HomeMy WebLinkAbout16- RFP Submission - Allied Engineering - FEMA Floodplain Appeal
Proposal to Provide
Professional Services for the
FEMA Floodplain Appeal &
Mill Ditch Flood Hazard
Mitigation Evaluation
Prepared By:
Allied Engineering
In Conjunction With:
WEST Consultants
Oct. 21, 2016City of Bozeman, Montana
32 Discovery Drive . Bozeman, Montana 59718 . Ph: (406) 582-0221 . Fax: (406) 582-5770
www.alliedengineering.com
1.0 Project Understanding and Approach
2.0 Proposed Work Plan
2.1 Scope of Work
2.2 Deliverables
2.3 Schedule
2.4 Personnel Expected to Perform each Major Task
2.5 Prior Work History of Consultant and Sub-consultant
2.6 Anticipated Involvement of COB Staff
3.0 Qualifi cations
3.1 Firm Profi les
3.2 Project Team Individuals
3.3 Project Team Organization
3.4 Availability of Project Team Members
3.5 Recent Experience of Project Team on Similar Projects
4.0 References
5.0 Non-Discrimination Affi rmation Form
1
2
2
5
6
6
6
6
8
8
8
9
10
10
12
12
Appendix A - Resumes for Key Personnel
Appendix B - Selected Project Descriptions
Appendix C - Non-Discrimination Affi rmation Form
FEMA Floodplain Appeal & Mill Ditch
Flood Hazard Mitigation Evaluation
Proposal to Provide Professional Engineering Services
Prepared for:
Brian Heaston, PE
City of Bozeman - Engineering
PO Box 1230
Bozeman, MT 59771-1230
Submitted to:
City Clerk, City of Bozeman
121 North Rouse Avenue, Suite 202
Bozeman, Montana 59715
Contact Information
Paul Sanford, PE, MSCE, CFM
psanford@alliedengineering.com
Allied Engineering Services, Inc.
32 Discovery Drive
Bozeman, MT 59718
Ph: (406) 582-0221
Fax: (406) 582-5770
www.alliedengineering.com
Bozeman, Montana
Table of Contents
Section Page
Appendices
32 Discovery Drive . Bozeman, Montana 59718 . Ph: (406) 582-0221 . Fax: (406) 582-5770
www.alliedengineering.com
1
1.0 Project Understanding and Approach
Allied Engineering Services, Inc. (AESI) and team are prepared to complete the FEMA Floodplain Appeal and Mill Ditch Flood
Hazard Mitigation Evaluation project. AESI’s previous fl oodplain work within the City of Bozeman and the team’s extensive
hydraulic modeling experience make the team capable and qualifi ed to complete the proposed scope of work. We are excited
about this opportunity and, as a local fi rm, hope to contribute to improved fl oodplain management in the Bozeman community.
The Bozeman Creek and Tributaries Floodplain Mapping Project is being completed by Michael Baker International for the Federal
Emergency Management Agency (FEMA) and is currently undergoing review and evaluation by the City of Bozeman prior to
implementation. The Bozeman Creek and Tributaries project aims to update fl oodplain mapping for the area using one-dimensional
hydraulic modeling with the Army Corps of Engineer’s HEC-RAS computer program and updated elevation data. Large scale
fl oodplain mapping was last completed for the Bozeman area in 1988 with a digital conversion of the data occurring in 2011.
In July 2016, AESI completed a Floodplain Evaluation report for the City of Bozeman
which provided select review and evaluation of the Bozeman Creek and Tributaries
Floodplain Mapping Project. The work included the following major tasks:
1. General Model Review for Bozeman Creek;
2. Mill Ditch Diversion Evaluation. Evaluate eff ect of increasing fl ow to Mill
Ditch;
3. Creekside Park Evaluation. Evaluate accuracy of model at Creekside Park
and evaluate fl oodplain impacts for potential stream enhancement at the site;
4. Bond Street Bridge Evaluation. Complete a survey of Bond Street Bridge,
revise the hydraulic model to incorporate the bridge, and evaluate the bridge’s
eff ect on fl oodplain elevations and inundation extents; and
5. Evaluate incorporating the two-dimensional modeling capabilities of HEC-RAS into the section of Bozeman Creek from
Olive Street to Lamme Street.
The current objectives of the project expand on the July 2016 work and include:
1. Develop a 1D/2D or 2D hydraulic model of the downtown area and incorporate into the preliminary FIS model and
mapping;
2. Incorporate the Bond Street Bridge into the preliminary FIS model and mapping;
3. Develop an appeal package to submit to FEMA; and
4. Evaluate the Mill Ditch as a fl ood bypass channel such that the fl ow remaining in Bozeman Creek downstream of the Mill
Ditch split fl ow results in bankfull fl ow or less in Bozeman Creek.
Objective 1 of the current scope of work stems from AESI’s fi ndings during the general model review and the development of a
preliminary 1D/2D model of the downtown area in summer 2016. The general model review found some potential weaknesses
in the original 1D model. The preliminary 1D/2D model generally showed more widespread and shallow fl ooding which indicates
that the 1D model may not be adequately representing split fl ow areas. Additionally, AESI questions the applicability of HEC-
RAS’s standard bridge modeling approach to the bridges of downtown Bozeman. The bridges (which could also reasonably be
described as culverts) in the downtown area convey water underground for large stretches (sometimes several hundred feet), and
this invalidates some of the assumptions made for overtopping bridge fl ow. Flow overtopping the bridges in the downtown area
often splits from the main underground conveyance reach and is conveyed down streets. The current 1D model does not appear
to represent this phenomenon.
Currently, HEC-RAS 2D cannot handle bridges and recommends using culverts to represent bridges in 2D areas. However,
HEC-RAS 2D can only model culverts if the inlet and outlet of the culvert exist at adjacent cells. This creates an issue for long
culverts. The preliminary combined 1D/2D model was originally developed as a way to handle the exceptionally long bridges while
still representing the overbanks as 2D areas. A new work-around has recently been discovered that allows long culverts to be
Proposal Narrative
32 Discovery Drive . Bozeman, Montana 59718 . Ph: (406) 582-0221 . Fax: (406) 582-5770
www.alliedengineering.com
2
represented in 2D models. AESI would like to discuss with FEMA the possibility of using the new methodology so that a purely 2D
domain could be applied. A completely 2D model has some advantages over a 1D/2D model setup including increased stability
and better model continuity. Additionally, we believe that a completely 2D domain would better represent fl ow leaving the channel
at the bridges.
If the new methodology for long culverts is rejected by FEMA, AESI is ready and capable to enhance the preliminary 1D/2D model
to appeal level. A review of the model has already been completed by West Consultants, and strategies have been discussed to
fi x any current problem areas.
AESI acknowledges that while a 2D model will likely better represent the
100-year event in downtown Bozeman, there may be some issues in regards
to regulating to the 2D model. 2D modeling is somewhat new territory in
the fl oodplain world, and FEMA has only provided limited guidance in its
utilization for community fl oodplain regulation. AESI anticipates several
conversations with FEMA in order to produce a model that works from a
regulatory perspective, especially when it comes to the fl oodway. Floodway
analyses are challenging within a 1D format and can be extremely diffi cult
in a 2D domain. Several options exist for approaching the 2D fl oodway
analysis. One approach may involve adding cross-sections to the model and
using average water surface elevations at the cross-sections to assess rises
from encroachments. Equal conveyance reductions at the specifi ed cross-
sections would be used to place encroachments. Alternatively, the 2D model could be used to create a more accurate 1D model
(in eff ect, a quasi-2D model) that could then be used for regulatory purposes. Moving forward, AESI, DNRC, the City of Bozeman,
and FEMA will need to choose an option that is usable to property owners pursuing fl oodplain work in the downtown area. No-Rise
Analyses and CLOMR/LOMR work will require a modifi able model that can be easily reviewed by government agencies.
The other objectives of the project are generally straight forward and can be completed with modifi cations to the existing preliminary
1D model. The Bond Street Bridge analysis is near completion from the previous July 2016 work but will be refi ned and further
reviewed for the appeal submittal to FEMA. We will expand on the previous work completed for the Mill Ditch Diversion to
determine the capacity and ditch geometry required to alleviate fl ooding from the estimated 100-year event on Bozeman Creek.
Bank-full capacity will fi rst be determined in the newly developed Bozeman Creek model, and the fl ow in excess of the estimated
100-year event will then be applied to Mill Ditch. An initial estimation of channel geometry will be made based on normal depth
assumptions. The channel will then be iteratively adjusted to handle the fl ow. Since Mill Ditch has recreational value within the
community, channel modifi cations will also consider aesthetics. AESI will work with the City of Bozeman to determine a desired
channel shape. An added fl oodplain may take priority versus channel widening to retain a more natural appearance.
2.0 Proposed Work Plan
2.1 Scope of Work
AESI has completed a detailed scope of work required to complete the outlined tasks. Below, we off er task items and descriptions
necessary to complete an appeal to FEMA and analyze the Mill Ditch Diversion for fl ood relief.
Project Management
Internal Project Management
Manage the project and AESI staff .
Administration
Prepare invoices. Provide project setup. Assist with preparation of deliverables.
Communication with Stakeholders
Communicate with client, FEMA, DNRC, and other stakeholders.
Proposal Narrative
32 Discovery Drive . Bozeman, Montana 59718 . Ph: (406) 582-0221 . Fax: (406) 582-5770
www.alliedengineering.com
3
Conference Calls
Project Manager and Hydraulic Engineer attend up to two conference calls with stakeholders.
Data Collection
Site Visit
Project team performs a site visit to evaluate the existing conditions in the downtown model reach. Document the observed fi eld
conditions with notes and ground photographs.
Survey to Refi ne Lateral Weirs and Flow Splits
Perform survey to establish detailed location and profi le of proposed lateral weir fl ow splits.
Obtain Record Drawings & Incorporate New Town Pump Culvert into Mill Ditch Diversion Model
Obtain record drawings (and any relevant fl oodplain development permit application information) from City for the recently installed
culvert that conveys Mill Ditch under the Town Pump site. Incorporate culvert into Mill Ditch Diversion hydraulic model.
