hydrologic & hydraulic engineering services.

h&h.

Wallace Design Collective utilizes advanced hydraulic models to manage floodplains, plan watersheds and assess drainage systems.

We embrace innovation and develop new solutions for both large-scale riverine flooding and localized community issues. We prioritize quality through effective, sustainable, and long-lasting design in the face of increasingly severe weather events.

planning.

Comprehensive flood resilience planning safeguards your community and optimizes budgetary considerations. Our in-depth studies prioritize the most costeffective solutions, analyzing alternatives and maximizing your return on investment. We understand the importance of sustainable practices, seamlessly integrating low-impact development throughout the planning process to qualify for grants and protect your environment.

| master drainage plans

| flood risk studies

| flood mitigation feasibility studies

| regional flood plans

| watershed project plans

| dam and levee assessments

| stormwater utility fee programs

design.

Imagine a floodplain improvement as unique as your community. We leverage cutting-edge tools and approaches to design drainage and detention systems tailored specifically for your project, whether a small site, a sprawling town, a babbling brook, or a mighty river, a quiet country road, or a bustling highway bridge.

We leverage our team’s vast knowledge and commitment to ongoing innovation to develop unique, tailored solutions that optimize results for your specific needs.

| roadway drainage

| bridge hydraulics

| storm sewer drainage systems

| regional detention facilities

| green infrastructure/ low impact development

| multifaceted flood mitigation solutions

| mitigative wetlands

| streambank restoration

| dam and levee systems

software.

We use the industry’s most powerful, governmentapproved software to give your watershed analysis and hydraulic design a fresh, innovative edge. Our team stays ahead of the curve, exploring new tools and approaches. This means we can craft unique solutions that match your project’s specific needs.

| riverine watershed modeling

• HEC-HMS

• HEC-MetView

• HEC-SSP

• HEC-RAS (1-D and 2-D)

| hydraulic structure modeling

• NRCS SITES

• NRCS WinDAM

• FHWA HY-8

| storm sewer modeling

• Bentley CivilStorm

• EPA SWMM

• CHI PCSWMM (1-D and 2-D)

| mapping and plotting

• ESRI ArcGIS Pro

• AutoDesk Civil 3D

• FEMA RASPlot

permitting.

Our comprehensive H&H permitting services facilitate smooth dam construction and floodplain development projects. We handle everything from reports and data sets to complete permit applications, all in compliance with regulations. Our team guides you through the process, saving you time and leading to a successful outcome.

| dam safety compliance

• permitting

• hydrologic sufficiency assessments

• breach analysis and reclassification

• emergency action plans

• operation and maintenance plans

| regulatory floodplain compliance

• community floodplain development permits

• letters of map revision (CLOMR and LOMR)

Our GIS services transform complex data into clear, interactive maps and dashboards for floodplain studies and design. This empowers informed decisions by both stakeholders and the community. Public outreach is enhanced with comment portals and project trackers, fostering transparency and collaboration. Ultimately, these tools bridge the data gap, leading to smarter planning and successful project outcomes.

| stormwater asset inventories

| flood risk datasets and mapping

| data analytics for planning insights and inventories

| public outreach

• interactive maps and dashboards

• comment portals

• project status trackers

enhanced services.

We go beyond traditional study and design services to deliver tangible benefits for your project. We can secure funding through FEMA grant applications and analyze the cost-benefits of FEMA and PL-566 grants. Additionally, we develop applications for

Letters of Map Amendment complete with elevation certificates. Our depth of skill and versatility allow us to successfully meet your unique project needs.

| FEMA grant funding applications

| FEMA and PL-566 grant cost-benefit analyses

| letters of map amendment

| elevation certificates