NSF award 2629690 · University of Hawaii

RAPID: Capturing Perishable Interfacial Erosion Signatures in an Aging Wooden-Core Earthen Dam Under Near-Overtopping Reservoir Levels

Final report due

28 November 2027

in 406 days · The award ends on 31 July 2027.

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Dates this award owes

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Decide about an extension2 Apr 2027in 166 days
award ending 2027-07-31 · Research.gov
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Extension request16 Jun 2027in 241 days
award ending 2027-07-31 · Research.gov
PAPPG 24-1: “at least 45 days prior to the end date”
No-cost extension notice21 Jul 2027in 276 days
award ending 2027-07-31 · Research.gov
PAPPG 24-1: “at least ten calendar days prior to the end date”
Final report due28 Nov 2027in 406 days
award ending 2027-07-31 · Research.gov
PAPPG 24-1: “no later than 120-days following the end date of the award”
Project outcomes report due28 Nov 2027in 406 days
award ending 2027-07-31 · Research.gov
PAPPG 24-1: “no later than 120 days following the end date”
Award is closed out28 Nov 2027in 406 days
award ending 2027-07-31 · Research.gov
PAPPG 24-1: “financially closed out 120 days after their expiration date”

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NSF lists this award's end date as 31 July 2027.
NSF rules say the final report is due no later than 120 days after that.
So the final report is due by 28 November 2027.

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Award card

Award number: 2629690
Period of support: 1 Aug 2026 – 31 Jul 2027
Amount: $149,996
Awardee: University of Hawaii, Honolulu, HI
Program: ECI-Engineering for Civil Infr
Directorate: ENG

Abstract

Earthen dams built over a century ago represent a vulnerable segment of national infrastructure. In March 2026, extreme storms in Hawaii severely saturated the 121-year-old wooden-core Wahiawa Dam, prompting state-mandated emergency evacuations of over 5,500 residents, an expedited transfer of ownership to the state, and construction remediation of the spillway and downstream embankment. This dam features an unusual…

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