Floodplain Modeling
Incorporate 1D / 2D or 2D Model in Downtown Area into Preliminary FIS
Develop Layout for Revised Hydraulic Analysis
Work with stakeholders to develop a proposed schematic layout for the 1D/2D or 2D hydraulic model. Summarize proposed
layout and methodologies in a memorandum and provide to FEMA for review/approval. The memorandum will discuss proposed
methodologies including but not limited to: selection of a 1D/2D or 2D model; split fl ows; lateral weirs; Manning’s n; fl oodway
determination; hydraulic structures; and annotation of FIRM, Flood Profi les, and FIS Report Tables.
Develop Hydraulic Model
Revise the preliminary FIS hydraulic model to incorporate a 1D/2D or 2D hydraulic model in the downtown area. Preliminary
analysis by AESI used a 1D/2D model setup, but a methodology recently uncovered for modeling long culverts (like those that exist
downtown) in a purely 2D environment will be evaluated. Discussions with FEMA will need to take place regarding the acceptance
of any methodologies employed. If a 1D/2D model is pursued, the preliminary model will need to be refi ned and updated. Levee
stations will need to be better defi ned and some overtopping culvert/bridge areas need revision to better mimic existing conditions.
Additionally, general model parameters will need to be refi ned based on sensitivity simulation trials.
Provide the hydraulic model to stakeholders for review prior to developing the fl oodway model (below).
Develop Floodway Model
Develop fl oodway boundaries within the 1D/2D hydraulic model or 2D model. A fi rst cut evaluation will utilize the encroachment
stations in the preliminary FIS 1D model into the 2D model to verify that the maximum allowable surcharge is not exceeded.
Limited guidance is off ered by FEMA for fl oodway analysis in 2D models, but there are several options available. One likely
method is to check conveyance reductions and surcharges at established 1D cross-sections extended into the 2D area. The model
would still be run in a 1D/2D or 2D environment and require an iterative approach with manually adjusted encroachments. An
average water depth rise may be employed to prevent problems caused by one or two individual cells showing larger than allowed
surcharges. Any option pursued will need prior acceptance by FEMA. It is anticipated that inundation results from the fl oodplain
extents model will infl uence how to proceed with the fl oodway analysis. Split fl ows down streets may require separate fl oodways.
Close communication with the Client and FEMA and several iterations are expected throughout the development of the 1D/2D or
2D fl oodway model.
Develop Explanation for Superiority of Alternative Methodology
Develop text to demonstrate that the 1D/2D or 2D modeling approach results in more accurate estimates of fl ood hazard
determinations in the downtown area.
Proposal Narrative
32 Discovery Drive . Bozeman, Montana 59718 . Ph: (406) 582-0221 . Fax: (406) 582-5770
www.alliedengineering.com
4
Meeting with Stakeholders to Review Preliminary Model Results
Meet with stakeholders to review the preliminary model results (1D/2D (or 2D) and Bond Street Bridge). Evaluate the benefi ts
and risks with moving forward with an appeal. Develop a brief memorandum to summarize the meeting and any follow up
correspondence.
Complete Revisions to Model
Based on the outcome of the stakeholder meeting, complete revisions to the hydraulic model.
Mill Ditch Diversion Flood Capacity Analysis (Bozeman Creek and Mill Ditch)
Develop 1D Hydraulic Model with Existing Geometry (Bozeman Creek
at Bankfull; Mill Ditch Takes Remainder)
Determine the 100-year fl ow split required at the Mill Ditch Diversion that
results in approximately bankfull fl ow along Bozeman Creek in the downtown
area downstream of the split. Revise the preliminary FIS hydraulic model
to refl ect the fl ow split.
Develop Inundation Exhibits for Existing Geometry Scenario
Develop inundation exhibits to show the eff ect of the increased fl ow split on
the fl ooding extents along Bozeman Creek and Mill Ditch for the existing
geometry scenario.
Develop Rough Proposed Geometry to Increase Conveyance Capacity in the Mill Ditch
After evaluating the inundation exhibits for the increased fl ow split and the existing geometry, evaluate improvements necessary
along Mill Ditch to handle the increased fl ow. Develop proposed geometry for the improvements.
Develop 1D Hydraulic Model with Proposed Mill Ditch Geometry
Create a proposed geometry hydraulic model to refl ect improvements to the Mill Ditch corridor.
Develop Inundation Exhibits for Proposed Mill Ditch Geometry Scenario
Develop inundation exhibits to show the eff ect of the increased fl ow split on the fl ooding extents along Bozeman Creek and Mill
Ditch for the proposed geometry scenario.
Develop Draft Technical Memorandum
Develop a brief draft technical memorandum to document and summarize the Mill Ditch Flood Capacity Analysis. The memorandum
will include a copy of the hydraulic model and the inundation exhibits.
Develop Final Technical Memorandum
Following review by the Client, develop a fi nal technical memorandum.
Incorporate Bond Street Bridge into Preliminary FIS
Refi ne 1D Hydraulic Model
Review and refi ne the portion of the preliminary AESI 1D hydraulic model containing the Bond Street Bridge.
Develop Floodway Model
Develop a fl oodway model to incorporate the Bond Street Bridge.
Floodplain Mapping (1D/2D or 2D Downtown Area and Bond Street Bridge)
Revise Flood Zone Boundary and Regulatory Floodway Boundary Delineations
Develop revised fl ood zone boundaries to refl ect the 1D/2D or 2D model addition and the addition of the Bond Street Bridge.
Develop Annotated Copies of FIRM, Flood Profi les, and FIS Report Tables
Develop annotated copies of FIRM, fl ood profi les, and FIS report tables to refl ect the addition of the 1D/2D or 2D model and the
Proposal Narrative
32 Discovery Drive . Bozeman, Montana 59718 . Ph: (406) 582-0221 . Fax: (406) 582-5770
www.alliedengineering.com
5
Bond Street Bridge. The approach to developing the annotated copies of the FIRM, Flood Profi les, and FIS Report Tables for the
1D/2D or 2D section of the model will require acceptance from FEMA. For a 2D model, a set of cross sections will need to be
employed at BFE contour lines and extended into the fl oodway fringe on both sides of the fl oodway. Cross-sections will also be
placed at changes in fl oodway width and at a spacing to represent stream characteristics. For a 2D model, the profi le will show
the profi le baseline and modeled hydraulic structures. For a 1D/2D model, the production of the annotated products will utilize the
1-D cross-sections applied to the stream channel. Existing cross-sections developed for the main channel will be used to establish
BFEs while new cross-sections will be developed on an as-needed basis for split fl ows that require separate fl oodways.
Produce a Certifi ed Topographic Work Map.
Develop Appeal Submittal Package
Develop Draft Summary Report
Develop a draft summary report to document and summarize the hydraulic model and mapping developed for the appeal.
Develop Draft Appeal Submittal Package
Develop a draft cover letter and materials for submittal to FEMA. The materials will include the hydraulic model and fl oodplain
mapping.
Develop Final Summary Report
Following review by the Client (and ideally FEMA/DNRC), develop a fi nal summary report.
Develop Final Appeal Submittal Package
Following review by the Client (and ideally FEMA/DNRC); develop a fi nal appeal submittal package.
Address FEMA Review Comments
Work associated with this task may include the following: communication with FEMA Reviewers; revisions to hydraulic model;
revisions to fl oodplain mapping; and development of a revised appeal submittal package.
Assumptions
1. Methodologies will require prior approval from FEMA;
2. The appeal will not modify hydrology;
3. The format of the model, maps, and report will follow the requirements laid out by FEMA for a LOMR submittal (refer to
attached MT-2 Forms 1, 2, and 3);
4. FEMA will update cHECk-RAS to run with HEC-RAS 5.0 or FEMA will grant a waiver from the requirement to run cHECk-
RAS; and
5. Regulatory fl oodway revision notifi cation as shown in Section D.3 of the LOMR application MT-2 form 2 will not be
required.
2.2 Deliverables
The following deliverables are anticipated to be submitted to the City in completion of this scope of work. Deliverables will be
submitted in an electronic format except where hard copies are required by reviewing agencies.
1. Schematic layout for revised hydraulic analysis and methodologies memorandum;
2. Preliminary Hydraulic Model (which incorporates 1D/2D or 2D and Bond Street Bridge) for review by stakeholders;
3. Memorandum to Document Stakeholder Meeting Regarding the Preliminary Hydraulic Model (1D/2D or 2D and Bond
Street Bridge);
4. Draft Mill Ditch Diversion Flood Capacity Analysis Technical Memorandum;
5. Final Mill Ditch Diversion Flood Capacity Analysis Technical Memorandum;
6. Draft Summary Report and Appeal Submittal Package;
7. Final Summary Report and Appeal Submittal Package; and
8. Revised Appeal Submittal Package.
Proposal Narrative
32 Discovery Drive . Bozeman, Montana 59718 . Ph: (406) 582-0221 . Fax: (406) 582-5770
www.alliedengineering.com
6
2.3 Schedule
Assuming authorization to proceed is granted by November 9, 2016, the following preliminary schedule is estimated for completion
of major project milestones:
Schedule
Milestone Anticipated Completion Date
Layout for revised hydraulic analysis and proposed methods memorandum December 2, 2016
Preliminary hydraulic model for review by stakeholders January 11, 2017
Preliminary fl oodway model for review by stakeholders February 10, 2017
Memorandum to document stakeholder meeting regarding preliminary hydraulic model March 3, 2017
Draft summary report and appeal submittal package March 31, 2017
Final summary report and appeal submittal package April 28, 2017
Draft Mill Ditch Diversion fl ood capacity analysis technical memorandum May 19, 2017
Revised appeal submittal package May 24, 2017
Final Mill Ditch Diversion fl ood capacity analysis technical memorandum June 16, 2017
2.4 Personnel Expected to Perform each Major Task
Paul Sanford will provide project management, oversight of model development, and quality control. Jennifer Johnson will take
primary responsibility for model development, mapping, and preparation of deliverables. Kevin Denn and Tom Grindeland will
provide additional review, assistance with model development, and assistance with quality control.
We may also enlist assistance from other professional engineers on the Allied Engineering staff experienced with hydraulics.
However, the modeling will be led and directed by Paul Sanford and Jennifer Johnson.
The chart on the following page depicts the roles for each of the major project subtasks. A “P” indicates primary staff for a task
while an “X” indicates support staff .
