include scaffolding as needed to access the piers
of the bridge. The estimated temporary fill below the BFE for the scaffolding and work access platforms
on the east side of the bridge is 8.0 cubic yards. Temporary scaffolding used to access the piers will be
removed prior to October 31st, and the site will be restored to pre -project conditions.
Regulatory Requirements
The McKenzie River at the Hayden Bridge crossing is located within a Special Flood Hazard area identified by the
effective 1999 FEMA Flood Insurance Rate Map (FIRM) as Zone AE Regulatory Floodway with established base
flood water surface elevations (Figure 3). Lane County updated preliminary effective flood hazard areas for this
location in 2022 (Figure 1). The 2022 regulatory base flood elevation is report as 466.9 NVG29, which converts to
470.5 NAVD88. Since the bridge is located within Lane County on the east bank and the City of Springfield on the
west bank, the proposed bridge retrofits will be assessed and designed to be compliant with both Lane County and
City of Springfield Zoning.
Lane County regulates actions within the regulatory floodway in Section 16.244 of the Lane County Code. The
following provisions apply from Section 16.244(5)(b)(iv)(aa):
Hayden Bridge No -Rise Analysis and Certificate
Wolf Water Resources Page 3 of 9
Nfll,F
WITH
�E�or�cl:s
The following encroachments may be permitted if certification by a registered
professional civil engineer is provided demonstrating through hydrologic and hydraulic
analyses preformed in accordance with standard engineering practice that the proposed
encroachment will not result in an increase in flood levels within the community during
the occurrence of the base flood discharge... (D) The construction, maintenance,
preservation, repair and replacement of a public road and ancillary facilities, including
bridges.
City of Springfield development standards section 3.3-420(B)(4) states the following:
Floodways. Located within areas of special flood hazard established in Section 3.3-410A. and B.
are areas designated as floodways. Since the floodway is an extremely hazardous area due to
the velocity of flood waters which carry debris, potential projectiles, and erosion potential, the
following provisions apply:
(a) Encroachments, including fill, new construction, substantial improvements, and
other development is prohibited unless:
is Certification by a registered professional civil engineer is provided
demonstrating through hydrologic and hydraulic analyses performed in
accordance with standard engineering practice that the proposed
encroachment shall not result in anv increase in flood levels within the
community during the occurrence of the base flood discharge occurrence of
the base flood discharge.
Figure 3. Effective FEMA FIRM map 41039C1154F showing the extents of the 1% exceedance flood in NGVD29.
Hayden Bridge No -Rise Analysis and Certificate
Wolf Water Resources Page 4 of 9
2 nal.►�
n_►TE1
IIES61 VES
No Rise Analysis
The permanent project elements are located either outside of the base flood inundation extents shown
in the effective FEMA FIRM (micropiles and pile caps) or above the base flood elevation (steel tension
ties and shear lugs); thus, these elements will have no effect on base flood water levels.
However, the temporary summer construction activities are located within the base flood extents.
Therefore, the project is subject to City of Springfield and Lane County Code requiring a No -Rise
Certification and supporting evaluation that, at a minimum, demonstrates that encroachments do not
result in any increase in flood levels during the base flood discharge. This memo is intended to
demonstrate that temporary summer construction activities will not cause a rise in base flood
elevations.
Hydrology
Flow -duration statistics were developed using USGS StreamStats for the planned construction work
period of June through November. No work is being performed below Ordinary High Water (elevation
459.5 Feet NAVD 88), so the Oregon Department of Fish and Wildlife (ODFW) in -water work window
does not apply. However, the contractor will be required to remove all temporary construction fill or
scaffolding below the Base Flood elevation before October 311t per the Lane County and City of
Springfield Floodplain Permits.
The highest flows (5% exceedance flows) during the work period are expected to be less than 10,500
cubic foot per second (cfs) as shown in Table 1. The monthly 5% exceedance is the probability that a
certain value will equal or be exceeded one to two days a month. For June, it is expected that one to two
days of the month will have a flow rate of 10,500 cfs, and that the remaining days of the month will not
exceed this flow rate. For comparison, Table 2 shows peak flows evaluated using USGS StreamStats
(2024), with 2 -year flows estimated to be 46,000 cfs and the 100 -year base flood is estimated as 134,000
cfs. Thus, the June 5% exceedance flow of approximately 10,500 cfs and the early fall flows in October of
8,110 cfs are relatively small — less than a quarter of the 2 -year peak flow, suggesting that water levels
during the work period are typically much lower than those of the Base Flood.
In addition, the USGS stream gauge (1416400) on the McKenzie River just upstream of the Hayden
Bridge started tracking discharge in 2007. Table 3 shows that peak flows at the bridge in the last 17
years did not exceed 47,500 cfs, and no peak flow events happened during the work window from June
to October. Based on the recent annual peak flows and estimated discharge for the highest probable
flows there is little to no potential occurrence of the base flood discharge during the construction time
frame.
Table 1 Monthly Mean Flow Duration Statistics (CFS) for the McKenzie River During the Work Period.