2.5 Prior Work History of Consultant and Sub-consultant
Allied Engineering and WEST Consultants collaborated on scoping for the FEMA Floodplain Appeal. WEST Consultants also
provided review of the preliminary downtown 1D/2D model developed by Allied Engineering in the context of moving forward with
a detailed model to be used for an appeal. Additionally, Paul Sanford attended a three day intensive HEC-RAS 2D training in July
of 2016 taught by Kevin Denn.
2.6 Anticipated Involvement of COB Staff
1. If necessary, attend conference calls/meetings with review agencies;
2. Provide plans (certifi ed by a registered professional engineer) for the Bond Street Bridge; and
3. Facilitate communication and coordination with review agencies.
Proposal Narrative
32 Discovery Drive . Bozeman, Montana 59718 . Ph: (406) 582-0221 . Fax: (406) 582-5770
www.alliedengineering.com
7
Proposal Narrative
32 Discovery Drive . Bozeman, Montana 59718 . Ph: (406) 582-0221 . Fax: (406) 582-5770
www.alliedengineering.com
8
3.0 Qualifi cations
3.1 Firm Profi les
Allied Engineering Services, Inc. (AESI)
AESI is an employee-owned, multi-disciplinary engineering company headquartered in Bozeman,
Montana. The fi rm specializes in water resource engineering, civil engineering, geotechnical engineering,
and surveying. Founded in 1996, AESI has grown steadily into a well-rounded, seasoned fi rm that is
large enough to off er our clients the convenience of in-house experts for a wide array of services. AESI
employs a qualifi ed, experienced staff of over 20 employees, including professional civil engineers,
engineer interns, a GIS specialist and licensed surveyors, all experienced with fl oodplain related projects.
AESI routinely provides hydraulic and fl oodplain services on rivers throughout Montana. Over the past 19 years, AESI has gained
relevant fl oodplain experience working on a diverse range of projects including: new fl ood studies and re-studies for Montana cities
and counties; private fl ood studies; hydraulic models of major rivers; FEMA Letters of Map Change; stream restoration; hydraulic
structures; and fl oodplain surveys for government and private clients. From direct work on FEMA Flood Insurance Studies and re-
studies, AESI is knowledgeable with FEMA procedures and will work to ensure that the appeal submittal meet the needs of FEMA
and the City of Bozeman.
WEST Consultants
WEST Consultants, Inc. specializes in advanced water resources investigations, working toward
sustainable solutions that balance the needs of the users with those of the environment. The fi rm’s
scientists and engineers are nationally recognized in hydrology, hydraulics, sediment transport, fl uvial
geomorphology and water quality for climates ranging from tropical to arid. WEST has offi ces in Salem
and Portland, Oregon; Bellevue and Vancouver, Washington; San Diego and Sacramento, California;
and Tempe, Arizona.
3.2 Project Team Individuals
Brief bios of the Key Project Team members and a description of the roles of the Project Team members are described in this
section. Complete resumes for key personnel are compiled in Appendix A Resumes for Key Personnel. An organization chart is
provided in the following section.
Paul Sanford, PE, MSCE, CFM – Principal Engineer, Project Manager
Mr. Sanford, a Registered Professional Engineer, has over 19 years of applied experience in civil engineering.
He has extensive experience and expertise in water resource projects including hydrologic/hydraulic analysis,
modeling, and design; hydraulic structures; dam rehabilitation; streambank stabilization; stream restoration;
fl ood studies; and stormwater analysis, modeling, and design. He is an expert building hydraulic and
hydrologic models using software programs such as HEC-RAS, HEC-HMS, Hydrafl ow Storm Sewers, Culvert
Master, and FlowMaster to model complex water resource projects. Mr. Sanford is experienced and eff ective
at coordinating and directing large projects with multiple stakeholders including environmental advocacy
groups, regulatory agencies, contractors, sub-consultants, and the public. He is a shareholder of Allied Engineering and frequently
serves on the Board of Directors.
Jennifer Johnson, PE, MSCE, CFM – Hydraulic Engineer
Ms. Johnson is a Registered Professional Engineer who works on a variety of water resource projects. Her
primary responsibilities span hydrologic and hydraulic modeling using HEC-HMS, HEC-RAS, Storm and
Sanitary Analysis, Culvert Master, Flow Master, HY-8, RiverFlo-2d, River2D, HEC-GeoRAS, HEC-GeoHMS,
and GIS. Recent projects have included 2D modeling on several streams in Idaho to quantify available fi sh
habitat. Other projects include 2D hydraulic modeling to assist with stream restoration, fl oodplain delineations
using 1D and 2D software, diversion structure modeling, dam rehabilitation, GIS analysis, permitting
Proposal Narrative
32 Discovery Drive . Bozeman, Montana 59718 . Ph: (406) 582-0221 . Fax: (406) 582-5770
www.alliedengineering.com
9
assistance, and site development. She is a Certifi ed Floodplain Manager and has worked on several projects with fl oodplain
related issues.
Kevin Denn, PE, MSC&EE (WEST Consultants) – Hydraulics QC
Mr. Denn is a senior hydraulic engineer with WEST and a licensed Professional Engineer in Oregon and
North Dakota. He has seven years of experience in a diverse range of project areas including hydraulic
and hydrologic engineering, numerical modeling, sediment transport studies, and geomorphic assessments.
He has particular in-depth experience in the use of a number of two-dimensional models, including SRH-
2D, HEC-RAS 2D, TUFLOW, and FLO-2D. Mr. Denn also has experience with a number of other software
programs used in hydraulic and hydrologic modeling eff orts, including HEC-HMS, HEC-SSP, HEC-FFA,
HEC-SSP, and HY-8, as well as other engineering software such as AutoCAD, ArcGIS, HEC-GeoRAS, HEC-
GeoHMS, and QGIS.
Thomas Grindeland, PE, MSCE, D.WRE (WEST Consultants) – Hydraulics QC
Mr. Grindeland is a Vice President and Senior Hydraulic Engineer at WEST Consultants, Inc. He has over 33
years of experience working as a hydraulic engineer. He is routinely involved in hydraulic modeling, fl oodplain
mapping, fl ood insurance studies, and levee certifi cation. His experience includes dozens of studies involving
the delineation of fl ood plains and the evaluation of potential fl ood hazards throughout FEMA Regions VIII,
IX, and X. He is experienced in all aspects of riverine Flood Insurance Studies and the procedures of FEMA.
He is experienced in a variety of analytical techniques for alluvial fans, including statistical methods and two-
dimensional hydraulic modeling. For a study of the Town of Telluride, Colorado, Mr. Grindeland managed the
development of MUDFLOW, the forerunner of the FLO-2D hydraulic model, a FEMA-approved model.
3.3 Project Team Organization
Paul Sanford of AESI, will serve as the Project Manager and lead point of contact with the City of Bozeman. Paul has successfully
managed the planning, design, and implementation of water resource projects including fl oodplain studies, stream restoration,
hydraulic structures and bank stabilization. Since it is a small project team and the tasks are well-defi ned, management of this
project will be straightforward and effi cient. The following organizational chart depicts project roles for each staff member.
SURVEYING
AESI Survey Department
HYDRAULIC
ENGINEERING
Paul Sanford, PE, MSCE, CFM
Jennifer Johnson, PE, MSCE, CFM
Additional Manpower
Rory Romey, PE
Andrew Graham, PE
PROJECT MANAGER
Paul Sanford, PE, MSCE, CFM
QUALITY CONTROL
Kevin Denn, PE, MSC&EE
Thomas Grindeland, PE, MSCE, D.WRE
CLIENT
City of Bozeman
Engineering Division
Proposal Narrative
32 Discovery Drive . Bozeman, Montana 59718 . Ph: (406) 582-0221 . Fax: (406) 582-5770
www.alliedengineering.com
10
3.4 Availability of Project Team Members
The following table illustrates our team’s present workload and projected workload for the time period of November 2016 to June
2017. The percentages shown refl ect our estimated commitment to other projects. Our project team has the availability to make
this project a top priority, to complete the work on or before the desired completion date, and to provide excellent customer service.
Present and Projected Workloads
Team Member Present Workload
(% Committed to Existing Projects)
Projected Workload Commitments,
Nov. 2016 - June 2017
(% Committed to Other Projects)
Paul Sanford 60 40
Jennifer Johnson 80 20
Kevin Denn 90 50
Thomas Grindeland 30 30
3.5 Recent Experience of Project Team on Similar Projects
The following text provides descriptions of related past projects completed by AESI and WEST Consultants. For more information
regarding these and other applicable projects, please see the project sheets included in Appendix B.
AESI’s Experience
City of Bozeman Floodplain Evaluation
Allied Engineering Services, Inc. (AESI) was hired by the City of Bozeman to assist with select review and evaluation of the
Bozeman Creek and Tributaries Floodplain Mapping Project. In addition to general model review, manipulations to the model
were also completed to determine possible mitigation measures to lower base fl ood elevations in areas susceptible to fl ooding.
Specifi cally, AESI evaluated the eff ect on the fl oodplain of increasing the fl ow split from Bozeman Creek to the Mill Ditch Diversion.
AESI also evaluated the addition of an inset fl oodplain on Bozeman Creek at Creekside Park as well as changes to the model to
more accurately refl ect the fl ooding characteristics at the park.
A bridge on Bozeman Creek at Bond Street was constructed after the survey for the project was completed and the fl oodplain
model was developed by FEMA. AESI completed a fi eld survey of the new bridge and added the bridge to the model in anticipation
of a future Letter of Map Revision.
The Bozeman Creek and Tributaries project was completed using HEC-RAS V4.1.0. Since modeling completion, HEC-RAS V5.0,
V5.0.1, and V5.0.3 has been introduced. The new versions include 2D modeling capabilities which off er improved hydraulic
simulations for split fl ow areas, especially in downtown Bozeman. AESI modifi ed the model setup to a 1D model within the main
channel and a 2D mesh to represent the overbank areas. Ultimately, the preliminary 1D/2D model showed that utilizing 2D areas
for the downtown Bozeman area could have signifi cant implications for fl ood mapping. The 1D/2D model setup appeared to better
describe fl ow splits and conveyance paths. The exercise is intended to be used by the City as a tool for determining modeling
methods moving forward.
Ruby River Restoration Project
AESI was hired by Gillilan Associates to complete hydraulic modeling and drafting for
the Ruby River Restoration project near the Ruby’s confl uence with the Beaverhead
River. The river has seen signifi cant down cutting and a reduction in vegetative cover
over the last 100 years - likely from man-infl uenced manipulations of the river including an
upstream dam. Additionally, what has historically been a multi-thread river is now a single
thread channel. Restoration plans include adding fi ll and riffl e structures to help reconnect
Proposal Narrative
32 Discovery Drive . Bozeman, Montana 59718 . Ph: (406) 582-0221 . Fax: (406) 582-5770
www.alliedengineering.com
11
the river with its fl oodplain. Two remnant meander bends and several fl ow splits will be reactivated. Because of the complex
nature of the restoration design, the project team elected to use a 2D model setup (HEC-RAS) to simulate fl ows. This allows for
a more detailed output of shear stresses and split fl ows. While the project is ongoing, AESI has completed the existing conditions
model, and the simulations are in good agreement with measured data. Moving forward, AESI plans on iterating on the grading
design to assure fl ow splits are activated at appropriate fl ow levels and shear stress maximums are not exceeded.
Recent Work for the City of Bozeman
The following table presents our recent work for the City of Bozeman. The projects at the bottom of the table were completed in
the early 2000’s. Paul Sanford has managed most of the recent City projects.
Recent Work for the City of Bozeman
Project Year Completed
City of Bozeman Floodplain Evaluation 2016
Bozeman Pond Park Expansion 2016
Cottonwood Road Improvements 2015
Bozeman Creek - City Parking Lot 2015
City of Bozeman Development Review Term Contract On-going
Bozeman Creek Hydraulic Model 2012
North 7th Avenue Lighting, ROW, and Preliminary Design 2010
North 7th Avenue Phase 1 Sidewalk Improvements 2010
Intermodal Facility (Parking Garage) 2009
New City Hall Renovation Testing & Inspection 2008
Kagy Road Repairs 2007
Water Facility Plan 2006
Public Library 2006
Solvent Site Water Main Extension 2001
Transfer Station Design 2001
WEST Consultant’s Experience
Flood Insurance Study and Flood Reduction Alternatives Analysis for City of Turner, Oregon
A FEMA Flood Insurance Study was conducted along approximately 4.2 stream miles of Mill Creek and Mill Creek Bypass in the
City of Turner, in Marion County, OR. As part of the study, a fl ood risk reduction alternatives analysis was conducted to understand
what modifi cations to existing hydraulic structures, channels and fl oodplains could be implemented to reduce fl ood risk within the
City.
Ground surveys for approximately 53 cross sections and 12 hydraulic structures were completed using a combination of RTK GPS
and Optical Total Station equipment. This allowed for all of the survey data to be quickly and easily geo-referenced to existing
National Geodetic Survey (NGS) monuments, resulting in easy integration with available LiDAR topographic data.
HEC-RAS was used to perform the 1-D hydraulic analysis. Water surface profi les for the 2-, 5-, 10-, 25-, 50-, 100-, and 500-year
fl ood events as well as the 100-year fl oodway were determined. All geometry data within the hydraulic model is geo-referenced,
so the output data could be post-processed using automated mapping and display techniques in HEC-RAS and ArcGIS. After
thorough in-house Corps QC reviews, the completed products (including hydraulic model, fl ood profi les, fl oodway data tables, work
maps, FBS audit results, MT-2 forms and all backup data) were submitted to FEMA as a Letter of Map Revision for incorporation
into the Flood Insurance Study for Marion County and Incorporated Areas.
Proposal Narrative
32 Discovery Drive . Bozeman, Montana 59718 . Ph: (406) 582-0221 . Fax: (406) 582-5770
www.alliedengineering.com
12
Lower North Santiam River Restoration Alternative Analysis – Marion County, Oregon
WEST Consultants (WEST) supported River Design Group (RDG) in the development of fl oodplain and off channel habitat
improvement projects along the lower North Santiam River. Working for the North Santiam Watershed Council, WEST and RDG
have developed and evaluated various restoration alternatives including secondary channel connection improvements and levee
removal.
WEST developed a 2-dimensional HEC-RAS hydraulic model of the North Santiam River. The model extends approximately from
Stayton to the Hatch Airport. The model shows the connectivity between the main channel and secondary channels, including
Diekman Creek, and the fl oodplain for various river fl ow magnitudes for existing conditions and for each of the various habitat
improvement alternatives. The model allows the Watershed Council to understand how much additional secondary channel and
fl oodplain connectivity would be expected from each alternative, providing a basis for ranking each alternative.
As part of the alternatives analysis, the changes in fl ood risk to surrounding properties associated with each alternative were
determined. This was done to help understand and communicate the impacts of each alternative with the Watershed Council and
project stakeholders. It will also be one of the criteria used for the selection of the preferred restoration alternatives.
4.0 References
Please see the following table for a list of our references.
References
Project: Client: Contact Person:
USFS Instream Flow Measurement Service USDA Forest Service –
Intermountain Region
Tim Page
(208) 342-9049
tpage@fs.fed.us
Denny Creek Flood Study Hebgen Basin Fire District
Sean O’Callaghan
Gallatin County Floodplain Administrator
(406) 582-3130
sean.ocallaghan@gallatin.mt.gov
Ruby River Gillilan Associates
Scott Gillilan
(406) 581-1597
scott@gairesources.com
Flood Insurance Study and Flood Risk Reduction
Alternatives Analysis for City of Turner, Oregon City of Turner, Oregon
David Sawyer
(503) 743-2155
turner.cityadmin@wbcable.net
5.0 Signed Non-Discrimination Affi rmation Form
A signed non-discrimination affi rmation form is included in Appendix C.
Proposal Narrative
Appendix A
Professional History
Allied Engineering Services, Inc., Bozeman, Montana, 1997 - Present: Mr.
Sanford, a Registered Professional Engineer, has 20 years of applied experience in
civil engineering. He has extensive experience and expertise in water resource projects
including hydrologic/hydraulic analysis, modeling, and design; hydraulic structures;
dam rehabilitation; streambank stabilization; stream restoration; fl ood studies; and
stormwater analysis, modeling, and design. He is an expert building hydraulic and
hydrologic models using software programs such as HEC-RAS, HEC-HMS, Hydrafl ow
Storm Sewers, Culvert Master, and FlowMaster to model complex water resource
projects. Mr. Sanford is experienced and eff ective at coordinating and directing large
projects with multiple stakeholders including environmental advocacy groups, regulatory
agencies, contractors, sub-consultants, and the public. In addition to his water resources
experience, Mr. Sanford has designed miles of large diameter municipal pipelines;
designed several pedestrian transportation projects; and designed miles of both urban
and rural roadways. He is a shareholder of Allied Engineering and frequently serves on
the Board of Directors.
Montana Dept. of Transportation (MDT), Bozeman, MT, 1995 - 1996: Mr. Sanford
performed design work for overlay projects on Interstate 94 near Hysham Hills and
Interstate 90 in Livingston. While at MDT, Mr. Sanford also logged over 750 hours on
MicroStation while completing project drawings and MDT detailed drawings.
City of Great Falls, Great Falls, Montana, Summer Internship 1994
Project Experience
Bozeman Creek and Tributaries FEMA Re-Study, Bozeman, Montana: Project
manager for sub-consultant survey contract to survey 18.5 miles of stream capturing
hydraulic structures and cross-sections. The extensive survey included over 200
structures and 500 cross-sections that will provide the basis for a detailed hydraulic
model. All data was obtained and submitted according to FEMA standards.
Bozeman Creek Hydraulic Model, Bozeman, Montana: Project manager and
hydraulic engineer for a 1 mile hydraulic study of Bozeman Creek through downtown
Bozeman. Running through the heart of the City of Bozeman, Bozeman Creek has
been narrowed and straightened, its banks armored with rock and concrete, its riparian
vegetation removed or reduced to a thin green line. A coordinated eff ort led by
community organizations, city, state, and federal partners, consulting professionals and
landowners began in 2010 with a vision to create a naturally functioning and connected
creek corridor with healthy riparian areas and fl oodplains. To serve as a planning,
design, and permitting tool for on-going and future channel and habitat enhancement
projects, Mr. Sanford led the eff ort to create a HEC-RAS hydraulic model of Bozeman
Creek through downtown Bozeman.
Bozeman Ponds Expansion Project, Bozeman, Montana: Engineering Project
Manager for the improvements to Bozeman Pond Park which include: a dog park with
shade pavilion and other amenities, picnic and restroom facilities, a play area, paved
and gravel fi nes walking trails, landscaped areas, a parking lot, and a stormwater
detention basin.
Flynn-Lowney Diversion Reconstruction and Play Wave, Missoula, Montana:
The Flynn-Lowney Diversion is located on the Clark Fork River in the City of Missoula.
Brennan’s Wave, a non-profi t group, hired Allied Engineering with sub-consultant S2O
Design to design the reconstruction of the diversion with incorporation of a play wave.
Mr. Sanford served as project manager directing and providing the analysis and design
required to permit and reconstruct the Flynn-Lowney Diversion as a multi-purpose in-
stream structure. The design included two grouted sloping boulder drops, a passage
Registration
Professional Engineer:
Licenses:
Montana 12580 PE
Colorado 40454 PE
Idaho 12331 PE
Texas 104270 PE
Wyoming 10950 PE
Wisconsin 38318-6 PE
Certifi ed Floodplain Manager
(CFM), 2006
Education
Montana State University
B.S. Civil Engineering 1996
Montana State University
M.S. Civil Engineering 1997
Organizations
Association of Montana
Floodplain Managers (AMFM)
Association of State Floodplain
Managers (ASFPM)
Montana Association of Dam and
Canal Systems (MADCS)
Publications
“Modeling a Concrete Block
Irrigation Diversion System”, w/
Joel Cahoon, and Tom Hughes,
Journal of the American Water
Resources Association, Vol. 34,
No. 5, October 1998.
Paul J. Sanford, PE, MSCE, CFM
Principal • Civil & Hydraulic Engineer • Project Manager
Page 1
channel for boaters and fi sh, and accommodation of fl ows ranging from less than 2,000
cfs up to 42,500 cfs.