June 10,500 7,780 5,400 3,460 1,540
July 3,980 3,110 2,200 1,490 920
Hayden Bridge No -Rise Analysis and Certificate
Wolf Water Resources • Page 5 of 9
1101'
N-.ITEk
1160110ES
August 1,840 1,570 1,150 923 711
September 3,260 2,270 1,400 905 753
October 8,110 5,620 2,960 1,480 1,160
Table 2 Peak Flow Estimates (CFS) for the McKenzie River at Hayden Bridge.
2 -year
0.5
46,000
5 -year
0.2
67,600
10 -year
0.1
83,000
25 -year
0.04
102,000
50 -year
0.02
118,000
100 -year
0.01
134,000
500 -year
0.002
174,000
Table 3 Annual Peak Flows (CFS) at USGS Gauge 14164900 McKenzie River at Hayden Bridge.
2007
Dec. 14, 2006
26,300
2008
Dec. 24, 2007
19,800
2009
Dec. 29, 2008
32,300
2010
Jun. 04, 2010
22,300
2011
Jan. 17, 2011
47,500
2012
Jan. 25, 2012
32,200
2013
Dec. 05, 2012
26,800
2014
Feb. 14, 2014
30,900
2015
Dec. 22, 2014
35,900
Hayden Bridge No -Rise Analysis and Certificate
Wolf Water Resources Page 6 of 9
� uol.I
0ITEk
IESII Ills
2016
Dec. 18, 2015
29,900
2017
Mar. 10, 2017
23,000
2018
Nov. 24, 2017
21,200
2019
Apr. 09, 2019
40,600
2020
Jan. 29, 2020
19,300
2021
Dec. 21, 2020
23,000
2022
May 7, 2022
20,900
2023
Dec. 28, 2022
15,300
Conclusions
Analysis show that this project meets the objectives of the Lane County zoning code and City of
Springfield development standards. The earthworks for the project proposed actions are temporary and
minor in the context of the broader McKenzie River; further, the temporary fill will be during the
summer and fall when flows are relatively low, and they will be removed prior to the winter.
This No -Rise analysis shows the project to be compliant with Lane County and City of Springfield codes
by context of the following:
• There is no permanent fill in the floodplain. The retrofits are above and outside the FEMA 100 -
year flood elevation of 470.5 NAVD88 Feet and the overall conveyance will be maintained.
• Temporary construction activities will be completed during relatively low flows.
• All temporary construction work elements will be removed in their entirety prior to the
potential occurrence of the base flood discharge.
As a contingency we recommend the contractor track the gage height at the USGS Gauge 14164900 and
if the water levels are approaching the Base Flood elevation, they are required to remove any temporary
scaffolding and fill below elevation 470.5 NAVD88.
References
FEMA ESRI. (2020). Lane County, Oregon (Coast Fork and Middle Fork Willamette River) - Flood Map
Comparison (Effective vs. Preliminary), Eugene, OR. Retrieved from fema.maps.arcgis.com:
http://fema.maps.arcgis.comlappsZStorytellingSwipe/index.htm l?app id=5a4cObf286604b5e9bc73lef8l
73f039#
FEMA FIS. (2020). FEMA Flood Map Service Center. Retrieved from fema.gov:
https://msc.fema.gov/arcgis/rest/directories/arcigislobs/nfhl printlmscprintb server 'd8f61c847b8f4
95b9594f58773a4f165 scratch FIRMETTE baa3126c-ac46-4a5e-8a74-86dd5c91adc7. df
Hayden Bridge No -Rise Analysis and Certificate
Wolf Water Resources • Page 7 of 9
11111.E
' WATER
ILSIDIVES
USGS. (2024). USGS 14164900 Mckenzie River abv Hayden Br, at Springfield,OR. Retrieved from
htt s: nwis.waterdata.us s. oy or nwis )eak?site no=14164900&agency cd=USGS&format=html
USGS StreamStats. (2024). U.S. Geological Survey, 2016, The StreamStats program for Oregon, online at:
https://streamstats.uses.gov/ss/, accessed on (01/16/2024).
Hayden Bridge No -Rise Analysis and Certificate
Wolf Water Resources Page 8 of 9
2 nn.E
wArER
IES01 ICES
Engineering Certification of No Adverse Flood Risk Effects
This is to certify that I am a duly qualified engineer licensed to practice in the State of Oregon. It is to
further certify that the attached technical data supports the fact that the proposed temporary
earthworks described above will not create any measurable increase to the base flood elevations to the
McKenzie River. The proposed permanent bridge retrofits are above the Base Flood elevation and will
not create any increase to the base flood elevations upstream or downstream of the project.
�1 4MX4___ 01/17/2024
Signature VDate
Water Resources Engineer 84779PE
Title License No
PR�F�
ar 84779PE,
-��
\:Z, 4, 8, 4ptiM
Renews: 6/30/2025
Hayden Bridge No -Rise Analysis and Certificate
Wolf Water Resources • Page 9 of 9
Attachment 2
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