Forest Service Instream Flow Analysis and Modeling, Idaho: Project Manager
for this project in which Allied Engineering (prime consultant) collaborated with ERM
(sub-consultant) to perform 2D hydraulic modeling and fi sh habitat modeling on
several streams in the Intermountain Region (Region 4) of the US Forest Service. The
2-dimensional hydraulic modeling computer program River2D was used to develop
steady state hydraulic models and estimate reach level fi sh habitat characteristics
for fry, juvenile, adult, and spawning life history stages of the following fi sh species:
Chinook salmon, steelhead, bull trout, cutthroat trout, and brook trout. The team applied
calibration and sensitivity analyses to fi ne tune the hydraulic model. Fish habitat
modeling was completed to develop relationships between weighted usable area (WUA)
and discharge. The team also explored the relationship between cover and habitat
calculations through a macro developed in VBA. The project involved extensive data
management and use of ArcGIS for both pre and post processing of model data.
Yellowstone County Floodplain Studies, Yellowstone County, Montana: Provided
project management and fl oodplain maps for Cove Creek and Five Mile Creek for a total
stream length of over 10 miles. Responsibilities included production of the Technical
Support Data Notebook in accordance with FEMA Publication 37 - Guidelines for Study
Contractors.
Three Forks Flood Study, Three Forks, Montana: Provided project management for
sub-consultant surveying and mapping services for a fl oodplain study of the Madison
River (2.1 river miles) and Jeff erson River (4.2 river miles) in the vicinity of Three Forks.
Assignment included project management for surveying, creation of base map, and
fl oodplain mapping for an area covering roughly 7.5 square miles. ArcView and HEC
GeoRAS were used to build the geometric model and to map the fl oodplain. The project
complied with FEMA Guidelines and Specifi cations for Flood Hazard Mapping Partners.
Hyalite Creek Flood Studies, Gallatin County, Montana: Provided fl oodplain studies
for over 3600 feet of Hyalite Creek for two separate projects in the Four Corners area of
Gallatin County. HEC-RAS was used to model the two reaches both of which included
a bridge. Arc-View 3.2 with the GeoRAS extension was used to extract the geometry fi le
and to map the resulting fl oodplain. A fl ood hazard evaluation complying with Gallatin
County subdivision regulations was also completed for 3000 feet of Hyalite Creek.
Fiddler Creek LOMR, Stillwater County, Montana: Project Manager and hydraulic
engineer for a FEMA Letter of Map Project involving roughly 3,000 feet of Fiddler Creek.
The computer program HEC-RAS was used to develop a Duplicate Eff ective and
Corrected Eff ective Hydraulic model. The basis for the LOMR was updated and more
detailed topographic survey information. ArcMap and the extension GeoRAS were used
to create a georeferenced HEC-RAS model and to map the revised fl oodplain.
Buck Creek and West Gallatin River Flood Study, Gallatin County, Montana:
Provided a fl oodplain study of over 3000 feet of the West Gallatin River and over 800
feet of Buck Creek. HEC-RAS was used to model this complex system containing
a bridge, fl ow splits, and combining fl ow. Arc-View and HEC-GeoRAS were used to
produce the input geometry fi le as well as to map the resulting fl oodplain.
Figgins Creek LOMR-F, Bozeman, Montana: Applied for and obtained a Letter of
Map Revision Based on Fill (LOMR-F) from FEMA for a three-acre parcel bordered by
Riggins Creek in Bozeman. The LOMR-F removed portions of the property from the
100-year jurisdictional fl oodplain. HEC GeoRAS and ArcView were used to delineate
the eff ective fl oodplain on the detailed digital terrain model thereby establishing the
minimum extents of fi ll required. Arc-View and HEC GeoRAS were used to produce the
input geometry fi le as well as to map the resulting fl oodplain.
Presentations
Flood Studies - 2004 Association
of Montana Floodplain Managers
(AMFM) Conference, Big Sky, MT
SH Diversion Dam Removal - 2009
AMFM Conf., Great Falls, MT
Lecturer at 2009 Lorman Seminar
titled “Current Issues in Storm
Water Regulation in Montana”,
Billings, MT
LOMR Case Studies - 2010 AMFM
Conference, Chico, MT
Riprap Design Short Course -
2010 Montana Association of Dam
and Canal Systems Conference
(MADCS), Billings, MT
Teton Creek Restoration - 2011
AMFM Conf., Lewistown, MT
Rock Riprap Bank Stabilization -
2012 AMFM Conf., Kalispell, MT
Clearwater River Fish
Barrier Removal & Channel
Reconstruction - 2014 AMFM
Conference, Billings, MT
Chadbourne Diversion
Reconstruct. - 2014 MADCS Conf.,
Fairmont Hot Springs, MT
Continuing Education
National Highway Institute 5-day
HEC-RAS Seminar, Oct. 1997
American Water Resources
Association (AWRA) Annual
Conference, October 2000
Project Managers Bootcamp 2-Day
Seminar, March 2000
MT Section – American Water
Works Association and Montana
Water Environment Association -
Annual Conference, April 2001
Association of Montana Floodplain
Managers – Annual Conference
- 2002, 2003, 2004, 2006, 2007,
2009, 2010, 2011, 2012, 2013,
2014
DNRC Floodplain Hydraulics Using
HEC-RAS, 2.5 Day Course, 2011
ASCE HEC-RAS 2D, 3 Day
Course, 2016
Paul J. Sanford, PE, MSCE, CFM
Principal • Civil & Hydraulic Engineer • Project Manager
Page 2
Professional History
Allied Engineering Services, Inc., Bozeman, Montana, May 2012 – Present: Ms.
Johnson works on a variety of water resource and civil projects. Primary responsibilities
span hydrologic and hydraulic modeling using HEC-HMS, HEC-RAS, RiverFlo-2d, and
GIS. Recent projects have included river modeling with 1D and 2D software, diversion
structure modeling, GIS analysis, permitting assistance, and site development. She
also regularly works in AutoCAD Civil3D.
Project Experience
Bozeman Creek and Tribs FEMA Re-Study, Bozeman, Montana: The DNRC selected
Bozeman Creek, four of its tributaries, and the Mill Ditch Diversion for a fl oodplain
re-study as part of FEMA’s RiskMAP program. Allied Engineering served as a sub
consultant to Atkins to provide fi eld survey for approximately 18.5 miles of stream.
Jennifer completed fi eld reconnaissance for multiple structures in the area and provided
sketches and measurements for signifi cant bridges. She also assisted with data
management to ensure that the deliverables met FEMA standards.
Bozeman Creek Hydraulic Model, Bozeman, Montana: Proposed alterations to
Bozeman Creek near Bozeman City Hall were analyzed by Ms. Johnson in HEC-RAS.
The alterations included incorporating a new channel alignment and modifying the
shape and fl oodplain for several problematic cross-sections. A new bridge structure at
one street crossing was also modeled to determine its impact on conveyance and fl ood
elevations.
Flynn-Lowney Irrigation Diversion Reconstruction, Missoula, Montana: Mrs.
Johnson completed a variety of hydraulic models for planned improvements to a
diversion structure in the Clark Fork River. She created HEC-RAS models of existing
and proposed conditions to determine the impact of the project on base fl ood elevations
and ensure that construction was in compliance with the no-rise stipulation. Mrs.
Johnson also modeled the adjacent irrigation ditch in HEC-RAS to help confi rm that
water rights are not negatively impacted by the modifi ed diversion structure. Finally,
she created a 2-D model using RiverFLO-2D to assess water velocities in the main
channel for fi sh passage.
Forest Service Instream Flow Analysis and Modeling, Idaho: Jennifer served as
the staff engineer for several instream fl ow studies on rivers and streams in Idaho for
the US Forest Service. She developed several 2D models using River2D to describe
hydraulics and help defi ne relationships between physical habitat and discharge for
several diff erent fi sh species and diff erent life stages. She also wrote a macro in Excel
to expedite habitat modeling and streamline the process.
Castle Creek, Pitkin County, Colorado: Several stream alterations are planned for
Castle Creek to mitigate fl ooding and re-activate an existing side channel. Mrs. Johnson
created an existing conditions model in HEC-RAS to analyze the current hydraulic state
of the area for large fl ows. She also created a split fl ow model to determine necessary
alterations to the main channel for increased fl ow to a side channel during low fl ows.
Egge Diversion Dam, Golden Valley County, Montana: Jennifer assisted with the
hydraulic modeling and plan production for the removal of the Egge Diversion Dam
in Golden Valley County, Montana. 2011 fl oods on the Musselshell River caused an
avulsion around the dam and resulted in the need to remove the non-functioning dam
and restore the bank. Allied Engineering worked with Fish Wildlife and Parks to create
a “soft” bank restoration solution. Jennifer’s HEC-RAS hydraulic model of the reach
was applied to determine design elevations and create a bank restoration area that
improved fl oodplain connectivity. Jennifer also produced a comprehensive plan set for
dam removal and bank restoration.
Registration
Professional Engineer
License No. 40765 PE - Montana
Certifi ed Floodplain Manager
Education
Montana State University
M.S. Civil Engineering 2012
B.S. Civil Engineering 2009
Training
AMFM Annual Conference –
2013, 2014, 2015, 2016
DNRC Spillway Design and
HEC-HMS, 2010
DNRC Outlet Works, 2013
Jennifer Johnson, PE, MSCE, CFM
Civil Engineer
KEVIN D. DENN, P.E.
Senior Hydraulic Engineer
Mr. Denn is a senior hydraulic engineer with WEST and a licensed
Professional Engineer in Oregon and North Dakota. He has seven years of
experience in a diverse range of project areas including hydraulic and
hydrologic engineering, numerical modeling, sediment transport studies, and
geomorphic assessments. He has particular in-depth experience in the use of a
number of two-dimensional models, including SRH-2D, HEC-RAS 2D,
TUFLOW, and FLO-2D.
Mr. Denn recently conducted two hydraulic and sediment transport
assessments for proposed water intake structures in Oregon and North
Dakota using SRH-2D. These assessments were used to define flow depths
and velocities near the existing and proposed intake structures and to
determine bed scour and deposition potential. Using the 2D component of
HEC-RAS, Mr. Denn has performed a number of two-dimensional analyses
to determine flow characteristics near structures and the spreading of flow
through complex floodplains for a range of flows. He has served as a
developer of and instructor for HEC-RAS 2D courses taught throughout the
nation for a number of public and private entities. Another two-dimensional
model, FLO-2D, has been used numerous times by Mr. Denn for a number
of applications, including assessing spatial drainage characteristics within
levee-protected areas in Oregon and Washington, assessing flood-prone
areas within large, rural watersheds in Arizona and Texas, and determining
inundated areas resulting from levee breaches in Nebraska and California.
In addition, Mr. Denn has served as a technical reviewer for a number of
projects modeled using FLO-2D. Based on his particularly in-depth project-
based understanding of FLO-2D, the program developer invited Mr. Denn to
serve as a guest lecturer on the FLO-2D webinar series. Mr. Denn also
developed and taught a three-day course focused on the use of FLO-2D within
levee-protected areas. Finally, Mr. Denn has utilized the two-dimensional
model TUFLOW to determine inundated areas resulting from levee breaches
in Illinois.
Mr. Denn’s other project experience includes floodplain delineation studies,
bridge and channel designs, water quality treatment facility designs, and
geomorphic assessments. His experience includes applications of HEC-RAS
1D (steady and unsteady) for assessing riverine, tidal, and dam breach
hydraulics in Oregon, Maine, and Washington; assessing riverine and tidal
hydraulics in Oregon, Maine, and Washington; applications of HEC-HMS for
simulating complex snowmelt, rain-on-snow, and rainfall-only events
throughout the midwestern United States; developing the technical reference
manual and application guide for HEC-FIA version 3.0; using HEC-FIA to
assess flood impacts to population and structures in Missouri; and developing
geomorphic assessments for the Fargo, ND and Moorhead, MN Flood Risk
Management Project in North Dakota and Minnesota.
Mr. Denn also has experience with a number of other software programs used
in hydraulic and hydrologic modeling efforts, including HEC-HMS, HEC-SSP,
HEC-FFA, HEC-SSP, and HY-8, as well as other engineering software such as
AutoCAD, ArcGIS, HEC-GeoRAS, HEC-GeoHMS, and QGIS.
REGISTRATION
Professional Civil Engineer
Oregon No. 86896PE
North Dakota No. PE-8987
EDUCATION
M.S. (Civil and
Environmental Engineering -
Hydraulics) University of
Iowa
B.S. (Civil Engineering)
University of Wisconsin –
Platteville
PROFESSIONAL
AFFILIATIONS
American Society of Civil
Engineers (ASCE)
THOMAS R. GRINDELAND, P.E., D.WRE
Senior Vice President
Tom Grindeland, P.E., D.WRE, is a Vice President and Senior Hydraulic
Engineer at WEST Consultants, Inc.. Mr. Grindeland has over 33 years of
experience working as a hydraulic engineer. He is routinely involved in
hydraulic modeling, floodplain mapping, flood insurance studies, and levee
certification. Tom led levee certification efforts for seven entities along the
Cowlitz River in Washington, the City of Warrenton, Oregon, and Scappoose
Drainage Improvement Company. He also served as the project manager for
development of risk analysis methods for evaluation of improvements along the
1,300 miles of levees along the Sacramento River Flood Control Project. He has
worked on numerous projects with both FEMA and the Corps of Engineers
through his career and has an excellent understanding of the requirements for
permitting by the U.S. Army Corps of Engineers under 33 USC Section 408.
His experience includes dozens of studies involving the delineation of flood
plains and the evaluation of potential flood hazards throughout FEMA Regions
VIII, IX, and X. He is experienced in all aspects of riverine Flood Insurance
Studies and the procedures of the Federal Emergency Management Agency
(FEMA). This includes the certification of levees.
He has conducted flood insurance projects for dozens of watercourses in Oregon,
Washington, Colorado, Wyoming, Montana, California, and Nevada. This work
has included new studies, restudies, and changes to existing studies. Mr.
Grindeland has also prepared successful applications to FEMA for a large
number Letter of Map Change (LOMC) efforts including LOMAs, LOMRs,
CLOMRs, and PMRs.
His experience includes all phases of flood insurance studies, including project
scoping, aerial photography and orthophoto development, photogrammetric and
LIDAR-derived topographic data, hydrographic surveys of channels and
hydraulic structures, hydrologic analysis based on statistical analysis of gage
data, regional flood frequency evaluations, and physical process modeling,
hydraulic analysis using 1- and 2-dimensional models, with and without levee
analyses, floodplain delineation, floodway determinations, flood map
development, DFIRM preparation, Flood Insurance Study Report preparation,
public meetings, post preliminary support, and response to appeals.
Mr. Grindeland is also experienced in the evaluation of flood hazards associated
with alluvial fans and development of design of mitigation measures. He is
experienced in a variety of analytical techniques for alluvial fans, including
statistical methods and two-dimensional hydraulic modeling. For a study of the
Town of Telluride, Colorado, Mr. Grindeland managed the development of
MUDFLOW, the forerunner of the FLO-2D hydraulic model, a FEMA-approved
model.
REGISTRATION
Professional Civil Engineer
Washington No. 32644
Oregon No. 59786PE
Colorado No. 24029
Idaho No. 7632
Diplomate. Water Resource
Engineer (D.WRE)
AAWRE No. 00097
CERTIFICATION
AAWRE Diplomate, Water
Resource Engineer
EDUCATION
M.S. (Civil Engineering)
Colorado State University,
Colorado
B.S. (Civil Engineering)
University of Massachusetts,
Massachusetts
PROFESSIONAL
AFFILIATIONS
American Society of Civil
Engineers
Past President, Oregon
Section Capital Branch
Appendix B
32 Discovery Drive . Bozeman, Montana 59718 . Ph: (406) 582-0221 . Fax: (406) 582-5770 299 Prairie Drive . Stanley, North Dakota 58784 . Ph. (701) 628-0221 . www.alliedengineering.com
The Bozeman Creek and Tributaries project aims to update fl oodplain mapping for the Bozeman area using the Army Corps of Engineer’s HEC-RAS computer program, a hydraulic modeling program, and updated elevation data. Large scale fl oodplain mapping was last completed for the Bozeman area in 1988 with a digital conversion of the data occurring in 2011.
Allied Engineering Services, Inc. (AESI) was hired by the City of Bozeman to assist with select review and evaluation of the Bozeman Creek and Tributaries Floodplain Mapping Project. In addition to general model review, manipulations to the model were also completed to determine possible mitigation measures to lower base fl ood elevations in areas susceptible to fl ooding. Specifi cally, AESI evaluated the eff ect on the fl oodplain of increasing the fl ow split from Bozeman Creek to the Mill Ditch Diversion. AESI also evaluated the addition of an inset fl oodplain on Bozeman Creek at Creekside Park as well as changes to the model to more accurately refl ect the fl ooding characteristics at the park.
A bridge on Bozeman Creek at Bond Street was constructed after the survey for the project was completed and the fl oodplain model was developed by FEMA. AESI completed a fi eld survey of the new bridge and added the bridge to the model in anticipation of a future Letter of Map Revision.
The Bozeman Creek and Tributaries project was completed using HEC-RAS V4.1.0. Since modeling completion, HEC-RAS V5.0 and V5.0.1 has been introduced. Both new versions include 2D modeling capabilities which off er improved hydraulic simulations for split fl ow areas, especially in downtown Bozeman. AESI modifi ed the model to include a 2D area spanning several blocks in the downtown area, and the 2D model results were compared to the 1D modeling results. Ultimately, the preliminary 1D/2D model showed that utilizing 2D areas for the downtown Bozeman area could have signifi cant implications for fl ood mapping. The 1D/2D model setup appeared to better describe fl ow splits and conveyance paths. The exercise is intended to be used by the City as a tool for determining modeling methods moving forward.
Client ReferenceBrian Heaston, PE – Project EngineerCity of Bozeman Engineering Divisionbheaston@bozeman.net(406) 582-2280
Completion Date2016
Firm’s Contract Amount$19,670
Project PersonnelPaul Sanford, PE, CFMJennifer Johnson, PE, CFMKyle Thompson, LS
Bozeman Creek & Tributaries Floodplain Mapping Project - Select Review and EvaluationBozeman, Montana
16-062
32 Discovery Drive . Bozeman, Montana 59718 . Ph: (406) 582-0221 . Fax: (406) 582-5770
299 Prairie Drive . Stanley, North Dakota 58784 . Ph. (701) 628-0221 . www.alliedengineering.com
Running through the heart of the City of Bozeman, Bozeman Creek has been
narrowed and straightened, its banks armored with rock and concrete, its
riparian vegetation removed or reduced to a thin green line. A coordinated
effort led by community organizations, city, state, and federal partners,
consulting professionals and landowners began in 2010 with a vision to create
a naturally functioning and connected creek corridor with healthy riparian
areas and fl oodplains. To serve as a planning, design, and permitting tool
for on-going and future channel and habitat enhancement projects, Allied
Engineering created a HEC-RAS hydraulic model of Bozeman Creek through
downtown Bozeman.
The hydraulic model was geo-
referenced using HEC-GeoRAS and
included several bridges and other
hydraulic structures. Additionally,
Allied Engineering determined natural
bankfull channel geometry for the highly
altered stream system to serve as a
benchmark for future channel design. Finally, a proposed conditions model
was created to estimate the effects from naturalizing the channel geometry,
creating an inset fl oodplain, and replacing a small bridge with a larger structure
for a small reach near City Hall. Key project features include:
• Ground survey: 64 cross sections and 11 bridges;
• Processing 2007 LiDAR data to establish a digital terrain model of
the fl oodplain;
• Development of an existing conditions model in HEC-RAS of roughly
4800 feet of Bozeman Creek;
• Development of a HEC-RAS model representing proposed channel
modifi cations; and
• A comparison between the existing conditions model and the FEMA
effective model.
Client Reference
Phase 1:
Tammy Crone
Gallatin Local Water Quality Dist.
215 West Mendenhall, Suite 300
Bozeman, MT 59715
(406) 582-3168
tammy.crone@gallatin.mt.gov
Phase 2:
Brian Heaston, Project Engineer
City of Bozeman
PO Box 1230
Bozeman, MT 59771-1230
(406) 582-2280
bheaston@bozeman.net
Project Coordinator:
Gary Weiner, Resource
Management Specialist
National Park Service
4030 Sourdough Road
Bozeman, MT 59715
(406) 587-1667
gary_weiner@nps.gov
Completion Date
2012
Firm’s Contract Amount
Phase 1: $9,100
Phase 2: $10,000
Project Personnel
Paul Sanford, PE, CFM
Rory Romey, PE
Jennifer Johnson, PE, CFM
Kyle Thompson, LS
Greg Finck, LS
Project Location
Latitude: 45.675834°
Longitude: -111.032050°
Bozeman Creek Hydraulic Model
Bozeman, Montana
11-126
32 Discovery Drive . Bozeman, Montana 59718 . Ph: (406) 582-0221 . Fax: (406) 582-5770
299 Prairie Drive . Stanley, North Dakota 58784 . Ph. (701) 628-0221 . www.alliedengineering.com
The DNRC selected Bozeman Creek, four of its tributaries, and the Mill Ditch
Diversion for a fl oodplain re-study as part of FEMA’s RiskMAP program. The
work provides better fl ood mitigation planning tools and an update of the fl ood
hazard maps that were prepared in the 1970’s and ‘80’s using outmoded
procedures. Allied Engineering served as a sub-consultant to Atkins to provide
fi eld survey for approximately 18.5 miles of stream. Field surveying was
conducted to establish horizontal and vertical control, collect geometric data
for hydraulic structures, and characterize channel cross sections at numerous
locations. The extensive survey included over 200 structures and 500 cross-
sections that will provide the basis for a detailed hydraulic model. All data was
obtained and submitted according to FEMA standards.
The following fi eld survey work products were delivered to the DNRC:
• Field Reconnaissance Summary Report
• Field Survey Summary Report describing the fi eld survey eff ort,
documenting the horizontal and vertical control, describing and
providing the results of all QA/QC review steps, and certifying the
work
• Survey Notes
• Hydraulic Structures Sketches and Data Sheets
• Raw Survey Data from GPS and conventional equipment
• Metadata File complying with NRIP Metadata Profi les Specifi cations
• Products as required by Appendix M of FEMA G&S
Client Reference
Client:
Atkins
Dan March, PE (now with HDR)
406-577-5015
Daniel.March@hdrinc.com
Project Owner:
Montana DNRC
Steve Story, PE
406-444-6664
sestory@mt.gov
Completion Date
2013
Firm’s Contract Amount
$49,770
Project Personnel
Paul Sanford, PE, CFM
Rory Romey, PE
Jennifer Johnson, PE, CFM
Gary Fox, EI
Kyle Thompson, LS
Project Location
Latitude: 45.675834°
Longitude: -111.032050°
Bozeman Creek and Tributaries
FEMA Re-Study
Bozeman, Montana
12-118
32 Discovery Drive . Bozeman, Montana 59718 . Ph: (406) 582-0221 . Fax: (406) 582-5770
299 Prairie Drive . Stanley, North Dakota 58784 . Ph. (701) 628-0221 . www.alliedengineering.com
Bozeman Creek is confi ned to a deep ditch like channel between East Babcock
Street and the south alley of Main Street. Characteristic of the downtown section,
the creek lacks a natural channel and fl oodplain and is armored with rock riprap
and concrete chunks in this reach. Two locations on the right descending bank
were overly steep and posed a potential hazard to pedestrians in addition to
threatening to erode a parking lot shared by the city and the Eagles Club.
Allied Engineering assisted the City of Bozeman with design and permitting to
stabilize the stream bank along this reach of Bozeman Creek. Allied’s scope
of work and noteworthy project elements included:
1. Design of treatments to stabilize the overly steep banks using
approximately 65 tons of aesthetic naturally rounded boulders.
Boulders can be re-used if/when the planned enhancement/restoration
of this reach of stream is undertaken;
2. Completion of a Joint Permit Application for work in Montana streams
for a fl oodplain development permit, Montana Stream Protection Act
permit, Federal Clean Water Act permit, and Short-Term Water Quality
Standard for Turbidity permit;
3. Completion of a No-Rise fl oodplain analysis to ensure no increase in
fl ood elevations; and
4. Pro-bono work including assistance with materials source identifi cation,
materials cost estimate, and construction oversight.
Client Reference
Brian Heaston, PE
City of Bozeman
P.O. Box 1230
Bozeman, MT 59771-1230
(406) 582-2280
bheaston@BOZEMAN.NET
Completion Date
August 2015
Firm’s Contract Amount
$5,690
Construction Cost
~ $9,000 materials
Labor by City Street Department
Project Personnel
Doug Chandler, PE, PhD
Paul Sanford, PE, CFM
Jennifer Johnson, PE, CFM
Ron Orton
Location
Latitude: 45.678593°
Longitude: -111.032761°
Bozeman Creek - City Parking Lot
Bozeman, Montana
14-189
Before After
32 Discovery Drive . Bozeman, Montana 59718 . Ph: (406) 582-0221 . Fax: (406) 582-5770
299 Prairie Drive . Stanley, North Dakota 58784 . Ph. (701) 628-0221 . www.alliedengineering.com
The Hebgen Basin Fire District fi re hall sets on a 1.2 acre lot in a 28 acre 2-lot
minor subdivision. Flooding risk and potential fl ood hazards were identifi ed
for the subdivision as part of the Gallatin County entitlements process. Denny
Creek, several fl ood over-fl ow channels, and an irrigation canal were identifi ed
as potential fl ooding sources on the subdivision. Allied Engineering completed
detailed fi eld reconnaissance, topographic surveying, and hydrologic and
hydraulic analysis to characterize the one-percent exceedance probability
fl ood inundation extents on the property. Allied also completed a fl ood hazard
evaluation estimating and discussing other potential fl ood threats such as dam
breaks in the basin, debris jams, ice jams, landslides, fi re, and other factors
infl uencing fl ood risk. Both the Flood Study and the Flood Hazard Evaluation
were completed in accordance with Gallatin County Subdivision standards.
Key project features include:
• Topographic survey using GPS equipment;
• A hydrologic analysis for the area using USGS regression equations;
• A detailed site reconnaissance by a Senior Hydraulic Engineer to
observe the topography and site drainage features in order to formulate
ideas on potential split fl ow locations and fl ooding characteristics;
• Estimation of Denny Creek split fl ows entering the subdivision;
• Development of a fl oodplain map showing the estimated location and
depths of the one-percent exceedance probability inundation extents;
and
• Completion of a Flood Study Report and a Flood Hazard Evaluation.
Client Reference
Scott Waldron, Fire Chief
Hebgen Basin Fire District
P.O. Box 1508
West Yellowstone, MT 59758
(406) 646-9094
swaldron@hbrfd.com
Sean O’Callaghan
Gallatin County Floodplain
Administrator
(406) 582-3130
sean.ocallaghan@gallatin.mt.gov
Completion Date
January 2012
Firm’s Contract Amount
$10,500
Project Personnel
Paul Sanford, PE
Rory Romey, PE
Greg Finck, LS
Project Location
44.688051N
-111.240119W
Denny Creek Flood Study
Gallatin County, Montana
11-097
32 Discovery Drive . Bozeman, Montana 59718 . Ph: (406) 582-0221 . Fax: (406) 582-5770
299 Prairie Drive . Stanley, North Dakota 58784 . Ph. (701) 628-0221 . www.alliedengineering.com
Allied Engineering (prime consultant) collaborated with ERM (sub-consultant)
to perform 2D hydraulic modeling and fi sh habitat modeling on several
streams in the Intermountain Region (Region 4) of the US Forest Service.
The 2-dimensional hydraulic modeling computer program River2D was used
to develop steady state hydraulic models and estimate reach level fi sh habitat
characteristics for fry, juvenile, adult, and spawning life history stages of the
following fi sh species: Chinook salmon, steelhead, bull trout, cutthroat trout,
and brook trout. The team applied calibration and sensitivity analyses to fi ne
tune the hydraulic model. Fish habitat modeling was completed to develop
relationships between weighted usable area (WUA) and discharge. The team
also explored the relationship between cover and habitat calculations through
a macro developed in VBA.
The fi nal product included a report detailing methodologies and results as well
as all fi les produced during the project. Allied worked closely with the USFS
to create the report, and the results are critical to future planning eff orts for
streams in Idaho and Montana. Procedures were carefully documented to
ensure that the project will stand up to future scrutiny.
Client Reference
USDA-Forest Service-R4-
Natural Resources
Lyn Reinig, Hydrologist
mreinig@fs.fed.us
(208) 342-9067
or
Tim Page
tpage@fs.fed.us
(208) 342-9059
Completion Date
IDIQ Contract
2013-2017
Consultant
Contract Amount
< $1,000,000
Project Personnel
Paul Sanford, PE
Jennifer Johnson, PE
US Forest Service Instream Flow
Measurement Service
Intermountain Region
13-093
Velocity Output Graphic
Chinook Salmon Weighted Usable Area
32 Discovery Drive . Bozeman, Montana 59718 . Ph: (406) 582-0221 . Fax: (406) 582-5770 299 Prairie Drive . Stanley, North Dakota 58784 . Ph. (701) 628-0221 . www.alliedengineering.com
Allied Engineering was hired by Madison Engineering to complete fl oodplain permitting for a proposed crossing on Figgins Creek in Bozeman, MT. Since the crossing could not span the fl oodway, a no-rise analysis was required. Allied Engineering completed the no-rise analysis using ArcGIS, HEC-GeoRAS, and by modifying the proposed 2016 eff ective model prepared by Michael Baker. A no-rise analysis packet was successfully submitted to DNRC and included all relevant input and output data. The analysis and supporting data compared profi les and cross-section water surface elevations between the proposed and existing conditions to demonstrate the no-rise condition of the proposed crossing. GIS data used for the analysis was submitted as a spatial database.
Client ReferenceRob ClarkMadison Engineering(406) 586-0262
Completion DateMarch 2016
Team’s Contract Amount$9,431
Project PersonnelPaul Sanford, PE, CFMJennifer Johnson, PE, CFM
Figgins Creek Floodplain Analysis and PermittingBozeman, Montana
15-005
32 Discovery Drive . Bozeman, Montana 59718 . Ph: (406) 582-0221 . Fax: (406) 582-5770
299 Prairie Drive . Stanley, North Dakota 58784 . Ph. (701) 628-0221 . www.alliedengineering.com
AESI was hired by Gillilan Associates to complete hydraulic modeling and
drafting for the Ruby River Restoration project near the Ruby’s confl uence
with the Beaverhead River. The river has seen signifi cant down cutting and
a reduction in vegetative cover over the last 100 years - likely from man-
infl uenced manipulations of the river including an upstream dam. Additionally,
what has historically been a multi-thread river is now a single thread channel.
Restoration plans include adding fi ll and riffl e structures to help reconnect the
river with its fl oodplain. Two remnant meander bends and several fl ow splits
will be reactivated. Because of the complex nature of the restoration design,
the project team elected to use a 2D model setup (HEC-RAS) to simulate fl ows.
This allows for a more detailed output of shear stresses and split fl ows. While
the project is ongoing, AESI has completed the existing conditions model, and
the simulations are in good agreement with measured data. Moving forward,
AESI plans on iterating on the grading design to assure fl ow splits are activated
at appropriate fl ow levels and shear stress maximums are not exceeded.
Client Reference
Gillilan Associates
Scott Gillilan
P.O. Box 1176
Bozeman, MT 59715
(406) 581-1597
scott@gairesources.com
Completion Date
On-going
Firm’s Contract Amount
$27,000
Project Personnel
Paul Sanford, PE, CFM
Jennifer Johnson, PE, CFM
Ryan Dee, LS
Ruby River Restoration Project
Beaverhead County, Montana
16-063
32 Discovery Drive . Bozeman, Montana 59718 . Ph: (406) 582-0221 . Fax: (406) 582-5770
299 Prairie Drive . Stanley, North Dakota 58784 . Ph. (701) 628-0221 . www.alliedengineering.com
Allied provided surveying and HEC-RAS fl oodplain modeling for a Letter of
Map Revision (LOMR) request for a reach of Fiddler Creek just upstream of
West Rosebud Creek. A Duplicate Effective HEC-RAS model was developed to
replicate the original HEC-2 modeling. A corrected Effective HEC-RAS model
was also developed to refl ect detailed one-foot contour survey data. ArcMap
9.2 and HEC-GeoRAS were used to extract the HEC-RAS geometry model as
well as to map the resulting fl oodplain.
Client Reference
Andy Ferre
Fay Management, Inc.
406-586-4001
Completion Date
2007
Firm’s Contract Amount
$10,500
Project Personnel
Paul Sanford, PE, CFM
Kyle Thompson, LS
Greg Finck, LS
Fiddler Creek Flood Study & LOMR
Stillwater County, Montana
07-002
32 Discovery Drive . Bozeman, Montana 59718 . Ph: (406) 582-0221 . Fax: (406) 582-5770 299 Prairie Drive . Stanley, North Dakota 58784 . Ph. (701) 628-0221 . www.alliedengineering.com
The Three Forks Flood Study is the basis for the 2011 eff ective fl oodplain maps for the City of Three Forks and the surrounding un-incorporated area of Gallatin County. The project involved a fl oodplain study of the Madison and Jeff erson Rivers in the vicinity of Three Forks, Montana. The purpose of the fl ood study was to create updated FEMA Flood Insurance Rate Maps for the City of Three Forks. Allied Engineering’s scope of work included establishment of survey control, coordination with an aerial mapping company, hydraulic structure survey, and bathymetric river cross-sections and fl oodplain mapping. Allied Engineering utilized HEC-GeoRas and ArcView to perform the fl oodplain mapping. The studied reach included roughly 7.5 square miles of the fl oodplain of the two rivers including both upstream and downstream of the City of Three Forks. Allied’s client, Joe Van Mullem, performed the hydrologic analysis and fl oodplain modeling. The fl oodplain modeling was performed with the computer program HEC-RAS and involved complicated fl ow spits, levees, ice jamming analysis, and numerous bridges.
Key Project Elements:
• Automated Geometry Extraction and Floodplain Mapping• HEC-RAS, HEC-GeoRAS, ArcView with 3D Analyst• Compliance with FEMA Guidelines and Specifi cations for Flood Hazard Mapping Partners• Floodplain mapping for an area covering roughly 7.5 square miles• Over 6 miles of river studied• Over 40 bathymetric cross-sections utilizing GPS, a boat, and conventional techniques.
Client ReferenceJoe Van MullemVan Mullem Engineering406-586-0701Ray Noble, Deputy ClerkCity of Three Forks406-285-3431
Completion Date2005
Total Project Cost$90,000
Firm’s Contract Amount$32,500
Project PersonnelPaul Sanford, PE, CFMKyle Thompson, LS
Three Forks Flood StudyThree Forks, Montana
02-134
32 Discovery Drive . Bozeman, Montana 59718 . Ph: (406) 582-0221 . Fax: (406) 582-5770
299 Prairie Drive . Stanley, North Dakota 58784 . Ph. (701) 628-0221 . www.alliedengineering.com
Allied Engineering provided fl oodplain maps to Yellowstone County for a re-study
of Cove Creek and a new study for Five Mile Creek.
The project included surveying cross-sections, hydrologic and hydraulic analysis,
and production of fl oodplain maps. The total stream length was over 10 miles.
Allied teamed with Van Mullem Engineering who provided the hydrologic and
hydraulic analysis. Allied provided surveying, base map creation, and fl oodplain
mapping.
Key Project Elements:
• FEMA re-study of Cove Creek. New study for Five Mile Creek
• Over 10 miles of stream length studied
• Compliance with FEMA Publication 37 - Guidelines for Study
Contractors
• Assistance to DNRC and FEMA to incorporate the studies into the
Yellowstone County DFIRM project.
• 2-ft accuracy topographic mapping of Five Mile Creek Floodplain.
Detailed fl oodplain mapping of Five Mile Creek.
Original Contract
Client Reference
Jim Kraft
Yellowstone County
406-256-2775
Completion Date
September 2004
Firm’s Contract Amount
$36,000
Additional Contracted Work
Client Reference
Celinda Adair
DNRC
406-444-6656
Completion Date
April 2009
Firm’s Contract Amount
$17,000
Project Personnel
Paul Sanford, PE, CFM
Doug Chandler, PE, PhD
Dean Squires
Kyle Thompson, LS
John Pugh, LS
Yellowstone County Floodplain Studies
Yellowstone County, Montana
02-040
WEST Consultants, Inc. – Water • Environmental • Sedimentation • Technology
FLOOD INSURANCE STUDY AND FLOOD
RISK REDUCTION ALTERNATIVES
ANALYSIS FOR CITY OF TURNER, OR
City of Turner, Marion County, OR
A FEMA Flood Insurance Study was conducted
along approximately 4.2 stream miles of Mill
Creek and Mill Creek Bypass in the City of Turner,
in Marion County, OR. As part of the study, a
flood risk reduction alternatives analysis was
conducted to understand what modifications to
existing hydraulic structures, channels and
floodplains could be implemented to reduce flood
risk within the City.
Ground surveys for approximately 53 cross
sections and 12 hydraulic structures were
completed using a combination of RTK GPS and
Optical Total Station equipment. This allowed for
all of the survey data to be quickly and easily geo-
referenced to existing National Geodetic Survey
(NGS) monuments, resulting in easy integration
with available LiDAR topographic data.
HEC-RAS was used to perform the 1-D hydraulic
analysis. Water surface profiles for the 2-, 5-, 10-,
25-, 50-, 100-, and 500-year flood events as well as
the 100-year floodway were determined. All
geometry data within the hydraulic model is geo-
referenced, so the output data could be post-
processed using automated mapping and display
techniques in HEC-RAS and ArcGIS. After
thorough in-house Corps QC reviews, the
completed products (including hydraulic model,
flood profiles, floodway data tables, work maps,
FBS audit results, MT-2 forms and all backup
data) were submitted to FEMA as a Letter of Map
Revision for incorporation into the Flood Insurance
Study for Marion County and Incorporated Areas.
PROJECT ELEMENTS: CLIENT:
Stream Channel Survey
1-D Hydraulic Modeling
Floodplain/Floodway Delineation and Mapping
Letter of Map Revision (LOMR)
U.S. Army Corps of Engineers / City of Turner
Julie Ammann (503) 808-4863 / David Sawyer (503) 743-2155
COMPLETION DATE:
December 2014
Flooding along Mill Creek upstream of 3rd Street bridge
Cross Section Layout through downtown Turner, OR
WEST Consultants, Inc. – Water • Environmental • Sedimentation • Technology
LOWER NORTH SANTIAM RIVER
RESTORATION ALTERNATIVE ANALYSIS
Marion County, OR
WEST Consultants (WEST) supported River Design
Group (RDG) in the development of floodplain and
off channel habitat improvement projects along the
lower North Santiam River. Working for the North
Santiam Watershed Council, WEST and RDG have
developed and evaluated various restoration
alternatives including secondary channel connection
improvements and levee removal.
WEST developed a 2-dimensional HEC-RAS
hydraulic model of the North Santiam River. The
model extends approximately from Stayton to the
Hatch Airport. The model shows the connectivity
between the main channel and secondary channels,
including Diekman Creek, and the floodplain for
various river flow magnitudes for existing conditions
and for each of the various habitat improvement
alternatives. The model allows the Watershed
Council
to understand how much additional
secondary channel and floodplain
connectivity would be expected from
each alternative, providing a basis for
ranking each alternative.
As part of the alternatives analysis,
the changes in flood risk to
surrounding properties associated
with each alternative were
determined. This was done to help
understand and communicate the
impacts of each alternative with the
Watershed Council and project
stakeholders. It will also be one of
the criteria used for the selection of
the preferred restoration alternatives.
PROJECT ELEMENTS: CLIENT:
Alternatives Analysis
2-D Hydraulic Modeling
Habitat Restoration
Flood Risk Impact Assessment
North Santiam Watershed Council
Rebecca McCoun (503) 930-8202
COMPLETION DATE:
2016
Diekman Creek secondary floodplain channel
Two-dimensional HEC-RAS results displaying increased floodplain connectivity
Appendix C
www.alliedengineering.com
Bozeman Offi ce:
32 Discovery Drive
Bozeman, Montana 59718
Phone: 406-582-0221
Fax 406-582-5770